MAXIM MAX349, MAX350 Technical data

General Description

The MAX349/MAX350 are 8-channel and dual 4-channel
serially controlled multiplexers (muxes). These muxes
conduct equally well in either direction. On-resistance
(100Ω max) is matched between switches to 16Ω max
and is flat (10Ω max) over the specified signal range.

These CMOS devices can operate continuously with
dual power supplies ranging from ±2.7V to ±8V or a sin­gle supply between +2.7V and +16V. Each mux can
handle rail-to-rail analog signals. The off-leakage current
is only 0.1nA at +25°C or 5nA at +85°C.

Upon power-up, all switches are off and the internal
shift registers are reset to zero.

The serial interface is compatible with SPI™/QSPI™
and MICROWIRE™. Functioning as a shift register, it
allows data (at DIN) to be clocked in synchronously
with the rising edge of clock (SCLK). The shift register’s
output (DOUT) enables several MAX349s or MAX350s
to be daisy chained.

All digital inputs have 0.8V or 2.4V logic thresholds,
ensuring both TTL and CMOS-logic compatibility when
using ±5V supplies or a single +5V supply.

________________________Applications

Serial Data-Acquisition Industrial and Process­Systems Control Systems

Avionics ATE Equipment
Audio Signal Routing Networking

____________________________Features

♦ SPI/QSPI, MICROWIRE-Compatible Serial

Interface

♦ 8 Separately Controlled SPST Switches
♦ Single 8-to-1 Mux (MAX349)

Dual 4-to-1 Mux (MAX350)

♦ 100Ω Signal Paths with ±5V Supplies
♦ Rail-to-Rail

®

Signal Handling

♦ Asynchronous RESET Input
♦ ±2.7V to ±8V Dual Supplies

+2.7V to +16V Single Supply

♦ >2kV ESD Protection per Method 3015.7
♦ TTL/CMOS-Compatible Inputs (with +5V or ±5V

Supplies)

MAX349/MAX350

Serially Controlled, Low-Voltage,

8-Channel/Dual 4-Channel Multiplexers

________________________________________________________________

Maxim Integrated Products

1

18
17
16
15
14
13
12
11

1
2
3
4
5
6
7
8

CS
RESET
DOUT
V-

GND

DIN

V+

SCLK

TOP VIEW

N.C.
NO7
NO6
NO5

NO2

NO1

NO0

COM

10

9

NO4

NO3

DIP/SO

MAX349

LOGIC

18
17
16
15
14
13
12
11

1
2
3
4
5
6
7
8

CS
RESET
DOUT
V-

GND

DIN

V+

SCLK

COMB
NO0B
NO1B
NO2B

NO2A

NO1A

NO0A

COMA

10

9

NO3B

NO3A

DIP/SO

MAX350

LOGIC

N.C. = NOT INTERNALLY
CONNECTED

Pin Configurations/Functional Diagrams

19-0451; Rev 1; 10/98

PART

MAX349CPN

MAX349CWN
MAX349CAP 0°C to +70°C

0°C to +70°C

0°C to +70°C

TEMP. RANGE PIN-PACKAGE

18 Plastic DIP
18 Wide SO
20 SSOP

Ordering Information

Ordering Information continued at end of data sheet.

*Contact factory for dice specifications.

MAX349C/D 0°C to +70°C Dice*

Pin Configurations continued at end of data sheet.

SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.

For free samples & the latest literature: http://www.maxim-ic.com, or phone [phone].
For small orders, phone [phone].

查询MAX349供应商

MAX349/MAX350

Serially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS—Dual Supplies

(V+ = +4.5V to +5.5V, V- = -4.5V to -5.5V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

Voltages Referenced to GND

V+...........................................................................-0.3V, +17V

V-............................................................................-17V, +0.3V

V+ to V-...................................................................-0.3V, +17V

SCLK,

CS, DIN, DOUT, RESET .................-0.3V to (V+ + 0.3V)

NO, COM.................................................(V- - 2V) to (V+ + 2V)

Continuous Current into Any Terminal..............................±30mA

Peak Current, NO or COM

(pulsed at 1ms, 10% duty cycle).................................±100mA

Continuous Power Dissipation (T

A

= +70°C)
18-Pin Plastic DIP (derate 11.11mW/°C above +70°C) ..889mW

18-Pin SO (derate 9.52mW/°C above +70°C)...............762mW

20-Pin SSOP (derate 8.00mW/°C above +70°C) ..........640mW

18-Pin CERDIP (derate 10.53mW/°C above +70°C).....842mW

Operating Temperature Ranges

MAX349C_ _, MAX350C_ _ .................................0°C to +70°C

MAX349E_ _, MAX350E_ _...............................-40°C to +85°C

MAX349M_ _, MAX350M_ _ ...........................-55°C to +125°C

Storage Temperature Range.............................-65°C to +150°C

Lead Temperature (soldering, 10sec).............................+300°C

CONDITIONS UNITS

MIN TYP MAX

(Note 1)

SYMBOLPARAMETER

60 100

VV- V+V

COM

, V

NO

Analog Signal Range

V+ = 5V, V- = -5V,
V

COM

= ±3V, INO= 1mA

Ω

125

R

ON

COM-NO On-Resistance

C, E, M
TA= +25°C
C, E, M
TA= +25°C 16
C, E, M

V+ = 5V, V- = -5V,
V

COM

= ±3V, INO= 1mA

Ω

20

∆R

ON

COM-NO On-Resistance Match
Between Channels (Note 2)

TA= +25°C 10
C, E, M

V+ = 5V, V- = -5V, INO= 1mA,
V

COM

= -3V, 0V, 3V

Ω

15

R

FLAT(ON)

COM-NO On-Resistance
Flatness (Note 2)

TA= +25°C -0.1 0.002 0.1

ANALOG SWITCH

C, E -5 5

V+ = 5.5V, V- = -5.5V,
V

COM

= -4.5V, VNO= 4.5V

M -10 10
TA= +25°C -0.1 0.002 0.1
C, E -5 5

NO Off-Leakage Current
(Note 3)

I

NO(OFF)

V+ = 5.5V, V- = -5.5V,
V

COM

= 4.5V, VNO= -4.5V

M -10 10

nA

TA= +25°C -0.1 0.002 0.1
C, E -10 10
M -100 100
TA= +25°C -0.1 0.002 0.1
C, E -5 5

V+ = 5.5V,
V- = -5.5V,
V

COM

=
±4.5V,
VNO= ±4.5V

M -50 50
TA= +25°C -0.2 0.002 0.2
C, E -10 10
M -100 100
TA= +25°C -0.2 0.002 0.2
C, E -5 5

COM Off-Leakage Current
(Note 3)

I

COM(OFF)

V+ = 5.5V,
V- = -5.5V,
V

COM

=

-4.5V,
VNO= 4.5V

M -50 50

nA

MAX349

MAX349

MAX350

MAX350

MAX349/MAX350

Serially Controlled, Low-Voltage,

8-Channel/Dual 4-Channel Multiplexers

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)

(V+ = +4.5V to +5.5V, V- = -4.5V to -5.5V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.)

V2.4C, E, MV

IH

DIN, SCLK, CS, RESET Input
Voltage Logic Threshold High

MAX350

nA

-50 50M

V+ = 5.5V,
V- = -5.5V,
V

COM

= V

NO

=

±4.5V

COM On-Leakage Current
(Note 3)

I

COM(ON)

-5 5C, E

MAX349

-0.2 0.02 0.2TA= +25°C

-100 100M

-10 10C, E

DOUT Output Voltage Logic Low V

DOUT

VI

DOUT

= -1.6mA 0 0.4C, E, M

mV100C, E, M

DOUT Output Voltage Logic High V

DOUT

SCLK

HYST

VI

DOUT

= 0.8mA

SCLK Input Hysteresis

2.8 V+C, E, M

µA-1 0.03 1C, E, M

V

DIN

, V

SCLK

,

VCS= 0.8V or 2.4V

I

IH, IIL

DIN, SCLK, CS, RESET Input
Current Logic High or Low

V0.8C, E, MV

IL

DIN, SCLK, CS, RESET Input
Voltage Logic Threshold Low

-0.2 0.001 0.2TA= +25°C

Turn-On Time t

ON

400

ns

From rising edge of CS

C, E, M

200 275TA= +25°C

-2 2

30

C, E, M

C, E, M

RL= 50Ω, CL= 15pF,
V

NO

= 1V

RMS

, f = 100kHz

Off-Isolation V

ISO

dB

pC

pF
pF

Charge Injection (Note 4)
NO Off-Capacitance
COM Off-Capacitance

V

CTE

C

NO(OFF)

C

COM(OFF)VCOM

= GND, f = 1MHz

CL= 1nF, VNO= 0V, RS= 0Ω

Break-Before-Make Delay t

BBM

2

ns

VNO= GND, f = 1MHz

TA= +25°C

2TA= +25°C

110

From rising edge of CS

TA= +25°C

540TA= +25°C

PARAMETER SYMBOL

MIN TYP MAX

(Note 1)

UNITS

V+ Supply Current I+

720

µA

V- Supply Current I-

-1 0.1 1
µA

Turn-Off Time t

OFF

300

ns

From rising edge of CS

C, E, M

90 150TA= +25°C

DIN = CS = SCLK = 0V or V+,
RESET = 0V or V+

DIN = CS = SCLK = 0V or V+,
RESET = 0V or V+

Channel-to-Channel Crosstalk V

CT

dB< -90

RL= 50Ω, CL= 15pF,
VNO= 1V

RMS

, f = 100kHz

TA= +25°C

Switch On-Capacitance C

(ON)

> 90

C, E, M

TA= +25°C

pF

Power-Supply Range V+, V- ±3 ±8 V

TA= +25°C

8

CONDITIONS

V

COM

= VNO= GND,

f = 1MHz

TA= +25°C

TA= +25°C

DIGITAL I/O

SWITCH DYNAMIC CHARACTERISTICS

POWER SUPPLY

MAX349/MAX350

Serially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers

4 _______________________________________________________________________________________

SCLK Frequency f

SCLK

RESET Minimum Pulse Width

t

RW

70 nsTA= +25°C

Fall Time of DOUT (Note 4) t

DF

100 ns

20% of V+ to 70% of V+,
CL= 10pF

C, E, M

Allowable Fall Time at DIN, SCLK
(Note 4)

t

SCF

2 µs

20% of V+ to 70% of V+,
CL= 10pF

C, E, M

Allowable Rise Time at DIN, SCLK
(Note 4)

t

SCR

2 µs

20% of V+ to 70% of V+,
CL= 10pF

C, E, M

Rise Time of DOUT (Note 4) t

DR

100 ns

20% of V+ to 70% of V+,
CL= 10pF

C, E, M

DIN Data Valid after Falling SCLK
(Note 4)

t

DO

400

ns

Data Hold Time

Minimum Data Setup Time t

DS

17 100 ns

t

DH

0 -17

85

50% of SCLK to 10% of DOUT,
CL= 10pF

SCLK Low Time

ns

t

CL

C, E, M

190 ns

TA= +25°C

C, E, M

C, E, M

PARAMETER SYMBOL

MIN TYP MAX

(Note 1)

UNITS

C, E, M

SCLK High Time

CS Lag Time

t

CSH2

240 ns

t

CH

190

CS Lead Time

Cycle Time

ns

t

CH +tCL

480

t

CSS

240 ns

C, E, M

0 2.1nsMHz

C, E, M

C, E, M

C, E, M

C, E, M

CONDITIONS

SERIAL DIGITAL INTERFACE

TIMING CHARACTERISTICS—Dual Supplies (Figure 1)

(V+ = +4.5V to +5.5V, V- = -4.5V to -5.5V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.)

Note 1: The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column.
Note 2: ∆R

ON

= R

ON(max)

- R

ON(min)

. On-resistance match between channels and on-resistance flatness are guaranteed only with
specified voltages. Flatness is defined as the difference between the maximum and minimum value of on-resistance as
measured over the specified analog signal range.

Note 3: Leakage parameters are 100% tested at maximum rated hot temperature and guaranteed by correlation at room temp.
Note 4: Guaranteed by design.
Note 5: Leakage testing at single supply is guaranteed by testing with dual supplies.
Note 6: See Figure 6. Off-isolation = 20log

10VCOM/VNO

, V

COM

= output. NO = input to off switch.

Note 7: Between any two switches. See Figure 3.

MAX349/MAX350

Serially Controlled, Low-Voltage,

8-Channel/Dual 4-Channel Multiplexers

_______________________________________________________________________________________ 5

ELECTRICAL CHARACTERISTICS—Single +5V Supply

(V+ = +4.5V to +5.5V, V- = 0V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.)

TA= +25°C

C, E, M

125 175

C, E, M

VV- V+V

COM

, V

NO

Analog Signal Range

TA= +25°C -0.1 0.002 0.1

TA= +25°C -0.2 0.002 0.2

C, E

C, E

CONDITIONS

-10 10

-10 10

V+ = 5V, V

COM

= 3.5V,

INO= 1mA

M -100 100
TA= +25°C

M -100 100
TA= +25°C -0.2 0.002 0.2

MAX349

C, E -5 5
M

Ω

225

R

ON

COM-NO On-Resistance

-50 50

-0.1 0.002 0.1

nA

V+ = 5.5V,
V

COM

= 0V,

VNO= 4.5V

MAX350

I

COM(OFF)

COM Off-Leakage Current
(Notes 4, 5)

TA= +25°C -0.2 0.01 0.2
C, E -10 10
M -100 100
TA= +25°C -0.2 0.02 0.2

MAX349

C, E -5 5
M

MAX349

-50 50

C, E -5 5
M -50 50

V+ = 5.5V,
V

COM

= VNO=

±4.5V

nA

MAX350

V+ = 5.5V,
V

COM

= 4.5V,

VNO= 0V

I

COM(ON)

COM On-Leakage Current
(Notes 4, 5)

MAX350

UNITS

MIN TYP MAX

(Note 1)

SYMBOLPARAMETER

TA= +25°C -0.1 0.002 0.1
C, E -5 5
M

V+ = 5.5V, V

COM

= 4.5V,

VNO= 0V

-10 10

C, E, M 2.4

C, E, M 0.8V

IL

V

IH

DIN, SCLK, CS, RESET Input
Voltage Logic Threshold Low

DIN, SCLK, CS, RESET Input
Voltage Logic Threshold High

V

V

C, E, M -1 0.03 1
C, E, M 2.8 V+

C, E, M 0 0.4I

DOUT

= -1.6mA

I

DOUT

= 0.8mA

V

DIN

, V

SCLK

,

VCS= 0.8V or 2.4V

V

DOUT

V

DOUT

IIH, I

IL

DOUT Output Voltage Logic Low

DOUT Output Voltage Logic High

DIN, SCLK, CS, RESET Input
Current Logic High or Low

V

V

µA

C, E, M 100SCLK

HYST

SCLK Input Hysteresis mV

TA= +25°C 720
C, E, M 30

DIN = CS = SCLK = 0V or V+,
RESET = 0V or V+

I+V+ Supply Current µA

TA= +25°C -0.1 0.002 0.1
C, E -5 5
M

V+ = 5.5V, V

COM

= 0V,

VNO= 4.5V

nA

-10 10

I

NO(OFF)

NO Off-Leakage Current
(Notes 4, 5)

DIGITAL I/O

ANALOG SWITCH

POWER SUPPLY

MAX349/MAX350

Serially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers

6 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS—Single +5V Supply (continued)

(V+ = +4.5V to +5.5V, V- = 0V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.)

CL= 1nF, VNO= 0V, RS= 0ΩV

CTE

Charge Injection (Note 4) pC

dB

CONDITIONS

TA= +25°C

TA= +25°C

160 400

> 90

TA= +25°C

RL= 50Ω, CL= 15pF,
VNO= 1V

RMS

, f = 100kHz

< -90

C, E, M

From rising edge of CS

ns

dB

V

ISO

V

CT

Channel-to-Channel Crosstalk
(Note 7)

Off-Isolation (Note 6)

RL= 50Ω, CL= 15pF,
VNO= 1V

RMS

, f = 100kHz

500

t

ON

Turn-On Time

TA= +25°C 60 200
C, E, M

From rising edge of CS

ns

300

t

OFF

Turn-Off Time

UNITS

MIN TYP MAX

(Note 1)

SYMBOLPARAMETER

TA= +25°C

15

TA= +25°C

From rising edge of CS

110

ns

t

BBM

Break-Before-Make Delay

SWITCH DYNAMIC CHARACTERISTICS

MAX349/MAX350

Serially Controlled, Low-Voltage,

8-Channel/Dual 4-Channel Multiplexers

_______________________________________________________________________________________ 7

TIMING CHARACTERISTICS—Single +5V Supply (Figure 1)

(V+ = +4.5V to +5.5V, V- = 0V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.)

SERIAL DIGITAL INTERFACESERIAL DIGITAL INTERFACE

Rise Time of DOUT (Note 4) t

DR

100 ns

20% of V+ to 70% of V+,
CL= 10pF

C, E, M

Allowable Fall Time at DIN,
SCLK (Note 4)

t

SCF

2 µs

20% of V+ to 70% of V+,
CL= 10pF

C, E, M

Allowable Rise Time at DIN,
SCLK (Note 4)

t

SCR

2 µs

20% of V+ to 70% of V+,
CL= 10pF

C, E, M

DIN Data Valid after Falling SCLK
(Note 4)

t

DO

400

ns

Data Hold Time (Note 4)

Minimum Data Setup Time
(Note 4)

t

DS

17 100 ns

t

DH

-17
85

50% of SCLK to 10% of
DOUT, CL= 10pF

SCLK Low Time (Note 4)

ns

t

CL

C, E, M

190 ns

TA= +25°C

C, E, M

C, E, M

PARAMETER SYMBOL

MIN TYP MAX

(Note 1)

UNITS

C, E, M

SCLK High Time (Note 4)

CS Lag Time (Note 4)

t

CSH2

240 ns

t

CH

190

CS Lead Time (Note 4)

Cycle Time (Note 4)

SCLK Frequency f

SCLK

ns

0 2.1 MHz

t

CH +tCL

480

t

CSS

240 ns

C, E, M

ns

C, E, M

C, E, M

C, E, M

C, E, M

CONDITIONS

C, E, M

20% of V+ to 70% of V+,
CL= 10pF

ns100t

DF

Fall Time of DOUT (Note 4)

Note 1: The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column.
Note 2: ∆R

ON

= R

ON(max)

- R

ON(min)

. On-resistance match between channels and on-resistance flatness are guaranteed only with
specified voltages. Flatness is defined as the difference between the maximum and minimum value of on-resistance as
measured over the specified analog signal range.

Note 3: Leakage parameters are 100% tested at maximum rated hot temperature and guaranteed by correlation at room temp.
Note 4: Guaranteed by design.
Note 5: Leakage testing at single supply is guaranteed by testing with dual supplies.
Note 6: See Figure 6. Off-isolation = 20log

10VCOM/VNO

, V

COM

= output. NO = input to off switch.

Note 7: Between any two switches. See Figure 3.

RESET Minimum Pulse Width

t

RW

70 nsTA= +25°C

MAX349/MAX350

Serially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers

8 _______________________________________________________________________________________

V

ELECTRICAL CHARACTERISTICS—Single +3V Supply

(V+ = +3.0V to +3.6V, V- = 0V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.)

TA= +25°C

C, E, M

270 500

C, E, M

C, E, M 100

VV- V+V

COM

, V

NO

C, E 2.4

Analog Signal Range

TA= +25°C -0.1 0.002 0.1

TA= +25°C -0.2 0.002 0.2

C, E

C, E

CONDITIONS

-10 10

-10 10

V+ = 3.0V, V

COM

= 1.5V,

INO= 1mA

M -100 100
TA= +25°C

M -100 100
TA= +25°C -0.2 0.002 0.2

C, E 0.8

MAX349

C, E -5 5
M

Ω

600

R

ON

COM-NO On-Resistance

-50 50

-0.1 0.002 0.1

nA

V+ = 3.6V,
V

COM

= 0V,

VNO= 3V

SCLK

HYST

MAX350

I

COM(OFF)

COM Off-Leakage Current
(Notes 4, 5)

TA= +25°C -0.2 0.01 0.2
C, E -10 10
M -100 100
TA= +25°C

SCLK Input Hysteresis

-0.2 0.02 0.2

MAX349

mV

C, E -5 5
M

V

IL

V

IH

MAX349

-50 50

C, E -5 5
M -50 50

V+ = 3.6V,
V

COM

= VNO= 3V

nA

MAX350

V+ = 3.6V,
V

COM

= 3V,

VNO= 0V

I

COM(ON)

COM On-Leakage Current
(Notes 4, 5)

DIN, SCLK, CS, RESET Input
Voltage Logic Threshold Low

DIN, SCLK, CS, RESET Input
Voltage Logic Threshold High

V

V

C, E -1 0.03 1
C, E, M 2.8 V+

C, E, M

MAX350

0 0.4

UNITS

MIN TYP MAX

(Note 1)

SYMBOLPARAMETER

I

DOUT

= -1.6mA

I

DOUT

= 0.1mA

V

DIN

, V

SCLK

,

VCS= 0.8V or 2.4V

V

DOUT

V

DOUT

IIH, I

IL

DOUT Output Voltage Logic Low

DOUT Output Voltage Logic High

DIN, SCLK, CS, RESET Input
Current Logic High or Low

V

V

µA

C, E, M 30

DIN = CS = SCLK = 0V or V+,
RESET = 0V or 5V

I+V+ Supply Current µA

TA= +25°C 620

DIGITAL I/O

ANALOG SWITCH

POWER SUPPLY

MAX349/MAX350

Serially Controlled, Low-Voltage,

8-Channel/Dual 4-Channel Multiplexers

_______________________________________________________________________________________ 9

MAX349/MAX350

ELECTRICAL CHARACTERISTICS—Single +3V Supply (continued)

(V+ = +3.0V to +3.6V, V- = 0V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.)

SWITCH DYNAMIC CHARACTERISTICS

Break-Before-Make Delay (Note 4) t

BBM

ns

110

From rising edge of CS

TA= +25°C

515TA= +25°C

PARAMETER SYMBOL

MIN TYP MAX

(Note 1)

UNITS

Turn-Off Time (Note 4) t

OFF

400

ns

From rising edge of CS

C, E, M

120 300TA= +25°C

Turn-On Time (Note 4) t

ON

700

RL= 50Ω, CL= 15pF,
VNO= 1V

RMS

, f = 100kHz

Off-Isolation (Note 6)
Channel-to-Channel Crosstalk

(Note 7)

V

CT

V

ISO

dB

ns

From rising edge of CS

C, E, M

< –90

RL= 50Ω, CL= 15pF,
VNO= 1V

RMS

, f = 100kHz

TA= +25°C

> 90

275 600TA= +25°C

TA= +25°C

CONDITIONS

dB

pCCharge Injection (Note 4) V

CTE

CL= 1nF, VNO= 0V, RS= 0Ω

Note 1: The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column.
Note 2: ∆R

ON

= R

ON(max)

- R

ON(min)

. On-resistance match between channels and on-resistance flatness are guaranteed only with
specified voltages. Flatness is defined as the difference between the maximum and minimum value of on-resistance as
measured over the specified analog signal range.

Note 3: Leakage parameters are 100% tested at maximum rated hot temperature and guaranteed by correlation at room temp.
Note 4: Guaranteed by design.
Note 5: Leakage testing at single supply is guaranteed by testing with dual supplies.
Note 6: See Figure 6. Off-isolation = 20log

10VCOM/VNO

, V

COM

= output. NO = input to off switch.

Note 7: Between any two switches. See Figure 3.

MAX349/MAX350

Serially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers

10 ______________________________________________________________________________________

TIMING CHARACTERISTICS—Single +3V Supply (Figure 1)

(V+ = +3.0V to +3.6V, V- = 0V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.)

SERIAL DIGITAL INTERFACE

RESET Minimum Pulse Width
(Note 4)

t

RW

105 nsTA= +25°C

Allowable Fall Time at DIN, SCLK
(Note 4)

t

SCF

2 µs

20% of V+ to 70% of V+,
CL= 10pF

C, E, M

Fall Time of DOUT (Note 4) t

DF

100 ns

20% of V+ to 70% of V+,
CL= 10pF

C, E, M

Rise Time of DOUT (Note 4) t

DR

100 ns

20% of V+ to 70% of V+,
CL= 10pF

C, E, M

Allowable Rise Time at DIN,
SCLK (Note 4)

t

SCR

2 µs

20% of V+ to 70% of V+,
CL= 10pF

C, E, M

DIN Data Valid after Falling SCLK
(Note 4)

t

DO

400

ns

Data Hold Time (Note 4)

Minimum Data Setup Time
(Note 4)

t

DS

38 120 ns

t

DH

-38

150

50% of SCLK to 10% of
DOUT, CL= 10pF

SCLK Low Time (Note 4)

ns

t

CL

C, E, M

190 ns

TA= +25°C

C, E, M

C, E, M

PARAMETER SYMBOL

MIN TYP MAX

(Note 1)

UNITS

C, E, M

SCLK High Time (Note 4)

CS Lag Time (Note 4) t

CSH2

240 ns

t

CH

190

CS Lead Time (Note 4)

Cycle Time (Note 4)

SCLK Frequency f

SCLK

ns

0 2.1 MHz

t

CH +tCL

480

t

CSS

240 ns

C, E, M

ns

C, E, M

C, E, M

C, E, M

C, E, M

CONDITIONS

MAX349/MAX350

Serially Controlled, Low-Voltage,

8-Channel/Dual 4-Channel Multiplexers

______________________________________________________________________________________

11

0

-5 -3 1

ON-RESISTANCE vs. V

COM

(DUAL SUPPLIES)

40

120

MAX349/350-TOC1

V

COM

(V)

R

ON

(Ω)

-1 3

80

140

20

100

60

5-4 0-2 2 4

V± = ±5V

V± = ±3V

V± = ±2.5V

110

30

-5 -3 1

ON-RESISTANCE vs. V

COM

AND TEMPERATURE

(DUAL SUPPLIES)

50

90

MAX349/350-TOC2

V

COM

(V)

R

ON

(Ω)

-1 3

70

100

40

80

60

5-4 0-2 2 4

V± = ±5.5V

TA = +125°C
TA = +85°C

TA = +25°C

TA = -55°C

0

04

ON-RESISTANCE vs. V

COM

(SINGLE SUPPLY)

100

300

MAX349/350-TOC3

V

COM

(V)

R

ON

(Ω)

8

200

400
350

50

250

150

210126

V+ = 3V

V+ = 12V

V+ = 5V

V+ = 2.5V

V- = 0V

V+ = 9V

180

02

ON-RESISTANCE vs. V

COM

AND TEMPERATURE

(SINGLE SUPPLY)

100

MAX349/350-TOC4

V

COM

(V)

R

ON

(Ω)

4

60

140

160

120

80

40

153

TA = +25°C

TA = -55°C

TA = +85°C

TA = +125°C

V+ = 5V
V- = 0V

0.1

OFF-LEAKAGE vs.

TEMPERATURE

1,000

MAX349/350-TOC5

TEMPERATURE (°C)

OFF-LEAKAGE (pA)

10

1

100

-50 12525-25 0 7550 100

V± = ±5.5V

0.1

ON-LEAKAGE vs.

TEMPERATURE

1,000

10,000

MAX349/350-TOC6

TEMPERATURE (°C)

ON-LEAKAGE (pA)

10

1

100

-50 12525-25 0 7550 100

V± = ±5.5V

__________________________________________Typical Operating Characteristics

(V+ = +5V, V- = -5V, GND = 0V, TA = +25°C, unless otherwise noted.)

-5 -3 1

CHARGE INJECTION vs. V

COM

-5

5

MAX349/350-TOC7

V

COM

(V)

V

CTE

(pC)

-1 3

-4

4

-3

3

-2

2

-1

1
0

5-4 0-2 2 4

A: V+ = 5V, V- = -5V
B: V+ = 5V, V- = 0V

A

B

-5 -3 1

TURN-ON/TURN-OFF TIMES vs. V

COM

0

250

MAX349/350-TOC8

V

COM

(V)

t

ON

, t

OFF

(ns)

-1 3

50

200

100

150

5-4 0-2 2 4

A = t

ON

A: V+ = 5V, V- = 5V
B: V+ = 5V, V- = 0V

A = t

OFF

B = t

OFF

B = t

ON

-50
04

DATA HOLD TIME vs.

POWER-SUPPLY VOLTAGE

-30

10

MAX349/350-TOC9

SUPPLY VOLTAGE (V)

DATA HOLD TIME (ns)

8

-10

30

40

50

20

-40

0

-20

26

MAX349/MAX350

Serially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers

12 ______________________________________________________________________________________

0

04

DATA SETUP TIME vs.

POSITIVE SUPPLY VOLTAGE

20

60

MAX349/350-TOC10

SUPPLY VOLTAGE (V)

DATA SETUP TIME (ns)

8

40

80

90

100

70

10

50

30

26

100

0.001

-50 125

POWER-SUPPLY CURRENT

vs. TEMPERATURE

10

1

MAX349/350-TOC11

TEMPERATURE (°C)

I+, I-, (µA)

25

0.1

0.01

-25 0 7550

100

V± = ±5.5V

I+

I-

10

04

MINIMUM SCLK PULSE WIDTH vs.

POSITIVE SUPPLY VOLTAGE

15

25

MAX349/350-TOC12

SUPPLY VOLTAGE (V)

SCLK (ns)

8

20

30

35

26

0

-100
10k 100k 10M 1G

FREQUENCY RESPONSE

-80

-20

MAX349/350 TOC13

FREQUENCY (Hz)

LOSS (dB)

PHASE (DEGREES)

1M 100M

-40

-60

20

-80

-100

-120

-60

0

-20

-40

PHASE

OFF ISOLATION

INSERTION LOSS

ISOLATION OF
A BARE SOCKET

V± = ±5V
50W IN AND OUT

0.01
10 100 1k 10k

TOTAL HARMONIC DISTORTION

vs. FREQUENCY

0.1

MAX349/350-TOC14

FREQUENCY (Hz)

TDH (%)

1

10

100

V± = ±5V
600Ω IN AND OUT

Typical Operating Characteristics (continued)

(V+ = +5V, V- = -5V, GND = 0V, TA = +25°C, unless otherwise noted.)

MAX349/MAX350

Serially Controlled, Low-Voltage,

8-Channel/Dual 4-Channel Multiplexers

______________________________________________________________________________________ 13

Pin Description

Note: NO and COM pins are identical and interchangeable. Either may be considered as an input or an output; signals pass equally

well in either direction.

• • •

• • •

• • •

• • •

• • •

SCLK

DIN

DOUT

COM-OUT

CS

t

DO

t

DH

t

DS

t

CSS

t

CH

t

CL

t

CSH2

tON,
t

OFF

• • •

Figure 1. Timing Diagram

1 Serial Clock Digital Input
2 Positive Analog Supply Voltage Input
3 Serial Data Digital Input

5 Common Analog Switch (mux output)

6–13 Normally Open Analog Switch Inputs 0–7

— Common Analog Switch “A” (mux output)
— Normally Open Analog Switch “A” Inputs 0–3
— Normally Open Analog Switch “B” Inputs 0–3
— Common Analog Switch “B” (mux output)

4

Ground. Connect to digital ground. (Analog signals have
no ground reference; they are limited to V+ and V-.)

1 SCLK
2 V+
3 DIN

5 COM

6–9, 11–14 NO0–NO7

— COMA
— NO0A–NO3A
— NO3B–NO0B
— COMB

4 GND

15

Negative Analog Supply Voltage Input. Connect to GND
for single-supply operation.

16 Serial Data Digital Output. Output high is V+.
17

RESET Input. Connect to logic high (or V+) for normal operation.
Drive low to set all switches off and set internal shift registers to 0.

18 Chip-Select Digital Input (Figure 1)

17 V­18 DOUT
19

RESET

20

CS

14 No Connect, not internally connected.10, 15, 16 N.C.

MAX349

SSOPDIP/SO

NAME FUNCTION

1
2
3

—
—

5

6–9

10–13

14

4

1
2
3

—
—

5

6–9

11–14

15

4

15
16
17
18

17
18
19
20

— 10, 16

MAX350

SSOPDIP/SO

PIN

MAX349/MAX350

Serially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers

14 ______________________________________________________________________________________

Detailed Description

Basic Operation

The MAX349/MAX350 are 8-channel and dual 4-chan­nel, serially controlled multiplexers (muxes). These
muxes are unusual in that any, all, or none of the input
channels can be directed to the output. All switches
are bidirectional, so inputs and outputs are inter­changeable. When multiple inputs are connected to an
output, they are also connected to one another, sepa­rated from each other only by the on-resistance of two
switches. Both parts require eight bits of serial data to
set all eight switches.

Serial Digital Interface

The MAX349/MAX350 interface can be thought of as an
8-bit shift register controlled by CS (Figure 2). While CS
is low, input data appearing at DIN is clocked into the
shift register synchronously with SCLK’s rising edge.
The input is an 8-bit word, each bit controlling one of
the eight switches (Tables 1 and 2). DOUT is the output
of the shift register, with data appearing synchronously
with SCLK’s falling edge. Data at DOUT is simply the
input data delayed by eight clock cycles.

When shifting the input data, D7 is the first bit in and
out of the shift register. While shifting data, the switches
remain in their previous configuration. When the eight
bits of data have been shifted in, CS is driven high.
This updates the new switch configuration and inhibits
further data from entering the shift register. Transitions
at DIN and SCLK have no effect when CS is high, and
DOUT holds the first input bit (D7) at its output.

More or fewer than eight clock cycles can be entered
during the CS low period. When this happens, the shift
register contains only the last eight serial data bits,
regardless of when they were entered. On the rising
edge of CS, all switches are set to the corresponding
states.

The MAX349/MAX350 three-wire serial interface is
compatible with SPI, QSPI, and MICROWIRE standards.
If interfacing with a Motorola processor serial interface,
set CPOL = 0. The MAX349/MAX350 are considered to
be slave devices (Figures 2 and 3). At power-up, the
shift register contains all zeros, and all switches are off.

The latch that drives the analog switch is updated on
the rising edge of CS, regardless of SCLK’s state. This
meets all SPI and QSPI requirements.

Daisy-Chaining

For a simple interface using several MAX349s and
MAX350s, “daisy-chain” the shift registers as shown in
Figure 5. The CS pins of all devices are connected,

and a stream of data is shifted through the MAX349s or
MAX350s in series. When CS is brought high, all
switches are updated simultaneously. Additional shift
registers may be included anywhere in series with the
MAX349/MAX350 data chain. Note that the DOUT high
level is V+, which may not be compatible with
TTL/CMOS devices if V+ differs from the logic supply
for these other devices.

Addressable Serial Interface

When several serial devices are configured as slaves,
addressable by the processor, DIN pins of each
decode logic individually control CS of each slave
device. When a slave is selected, its CS pin is driven
low, data is shifted in, and CS is driven high to latch the
data. Typically, only one slave is addressed at a time.
DOUT is not used.

Applications Information

8x1 Multiplexer

The MAX349 can be programmed normally, with only
one channel selected for every eight clock pulses, or it
can be programmed in a fast mode, where channel
changing occurs on each clock pulse.

In fast mode, select the channels by sending a single high
pulse (corresponding to the selected channel) at DIN, and
a corresponding CS low pulse for every eight clock puls­es. As SCLK clocks this through the register, each switch
sequences one channel at a time, starting with channel 0.

D7 D6 D5 D4

MSB

LSB

D3 D2 D1 D0

DATA BITS FROM PREVIOUS DATA INPUT

DOUT POWER-UP DEFAULT: D7–D0 = 0

D6 D5 D4 D3 D2 D1 D0

D7

DOUT

DIN

SCLK

SWITCHES UPDATED

DATA CLOCKED IN

DATA CLOCKED OUT

CS

D7

INPUT DATA BITS

Figure 2. 3-Wire Interface Timing

Table 2. MAX350 Serial-Interface Switch Programming

Serially Controlled, Low-Voltage,

8-Channel/Dual 4-Channel Multiplexers

MAX349/MAX350

______________________________________________________________________________________ 15

X = Don’t care. Data bit D7 is first bit in; data bit D0 is last in.

X1 Switch 0 open (off)X XX X

0

XX

X

MAX349 FUNCTION

XX XX1

1

X

DATA BITS

Switch 0 closed to COM

X

0

01

0

1

11

All switches open, D7–D0 = 0

Switch 7 open (off)

All switches closed to COM, D7–D0 = 1

All switches open, D7–D0 = 0

X

X1

X1

X1

1

1

Switch 6 open (off)

Switch 5 open (off)

Switch 6 closed to COM

Switch 7 closed to COM

X1

X1

X1

X1

Switch 4 open (off)

Switch 3 open (off)

Switch 4 closed to COM

Switch 5 closed to COM

X1

X1

X1

X1

Switch 2 open (off)

Switch 1 open (off)

Switch 2 closed to COM

Switch 3 closed to COM

D7

0

X

1

X

0

X

1

X

X

X

X

X

X

X

X

X

D6

0 0

XX

1

X

1

X

X

X

X

0

X

1

X

X

X

X

X

D4

X

X

0

X

X

X

X

X

1

X

X

X

X

D5

0 0

XX

1

X

1

X

X

X

X

X

X

X

X

0

X

1

X

D2

0 0

XX

1

X

1

RESET

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

D0

X

X

X

X

X

X

X

X

X

X

X

0

X

X

D1

X

X

0

X

X

X

X

X

1

D3

X XX XX1 X

1

Switch 1 closed to COMX

Table 1. MAX349 Serial-Interface Switch Programming

X1 Switch NO0A open (off)X XX X

0

XX

X

MAX350 FUNCTION

XX XX1

1

X

DATA BITS

Switch NO0A closed

X

0

01

0

1

11

All switches open, D7–D0 = 0

Switch NO0B open (off)

All “A” switches closed to COMA; All “B”
switches closed to COMB, D7–D0 = 1

All switches open, D7–D0 = 0

X

X1

X1

X1

1

1

Switch NO1B open (off)

Switch NO2B open (off)

Switch NO1B closed

Switch NO0B closed

X1

X1

X1

X1

Switch NO3B open (off)

Switch NO3A open (off)

Switch NO3B closed

Switch NO2B closed

X1

X1

X1

X1

Switch NO2A open (off)

Switch NO1A open (off)

Switch NO2A closed

Switch NO3A closed

D7

0

X

1

X

0

X

1

X

X

X

X

X

X

X

X

X

D6

0 0

XX

1

X

1

X

X

X

X

0

X

1

X

X

X

X

X

D4

X

X

0

X

X

X

X

X

1

X

X

X

X

D5

0 0

XX

1

X

1

X

X

X

X

X

X

X

X

0

X

1

X

D2

0 0

XX

1

X

1

RESET

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

D0

X

X

X

X

X

X

X

X

X

X

X

0

X

X

D1

X

X

0

X

X

X

X

X

1

D3

X XX XX1 X

1

Switch NO1A closed X

MAX349/MAX350

Serially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers

16 ______________________________________________________________________________________

SCLK

DIN

DOUT

CS

SK

SO

SI

I/O

MICROWIRE

PORT

MAX349
MAX350

THE DOUT-SI CONNECTION IS NOT REQUIRED FOR WRITING TO THE
MAX349/MAX350, BUT MAY BE USED FOR DATA-ECHO PURPOSES.

Figure 3. Connections for MICROWIRE

DOUT

DIN

SCLK

CS

MISO

MOSI

SCK

I/O

SPI

PORT

MAX349
MAX350

THE DOUT-MISO CONNECTION IS NOT REQUIRED FOR WRITING TO THE
MAX349/MAX350, BUT MAY BE USED FOR DATA-ECHO PURPOSES.

CPOL = 0, CPHA = 0

Figure 4. Connections for SPI and QSPI

SCLK

DIN

CS

MAX349
MAX350

SCLK

DIN

CS

MAX349
MAX350

SCLK

DIN

CS

MAX349
MAX350

DOUT DOUT DOUT

SCLK

DIN

CS

TO OTHER
SERIAL DEVICES

Figure 5. Daisy-Chained Connection

Dual, Differential 4-Channel Multiplexer

The MAX350 can be programmed normally, with only
one differential channel selected for every eight clock
pulses, or it can be programmed in a fast mode, where
channel changing occurs on each clock pulse.

In fast mode, select the channels by sending two high
pulses, spaced four clock pulses apart (corresponding
to the two selected channels) at DIN, and a corre­sponding CS low pulse for each of the first eight clock
pulses. As SCLK clocks this through the register, each
switch sequences one differential channel at a time,
starting with channel 0. Repeat this process for subse-

quent channel sequencing after the first eight bits have
been sent. For even faster channel sequencing, send
only one DIN high pulse and one CS

low pulse for

every four clock pulses.

Reset Function

RESET is the internal reset pin. It is usually connected
to a logic signal or V+. Drive RESET low to open all
switches and set the contents of the internal shift regis­ter to zero simultaneously. When RESET is high, the
part functions normally and DOUT is sourced from V+.
RESET must not be driven beyond V+ or GND.

Power-Supply Considerations

Overview

The MAX349/MAX350 construction is typical of most
CMOS analog switches. It has three supply pins: V+, V­and GND. V+ and V- are used to drive the internal
CMOS switches, and they set the limits of the analog
voltage on any switch. Reverse ESD-protection diodes
are internally connected between each analog signal
pin and both V+ and V-. If any analog signal exceeds
V+ or V-, one of these diodes will conduct. During normal
operation, these (and other) reverse-biased ESD diodes
leak, forming the only current drawn from V+ or V-.

Virtually all the analog leakage current is through the
ESD diodes. Although the ESD diodes on a given sig­nal pin are identical, and therefore fairly well balanced,
they are reverse biased differently. Each is biased by
either V+ or V- and the analog signal. This means their
leakages vary as the signal varies. The

difference

in the
two diode leakages to the V+ and V- pins constitutes
the analog signal-path leakage current. All analog leak­age current flows to the supply terminals, not to the
other switch terminal. This is why both sides of a given
switch can show leakage currents of either the same or
opposite polarity.

There is no connection between the analog signal
paths and GND.

V+ and GND power the internal logic and logic-level
translators, and set both the input and output logic lim­its. The logic-level translators convert the logic levels to
switched V+ and V- signals to drive the analog signal
gates. This drive signal is the only connection between
the logic supplies (and signals) and the analog sup­plies. V+ and V- have ESD-protection diodes to GND.
The logic-level inputs and output have ESD protection
to V+ and to GND.

The logic-level thresholds are CMOS and TTL compati­ble when V+ is +5V. As V+ rises, the threshold increases
slightly. Therefore, when V+ reaches +12V, the threshold
is about 3.1V; above the TTL-guaranteed high-level mini­mum of 2.8V, but still compatible with CMOS outputs.

MAX349/MAX350

Serially Controlled, Low-Voltage,

8-Channel/Dual 4-Channel Multiplexers

______________________________________________________________________________________ 17

FOUR CLOCK

PULSES

DIN

SCLK

D4

SW4

D0

SW0

Figure 7. Differential Multiplexer Input Control

CS

SCLK

DIN

MAX349
MAX350

CS

SCLK

DIN

MAX349
MAX350

CS

SCLK

DIN

MAX349
MAX350

TO OTHER
SERIAL
DEVICES

DIN

SCLK

CS1

CS2

CS3

Figure 6. Addressable Serial Interface

MAX349/MAX350

Serially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers

18 ______________________________________________________________________________________

Pin Configurations/Functional Diagrams (continued)

20
19
18
17
16
15
14
13

1
2
3
4
5
6
7
8

CS

TOP VIEW

RESET
DOUT
V-

GND

DIN

V+

SCLK

N.C.
N.C.
NO7
NO6

NO2

NO1

NO0

COM

12
11

9

10

NO5
NO4

N.C.

NO3

SSOP

MAX349

20
19
18
17
16
15
14
13

1
2
3
4
5
6
7
8

CS
RESET
DOUT
V-

GND

DIN

V+

SCLK

N.C.

N.C. = NOT INTERNALLY CONNECTED

COMB
NO0B
NO1B

NO2A

NO1A

NO0A

COMA

12
11

9

10

NO2B
NO3B

N.C.

NO3A

SSOP

LOGIC

LOGIC

MAX350

Bipolar Supplies

The MAX349/MAX350 operate with bipolar supplies
from ±3.0V and ±8V. The V+ and V- supplies need not
be symmetrical, but their sum cannot exceed the
absolute maximum rating of 17V. Do not connect the

MAX349/MAX350 V+ to +3V and connect the logic­level pins to TTL logic-level signals. This exceeds
the absolute maximum ratings and can damage the
part and/or external circuits.

Single Supply

The MAX349/MAX350 operate from single supplies
between +3V and +16V when V- is connected to GND.
All of the bipolar precautions must be observed.

High-Frequency Performance

In 50Ω systems, signal response is reasonably flat up
to 50MHz (see

Typical Operating Characteristics)

.
Above 20MHz, the on response has several minor
peaks that are highly layout dependent. The problem is
not turning the switch on, but turning it off. The off-state
switch acts like a capacitor and passes higher frequen­cies with less attenuation. At 10MHz, off-isolation is
about -45dB in 50Ω systems, becoming worse (approx­imately 20dB per decade) as frequency increases.
Higher circuit impedances also make off-isolation
worse. Adjacent channel attenuation is about 3dB
above that of a bare IC socket, and is entirely due to
capacitive coupling.

V-

NO0A

DIN

NO2A

0.120"

(3.05mm)

0.100"

(2.54mm)

NO3A NO3B

NO2B

COMB

NO0B

NO1B

V+

SCLK

CS

RESET DOUT

COMA

GND

NO1A

MAX349/MAX350

Serially Controlled, Low-Voltage,

8-Channel/Dual 4-Channel Multiplexers

______________________________________________________________________________________ 19

Ordering Information (continued)

* Contact factory for dice specifications.
** Contact factory for availability.

_________________Chip Topographies

TRANSISTOR COUNT: 500
SUBSTRATE CONNECTED TO V+.

20 SSOP-40°C to +85°CMAX350EAP

Dice*0°C to +70°CMAX350C/D

20 SSOP-40°C to +85°CMAX349EAP

18 CERDIP**-55°C to +125°CMAX350MJN

18 Wide SO-40°C to +85°CMAX350EWN

18 Plastic DIP-40°C to +85°CMAX350EPN

20 SSOP0°C to +70°CMAX350CAP

18 Wide SO

18 Plastic DIP0°C to +70°C

0°C to +70°CMAX350CWN

MAX350CPN

18 CERDIP**-55°C to +125°CMAX349MJN

18 Wide SO

18 Plastic DIP

PIN-PACKAGETEMP. RANGE

-40°C to +85°C

-40°C to +85°CMAX349EWN

MAX349EPN

PART

MAX349

MAX350

V-

NO0

DIN

NO2

0.120"

(3.05mm)

0.100"

(2.54mm)

NO3

NO4

NO5

NO7

NO6

V+

SCLK

CS

RESET

DOUT

COM

GND

NO1

MAX349/MAX350

Serially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

20

____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

© 1998 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

________________________________________________________Package Information

SSOP.EPS

SOICW.EPS