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