Maxim MAX395CNG, MAX395C-D, MAX395EWG, MAX395ENG, MAX395CWG Datasheet

19-0448; Rev 0; 11/95

Serially Controlled, Low-Voltage,

8-Channel SPST Switch

_______________General Description

The MAX395 8-channel, serially controlled, single-pole/sin­gle-throw (SPST) analog switch offers eight separately
controlled switches. The switches conduct equally well in
either direction. On-resistance (100Ω max) is matched
between switches to 5Ω 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 switch
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 MAX395 is electrically
equivalent to two MAX391 quad switches controlled by a
serial interface, and is pin compatible with the MAX335.

The serial interface is compatible with SPI™/QSPI™ and

____________________________Features

♦ SPI™/QSPI™, Microwire™-Compatible Serial

Interface

♦ 8 Separately Controlled SPST Switches
♦ 100Ω Signal Paths with ±5V Supplies
♦ Rail-to-Rail Signal Handling
♦ Asynchronous RESET
♦ Pin Compatible with Industry-Standard MAX335
♦ ±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)

Input

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 MAX395s to be daisy chained.

All digital inputs have 0.8V to 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

__________________Pin Configuration

TOP VIEW

SCLK

1

V+

DIN
GND
NO0

COM0

NO1

COM1

NO2

COM2

NO3

COM3

SPI and QSPI are trademarks of Motorola, Inc. Microwire is a trademark of National Semiconductor Corp.

MAX395

2
3

LOGIC

4
5
6
7
8

9
10
11
12

DIP/SO

________________________________________________________________

24

CS

23

RESET

22

DOUT

21

V-

20

NO7

19

COM7

18

NO6

17

COM6

16

NO5

15

COM5

14

NO4

13

COM4

______________Ordering Information

PART

MAX395CNG
MAX395CWG
MAX395C/D 0°C to +70°C
MAX395ENG
MAX395EWG
MAX395MRG -55°C to +125°C

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

TEMP. RANGE PIN-PACKAGE

0°C to +70°C
0°C to +70°C

-40°C to +85°C 24 Narrow Plastic DIP

-40°C to +85°C

________________Functional Diagram

NO0

COM0

PARALLEL REGISTER AND TRANSLATOR

DIN

8-BIT SHIFT REGISTER

RESET

SCLK

CS



CLOCK TRANSLATOR

CS TRANSLATOR

Maxim Integrated Products

Call toll free 1-800-998-8800 for free samples or literature.

MAX395

24 Narrow Plastic DIP
24 Wide SO
Dice*

24 Wide SO
24 Narrow CERDIP**

NO7

COM7

DOUT

MAX395

LATCH

1

Serially Controlled, Low-Voltage,
8-Channel SPST Switch

ABSOLUTE MAXIMUM RATINGS

Voltages Referenced to GND

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

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

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

SCLK, CS

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

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

MAX395

Peak Current, NO_ or COM_

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

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.

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

Continuous Power Dissipation (T

Narrow Plastic DIP (derate 13.33mW/°C above +70°C)...1067mW

Wide SO (derate 11.76mW/°C above +70°C)...............941mW

Narrow CERDIP (derate 12.50mW/°C above +70°C)....1000mW

Operating Temperature Ranges

MAX395C_ G .......................................................0°C to +70°C

MAX395E_ G ....................................................-40°C to +85°C

MAX395MRG..................................................-55°C to +125°C

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

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

ELECTRICAL CHARACTERISTICS—Dual Supplies

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

SYMBOLPARAMETER

ANALOG SWITCH

Analog Signal Range
COM, NO On-Resistance

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

COM, NO On-Resistance
Flatness (Note 2)

NO Off Leakage Current
(Note 3)

COM Off Leakage Current
(Note 3)

COM On Leakage Current
(Note 3)

DIGITAL I/O

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

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

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

DOUT Output Voltage Logic High
DOUT Output Voltage Logic Low
SCLK Input Hysteresis

COM

R

ON

∆R

ON

R

FLAT(ON)

I

NO(OFF)

I

COM(OFF)

COM(ON)

IH

IL

IH, IIL

DOUT
DOUT

to T

MIN

MAX

, V

NO

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

= ±3V, INO= 1mA

COM

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

= ±3V, INO= 1mA

COM

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

= -3V, 0V, 3V

COM

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

= -4.5V, VNO= 4.5V

COM

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

= 4.5V, VNO= -4.5V

COM

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

= -4.5V, VNO= 4.5V

COM

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

= 4.5V, VNO= -4.5V

COM

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

= VNO= ±4.5V

COM

V

, V

DIN

SCLK

VCS= 0.8V or 2.4V
I

= 0.8mA

DOUT

I

= -1.6mA

DOUT

HYST

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

CONDITIONS UNITS

C, E, M
TA= +25°C
C, E, M
TA= +25°C 5
C, E, M
TA= +25°C 10
C, E, M
TA= +25°C -0.1 0.002 0.1
C, E, M
TA= +25°C -0.1 0.002 0.1
C, E, M
TA= +25°C -0.1 0.002 0.1
C, E, M
TA= +25°C 0.1 0.002 0.1
C, E, M
TA= +25°C -0.2 0.01 0.2
C, E, M

C, E, M

C, E, M

,

C, E, M
C, E, M

C, E, M
C, E, M

= +70°C)

A

MIN TYP MAX

(Note 1)

60 100

125

10

15

-10 10

-10 10

-10 10

-10 10

-20 20

VV- V+V

Ω

Ω

Ω

nA

nA

nAI

V2.4V

V0.8V

µA-1 0.03 1I

V2.8 V+V
V0 0.4V

mV100SCLK

2 _______________________________________________________________________________________

Serially Controlled, Low-Voltage,

8-Channel SPST Switch

ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)

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

SYMBOLPARAMETER

SWITCH DYNAMIC CHARACTERISTICS

Turn-On Time

Turn-Off Time
Break-Before-Make Delay

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

Switch On Capacitance

Off Isolation

Channel-to-Channel Crosstalk

POWER SUPPLY

t

ON

t

OFF

t

BBM

V

CTE

C

NO(OFF)

COM(OFF)

C

(ON)

ISO

CT

I+V+ Supply Current

I-V- Supply Current

to T

MIN

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

MAX

CONDITIONS

From rising edge of CS

From rising edge of CS ns
From rising edge of CS

CL= 1nF, VNO= 0V, RS= 0Ω
VNO= GND, f = 1MHz
V

= GND, f = 1MHzC

COM

V

= VNO= GND,

COM

f = 1MHz
RL= 50Ω, CL= 15pF,

VNO= 1V
RL= 50Ω, CL= 15pF,

VNO= 1V

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

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

, f = 100kHz

RMS

, f = 100kHz

RMS

TA= +25°C 200 400
C, E, M
TA= +25°C 90 400
C, E, M
TA= +25°C 515
T

= +25°C

A

T

= +25°C 2

A

TA= +25°C
TA= +25°C

TA= +25°C

TA= +25°C

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

MIN TYP MAX

(Note 1)

500

500

210

2
8

-90

<-90 dBV

720

30

-1 0.1 1

-2 2

MAX395

UNITS

ns

ns

pC

pF
pF

pF

dBV

V±3 ±8V+, V-Power-Supply Range

µA

µA

_______________________________________________________________________________________ 3

Serially Controlled, Low-Voltage,
8-Channel SPST Switch

TIMING CHARACTERISTICS—Dual Supplies (Figure 1)

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

PARAMETER SYMBOL

SERIAL DIGITAL INTERFACE

SCLK Frequency f
Cycle Time

MAX395

CS Lead Time
CS Lag Time t
SCLK High Time

SCLK Low Time
Data Setup Time t
Data Hold Time
DIN Data Valid after Falling SCLK

(Note 4)
Rise Time of DOUT (Note 4) t
Allowable Rise Time at DIN, SCLK

(Note 4)
Fall Time of DOUT (Note 4) t
Allowable Fall Time at DIN, SCLK

(Note 4)
RESET Minimum Pulse Width t

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

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

= R

ON

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.

ON(max)

- R

ON(min)

SCLK

t

CH +tCL

t

CSS

CSH2

t

CH

t

CL
DS

t

DH

t

DO

DR

t

SCR

DF

t

SCF

RW

. On-resistance match between channels and on-resistance flatness are guaranteed only with

10VCOM/VNO

to T

MIN

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

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

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

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

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

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

MAX

CONDITIONS

, V

= output. NO = input to off switch.

COM

C, E, M
C, E, M
C, E, M

C, E, M
C, E, M
C, E, M
C, E, M
C, E, M

TA= +25°C
C, E, M

C, E, M

C, E, M

C, E, M

C, E, M

MIN TYP MAX

(Note 1)

0 2.1nsMHz
480
240 ns

240 ns
190
190 ns
200 17 ns

0 -17

85

70 nsTA= +25°C

UNITS

400
100 ns

2 µs

100 ns

2 µs

ns

ns
ns

4 _______________________________________________________________________________________

Serially Controlled, Low-Voltage,

8-Channel SPST Switch

ELECTRICAL CHARACTERISTICS—Single +5V Supply

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

PARAMETER SYMBOL

ANALOG SWITCH

Analog Signal Range
COM, NO On-Resistance R

NO Off Leakage Current
(Notes 4, 5)

COM Off Leakage Current
(Notes 4, 5)

COM On Leakage Current
(Notes 4, 5)

DIGITAL I/O

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

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

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

DOUT Output Voltage Logic High
DOUT Output Voltage Logic Low V
SCLK Input Hysteresis SCLK

SWITCH DYNAMIC CHARACTERISTICS

Turn-On Time t

Turn-Off Time t
Break-Before-Make Delay t

Charge Injection (Note 4) V
Off Isolation (Note 6) V

Channel-to-Channel Crosstalk
(Note 7)

POWER SUPPLY

V+, V- Supply Current I+

to T

MIN

COM,VNO

ON

I

NO(OFF)

I

COM(OFF)

I

COM(ON)

V

IH

V

IL

IIH, I
V

DOUT
DOUT

HYST

ON

OFF

BBM

CTE

ISO

V

CT

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

MAX

CONDITIONS

V+ = 5V, V
INO= 1mA

V+ = 5.5V, V
VNO= 0V

V+ = 5.5V, V
VNO= 4.5V

V+ = 5.5V, V
VNO= 0V

V+ = 5.5V, V
VNO= 4.5V

COM

COM

COM

COM

COM

= 3.5V,

= 4.5V,

= 0V,

= 4.5V,

= 0V,

V+ = 5.5V,
V

= VNO= 4.5V

COM

V

, V

IL

VCS= 0.8V or 2.4V
I

DOUT
DOUT

DIN

,

SCLK

= -0.8mA C, E, M
= 1.6mA C, E, M

From rising edge of CS

From rising edge of CS
From rising edge of CS

CL= 1nF, VNO= 0V, RS= 0Ω
RL= 50Ω, CL= 15pF,

VNO= 1V

, f = 100kHz

RMS

RL= 50Ω, CL= 15pF,
VNO= 1V

, f = 100kHz

RMS

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

MIN TYP MAX

(Note 2)

C, E, M

V- V+

125 175TA= +25°C

C, E, M

225

-0.1 0.002 0.1TA= +25°C

C, E, M

-10 10

-0.1 0.002 0.1TA= +25°C

C, E, M

-10 10

-0.1 0.002 0.1TA= +25°C

C, E, M

-10 10

-0.1 0.002 0.1TA= +25°C

C, E, M

-10 10

-0.2 0.002 0.2TA= +25°C

-20 20C, E, M

C, E, M

C, E, M

C, E, M

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

TA= +25°C

TA= +25°C

TA= +25°C

2.4

0.8

-1 0.03 1

200 400

500

90 400

500

15 ns

210pC

-90 dB

<-90 dB

720

C, E, M 30

MAX395

UNITS

VV

Ω

nA

nA

nA

V

V

µA

V2.8 V+
V0 0.4I

mV100C, E, M

ns

ns

µA

_______________________________________________________________________________________ 5