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74ACT8244

RELAY DRIVER IC

STMicroelectronics 

74ACT8244

RELAY DRIVER IC

s OPERATES 4 LATCHES RELAIS, 1 SINGLE

SIDE STABLE RELAY AND 1 LED

s VERY LOW POWER CONSUMPTION

s TTL COMPATIBLE INPUT THRESHOLDS

s IMPROVED LATCH-UP IMMUNITY UP TO

300mA

s OPERATING VOLTAGE RANGE:

VCC(OPR) = 4.25V to 5.25V

s AVAILABLE IN TSSOP-20 PACKAGE

DESCRIPTION

The device is a relais driver for line card

application. It is able to operate four latching

relais, one single side stable relay and one LED

connected either to GND or VCC. All the outputs

can be set to LOW with the RST input as shown in

the true table. All inputs and outputs are equipped

with protection circuits against static discharge,

giving them 2KV ESD immunity and transient

excess voltage.

PIN DESCRIPTION

PIN No SYMBOL

NAME AND FUNCTION

1

RST Master Reset

2

IN1A Input of 1st latched relay drv

3

IN1B Input of 1st latched relay drv

4

IN2A Input of 2nd latched relay drv

5

IN2B Input of 2nd latched relay drv

6

IN3A Input of 3rd latched relay drv

7

IN3B Input of 3rd latched relay drv

8

IN4 Input of 1st relay driver

9

IN5 Input LED driver

10

GND Ground (0V)

11

NC Not Connected

12

OUT5 Output LED driver

13

OUT4 Output of 1st relay driver

14

OU3B Output of 3rd latched relay drv

15

OU3A Output of 3rd latched relay drv

16

OU2B Output of 2nd latched relay drv

17

OU2A Output of 2nd latched relay drv

18

OU1B Output of 1st latched relay drv

19

OU1A Output of 1st latched relay drv

20

VCC Positive Supply Voltage

TSSOP

ORDER CODES

PACKAGE

TSSOP

TUBE

PIN CONNECTION

T&R

74ACT8244TTR

June 2001

1/7

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