74ACT8244
RELAY DRIVER IC

November 1999
n OPERATES4 LATCHING RELAIS, 1 SINGLE
SIDE STABLERELAY AND 1 LED
n VERY LOW POWER CONSUMPTION
n TTL COMPATIBLE INPUT THRESHOLDS
n IMPROVED LATCH-UP IMMUNITY UP TO
300mA
n 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.
LOGIC DIAGRAM
T
(TSSOP Package)
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
11 NC Not Connected
12 OUT5 Output of LED driver
13 OUT4 Output of 1st relay driver
14 OU3B Output 3rd latched relay drv
15 OU3A Output 3rd latched relay drv
16 OU2B Output 2nd latched relay drv
17 OU2A Output 2nd latched relay drv
18 OU1B Output 1st latched relay drv
19 OU1A Output 1st latched relay drv
20 V
CC
Supply Voltage
ORDER CODES :
74ACT8244TTR
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