74ACT8244 Datasheet, PDF (1/7 Pages) STMicroelectronics – RELAY DRIVER IC

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:
V_CC(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
V_CC Positive Supply Voltage
TSSOP
ORDER CODES
PACKAGE
TSSOP
TUBE
PIN CONNECTION
T&R
74ACT8244TTR
June 2001
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