74ACT8244

® 74ACT8244 RELAY DRIVER IC s s s s s OPERATES 4 LATCHING RELAIS, 1 SINGLE SIDE STABLE RELAY AND 1 LED VERY LOW POWER CONSUMPTION TTL COMPATIBLE INPUT THRESHOLDS IMPROVED LATCH-UP IMMUNITY UP TO 300mA TSSOP-20 PACKAGE T (TSSOP Package) ORDER CODES : 74ACT8244TTR 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. PIN DESCRIPTION PIN No 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 SYMBOL RST IN1A IN1B IN2A IN2B IN3A IN3B IN4 IN5 GND NC OUT5 OUT4 OU3B OU3A OU2B OU2A OU1B OU1A VCC NAME AND F UNCTION Master Reset Input of 1st latched relay drv Input of 1st latched relay drv Input of 2nd latched relay drv Input of 2nd latched relay drv Input of 3rd latched relay drv Input of 3rd latched relay drv Input of 1st relay driver Input LED driver Ground Not Connected Output of LED driver Output of 1st relay driver Output 3rd latched relay drv Output 3rd latched relay drv Output 2nd latched relay drv Output 2nd latched relay drv Output 1st latched relay drv Output 1st latched relay drv Supply Voltage LOGIC DIAGRAM November 1999 1/6 74ACT8244 ABSOLUTE MAXIMUM RATINGS Symbol VCC VI VO IIK IOK IO ICC orIGND Tstg Supply Voltage DC Input Voltage DC Output Voltage DC Input Diode Current DC Output Diode Current DC Output Current DC VCC or Ground Current Storage Tempera...