DESCRIPTION
These 8 bit D-Type flip-flops are controlled by a clock input (CK) and an output enable input (OE). PIN CONNECTION AND IEC LOGIC SYMBOLS April 1997 1/10 74ACT374 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION
PIN No 1 2, 5, 6, 9, 12, 15, 16, 19 3, 4, 7, 8, 13, 14, 17, 18 11 10 20 SYMBOL OE Q0 to Q7 NAME AND F UNCTIO N 3 State Output Enable Input (Active LOW) 3 State Outputs D0 to D7 Data Inputs CLOCK GND VCC Clock Input (LOW to HIGH, edge triggered) Ground (0V) Positive Supply Voltage TRUTH TABLE INPUT S OE H L L L X: DON’T CARE Z: HIGH IMPEDANCE OUT PUT S D X X L H Q Z NO CHANGE L H CK X LOGIC DIAGRAMS 2/10 74ACT374 ABSOLUTE MAXIMUM RATINGS
Symbol VCC VI VO IIK IOK IO Tstg TL Supply Voltage DC Input Voltage DC Output Voltage DC Input Diode Current DC Output Diode Current DC Output Current Storage Temperature Lead Temperature (10 sec) Parameter Value -0.5 to +7 -0.5 to VCC + 0.5 -0.5 to VCC + 0.5 ± 20 ± 20 ± 50 ± 400 -65 to +150 300 Unit V V V mA mA mA mA o o ICC or IGND DC VCC or Ground Current C C ABSOLUTE MAXIMUM RATINGS
are those values beyond which damage to the device may occur.
STMicroelectronics
