DESCRIPTION
All inputs are equipped with protection circuits against static discharge and transient excess voltage. INPUT AND OUTPUT EQUIVALENT CIRCUIT NC = No Internal Connection March 1993 1/10 M54/M74HC279 PIN DESCRIPTION
PIN No SYMBOL 1, 5, 10. 14 1R to 4R 2, 3, 6, 11, 1S1, 1S2, 2S, 12, 15 3S1, 3S2, 4S 4, 7, 9, 13 1Q to 4Q 8 GND 16 V CC NAME AND FUNCTION Reset Inputs (Active LOW) Set Inputs (Active LOW) Outputs Ground (0V) Positive Supply Voltage IEC LOGIC SYMBOL TRUTH TABLE S # H L H L R H H L L Q Q0 H L H NOTE: Q0 = THE LEVEL OF Q BEFORE THE INDICRTED INPUT CONDITION WAS ESTABLISHED. # FOR LATCHES WITH DOUBLE S INPUT: H = BOTH S INPUTS HIGH L = ONE OF BOTH INPUTS LOW LOGIC DIAGRAM ABSOLUTE MAXIMUM RATINGS
Symbol VCC VI VO IIK IOK IO ICC or IGND PD Tstg TL Supply Voltage DC Input Voltage DC Output Voltage DC Input Diode Current DC Output Diode Current DC Output Source Sink Current Per Output Pin DC VCC or Ground Current Power Dissipation Storage Temperature Lead Temperature (10 se...
STMicroelectronics
