74VHC574
DESCRIPTION
The 74VHC574 is an advanced high-speed CMOS OCTAL D-TYPE FLIP FLOP with 3 STATE OUTPUT NON INVERTING fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology. This 8 bit D-Type flip-flop is controlled by a clock input (CK) and an output enable input (OE). On the positive transition of the clock, the Q outputs will be set to logic states that were setup PIN CONNECTION AND IEC LOGIC SYMBOLS
June 1999
1/10
INPUT EQUIVALENT CIRCUIT PIN DESCRIPTION
PIN No 1 2, 3, 4, 5, 6, 7, 8, 9 12, 13, 14, 15, 16, 17, 18, 19 11 10 20 SYMBOL OE D0 to D7 NAME AND FUNCT ION 3 State Output Enable Input (Active LOW) Data Inputs
Q0 to Q7
3 State Outputs
CLOCK GND VCC
Clock Input (LOW to HIGH, edge triggered) Ground (0V) Positive Supply Voltage
TRUTH TABLE
INPUTS OE H L L L
X:Don’t Care Z: High Impedance
OUT PUTS D X X L H Q Z NO CHANGE L H
CK X
LOGIC DIAGRAM
2/10
ABSOLUTE MAXIMUM RATINGS
Symbol VCC VI VO IIK IOK IO Tstg TL Supply Voltage...
