Harman Kardon AVR247 - Page 169

74LCX74
2/11
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
TRUTH TABLE
X : Don’t Care
PIN No SYMBOL NAME AND FUNCTION
1, 13 1CLR, 2CLR Asynchronous Reset - Direct Input
2, 12 1D, 2D Data Inputs
3, 11 1CK, 2CK Clock Input (LOW to HIGH, Edge Triggered)
4, 10 1PR, 2PR Asynchronous Set - Direct Input
5, 9 1Q, 2Q True Flip-Flop Outputs
6, 8 1Q, 2Q Complement Flip-Flop Outputs
7 GND Ground (0V)
14 V
CC
Positive Supply Voltage
INPUTS OUTPUTS
FUNCTION
CLR PR D CK Q Q
L H X X L H CLEAR
H L X X H L PRESET
LLXXHH
HHL LH
HHH HL
HHX
Q
n
Q
n
NO CHANGE
169
AVR247 harman/kardon