M74HC166
DESCRIPTION
PIN No
SYMBOL NAME AND FUNCTION
1 SI Serial Data Inputs
2, 3, 4, 5, 10, 11, 12, 14
A to H
Parallel Data Inputs
CLOCK INH
Clock Enable Input (Active Low)
CLOCK
Clock Input (LOW to HIGH, Edge Triggered
CLEAR
Asynchronous Master Reset Input (Active Low)
Serial Output from the Last Stage
SHIFT/LOAD
Parallel Enable Input (Active Low)
8 GND Ground (0V)
16 Vcc Positive Supply Voltage t(s)TRUTH TABLE uc INPUTS
INTERNAL OUTPUTS OUTPUTS rod CLEAR
SHIFT/ LOAD
CLOCK INH
CLOCK
SERIAL IN
PARALLEL A H
PL X X X X X L L L te L X X
NO CHANGE ole H L L
X a h a b h bs H H...
