74HC40102 Datasheet, PDF (4/11 Pages) NXP Semiconductors – 8-bit synchronous BCD down counter

Philips Semiconductors
8-bit synchronous BCD down counter
Product specification
74HC/HCT40102
Fig.4 Functional diagram.
FUNCTION TABLE
CONTROL INPUTS
PRESET MODE ACTION
MR
PL
PE
TE
H
H
H
H
inhibit counter
H
H
H
L
synchronous
count down
H
H
L
X
preset on next LOW-to HIGH clock transition
H
L
L
X
X
X
preset asynchronously
asynchronous
X
X
clear to maximum count
Notes
1. Clock connected to CP.
2. Synchronous operation: changes occur on the LOW-to-HIGH CP transition.
3. Jam inputs: MSD = P₇, LSD = P₀.
H = HIGH voltage level
L = LOW voltage level
X = don’t care
December 1990
4