74HCT401 Philips, 74HCT401 Datasheet - Page 4

• Manufacturer Part Number: 74HCT401
• Description: 8-bit synchronous BCD down counter
• Manufacturer: Philips

Philips Semiconductors
FUNCTION TABLE
Notes
1. Clock connected to CP.
2. Synchronous operation: changes occur on the LOW-to-HIGH CP transition.
3. Jam inputs: MSD = P
December 1990
8-bit synchronous BCD down counter
H = HIGH voltage level
L = LOW voltage level
X = don’t care
MR
H
H
H
H
L
CONTROL INPUTS
PL
H
H
H
X
L
7
, LSD = P
PE
H
H
X
X
L
0
.
TE
H
X
X
X
L
Fig.4 Functional diagram.
PRESET MODE
synchronous
asynchronous
4
ACTION
inhibit counter
count down
preset on next LOW-to HIGH clock transition
preset asynchronously
clear to maximum count
74HC/HCT40102
Product specification