74HC163 Philips, 74HC163 Datasheet - Page 4

• Manufacturer Part Number: 74HC163
• Description: Presettable synchronous 4-bit binary counter synchronous reset
• Manufacturer: Philips

Philips Semiconductors
FUNCTION TABLE
Notes
1. The TC output is HIGH when CET is HIGH and the counter is at terminal count (HHHH).
December 1990
reset (clear)
parallel load
count
hold
(do nothing)
Presettable synchronous 4-bit binary
counter; synchronous reset
H = HIGH voltage level
h = HIGH voltage level one set-up time prior to the LOW-to-HIGH CP transition
L = LOW voltage level
I = LOW voltage level one set-up time prior to the LOW-to-HIGH CP transition
q = lower case letters indicate the state of the referenced output one set-up time prior to the
X = don’t care
= LOW-to-HIGH CP transition
LOW-to-HIGH CP transition
OPERATING MODE
I
h
h
h
h
h
MR
Fig.4 Functional diagram.
X
X
CP
X
X
X
h
I
X
4
CEP
INPUTS
X
X
X
h
X
I
CET
X
I
I
h
h
h
PE
X
I
h
X
X
X
D
n
74HC/HCT163
L
L
H
count
q
q
n
n
Product specification
Q
OUTPUTS
n
L
L
(1)
(1)
(1)
L
TC