74HC/HCT190 Philips Semiconductors (Acquired by NXP), 74HC/HCT190 Datasheet - Page 5

• Manufacturer Part Number: 74HC/HCT190
• Description: Presettable Synchronous BCD Decade Up/down Counter
• Manufacturer: Philips Semiconductors (Acquired by NXP)

Philips Semiconductors
FUNCTION TABLE
TC AND RC FUNCTION TABLE
Notes
1. H = HIGH voltage level
December 1990
parallel load
count up
count down
hold (do nothing)
OPERATING MODE
Presettable synchronous BCD decade
up/down counter
L
I
X = don’t care
U/D
H
H
H
L
L
L
= LOW voltage level
= LOW voltage level one set-up time prior to the LOW-to-HIGH CP transition
= LOW-to-HIGH CP transition
= one LOW level pulse
= TC goes LOW on a LOW-to-HIGH CP transition
INPUTS
CE
H
H
H
H
L
L
CP
X
X
X
X
Q
H
H
H
L
L
L
Fig.4 Functional diagram.
0
TERMINAL COUNT STATE
Q
X
X
X
L
L
L
1
5
PL
H
H
H
L
L
Q
U/D
X
X
X
L
L
L
X
X
H
X
L
2
INPUTS
CE
X
X
H
I
I
Q
H
H
H
L
L
L
3
CP
X
X
X
74HC/HCT190
TC
D
H
H
H
L
L
X
X
X
L
Product specification
n
OUTPUTS
OUTPUTS
Q
L
H
count up
count down
no change
n
RC
H
H
H
H