74F161A Philips Semiconductors, 74F161A Datasheet - Page 4

• Manufacturer Part Number: 74F161A
• Description: 4-bit binary counter
• Manufacturer: Philips Semiconductors

Philips Semiconductors
STATE DIAGRAM
74F161A MODE SELECT – FUNCTION TABLE
1996 Jan 29
CP
4-bit binary counters
MR
H
H
H
H
H
L
H H = Enable count
or
L L = Disable count
PE
CEP
CET
CP
SR
CP
X
X
X
D0
Q0 Q1 Q2 Q3
15
14
13
12
0
74F163A
D1 D2 D3
11
1
CEP
X
X
X
X
h
l
TC
INPUTS
10
2
CET
X
X
X
X
h
l
PE
CEP
CET
CP
SR
3
9
SF00664
D0
Q0 Q1 Q2 Q3
Figure 2. Synchronous multistage counting scheme
74F163A
D1 D2 D3
4
5
6
7
8
PE
X
h
h
h
l
l
TC
Dn
X
X
X
X
h
l
PE
CEP
CET
CP
SR
D0
Q0 Q1 Q2 Q3
4
count
74F163A
Qn
q
q
D1 D2 D3
H
L
L
n
n
OUTPUTS
APPLICATIONS
TC
TC
(1)
(1)
(1)
L
L
L
Figure 1. Maximum count modifying scheme
CLOCK
PE
CEP
CET
CP
SR
OPERATING MODE
OPERATING MODE
Reset (clear)
Parallel load
Parallel load
Count
Hold (do nothing)
Hold (do nothing)
+V
D0
Q0 Q1 Q2 Q3
CC
74F163A
D1 D2 D3
Terminal count = 6
PE
CEP
CET
CP
SR
74F161A, 74F163A
TC
D0
Q0 Q1 Q2 Q3
74F163A
D1 D2
PE
CEP
CET
CP
SR
D3
TC
SF00665
D0
Q0 Q1 Q2 Q3
Product specification
74F163A
D1 D2
D3
TC
SF00666