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MC74HC160ADR2G

P1-P3P4-P6P7-P9P10-P12
MC74HC160A
http://onsemi.com
7
SWITCHING WAVEFORMS
Figure 3. Figure 4.
Figure 5.
Figure 6.
Figure 7.
TEST CIRCUIT
Figure 8.
t
r
t
f
V
CC
GND
t
THL
t
TLH
ANY
OUTPUT
90%
50%
10%
90%
50%
10%
CLOCK
t
PLH
t
PHL
50%
t
PHL
V
CC
GND
V
CC
GND
ANY
OUTPUT
CLOCK
RESET
50%
50%
t
rec
t
r
t
f
V
CC
GND
t
PHL
t
PLH
90%
50%
10%
90%
50%
10%
t
THL
t
TLH
ENABLE T
RIPPLE
CARRY
OUT
INPUTS
P0, P1,
P2, P3
50%
V
CC
GND
V
CC
GND
GND
50%
50%
LOAD
CLOCK
V
CC
GND
V
CC
GND
ENABLE T
OR
ENABLE P
50%
50%
CLOCK
*Includes all probe and jig capacitance
C
L
*
TEST POINT
DEVICE
UNDER
TEST
OUTPUT
V
CC
t
w
1/fmax
t
w
VALID
t
su
t
h
t
su
t
h
t
rec
VALID
t
su
t
h
MC74HC160A
http://onsemi.com
8
MC74HC160A
BCD Counter with Asynchronous Reset
P0
P1
P2
P3
ENABLE P
ENABLE T
RESET
CLOCK
LOAD
R
C
T0
R
C
C
LOAD
LOAD
P0
Q0 Q0
Q1
Q2
Q3
RIPPLE
CARRY
OUT
V
CC
= PIN 16
GND = PIN 8
14
The flip−flops shown in the circuit diagrams are Toggle−Enable flip−flops. A Toggle−
Enable flip−flop is a combination of a D flip−flop and a T flip−flop. When loading data from
Preset inputs P0, P1, P2, and P3, the Load signal is used to disable the Toggle input (Tn) of
the flip−flop. The logic level at the Pn input is then clocked to the Q output of the flip−flop
on the next rising edge of the clock.
A logic zero on the Reset device input forces the internal clock (C) high and resets the Q
output of the flip−flop low.
C
LOAD
LOAD
Q0
Q1
Q1
Q2
Q2
Q3
Q3
T1
R
C
C
LOAD
LOAD
P1
T2
R
C
C
LOAD
LOAD
P2
T3
R
C
C
LOAD
LOAD
P3
13
12
11
15
3
4
5
6
7
10
1
2
3
MC74HC160A
http://onsemi.com
9
Figure 9. MC74HC160A Timing Diagram
Sequence illustrated in waveforms:
1. Reset outputs to zero.
2. Preset to BCD seven.
3. Count to eight, nine, zero, one, two, and three.
4. Inhibit.
RESET (HC160A)
LOAD
P0
P1
P2
P3
CLOCK
(HC160A)
CLOCK
(HC162A)
ENABLE P
ENABLE T
Q0
Q1
Q2
Q3
RIPPLE
CARRY
OUT
(ASYNCHRONOUS)
789012 3
RESET LOAD
COUNT
ENABLES
OUTPUTS
PRESET
DATA
INPUTS
INHIBITCOUNT
P1-P3P4-P6P7-P9P10-P12

MC74HC160ADR2G

Mfr. #:
Buy MC74HC160ADR2G
Manufacturer:
ON Semiconductor
Description:
Counter Shift Registers IC COUNTER 4-BIT SYNC
Lifecycle:
New from this manufacturer.
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