MC54HCT163A Motorola, MC54HCT163A Datasheet - Page 6

• Manufacturer Part Number: MC54HCT163A
• Description: (MC54HCT161A / MC54HCT163A) PRESETTABLE COUNTERS HIGH-PERFORMANCE SILICON-GATE CMOS
• Manufacturer: Motorola

MOTOROLA
MC54/74HCT161A MC54/74HCT163A
Enable P
Enable T
P 0
P 1
P 2
P 3
Reset
Clock
Load
3
4
5
6
7
10
1
9
2
Figure 8. 4–Bit Binary Counter with Asynchronous Reset (MC54/74HCT161A)
R
Load
Load
C
C
Enable flip–flops. A Toggle–Enable flip–flop is a combina-
tion of a D flip–flop and a T flip–flop. When loading data
from Preset inputs P 0 , P 1 , P 2 and P 3 , the Load signal is
used to disable the Toggle input (T n ) of the flip–flop. The
logic level at the P n input is then clocked to the Q output of
the flip–flop on the next rising edge of the clock.
clock (C) high and resets the Q output of the flip–flop low.
6
The flip–flops shown in the circuit diagrams are Toggle–
A logic zero on the Reset device input forces the internal
T0
R
C
C
Load
Load
P0
T1
R
C
C
Load
Load
P1
T2
R
C
C
Load
Load
P2
T3
R
C
C
Load
Load
P3
Q0
Q0
Q1
Q1
Q2
Q2
Q3
High–Speed CMOS Logic Data
DL129 — Rev 6
14
13
12
15 Ripple
11
Q 0
Q 1
Q 2
Q 3
Carry Out