HIT HD74HC162, HD74HC161 Datasheet

HD74HC160/HD74HC161/

HD74HC162/HD74HC163

Synchronous Decade Counter (Direct Clear)

Synchronous 4-bit Binary Counter (Direct Clear)

Synchronous Decade Counter (Synchronous Clear)

Synchronous 4-bit Binary Counter (Synchronous Clear)

Description

The HD74HC160 and the HD74HC162 are 4 bit decade counters, and the HD74HC161 and the
HD74HC163 are 4 bit binary counters All flip-flops are clocked simultaneously on the low to high to
transition (positive edge) of the clock input waveform.

These counters may be preset using the load input. Presetting of all four flip-flops is synchronous to thte
rising edge of clock. When load is held low counting is disabled and the data on the A, B, C, and D inputs
is loaded into the counter on the rising edge of clock. If the load input is taken high before the positive
edge of clock the count operation will be unaffected.

All of these counters may be cleared by utilizing the clear input. The clear function on the HD74HC162
and HD74HC163 counters are synchronous to the clock. That is, the counters are cleared on the positive
edge of clock while the clear input is held low.

The HD74HC160 and HD74HC161 counters are cleared asynchronously. When the clear is taken low the
counter is cleared immediately regardless of the clock.

Two active high enable inputs Enable P and Enable T and a ripple carry output are provided to enable easy
cascading of counters. Both enable inputs must be high to count. The Enable T input also enables the
Ripple Carry output. When enabled, the Ripple Carry outputs a positive pulse when the counter overflows.
This pulse is approximately equal in duration to the high level portion of the QA outputs. The Ripple Carry
output is fed to successive cascaded stages to facilitate easy implementation of N-bit counters.

Features

• High Speed Operation: tpd (Clock to Q) = 18 ns typ (CL = 50 pF)

• High Output Current: Fanout of 10 LSTTL Loads

• Wide Operating Voltage: VCC = 2 to 6 V

• Low Input Current: 1 µA max

HD74HC160/HD74HC161/HD74HC162/HD74HC163

• Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)

Function Table

Inputs Outputs
Clock Clear*

Note: 1. 162 and 163 Only-160 and 161 are Asynchronous Clear Devices

Asynchronous clear HD74HC160P HD74HC161P
Synchronous clear HD74HC162P HD74HC163P

1

L X X X Reset-clear
H L X X Load input data
H H H H Count
H H L X No count
H H X L No count

Pin Arrangement

Load Enable P Enable T Q

Decade Counter Binary Counter

n

Clear

Clock

Data
Inputs

Enable P

GND

V

1

2

3

A

4

B

5

C

6

D

7

8

CLR

CK

A

B

C

D

P

Load

(Top view)

Ripple
Carry

Q

QB

QC

QD

T

A

16

CC

Ripple

15

Carry Output

14

QA

13

QB

12

QC

11

QD

10

Enable T

9

Load

Outputs

2

HD74HC160/HD74HC161/HD74HC162/HD74HC163

DC Characteristics

Ta = –40 to

Ta = 25°C

Item Symbol V

Input voltage V

IH

(V) Min Typ Max Min Max Unit Test Conditions

CC

2.0 1.5 — — 1.5 — V

4.5 3.15 — — 3.15 —

6.0 4.2 — — 4.2 —

V

IL

2.0 — — 0.5 — 0.5 V

4.5 — — 1.35 — 1.35

6.0 — — 1.8 — 1.8

Output voltage V

OH

2.0 1.9 2.0 — 1.9 — V Vin = VIH or VILIOH = –20 µA

4.5 4.4 4.5 — 4.4 —

6.0 5.9 6.0 — 5.9 —

4.5 4.18 — — 4.13 — IOH = –4 mA

6.0 5.68 — — 5.63 — IOH = –5.2 mA

V

OL

2.0 — 0.0 0.1 — 0.1 V Vin = VIH or VILIOL = 20 µA

4.5 — 0.0 0.1 — 0.1

6.0 — 0.0 0.1 — 0.1

4.5 — — 0.26 — 0.33 IOL = 4 mA

6.0 — — 0.26 — 0.33 IOL = 5.2 mA
Input current Iin 6.0 — — ±0.1 — ±1.0 µA Vin = VCC or GND
Quiescent supply

I

CC

6.0 — — 4.0 — 40 µA Vin = VCC or GND, Iout = 0 µA
current

+85°C

3

HD74HC160/HD74HC161/HD74HC162/HD74HC163

AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns)

Ta = –40 to

Ta = 25°C

Item Symbol V

Maximum clock f

max

(V) Min Typ Max Min Max Unit Test Conditions

CC

2.0 — — 5 — 4 MHz
frequency 4.5 — — 25 — 20

6.0 — — 29 — 23
Propagation delay t
time t

PLH

PHL

2.0 — — 160 — 200 ns Clock to Q

4.5 — 18 32 — 40

6.0 — — 27 — 34

2.0 — — 225 — 280 ns Clear to Q

4.5 — 23 45 — 56 (HC160, HC161 only)

6.0 — — 38 — 48

2.0 — — 150 — 190 ns Enable T to Ripple Carry output

4.5 — 15 30 — 38

6.0 — — 26 — 33

2.0 — — 200 — 250 ns Clock to Ripple carry output

4.5 — 16 40 — 50

6.0 — — 34 — 43
Setup time t

su

2.0 125 — — 156 — ns Data to Clock

4.5 25 9 — 31 —

6.0 21 — — 26 —

2.0 125 — — 156 — Load to Clock

4.5 25 15 — 31 —

6.0 21 — — 26 —

2.0 125 — — 156 — Clear to Clock

4.5 25 — — 31 — (HC162, HC163 only)

6.0 21 — — 26 —
Hold time t

h

2.0 0 — — 0 — ns

4.5 0 –7 — 0 —

6.0 0 — — 0 —
Removal time t

rem

2.0 100 — — 125 — ns

4.5 20 7 — 25 —

6.0 17 — — 21 —

+85°C

4

HD74HC160/HD74HC161/HD74HC162/HD74HC163

AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns) (cont)

Ta = –40 to

Ta = 25°C

Item Symbol V

Pulse width t

w

(V) Min Typ Max Min Max Unit Test Conditions

CC

2.0 80 — — 100 — ns

4.5 16 6 — 20 —

6.0 14 — — 17 —
Output rise/fall t
time t

TLH

THL

2.0 — — 75 — 95 ns

4.5 — 5 15 — 19

6.0 — — 13 — 16
Input capacitance Cin — — 5 10 — 10 pF

Function Table

Count Enable/Disable

+85°C

Control Inputs Result at Outputs
Load Enable P Enable T Q

to Q

A

D

Ripple Carry Output

H H H Count High when QA to QD are maximum
L H H No count
X L H No count High when QA to QD are maximum
X H L No count L
X L L No count L

5