Nexperia

74HC161

Presettable synchronous 4-bit binary counter; asynchronous reset

3. Ordering information

Table 1. Ordering information

Package

Type number

Temperature range Name

Description

Version

74HC161D

-40 °C to +125 °C

SO16

plastic small outline package; 16 leads; body width 3.9 mm SOT109-1

74HC161PW

-40 °C to +125 °C

TSSOP16 plastic thin shrink small outline package; 16 leads;

body width 4.4 mm

SOT403-1

4. Functional diagram

mna905

Q0

Q1

CP

Q2

Q3

TC

3

4

2

5

6

9

14

13

15

12

11

MR

1

CEP

7

CET

10

D0

D1

D2

D3

PE

Fig. 1. Logic symbol

mna906

15

11

12

3

4

5

6

14

13

7

10

G3

1

R

9

M1

G4

2

C2/1,3,4+

1,2D

4 CT = 15

CTR4

Fig. 2. IEC logic symbol

mna907

PARALLEL LOAD

CIRCUITRY

BINARY

COUNTER

CEP

TC

15

CET

PE

CP

MR

Q0 Q1 Q2 Q3

D0 D1 D2 D3

14 13 12 11

3

4

5

6

7

10

9

2

1

Fig. 3. Functional diagram

74HC161

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© Nexperia B.V. 2021. All rights reserved

Product data sheet

Rev. 5 — 16 March 2021

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