Nexperia

74HC191

Presettable synchronous 4-bit binary up/down counter

• Complies with JEDEC standards:

• JESD8C (2.7 V to 3.6 V)

• JESD7A (2.0 V to 6.0 V)

• ESD protection:

• HBM JESD22-A114F exceeds 2000 V

• MM JESD22-A115-A exceeds 200 V

• Specified from -40 °C to +85 °C and -40 °C to +125 °C

3. Ordering information

Table 1. Ordering information

Package

Type number

Temperature range Name

Description

Version

74HC191D

-40 °C to +125 °C

SO16

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

74HC191PW

-40 °C to +125 °C

TSSOP16 plastic thin shrink small outline package; 16 leads;

body width 4.4 mm

SOT403-1

4. Functional diagram

aaa-024376

TC

4

14

5

12

RC

3

D3

D2

D1

D0

Q3

Q2

Q1

Q0

15

13

2

6

7

1

10

9

11

CE

U/D

CP

PL

Fig. 1. Logic symbol

aaa-024375

PARALLEL LOAD

CIRCUIT

D0 D1 D2 D3

Q0

3

2

6

7

15

1

10

9

Q1 Q2 Q3

TC

RC

12

13

CE

CP

PL

U/D

4

14

11

5

BINARY

COUNTER

Fig. 2. Functional diagram

74HC191

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© Nexperia B.V. 2021. All rights reserved

Product data sheet

Rev. 6 — 8 September 2021

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