3 Pin Configuration and Functions

1

2

3

7

4

5

6

14

13

12

8

11

10

9

GND

4A

4Y

3A

V

CC

15

16

A/B

1A

1B

1Y

2A

2B

G

3Y

4B

3B

2Y

Figure 3-1. N, D, or PW Package; 16-Pin PDIP, SOIC, or TSSOP (Top View)

Table 3-1. Pin Functions

PIN

TYPE(1)

DESCRIPTION

NAME

NO.

A/B

1

I

Address select

1A

2

I

Channel 1, data input A

1B

3

I

Channel 1, data input B

1Y

4

O

Channel 1, data output

2A

5

I

Channel 2, data input A

2B

6

I

Channel 2, data input B

2Y

7

O

Channel 2, data output

GND

8

G

Ground

3Y

9

O

Channel 3, data output

3B

10

I

Channel 3, data input B

3A

11

I

Channel 3, data input A

4Y

12

O

Channel 4, data output

4B

13

I

Channel 4, data input B

4A

14

I

Channel 4, data input A

G

15

I

Output strobe, active low

VCC

16

P

Positive supply

Thermal pad(2)

—

The thermal pad can be connected to GND or left floating. Do not connect to any other

signal or supply.

(1)

Signal Types: I = Input, O = Output, I/O = Input or Output, P = Power, G = Ground.

(2)

WBQB package only.

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CD74ACT157

SCHS340C – MARCH 2003 – REVISED AUGUST 2024

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