&

5

3

2B

2A

1B

1A

2Y

1Y

7

6

2

1

2B

2A

1B

1A

4

5

3

GND

2Y

1Y

7

6

2

1

Copyright © 2016 Texas Instruments Incorporated

10

SN55451B, SN55452B, SN55453B, SN55454B

SN75451B, SN75452B, SN75453B, SN75454B

SLRS021C – DECEMBER 1967 – REVISED MAY 2016

www.ti.com

Product Folder Links: SN55451B SN55452B SN55453B SN55454B SN75451B SN75452B SN75453B SN75454B

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Copyright © 1967–2016, Texas Instruments Incorporated

Functional Block Diagrams (continued)

(1)

Positive logic: Y = AB or NOT(A + B)

Figure 9. SNx5454B Logic Diagram (Positive Logic)

9.3 Feature Description

The SNx5451B devices allow for high current driving up to 300 mA. This family of devices have AND, NAND,

OR, or NOR input logic gates to allow for a wide variety of applications. The SN7545xB devices are rated for a

commercial temperature range of 0°C to 70°C, and the SN5545xB devices are rated for a military temperature

range of –65°C to 125°C.

9.4 Device Functional Modes

Table 1, Table 2, Table 3, and Table 4 list the functional modes of the SNx545xB.

Figure 10. SNx5451B Logic Symbol

Table 1. SNx5451B Function Table

A

B

L

L

L (on state)

L

H

L (on state)

H

L

L (on state)

H

H

H (off state)