Is there a pin-compatible replacement for SN75451BDR?

No pin-compatible replacement has been identified. While some dual drivers exist in the same SOIC-8 package, they lack the specific AND gate input structure of the SN75451BDR, making them not pin-for-pin compatible.

What risks should I check before replacing SN75451BDR?

The main risk is the logic function mismatch; the SN75451BDR has internal AND gates. Also check supply voltage compatibility, output ratings, and pinout differences, as most alternatives require circuit modification.

SN75451BDR Alternatives, Datasheet & Cross Reference | Texas Instruments

The SN75451BDR is a dual peripheral AND driver from Texas Instruments in a SOIC-8 package, used for driving loads from TTL logic. Finding a direct replacement requires matching the dual-channel configuration, output ratings, and integrated AND logic function.

AI replacement insight

Electrical riskhigh

The integrated AND logic function is missing in all viable candidates, requiring circuit redesign.

Package risklow

The SOIC-8 package is common, but pinout will not match due to functional differences.

Can it be replaced directly?

No, there is no direct, drop-in replacement for the SN75451BDR among the candidates reviewed.

Best replacement path

No direct replacement found. The best path is to use a standard dual low-side driver and implement the AND logic externally if required.

Main risk

The primary risk is the functional mismatch, as modern drivers do not integrate the specific AND logic of the SN75451BDR.

Recommended alternatives

A potential functional alternative in a SOIC-8 package with higher current, but requires review due to different input logic.

View details

Alternative comparison matrix

Feature / factor	SN75451BDR	HX27323-S	Compatibility / risk
Function	Dual AND Peripheral Driver	Dual Low-Side Driver	Dual Low-Side Driver — Target is a dual peripheral driver with AND logic.
Voltage	5V	4.5V to 25V	4.5V to 25V — Candidate has a wider compatible supply range.
Current	300mA	2A	2A — Candidate offers significantly higher output current.
Package	SOIC-8	SOIC-8	SOIC-8 — matched
Temperature	0°C to 70°C	-40°C to 125°C	-40°C to 125°C — Wider operating range.

Application & sourcing insights

Questions & answers

There are no direct drop-in replacements for the SN75451BDR. Alternatives like the HX27323-S exist as dual drivers but lack the integrated AND logic, requiring circuit redesign. Always verify pinout and logic functionality.