Is there a pin-compatible replacement for L78L05ACD13TR?

Yes, L78L05ABD13TR is a pin-compatible replacement. Alternatives from other vendors like Texas Instruments (UA78L05ACDR) or onsemi (MC78L05ACDR2G) are also likely pin-compatible, but you must verify the package dimensions and pinout using the datasheet before assembly.

What risks should I check before replacing L78L05ACD13TR?

Before replacing, you should primarily check for package compatibility, as SO-8 and SOIC-8 packages can have minor dimensional differences. Also, verify the pinout is identical, although it is standardized for 78L05 devices. Finally, ensure the temperature range and input voltage of the replacement meet or exceed your design's requirements.

L78L05ACD13TR Alternatives, Datasheet & Cross Reference | STMicroelectronics

The L78L05ACD13TR is a standard 5V, 100mA positive linear voltage regulator in an SO-8 package. Several direct and functional alternatives are available, with the L78L05ABD13TR offering a simple, pin-compatible upgrade.

AI replacement insight

Electrical risklow

Key electricals (5V, 100mA) are a common standard.

Package riskmedium

Slight variations in SOIC-8/SO-8 packages across vendors require PCB layout verification.

Firmware risklow

No firmware interaction for this simple linear regulator.

Can it be replaced directly?

Yes, the L78L05ABD13TR from STMicroelectronics is a direct, pin-compatible upgrade for the L78L05ACD13TR.

Best replacement path

The L78L05ABD13TR is the best replacement, offering a wider temperature range from the same manufacturer in an identical package.

Main risk

The primary risk when considering alternatives from other manufacturers is ensuring the package footprint (SOIC-8 vs. SO-8) and pinout are identical to the original part.

Recommended alternatives

An upgraded alternative from the same manufacturer with a wider operating temperature range.

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Alternative comparison matrix

Feature / factor	L78L05ACD13TR	L78L05ABD13TR	MC78L05ACDR2G	UA78L05ACDR	Compatibility / risk
Package	SO-8	SO-8	8-SOIC	SOIC-8	SO-8 / 8-SOIC / SOIC-8 — Package and pin count match.; MC78L05ACDR2G: 8-SOIC and SO-8 are similar but require footprint verification.; UA78L05ACDR: SOIC-8 and SO-8 are similar but require footprint verification.
Voltage	5.0V	5.0V	30V	5.0V	5.0V / 30V — Output voltage matches.; MC78L05ACDR2G: Higher maximum input voltage provides more design margin.; UA78L05ACDR: Output voltage matches.
Current	100mA	100mA	100mA	100mA	100mA — Output current matches.; MC78L05ACDR2G: Output current matches.; UA78L05ACDR: Output current matches.
Temperature	0°C to 125°C	-40°C to 125°C	0°C to 125°C	0°C to 125°C	-40°C to 125°C — Wider operating temperature range.; MC78L05ACDR2G: Operating temperature range matches.; UA78L05ACDR: Operating temperature range matches.

Application & sourcing insights

Questions & answers

The best alternative is L78L05ABD13TR. It is made by the same manufacturer (STMicroelectronics) and is a direct pin-compatible upgrade with a wider operating temperature range.