Is there a pin-compatible replacement for MS8311?

Several op-amps like GS2261-TR use the same SOT23-5 package and a standard pinout, but are not guaranteed drop-in replacements. Electrical parameters like supply voltage must be verified to ensure compatibility.

What risks should I check before replacing MS8311?

Key risks include: 1) Supply Voltage: Ensure the replacement works with your rail (e.g., down to 2.7V). 2) Precision: Match the low offset voltage (Vos) and input bias current (Ib). 3) Bandwidth: A mismatch can affect signal integrity or cause instability.

MS8311 Alternatives, Datasheet & Cross Reference | Ningbo Songle Relay Co., Ltd.

MS8311 is a precision 10MHz rail-to-rail op-amp in a SOT23-5 package. When searching for a replacement, it's critical to match its low offset voltage, low input bias current, and 2.7V to 5.5V supply range.

AI replacement insight

Electrical riskhigh

Supply voltage and precision parameters are critical and hard to match simultaneously.

Package risklow

The SOT23-5 package is very common for single op-amps.

Firmware risklow

Not applicable for this type of analog component.

Can it be replaced directly?

There is no verified direct drop-in replacement for MS8311. GS2261-TR is a strong functional alternative but has a higher minimum supply voltage of 3.3V.

Best replacement path

Use GS2261-TR if your application's supply voltage is 3.3V or higher. If a lower supply is needed, no direct high-precision match was found, and a new part search is recommended.

Main risk

The primary risk is finding a part that matches both the precision characteristics and the wide supply voltage range (down to 2.7V) of the MS8311.

Recommended alternatives

Strong functional alternative with similar precision and bandwidth, but requires a minimum supply of 3.3V.

View details

Alternative comparison matrix

Feature / factor	MS8311	GS2261-TR	GS8051-TR	Compatibility / risk
Package	SOT23-5	SOT23-5	SOT23-5	SOT23-5 — Form factor matches.; GS8051-TR: Form factor matches.
Voltage	2.7V to 5.5V	3.3V to 36V	2.5V to 5.5V	3.3V to 36V / 2.5V to 5.5V — Candidate minimum supply voltage is higher.; GS8051-TR: Supply range is compatible.
Bandwidth	10 MHz	11 MHz	250 MHz	11 MHz / 250 MHz — Very close match, suitable for most applications.; GS8051-TR: Significantly higher bandwidth may cause instability.
Offset Voltage	65 µV	100 µV	-	100 µV — Comparable precision.
Input Bias Current	1 pA	-	1 pA	1 pA — Matches target's precision input.

Application & sourcing insights

Questions & answers

GS2261-TR is a strong functional alternative with similar precision and bandwidth, but it requires a minimum supply of 3.3V, which is higher than the MS8311's 2.7V. Verify your supply voltage before use.