Is there a pin-compatible replacement for M95640-WMN6TP?

The M95256-WMN6TP is highly likely to be pin-compatible as it shares the same SO8 package, pin count, and product family. However, a full pinout comparison using the official datasheets is required to confirm it is a drop-in replacement.

What risks should I check before replacing M95640-WMN6TP?

Before replacing, verify firmware compatibility with the new memory size, as both top candidates have larger memory. For the M95512-WMN6TP, also confirm that its slower 10MHz clock speed (vs. the original's 20MHz) will not negatively impact your system's performance.

M95640-WMN6TP Alternatives, Datasheet & Cross Reference | STMicroelectronics

For the M95640-WMN6TP, a 64Kbit SPI EEPROM, several alternatives from STMicroelectronics exist. The best options are in the same M95xxx family, offering a similar form factor and electrical profile but with different memory capacities that require firmware verification.

AI replacement insight

Electrical risklow

Voltage and interface specs match on top candidates.

Package risklow

Candidates share the same SO8 package.

Firmware riskmedium

Changes in memory size require software/firmware validation.

Can it be replaced directly?

No direct, drop-in replacement is confirmed without datasheet review, but M95256-WMN6TP is a very strong candidate from the same product family.

Best replacement path

M95256-WMN6TP is the most promising alternative, offering more memory with otherwise identical key specifications. It requires a firmware check.

Main risk

The primary risk is firmware incompatibility, especially when changing memory size. A secondary risk is performance degradation if a slower-clocked part is used.

Recommended alternatives

A larger memory (256Kbit) alternative from the same family, matching package, voltage, and interface.

View details

Alternative comparison matrix

Feature / factor	M95640-WMN6TP	M95256-WMN6TP	M95512-WMN6TP	Compatibility / risk
Memory Size	64 Kbit	256 Kbit	512 Kbit	256 Kbit / 512 Kbit — Larger memory capacity.; M95512-WMN6TP: Significantly larger memory capacity.
Interface	SPI	SPI	SPI	SPI — matched; M95512-WMN6TP: matched
Package	SO8	SO8	SO8	SO8 — matched; M95512-WMN6TP: matched
Voltage	2.5V ~ 5.5V	2.5V ~ 5.5V	2.5V ~ 5.5V	2.5V ~ 5.5V — matched; M95512-WMN6TP: matched
Clock Frequency	20 MHz	20 MHz	10 MHz	20 MHz / 10 MHz — matched; M95512-WMN6TP: Slower clock may impact performance.

Application & sourcing insights

Questions & answers

The best alternative identified is the M95256-WMN6TP. It is from the same STMicroelectronics family and has identical key electrical specs and package, but with a larger memory capacity of 256Kbit versus 64Kbit. Firmware must be checked for compatibility.