Identification confirmation for SMD marking "95 AVF" (SOIC-8 package)

[rowertW]

Hello ST Community, I am repairing an electronic board (HVAC controller) and trying to confirm the exact part number for an IC in a SOIC-8 package. The top marking on the chip reads: Line 1: 95 Line 2: AVF. Based on ST marking conventions for small footprint ICs, my understanding is that "95" represents the TS952 series (dual rail-to-rail operational amplifier), and "AVF" is the internal trace/lot code. Could someone from the ST team or community please confirm: 1. Is "95" indeed the official package marking code for the TS952IDT (SOIC-8)? 2. Is TS952IDT the direct replacement/equivalent for this component? Thank you in advance for your support!

Confirmation of SMD marking "95 AVF" (SOIC-8) located near electrolytic capacitor
 

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[Peter BENSCH]

Welcome ​@rowertW, to the community!

What makes you assume the device is from STMicroelectronics?

It is not in an SO-8 package, nor does the marking font resemble those used by ST. Furthermore, the TS952IDT is marked 952I, which in no way matches the final digits 95, which one might just about make out.

Regards
/Peter

[rowertW]

Hi Peter,
Thank you for your reply. To clarify: the board is heavily coated with conformal varnish (used in HVAC controllers for environmental protection), which distorts the photo and obscures the package layout. Under the varnish, the chip is indeed an 8-pin SOIC. The logo on the left of the package is the standard ST stylized logo, which is why I assumed STMicroelectronics as the manufacturer. Since you mentioned TS952IDT is marked as "952I", could you point out what ST component in a SOIC-8 package uses the "95" marking code alongside a lot code like "AVF"? If this isn't TS952IDT, I would really appreciate any help identifying the correct ST part number based on this footprint and marking pattern.

Best regards!