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Non Volatile RAM (F-RAM & NVSRAM)

PaFi_3886401
New Contributor

Hello friends,

Can anyone help pls. What are the additional symbols above and below?

DSCN4286.jpg

Best regards and thank U

Paolo

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1 Solution
AlbertB_56
Employee

Hello Paolo,

Thank you for contacting Cypress Semiconductor.

It appears you may have purchased the AM29LV640DU-90RWHI from an unauthorized distributor,

third party vendor or reseller, as these additional markings are not recognized as valid standard

markings from the factory.  These AM29LV640DU FLASH devices may have been refurbished or

possibly customer returns or RMA.  There appears to be a checksum that is marked on the device.

The checksum "CS = BCD4h"  indicates that this device has already been programmed by the

previous user/owner of this device.

The additional markings are not recognized as a valid standard markings from the factory.

Best regards,

Albert

Cypress Semiconductor Corp.

An Infineon Technologies Company

View solution in original post

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4 Replies
AlbertB_56
Employee

Hello Paolo,

Thank you for contacting Cypress Semiconductor.

It appears you may have purchased the AM29LV640DU-90RWHI from an unauthorized distributor,

third party vendor or reseller, as these additional markings are not recognized as valid standard

markings from the factory.  These AM29LV640DU FLASH devices may have been refurbished or

possibly customer returns or RMA.  There appears to be a checksum that is marked on the device.

The checksum "CS = BCD4h"  indicates that this device has already been programmed by the

previous user/owner of this device.

The additional markings are not recognized as a valid standard markings from the factory. 

Best regards,

Albert

Cypress Semiconductor Corp.

An Infineon Technologies Company

0 Likes
Reply
AlbertB_56
Employee

Hello Paolo,

Thank you for contacting Cypress Semiconductor.

It appears you may have purchased the AM29LV640DU-90RWHI from an unauthorized distributor,

third party vendor or reseller, as these additional markings are not recognized as valid standard

markings from the factory.  These AM29LV640DU FLASH devices may have been refurbished or

possibly customer returns or RMA.  There appears to be a checksum that is marked on the device.

The checksum "CS = BCD4h"  indicates that this device has already been programmed by the

previous user/owner of this device.

The additional markings are not recognized as a valid standard markings from the factory.

Best regards,

Albert

Cypress Semiconductor Corp.

An Infineon Technologies Company

0 Likes
Reply
AlbertB_56
Employee

Hello Paolo,

Thank you for contacting Cypress Semiconductor.

It appears you may have purchased the AM29LV640DU-90RWHI from an unauthorized distributor,

third party vendor or reseller, as these additional markings are not recognized as valid standard

markings from the factory.  These AM29LV640DU FLASH devices may have been refurbished or

possibly customer returns or RMA.  There appears to be a checksum that is marked on the device.

The checksum "CS = BCD4h"  indicates that this device has already been programmed by the

previous user/owner of this device.

The additional markings are not recognized as a valid standard markings from the factory.

Best regards,

Albert

Cypress Semiconductor Corp.

An Infineon Technologies Company

0 Likes
Reply
AlbertB_56
Employee

Hello Paolo,

Thank you for contacting Cypress Semiconductor.

It appears you may have purchased the AM29LV640DU-90RWHI from an unauthorized distributor,

third party vendor or reseller, as these additional markings are not recognized as valid standard

markings from the factory.  These AM29LV640DU FLASH devices may have been refurbished or

possibly customer returns or RMA.  There appears to be a checksum that is marked on the device.

The checksum "CS = BCD4h"  indicates that this device has already been programmed by the

previous user/owner of this device.

The additional markings are not recognized as a valid standard markings from the factory.

Best regards,

Albert

Cypress Semiconductor Corp.

An Infineon Technologies Company

View solution in original post

0 Likes
Reply