Microchip Technology ATAES132A-MAHEQ-S

ATAES132A-MAHEQ-S is a secure serial EEPROM with authentication and confidential nonvolatile storage capabilities. Microchip's exact ordering table identifies MAH as the 8MA2 UDFN, EQ as SPI, and S as a small tape-and-reel option. Its 32 Kbit user memory is organized as 16 independently controlled 2 Kbit zones, allowing different access restrictions for data and keys.

The LCDChip catalog and package registry use 8-UFDFN Exposed Pad. Microchip's exact MAH ordering code specifies an eight-pad 2 × 3 × 0.6 mm thermally enhanced UDFN. Use the manufacturer-controlled 8MA2 outline and land pattern, and confirm pad orientation and exposed-paddle treatment for the board design.

Layout checks

• Verify pin-1 location against the UDFN top-view drawing.
• Route CS, SO, SI, SCK, VCC, and VSS for SPI operation.
• Confirm power bypassing and the manufacturer's current thermal-pad guidance.

The registered package JPG is absent locally and returns HTTP 404 on the production site. This draft must remain unpublished until the correct image is restored and visually verified.

Microchip's ATAES132A eight-pad UDFN top-view pinout assigns these SPI-mode functions:

Do not transfer the ER I2C pin behavior or standard EEPROM hold/write-protect assumptions to this SPI configuration without checking the manufacturer pin-list appendix.

Typical values are not guaranteed limits. Check the complete manufacturer tables for voltage, temperature, timing, and configured power state.

ATAES132A-MAHEQ-T uses the same MAH UDFN and EQ SPI interface but a different reel size. ATAES132A-MAHER variants use I2C instead of SPI and are not an automatic host-protocol substitute. Standard 32 Kbit SPI EEPROMs can differ in voltage range, page-write behavior, pin functions, security commands, and personalization; pin similarity alone does not establish drop-in equivalence. Verify the exact ordering code and zone/key configuration. No unverified internal product link is asserted.

Microchip Technology's ATAES132A 32K AES Serial EEPROM Complete Data Sheet, DS40002023A, explicitly identifies ATAES132A-MAHEQ-S as the UDFN SPI small-reel variant. Its pin configuration, electrical, memory, and security sections were used for this detail. Follow current controlled documentation and qualification notices.

Inspect the full MAHEQ-S ordering code, lot traceability, UDFN geometry, and intended personalization state. Confirm that configuration and key loading occurred through a trusted process and that host secrets remain protected. Catalog identification alone does not prove the authenticity of physical inventory.

Review the latest controlled data sheet for SPI timing, mode, power-state commands, 32-byte page boundaries, UDFN assembly, key provisioning, zone locking, and host-side authentication. Do not infer that an unpersonalized device provides an active security policy. Restore and visually verify the missing package image before publication.