Microchip Technology ATECC108-MAHCZ-T

ATECC108-MAHCZ-T combines hardware-based elliptic-curve authentication with EEPROM for keys, certificates, and configuration data. A host can request cryptographic operations without exposing stored private keys on the interface. The exact MAHCZ ordering option uses the single-wire interface; the MAHDA order code is the I2C variant.

The manufacturer identifies ATECC108-MAHCZ-T as an 8-pad thermally enhanced UDFN, package code 8MA2, with a nominal 2.0 × 3.0 × 0.6 mm body. The existing LCDChip catalog names its package 8-UFDFN Exposed Pad; verify pad and exposed-pad geometry against the manufacturer drawing before PCB release.

Layout checks

• Use the 8MA2 package drawing for pad dimensions and pin-one orientation.
• Check the exposed thermal-pad footprint and assembly recommendations.
• Confirm the single-wire host timing, connection, and supply decoupling.

The registered package JPG is pending on the production site; the reference image may not display until it is supplied.

The manufacturer's bottom-view 8-pad UDFN figure identifies VCC, GND, SDA, SCL, and NC pads. The exact MAHCZ-T ordering row specifies single-wire communication, so do not design this variant as an I2C bus device.

Confirm pad numbering, bottom-view orientation, and the single-wire electrical connection before layout.

Operating specifications are distinct from absolute-maximum stress ratings. Use the manufacturer's controlled documentation for final electrical and mechanical limits.

Microchip's ATECC108A summary describes ATECC108A as compatible with ATECC108 when properly configured. Evaluate the exact ATECC108A-MAHCZ-T ordering option if a follow-on device is needed, but do not assume that personalization data, command behavior, or lock configuration transfers unchanged. Check the package drawing, single-wire behavior, operating limits, provisioning procedure, and product lifecycle before substitution.

The ATECC108-MAHDA-T option uses I2C, so it is not an interface-equivalent substitute for this MAHCZ single-wire variant. No LCDChip internal replacement link is asserted here without an exact API match.

ATECC108 was documented under Atmel's CryptoAuthentication family and is listed under Microchip Technology. The manufacturer summary marks the original ATECC108 not recommended for new designs and identifies ATECC108A as its replacement family. Check current product documentation and procurement status for a new design.

Confirm the full order code, package marking, handling condition, and traceability information for received material. Cryptographic authenticity depends on correctly provisioned keys and host-side verification; the presence of the IC alone does not establish authenticity for a completed product.

Use the manufacturer datasheet and package drawing to verify electrical limits, pin orientation, security configuration, and assembly before production. The package illustration referenced above is awaiting upload to the production site.