ATA5785-GHQW

ATA5785-GHQW is an automotive-grade security IC used mainly in immobilizers and secure-key applications. It combines secure non-volatile memory, a microcontroller, and a hardware cryptographic engine to enable mutual authentication with the vehicle’s system and to protect keys and data from cloning or tampering. The device typically offers secure key storage, tamper protection, and robust cryptographic capabilities suitable for harsh automotive environments (temperature, EMI, etc.). The “GHQW” suffix denotes a specific package/variant; exact pinout, operating voltage, and package dimensions are defined in the datasheet. Common use cases include immobilizers, smart keys, and other security-critical automotive subsystems requiring hardware-backed cryptography and secure key management.

8 pins. Function: An 8‑pin automotive security/immobilizer transponder IC (cryptographic authentication device in the ATA578x family).

Manufacturer: Atmel Corporation (now part of Microchip Technology).
What kind of company: A semiconductor company that designs and manufactures microcontrollers, memory (EEPROM/Flash), and other ICs for embedded and automotive applications.

ATA5785-GHQW is used for automotive security transponders. Key applications include:
- Passive keyless entry (PKE) and smart/key fob systems
- Immobilizer/transponder for engine-start authorization
- Vehicle access control and anti-theft systems (secure key handling)
- Inductive energy-harvesting transponder in automotive keys and related access devices
In short: automotive immobilizers, RKE/SMART keys, and related secure access applications.

ATA5785-GHQW comes in an 8-pin SOIC (SOP-8) package.