Microchip Technology ATA663254-GAQW-VAO

The ATA663254 is a LIN system basis chip (SBC) intended for compact automotive slave nodes. It integrates the LIN bus transceiver with a 5.0 V regulator rated for 85 mA output and provides an NRES undervoltage-reset signal. EN and TXD select operating modes, while RXD reports bus activity to the controller. The -GAQW-VAO variant is the 8-SOIC, tape-and-reel, RoHS-compliant automotive ordering option; it is distinct from the -GBQW-VAO VDFN package.

The registered package is 8-SOIC (0.154", 3.90mm Width), corresponding to Microchip's 8-lead SOIC/SO8 drawing. The local JPG is a generic package illustration, not a device-marking or thermal drawing. Microchip specifically requires SOIC pin 5 to connect to a wide ground plate for heat sinking; use the manufacturer's recommended land pattern and thermal safe-operating-area curves.

Layout checks

• Connect pin 5 to a broad GND copper area as required for SOIC heat dissipation.
• Check regulator load and VS voltage against the SOIC safe operating area.
• Validate pin-1 orientation and the Microchip SO8 footprint before fabrication.

The generic JPG does not replace the controlled mechanical and thermal drawings.

The ATA663254 8-SOIC pin table assigns these functions:

Pin numbering is top view; follow the manufacturer's application circuit for external capacitors and bus connections.

Typical values are not guaranteed maximums. Consult the complete data-sheet conditions, thermal curves and application circuit.

ATA663254-GBQW-VAO is a related 5 V LIN SBC but uses an 8-VDFN footprint rather than SOIC. ATA663231 variants use a 3.3 V regulator, so they are not direct output-voltage substitutes. Confirm package, pinout, regulator voltage/current, LIN behavior, automotive ordering and thermal design before any substitution. No unverified internal alternative link is provided.

Microchip's ATA663201/03/31/54 data sheet DS20006075C explicitly lists ATA663254-GAQW-VAO as an 8-lead SOIC, tape-and-reel, RoHS-compliant, automotive-qualified ATA663254 device. The document supplies the 5 V LIN SBC functional description, pin table, operating modes, electrical characteristics, package drawings and SOIC thermal guidance.

Verify the full -GAQW-VAO ordering code, reel and lot traceability, SOIC package marking, automotive qualification records and handling condition. A generic SOIC image does not establish device identity. Review current Microchip change notices and qualification documentation for the intended vehicle program.

Before schematic or PCB release, verify the latest Microchip data sheet, LIN physical-layer timing, VS transients, reset and wake-up behavior, external capacitors, regulator loading and the SOIC safe operating area. The 85 mA regulator rating is not an unconditional available load at every VS and ambient temperature.