Microchip Technology HCS410T/SN

The HCS410 supports remote keyless-entry encoding and batteryless LF transponder operation. In encoder mode it sends a 69-bit word containing a 32-bit encrypted hopping field and a 37-bit fixed field. Transponder mode supports bidirectional challenge-response. The T designation concerns tape-and-reel presentation, while the absence of an I temperature suffix identifies the standard 0 to +70 °C ordering grade.

SN identifies an 8-lead plastic SOIC with a nominal 150 mil body. The catalog package is 8-SOIC, 0.154-inch width; this matches the existing normalized package registration. HCS410T denotes tape and reel. Verify the manufacturer's land pattern and pin-1 orientation before board layout.

Layout checks

• Confirm SOIC top-view pin numbering and footprint.
• Design the LF network for the selected transponder mode.
• Decouple VDD and check external data connections.

The registered package and local JPG were checked. This illustration is not a dimensional drawing.

Microchip DS40158F 8-lead SOIC top-view assignment:

Check multiplexed functions and the configured mode before schematic release.

Validate mode-dependent limits and the external circuit against DS40158F.

HCS410T-I/SN is an industrial-grade order code and should not be treated as the same temperature designation as HCS410T/SN. Verify exact electrical conditions, package, reel requirements, programming, and receiver compatibility before substitution. Other HCS devices may differ in pinout and transponder protocol. No unverified alternative is linked.

Microchip Technology's HCS410 datasheet DS40158F specifies encoder and transponder operation, 8-lead SOIC pinout, electrical limits, and the ordering system. The identification table defines blank temperature suffix as 0 to +70 °C, SN as plastic SOIC, and HCS410T as tape-and-reel.

Verify the full HCS410T/SN ordering code, package marking, reel labeling, and lot traceability. Confirm that keys, serial identity, seed, and configuration are programmed through an authorized process and validated with the target reader and receiver.

Protect manufacturing keys and validate receiver synchronization, LF coil tuning, challenge-response mode, switch inputs, output timing, and supply limits against DS40158F. Verify system operation across the specified 0 to +70 °C grade before release.