Microchip Technology HCS362-I/SN

The HCS362 encodes button actions into a 69-bit transmission stream with a 32-bit encrypted hopping portion and a 37-bit fixed portion. Four switch inputs allow up to 15 input functions. A receiver must implement matching key learning and synchronization to interpret transmissions. The exact I/SN order code specifies an industrial-temperature, 8-lead plastic SOIC device; the T-marked version is the separate tape-and-reel order code.

Microchip identifies SN as an 8-lead plastic SOIC with a nominal 150 mil body. The manufacturer package drawing identifies the narrow 3.90 mm body and 1.27 mm lead pitch. The site's existing normalized 8-SOIC entry matches its 0.154-inch-width package category.

Layout checks

• Confirm SOIC land pattern, lead pitch, and pin-1 orientation from DS40189E.
• Route DATA and RFEN to the chosen transmitter interface.
• Provide local supply decoupling and appropriate switch-input wiring.

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

Microchip DS40189E SOIC top-view pin configuration:

Check multiplexed functions and top-view orientation before finalizing the schematic.

The receiver and transmitter stage must use compatible coding, timing, keys, and learning procedures.

Other HCS encoders are not automatically interchangeable. Compare code-word format, button and RF-enable pin functions, package, timing options, EEPROM provisioning, and receiver synchronization. HCS362T-I/SN is the separate tape-and-reel order code; confirm ordering and assembly requirements before substitution. No internal alternative is linked without a verified exact product record.

Microchip Technology publishes HCS362 datasheet DS40189E with the encoder format, pinout, electrical conditions, package drawing, and product-identification table. That table defines I as −40 to +85 °C and SN as the 8-lead plastic SOIC.

Verify the full HCS362-I/SN code, package marking, and lot traceability. Confirm that keys, serial number, and configuration were programmed under an authorized process and that the intended receiver recognizes the resulting code format.

Code hopping depends on secure key provisioning and correct receiver synchronization. Verify button combinations, RFEN multiplexing, modulation, oscillator calibration, timing, battery-low behavior, and supply limits against DS40189E. Protect manufacturing keys and validate the complete RF link before release.