Microchip Technology HCS362-I/P

When a button is pressed, the HCS362 combines a 32-bit encrypted hopping portion with 37 fixed and status bits in a 69-bit transmitted word. An EEPROM stores two cryptographic keys, serial number, synchronization data, 60-bit seed, and configuration. The DATA output interfaces to external transmission circuitry; an RF transmitter and receiver are not integrated.

LCDChip registers 8-DIP (0.300", 7.62mm). Microchip's product-identification table maps /P to an eight-lead, 300-mil plastic DIP and the -I suffix to -40°C through +85°C. Do not substitute the surface-mount /SN footprint without a board redesign.

Layout checks

• Verify row spacing and drill dimensions from the controlled drawing.
• Use the top-view pin-one mark when orienting the package.
• Keep button, DATA, and LED traces consistent with the reference circuit.

The expected local JPG is absent and its production URL currently returns HTTP 404. This draft must remain unpublished until the asset is restored and checked.

Microchip's eight-pin top view assigns S0 to pin 1, S1 to pin 2, S2/programming clock to pin 3, S3/RFEN switch input or RF-enable output to pin 4, VSS to pin 5, DATA/programming I/O to pin 6, LED/SHIFT indicator cathode or dual-mode SHIFT input to pin 7, and VDD to pin 8. Confirm programming and transmitter circuitry against the manufacturer's diagrams.

Apply the detailed manufacturer DC and timing limits at the actual supply, output load, and temperature.

Other code-hopping encoders can differ in word format, modulation, provisioning, receiver learning, package, and grade. HCS362 is not a drop-in replacement solely because its eight-pin outline resembles another HCS device. No unverified internal alternative link is provided.

Microchip Technology's HCS362 KEELOQ Code Hopping Encoder data sheet, DS40189D, is the technical basis for this description, including the feature list, pin table, transmission format, electrical characteristics, and product-identification system. Check current manufacturer documentation and lifecycle notices during design review.

Confirm marking, lot traceability, DIP dimensions, supply behavior, button inputs, DATA waveform, and LED behavior. Protect provisioning keys and verify receiver enrollment and synchronization on the actual hardware. Assess legacy cipher suitability for the current threat model.

Use the current Microchip data sheet for final electrical limits, programming sequences, RF timing, footprint drawing, and key management. Restore and inspect the production package image before formal publication.