Microchip Technology HCS365/P

The HCS365 generates changing KEELOQ code words for remote-control transmitters. Two programmable serial numbers, crypt keys, and seed values support its dual-encoder capability. Four button inputs allow up to 15 encoded functions, while configurable modulation and timing choices support different transmitter designs. The /P suffix identifies the eight-lead 300 mil plastic DIP.

• Two programmable 64-bit crypt keys and two 60-bit seed values.
• 32-bit hopping-code field and 67- or 69-bit transmission format depending on configuration.
• PWM, VPWM, PPM, or Manchester output modulation.
• Four selectable baud rates, button-queue information, and low-battery indication.
• On-chip EEPROM, tuned oscillator, LED output, and ASK/FSK PLL control.

Microchip's P suffix specifies an eight-lead plastic DIP with a 300 mil body. The catalog's normalized package is 8-DIP. Use the manufacturer PDIP mechanical drawing for hole spacing, orientation, and pin-1 marking; the SM surface-mount version requires a different footprint.

Layout checks

• Verify the 300 mil body and 2.54 mm pin pitch.
• Follow the PDIP top-view pin numbering.
• Keep supply decoupling close to VDD and VSS.

The package image is pending; use the datasheet drawing for exact dimensions.

Microchip DS41109D PDIP top-view assignment:

Multiplexed behavior depends on configuration; check the datasheet before wiring.

The 67/69-bit choice depends on programmed options; do not assume a fixed format.

HCS365-I/SM is an industrial-grade surface-mount variant, not a footprint-equivalent replacement for the P DIP. Compare package, temperature grade, modulation, timing, serial and key provisioning, seed behavior, and receiver synchronization before selecting an alternative. No unverified internal product link is provided.

Microchip DS41109D documents the HCS365 encoder architecture, pin diagram, operating conditions, 300 mil PDIP outline, and product identification system. Its unsuffixed temperature option is 0 to +70 °C; I identifies the industrial grade.

Verify the exact HCS365/P order code, PDIP marking, and lot traceability. Protect keys and seed values during programming and test the provisioned transmitter against the intended receiver.

Verify the exact PDIP pinout, operating grade, receiver compatibility, modulation, low-battery threshold, timing, and cryptographic provisioning against DS41109D and applicable Microchip errata before design release.