Microchip Technology HCS320T/SN

The HCS320 combines a 32-bit hopping code with fixed identification and status fields to create a 66-bit transmission stream. Its button inputs and PWM output support compact battery-powered transmitters. Each activation changes the hopping portion; receiver synchronization and secret management are essential system functions.

Microchip identifies SN as an 8-lead plastic SOIC with a 150-mil body; HCS320T specifies tape-and-reel delivery. LCDChip registers this device as 8-SOIC (0.154", 3.90 mm width). Verify the controlled SOIC drawing and pin-one mark for production layout.

Layout checks

• Check SOIC land pattern and orientation.
• Route PWM to the transmitter modulation circuit.
• Provide the required supply bypassing and LED drive path.

This generic JPG does not show device pin assignments.

For the SOIC package, the manufacturer lists S0, S1, S2 and SHIFT button inputs; PWM serial-code output; LED indicator output; VDD supply; and VSS ground. Use the Microchip package diagram to confirm exact pin numbers and output polarity before routing.

Refer to the manufacturer data sheet for limits, timing, programming and transmitter waveforms.

A matching 8-SOIC outline alone does not establish interchangeability. Verify KEELOQ algorithm and decoder compatibility, secret-key derivation, serial-number mapping, button-function encoding, timing, voltage range, temperature grade and programming method. The -I industrial grade is a different order code. No unverified internal alternative link is asserted.

Microchip Technology's HCS320 KEELOQ Code Hopping Encoder data sheet, DS41097D, provides the features, pin assignments, electrical limits and product identification system. Its ordering table explicitly identifies HCS320T as tape and reel and SN as 8-lead 150-mil SOIC.

Verify the full HCS320T/SN order code, reel and lot labeling, device markings and traceability records. Production acceptance should confirm programming and a successful synchronized transmission with the intended decoder; external markings cannot prove the programmed key.

Use the current Microchip HCS320 data sheet, package drawing and applicable notices for final circuit, programming and receiver approval. Effective replay protection depends on proper key secrecy, receiver synchronization and end-to-end system design; this summary is not a security certification.