HCS300-I/SN Datasheet PDF - Microchip

●The HCS300-I/SN is a Code Hopping Encoder designed for secure remote keyless entry (RKE) systems. The HCS300 utilizes patented KEELOQ® hopping technology incorporates high security to make this device a perfect solution for unidirectional remote keyless entry systems and access control systems. The HCS300 combines a 32-bit hopping code generated by a non-linear encryption algorithm with a 28-bit serial number and 6 status bits to create a 66-bit transmission stream. The length of the transmission eliminates the threat of code scanning and the code hopping mechanism makes each transmission unique, thus rendering code capture and re-send (code grabbing) schemes useless. The encryption key, serial number and configuration data are stored in EEPROM, which is not accessible via any external connection. This makes the HCS300 a very secure unit.

● Programmable 28-bit serial number

● Programmable 64-bit encryption key

● Each transmission is unique

● 66-bit transmission code length

● 32-bit hopping code

● 28-bit Serial number, 4-bit button code, 2-bit status

● Crypt keys are read protected

● Four button inputs

● No additional circuitry required

● 15 functions

● Selectable baud rate

● Automatic code word completion

● Low battery signal transmitted to receiver

● Non-volatile synchronization data

● Easy-to-use programming interface

● On-chip EEPROM

● On-chip oscillator and timing components

● Button inputs have internal pull-down resistors

● Current limiting on LED output

● Low external component cost

●ESD sensitive device, take proper precaution while handling the device.