HCS301-/P MICROCHIP [Microchip Technology], HCS301-/P Datasheet

HCS301-/P

Manufacturer Part Number

HCS301-/P

Description

KEELOQ CODE HOPPING ENCODER

Manufacturer

MICROCHIP [Microchip Technology]

Datasheet

1.HCS301-P.pdf (30 pages)

Current page: 1 of 30
Download datasheet (424Kb)

FEATURES

Security

• Programmable 28-bit serial number

• Programmable 64-bit encryption key

• Each transmission is unique

• 66-bit transmission code length

• 32-bit hopping code

• 34-bit fixed code (28-bit serial number,

• Encryption keys are read protected

Operating

• 3.5V - 13.0V operation

• Four button inputs

• No additional circuitry required

• 15 functions available

• Selectable baud rate

• Automatic code word completion

• Battery low signal transmitted to receiver

• Battery low indication on LED

• Non-volatile synchronization data

Other

• Functionally identical to HCS300

• 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

Typical Applications

The HCS301 is ideal for Remote Keyless Entry (RKE)

applications. These applications include:

• Automotive RKE systems

• Automotive alarm systems

• Automotive immobilizers

• Gate and garage door openers

• Identity tokens

• Burglar alarm systems

2001 Microchip Technology Inc.

4-bit button code, 2-bit status)

Code Hopping Encoder

DESCRIPTION

The HCS301 from Microchip Technology Inc. is a code

hopping encoder designed for secure Remote Keyless

Entry (RKE) systems. The HCS301 utilizes the K

security, a small package outline and low cost, to make

this device a perfect solution for unidirectional remote

keyless entry systems and access control systems.

PACKAGE TYPES

HCS301 BLOCK DIAGRAM

The HCS301 combines a 32-bit hopping code,

generated by a nonlinear encryption algorithm, with a

28-bit serial number and 6 information bits to create a

66-bit code word. The code word length eliminates the

threat of code scanning and the code hopping mecha-

nism makes each transmission unique, thus rendering

code capture and resend schemes useless.

code hopping technology, which incorporates high

PWM

PDIP, SOIC

LED

RESET circuit

LED driver

Oscillator

EEPROM

HCS301

32-bit shift register

Button input port

S3 S2

Controller

S1 S0

Encoder

DS21143B-page 1

switching

Power

latching

and

LED

PWM

Related parts for HCS301-/P

Related keywords

HCS301-/P datasheet
HCS301-/P data sheet
HCS301-/P pdf datasheet
HCS301-/P component
HCS301-/P part
HCS301-/P distributor
HCS301-/P RoHS
HCS301-/P datasheet download