HCS361_11 datasheet(1/42 Pages) MICROCHIP

Part #	HCS361

Description	KEELOQ짰 Code Hopping Encoder incorporates high security,

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Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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DS40146F-page 1

FEATURES

Security

• Programmable 28/32-bit serial number

• Programmable 64-bit encryption key

• Each transmission is unique

• 67-bit transmission code length

• 32-bit hopping code

• 35-bit fixed code (28/32-bit serial number,

4/0-bit function code, 1-bit status, 2-bit CRC)

• Encryption keys are read protected

Operating

• 2.0-6.6V operation

• Four button inputs

- 15 functions available

• Selectable baud rate

• Automatic code word completion

• Battery low signal transmitted to receiver

• Nonvolatile synchronization data

• PWM and VPWM modulation

Other

• 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

• Minimum component count

Enhanced Features Over HCS300

• 48-bit seed vs. 32-bit seed

• 2-bit CRC for error detection

• 28/32-bit serial number select

• Two seed transmission methods

• PWM and VPWM modulation

• Wake-up signal in VPWM mode

• IR Modulation mode

Typical Applications

The HCS361 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

DESCRIPTION

The HCS361 is a code hopping encoder designed for

secure Remote Keyless Entry (RKE) systems. The

HCS361 utilizes the KEELOQ® code hopping technol-

ogy, which incorporates high security, a small package

outline and low cost, to make this device a perfect

solution for unidirectional remote keyless entry sys-

tems and access control systems.

PACKAGE TYPES

HCS361 BLOCK DIAGRAM

DESCRIPTION

The HCS361 combines a 32-bit hopping code

generated by a nonlinear encryption algorithm, with a

28/32-bit serial number and 7/3 status bits to create a

67-bit transmission stream.

1

2

3

4

8

7

6

5

S0

S1

S2

S3

VDD

LED

DATA

VSS

PDIP, SOIC

VSS

VDD

Oscillator

RESET circuit

LED driver

Controller

Power

latching

and

switching

Button input port

32-bit shift register

Encoder

EEPROM

DATA

LED

S3 S2 S1 S0

HCS361

KEELOQ® Code Hopping Encoder

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	HCS361-SN	343Kb / 24P	KEELOQ CODE HOPPING ENCODER 1996 - 1997

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HCS361 Datasheet(PDF) 1 Page - Microchip Technology

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