HCS365 datasheet(1/40 Pages) MICROCHIP

Part #	HCS365

Description	KEELOQ짰 Code Hopping Encoder Crypt keys are read protected

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Manufacturer	MICROCHIP [Microchip Technology]

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DS41109E-page 1

KEELOQ® Code Hopping Encoder

FEATURES

Security

• Two programmable 32-bit serial numbers

• Two programmable 64-bit crypt keys

• Two programmable 60-bit seed values

• Each transmission is unique

• 67/69-bit transmission code length

• 32-bit hopping code

• Crypt keys are read protected

Operating

• 2.05-5.5V operation

• Four button inputs

• 15 functions available

• Four selectable baud rates

• Selectable minimum code word completion

• Battery low signal transmitted to receiver

• Nonvolatile synchronization data

• PWM, VPWM, PPM, and Manchester modulation

• Button queue information transmitted

• Dual Encoder functionality

Other

• On-chip EEPROM

• On-chip tuned oscillator (±10% over voltage and

temperature)

• Button inputs have internal pull-down resistors

•LED output

• PLL control for ASK and FSK

• Low external component count

Typical Applications

The HCS365 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

PACKAGE TYPES

HCS365 BLOCK DIAGRAM

GENERAL DESCRIPTION

The HCS365 is a code hopping encoder designed for

secure Remote Keyless Entry (RKE) and secure

remote control systems. The HCS365 utilizes the

KEELOQ® code hopping technology, which incorpo-

rates high security, a small package outline, and low

cost to make this device a perfect solution for unidirec-

tional authentication systems and access control sys-

tems.

The HCS365 combines a hopping code generated by a

nonlinear encryption algorithm, a serial number, and

status bits to create a secure transmission code. The

length of the transmission eliminates the threat of code

scanning and code grabbing access techniques.

1

2

3

4

8

7

6

5

S0

S1

S2

S3/SHIFT/

VDD

LED

DATA

Vss

PDIP, SOIC

RFEN

VSS

VDD

Oscillator

RESET circuit

LED driver

Controller

Power

latching

and

switching

Button input port

32-bit SHIFT register

Encoder

EEPROM

DATA

LED

S3/SHIFT S2 S

1

S

0

RFEN

HCS365

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Microchip Technology	HCS365	463Kb / 34P	KEELOQ Code Hopping Encoder 2002
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