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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,

4-bit button code, 2-bit status)

鈥?Encryption keys are read protected

DESCRIPTION

The HCS201 from Microchip Technology Inc. is a code

hopping encoder designed for secure Remote Keyless

Entry (RKE) systems. The HCS201 utilizes the K

EE

L

OQ

code hopping technology, incorporating high security, a

small package outline and low cost. The HCS201 is a

perfect solution for unidirectional remote keyless entry

systems and access control systems.

PACKAGE TYPES

PDIP, SOIC

S0

S1

S2

V

DDB

1

8

V

DD

STEP

DATA

V

SS

Operating

鈥?3.5V-13V operation

(2.0V min. using the Step up feature)

鈥?Three button inputs

鈥?7 functions available

鈥?Selectable baud rate

鈥?Automatic code word completion

鈥?Battery low signal transmitted to receiver

鈥?Non-volatile synchronization data

HCS201

2

3

4

7

6

5

HCS201 BLOCK DIAGRAM

V

DDB

V

DD

Other

鈥?/div>

Simple programming interface

On-chip EEPROM

On-chip oscillator and timing components

Button inputs have internal pull-down resistors

Minimum component count

Synchronous Transmission mode

Built-in step up regulator

DATA

V

SS

V

DD

Oscillator

RESET circuit

Step Up

Controller

Power

latching

and

switching

STEP

Controller

EEPROM

Encoder

32-bit shift register

Typical Applications

鈥?The HCS201 is ideal for Remote Keyless Entry

(RKE) applications. These applications include:

鈥?Automotive RKE systems

鈥?Automotive alarm systems

鈥?Automotive immobilizers

鈥?Gate and garage door openers

鈥?Identity tokens

鈥?Burglar alarm systems

Button input port

S

2

S

1

S

0

The HCS201 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.

漏

2001 Microchip Technology Inc.

DS41098C-page 1

型號

版本

描述

廠商

下載
HCS200

英文版

KEELOQ® Code Hopping Encoder

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KEELOQ CODE HOPPING ENCODER

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KEELOQ Code Hopping Encoder

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HCS201
HCS20D

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Radiation Hardened Dual 4-Input NAND Gate

HCS20D
HCS20D

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Radiation Hardened Dual 4-Input NAND Gate

INTERSIL [...

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HCS20K

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Radiation Hardened Dual 4-Input NAND Gate

HCS20K
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Radiation Hardened Dual 4-Input NAND Gate

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HCS21D

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Radiation Hardened Dual 4-Input AND Gate

HCS21D
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Radiation Hardened Dual 4-Input AND Gate

INTERSIL [...

HCS21D
HCS21K

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Radiation Hardened Dual 4-Input AND Gate

HCS21K
HCS21K

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Radiation Hardened Dual 4-Input AND Gate

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HCS21K
HCS27D

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Radiation Hardened Triple 3-Input NOR Gate

HCS27D
HCS27D

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Radiation Hardened Triple 3-Input NOR Gate

INTERSIL [...

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HCS27K

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Radiation Hardened Triple 3-Input NOR Gate

HCS27K
HCS27K

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Radiation Hardened Triple 3-Input NOR Gate

INTERSIL [...

HCS27K
HCS20MS

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Radiation Hardened Dual 4-Input NAND Gate

HCS20MS
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Radiation Hardened Dual 4-Input NAND Gate

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HCS20MS
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Radiation Hardened Dual 4-Input AND Gate

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英文版

Radiation Hardened Dual 4-Input AND Gate

INTERSIL [...

HCS21MS

HCS201 Datasheet

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