TMS3637 datasheet(7/53 Pages) TI

7 / 53 page

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1 Introduction

The TMS3637 is a versatile 3-V to 6-V remote control transmitter/receiver in a small package that requires

no external dual-in-line package (DIP) switches on the system circuit board. The device can be easily set

for one of many transmit/receive configurations using configuration codes along with the desired security

code, both of which are user programmable. When used as a transmitter, the device encodes the stored

security code, transmits it to the remote receiver using any transmission media such as direct wiring,

infrared, or radio frequency. When configured as a receiver, the TMS3637 continuously monitors and

decodes the transmitted security code (at speeds that can exceed 90 kHz) and activates the output of the

device when a match with its internally stored code has been found. All programmed data is stored in

nonvolatile EEPROM memory. With more than four million codes alterable only with a programming station,

the TMS3637 is well suited for remote control system designs that require high security and accuracy.

Schematics of the programming station and other suggested circuits are included in this data manual.

In addition to the device configuration and security code capabilities, the TMS3637 includes several internal

features that normally require additional circuitry in a system design. These include an amplifier/comparator

for detection and shaping of input signals as low as several millivolts (typically used when an RF link is

employed) and an internal oscillator (used to clock the transmitted or received security code).

The TMS3637 is characterized for operation from – 25

°C to 85°C.

1.1

Features

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Data Encoder (Transmitter) or Data Decoder (Receiver) for Use in Remote Control Applications

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High Security

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4,194,304 Unique Codes Available

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Codes Stored in Nonvolatile Memory (EEPROM)

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Codes Alterable Only With a Programming Station That Ensures No Security Code

Duplications

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Versatile

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48 Possible Configurations as a Receiver

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18 Possible Configurations as a Transmitter

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Single, Multiple, or Continuous Cycling Transmission

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Easy Circuit Interface With Various Transmission Media

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Direct Wired

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Infrared

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Radio Frequency

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Minimal Board Space Required: 8-Pin (D or P) Package and No DIP Switches

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Internal On-Chip Oscillator Included, No External Clock Required

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CMOS 2-

µm Process Used for Very Low-Power Consumption and 3-V to 6-V Supply Voltage

•

Well Suited for All Applications Requiring Remote-Control Operation

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Garage Door Openers

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Security Systems for Auto and Home

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Electronic Keys

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Consumer Electronics

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Cable Decoder Boxes

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Industrial Controls Requiring Precise Activation of Equipment

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Electronic Serial Number (ESN) Device Identification

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