Texas Instruments TMS3637P, TMS3637D Datasheet

TMS3637

Remote Control Transmitter/Receiver

Data Manual

SCTS037B
JUNE 1997

i

IMPORTANT NOTICE

Texas Instruments (TI) reserves the right to make changes to its products or to
discontinue any semiconductor product or service without notice, and advises its
customers to obtain the latest version of relevant information to verify, before placing
orders, that the information being relied on is current.

TI warrants performance of its semiconductor products and related software to the
specifications applicable at the time of sale in accordance with TI’s standard warranty.
T esting and other quality control techniques are utilized to the extent TI deems necessary
to support this warranty. Specific testing of all parameters of each device is not
necessarily performed, except those mandated by government requirements.

Certain applications using semiconductor products may involve potential risks of death,
personal injury , or severe property or environmental damage (“Critical Applications”).

TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, INTENDED,
AUTHORIZED, OR WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT
APPLICATIONS, DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS.

Inclusion of TI products in such applications is understood to be fully at the risk of the
customer. Use of TI products in such applications requires the written approval of an
appropriate TI officer . Questions concerning potential risk applications should be directed
to TI through a local SC sales office.

In order to minimize risks associated with the customer’s applications, adequate design
and operating safeguards should be provided by the customer to minimize inherent or
procedural hazards.

TI assumes no liability for applications assistance, customer product design, software
performance, or infringement of patents or services described herein. Nor does TI
warrant or represent that any license, either express or implied, is granted under any
patent right, copyright, mask work right, or other intellectual property right of TI covering
or relating to any combination, machine, or process in which such semiconductor
products or services might be or are used.

Copyright  1997, Texas Instruments Incorporated

ii

Contents

Title Page

1 Introduction 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.1 Features 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 Functional Block Diagram 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.3 Terminal Assignments 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.4 Terminal Functions 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 Specifications 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.1 Absolute Maximum Ratings Over Operating Free-Air Temperature Range 2–1. . . .

2.2 Recommended Operating Conditions 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.3 Electrical Characteristics Over Recommended Ranges of Supply Voltage

and Operating Free-Air Temperature 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.3.1 Signal Interface 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.3.2 Amplifier 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.3.3 Internal Oscillator 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.3.4 Power-On Reset 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.3.5 Write/Erase Endurance 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.4 Timing Requirements Over Recommended Ranges of Supply Voltages

and Free-Air Temperature 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.4.1 Abort/Retry 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.4.2 EEPROM Read Mode 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.4.3 EEPROM Write Mode 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.4.4 Data Input Setup and Hold Times 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.5 Switching Characteristics Over Recommended Ranges of Supply V oltages

and Free-Air Temperature 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.5.1 Normal Transmission – Internal Clock 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.5.2 Modulated Transmission – Internal Clock 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . .

3 Parameter Measurement Information 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 T ypical Characteristics 4–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5 Principles of Operation 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.1 Power-On Reset 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.2 EEPROM Memory (31 Bits) 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.2.1 Program Read Mode 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.2.2 Program Write Mode 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.3 Internal Oscillator Operation for Transmit and Receive Modes Setting

Frequency 5–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.4 Internal Oscillator Operation for Transmit and Receive Modes Sampling

Frequency 5–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.5 External Oscillator Operation for Transmit and Receive Modes 5–4. . . . . . . . . . . . . . .

5.6 Internal Amplifier/Comparator, Description and Gain Setting 5–4. . . . . . . . . . . . . . . . .

iii

5.7 Internal Amplifier/Comparator Test Mode 5–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.8 Mode and Configuration Overview 5–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.9 Transmitter Configurations 5–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.9.1 Continuous Transmitter (CC = 1) 5–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.9.2 Triggered Transmitter (CC = 0, CI = 1) 5–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.9.3 Periodic Transmitter (CC = 0, CI = 0) 5–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.10 Transmitter Modes 5–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.10.1 Normal Mode (CB = 1) 5–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.10.2 Modulated Mode (CB = 0) 5–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.10.3 Code-Train Mode (CD, CE) 5–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.11 Receiver Configurations 5–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.11.1 Valid Transmission Receiver (CG = 1, CH = 0) 5–11. . . . . . . . . . . . . . . . . . . .

5.11.2 Train Receiver (CG = 1, CH = 1, CD, CE) 5–11. . . . . . . . . . . . . . . . . . . . . . . .

5.11.3 Q-State Receiver (CG = 0, CH = 0, CD, CE) 5–12. . . . . . . . . . . . . . . . . . . . . .

5.12 Receiver Modes 5–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.12.1 Normal Mode (CB = 1) 5–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.12.2 Modulated Mode (CB = 0) 5–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.12.3 Analog Mode (CF = 0) 5–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.12.4 Logic Mode (CF = 1) 5–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.12.5 Noninverting Mode (CI = 0) or Inverting Mode (CI = 1) 5–14. . . . . . . . . . . . .

6 Application Information 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.1 General Applications 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.2 Direct-Wired Connection of Transmitter and Receiver 6–1. . . . . . . . . . . . . . . . . . . . . . .

6.2.1 Two-Wire Direct Connection 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.2.2 Four-Wire Direct Connection 6–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.3 Infrared Coupling of Transmitter/Receiver – Normal Transmission Mode 6–5. . . . . .

6.4 Infrared Coupling of Transmitter/Receiver – Modulated Transmission Mode 6–8. . .

6.5 Radio Frequency (RF) Coupling of Transmitter and Receiver 6–10. . . . . . . . . . . . . . .

6.6 RF Receiver and Decoder 6–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.7 Programming Station 6–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.8 TMS3637 Programming Station Parts Lists 6–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.9 TMS3637 Edge-Connector Pinout 6–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

iv

List of Figures

Figure Title Page

3–1 Normal Transmission – External Clock 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–2 VTR Generation 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–3 EEPROM Read Mode 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–4 EEPROM Write Mode 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–5 Data In Setup and Hold Times 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–6 Normal Transmission – Internal Clock 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–7 Modulated Transmission – Internal Clock 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4–1 Oscillator Resistance Versus Supply Voltage 4–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4–2 Oscillator Frequency Versus Oscillator Capacitance 4–1. . . . . . . . . . . . . . . . . . . . . . . . .

4–3 High-Voltage Programming Pulse 4–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5–1 EEPROM Read Mode 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5–2 EEPROM Write Mode 5–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5–3 Amplifier/Comparator Schematic 5–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5–4 OUT Waveform in Normal Transmission 5–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5–5 OUT Waveform in Modulated Mode 5–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5–6 Transmitter Configurations 5–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5–7 Receiver Configurations 5–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6–1 Two-Wire Direct Connection 6–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6–2 Four-Wire Direct Connection 6–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6–3 Four-Wire Direct Connection Key 6–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6–4 Infrared Transmitter 6–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6–5 Infrared Receiver 6–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6–6 Infrared Modulated Receiver 6–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6–7 Radio Frequency Transmitter 6–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6–8 TRF1400 RF Receiver and TMS3637 Decoder Circuit 6–12. . . . . . . . . . . . . . . . . . . . . .

6–9 Programming Station 6–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

v

List of Tables

Table Title Page

5–1 Mode and Test Configuration 5–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5–2 Transmitter Modes 5–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5–3 Receiver Modes 5–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5–4 Amplifier Test, Program, and Read Modes 5–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5–5 Code-Train Modes 5–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5–6 Transmitter/Receiver Compatibility 5–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5–7 Bits CD and CE in Train Receiver 5–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5–8 Bits CD and CE in Q-State Receiver 5–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6–1 Two-Wire Direct Connection 6–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6–2 Four-Wire Direct Connection 6–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6–3 Infrared Transmitter Component Functions (Normal Transmission Mode) 6–6. . . . . . .

6–4 Infrared Receiver Component Functions (Normal Transmission Mode) 6–7. . . . . . . . .

6–5 Infrared Receiver Component Functions (Modulated Tranmission Mode) 6–9. . . . . . .

6–6 RF Transmitter Component Functions 6–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6–7 TRF1400 RF Receiver and TCM3637 Decoder Parts List

(for 300 MHz operation) 6–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6–8 TMS3637 Programming Station Part List 6–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6–9 Edge Connector Pinout 6–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

vi

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

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

• High Security

– 4,194,304 Unique Codes Available
– Codes Stored in Nonvolatile Memory (EEPROM)
– Codes Alterable Only With a Programming Station That Ensures No Security Code

Duplications

• Versatile
– 48 Possible Configurations as a Receiver
– 18 Possible Configurations as a Transmitter
– Single, Multiple, or Continuous Cycling Transmission

• Easy Circuit Interface With Various Transmission Media
– Direct Wired
– Infrared
– Radio Frequency

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

• Internal On-Chip Oscillator Included, No External Clock Required

• 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

– Garage Door Openers
– Security Systems for Auto and Home
– Electronic Keys
– Consumer Electronics
– Cable Decoder Boxes
– Industrial Controls Requiring Precise Activation of Equipment
– Electronic Serial Number (ESN) Device Identification

1–1

1.2 Functional Block Diagram

IN

CEX

OSCR
OSCC

7

6

1
2

Amplifier

Oscillator

Power-On

Reset

Test Mode

and

High Voltage

Interface

48

GND

V

CC

GND

Logic

Circuit

Shift

Register

EEPROM

Memory

5

OUT

3

TIME

1.3 Terminal Assignments

1–2

D OR P PACKAGE

(TOP VIEW)

OSCR
OSCC

TIME

GND

1
2
3
4

V

8

CC

IN

7

CEX

6

OUT

5

1.4 Terminal Functions

I/O

DESCRIPTION

TERMINAL

NAME NO.

CEX 6 I Capacitor external. CEX is used for gain control of the internal analog amplifier. An external

GND 4 Ground
IN 7 I/O Depending on the device configuration, IN provides inverted OUT data, is used as a receiver

OSCC 2 I/O Oscillator capacitor. Depending on the configuration, OSCC is used for external transmit/receive

OSCR 1 I Oscillator resistor. Depending on the configuration, OSCR is used as an external program/

OUT 5 O OUT is an open-drain output. For that reason, it is necessary to connect a pullup resistor to OUT.

capacitor connected from CEX to GND determines the gain of the amplifier. If the internal
amplifier is set for unity gain or the device is not used as a receiver, CEX is left unconnected.

input, or is used to enter data during programming.

– When the device is configured as a transmitter , IN provides the complement of the OUT

data stream and is considered to be noninverted. IN provides its own internal pullup, so
no external pullup is required when IN is used to transmit the data. It is cleared to 0 in

standby.
– When the device is configured as a receiver , IN is used to receive the code.
– When the device is in the program mode, IN is used to enter serial data into the device

shift registers that load into the EEPROM memory.

clock input, control of the internal oscillator, to place the device into program mode, input for a
high-voltage EEPROM programming pulse, or the internal analog amplifier in the test mode.

– When the device is used as a transmitter or receiver using an external clock, the external

clock is connected directly to OSCC. (OSCR must be held low to use an external clock.)
– When the device is used as a transmitter or receiver and the internal oscillator is used,

a capacitor from OSCC to GND and a resistor from OSCR to GND determines the

free-running internal oscillator frequency. In addition, the internal oscillator triangular

waveform can be seen at OSCC in this configuration.
– When the device is in the data-loading phase of the programming mode, OSCC must be

held at VCC + 0.5 V.
– After the device has been loaded with data in the programming mode, the internal

registers transfer the data to the EEPROM permanently by applying a high-voltage

programming pulse to OSCC.
– When OSCC is held at VCC + 0.5 V and three or more low pulses are applied to OSCR,

the device is in the test mode and the output of the internal analog amplifier can be

measured at TIME.

read clock input or to control the internal clock frequency.

– When the device is in the program/read mode, OSCR is connected to an external clock.
– When the device is in the transmit or receive mode, a resistor connected from OSCR to

GND (along with a capacitor from OSCC to GND) determines the frequency of the internal

clock.

Depending on the configuration, OUT provides transmit data, acts as the output for the receiver,
or provides the serial output of the stored data in memory during the program and read modes.

– When the device is configured as a transmitter, the transmitted data is seen at OUT and

is in a 3-state output mode during standby (OUT is floating). While transmitting, the data

from OUT is considered inverted.
– When the device is configured as a valid transmission receiver (VTR) receiver, OUT

provides a VTR pulse and goes low in the standby mode.
– When the device is configured as a Q-state receiver , OUT toggles high and low each time

a valid code is received.
– During the program mode, OUT provides the current data from the EEPROM memory

when the new data is clocked into the device.

1–3

1.4 Terminal Functions (Continued)

I/O

DESCRIPTION

TERMINAL

NAME NO.

TIME 3 I/O Depending on the configuration, TIME is used for measuring the internal analog-amplifier output

V

CC

8 5-V supply voltage

in the device test mode, putting the device into the transmit mode, or controlling an internal clock
oscillator for various transmitter and receiver configurations.

– When OSCC is held at VCC + 0.5 V and three or more low pulses are applied to OSCR,

the device is in the test mode and the output of the internal analog amplifier can be

measured at TIME.
– When the device is configured as a continuous transmitter , an internal pullup is connected

to TIME. If TIME is then forced low, the device transmits codes for the duration that TIME

is held low. (TIME must be connected to an external pullup.)
– When the device is configured as a triggered transmitter and if TIME is then forced low,

the device transmits one code or a code train. (TIME must be connected to an external

pullup.)
– When the device is configured as a periodic transmitter , connect an external resistor and

capacitor between TIME and VCC to transmit code after each RC time constant has

expired.
– When the device is configured as a VTR, TIME must be held high to receive codes. The

device produces a VTR pulse on OUT after confirmation of a correct received code.

Connecting a parallel resistor and capacitor between TIME and VCC lengthens the output

pulse (VTR) duration.
– Configured as a train receiver, connect an external parallel resistor and capacitor between

TIME and VCC, which are used to set the length of time the device is looking for two, four,

or eight correct received codes to output a valid VTR pulse on OUT.
– Configured as a Q-state receiver , TIME has the same function as the VTR receiver above,

except the detection of the correct code causes OUT to toggle between the low and high

states.

1–4

2 Specifications

2.1 Absolute Maximum Ratings Over Operating Free-Air Temperature Range
(Unless Otherwise Noted)

Supply voltage range, VCC (see Note 1) –0.6 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input voltage range (except OSCC), V
Input voltage range, OSCC, V
Output voltage range, OUT, V
Operating free-air temperature range, T
Storage temperature range, T

†

Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These
are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated
under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for
extended periods may affect device reliability.

NOTE 1: Voltage values are with respect to GND.

2.2 Recommended Operating Conditions

Supply voltage, V
High-level input voltage, V
Low-level input voltage, V
Operating free-air temperature, T
Receiver supply current, analog, I
Receiver supply current, digital, I
Transmitter supply current, standby, I
Transmitter supply current, code transmission,

I

CC(code)

Programming current at OSCC, I
Oscillating period, tp0+ tp1 (see Figure 3–1) 10 1/(f
Pulse duration, logic 1 bit, tw1 (see Figure 3–1) 5 t
Pulse duration, logic 0 bit, tw2 (see Figure 3–1) 35 3 x tp0 + 4 x t
Setup time, transmitter/receiver external clock on

OSCC↓ and before IN↑, t
Pulse duration, IN high, tw3 (see Figure 3–2) 48

NOTES: 2. R

CC

IH

IL

A

CC(an)

CC(dig)

OSCC

(see Figure 3–2)

su1

is the value of the pullup resistor on TIME and C

TIME

R

. C

TIME

should not exceed 3 µF.

TIME

†

–0.6 V to V

–0.6 V to 15 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

I

–0.6 V to 15 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

O

stg

CC(stdby)

I

–25°C to 85°C. . . . . . . . . . . . . . . . . . . . . . . . . .

A

–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

MIN NOM MAX UNIT

3 6 V

VCC–0.5 V

0 0.5 V

–25 85 °C

) 200 µs

osc

p1

19 × t

152

TIME

w1

(receiver)

6 × t

w1

(receiver)

is the value of the capacitor in parallel with

p1

CC

2 mA

200 µA

13 µA

260 µA

100 µA

100 µs
700 µs

R

× C

TIME

(see Note 2)

CC

TIME

+ 0.5 V. . . . . . . . . . . . . . . . . . . . .

V

µs

µs

2–1

2.3 Electrical Characteristics Over Recommended Ranges of Supply Voltage

V

V

V

V

AVFlatband gain

V/V

and Operating Free-Air Temperature (unless otherwise noted)

2.3.1 Signal Interface

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

OL

OH

I

I

I

O

C

i

C

o

2.3.2 Amplifier

V

I(PP)

V

N(PP)

V

O

B Bandwidth

Low-level output voltage, OUT IOL < 5 mA 0.5
Low-level output voltage, OSCC 0.6 0.7
High-level output voltage, OUT IOH < 5 mA VCC–0.5
High-level output voltage, OSCC 1.2 1.6
Input current, IN VI = 0 V to 6 V ±10 µA
Output current, OUT VO = 0 V to 12 V ±10 µA
Input capacitance 10 pF
Output capacitance 5 pF

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

Peak-to-peak input voltage 3 mV
External peak-to-peak noise voltage 1 mV
Output voltage, TIME V

VI = 3 mV 15
VI = 100 mV
VI = 200 mV
CEX (nF) > 900/f
CEX not connected 1

peak to peak
peak to peak

(kHz) 200

osc

OL

V

OH

500

1000

V

kHz

2.3.3 Internal Oscillator (see Note 3)

PARAMETER MIN TYP MAX UNIT

f

Receiver frequency 10 500 kHz

RX

f

Transmitter frequency fRX/10 fRX/10 fRX/5.5 kHz

TX

Frequency spread (temperature, VCC) ± 20%

NOTE 3: Typical values are recommended whenever possible.

2.3.4 Power-On Reset

PARAMETER MIN MAX UNIT

VCC level required to trigger power-on reset 2.7 V
Power-on reset duration 40 ms

2.3.5 Write/Erase Endurance

PARAMETER MIN TYP MAX UNIT

Number of program cycles 20 10000

2–2

2.4 Timing Requirements Over Recommended Ranges of Supply Voltages
and Free-Air Temperature

2.4.1 Abort/Retry

MIN NOM MAX

Time between consecutive codes 46 x tw (transmitter)
Time out for high-level bit to abort the code 3 x tw (receiver)
Time out for low-level bit to abort the code 25 x tw (receiver)
Time between aborted code and reading of new code 3 x tw (receiver)

2.4.2 EEPROM Read Mode (see Figure 3–3)

MIN MAX UNIT

t

Setup time, OSCR high after VCC ↑ 50 ms

su2

t

Pulse width, OSCR high 10 µs

w4

t

Pulse width, OSCR low 10 µs

w5

2.4.3 EEPROM Write Mode (see Figure 3–3 and Figure 3–4)

MIN MAX UNIT

t

Setup time, OSCR high after VCC high 50 ms

su3

t

Pulse duration, OSCR high 5 µs

w6

t

Pulse duration, OSCR low 5 µs

w7

t

Valid time, data IN valid before OSCC↑ 10 µs

v

2.4.4 Data Input Setup and Hold Times (see Figure 3–5)

MIN NOM MAX UNIT

t

Setup time, data in before OSCR↓ 1 µs

su4

t

Hold time, data in after OSCR↓ 1 µs

h1

2.5 Switching Characteristics Over Recommended Ranges of Supply
Voltages and Free-Air Temperature (unless otherwise noted)

2.5.1 Normal Transmission – Internal Clock (see Figure 3–6)

PARAMETER MIN TYP MAX UNIT

t

Pulse duration, half-oscillating period for OSCC sawtooth ↑↓ 5 1/(2 x f

w8

t

Pulse duration, logic bit 1 for IN 5 t

w9

t

Pulse duration, logic bit 0 for IN 35 7 x t

w10

2.5.2 Modulated Transmission – Internal Clock

f

osc(t)

f

osc(r)

t

w(H)

t

c

t

c(total)

t

w11

t

w12

PARAMETER

Transmitter oscillator frequency 100 110 120 kHz
Receiver oscillator frequency 400 440 480 kHz
Pulse duration, high-level modulation at IN See Figure 3-7 9 1/f
Cycle time, IN See Figure 3-7 27 3 x t
Total cycle time, IN See Figure 3-7 135 5 x t
Pulse duration, logic bit 1 for IN See Figure 3-7 135 5 x t
Pulse duration, logic bit 0 for IN See Figure 3-7 945 7 x t

CONDITIOINS

TEST

MIN TYP MAX UNIT

) 100 µs

osc

w

w

osc(t)

w(H)

c
c

1050 µs

w10

150 µs
150 µs

100 µs
700 µs

10 µs
30 µs

2–3

2–4

3 Parameter Measurement Information

OSCC

t

p0

t

p1

IN

OSCC

IN

t

w1

Figure 3–1. Normal Transmission – External Clock

t

su1

Figure 3–2. VTR Generation

V

IH

V

IL

t

w2

V

IH

V

IL

t

w3

V

CC

t

OSCC

OSCR

(clock in)

5 V

su2

t

w4

t

5 V

5.5 V

4 Reset Pulses

w5

Figure 3–3. EEPROM Read Mode

3–1

V

V

V

CC

OSCR

(clock in)

(data in)

t

IN

su3

5 V

5 V

4 Reset Pulses 22 Security Bits

t

w6

t

w7

C01–C22 CA–CI

C01

C02

C03

C04

9 Configuration Bits

C22

CA

t

v

CI

15

OSCC

(previous data)

OUT

OSCC

IN

tw8t

Figure 3–4. EEPROM Write Mode

OSCR

(clock)

IN

(data in)

t

su4

Figure 3–5. Data In Setup and Hold Times

w8

t

w9

t

w10

Figure 3–6. Normal Transmission – Internal Clock

High-Voltage
Programming Pulse

t

h1

5.5

V

IH

V

IL

V

IH

V

IL

tc

3–2

t

w(H)

(total)

IN

t

c

t

w11

t

w12

Figure 3–7. Modulated Transmission – Internal Clock