Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLinear ICsTIR1000IPWR

TIR1000, TIR1000I

STANDALONE IrDA ENCODER AND DECODER

SLLS228F – DECEMBER 1995 – REVISED JULY 1999

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Adds Infrared (IR) Port to Universal

Asynchronous Receiver Transmitter

(UART)

Compatible With Infrared Data Association

(IrDA) and Hewlett Packard Serial Infrared

(HPSIR)

Provides 1200 bps to 115 kbps Data Rate

Operates From 2.7 V to 5.5 V

Provides Simple Interface With UART

Decodes Negative or Positive Pulses

Available in Two 8-Terminal Plastic Small

Outline Packages (PSOP), PS Package Has

Slightly Larger Dimensions Than PW

Package

description

The TIR1000 serial infrared (SIR) encoder/

decoder is a CMOS device which encodes and

decodes bit data in conformance with the IrDA

specification.

A transceiver device is needed to interface to the photo-sensitive diode (PIN) and the light emitting diode (LED).

A UART is needed to interface to the serial data lines.

Terminal Functions

TERMINAL

I/O

DESCRIPTION

NAME NO.

I/O

DESCRIPTION

16XCLK 1 I Clock signal. 16XCLK should be set to 16 times the baud rate. The highest baud rate for IrDA is 115.2 kbps for which the

clock frequency equals 1.843 MHz (this terminal is tied to the BAUDOUT of a UART).

GND 4 Ground

IR_RXD 6 I Infrared receiver data. IR_RXD is an IrDA-SIR-modulated input from an optoelectronics transceiver whose input pulses

should be 3/16 of the baud rate period.

IR_TXD 7 O Infrared transmitter data. IR_TXD is an IrDA-SIR-modulated output to an optoelectronics transceiver.

RESET 5 I Active high reset. RESET initializes an IrDA-SIR-decode/encode state machine (this terminal is tied to a UART reset

line).

U_RXD 3 O Receiver data. U_RXD is decoded (demodulated) data from IR_RXD according to the IrDA specification (this terminal is

tied to SIN of a UART).

U_TXD 2 I Transmitter data. U_TXD is encoded (modulated) data and output data as IR_TXD (this terminal is tied to SOUT from a

UART).

8 Supply voltage

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

IrDA is a re

istered trademark of the Infrared Data Association.

functional block diagram

16XCLK

U_TXD

U_RXD

GND

IR_TXD

IR_RXD

RESET

PS OR PW PACKAGE

(TOP VIEW)

Decoder

Encoder

RESET

IR_RXD

16XCLK

U_TXD

U_RXD

IR_TXD

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Summary of content (14 pages)

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TIR1000, TIR1000I STANDALONE IrDA ENCODER AND DECODER SLLS228F – DECEMBER 1995 – REVISED JULY 1999 D D D D D D D Adds Infrared (IR) Port to Universal Asynchronous Receiver Transmitter (UART) Compatible With Infrared Data Association (IrDA) and Hewlett Packard Serial Infrared (HPSIR) Provides 1200 bps to 115 kbps Data Rate Operates From 2.7 V to 5.
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TIR1000, TIR1000I STANDALONE IrDA ENCODER AND DECODER SLLS228F – DECEMBER 1995 – REVISED JULY 1999 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage range, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 6 V Input voltage range at any input, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to VCC + 0.
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TIR1000, TIR1000I STANDALONE IrDA ENCODER AND DECODER SLLS228F – DECEMBER 1995 – REVISED JULY 1999 switching characteristics PARAMETER tr tf TEST CONDITIONS MIN TYP† MAX UNIT Output rise time C(LOAD) = 15 pF (10% to 90%) 1.3 ns Output fall time C(LOAD)= 15 pF (90% to 10%) 1.8 ns † Typical values are at TA = 25°C. APPLICATION INFORMATION Optoelectronics TIR1000, TIR1000I TL16C550C UART U_TXD SOUT U_RXD SIN IR_TXD To LED From TERMINAL IR_RXD 16XCLK RESET BAUDOUT RESET Figure 1.
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TIR1000, TIR1000I STANDALONE IrDA ENCODER AND DECODER SLLS228F – DECEMBER 1995 – REVISED JULY 1999 PRINCIPLES OF OPERATION IrDA encoder function Serial data from a UART is encoded to transmit data to the optoelectronics. While the serial data input to this block (U_TXD) is high, the output (IR_TXD) is always low, and the counter used to form a pulse on IR_TXD is continuously cleared. After U_TXD resets to 0, IR_TXD rises on the falling edge of the seventh 16XCLK.
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TIR1000, TIR1000I STANDALONE IrDA ENCODER AND DECODER SLLS228F – DECEMBER 1995 – REVISED JULY 1999 PRINCIPLES OF OPERATION IrDA encoder function (continued) It is possible for jitter or slight frequency differences to cause the next falling edge on IR_RXD to be missed for one 16XCLK cycle. In that case, a 1-clock-wide pulse appears on U_RXD between consecutive zeroes. It is important for the UART to strobe U_RXD in the middle of the bit time to avoid latching this 1-clock-wide pulse.
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TIR1000, TIR1000I STANDALONE IrDA ENCODER AND DECODER SLLS228F – DECEMBER 1995 – REVISED JULY 1999 PRINCIPLES OF OPERATION IrDA encoder function (continued) The TIR1000 and TIR1000I can decode positive pulses on IR_RXD. The timing is different, but the variation is invisible to the UART. The decoder, which works from the falling edge, now recognizes a zero on the trailing edge of the pulse rather than on the leading edge.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 11-Apr-2013 Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.
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PACKAGE MATERIALS INFORMATION www.ti.com 22-Oct-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant TIR1000IPSR SO PS 8 2000 330.0 16.4 8.2 6.6 2.5 12.0 16.0 Q1 TIR1000IPWR TSSOP PW 8 2000 330.0 12.4 7.0 3.6 1.6 8.0 12.0 Q1 TIR1000PWR TSSOP PW 8 2000 330.0 12.4 7.0 3.6 1.6 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 22-Oct-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TIR1000IPSR SO PS 8 2000 367.0 367.0 38.0 TIR1000IPWR TSSOP PW 8 2000 367.0 367.0 35.0 TIR1000PWR TSSOP PW 8 2000 367.0 367.0 35.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.