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IRM7001

SIR Modulator/Demodulator

Dimensions in inches (mm)

A .393 (10.0)

.386 (9.8)

16

1

9

B

.157 (4.0) .244 (6.2)

8 .150 (3.8) .229 (5.8)

SOIC Package

.050 (1.27) BSC .068 (1.75)

.054 (1.35)

T

.019 (.49)

.014 (.35)

.009 (.25)

.004 (0.1)

R x 45擄

.009 (.25)

.008 (.19)

.049 (1.25)

7擄 .016 (.40)

FEATURES

鈥?Compliant with IrDA 1.0 Physical Layer Speci鏗乧ations

鈥?Interfaces with IrDA 1.0 Compliant IR Transceivers

鈥?Used in conjunction with Standard 16550 UART

鈥?Transmits/Receives either 1.6

碌

s or 3/16 Pulse Mode

鈥?Internal or External Clock Mode

鈥?Programmable Baud Rate

鈥?2.7鈥?.5 V Operation

鈥?16 Pin SOIC Package

APPLICATIONS

鈥?Interfaces with IR Transceivers in:

- Computer Applications:

PDAs

Dongle or other RS232 Adapter

- Telecom Application:

Modems

Fax Machines

Pagers

- Handheld Data Collection:

Industrial

Medical

Transportation

DESCRIPTION

The IRM7001 SIR-Encoder/Decoder is a CMOS modulator/

demodulator chip that is used to both encode and decode

information as per the IrDA廬 SIR (Serial InfraRed) signal mod-

ulation and demodulation scheme. This chip is designed to

work with In鏗乶eon IrDA compatible transceivers and all other

IrDA compatible transceivers. The chip contains a clock

divider circuit used to generate the 16X clock internally. This

makes it very suitable for microcontroller-based embedded

system design.

Notes:

1. Dimensions A and B are datums and T is a datum surface.

2. Dimensioning and tolerancing per ansi Y14.5M, 1982

3. Controlling dimension: millimeter.

4. Dimension A and B do not include mold protrusion.

5. Maximum mold protrusion 0.15 (0.005) per side.

Figure 1. IRM7001 pin out

IRM - 7001

16XCLK

TXD

RCV

A0

A1

A2

CLK_SEL

GND

1

2

3

4

5

6

7

8

16

15

14

13

12

1

11

10

9

V

CC

OSCIN

OSCOUT

PWR DN

PLS MOD

IR_TXD

IR_RCV

NRST

Figure 2. IRM7001 Block Diagram

TXD

SIR

ENCODE

IR_TXD

/NRST

RCV

SIR

DECODE

IR_RCV

INT_CLOCK

A0

A1

A2

16XCLK

PULSEMOD

CLK_SEL

CLOCK

DIVIDE

Document Number: 82576

Revision 17-August-01

www.vishay.com

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