8

LT1237

©LINEAR TECHNOLOGY CORPORATION 1992

1237fa LT/TP 0799 2K REV A • PRINTED IN USA

APPLICATI

TYPICAL

Typical Mouse Driving Application

RELATED PARTS

PART NUMBER

DESCRIPTION

COMMENTS

LTC

Low Power RS485 Transceiver

LT1137A

3Dx/5Rx RS232 Transceiver

15kV ESD

LTC1387

RS232/RS485 Multiprotocol Transceiver

LT1780/LT1781

2Dx/2Rx RS232 Transceiver

15kV ESD

LT1785/LT1791

60V Fault Tolerant RS485 Transceiver

15kV ESD

Dimensions in inches (millimeters) unless otherwise noted.

PACKAGE DESCRIPTIO

SW Package

28-Lead Plastic Small Outline (Wide 0.300)

(LTC DWG # 05-08-1620)

0.037 – 0.045

(0.940 – 1.143)

0.004 – 0.012

(0.102 – 0.305)

0.093 – 0.104

(2.362 – 2.642)

0.050

(1.270)

TYP

0.014 – 0.019

(0.356 – 0.482)

TYP

S28 (WIDE) 0996

NOTE 1

0.697 – 0.712*

(17.70 – 18.08)

1

23

4

5

6

78

0.394 – 0.419

(10.007 – 10.643)

910

25

26

11 12

22 21 20 19 18 17 16 15

23

24

14

13

27

28

0

° – 8° TYP

NOTE 1

0.009 – 0.013

(0.229 – 0.330)

0.016 – 0.050

(0.406 – 1.270)

0.291 – 0.299**

(7.391 – 7.595)

× 45°

0.010 – 0.029

(0.254 – 0.737)

NOTE:

1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS.

THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS

DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE

DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE

*

**

1237 TA03

1.0

µF

2

× 0.1µF

0.1

µF

DB9

LT1237

1

2

3

4

5

6

7

8

9

10

11

12

13

14

DRIVER 1 OUT

RX1 IN

DRIVER 2 OUT

RX2 IN

RX3 IN

RX4 IN

DRIVER 3 OUT

RX5 IN (LOW-Q)

ON/OFF

28

27

26

25

24

23

22

21

20

19

18

17

16

15

2

× 0.1µF

DRIVER 1 IN

RX1 OUT

DRIVER 2 IN

RX2 OUT

RX3 OUT

RX4 OUT

DRIVER 3 IN

RX5 OUT (LOW-Q)

GND

DRIVER DISABLE

MOUSE

LOGIC “0”

LOGIC “0”

MOUSE DATA

LOGIC “1”

DCD

DSR

RX

RTS

TX

CTS

DTR

RI

(1)

(9)

(5)

LOGIC

OPTICS

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417