LTC2801/LTC2802/

LTC2803/LTC2804

16

2801234fc

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

© LINEAR TECHNOLOGY CORPORATION 2005

LT 0808 REV C • PRINTED IN USA

2801F22

LTC2804

+

–

PS

MODE

10

11

13

14

15

16

4

3

2

1

5

12

T2OUT

T1OUT

R2IN

R1IN

T2IN

T1IN

R2OUT

R1OUT

CTS

RX

RTS

TX

TXD

RXD

6

8

79

SW

CAP

GND

UART

*ADDITIONAL BYPASS CAPACITOR AS NEEDED

μP

1.8V TO 5.5V

1.8V TO 5.5V

DC-DC

C2

1μF

C5

220nF

C4

1μF

*

*

17

C3

1μF

C1

220nF

L1

10μH

TYPICAL APPLICATION

Figure 22. Diagnostic Port Operating Directly Off Unregulated Battery Voltage

PART NUMBER

DESCRIPTION

COMMENTS

LT1780/LT1781

2-Driver/2-Receiver RS232 Transceiver

Single 5V Supply with 0.1μF Capacitors, 15kV ESD

LTC1337

3-Driver/5-Receiver RS232 Transceiver

Ultralow Power for DTE Applications

LTC1338

5-Driver/3-Receiver RS232 Transceiver

Ultralow Power for DCE Applications

LT1039/LT1039-16

3-Driver/3-Receiver RS232 Transceiver

30kΩ Input Impedance for Multi-Drop Applications

LTC1348

3-Driver/5-Receiver RS232 Transceiver

True RS232 Levels on 3.3V Supply

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