1

LTC1350

3.3V Low Power

EIA/TIA-562 3-Driver/

5-Receiver Transceiver

S

FEATURE

DESCRIPTIO

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Low Supply Current

300

µA

s

Receivers 4 and 5 Kept Alive

in SHUTDOWN

35

µA

s

ESD Protection

±10kV

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Operates from a Single 3.3V Supply

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Uses Small Capacitors

0.1

µF

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Operates to 120k Baud

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Three-State Outputs are High Impedance

When Off

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Output Overvoltage Does Not Force Current

Back into Supplies

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EIA/TIA-562 I/O Lines Can Be Forced to

±25V

Without Damage

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Flowthrough Architecture

The LTC1350 is a 3-driver/5-receiver EIA/TIA-562 trans-

ceiver with very low supply current. In the no load condi-

tion, the supply current is only 300

µA. The charge pump

only requires four 0.1

µF capacitors.

In SHUTDOWN mode, two receivers are kept alive and

the supply current is only 35

µA. All RS232 outputs

assume a high impedance state in SHUTDOWN or with

the power off.

The LTC1350 is fully compliant with all data rate and

overvoltage EIA/TIA-562 specifications. The transceiver

can operate up to 120k baud with a 1000pF and 3k

Ω

load. Both driver outputs and receiver inputs can be

forced to

±25V without damage and can survive multiple

±10kV ESD strikes.

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APPLICATI

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Notebook Computers

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Palmtop Computers

APPLICATI

TYPICAL

3-Drivers/5-Receivers with Shutdown

Quiescent and Shutdown Supply Current vs Temperature

1

2

3

4

5

6

7

8

9

10

11

12

13

14

DR1 OUT

RX1 IN

DR2 OUT

RX2 IN

RX3 IN

RX4 IN

DR3 OUT

RX5 IN

ON/OFF

NC

28

27

26

25

24

23

22

21

20

19

18

17

16

15

DR1 IN

RX1 OUT

DR2 IN

RX2 OUT

RX3 OUT

RX4 OUT

DR3 IN

RX5 OUT

GND

NC

NC

LTC1350

LTC1350 • TA01

TEMPERATURE (˚C)

–40

400

500

600

20

60

LTC1350 • TA02

300

200

–20

0

40

80

100

100

0

65

75

85

55

45

35

0

QUIESCENT

CURRENT

SHUTDOWN CURRENT