1

LTC1350

1350fa

3.3V Low Power

EIA/TIA-562 3-Driver/

5-Receiver Transceiver

■

Low Supply Current: 300µA

■

Receivers 4 and 5 Kept Alive

in Shutdown: 35µA

■

ESD Protection: ±10kV

■

Operates from a Single 3.3V Supply

■

Uses Small Capacitors: 0.1µF

■

Operates to 120kBaud

■

Three-State Outputs are High Impedance

When Off

■

Output Overvoltage Does Not Force Current

Back into Supplies

■

EIA/TIA-562 I/O Lines Can Be Forced to ±25V

Without Damage

■

Flowthrough Architecture

The LTC

transceiver with very low supply current. In the no load

condition, the supply current is only 300µA. The charge

pump only requires four 0.1µF capacitors.

In Shutdown mode, two receivers are kept alive and the

supply current is only 35µA. 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 120kbaud with a 1000pF and 3kΩ load.

Both driver outputs and receiver inputs can be forced to

±25V without damage and can survive multiple ±10kV

ESD strikes.

■

Notebook Computers

■

Palmtop Computers

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

FEATURES

APPLICATIO S

DESCRIPTIO

TYPICAL APPLICATIO

, LTC and LT are registered trademarks of Linear Technology Corporation.