1

LTC1382

5V Low Power

RS232 Transceiver

with Shutdown

S

FEATURE

DESCRIPTIO

s

Operates from a Single 5V Supply

s

s

s

ESD Protection Over

±10kV

s

Uses Small Capacitors: 0.1

µF

s

Operates to 120kBaud

s

Output Overvoltage Does Not Force Current

Back into Supplies

s

RS232 I/O Lines Can Be Forced to

±25V

Without Damage

s

Pin Compatible with LT1180A

The LTC1382 is an ultra-low power 2-driver/2-receiver

RS232 transceiver that operates from a single 5V

supply. The charge pump requires only four space-

saving 0.1

µF capacitors.

The transceiver operates in one of two modes, Normal

with the driver outputs unloaded. In the Shutdown

mode, the charge pump is turned off, the driver outputs

are forced into three-state, both receivers are off and

The LTC1382 is fully compliant with all data rate and

overvoltage RS232 specifications. The transceiver can

operate up to 120kbaud with a 2500pF, 3k

Ω load. Both

driver outputs and receiver inputs can be forced to

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

ESD strikes.

S

APPLICATI

s

Notebook Computers

s

Palmtop Computers

APPLICATI

TYPICAL

TEMPERATURE (°C)

–20

0

100

200

300

400

600

0

20

40

60

LTC1382 • TA02

80

500

0

0.2

0.4

0.6

0.8

1.2

1.0

QUIESCENT

CURRENT

SHUTDOWN

CURRENT

Quiescent and Shutdown Supply Current

vs Temperature

2-Drivers/2-Receivers with Shutdown

LTC1382 • TA01

LTC1382

2

4

0.1

µF

17

3

0.1

µF

7

0.1

µF

0.1

µF

5

6

232 OUTPUT

15

8

232 OUTPUT

300k

14

232 INPUT

5k

9

232 INPUT

16

12

11

13

10

LOGIC INPUT

LOGIC INPUT

LOGIC OUTPUT

LOGIC OUTPUT

300k

5k

18

ON/OFF