1

LTC1384

The LTC1384 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 and

driver outputs unloaded. In the Shutdown mode, the

charge pump is turned off, the driver outputs are forced

drops to 35

µA. The receiver outputs may be forced into

three-state at any time using the receiver enable (EN) pin.

The LTC1384 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.

5V Low Power RS232

Transceiver with 2 Receivers

Active in Shutdown

S

FEATURE

DESCRIPTIO

s

Operates from a Single 5V Supply

s

s

Receivers Kept Alive

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

APPLICATI

TYPICAL

S

APPLICATI

s

Notebook Computers

s

Palmtop Computers

2-Drivers/2-Receivers with Shutdown

and Receiver Enable

LTC1384 • TA01

LTC1384

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

14

232 INPUT

5k

9

232 INPUT

16

12

11

13

10

LOGIC INPUT

LOGIC INPUT

LOGIC OUTPUT

LOGIC OUTPUT

5k

18

ON/OFF

RX EN

1

300k

300k

Quiescent and Shutdown Supply Current

vs Temperature

TEMPERATURE (°C)

–20

0

200

400

600

800

1200

0

20

40

60

LTC1384 • TA02

80

1000

0

10

20

30

40

60

50

QUIESCENT

CURRENT

SHUTDOWN

CURRENT