LTC1348CGPBF Linear Technology Corporation, LTC1348CGPBF Datasheet

LTC1348CGPBF

Manufacturer Part Number

LTC1348CGPBF

Description

SSOP28

Manufacturer

Linear Technology Corporation

Datasheets

1.LTC1348CGPBF.pdf (8 pages)

2.LTC1348CGPBF.pdf (8 pages)

Specifications of LTC1348CGPBF

Date_code

07+

Current page: 1 of 8
Download datasheet (224Kb)

FEATURE

TYPICAL

0.1 F

PPLICATI

Low Supply Current: 600 A at 3.3V

Supply Current in Shutdown: 0.2 A

Supply Current in Receiver Alive Mode: 15 A

ESD Protection over 10kV

Operates from a Single 3V to 5.5V Supply

Operates to 120kBaud with 0.1 F Flying Capacitors

Three-State Outputs Are High Impedance When Off

Output Overvoltage Does Not Force Current

Back into Supplies

RS232 I/O Lines Can Be Forced to 25V

Without Damage

Flowthrough Architecture

Notebook Computers

Palmtop Computers

Printers

Portable Instruments

0.1 F

DR 1 OUT

DR 2 OUT

DR 3 OUT

3-Drivers/5-Receivers with Shutdown

RX1 IN

RX2 IN

RX3 IN

RX4 IN

RX5 IN

PPLICATI

LTC1348

DR 1 IN

RX1 OUT

DR 2 IN

RX2 OUT

RX3 OUT

RX4 OUT

DR 3 IN

RX5 OUT

DREN

RXEN

GND

–

LT1348 • TA01

0.1 F

3-Driver/5-Receiver Transceiver

The LTC

with very low supply current. The charge pump only

requires five 0.1 F capacitors. The LTC1348 provides full

RS232 output levels when operated over a wide supply

range of 3V to 5.5V

The transceiver operates in one of four modes: Normal,

Receiver Disable, Receiver Alive and Shutdown. In Normal

or Receiver Disable mode, I

800 A at 5V in the no load condition. In Shutdown mode,

the supply current is further reduced to 0.2 A. In Receiver

Alive mode, all five receivers are kept alive and the supply

current is 15 A. All RS232 outputs assume a high imped-

ance state in Shutdown or Receiver Alive mode or with the

power off. The receiver outputs assume a high impedance

state in Receiver Disable or with the power off.

The LTC1348 is fully compliant with all data rate and

overvoltage RS232 specifications. The transceiver oper-

ates up to 120kbaud with all drivers loaded with 1000pF,

3k . Both driver outputs and receiver inputs can be forced

to 25V without damage and can survive multiple 10kV

ESD strikes.

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

ESCRIPTIO

3.3V/5V Low Power RS232

1348 is a 3-driver/5-receiver RS232 transceiver

1.6

1.0

0.8

0.6

0.4

1.4

1.2

0.2

–40

–20

OR 5V

Supply Current

TEMPERATURE (˚C)

= 3.3V

= 5V

QUIESCENT

CURRENT

SHUTDOWN

CURRENT

is only 600 A at 3.3V and

LT1348 •TA02

LTC1348

1.6

1.0

0.8

0.6

0.4

1.4

1.2

0.2

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