Home

LTC1318| Datasheet

By datasheet - November 4th, 2008

LTC1318| Datasheet

Datasheet preview, take a look at Datasheets before downloading (Data Sheet is available on manufacturer site)


LTC1318
OBSOLETE:

Contact Linear Technology for Potential Replacement

FOR INFORMATION PURPOSES ONLY

Single 5V RS232/RS422/AppleTalk DCE Transceiver

I

I I I

I I I I

Single Chip Provides DCE RS232 or RS422/AppleTalk DCE Port Operates from a Single 5V Supply Charge Pump Uses 0.1uF Capacitors Output Common-Mode Voltage Range Exceeds Power Supply Rails for All Drivers Driver Outputs Are High Impedance with Power Off Pin Selectable RS232/RS422 Receiver Thermal Shutdown Protection Drivers Are Short-Circuit Protected

The LTC 1318 is a single 5V, RS232/RS422 transceiver for connection to the DCE, or peripheral side of an interface link. It includes an on-board charge pump to generate a 8V supply which allows true RS232 output swings. The charge pump requires only four external 0.1uF capacitors. The LTC1318 includes two RS232 drivers, a differential RS422 driver, a dedicated RS232 receiver, and a pin selectable RS232/RS422 receiver which can receive either single-ended or differential signals. The LTC1318 features driver outputs which can be taken to common-mode voltages outside the power supply rails without damage. Additionally, the driver outputs assume a high impedance state when the power is shut off, preventing externally applied signals from feeding back into the power supplies. The RS232 devices will operate at speeds up to 100kbaud. The RS422 devices will operate up to 2Mbaud. The LTC1318 is available in a 24-lead SO Wide package.
, LTC and LT are registered trademarks of Linear Technology Corporation. AppleTalk and LocalTalk are registered trademarks of Apple Computer, Inc.

APPLICATIONS
I I I

Dual-Mode RS232/RS422 Peripherals AppleTalk Peripherals Single 5V Systems

TYPICAL APPLICATIONS
0.1uF 0.1uF

V+ C1 + C1

V CHARGE PUMP C2 C2 + RXO1 TXI1 TXI2 GND RS422 RXDO/RXO2 TXD RS232 RXMODE GND LTC1318 NC
LT1318 TA01

0.1uF 0.1uF

TXD (5V/DIV)

RXI1 RS232 RS232 LINES TXO1 RS232 TXO2 RS232 5V VCC RXD
+

1k 1k APPLETALK NETWORK

22

22 22

TO DIGITAL SYSTEM

TXD+, TXD (2V/DIV) RXDO (5V/DIV)

RXD /RXI2 22 TXD +

22 22 LOCALTALK TRANSFORMER

22 22

TXD RS422 NC

100pF 4

U

FEATURES

DESCRIPTION

U

U

Driver Output Waveforms

RL = 100 CL = 100pF

200ns/DIV

1318 TA02

1


LTC1318 Datasheet linear Download PDF

Add this permalink to your bookmarks for future download of LTC1318 datasheet

Permalink: http://datasheet.emcelettronica.com/linear/LTC1318