LTC1321CS Linear Technology Corporation, LTC1321CS Datasheet

LTC1321CS

Manufacturer Part Number

LTC1321CS

Description

2-EIA562/RS232 transceiver /2-RS485 transceiver

Manufacturer

Linear Technology Corporation

Datasheet

1.LTC1321CS.pdf (20 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

LTC1321CS

Manufacturer:

LINEAR/凌特

Quantity:

20 000

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LTC1321CSW#PBF

Manufacturer:

Vishay

Quantity:

14 827

Company:

Meier Automation Equipment Co., Limited

Part Number:

LTC1321CSW#PBF

Manufacturer:

LINEAR/凌特

Quantity:

20 000

Current page: 1 of 20
Download datasheet (357Kb)

FEATURE

TYPICAL

APPLICATIONS

LTC1321: 2-EIA562/RS232 Transceivers/2-RS485

Transceivers

LTC1322: 4-EIA562/RS232 Transceivers/2-RS485

Transceivers

LTC1335: 4-EIA562 Transceivers/2-RS485

Transceivers with OE

LTC1321/LTC1322 Have the Same Pinout as

SP301/SP302

LTC1335 Features Receiver Three-State Outputs

Low Supply Current: 1mA Typical

15 A Supply Current in Shutdown

120kBaud in EIA/TIA-562 or RS232 Mode

10MBaud in RS485/RS422 Mode

Self-Testing Capability in Loopback Mode

Power-Up/Down Glitch-Free Outputs

Driver Maintains High Impedance in Three-State,

Shutdown or With Power Off

Thermal Shutdown Protection

I/O Lines Can Withstand 25V

Withstands Repeated 10kV ESD Pulses

Low Power RS485/RS422/EIA562/RS232 Interface

Cable Repeater

Level Translator

CC1

PPLICATI

DR ENABLE

RX OUT

–5V

RX OUT

EE1

RX OUT

DR IN

LTC1322

120

4000-FT 24-GAUGE TWISTED PAIR

RS485 INTERFACE

EIA562 INTERFACE

The LTC1321/LTC1322/LTC1335 are low power CMOS

bidirectional transceivers, each featuring two reconfigurable

interface ports. Each can be configured as two RS485

differential ports, as two single-ended ports, or as one

RS485 differential port and one single-ended port. The

LTC1321/LTC1322 can provide RS232 or EIA562 compat-

ible single-ended outputs; the LTC1335 provides EIA562

compatible outputs and additionally includes an output

enable pin, allowing the receiver logic level outputs to be

three-stated.

The RS232/EIA562 transceivers operate to 120kbaud and

are in full compliance with EIA/TIA-562 specification. The

RS485 transceivers operate to 10Mbaud and are in full

compliance with RS485 and RS422 specifications. All

interface drivers feature short-circuit and thermal shut-

down protection. An enable pin allows RS485 driver

outputs to be forced into high impedance which is main-

tained even when the outputs are forced beyond supply

rails or power is off. Both driver outputs and receiver

inputs feature 10kV ESD protection. A loopback mode

connects the driver outputs back to the receiver inputs for

diagnostic self-test.

The LTC1321/LTC1322 can support RS232 voltage levels

when 6.5V

LTC1335 supports receiver output enable but not RS232

levels. A shutdown mode reduces the I

to 15 A.

ESCRIPTIO

120

LTC1321/LTC1322/LTC1335

RS232/EIA562/RS485

10V and – 6.5V

LTC1322

Transceivers

RX OUT

DR ENABLE

DR IN

RX OUT

DR IN

–5V

EE2

1321/22/35 TA01

supply current

CC2

– 10V. The

Related parts for LTC1321CS

LTC1321CS Summary of contents

Page 1

FEATURE S LTC1321: 2-EIA562/RS232 Transceivers/2-RS485 Transceivers LTC1322: 4-EIA562/RS232 Transceivers/2-RS485 Transceivers LTC1335: 4-EIA562 Transceivers/2-RS485 Transceivers with OE LTC1321/LTC1322 Have the Same Pinout as SP301/SP302 LTC1335 Features Receiver Three-State Outputs Low Supply Current: 1mA Typical 15 A Supply Current in Shutdown 120kBaud ...

Page 2

... PLASTIC DIP 24-LEAD PLASTIC SOL T = 125 C/W (N) JMAX 125 C/W (S) JMAX JA ORDER PART NUMBER LTC1321CN LTC1321CS LTC1321IN LTC1321IS Consult factory for Military grade parts Output Voltage Drivers ................................................. – 25V to 25V Receivers ............................... – 0. Output Short-Circuit Duration ......................... Indefinite Operating Temperature Range + 0 ...

Page 3

DC ELECTRICAL CHARACTERISTICS (LTC1321/LTC1322 5 SYMBOL PARAMETER RS485 Driver (SEL1 = SEL2 = HIGH) V Differential Driver Output Voltage (Unloaded) OD1 V Differential Driver Output Voltage (With Load) OD2 V Change in ...

Page 4

LTC1321/LTC1322/LTC1335 DC ELECTRICAL CHARACTERISTICS (LTC1321/LTC1322 5 SYMBOL PARAMETER Supply Currents I V Supply Current Supply Current (LTC1321/LTC1322 Supply Current ELECTRICAL ...

Page 5

W U TYPICAL PERFORMANCE CHARACTERISTICS RS485 Driver Differential Output Voltage vs Temperature 2 2.5 2.4 2.3 2.2 2.1 2.0 1.9 1.8 1.7 1.6 – 125 –25 100 TEMPERATURE (°C) 1321 G01 RS485 ...

Page 6

LTC1321/LTC1322/LTC1335 W U TYPICAL PERFORMANCE CHARACTERISTICS Receiver Output High Voltage vs Temperature 5 3mA OUT 4.9 4.8 4.7 4.6 4.5 4.4 4.3 4.2 4.1 4.0 –50 – 100 125 TEMPERATURE (°C) 1321 G10 Receiver ...

Page 7

CTIO S LTC1321 V (Pin 1): Positive Supply Input for EIA/TIA-562 Drivers. DD B1: (Pin 2): Receiver Input. A1 (Pin 3): Receiver Input. Z1 (Pin 4): Driver Output. Y1 (Pin 5): Driver Output. SEL1 (Pin ...

Page 8

LTC1321/LTC1322/LTC1335 CTIO TABLES LTC1321 RS485 Driver Mode INPUTS LINE ON/OFF SEL DE D CONDITION Fault Fault Fault ...

Page 9

CTIO TABLES LTC1335 RS485 Driver Mode INPUTS LINE ON/OFF SEL DE D CONDITION Fault Fault Fault ...

Page 10

LTC1321/LTC1322/LTC1335 W BLOCK DIAGRA SM PORT 1 = EIA562 MODE PORT 2 = EIA562 MODE SEL1 Y1 LB *SEL1 7 18 ...

Page 11

W BLOCK DIAGRA SM LTC1322/LTC1335 Interface Configuration With Loopback PORT 1 = EIA562 MODE PORT 2 = EIA562 MODE / ...

Page 12

LTC1321/LTC1322/LTC1335 U SWITCHI G WAVEFOR – Z – OD2 A – B ...

Page 13

U SWITCHI G WAVEFOR PPLICATI S I FOR ATIO Basic Theory of ...

Page 14

LTC1321/LTC1322/LTC1335 PPLICATI S I FOR ATIO LB pin has a LOW logic state. The driver outputs are not isolated from the external loads. This allows transmitter verification under the loaded condition. An internal 4 A current ...

Page 15

PPLICATI S I FOR ATIO TXD – TXD TXI RFI + 16 TXD 3 TXDEN RFI RXEN 13 6 RXO 12 7 RXO – RXD ...

Page 16

LTC1321/LTC1322/LTC1335 TYPICAL PPLICATI A typical EIA562/RS232 interface application is shown in Figure 17 with LTC1322. A typical EIA562 interface appli- cation with LTC1335 is shown in Figure 18. A typical connection for RS485 transceiver is shown in ...

Page 17

O U TYPICAL A PPLICATI A typical RS422 connection shown in Figure 20 allows one driver and ten receivers on a twisted pair of wires termi- nated with a 100 resistor at one end. The ground shield is optional. 1/2 ...

Page 18

LTC1321/LTC1322/LTC1335 O U TYPICAL A PPLICATI The LTC1322/LTC1335 can be used to translate EIA562 to RS422 interface level or vice versa as shown in Figure 22. One port is configured as EIA562 transceiver and the other as RS485 transceiver. The ...

Page 19

... Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. U Dimensions in inches (millimeters) unless otherwise noted ...

Page 20

... Rm. 801, No. 46, Sec. 2 Chung Shan N. Rd. Taipei, Taiwan, R.O.C. Phone: 886-2-521-7575 FAX: 886-2-562-2285 UNITED KINGDOM Linear Technology (UK) Ltd. The Coliseum, Riverside Way Camberley, Surrey GU15 3YL United Kingdom Phone: 44-276-677676 FAX: 44-276-64851 LT/GP 0594 10K • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1994 ...

Related keywords

LTC1321CS datasheet
LTC1321CS data sheet
LTC1321CS pdf datasheet
LTC1321CS component
LTC1321CS part
LTC1321CS distributor
LTC1321CS RoHS
LTC1321CS datasheet download