Datasheet > 驱动程序和接口 > 线路驱动器或接收器> LTC1387I

LTC1387I

更新时间： 2024-11-24 22:34:35

品牌	Logo	应用领域
凌特 - Linear		/
页数	文件大小	规格书
12页	171K
描述
Single 5V RS232/RS485 Multiprotocol Transceiver

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中文翻译

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数据手册

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LTC1387I 数据手册

LTC1387

Sing le 5V RS232/ RS485

Multip ro to c o l Tra nsc e ive r

DESCRIPTIO

EATURE

The LTC^®1387 is a low power reconfigurable CMOS bidi-

rectional transceiver. It can be configured as an RS485

differential port or as two RS232 single-ended ports. An

onboard charge pump uses four 0.1µF capacitors to

generate boosted positive and negative supplies, allowing

the RS232 drivers to meet ±5V output swing require-

ments with only a single 5V supply. A shutdown mode

reduces the I_CCsupply current to 5µA.

■

Two RS232 Transceivers or One RS485 Transceiver

Operates from a Single 5V Supply

Guaranteed Receiver Output with Inputs

Floating or Shorted to Ground

Logic Selectable Fast/Slow RS485 Driver Slew Rate

Low Supply Current: 7mA Typical

5µA Supply Current in Shutdown

Self-Testing Capability in Loopback Mode

Separate Driver and Receiver Enable Controls

Driver Maintains High Impedance in Three-State,

Shutdown or with Power Off

■

The RS232 transceivers are in full compliance with RS232

specification. The RS485 transceiver is in full compliance

with RS485 and RS422 specifications. The RS485 re-

ceiver assumes a known output state when the inputs are

floating or shorted to ground. All interface drivers feature

short-circuit and thermal shutdown protection. An enable

pin allows RS485 driver outputs to be forced into high

impedancewhichis maintainedevenwhentheoutputs are

forced beyond supply rails or the power is off. A loop back

modeallows thedriveroutputs tobeconnectedbacktothe

receiver inputs for diagnostic self-test.

■

Receiver Inputs Can Withstand ±25V

APPLICATIONS

■

Point-of-Sale Terminals

Software Selectable Multiprotocol Interface Ports

Low Power RS485/RS422/RS232/EIA562 Interface

Cable Repeaters

■

Level Translators

The LTC1387 is available in 20-pin plastic SSOP and SW

packages.

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

TYPICAL APPLICATI

LTC1387

CC2

CC1

RS485 INTERFACE

RECOUT

DR IN

RECOUT

120Ω

4000-FT 24-GAUGE TWISTED PAIR

DR IN

SLEW

DR ENABLE

ALL CAPACITORS: 0.1µF MONOLITHIC CERAMIC TYPE

LTC1387 • TA01

12 3 4 5 6 7...12

中文翻译

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与LTC1387I相关器件

型号	品牌	获取价格	描述	数据表
LTC1387IG	Linear	获取价格	Single 5V RS232/RS485 Multiprotocol Transceiver
LTC1387IG#PBF	Linear	获取价格	LTC1387 - Single 5V RS232/RS485 Multiprotocol Transceiver; Package: SSOP; Pins: 20; Temper
LTC1387IG#TR	Linear	获取价格	LTC1387 - Single 5V RS232/RS485 Multiprotocol Transceiver; Package: SSOP; Pins: 20; Temper
LTC1387IG#TRPBF	Linear	获取价格	LTC1387 - Single 5V RS232/RS485 Multiprotocol Transceiver; Package: SSOP; Pins: 20; Temper
LTC1387ISW	Linear	获取价格	Single 5V RS232/RS485 Multiprotocol Transceiver
LTC1387ISW#PBF	Linear	获取价格	LTC1387 - Single 5V RS232/RS485 Multiprotocol Transceiver; Package: SO; Pins: 20; Temperat
LTC1387ISW#TR	Linear	获取价格	LTC1387 - Single 5V RS232/RS485 Multiprotocol Transceiver; Package: SO; Pins: 20; Temperat
LTC1389	Linear Systems	获取价格	Auto-Polarity, Ultralow Voltage Step-Up Converter and Power Manager
LTC1389CSW	Linear	获取价格	IC LINE TRANSCEIVER, PDSO24, 0.300 INCH, PLASTIC, SO-24, Line Driver or Receiver
LTC1390	Linear	获取价格	8-Channel Analog Multiplexer with Serial Interface

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