Datasheet > LTC2857

LTC2857

更新时间： 2024-01-12 23:09:23

品牌	Logo	应用领域
凌特 - Linear		/
页数	文件大小	规格书
16页	218K
描述
3.3V 20Mbps RS485/RS422 Transceivers with Integrated Switchable Termination

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中文翻译

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数据手册

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LTC2857 数据手册

LTC2854/LTC2855

3.3V 20Mbps RS485/RS422

Transceivers with Integrated

Switchable Termination

DESCRIPTION

FEATURES

The LTC^®2854 and LTC2855 are low power, 20Mbps

RS485/RS422 transceivers operating on 3.3V supplies.

The receiver includes a logic-selectable 120Ω termina-

tion, one-eighth unit load supporting up to 256 nodes per

bus (C, I-Grade), and a failsafe feature that guarantees a

high output state under conditions of ﬂoating or shorted

inputs.

■

Integrated, Logic-Selectable 120Ω Termination

Resistor

■

3.3V Supply Voltage

■

20Mbps Maximum Data Rate

■

No Damage or Latchup Up to 2ꢀ5V ꢁHM

■

ꢁigh Input Impedance Supports 2ꢀ6 Nodes

(C, I-Grade)

Operation Up to 12ꢀ°C (ꢁ-Grade)

■

The driver maintains a high output impedance over the

entire common mode range when disabled or when the

supplyisremoved.Excessivepowerdissipationcausedby

bus contention or a fault is prevented by current limiting

all outputs and by a thermal shutdown.

■

Guaranteed Failsafe Receiver Operation Over the

Entire Common Mode Range

■

Current Limited Drivers and Thermal Shutdown

■

Delayed Micropower Shutdown: 5μA Maximum

(C, I-Grade)

■

EnhancedESDprotectionallowstheLTC2854towithstand

25ꢀV(humanbodymodel)andtheLTC2855towithstand

15ꢀV on the transceiver interface pins without latchup

or damage.

Power Up/Down Glitch-Free Driver Outputs

■

Low Operating Current: 370μA Typical in

Receive Mode

■

Compatible with TIA/EIA-485-A Speciﬁcations

■

Available in 10-Pin 3mm × 3mm DFN, 12-Pin

4mm × 3mm DFN and 16-Pin SSOP Pacꢀages

PRODUCT SELECTION GUIDE

APPLICATIONS

PART NUMHER

DUPLEX

PACKAGE

LTC2854

HALF

DFN-10

■

Low Power RS485/RS422 Transceiver

Level Translator

LTC2855

FULL

SSOP-16, DFN-12

■

Bacꢀplane Transceiver

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

All other trademarks are the property of their respective owners.

TYPICAL APPLICATION

LTC28ꢀ4 at 20Mbps into ꢀ4

LTC2854

120Ω

2V/DIV

A-B

285455 TA01

LTC2854

120Ω

285455 TA01b

20ns/DIV

RO RE TE DE DI

285455fa

12 3 4 5 6 7...16

中文翻译

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与LTC2857相关器件

型号	品牌	获取价格	描述	数据表
LTC2857-1	Linear	获取价格	20Mbps and Slew Rate Limited 15kV RS485/RS422 Transceivers
LTC2857-1_15	Linear	获取价格	20Mbps and Slew Rate Limited 15kV RS485/RS422 Transceivers
LTC2857-2	Linear	获取价格	20Mbps and Slew Rate Limited 15kV RS485/RS422 Transceivers
LTC2857-2_15	Linear	获取价格	20Mbps and Slew Rate Limited 15kV RS485/RS422 Transceivers
LTC2857CDD-1	Linear	获取价格	20Mbps and Slew Rate Limited 15kV RS485/RS422 Transceivers
LTC2857CDD-1#PBF	Linear	获取价格	LTC2857 - 20Mbps and Slew Rate Limited 15kV RS485/RS422 Transceiver; Package: DFN; Pins: 8
LTC2857CDD-1#TR	Linear	获取价格	暂无描述
LTC2857CDD-1#TRPBF	Linear	获取价格	LTC2857 - 20Mbps and Slew Rate Limited 15kV RS485/RS422 Transceiver; Package: DFN; Pins: 8
LTC2857CDD-2	Linear	获取价格	20Mbps and Slew Rate Limited 15kV RS485/RS422 Transceivers
LTC2857CDD-2#PBF	Linear	获取价格	LTC2857 - 20Mbps and Slew Rate Limited 15kV RS485/RS422 Transceiver; Package: DFN; Pins: 8

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