Datasheet > LTC2855

LTC2855

更新时间： 2023-12-20 18:44:00

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
18页	366K
描述
具集成可通断终端的 3.3V 20Mbps RS485/RS422 收发器

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数据手册

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LTC2855 数据手册

LTC2854/LTC2855

3.3V 20Mbps RS485/RS422

Transceivers with Integrated

Switchable Termination

FEATURES

DESCRIPTION

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

RS485/RS422 transceivers operating on 3.3V supplies.

Thereceiverincludesalogic-selectable120Ωtermination,

one-eighth unit load supporting up to 256 nodes per bus

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

outputstateunderconditionsoffloatingorshortedinputs.

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)

Guaranteed Failsafe Receiver Operation Over the

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.

Entire Common Mode Range

Current Limited Drivers and Thermal Shutdown

Delayed Micropower Shutdown: 5µA Maximum (C-, I-Grade)

Power Up/Down Glitch-Free Driver Outputs

Low Operating Current: 370µA Typical in Receive Mode

EnhancedESDprotectionallowstheLTC2854towithstand

25kV(humanbodymodel)andtheLTC2855towithstand

15kV on the transceiver interface pins without latchup

or damage.

Compatible with TIA/EIA-485-A Speciﬁcations

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

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

APPLICATIONS

Low Power RS485/RS422 Transceiver

PRODUCT SELECTION GUIDE

Level Translator

PART NUMHER

DUPLEX

PACKAGE

Backplane Transceiver

LTC2854

HALF

DFN-10

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

LTC2855

FULL

SSOP-16, DFN-12

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

285455fc

For more information www.linear.com/LTC2854

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