LTC2850/LTC2851/LTC2852



285012fd

Typical applicaTion

FeaTures

applicaTions

DescripTion

3.3V 20Mbps RS485/RS422

Transceivers

20Mbps RS485/RS422 transceivers operating on 3.3V

supplies.Thereceiverhasaone-eighthunitloadsupporting

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.

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 thermal shutdown.

Enhanced ESD protection allows these parts to withstand

up to ±15kV (human body model) on the transceiver

interface pins without latchup or damage.

LTC2850 at 20Mbps Into 54Ω

n

3.3V Supply Voltage

n

20Mbps Maximum Data Rate

n

No Damage or Latchup Up to ±15kV HBM

n

High Input Impedance Supports 256 Nodes

(C, I‑Grade)

n

Operation Up to 125°C (H‑Grade)

n

Guaranteed Failsafe Receiver Operation Over the

Entire Common Mode Range

n

Current Limited Drivers and Thermal Shutdown

n

Delayed Micropower Shutdown: 5µA Maximum

(C, I-Grade)

n

Power Up/Down Glitch-Free Driver Outputs

n

Low Operating Current: 370µA Typical in

Receive Mode

n

Compatible with TIA/EIA-485-A Specifications

n

Available in 8-Pin and 10-Pin 3mm

× 3mm DFN,

8-Pin and 10-Pin MSOP, and 8-Pin and 14-Pin

SO Packages

n

Low Power RS485/RS422 Transceiver

n

Level Translator

n

Backplane Transceiver

GND1

R

RO1

RE1

DE1

DI1

D

LTC2850

LTC2850

285012 TA01a

GND2

R

RO2

RE2

DE2

DI2

D

PART NUMBER

DUPLEX

PACKAGE

LTC2850

Half

SO-8, MSOP-8, DFN-8

LTC2851

Full

SO-8, MSOP-8, DFN-8

LTC2852

Full

SO-14, MSOP-10, DFN-10

20ns/DIV

2V/DIV

285012 TA01b

DI

A

B

A-B

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.