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LTC2856-1

Description
20Mbps and Slew Rate Limited 15kV RS485/RS422 Transceivers
File Size229KB,20 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
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LTC2856-1 Overview

20Mbps and Slew Rate Limited 15kV RS485/RS422 Transceivers

LTC2856-1/LTC2856-2
LTC2857-1/LTC2857-2
LTC2858-1/LTC2858-2
20Mbps and Slew Rate
Limited 15kV RS485/RS422
Transceivers
DESCRIPTION
The LTC
®
2856-1, LTC2856-2, LTC2857-1, LTC2857-2,
LTC2858-1 and LTC2858-2 are low power, RS485/RS422
transceivers operating on 5V supplies at maximum data
rates of 20Mbps or 250kbps for low EMI. The receiver has
a 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.
The driver maintains a high output impedance over the
entire common mode range when disabled or when the
supply is removed. Excessive power dissipation caused by
bus contention or a fault is prevented by current limiting
all outputs and by thermal shutdown.
Enhanced ESD protection allows these parts to withstand
±15kV (human body model) on the transceiver interface
pins without latchup or damage.
PART
NUMBER
LTC2856-1
LTC2856-2
LTC2857-1
LTC2857-2
LTC2858-1
LTC2858-2
MAX DATA
RATE (Mbps)
20
0.25
20
0.25
20
0.25
DUPLEX
Half
Half
Full
Full
Full
Full
PACKAGE
MSOP-8, DFN-8
MSOP-8, DFN-8
MSOP-8, DFN-8
MSOP-8, DFN-8
MSOP-10, DFN-10
MSOP-10, DFN-10
FEATURES
20Mbps or Low EMI 250kbps Maximum Data Rate
No Damage or Latchup to ESD: ±15kV HBM
High Input Impedance Supports 256 Nodes
(C, I-Grade)
Operation Up to 125°C (H-Grade)
Guaranteed Failsafe Receiver Operation Over the
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: 900μA Maximum in Receive
Mode
Compatible with TIA/EIA-485-A Specifications
Available in 8-Lead and 10-Lead 3mm
×
3mm DFN
and 8-Lead and 10-Lead MSOP Packages
APPLICATIONS
Low Power RS485/RS422 Transceiver
Level Translator
Backplane Transceiver
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
LTC2856-1
RO1
RE1
DE1
DI1
D
GND1
2V/DIV
R
V
CC1
R
T
LTC2858-1 at 20Mbps
DI
Y
Z
LTC2856-1
RO2
RE2
DE2
DI2
D
GND2
285678 TA01a
R
V
CC2
R
T
Y-Z
20ns/DIV
2856 TA01b
285678fe
1

LTC2856-1 Related Products

LTC2856-1 LTC2857-2 LTC2856-2 LTC2857-1
Description 20Mbps and Slew Rate Limited 15kV RS485/RS422 Transceivers 20Mbps and Slew Rate Limited 15kV RS485/RS422 Transceivers 20Mbps and Slew Rate Limited 15kV RS485/RS422 Transceivers 20Mbps and Slew Rate Limited 15kV RS485/RS422 Transceivers
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