LTC2850_15 Datasheet, PDF (1/18 Pages) Linear Technology – 3.3V 20Mbps RS485/RS422 Transceivers

Features
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
Applications
n _{Low Power RS485/RS422 Transceiver}
n _{Level Translator}
n _{Backplane Transceiver}
Typical Application
LTC2850
RO1
R
RE1
DE1
DI1
D
V_CC1
R_T
GND1
LTC2850
RO2
R
RE2
R_T
V_CC2
DE2
DI2
D
GND2
285012 TA01a
LTC2850/LTC2851/LTC2852
3.3V 20Mbps RS485/RS422
Transceivers
Description
The LTC^®2850, LTC2851 and LTC2852 are low power,
20Mbps RS485/RS422 transceivers operating on 3.3V
supplies. 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
up to ±15kV (human body model) on the transceiver
interface pins without latchup or damage.
PART NUMBER
LTC2850
LTC2851
LTC2852
DUPLEX
Half
Full
Full
PACKAGE
SO-8, MSOP-8, DFN-8
SO-8, MSOP-8, DFN-8
SO-14, MSOP-10, 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.
LTC2850 at 20Mbps Into 54Ω
DI
A
2V/DIV
B
A-B
20ns/DIV
285012 TA01b
285012fd