RS485/422 Transceivers operate up to 20 MBps or 250 Kbps.October 5, 2006 -
Operating on 5 V supplies, LTC2856/LTC2857/LTC2858 transceivers control high-frequency emission from equipment and data cables. ESD protection allows ICs to withstand ±15 kV without latchup or damage, and receiver fail-safe feature ensures high output state under conditions of floating or shorted inputs. Receivers have 1/8 unit load, supporting up to 256 devices on bus, while drivers maintain output impedance over entire common mode range when disabled or when supply is removed.
(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)
Original Press release
Linear Technology Corp.
1630 McCarthy Blvd.
Milpitas, CA, 95035
USA
Rugged RS485/RS422 Transceivers Operate up to 20MBps or 250kbps for Low EMI
MILPITAS, CA - August 29, 2006 - Linear Technology Corporation introduces the LTC2856/LTC2857/LTC2858 low power RS485/422 transceivers, operating on 5V supplies. The LTC2856-1, LTC2857-1 and LTC2858-1 operate at maximum data rates of 20MBps, while the LTC2856-2, LTC2857-2 and LTC2858-2 feature 250kbps slew rate limited driver outputs to control high frequency emission from equipment and data cables. Enhanced ESD protection on the transceiver interface pins allows the ICs to withstand ±15kV for ESD strikes (Human Body Model) without latchup or damage. The receiver fail-safe feature further enhances the devices' operation by guaranteeing a high output state under conditions of floating or shorted inputs.
The receivers of the LTC2856/LTC2857/LTC2858 hves a one-eighth unit load, supporting up to 256 devices on the bus, while the drivers of all ICs maintain 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.
The rich combination of features makes the LTC2856/LTC2857/LTC2858 an ideal fit across various applications in the consumer, industrial, medical and automotive markets. The ICs are offered in 8-pin and 10-pin MSOP and 3mm x 3mm DFN packages. Specified over the commercial and industrial temperature ranges and available from stock, pricing for the LTC2856/LTC2857/LTC2858 begins at $1.45 each in 1000-piece quantities.
Summary of Features: LTC2856
20MBps or Low EMI 250kbps Maximum Data Rate
No Damage or Latchup to ESD: ±15kV
High Input Impedance Supports 256 Nodes
Guaranteed Failsafe Receiver Operation Over the Entire Common Mode Range
Current Limited Drivers and Thermal Shutdown
Delayed Micropower Shutdown: 5uA Max
Compatible with TIA/EAI-485-A Specification
Available in 8-Lead and 10-Lead 3mm x 3mm DFN and MSOP Packages
20Mbps and Slew Porte Limited 15kV RS485 Transceivers
About Linear Technology
Linear Technology Corporation, a manufacturer of high performance linear integrated circuits, was founded in 1981, became a public company in 1986 and joined the S&P 500 index of major public companies in 2000. Linear Technology products include high performance amplifiers, comparators, voltage references, monolithic filters, linear regulators, DC-DC converters, battery chargers, data converters, communications interface circuits, RF signal conditioning circuits, and many other analog functions. Applications for Linear Technology's high performance circuits include telecommunications, cellular telephones, networking products such as optical switches, notebook and desktop computers, computer peripherals, video/multimedia, industrial instrumentation, security monitoring devices, high-end consumer products such as digital cameras and MP3 players, complex medical devices, automotive electronics, factory automation, process control, and military and space systems. For more information, visit www.linear.com.
LT, LTC and LTM are registered trademarks of Linear Technology Corp.
Contacts
North America and General Information
John Hamburger
Tel: (408) 432-1900 ext. 2419
jhamburger@linear.com
Doug Dickinson
Tel: (408) 432 1900 ext. 2233
ddickinson@linear.com
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