SN65HVD21M-EP Datasheet, PDF (1/21 Pages) Texas Instruments – EXTENDED COMMON-MODE RS-485 TRANSCEIVERS

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SN65HVD21ĆEP
SGLS321 − DECEMBER 2005
EXTENDED COMMONĆMODE RSĆ485 TRANSCEIVERS
FEATURES
D Controlled Baseline
− One Assembly/Test Site, One Fabrication
Site
D Extended Temperature Performance of −55°C
to 125°C
D Enhanced Diminishing Manufacturing
Sources (DMS) Support
D Enhanced Product-Change Notification
D Qualification Pedigree^†
D Common-Mode Voltage Range (−20 V to 25 V)
More Than Doubles TIA/EIA-485 Requirement
D Receiver Equalization Extends Cable Length,
Signaling Rate (HVD23, HVD24)
D Reduced Unit-Load for up to 256 Nodes
D Bus I/O Protection to Over 16-kV HBM
D Failsafe Receiver for Open-Circuit,
Short-Circuit and Idle-Bus Conditions
D Low Standby Supply Current 1.5-µA Max
D More Than 100 mV Receiver Hysteresis
† _{Component qualification in accordance with JEDEC and industry}
standards to ensure reliable operation over an extended temperature
range. This includes, but is not limited to, Highly Accelerated Stress
Test (HAST) or biased 85/85, temperature cycle, autoclave or
unbiased HAST, electromigration, bond intermetallic life, and mold
compound life. Such qualification testing should not be viewed as
justifying use of this component beyond specified performance and
environmental limits.
APPLICATIONS
D Long Cable Solutions
− Factory Automation
− Security Networks
− Building HVAC
D Severe Electrical Environments
− Electrical Power Inverters
− Industrial Drives
− Avionics
DESCRIPTION
The SN65HVD21M offers performance exceeding typical RS−485 devices. In addition to meeting all
requirements of the TIA/EIA−485−A standard, the HVD2x family operates over an extended range of
common-mode voltage, and has features such as high ESD protection, wide receiver hysteresis, and failsafe
operation. This family of devices is ideally suited for long-cable networks, and other applications where the
environment is too harsh for ordinary transceivers.
The SN65HVD21M is designed for bidirectional data transmission on multipoint twisted-pair cables. Example
applications are digital motor controllers, remote sensors and terminals, industrial process control, security
stations, and environmental control systems.
The SN65HVD21M combines a 3-state differential driver and a differential receiver, which operates from a
single 5-V power supply. The driver differential outputs and the receiver differential inputs are connected
internally to form a differential bus port that offers minimum loading to the bus. This port features an extended
common-mode voltage range making the device suitable for multipoint applications over long cable runs.
The SN65HVD21M allows up to 256 connected nodes at moderate data rates (up to 5 Mbps). The driver output slew
rate is controlled to provide reliable switching with shaped transitions which reduce high-frequency noise emissions.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments
semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
Copyright  2005, Texas Instruments Incorporated