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SN65HVD1780, SN65HVD1781, SN65HVD1782
SLLS877H – DECEMBER 2007 – REVISED MARCH 2017
SN65HVD178x Fault-Protected RS-485 Transceivers With 3.3-V to 5-V Operation
1 Features
•1 Bus-Pin Fault Protection to: – > ±70 V (SN65HVD1780, SN65HVD1781) – > ±30 V (SN65HVD1782)
• Operation With 3.3-V to 5-V Supply Range • ±16-kV HBM Protection on Bus Pins • Reduced Unit Load for Up to 320 Nodes • Failsafe Receiver for Open-Circuit, Short-Circuit,
and Idle-Bus Conditions • Low Power Consumption
– Low Standby Supply Current, 1 µA Maximum – ICC 4-mA Quiescent Current During Operation • Pin-Compatible With Industry-Standard SN75176 • Signaling Rates of 115 kbps, 1 Mbps, and up to 10 Mbps • Create a Custom Design using the SN65HVD178x with the WEBENCH® Power Designer
2 Applications
• HVAC Networks • Security Electronics • Building Automation • Telecommunication Equipment • Motion Control • Industrial Networks
3 Description
The SN65HVD178x devices are designed to survive overvoltage faults such as direct shorts to power supplies, mis-wiring faults, connector failures, cable crushes, and tool mis-applications. The devices are also robust to ESD events with high levels of protection to the human-body-model specification.
The SN65HVD178x devices combine a differential driver and a differential receiver, which operate from a single power supply. In the SN65HVD1782, the driver differential outputs and the receiver differential inputs are connected internally to form a bus port suitable for half-duplex (two-wire bus) communication. This port features a wide commonmode voltage range, making the devices suitable for multipoint applications over long cable runs. These devices are characterized from –40°C to 125°C. These devices are pin-compatible with the industrystandard SN75176 transceiver, making them drop-in upgrades in most systems.
These devices are fully compliant with ANSI TIA/EIA 485-A with a 5-V supply and can operate with a 3.3-V supply with reduced driver output voltage for lowpower applications. For applications where operation is required over an extended common-mode voltage range, see the SN65HVD1785 (SLLS872) data sheet.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
SN65HVD178x
SOIC (8) PDIP (8)
4.90 mm × 3.91 mm 9.81 mm × 6.35 mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.
Protection Against Bus Shorts
VFAULT up to 70 V
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA.
SN65HVD1780, SN65HVD1781, SN65HVD1782
SLLS877H – DECEMBER 2007 – REVISED MARCH 2017
www.ti.com
Table of Contents
1 Features .................................................................. 1 2 Applications ........................................................... 1 3 Description ............................................................. 1 4 Revision History..................................................... 2 5 Device Comparison Table..................................... 4 6 Pin Configuration and Functions ......................... 4 7 Specifications......................................................... 4
7.1 Absolute Maximum Ratings ..................................... 4 7.2 ESD Ratings: JEDEC................................................ 5 7.3 ESD Ratings: IEC ..................................................... 5 7.4 Recommended Operating Conditions....................... 5 7.5 Thermal Information .................................................. 5 7.6 Electrical Characteristics........................................... 6 7.7 Power Dissipation Characteristics ............................ 7 7.8 Switching Characteristics .......................................... 7 7.9 Typical Characteristics .............................................. 9 8 Parameter Measurement Information ................ 10 8.1 Equivalent Input Schematic .................................... 14 9 Detailed Description ............................................ 15 9.1 Overview ................................................................. 15
9.2 Functional Block Diagram ....................................... 15 9.3 Feature Description................................................. 15 9.4 Device Functional Modes........................................ 16 10 Application and Implementation........................ 18 10.1 Application Information.......................................... 18 10.2 Typical Application ............................................... 18 11 Power Supply Recommendations ..................... 22 12 Layout................................................................... 22 12.1 Layout Guidelines ................................................. 22 12.2 Layout Exampl.