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SN65HVD1795 Datasheet(PDF) 1 Page - Texas Instruments |
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SN65HVD1795 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 18 page V FAULT up to 70 V INVInputCanCorrect forCrossedWires SN65HVD1794, SN65HVD1795 SN65HVD1796 www.ti.com SLLS935A – AUGUST 2008 – REVISED AUGUST 2012 70-V Fault-Protected RS-485 Transceiver With Cable Invert Check for Samples: SN65HVD1794, SN65HVD1795, SN65HVD1796 1 FEATURES • Bus-Pin Fault Protection to > ±70 V • Failsafe Receiver for Open-Circuit, Short- Circuit and Idle-Bus Conditions • Cable Invert Function Allows Correction for Reversed Bus Pins • Low Power Consumption • Common-Mode Voltage Range (–20 V to 25 V) – ICC 5 mA Quiescent During Operation More Than Doubles TIA/EIA 485 Requirement • Power-Up, Power-Down Glitch-Free Operation • Bus I/O Protection APPLICATIONS – ±16 kV JEDEC HBM Protection • Designed for RS-485 and RS-422 Networks • Reduced Unit Load for Up to 256 Nodes DESCRIPTION These 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. They are also robust to ESD events, with high levels of protection to human-body model specifications. These devices combine a differential driver and a differential receiver, which operate from a single power supply. The driver differential outputs and the receiver differential inputs are connected internally to for a bus port suitable for half-duplex (two-wire bus) communication. A cable invert pin (INV) allows active correction of mis- wires that may occur during installation. Upon detecting communication errors, the user can apply a logic HIGH to the INV pin, effectively inverting the polarity of the differential bus port, thereby correcting for the reversed bus wires. These devices feature a wide common-mode voltage range, making them suitable for multi-point applications over long cable runs. These devices are characterized from –40°C to 105°C. Table 1. PRODUCT SELECTION GUIDE PART NUMBER DUPLEX SIGNALING RATE NODES CABLE LENGTH SN65HVD1794 Half 115 kbps Up to 256 1500 m SN65HVD1795 PREVIEW Half 1 Mbps Up to 256 150 m SN65HVD1796 PREVIEW Half 10 Mbps Up to 64 50 m For similar features with 3.3 V supply operation, see the SN65HVD1781 (SLLS877). 1 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. UNLESS OTHERWISE NOTED this document contains Copyright © 2008–2012, Texas Instruments Incorporated PRODUCTION DATA information 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. |
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