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SN65HVS885PWP Datasheet(PDF) 1 Page - Texas Instruments |
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SN65HVS885PWP Datasheet(HTML) 1 Page - Texas Instruments |
1 / 21 page Typical Size 6.4 mm 9.7 mm X 1 FEATURES APPLICATIONS DESCRIPTION SN65HVS885 www.ti.com ............................................................................................................................................................................................... SLAS638 – JANUARY 2009 34 V, Digital-Input Serializer for 5V Systems 2 • Eight Digital Sensor Inputs • SPI-Compatible Interface – High Input Voltage up to 34 V • Over-Temperature Indicator – Selectable Debounce Filters From 0 ms to 3 ms • Industrial PCs – Flexible Input Current-Limited – 0.2 mA to • Digital I/O Cards 5.2 mA • High Channel Count Digital Input Modules – Field Inputs Protected to 15-kV ESD • Decentralized I/O Modules • Single 5V Supply • Output Drivers for External Status LEDs • Cascadable for More Inputs in Multiples of Eight The SN65HVS885 is an eight channel, digital-input serializer for high-channel density digital input modules in industrial and building automation. Operating from a 5V supply the device accepts field input voltages of up to 34V. In combination with galvanic isolators the device completes the interface between the high voltage signals on the field-side and the low-voltage signals on the controller side. Inputs signals are current limited and then validated by internal debounce filters. With the addition of few external components, the input switching characteristic can be configured in accordance with IEC61131-2 for Type 1, 2 and 3 sensor switches. Upon the application of load and clock signals, input data is latched in parallel into the shift register and afterwards clocked out serially. Cascading of multiple devices is possible by connecting the serial output of the leading device with the serial input of the following device, enabling the design of high-channel count input modules. Multiple devices can be cascaded through a single serial port, reducing both the isolation channels and controller inputs required. Input status can be visually indicated via constant current LED outputs. The current limit on the inputs is set by a single, external, precision resistor. An on-chip temperature sensor provides diagnostic information for graceful shutdown and system safety. The SN65HVS885 is available in a 28-pin PWP PowerPAD™ package, allowing for efficient heat dissipation. The device is specified for operation at temperatures from –40°C to 125°C. 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. 2 PowerPAD is a trademark of Texas Instruments. PRODUCTION DATA information is current as of publication date. Copyright © 2009, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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