●The SN65HVS885 is an eight channel, digital-input serializer for high-channel density digital input modules in industrial and building automation. Operating from a 5-V supply the device accepts field input voltages of up to 34 V. 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.
● Eight Digital Sensor Inputs
● High Input Voltage up to 34 V
● Selectable Debounce Filters From 0 ms to
●3 ms
● Flexible Input Current-Limited 0.2 mA to
●5.2 mA
● Field Inputs Protected to 15-kV ESD
● Single 5-V Supply
● Output Drivers for External Status LEDs
● Cascadable for More Inputs in Multiples of Eight
● SPI-Compatible Interface
● Overtemperature Indicator
● APPLICATIONS
● Industrial PCs
● Digital I/O Cards
● High Channel Count Digital Input Modules
● Decentralized I/O Modules
●All other trademarks are the property of their respective owners
