The SN65HVS882 is an eight channel, digital-input serializer for high-channel density digital input modules in
industrial automation. 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. Input signals are current-limited
and then validated by internal debounce filters.
With the addition of a few external components, the input switching characteristics 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 integrated voltage regulator provides a 5-V output to supply low-power
isolators. An on-chip temperature sensor provides diagnostic information for graceful shutdown and system
The SN65HVS882 is available in a 28-pin PWP PowerPAD™ package, allowing for efficient heat dissipation.
The device is characterized for operation at temperatures from -40°C to 125°C.
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