The SN65HVS883 is a 24-V, eight-channel, digital-input serializer for high-channel
density digital input modules of PC and PLC-based systems in industrial automation. In combination
with galvanic isolators, the device completes the interface between the 24-V sensor outputs of the
field-side and the low-voltage controller inputs at the control-side. Input signals provided by
EN60947-5-2 compliant 2-wire and 3-wire proximity switches are current-limited and then validated by internal debounce
filters. The input switching characteristic is in accordance with IEC61131-2 for Type 1, 2, and 3
Upon the application of load and clock signals, input data is latched in parallel into
the shift register and afterwards clocked out serially via a subsequent isolator into a serial PLC
Cascading of multiple SN65HVS883 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. Input status is indicated via 3-mA constant current LED outputs. An external
precision resistor is required to set the internal reference current. The integrated voltage
regulator provides a 5-V output to supply low-power isolators. An internal supply voltage monitor
provides a chip-okay (CHOK) indication.
The SN65HVS883 comes in a 28-pin PWP PowerPAD™ package allowing for efficient heat dissipation. The
device is specified for operation at temperatures from –40°C to 85°C.