SN65HVS885 8-input, wide 0- to 34-V digital-input serializer with 5-V VCC for industrial digital inputs | TI.com

SN65HVS885 (ACTIVE) 8-input, wide 0- to 34-V digital-input serializer with 5-V VCC for industrial digital inputs

 

Description

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.

Features

  • 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

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Parametrics

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Part number Order Number of inputs Operating voltage (Min) (V) Operating voltage (Max) (V) I/O voltage (Min) (V) I/O voltage (Max) (V) IO current (mA) Operating temperature range (C) Package Group Package size: mm2:W x L (PKG) Interface Features Diagnostics Logic voltage (Min) (V) Logic voltage (Max) (V)
SN65HVS885 Order now 8     4.5     5.5     -0.5     6     0.2 to 5.2     -40 to 125     HTSSOP | 28     28HTSSOP: 43 mm2: 4.4 x 9.7 (HTSSOP | 28)     SPI     Over Temperature     Overtemperature diagnostics     2     0.8    
SN65HVS880 Samples not available 8     18     34     -0.3     36     0.2 to 5.2     -40 to 85     HTSSOP | 28     28HTSSOP: 43 mm2: 4.4 x 9.7 (HTSSOP | 28)     SPI     Over Temperature
Voltage Monitor    
Overtemperature diagnostics
Voltage monitoring diagnostics    
2     0.8    
SN65HVS881 Order now 8     10     34     -0.3     36     0.2 to 5.2     -40 to 125     HTSSOP | 28     28HTSSOP: 43 mm2: 4.4 x 9.7 (HTSSOP | 28)     SPI     Over Temperature
Parity
Voltage Monitor    
Overtemperature diagnostics
Parity check
Voltage monitoring diagnostics    
2     0.8    
SN65HVS882 Order now 8     10     34     -0.3     36     0.2 to 5.2     -40 to 125     HTSSOP | 28     28HTSSOP: 43 mm2: 4.4 x 9.7 (HTSSOP | 28)     SPI     Over Temperature     Overtemperature diagnostics     2     0.8    
SN65HVS883 Order now 8     10     34     -0.3     36     0.2 to 5.2     -40 to 85     HTSSOP | 28     28HTSSOP: 43 mm2: 4.4 x 9.7 (HTSSOP | 28)     SPI     Voltage Monitor     Voltage monitoring diagnostics     2     0.8