Overview
The SN65HVS880 is a 24-V, eight-channel digital-input serializer designed by Texas Instruments for high-channel density digital input modules in industrial automation and process control systems. This device interfaces between 24-V sensor outputs on the field side and low-voltage controller inputs on the control side, ensuring galvanic isolation when used with appropriate isolators. It supports input signals from EN60947-5-2 compliant 2- and 3-wire proximity switches and adheres to IEC61131-2 standards for Type 1, 2, and 3 sensor switches.
The SN65HVS880 features a SPI-compatible interface, regulated 5-V output for external digital isolators, and adjustable current limits. It also includes over-temperature and low-supply voltage indicators, making it a robust solution for industrial automation applications.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Field Power Input (V24) | -0.3 | - | 35 | V |
| Field Digital Inputs (VIPx) | -0.3 | - | 35 | V |
| Logic Input Voltage (VID) | -0.5 | - | 6 | V |
| Output Current (IO) | - | - | ±8 | mA |
| Human-Body Model ESD | - | - | ±15 | kV |
| Junction Temperature (TJ) | - | - | 170 | °C |
| Operating Temperature (TA) | -40 | - | 85 | °C |
| Input Data Rate (fIP) | 0 | - | 1 | Mbps |
| Clock Pulse Frequency (fCLK) | - | - | 100 | MHz |
Key Features
- Eight sensor inputs with high input voltage up to 30 V
- SPI-compatible interface for easy integration with microcontrollers
- Regulated 5-V output for external digital isolators
- Selectable debounce filters from 0 ms to 3 ms to eliminate contact bounce
- Over-temperature and low-supply voltage indicators for robust operation
- Adjustable current limits from 0.2 mA to 5.2 mA
- Field inputs and supply lines protected up to 15-kV HBM
- Output drivers for external status LEDs
- Cascadable for more inputs in multiples of eight
Applications
- Sensor inputs for industrial automation and process control
- High channel count digital input modules for PC and PLC systems
- Decentralized I/O modules
- IEC61131-2 Type 1, 2, or 3 switches
- EN60947-5-2 proximity switches
Q & A
- What is the primary function of the SN65HVS880?
The SN65HVS880 is a 24-V, eight-channel digital-input serializer designed to interface between 24-V sensor outputs and low-voltage controller inputs in industrial automation systems.
- What is the input voltage range for the SN65HVS880?
The device can handle input voltages up to 30 V.
- What type of interface does the SN65HVS880 use?
The SN65HVS880 uses a SPI-compatible interface.
- What is the purpose of the regulated 5-V output?
The regulated 5-V output is designed to supply external digital isolators.
- How does the debounce filter work?
The debounce filter can be set to different debounce times (0 ms to 3 ms) to eliminate unintended signal transitions due to contact bounce or other mechanical effects.
- What are the over-temperature and low-supply voltage indicators for?
These indicators monitor the device temperature and supply voltage, providing a fault signal if the device becomes too hot or if the supply voltage drops below a certain threshold.
- Can the SN65HVS880 be cascaded for more inputs?
Yes, the SN65HVS880 can be cascaded to increase the number of input channels in multiples of eight.
- What is the operating temperature range of the SN65HVS880?
The device operates within a temperature range of -40°C to 85°C.
- How is the current limit adjusted in the SN65HVS880?
The current limit can be adjusted by changing the value of the current limiting resistor (RLIM).
- What kind of protection does the SN65HVS880 offer for field inputs and supply lines?
The device protects field inputs and supply lines up to 15-kV HBM (Human-Body Model) ESD.
