Overview
The SN65HVS885PWPR, manufactured by Texas Instruments, is a 34-V digital-input serializer designed for high-channel density digital input modules in industrial and building automation systems. This device operates from a single 5-V supply and accepts field input voltages up to 34 V, making it suitable for interfacing between high-voltage field signals and low-voltage controller signals. It features an SPI-compatible interface, allowing easy integration with standard microcontrollers. The device includes several key features such as current-limited inputs, internal debounce filters, and an on-chip temperature sensor for overtemperature indication and system safety.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| VCC (Device Power Input) | -0.5 | 6 | V | |
| VIPx (Field Digital Inputs) | -0.3 | 36 | V | |
| VID (Logic Input Voltage) | -0.5 | 6 | V | |
| IO (Output Current) | -8 | 8 | mA | |
| TJ (Junction Temperature) | -40 | 125 | °C | |
| Tstg (Storage Temperature) | 150 | °C | ||
| fCLK (Clock Pulse Frequency) | 100 | MHz | ||
| Package | HTSSOP (28 pins) |
Key Features
- Cascadable Design: Devices can be cascaded through a single serial port, reducing the number of isolation channels and controller inputs required.
- Current-Limited Inputs: Inputs are current-limited and validated by internal debounce filters.
- SPI-Compatible Interface: Compatible with standard microcontrollers for easy integration.
- Overtemperature Indicator: An on-chip temperature sensor monitors device temperature and signals a fault condition if the temperature exceeds 150°C.
- Visual Status Indication: Output drivers for external status LEDs to visually indicate input status.
- Galvanic Isolation Compatibility: Can be used in combination with galvanic isolators to complete the interface between high-voltage field signals and low-voltage controller signals.
Applications
- Industrial PCs: Suitable for high-channel density digital input modules.
- Digital I/O Cards: Ideal for applications requiring multiple digital inputs.
- High Channel Count Digital Input Modules: Used in industrial and building automation systems.
- Decentralized I/O Modules: Effective in distributed control systems.
Q & A
- What is the operating voltage range of the SN65HVS885PWPR? The device operates from a single 5-V supply.
- What is the maximum field input voltage the SN65HVS885PWPR can handle? The device can handle field input voltages up to 34 V.
- Is the SN65HVS885PWPR compatible with standard microcontrollers? Yes, it has an SPI-compatible interface.
- How does the SN65HVS885PWPR handle overtemperature conditions? The device includes an on-chip temperature sensor that signals a fault condition if the temperature exceeds 150°C.
- Can the SN65HVS885PWPR be cascaded with other devices? Yes, devices can be cascaded through a single serial port.
- What is the purpose of the RLIM pin on the SN65HVS885PWPR? The RLIM pin is used to set the current limit on the inputs using an external precision resistor.
- How does the SN65HVS885PWPR protect against ESD? The device meets JEDEC standards for ESD protection.
- What is the package type and pin count of the SN65HVS885PWPR? The device is available in a 28-pin HTSSOP package.
- What are the typical applications of the SN65HVS885PWPR? It is used in industrial PCs, digital I/O cards, high channel count digital input modules, and decentralized I/O modules.
- How does the device indicate input status visually? The device has output drivers for external status LEDs to visually indicate input status.
