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XR17C158IV from EXAR

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XR17C158IV

Manufacturer: EXAR, XR, XRT

5V PCI BUS OCTAL UART

Partnumber Manufacturer Quantity Availability
XR17C158IV EXAR, XR, XRT 228 In Stock

Description and Introduction

5V PCI BUS OCTAL UART The XR17C158IV is a quad universal asynchronous receiver/transmitter (QUART) manufactured by EXAR (now part of MaxLinear). Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Interface:** UART (Universal Asynchronous Receiver/Transmitter)  
- **Number of Channels:** 4 (Quad UART)  
- **Data Rate:** Up to 3 Mbps per channel  
- **FIFO Buffers:** 128-byte transmit and receive FIFOs per channel  
- **Voltage Supply:** 3.3V or 5V operation  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 100-pin LQFP (Low-Profile Quad Flat Package)  
- **Bus Interface:** Parallel (8-bit)  

### **Descriptions:**
The XR17C158IV is a high-performance quad UART designed for applications requiring multiple serial communication channels. It supports independent operation of four full-duplex UART channels with enhanced FIFO buffers to reduce CPU overhead. It is commonly used in industrial automation, networking, and embedded systems.

### **Features:**
- **Four Independent UART Channels:** Each with full-duplex operation.  
- **Large FIFOs:** 128-byte transmit and receive FIFOs per channel to minimize CPU interrupts.  
- **High-Speed Operation:** Supports baud rates up to 3 Mbps per channel.  
- **Programmable Features:** Includes software-selectable baud rates, data formats (5-8 bits, parity, stop bits), and flow control (RTS/CTS, XON/XOFF).  
- **Low Power Consumption:** Suitable for power-sensitive applications.  
- **Industrial Temperature Range:** Operates reliably in harsh environments (-40°C to +85°C).  
- **Legacy Compatibility:** Supports 16C450, 16C550, and 16C552 register compatibility.  

This information is based on the manufacturer's datasheet and technical documentation. For exact details, refer to the official EXAR (MaxLinear) datasheet.

Application Scenarios & Design Considerations

5V PCI BUS OCTAL UART

Alternative Part Number

  • ST16C654IQ64 --: Quad UART from the same Exar/MaxLinear family with similar 16C654 register set and 64-pin package, often used as a functional replacement for multi-channel UART designs.
  • TL16C754BPN --: Quad UART with 64-byte FIFOs and 16C550-compatible register set, a common cross-vendor alternative for multi-channel serial expansion applications.
  • SC16C654BIB64 --: Quad UART with 16C654-compatible register map and 64-byte FIFOs, suitable as a pin/function-similar alternative from a different vendor.

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