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XR17D158IV from EXAR

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XR17D158IV

Manufacturer: EXAR, XR

UNIVERSAL (3.3V AND 5V) PCI BUS OCTAL UART

Partnumber Manufacturer Quantity Availability
XR17D158IV EXAR, XR 1218 In Stock

Description and Introduction

UNIVERSAL (3.3V AND 5V) PCI BUS OCTAL UART The part **XR17D158IV** is manufactured by **EXAR** (now part of **MaxLinear**).  

### **Specifications:**  
- **Type:** Dual UART (Universal Asynchronous Receiver/Transmitter)  
- **Interface:** PCI Express (PCIe)  
- **Number of Channels:** 2 (Dual UART)  
- **Data Rate:** Up to **6 Mbps** per channel  
- **Voltage Supply:** **3.3V**  
- **Operating Temperature Range:** **-40°C to +85°C**  
- **Package:** **48-pin TQFP**  

### **Descriptions & Features:**  
- **High-Speed Serial Communication:** Supports baud rates up to 6 Mbps per UART channel.  
- **PCIe Interface:** Provides a direct connection to PCI Express for easy system integration.  
- **FIFO Buffers:** Each UART channel includes **128-byte transmit and receive FIFOs** to reduce CPU overhead.  
- **Hardware & Software Flow Control:** Supports RTS/CTS, XON/XOFF, and automatic flow control.  
- **Programmable Features:** Includes selectable baud rates, data formats (5-8 bits, parity, stop bits), and interrupt modes.  
- **Low Power Consumption:** Designed for energy-efficient operation.  
- **Industrial Temperature Support:** Suitable for harsh environments.  

This part is commonly used in **industrial automation, embedded systems, and communication applications** requiring reliable high-speed serial communication over PCIe.  

Would you like additional details on pin configurations or application notes?

Application Scenarios & Design Considerations

UNIVERSAL (3.3V AND 5V) PCI BUS OCTAL UART

Alternative Part Number

  • ST16C554DIQ64 --: Quad UART with 16-byte FIFOs in a 64-pin LQFP, functionally similar to the XR17D158 and from the same vendor family lineage (Exar/MaxLinear).
  • TL16C554AIPN --: Widely available quad UART with 16-byte FIFOs in a 64-pin LQFP package, a common drop-in style alternative for multi-channel serial expansion.
  • SC16C554BIB64 --: Quad UART with 16-byte FIFOs in 64-pin LQFP, offering comparable channel count and interface for serial port expansion designs.
  • ST16C654CQ64 --: Quad UART with 64-byte FIFOs in a 64-pin QFP, functionally similar to the XR17D158 octal/quad UART family and pin-compatible in many designs.
  • TL16C754BPN --: Quad UART with 64-byte FIFOs in a 80-pin LQFP, widely used as a drop-in alternative for high-channel-count UART applications.
  • SC16C654BIB64 --: Quad UART with 64-byte FIFOs and similar register set, suitable replacement when the XR17D158 is unavailable.

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