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XR16L2550IM from XR

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XR16L2550IM

Manufacturer: XR, XRT, EXAR

LOW VOLTAGE DUART WITH 16-BYTE FIFO

Partnumber Manufacturer Quantity Availability
XR16L2550IM XR, XRT, EXAR 2468 In Stock

Description and Introduction

LOW VOLTAGE DUART WITH 16-BYTE FIFO The **XR16L2550IM** is a dual universal asynchronous receiver/transmitter (DUART) manufactured by **Exar Corporation (XRT)**. Below are its specifications, descriptions, and features based on factual information:

### **Specifications:**
- **Manufacturer:** Exar Corporation (XRT)  
- **Type:** Dual UART (DUART)  
- **Data Rate:** Up to **3 Mbps**  
- **Operating Voltage:** **3.3V**  
- **Interface:** **SPI (Serial Peripheral Interface) or 8-bit parallel**  
- **FIFO Depth:** **64 bytes per channel** (Tx and Rx)  
- **Package:** **64-pin LQFP (Low-profile Quad Flat Package)**  
- **Operating Temperature Range:** **-40°C to +85°C**  

### **Descriptions:**
- The **XR16L2550IM** is a high-performance **dual-channel UART** designed for embedded systems requiring reliable serial communication.  
- It supports **SPI or parallel bus interfaces** for flexible host processor integration.  
- Includes **64-byte deep FIFOs** for both transmit and receive paths to minimize CPU overhead.  
- Features **auto hardware/software flow control** (RTS/CTS, XON/XOFF).  
- Provides **programmable baud rate generators** for precise clock control.  

### **Features:**
- **Dual full-duplex UART channels**  
- **64-byte Tx/Rx FIFOs per channel**  
- **SPI (up to 25 MHz) or 8-bit parallel host interface**  
- **Automatic hardware (RTS/CTS) and software (XON/XOFF) flow control**  
- **Programmable baud rate with fractional divider**  
- **Infrared (IrDA) encoder/decoder support (1.0 and 1.1 modes)**  
- **Multi-drop mode (9-bit) for RS-485 applications**  
- **Low-power sleep mode**  
- **Industrial temperature range (-40°C to +85°C)**  

This information is strictly based on the manufacturer's datasheet and technical documentation.

Application Scenarios & Design Considerations

LOW VOLTAGE DUART WITH 16-BYTE FIFO

Alternative Part Number

  • ST16C2550CQ48 --: Pin-compatible dual UART with 16-byte FIFOs from the original Exar/MaxLinear family, widely used as a direct substitute for the XR16L2550.
  • TL16C2550PFB --: Dual UART with 16-byte FIFOs offering similar register set and functionality, a common alternative when the XR part is unavailable.
  • SC16C2550BIB48 --: Dual UART with 16-byte FIFOs in a comparable package, functionally equivalent and suitable as a drop-in replacement in most designs.
  • ST16C2550IQ48 --: Dual UART with 16-byte FIFOs in a 48-pin TQFP, functionally equivalent to the XR16L2550 and widely available as a drop-in replacement.

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