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XR16C854CQ from EXAR

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XR16C854CQ

Manufacturer: EXAR, XR

QUAD UART WITH RX/TX FIFO COUNTERS,128-BYTE FIFO

Partnumber Manufacturer Quantity Availability
XR16C854CQ EXAR, XR 677 In Stock

Description and Introduction

QUAD UART WITH RX/TX FIFO COUNTERS,128-BYTE FIFO The XR16C854CQ is a quad universal asynchronous receiver/transmitter (UART) manufactured by Exar Corporation (now part of MaxLinear). Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Manufacturer:** Exar Corporation (now MaxLinear)  
- **Part Number:** XR16C854CQ  
- **Type:** Quad UART  
- **Data Rate:** Up to 3 Mbps  
- **Operating Voltage:** 3.3V or 5V  
- **FIFO Depth:** 128 bytes (per channel)  
- **Number of Channels:** 4  
- **Interface:** Parallel (8-bit)  
- **Package:** 64-pin LQFP  

### **Descriptions:**
- The XR16C854CQ is a high-performance quad UART designed for serial communication applications.  
- It supports four independent full-duplex UART channels with 128-byte FIFOs for both transmit and receive operations.  
- The device is compatible with industry-standard UARTs and offers enhanced features for improved performance.  

### **Features:**
- **128-byte FIFOs:** Reduces CPU overhead by minimizing interrupts.  
- **Programmable Baud Rate:** Supports data rates up to 3 Mbps.  
- **Auto Hardware/Software Flow Control:** Includes RTS/CTS and XON/XOFF support.  
- **Multi-drop Mode (9-bit):** Enables address detection in multidrop applications.  
- **Infrared (IrDA) Encoder/Decoder:** Supports IrDA 1.0 (up to 115.2 kbps).  
- **Sleep Mode:** Low-power mode for energy efficiency.  
- **Industrial Temperature Range:** Operates in extended temperature conditions.  
- **Software-Compatible:** Backward-compatible with 16C450, 16C550, and 16C552 UARTs.  

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

Application Scenarios & Design Considerations

QUAD UART WITH RX/TX FIFO COUNTERS,128-BYTE FIFO

Alternative Part Number

  • ST16C554DCQ64 --: MaxLinear (formerly Exar) quad UART in the same 64-pin QFP family, functionally similar to the XR16C854 with compatible register set and pinout.
  • TL16C554AIPN --: TI quad UART with 16-byte FIFOs, widely available and commonly used as a drop-in functional replacement for Exar quad UARTs in 64-pin packages.
  • SC16C554BIB64 --: NXP quad UART with 16-byte FIFOs and similar feature set, suitable as a cross-vendor alternative when the Exar part is unavailable.

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