66 MHZ PCI BUS DUAL UART WITH POWER MANAGEMENT SUPPORT The **XR17V252IM** is a dual UART (Universal Asynchronous Receiver/Transmitter) manufactured by **Exar Corporation** (now part of **MaxLinear**). Below are its key specifications, descriptions, and features:
### **Specifications:**
- **Interface:** UART (Dual Channel)
- **Data Rate:** Up to **3 Mbps** per channel
- **Voltage Supply:** **3.3V** (with 5V-tolerant I/O)
- **Operating Temperature Range:** **-40°C to +85°C**
- **Package:** **48-pin LQFP (Low-profile Quad Flat Package)**
- **FIFO Buffers:** **128-byte** transmit and receive FIFOs per channel
- **Flow Control:** Supports **hardware (RTS/CTS)** and **software (XON/XOFF)** flow control
- **Interrupt Support:** Programmable interrupt modes
- **Additional Features:**
- Auto RTS/CTS and RS485 half-duplex control
- Infrared (IrDA) encoder/decoder support (1.63 Mbps)
- Sleep mode for power savings
- Multi-drop mode (9-bit) support
### **Descriptions:**
The **XR17V252IM** is a high-performance dual UART designed for applications requiring reliable serial communication. It integrates two independent UART channels with deep FIFOs, reducing CPU overhead. It is suitable for industrial, embedded, and communication systems.
### **Features:**
- **Dual independent UART channels**
- **128-byte FIFOs** (reduces CPU load)
- **3 Mbps baud rate** per channel
- **5V-tolerant I/O** (3.3V operation)
- **Hardware and software flow control**
- **Infrared (IrDA) support**
- **RS485 and 9-bit multiprocessor mode**
- **Low-power sleep mode**
For detailed electrical characteristics and register descriptions, refer to the official **Exar datasheet**.
