LOW POWER MULTIPLE RS-232 DRIVERS AND RECEIVERS The **ST75C185B** is a **dual universal asynchronous receiver/transmitter (DUART)** manufactured by **STMicroelectronics (ST)**.
### **Specifications:**
- **Supply Voltage:** 5V ±10%
- **Operating Temperature Range:** 0°C to +70°C (commercial grade)
- **Data Rate:** Up to **1.5 Mbps**
- **Number of Channels:** **2 independent UART channels**
- **FIFO Buffers:** 16-byte transmit and receive FIFOs per channel
- **Interrupt Support:** Programmable interrupt sources
- **Interface:** Parallel (8-bit data bus)
- **Package Options:** 44-pin PLCC, 44-pin PQFP
### **Descriptions:**
The **ST75C185B** is a **high-performance CMOS DUART** designed for **serial communication applications**. It provides **two full-duplex UART channels** with **FIFO buffers** to reduce CPU overhead. It supports **programmable baud rates**, **parity generation/checking**, and **multiple interrupt modes**.
### **Features:**
- **Dual full-duplex UART channels**
- **16-byte transmit and receive FIFOs** per channel
- **Programmable baud rate generator**
- **Modem control signals (CTS, RTS, DSR, DTR, RI, DCD)**
- **Software/hardware flow control**
- **Parity, framing, and overrun error detection**
- **Low power consumption (CMOS technology)**
- **Compatible with industry-standard 16C450/16C550 UARTs**
This device is commonly used in **embedded systems, industrial automation, and communication equipment** requiring reliable serial data transfer.
