Description

The XR16C28521 (2852) is a dual universal asynchronous receiver and transmitter (UART). The device operates at 3.3V and 5V and is pin-to-pin compatible to Exar’s ST16C2552 and XR16L2752.

Specifications and features

• Improved version of PC16C552
• Two independent UART channels
• Register set compatible to 16C550
• Up to 3 Mbps at 5V, and 2 Mbps at 3.3V
• Transmit and Receive FIFOs of 128 bytes
• Programmable TX and RX FIFO Trigger Levels
• Transmit and Receive FIFO Level Counters
• Automatic Hardware (RTS/CTS) Flow Control
• Selectable Auto RTS Flow Control Hysteresis
• Automatic Software (Xon/Xoff) Flow Control
• Automatic RS-485 Half-duplex Direction Control Output
• Wireless Infrared (IrDA 1.0) Encoder/Decoder
• Automatic sleep mode
• Full modem interface
• Alternate Function Register
• Device Identification and Revision
• Crystal oscillator or external clock input
• 3.3 V or 5 V operation
• Industrial and commercial temperature ranges
• 44-PLCC package

Application Scenarios

• Portable Appliances
• Telecommunication Network Routers
• Ethernet Network Routers
• Cellular Data Devices
• Factory Automation and Process Controls

Comparison

• Pin-to-pin compatible to Exar’s ST16C2552 and XR16L2752, and register set compatible to 16C550.
• Improved version of PC16C552.
• 3.3V and 5V operation.
• Two independent UART channels and large FIFOs to reduce processor overhead.
• Automatic hardware and software flow control to reduce the number of interrupts.
• Automatic RS-485 Half-duplex Direction Control Output.
• Wireless Infrared (IrDA 1.0) Encoder/Decoder.
• Automatic sleep mode.
• Full modem interface, alternate function register and device identification and revision.
• Industrial and commercial temperature ranges and 44-PLCC package.

None identified.