XR16L570 Datasheet | Exar

DESCRIPTION The XR16L570 (L570) is a 1.62 to 5.5 volt Universal Asynchronous Receiver and Transmitter (UART) with 5 volt tolerant inputs and a reduced pin count. It is software patible to industry standard 16C450, 16C550, ST16C580, ST16C650A, XR16C850 and XR16L580 UARTs. It has 16 bytes of TX and RX FIFOs and is capable of operating with a serial data rate of up to 4 Mbps at 5V, 3 Mbps at 3.3V,1 Mbps at 2.5V and 750 Kbps at 1.8V. The internal registers are patible to the 16C550 register set plus enhanced registers for additional features to support today’s high bandwidth data munication needs. The enhanced features include automatic hardware and software flow control to prevent data loss, selectable RX and TX trigger levels for more efficient interrupt service, wireless infrared (Ir DA) encoder/decoder for wireless applications and a unique Power-Save mode to increase battery operating time. The device es in 32-QFN and 24-QFN packages in industrial temperature range. FEATURES - Smallest Full Featured UART - 1.62V to 5.5V Supply Voltage - 5V Tolerant Inputs (except XTAL1/CLK) - ’0 ns’ Address Hold Time (TAH and TADH) - Software patible to industry standard 16C550, ST16C580, XR16L580 ST16C650A, 16C450, XR16C850 and APPLICATIONS - Handheld Terminals and Tablets - Handheld puters - Wireless Portable Point-of-Sale Terminals - Cellular Phones Data Port - GPS Devices - Personal Digital Assistants Modules - Battery Operated Instruments FIGURE 1. BLOCK DIAGRAM - 16-byte Transmit FIFO - 16-byte Receive FIFO with Errors Flags - Selectable RX and TX FIFO Trigger Levels - Automatic Hardware (RTS/CTS) Flow Control - Automatic Software (Xon/Xoff) Flow Control - Up to 4 Mbps data rate at 5.0V Operation - Up to 3 Mbps data rate at 3.3V Operation - Up to 1 Mbps data rate at 2.5V Operation - Up to 750 Kbps data rate at 1.8V Operation - Infrared (Ir DA) Encoder/Decoder - plete Modem Interface - Power-Save Mode to conserve battery power - Sleep Mode with Wake-up Interrupt - Very...