XR16L2750 Datasheet | Exar

DESCRIPTION The XR16L27501 (2750) is a low voltage dual universal asynchronous receiver and transmitter (UART) with 5 Volt tolerant inputs. The device operates from 2.25 to 5.5 Volt supply range and is pin-to-pin patible to Exar’s ST16C2550 and XR16C2850 except the 48-TQFP package. The 2750 register set is patible to the ST16C2550 and the XR16C2850 enhanced features . It supports the Exar’s enhanced features of 64 bytes of TX and RX FIFOs, programmable FIFO trigger level and FIFO level counters, automatic hardware (RTS/CTS) and software flow control, automatic RS-485 half duplex direction control output and a plete modem interface. Onboard registers provide the user with operational status and data error flags. An internal loopback capability allows system diagnostics. Independent programmable baud rate generators are provided in each channel to select data rates up to 6.25 Mbps at 5 Volt and 8X sampling clock. The 2750 is available in 48-pin TQFP and 44-pin PLCC packages. NOTE: 1 Covered by U.S. Patent #5,649,122 and #5,832,205 FEATURES - 2.25 to 5.5 Volt Operation - 5 Volt Tolerant Inputs - Pin-to-pin patible to Exar’s ST16C2550 and TI’s TL16C752B on the 48-TQFP package - Pin alike XR16C2850 48-TQFP package but without CLK8/16, CLKSEL and HDCNTL inputs - Two independent UART channels s s s s s s s s s s s s APPLICATIONS - Portable Appliances - Telemunication Network Routers - Ethernet Network Routers - Cellular Data Devices - Factory Automation and Process Controls FIGURE 1. XR16L2750 BLOCK DIAGRAM Reg set patible to 16C2550 and 16C2850 Up to 6.25 Mbps at 5 Volt, 4 Mbps at 3.3 Volt, and 3 Mbps at 2.5 Volt with 8X sampling rate Transmit and Receive FIFOs of 64 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 via RTS# Wireless Infrared...