XR16L2752 Datasheet | Exar

DESCRIPTION The XR16L27521 (2752) 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 ST16C2552 and XR16C2852. The 2752 register set is patible to the ST16C2552 and the XR16C2852 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. The 2752 is available in the 44-pin PLCC package. NOTE: 1 Covered by U.S. Patent #5,649,122 and #5,949,787 FEATURES - 2.25 to 5.5 Volt Operation - 5 Volt Tolerant Inputs - Pin-to-pin patible to Exar’s ST16C2552 and XR16C2852 - Larger FIFO version of PC16C552 - Two independent UART channels - - - - - - - - - - - - APPLICATIONS Reg set patible to 16C2552 and 16C2852 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 (Ir DA 1.0) Encoder/Decoder Automatic sleep mode Full modem interface - Portable Appliances - Telemunication Network Routers - Ethernet Network Routers - Cellular Data Devices - Factory Automation and Process Controls FIGURE 1. XR16L2752 BLOCK DIAGRAM - Alternate Function Register - Device Identification and...