XR16L2752

• 2.25 to 5.5 Volt Operation
• 5 Volt Tolerant Inputs
• Pin-to-pin compatible to Exar's ST16C2552 and XR16C2852
• Larger FIFO version of PC16C552
• Two independent UART channels
Reg set compatible 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 (IrDA 1.0) Encoder/Decoder
Automatic sleep mode
Full modem interface
• Alternate Function Register
• Device Identification and Revision
• Crystal oscillator or external clock input
• Industrial and commercial temperature ranges
• 44-PLCC package

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 compatible to Exar's ST16C2552 and XR16C2852. The XR16L2752 register set is compatible 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 complete 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