MaxLinear | XR68C681CJTR-F

The XR68C681CJTR-F is a EXAR Dual Universal Asynchronous Receiver and Transmitter (DUART) is a data communications device that provides two fully independent full duplex asynchronous communications channels in a single package. The DUART is designed for use in microprocessor based systems and may be used in a polled or interrupt driven environment.

The XR-68C681 device offers a single IC solution for the 68000 family of microprocessors. The DUART is fabricated using advanced two layer metal, with a high performance density EPI/CMOS 1.8 process to provide high performance and low power consumption, and is packaged in a 40 pin DIP or a 44 pin PLCC.

Features:

• Two Full Duplex, Independent Channels
• Asynchronous Receiver and Transmitter
• Quadruple-Buffered Receiver, Dual Buffered Transmitter
• Programmable Stop Bits in 1/16 Bit Increments
• Internal Bit Rate Generators with 23 Different Bit Rates
• Independent Bit Rate Selection for Each Transmitter and Receiver
• External Clock Capability
• Maximum Bit Rate: 1X Clock - 1Mb/s, 16X Clock - 125 Kb/s
• Normal, AUTOECHO, Local LOOPBACK and Remote LOOPBACK Modes
• Multi-function 16 Bit Counter/Timer
• Interrupt Output with Eight Maskable Interrupt Conditions
• Interrupt Vector Output on Acknowledge
• 8 General Purpose Outputs
• 6 General Purpose Inputs with Change of States Detectors on Inputs
• On-chip Oscillator for Crystal
• Standby Mode to Reduce Operating Power
• Compatible with the Motorola MC68681 and the Signetic SCC68692 Devices
• Advanced CMOS Low Power Technology
• Pb-Free, RoHS Compliant Versions Offered

Applications:

• Multimedia Systems
• Serial to Parallel/Parallel to Serial Converter
• DTE for Modem Communication Systems