Description

The XR88C681JF is an electronic component model in the product category of UARTs (Universal Asynchronous Receiver Transmitter). It is an EXAR Dual Universal Asynchronous Receiver and Transmitter (DUART) that provides two fully independent full duplex asynchronous communication channels in a single package. This device is designed for use in microprocessor-based systems and can be used in a polled or interrupt-driven environment. It offers a single IC solution for various microprocessor families including 8080/85, 8086/88, Z80, Z8000, 68xx, and 65xx.

Specifications and features

• Two Full Duplex, Independent Channels
• Asynchronous Receiver and Transmitter
• Quadruple-Buffered Receivers and Dual Buffered Transmitters
• Programmable Stop Bits in 1/16 Bit Increments
• Internal Bit Rate Generators with More than 23 Bit Rates
• Independent Bit Rate Selection for Each Transmitter and Receiver
• External Clock Capability
• Maximum Bit Rate: 1X Clock - 1Mb/s, 16X Clock - 125kb/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 (40 Pin DIP and 44 Pin PLCC Packages Only)
• Programmable Interrupt Daisy Chain
• 8 General Purpose Outputs (40 Pin DIP and 44 Pin PLCC Packages Only)
• 7 General Purpose Inputs with Change of States Detectors on Inputs (40 Pin DIP and 44 Pin PLCC Packages Only)
• Multi-Drop Mode Compatible with 8051 Nine Bit Mode
• On-Chip Oscillator for Crystal
• Standby Mode to Reduce Operating Power
• Compatible with the Motorola MC2681 and Signetics SCC2692 devices
• Advanced CMOS Low Power Technology

Application Scenarios

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

Comparison

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