Exar Corporation XR88C681
The XR88C681 device offers a single IC solution for the 8080/85, 8086/88, Z80, Z8000, 68xx and 65xx microprocessor families. 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 PDIP, a 28 pin PDIP, and a 44 pin PLCC. Block Diagram of the XR88C681 Rev.
| Part No. |
XR88C681 |
| Datasheet |
XR88C681
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| Manufacturer |
 Exar Corporation |
| Description |
CMOS DUAL CHANNEL UART |
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FEATURES
D Two Full Duplex, Independent Channels D Asynchronous Receiver and Transmitter D Quadruple-Buffered Receivers and Dual Buffered Transmitters D Programmable Stop Bits in 1/16 Bit Increments D Internal Bit Rate Generators with More than 23 Bit Rates D Independent Bit Rate Selection for Each Transmitter and Receiver D External Clock Capability D Maximum Bit Rate: 1X Clock - 1Mb/s, 16X Clock - 125kb/s D Normal, AUTOECHO, Local LOOPBACK and Remote LOOPBACK Modes D Multi-function 16 Bit Counter/Timer D Interrupt Output with Eight Maskable Interrupt Conditions D Interrupt Vector Output on Acknowledge (40 Pin DIP and 44 Pin PLCC Packages Only) June 2006 D Programmable Interrupt Daisy Chain D 8 General Purpose Outputs (40 Pin DIP and 44 Pin PLCC Packages Only) D 7 General Purpose Inputs with Change of States Detectors on Inputs (40 Pin DIP and 44 Pin PLCC Packages Only) D Multi-Drop Mode Compatible with 8051 Nine Bit Mode D On-Chip Oscillator for Crystal D Standby Mode to Reduce Opera...
