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XR88C681 Datasheet(PDF) 1 Page - Exar Corporation |
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XR88C681 Datasheet(HTML) 1 Page - Exar Corporation |
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1 / 101 page  XR88C681 CMOS Dual Channel UART (DUART) Rev. 2.11 E 2006 June 2006 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) 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 Operating Power D Compatible with the Motorola MC2681 and Signetics SCC2692 devices D Advanced CMOS Low Power Technology APPLICATIONS D Multimedia Systems D Serial to Parallel/Parallel to Serial Converter D DTE for Modem Communication Systems GENERAL DESCRIPTION The EXAR Dual Universal Asynchronous Receiver and Transmitter (DUART) is a data communications device that provides two fully independent full duplex asynchronous communication 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 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. ORDERING INFORMATION Part No. Pin Package Operating Temperature Range XR88C681CJ 44 PLCC 0°C to 70°C XR88C681CN/40 40 CDIP 0°C to 70°C XR88C681CP/28 28 PDIP 0°C to 70°C XR88C681CP/40 40 PDIP 0°C to 70°C XR88C681J 44 PLCC -40°C to +85°C XR88C681N/40 40 CDIP -40°C to +85°C XR88C681P/28 28 PDIP -40°C to +85°C XR88C681P/40 40 PDIP -40°C to +85°C |
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