communications device that provides four fully independent full-duplex asynchronous communication channels in a_ single package. The QUART is designed for use in microprocessor based systems and may be used in a polled or interrupt-driven environment. The XR-82C684 device offers a single IC solution for various microprocessor families. The 88 and 68 modes (for the 8800 and 68000 family of processors, respectively) can be selected by tying the SEL pin to Vpp or Vs. The QUART is fabricated using advanced two layer metal, with a high performance density EP/CMOS 1.8 process to provide high performance and low power consumption, and is packaged in a 44 pin PLCC and a 68 pin PLCC. ORDERING INFORMATION Operating Part No. Package Temperature Range XR-82C684CJ/44 44 pin PLOG OS to 70C XR-82C684CJ 68 pin PLCC OC to 70C XR-82C684J/44 44 pin PLOG -40C to 86C XR-82C684J 68 pin PLCG -40C to 88C 1997 {XR-82C684 4 EXAR PRINCIPLES OF OPERATION Figur
XR-82C684 Preliminary Information CMOS Quad Channel UART (QUART) GENERAL DESCRIPTION The EXAR Quad Universal Asynchronous Receiver and Transmitter (QUART) is a data communications device that provides four fully independent full duplex asynchronous communications channels in a single package. The QUART is designed for use in micro- processor based systems and may be used in a palled or interrupt driven environment. The XR-82C684 offers a single IC solution for vari- ous microprocessor families. The 88 and 68 modes can be selected by tying SEL pin to VDD or VSS. The QUART is fabricated using advanced two layer metal, with a high density EPI/CMOS 1.8, process to provide high performance and low power consumption. ABSOLUTE MAXIMUM RATINGS DC Supply Voltage 7V Storage Temperature -65C 10150C All Voltages with -0.5 V to +7V respect to ground ORDERING INFORMATION Part number Package Operating Temperature XR-B2C684CJ/44 PLCC44 PIN 0C to 70C XR-82C684J/44 PLOC44 PIN -40C to 85C
XR-82C684 CMOS Quad Channel UART (QUART) PRELIMINARY GENERAL DESCRIPTION The EXAR Quad Universal Asynchronous Receiver and Transmitter (QUART) is a data communications device that provides four fully independent full duplex asynchronous communications channels in a single package. The QUART is designed for use in microprocessor based systems and may be used in a polled or interrupt driven environment. The XR-82C684 offers a single IC solution for various microprocessor families. The 88 and 68 modes can be selected by tying SEL pin to VDD or VSS. External Clock Capability Normal, Autoecho, Local Loop Back and Remote Loopback Modes Two Multifunction 16-Bit Counter/ TImer Interrupt Output with Sixteen Maskable Interrupt Conditions Prioritized Interrupt Vector Output on Acknowledge Programmable Interrupt Daisy Chain 16 General Purpose Outputs 16 General Purpose Inputs with Eight Change of State Detectors on Inputs Multidrop Mode Compatible with 8051 Nine-Bit Mode On Chip Oscillator for C
XR-82C684 An Z& EXARCompany Printed November 29, 1995 QUAD UNIVERSAL ASYNCHRONOUS RECEIVER AND TRANSMITTER DESCRIPTION | 68 Pin PLCC Package The XR-82C684 is a Quad Universal Asynchronous . dee... EE Receiver and Transmitter with 3 bytes of receive Senet S ba P PES ER EEE FIFO. The XR-82C684 is software compatible with eel) fel fel) fl (| ff] [2] [2] [2] (2 | XR-68C681/88C681 and Signetics SCC2681 Dual ors Caaf O [22] 2s UART. on e SF _ The XR-82C682 provides independent receive and po [7S a7] eon transmit operating speeds that can be selected as one pi [a] [66] ws of the eighteen fixed baud rates, a 16 X clock derived SF cron from a programmable counter/timer, or an external 1X pe [iF Haz) trots or 16X clock. The baud rate generator and counter/ ps [a] XR-82C684 [2] 0 timer can operate directly from a crystal or from * a SF external clock input. The XR-82C684 provides a nwwwen [7] Ha] 3 power-down mode in which the oscillator is stopped cen (22
XR-82C684 CMOS Quad Channel UART (QUART) PRELIMINARY GENERAL DESCRIPTION The EXAR Quad Universal ASynchronous Receiver and Transmitter (QUART) is a data communications device that provides four fully independent full duplex asynchronous communications channels in a single package. The QUART is designed for use in microprocessor based systems and may be used in a polled or interrupt driven environment. The XR-82C684 offers a single IC solution for various microprocessor families. The 88 and 68 modes can be selected by tying SEL pin to VDD or VSS. The QUART is fabricated using advanced two layer metal, with a high density EPI/CMOS process to provide high performance and low power consumption. FEATURES Four Full Duplex, Independent Channels, Asynchronous Receiver and Transmitter Quadruple Receive and Transmit Buffer Programmable Stop Bits in 1/16 Bit Increments Pin Selectable 88 and 68 mode Four Independent Internal Bit Rate Generator with more than 33 Bit Rates Independent Bit Rate Sel
systems and may be used in a polled or interrupt-driven environment. Datasheets Datasheet Version 2.0.1 September 1999 2.19 MB Schematics ISA Eval Board Schematic Version 1.2.0 August 2007 94.54 KB Obsolescence Interface Brochure IBIS Models BSDL ICI The XR-82C684 device offers a single IC solution for various microprocessor families. The "88" and "68 modes" (for the 8800 and 68000 family of processors, respectively) can be selected by tying the SEL pin to VDD or VSS. The QUART 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 44 pin PLCC and a 68 pin PLCC. UART Finder For UART technical support or to obtain an IBIS model for this product, http://www.exar.com/Common/Content/ProductDetails.aspx?ID=56&ParentID=1 (1 of 2) [31-Jul-09 1:55:05 PM] XR82C684 -Quad UART with Four Fully Independent Full-Duplex Asynchronous Communication Channels please email Exar's UART Technical S
communications device that provides four fully independent full-duplex asynchronous communication channels in a single package. The QUART is designed for use in microprocessor based systems and may be used in a polled or interrupt-driven environment. The XR-82C684 device offers a single IC solution for various microprocessor families. The "88" and "68 modes" (for the 8800 and 68000 family of processors, respectively) can be selected by tying the SEL pin to VDD or VSS. The QUART 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 44 pin PLCC and a 68 pin PLCC.
Loopback Multifunction 16 Bit Counter/ Timer Eight Maskable Interrupt Conditions Interrupt Vector Output on Acknowledge Programmable Interrupt Daisy Chain 15 I/O Pins Depending on Package Multidrop Mode (8051 Nine Bit Mode) Stand By Mode for Reduced Power XR-82C684 Quad Quadruple Receive and Transmit Buffer | CMOS | +5V+5% | 44 Pin PLCC Asynchronous Programmable Stop Bits in 1/16 68 Pin PLCC Receiver and Increments Pin Selectable 88 or Transmitter 68 Mode Four Bit Rate Generators (33 Baud Rates) External Clock Capability Normal, Autoecho, Local and Remote Loopbacks Two Multifunction 16 Bit Counter/Timer Interrupt Output with 16 Interrupt Condition Interrupt Vector Output on Acknowledge .- Programmable Interrupt Daisy Chain 16 I/O Pins Depending on Package Multidrop Mode Depending on Package Stand By Mode For Reduced Power Debounced Reset Input (20ns) Operates with 3.68 or 7.38MHz Crystals 3-4
communications device that provides four fully independent full-duplex asynchronous communication channels in a single package. The QUART is designed for use in microprocessor based systems and may be used in a polled or interrupt-driven environment. The XR-82C684 device offers a single IC solution for various microprocessor families. The "88" and "68 modes" (for the 8800 and 68000 family of processors, respectively) can be selected by tying the SEL pin to (VDD)or (VSS). The QUART 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 44 pin PLCC and a 68 pin PLCC.