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XR88C681_06

Description
Dual UART CMOS with Two Fully Independent Full Duplex Asynchronous Communications Channels
Categorysemiconductor    Analog mixed-signal IC   
File Size2MB,101 Pages
ManufacturerExar [Exar Corporation]
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XR88C681_06 Overview

Dual UART CMOS with Two Fully Independent Full Duplex Asynchronous Communications Channels

CMOS Dual Channel
UART (DUART)
June 2006
XR88C681
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)
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.
ORDERING INFORMATION
Part No.
XR88C681CJ
XR88C681CN/40
XR88C681CP/28
XR88C681CP/40
XR88C681J
XR88C681N/40
XR88C681P/28
XR88C681P/40
Rev. 2.11
E2006
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
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.
Pin Package
44 PLCC
40 CDIP
28 PDIP
40 PDIP
44 PLCC
40 CDIP
28 PDIP
40 PDIP
Operating
Temperature Range
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C

XR88C681_06 Related Products

XR88C681_06 XR88C681 XR88C681CJ XR88C681CN/40 XR88C681P/40 XR88C681N/40 XR88C681P/28 XR88C681J XR88C681CP/40 XR88C681CP/28
Description Dual UART CMOS with Two Fully Independent Full Duplex Asynchronous Communications Channels Dual UART CMOS with Two Fully Independent Full Duplex Asynchronous Communications Channels Dual UART CMOS with Two Fully Independent Full Duplex Asynchronous Communications Channels Dual UART CMOS with Two Fully Independent Full Duplex Asynchronous Communications Channels Dual UART CMOS with Two Fully Independent Full Duplex Asynchronous Communications Channels Dual UART CMOS with Two Fully Independent Full Duplex Asynchronous Communications Channels Dual UART CMOS with Two Fully Independent Full Duplex Asynchronous Communications Channels Dual UART CMOS with Two Fully Independent Full Duplex Asynchronous Communications Channels Dual UART CMOS with Two Fully Independent Full Duplex Asynchronous Communications Channels Dual UART CMOS with Two Fully Independent Full Duplex Asynchronous Communications Channels
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