SCC2681AC1A44 双通道异步接收器/发送器(DUART)
Philips Semiconductors SCC2681两路通用异步接收器/发送器(DUART)是一款单芯片MOS-LSI通信器件，在单个封装中提供两条独立的全双工异步接收器/发送器通道。能直接连接微处理器，可用于轮询或中断驱动系统。用CMOS工艺制造。
可对各通道的工作模式和数据格式进行单独编程。另外，每个接收器和发送器可将其工作速度选为十八个固定波特率、源自可编程计数器/定时器的16×时钟或外部1×或16×时钟之一。可从晶体或从外部时钟输入直接操作波特率生成器以及计数器/定时器。接收器和发送器工作速度的独立编程能力使DUART特别适合双速通道应用，如集群终端系统。
每个接收器均经过四重缓冲以使接收器超载的可能性最小化，或降低中断驱动系统的中断开销。另外，提供流量控制能力以在接收器件的缓冲器已满时禁用远程DUART发送器。
SCC2681上还提供多用途7位输入端口和多用途8位输出端口。这些可用作通用I/O端口或在程序控制下分配特定的功能（如时钟输入或状态/中断输出）。
SCC2681提供三种封装版本：40引脚和28引脚DIP（均为0.6"宽）以及44引脚PLCC
产品特点 Features
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功能框图 |
封装
| 型号 | 订购码 (12NC) | 可订购的器件编号 | 产品状态 | 封装 |
| SCC2681AC1A44 | 9352 745 21512 | SCC2681AC1A44,512 | 量产 | PLCC44 (SOT187-2) |
| SCC2681AC1A44 | 9352 745 21518 | SCC2681AC1A44,518 | 量产 | PLCC44 (SOT187-2) |
| SCC2681AC1A44 | 9352 745 21529 | SCC2681AC1A44,529 | 量产 | PLCC44 (SOT187-2) |
订货和供应
| 型号 | 订购码 (12NC) | 可订购的器件编号 | 化学成分 |
| SCC2681AC1A44 | 9352 745 21512 | SCC2681AC1A44,512 | SCC2681AC1A44 |
| SCC2681AC1A44 | 9352 745 21518 | SCC2681AC1A44,518 | SCC2681AC1A44 |
| SCC2681AC1A44 | 9352 745 21529 | SCC2681AC1A44,529 | SCC2681AC1A44 |
SCC2681AC1A44 技术支持
| 档案名称 | 标题 | 类型 | 格式 |
| SCC2681AC1A44 | Dual asynchronous receiver/transmitter (DUART) | Data sheet | |
| AN10307 | UART to Bluetooth interfacing | Application note | |
| AN10353 | Application of UART in GPS navigation system | Application note | |
| AN10251 | Automatic '485' turn-around | Application note | |
| AN10320 | Addressing migrations of SCN devices to more advanced technologies | Application note | |
| AN10339 | UART serial interface through USB evaluation board | Application note | |
| AN10251 | Automatic '485' turn-around | Application note | |
| AN10313 | Reduce CPU overhead with Intelligence Interrupt Arbitration (I2A) feature | Application note | |
| PLCC-WAVE | Footprint for wave soldering | Wave soldering | |
| QFP-SQFP-TQFP-WAVE | Footprint for wave soldering | Wave soldering |
