XR68C681 Dual UART with Two Fully Independent Full Duplex Asynchronous Communications Channels
The XR68C681 is a Dual Universal Asynchronous Receiver and Transmitter with 16 (XR68C681) bytes transmit and receive FIFO. The XR68C681 is a pin and functional compatible for the XR68C681 and Philips SCC68681 UART with additional features. The operating speed of the receiver and transmitter can be selected independently from a table of twenty four fixed baud rates, a 16X clock derived from a programmable counter/timer, or an external 1X or 16X clock. The baud rate generator and counter/timer can operate directly from a crystal or from external clock input. The XR68C681 provides a power down mode in which the oscillator is stopped but the register contents are retained. The XR68C681 is fabricated in an advanced CMOS process to achieve low power and high speed requirements.
技术特性
- Two Full Duplex, Independent Channels
- Asynchronous Receiver and Transmitter
- Quadruple-Buffered Receiver, Dual Buffered Transmitter
- Programmable Stop Bits in 1/16 Bit Increments
- Internal Bit Rate Generators with 23 Different Bit Rates
- Independent Bit Rate Selection for Each Transmitter and Receiver
- External Clock Capability
- Maximum Bit Rate: 1X Clock - 1Mb/s, 16X Clock - 125Kb/s
- Normal, AUTOECHO, Local LOOPBACK and Remote LOOPBACK Modes
- Multi-function 16 Bit Counter/Timer
- Interrupt Output with Eight Maskable Interrupt Conditions
- Interrupt Vector Output on Acknowledge
- 8 General Purpose Outputs
- 6 General Purpose Inputs with Change of States Detectors on Inputs
- On-chip Oscillator for Crystal
- Standby Mode to Reduce Operating Power
- Compatible with the Motorola MC68681 and the Signetic SCC68692 Devices
- Advanced CMOS Low Power Technology
- Pb-Free, RoHS Compliant Versions Offered
|
技术指标
| 中央处理器接口 |
Motorola |
| 频道 |
2 |
| 数据传输速率@5/3.3/2.5V |
1/na/na |
| Max Data Rate @ 5/3.3/2.5/1.8V (Mbps) |
1/na/na/na |
| 发送器/接收器FIFO(Bytes) |
1/3 |
| 发送器/接收器FIFOCtrs |
No |
| 发送器/接收器FIFOINT Trig |
No/No |
| 自动RTS/CTS |
Yes |
| IrDa供应 |
No |
| 5VTol输入 |
No |
| 电压供应 |
5 |
| 封装 |
CDIP-40, PDIP-40, PLCC-44 |
应用领域 APPLICATION
- Multimedia Systems
- Serial to Parallel/Parallel to Serial Converter
- DTE for Modem Communication Systems
订购信息 Ordering Information
| 器件型号 |
有害物质限制 |
最低温度 |
最高温度 |
状态 |
立刻购买 |
申请样片 |
| XR68C681CJ-F |
|
0 |
70 |
Active |
|
|
| XR68C681CJTR-F |
|
0 |
70 |
Active |
|
|
| XR68C681CP-F |
|
0 |
70 |
Active |
|
|
| XR68C681J-F |
|
-40 |
85 |
Active |
|
|
| XR68C681JTR-F |
|
-40 |
85 |
Active |
|
|
| XR68C681P-F |
|
-40 |
85 |
Active |
|
