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MAH28151CXXXX PDF预览

MAH28151CXXXX

更新时间： 2024-09-24 14:53:03
品牌 Logo 应用领域
DYNEX 通信时钟数据传输外围集成电路
页数 文件大小 规格书
22页 220K
描述
Serial I/O Controller, 1 Channel(s), 0.0078125MBps, CMOS, CDIP28, CERAMIC, DIP-28

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MAH28151CXXXX 技术参数

生命周期：Obsolete零件包装代码：DIP
包装说明：DIP,针数：28
Reach Compliance Code：unknownHTS代码：8542.31.00.01
风险等级：5.84Is Samacsys：N
边界扫描：NO总线兼容性：MAS281
最大时钟频率：20 MHz通信协议：ASYNC, BIT; SYNC, BYTE
最大数据传输速率：0.0078125 MBps外部数据总线宽度：8
JESD-30 代码：R-CDIP-T28低功率模式：YES
串行 I/O 数：1端子数量：28
最高工作温度：125 °C最低工作温度：-55 °C
封装主体材料：CERAMIC, METAL-SEALED COFIRED封装代码：DIP
封装形状：RECTANGULAR封装形式：IN-LINE
认证状态：Not Qualified座面最大高度：5.715 mm
最大供电电压：5.5 V最小供电电压：4.5 V
标称供电电压：5 V表面贴装：NO
技术：CMOS温度等级：MILITARY
端子形式：THROUGH-HOLE端子节距：2.54 mm
端子位置：DUAL总剂量：1M Rad(Si) V
宽度：15.24 mmuPs/uCs/外围集成电路类型：SERIAL IO/COMMUNICATION CONTROLLER, SERIAL
Base Number Matches：1

MAH28151CXXXX 数据手册

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MA28151
Radiation hard Programmable  
Communication Interface  
ReplacesJanuary 2000 version, DS3574-5.0  
DS3574-5.1 July 2002  
The MA28151 is based on the industry standard 8251A  
Universal Synchronous Asynchronous Receiver/Transmitter  
(USART), modified for data communications with the MAS281  
microprocessor.  
The MA28151 is used as a peripheral device and is  
programmed by the CPU to operate using virtually any serial  
data transmission technique presently in use (including IBM  
“bi-sync”). The USART accepts data characters from the CPU  
in parallel format and then converts them into a continuous  
serial data stream for transmission.  
Simultaneously, it can receive serial data streams and  
convert them into parallel data characters for the CPU. The  
USART signals the CPU whenever it receives a character for  
transmission or whenever it receives a character for the CPU.  
The CPU can read the complete status of the USART at any  
time, including data transmission errors and control signals  
such as SYNDET and TxEMPTY.  
FEATURES  
■ Radiation Hard to 1MRad(Si)  
■ Latch Up Free, High SEU Immunity  
■ Silicon-on-Sapphire Technology  
■ Synchronous 5 - 8 Bit Characters; Internal or External  
Figure 1: MA28151 Block Diagram  
Character Synchronisation; Automatic Sync Insertion  
■ Asynchronous 5 - 8 Bit Characters; Clock Rate - 1, 16 or  
64 Times Baud Rate; Break Character Generation, 1 1⁄  
2 Stop Bits  
2
or  
■ All Inputs and Outputs are TTL Compatible  
■ Compatible with the MAS281 (MIL-STD-1750A)  
Microprocessor  
The MA28151 is based on the industry standard 8251A  
USART, modified for use with the MAS281 processor,  
incorporating the following features:  
prevents the transmitter from turning off in the middle of a  
word.  
6. When external Sync Detect is programmed, Internal Sync  
Detect is disabled and an External Sync Detect status is  
provided via a flip-flop, which clears itself upon a status read.  
7. The possibility of a false sync detect is minimized in two  
ways: by ensuring that if double character sync is  
programmed, the characters will be continuously detected and  
by clearing the Rx register to all 1’s whenever Enter-Hunt  
command is issued in Sync mode.  
8. When the MA28151 is not selected, the RDWN and DSN  
lines do not affect the internal operation of the device.  
9. The MA28151 Status can be read at any time but the status  
update will be inhibited during status read.  
1. MA28151 has double-buffered data paths with separate l/O  
registers for control status, data in and data out, which  
considerably simplifies control programming and minimizes  
CPU overhead.  
2. In synchronous operations, the Receiver detects and  
handles “break” automatically, relieving the CPU of this task.  
3. A refined Rx initialisation prevents the Receiver from  
starting when in the “break” state, preventing unwanted  
interrupts from the disconnected USART.  
4. At the conclusion of a transmission, the TxD line will always  
return to the marking state unless SBRK is programmed.  
5. Tx Enable logic enhancement prevents a Tx Disable  
command from prematurely halting transmission of the  
previously written data before completion. The logic also  
10. The MA28151 is free from extraneous glitches, providing  
higher speed and better operating margins.  
11. Synchronous Baud rate is from DC to 64K.  
12. Asynchronous Baud rate is from DC to 19.2K.  
1/22  
1234567...22

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