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參數資料
| 型號： | MM74HC942 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 調制器/解調器 |
| 英文描述： | MM74HC942 is a full duplex low speed modem |
| 中文描述： | 0.3 kbps DATA, MODEM, PDIP20 |
| 文件頁數： | 6/8頁 |
| 文件大小： | 146K |
| 代理商： | MM74HC942 |
Applications Information
(Continued)
DESIGN PRECAUTIONS
Power supplies to digital systems may contain high ampli-
tude spikes and other noise. To optimize performance of the
MM74HC942 operating in close proximity to digital systems,
supply and ground noise should be minimized. This involves
attention to power supply design and circuit board layout.
Power supply decoupling close to the device is recommend-
ed. Ground loops should be avoided. For further discussion
of these subjects see the Audio/Radio Handbook published
by National Semiconductor Corporation.
Interface Circuits for MM74HC942 300 Baud Modem
TL/F/5348–4
C
CDT
and R
TLA
should be chosen to suit the application. See the Applications Information for more details.
Complete Acoustically Coupled 300 Baud Modem
TL/F/5348–5
Note:
The efficiency of the acoustic coupling will set the valves of R1 and R2.
6
相關PDF資料 |
PDF描述 |
|---|---|
| MM74HC942J | MM74HC942 is a full duplex low speed modem |
| MM74HC942N | MM74HC942 is a full duplex low speed modem |
| MM74HC943 | Low-Voltage Adjustable Precision Shunt Regulator 3-TO-92 -40 to 85 |
| MM74HC943J | Low-Voltage Adjustable Precision Shunt Regulator 3-TO-92 -40 to 85 |
| MM74HC943N | Low-Voltage Adjustable Precision Shunt Regulator 3-SOT-89 -40 to 85 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MM74HC942J | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:MM74HC942 is a full duplex low speed modem |
| MM74HC942N | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:MM74HC942 is a full duplex low speed modem |
| MM74HC943 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:300 Baud Modem |
| MM74HC943J | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:300 Baud Modem |
| MM74HC943N | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:300 Baud Modem |
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