音影先锋亚洲天堂网|电影世界尽头的爱完整版播放|国产 熟女 91|高清无码免费观看欧美日韩|韩国一区二区三区黄色录像|美女亚洲加勒比在线|亚洲综合网 开心五月|7x成人在线入口|成人网站免费日韩毛片区|国产黄片?一级?二级?三级

MM74HC942 Datasheet

  • MM74HC942

  • National Semiconductor [MM74HC942 is a full duplex low spee...

  • NSC

掃碼查看芯片數(shù)據(jù)手冊

上傳產(chǎn)品規(guī)格書

PDF預(yù)覽

MM74HC942 300 Baud Modem
January 1988
MM74HC942 300 Baud Modem
General Description
The MM74HC942 is a full duplex low speed modem It pro-
vides a 300 baud bidirectional serial interface for data com-
munication over telephone lines and other narrow band-
width channels It is Bell 103 compatible
The MM74HC942 utilizes advanced silicon-gate CMOS
technology Switched capacitor techniques are used to per-
form analog signal processing
MODULATOR SECTION
The modulator contains a frequency synthesizer and a sine
wave synthesizer It produces a phase coherent frequency
shift keyed (FSK) output
LINE DRIVER AND HYBRID SECTION
The line driver and hybrid are designed to facilitate connec-
tion to a 600X phone line They can perform two-to-four-
wire conversion and drive the line at a maximum of 0 dBm
DEMODULATOR SECTION
The demodulator incorporates anti-aliasing filters a receive
filter limiter discriminator and carrier detect circuit The
nine pole receive filter provides 60 dB of transmitted tone
rejection The discriminator is fully balanced for stable
operation
Features
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Drives 600X at 0 dBm
All filters on chip
Transmit level adjustment compatible with universal
service order code
TTL and CMOS compatible logic
All inputs protected against static damage
g
5V supplies
Low power consumption
Full duplex answer or originate operation
Analog loopback for self test
Power down mode
Applications
Y
Y
Y
Y
Y
Y
Y
Y
Built-in low speed modems
Remote data collection
Radio telemetry
Credit verification
Stand-alone modems
Point-of-sale terminals
Tone signalling systems
Remote process control
TRI-STATE is a registered trademark of National Semiconductor Corp
Connection and Block Diagrams
Dual-In-Line Package
TL F 5348鈥?
Top View
Order Number MM54HC942 or
MM74HC942
TL F 5348 鈥?2
C
1995 National Semiconductor Corporation
TL F 5348
RRD-B30M105 Printed in U S A

MM74HC942相關(guān)型號PDF文件下載

您可能感興趣的PDF文件資料

熱門IC型號推薦

掃碼下載APP，
一鍵連接廣大的電子世界。

在線人工客服

買家服務(wù)：
賣家服務(wù)：
技術(shù)客服：

0571-85317607

網(wǎng)站技術(shù)支持

13606545031

客服在線時間周一至周五
9:00-17:30

關(guān)注官方微信號，
第一時間獲取資訊。

建議反饋
返回頂部

建議反饋

聯(lián)系人：

聯(lián)系方式：

按住滑塊，拖拽到最右邊
>>
感謝您向阿庫提出的寶貴意見，您的參與是維庫提升服務(wù)的動力！意見一經(jīng)采納，將有感恩紅包奉上哦！