MX375P

更新时间： 2024-11-02 22:29:43

品牌	Logo	应用领域
CMLMICRO		解码器编码器
页数	文件大小	规格书
16页	226K
描述
Pvt SQUELCHTM CTCSS Encoder/Decoder

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中文翻译

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技术参数
数据手册

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MX375P 技术参数

生命周期：	Obsolete	零件包装代码：	DIP
包装说明：	DIP, DIP28,.6	针数：	28
Reach Compliance Code：	compliant	HTS代码：	8542.39.00.01
风险等级：	5.83	JESD-30 代码：	R-PDIP-T28
长度：	36.82 mm	功能数量：	1
端子数量：	28	最高工作温度：	85 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	DIP	封装等效代码：	DIP28,.6
封装形状：	RECTANGULAR	封装形式：	IN-LINE
电源：	5 V	认证状态：	Not Qualified
座面最大高度：	5.59 mm	子类别：	Other Telecom ICs
最大压摆率：	0.012 mA	标称供电电压：	5 V
表面贴装：	NO	技术：	CMOS
电信集成电路类型：	TELECOM CIRCUIT	温度等级：	INDUSTRIAL
端子形式：	THROUGH-HOLE	端子节距：	2.54 mm
端子位置：	DUAL	宽度：	15.24 mm
Base Number Matches：	1

MX375P 数据手册

DATA BULLETIN

Pvt

SQUELCH CTCSS

MX375

Encoder/Decoder

Features

Applications

• PRIVATE/CLEAR CAPABILITY

• MOBILE RADIOS

• COMMUNITY REPEATERS

• ON-CHIP TX AUDIO PRE/DEEMPHASIS

• ALTERNATIVE TO STANDARD CTCSS

• TELEPHONE/RADIO INTERCONNECT

“PARTY LINE”

SYSTEMS

• POWERSAVE OPTION

Filter

Balanced

Output

Modulator

Input

CLR

TX Audio Output

6dB/Octave

TX Audio

Input

-6dB/Octave

f_EMPH

BIAS

f_EMPH

BIAS

f_CLK1

f_CLK2

f_CARRIER

PVT

RX Audio

Input

RX Audio Output

Reference

Hysteresis

3333Hz

Filters

XTAL

RX Tone Decoder Output

Decode Comparator Input

Clocks

RX Tone Detect Output

RX Tone Input

Load/Latch

CTCSS

Tone Detect

3333 Hz

D5 or Serial Enable 1

D4 or Serial Enable 2

D3 or Serial Data Input

D2 or Serial Clock Input

TX Tone

Output

8-Bit

Shift

and

LD5-LD0

Control

NoTone Output

V_DD

f_CARRIER

Logic

D1 Input

D0 Input

f_CLK1

f_CLK2

Latches

f_EMPH

RX/TX

Control

RX Path

TX Path

Private

V_BIAS

V_SS

Private Enable

Push-To-Listen

PTL

The MX375 is a CMOS LSI microcircuit which combines CTCSS Encode/Decode operation with voice band frequency

inversion. Frequency inversion is achieved by modulating the input audio with a 3333 Hz carrier frequency. Higher voice

band frequencies are translated downward, and lower frequencies upward, resulting in a “mirror image” voice

transmission. PvtSQUELCH combines CTCSS with inverted speech to prevent users from understanding each other’s

communications unless the transmissions are accompanied by the group’s assigned tone. Its net effect is to eliminate

casual eavesdropping and give mobile radio users a certain degree of privacy at a minimal price. Up to 38 PvtSQUELCH

user groups (one per CTCSS tone) can share a single radio channel. With PvtSQUELCH, competing businesses can

share a radio channel without compromising communications security.

Device features: 1) serial or parallel tone programming capability (serial or parallel offered on MX375J, P & LH8), 2) the

ability to operate under NOTONE conditions, 3) on-chip Tx and Rx audio filtering, 4) pin-selectable Private/Clear

operation, and 5) pre/deemphasis filters in the Tx path, for optimal recovered audio quality.

A low-cost 4 MHz crystal/clock and a single 5V supply are required for operation. The MX375 is available in the following

package styles: 28-pin PDIP (MX375P), 28-pin CDIP (MX375J) 28-pin PLCC (MX375LH8), and

24-pin PLCC (MX375LH).

www.mxcom.com Tele: 800 638-5577 910 744-5050 Fax: 910 744-5054

Doc. # 20480026.007

4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA

All trademarks and service marks are held by their respective companies.

12 3 4 5 6 7...16

中文翻译

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