Datasheet > MT3270

MT3270

更新时间： 2024-02-25 05:01:03

品牌	Logo	应用领域
MITEL		/
页数	文件大小	规格书
8页	94K
描述
Wide Dynamic Range DTMF Receiver

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技术参数
数据手册

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MT3270 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
包装说明：	PLASTIC, MS-001BA, DIP-8	Reach Compliance Code：	unknown
HTS代码：	8542.39.00.01	风险等级：	5.87
JESD-30 代码：	R-PDIP-T8	JESD-609代码：	e0
长度：	9.59 mm	功能数量：	1
端子数量：	8	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：	DIP8,.3
封装形状：	RECTANGULAR	封装形式：	IN-LINE
峰值回流温度（摄氏度）：	225	电源：	5 V
认证状态：	Not Qualified	座面最大高度：	5.33 mm
子类别：	Telecom Signaling Circuits	最大压摆率：	0.008 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：	DTMF SIGNALING CIRCUIT
温度等级：	INDUSTRIAL	端子面层：	Tin/Lead (Sn/Pb)
端子形式：	THROUGH-HOLE	端子节距：	2.54 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	30
宽度：	7.62 mm

MT3270 数据手册

MT3170B/71B, MT3270B/71B, MT3370B/71B

Wide Dynamic Range DTMF Receiver

ISSUE 2

May 1995

Features

•

Wide dynamic range (50dB) DTMF Receiver

Ordering Information

•

Call progress (CP) detection via cadence

indication

MT3170/71BE

8 Pin Plastic DIP

18 Pin SOIC

MT3270/71BE

MT3370/71BS

MT3370/71BN

•

4-bit synchronous serial data output

20 Pin SSOP

Software controlled guard time for MT3x70B

Internal guard time circuitry for MT3x71B

Powerdown option (MT317xB & MT337xB)

-40 °C to +85 °C

signalling. The MT3x70B provides an early steering

(ESt) logic output to indicate the detection of a DTMF

signal and requires external software guard time to

validate the DTMF digit. The MT3x71B, with preset

internal guard times, uses a delay steering (DStD)

logic output to indicate the detection of a valid DTMF

digit. The 4-bit DTMF binary digit can be clocked out

synchronously at the serial data (SD) output. The

SD pin is multiplexed with call progress detector

output. In the presence of supervisory tones, the

call progress detector circuit indicates the cadence

(i.e., envelope) of the tone burst. The cadence

information can then be processed by an external

microcontroller to identify specific call progress

signals. The MT327xB and MT337xB can be used

with a crystal or a ceramic resonator without

additional components. A power-down option is

provided for the MT317xB and MT337xB.

4.194304MHz crystal or ceramic resonator

(MT337xB and MT327xB)

•

External clock input (MT317xB)

Guarantees non-detection of spurious tones

Applications

•

Integrated telephone answering machine

End-to-end signalling

Fax Machines

Description

The MT3x7xB is a family of high performance DTMF

receivers which decode all 16 tone pairs into a 4-bit

binary code. These devices incorporate an AGC for

wide dynamic range and are suitable for end-to-end

➀

PWDN

Steering

Digital

Circuit

ESt

DStD

VDD

Guard

Voltage

Bias Circuit

➂

Time

High

Group

Filter

VSS

Parallel to

Serial

Converter

& Latch

ACK

Dial

Tone

Filter

Code

Converter

and

Anti-

alias

Filter

Digital

INPUT

AGC

Detector

Algorithm

Latch

Low

Group

Filter

Mux

➁

Oscillator

OSC2

and

Clock

Circuit

Energy

Detection

OSC1

(CLK)

To All Chip Clocks

➀ MT3170B/71B and MT337xB only.

➁ MT3270B/71B and MT337xB only.

➂ MT3x71B only.

Figure 1 - Functional Block Diagram

4-3

12 3 4 5 6 7 8

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与MT3270相关器件

型号	品牌	描述	获取价格	数据表
MT3270/71BE	ZARLINK	DTMF Signaling Circuit, PDIP8, PLASTIC, 8 PIN	获取价格
MT3270B	ZARLINK	Wide Dynamic Range DTMF Receiver	获取价格
MT3270BE	ZARLINK	Wide Dynamic Range DTMF Receiver	获取价格
MT3270BE	MICROSEMI	DTMF Signaling Circuit, CMOS, PDIP8,	获取价格
MT3270BE1	ZARLINK	Wide Dynamic Range DTMF Receiver	获取价格
MT3270BE1	MICROSEMI	DTMF Signaling Circuit, PDIP8, LEAD FREE, PLASTIC, MS-001BA, DIP-8	获取价格

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