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參數(shù)資料
| 型號： | MT8885AP |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | Integrated DTMFTransceiver with Power Down & Adaptive Micro Interface |
| 中文描述： | 綜合DTMFTransceiver與掉電 |
| 文件頁數(shù)： | 1/20頁 |
| 文件大?。?/td> | 350K |
| 代理商： | MT8885AP |
4-51
Features
External power down pin
Central office quality DTMF transmitter/
receiver
Low power consumption
High speed adaptive micro interface
Adjustable guard time
Automatic tone burst mode
Call progress tone detection to -30dBm
DTMF transmitter/receiver power down via
register control
Applications
Credit card systems
Paging systems
Repeater systems/mobile radio
Interconnect dialers
Personal computers
Description
The MT8885 is a monolithic DTMF transceiver with
call progress filter. It is fabricated in CMOS
technology offering low power consumption and high
reliability.
The receiver section is based upon the industry
standard
MT8870
DTMF
transmitter utilizes a switched capacitor D/A
converter for low distortion, high accuracy DTMF
signalling. Internal counters provide a burst mode
such that tone bursts can be transmitted with precise
timing. A call progress filter can be selected allowing
a microprocessor to analyze call progress tones.
receiver
while
the
The MT8885 utilizes an adaptive micro interface,
which allows the device to be connected to a number
of popular microcontrollers with minimal external
logic. The MT8885 provides enhanced power down
features. The transmitter and receiver may
independently be powered down via register
control. A full chip power down pin provides simple
power and control capability.
Figure 1 - Functional Block Diagram
TONE
IN+
IN-
GS
OSC1
OSC2
V
DD
V
Ref
V
SS
ESt
St/GT
D0
D1
D2
D3
IRQ/CP
DS/RD
CS
R/W/WR
RS0
∑
D/A
Converters
Row and
Column
Counters
Transmit Data
Register
Data
Bus
Buffer
Tone Burst
Gating Cct.
+
-
Oscillator
Circuit
Bias
Circuit
Control
Logic
Digital
Algorithm
and Code
Converter
Control
Logic
Steering
Logic
Status
Register
Control
Register
A
Control
Register
B
Receive Data
Register
Interrupt
Logic
I/O
Control
Low Group
Filter
High Group
Filter
Dial
Tone
Filter
PWDN
ISSUE 1
May 1995
MT8885
Integrated DTMFTransceiver
with Power Down & Adaptive
Micro Interface
Advance Information
Ordering Information
MT8885AE
MT8885AN
MT8885AP
-40°C to +85°C
24 Pin Plastic DIP
24 Pin SSOP
28 Pin PLCC
相關PDF資料 |
PDF描述 |
|---|---|
| MT8885 | Integrated DTMFTransceiver with Power Down & Adaptive Micro Interface |
| MT8885 | Integrated DTMF Transceiver with Power Down and Adaptive Micro Interface(雙音多頻信號（DTMF）收發(fā)器（帶電源關閉和自適應微接口）) |
| MT8888CE-1 | Integrated DTMFTransceiver with Intel Micro Interface |
| MT8888CN-1 | CB 3C 3#16S SKT RECP WALL |
| MT8888CS-1 | Integrated DTMFTransceiver with Intel Micro Interface |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MT8888 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:Integrated DTMFTransceiver with Intel Micro Interface |
| MT8888C | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Integrated DTMF Transceiver with Intel Micro Interface |
| MT8888CC | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:Integrated DTMFTransceiver with Intel Micro Interface |
| MT8888CC-1 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:Integrated DTMFTransceiver with Intel Micro Interface |
| MT8888CE | 制造商:Microsemi Corporation 功能描述: |
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