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參數資料
| 型號： | MT8885 |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | Integrated DTMF Transceiver with Power Down and Adaptive Micro Interface(雙音多頻信號（DTMF）收發器（帶電源關閉和自適應微接口）) |
| 中文描述： | 集成雙音多頻收發器的斷電和自適應微型接口（雙音多頻信號（DTMF）的收發器（帶電源關閉和自適應微接口）） |
| 文件頁數： | 1/25頁 |
| 文件大小： | 190K |
| 代理商： | MT8885 |
4-51
Features
Central office quality DTMF transmitter/receiver
Single 5 Volt power supply
Adaptive micro interface enables compatibility
with Intel and Motorola processors
DTMF transmitter/receiver power-down via
register control or power-down pin
Adjustable guard time
Automatic tone burst mode
Call progress tone detection to -30dBm
Applications
Credit card systems
Paging systems
Repeater systems/mobile radio
Interconnect dialers
Pay phones
Remote monitor/Control systems
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 receiver. The 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
microprocessor to analyze call progress tones.
selected
allowing
a
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
independently be powered down via register control.
and
receiver
may
Ordering Information
MT8885AE
MT8885AN
MT8885AP
-40
°
C to +85
°
C
24 Pin Plastic DIP (300mil)
24 Pin SSOP
28 Pin PLCC
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 2
December 1996
MT8885
Integrated DTMF Transceiver with
Power Down and Adaptive Micro Interface
Preliminary Information
相關PDF資料 |
PDF描述 |
|---|---|
| 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 |
| MT8888C | Integrated DTMFTransceiver with Intel Micro Interface |
| MT8888CC | Integrated DTMFTransceiver with Intel Micro Interface |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MT8885AE | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:Integrated DTMFTransceiver with Power Down & Adaptive Micro Interface |
| MT8885AE1 | 制造商:Microsemi Corporation 功能描述:DTMF TXRX 3.58MHZ CMOS 5V 24PDIP - Rail/Tube 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC TXRX DTMF 20PDIP 制造商:Microsemi Corporation 功能描述:IC TXRX DTMF 20PDIP |
| MT8885AN | 制造商:Microsemi Corporation 功能描述:DTMF TXRX 3.58MHZ CMOS 5V 24SSOP - Rail/Tube |
| MT8885AN1 | 制造商:Microsemi Corporation 功能描述:DTMF TXRX 3.58MHZ CMOS 5V 24SSOP - Rail/Tube |
| MT8885ANR | 制造商:Microsemi Corporation 功能描述: |
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