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參數資料
| 型號： | MT88L70 |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | 3 Volt Integrated DTMF Receiver(3V 集成雙音多頻信號（DTMF）接收器) |
| 中文描述： | 3伏集成雙音多頻接收器（3V的集成雙音多頻信號（DTMF）的接收器） |
| 文件頁數： | 1/15頁 |
| 文件大小： | 101K |
| 代理商： | MT88L70 |
4-23
MT88L70
3 Volt Integrated DTMF Receiver
Features
2.7 - 3.6 volt operation
Complete DTMF receiver
Low power consumption
Internal gain setting amplifier
Adjustable guard time
Central office quality
Power-down mode
Inhibit mode
Functionally compatible with Mitel’s MT8870D
Applications
Paging systems
Repeater systems/mobile radio
Credit card systems
Remote control
Personal computers
Telephone answering machine
Description
The MT88L70 is a complete 3 Volt, DTMF receiver
integrating both the bandsplit filter and digital
decoder functions. The filter section uses switched
capacitor techniques for high and low group
filters; the decoder uses
techniques to detect and decode all 16 DTMF tone-
pairs into a 4-bit code. External component count is
minimized by on chip provision of a differential input
amplifier, clock oscillator and latched three-state bus
interface.
digital counting
Ordering Information
MT88L70AE
MT88L70AS
MT88L70AN
-40
°
C to + 85
°
C
18 Pin Plastic DIP
18 Pin SOIC
20 Pin SSOP
Figure 1 - Functional Block Diagram
PWDN
IN +
IN -
GS
OSC1
OSC2
St/GT
ESt
STD
TOE
Q1
Q2
Q3
Q4
VDD
VSS
VRef
INH
Bias
Circuit
Dial
Tone
Filter
High Group
Filter
Low Group
Filter
Digital
Detection
Algorithm
Code
Converter
and Latch
St
GT
Steering
Logic
Chip
Power
Chip
Bias
VRef
Buffer
Zero Crossing
Detectors
to all
Chip
Clocks
ISSUE 4
March 1997
ISO
2
-CMOS
相關PDF資料 |
PDF描述 |
|---|---|
| MT88L85 | 3V Integrated DTMF Transceiver with Power-Down and Adaptive Micro Interface(3V 集成雙音多頻信號（DTMF）接收器（帶電源關閉和自適應微接口）) |
| MT88L89 | 3V Integrated DTMF Transceiver with Adaptive Micro Interface(3V 集成雙音多頻信號（DTMF）接收器（帶自適應微接口）) |
| MT88V32 | 8 x 4 High Performance Video Switch Array(8 x 4 高性能數字可編程正交開關（用于控制寬帶視頻信號）) |
| MT8910-1 | CMOS ST-BUS⑩ FAMILY Digital Subscriber Line Interface Circuit |
| MT8910-1AC | CMOS ST-BUS⑩ FAMILY Digital Subscriber Line Interface Circuit |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MT88L70AC | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:3 Volt Integrated DTMF Receiver |
| MT88L70AE | 制造商:Microsemi Corporation 功能描述: |
| MT88L70AE1 | 制造商:Microsemi Corporation 功能描述:DTMF RX 3.58MHZ CMOS 3V 18PDIP - Rail/Tube |
| MT88L70AN | 制造商:Microsemi Corporation 功能描述: |
| MT88L70AN1 | 制造商:Microsemi Corporation 功能描述:DTMF RX 3.58MHZ CMOS 3V 20SSOP - Rail/Tube 制造商:Microsemi Corporation 功能描述:IC 3V INTEGRATED DTMF RCVR |
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