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參數(shù)資料
| 型號： | M-8870-02T |
| 廠商： | CLARE INC |
| 元件分類： | 信令電路 |
| 英文描述： | DTMF Receiver |
| 中文描述： | TELECOM, DTMF SIGNALING CIRCUIT, PDSO18 |
| 封裝： | PLASTIC, SOIC-18 |
| 文件頁數(shù)： | 5/9頁 |
| 文件大?。?/td> | 301K |
| 代理商： | M-8870-02T |
Tone Decoding
FLOW
697
697
697
770
770
770
852
852
852
941
941
941
697
770
852
941
ANY
FHIGH
1209
1336
1477
1209
1336
1477
1209
1336
1477
1336
1209
1477
1633
1633
1633
1633
ANY
Key (ref.)
1
2
3
4
5
6
7
8
9
0
S
#
A
B
C
D
ANY
OE
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
Q4
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
Z
Q3
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
Z
Q2
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
Z
Q1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
Z
L = logic low, H = logic high, Z = high impedance
M-8870
www.clare.com
5
Rev. 3
Differential Input Configuration
Common Crystal Connection
stops the oscillator and the functioning of the filters.
On the M-8870-01 models, this pin is tied to ground
(logic low).
Inhibit mode is enabled by a logic high input to pin 5
(INH). It inhibits the detection of 1633 Hz. The output
code will remain the same as the previous detected
code (see Pin functions table on page 4). On the M-
8870-01 models, this pin is tied to ground (logic low).
Input Configuration
The input arrangement of the M-8870 provides a dif-
ferential input operational amplifier as well as a bias
source (V
) to bias the inputs at mid-rail. Provision
is made for connection of a feedback resistor to the
op-amp output (GS) for gain adjustment.
In a single-ended configuration, the input pins are
connected as shown in the Single - Ended Input
Configuration on page 3 with the op-amp connected
for unity gain and V
REF
biasing the input at 1/2V
DD
.
The Differential Input Configuration bellow permits
gain adjustment with the feedback resistor R
5
.
DTMF Clock Circuit
The internal clock circuit is completed with the addition
of a standard 3.579545 MHz television color burst crys-
tal. The crystal can be connected to a single M-8870 as
shown in the Single - Ended Input Configuration on
page 3, or to a series of M-8870s. As illustrated in the
Common Crystal Connection below, a single crystal
can be used to connect a series of M-8870s by cou-
pling the oscillator output of each M-8870 through a 30
pF capacitor to the oscillator input of the next M-8870.
相關PDF資料 |
PDF描述 |
|---|---|
| M-8880 | M-8880 DTMF Transceiver |
| M-959 | Dial Pulse Counter and Hook Status Monitor |
| M-980-02P | 190840005 |
| M-980-02S | 3V/5V General Purpose Call Progress Tone Detector |
| M-980-02T | 3V/5V General Purpose Call Progress Tone Detector |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| M-8880 | 制造商:CLARE 制造商全稱:Clare, Inc. 功能描述:M-8880 DTMF Transceiver |
| M-8880-01P | 功能描述:IC TRANSCEIVER DTMF CMOS 20-DIP RoHS:是 類別:集成電路 (IC) >> 接口 - 電信 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS 產(chǎn)品變化通告:Product Discontinuation 06/Feb/2012 標準包裝:750 系列:* |
| M-8880-01SM | 功能描述:IC TRANSCEIVER DTMF CMOS 20-SOIC RoHS:是 類別:集成電路 (IC) >> 接口 - 電信 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS 產(chǎn)品變化通告:Product Discontinuation 06/Feb/2012 標準包裝:750 系列:* |
| M-8880-01T | 功能描述:IC TRANSCEIVER DTMF CMOS 20-SOIC RoHS:是 類別:集成電路 (IC) >> 接口 - 電信 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS 產(chǎn)品變化通告:Product Discontinuation 06/Feb/2012 標準包裝:750 系列:* |
| M-8888 | 制造商:CLARE 制造商全稱:Clare, Inc. 功能描述:DTMF Transceiver |
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