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參數(shù)資料
| 型號： | LS656 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Telephone Speech Circuit With Multifrequency Tone Generator Interface(帶多頻語音發(fā)生器接口的電話語音電路) |
| 中文描述： | 電話語音電路多頻音發(fā)生器接口（帶多頻語音發(fā)生器接口的電話語音電路） |
| 文件頁數(shù)： | 5/15頁 |
| 文件大?。?/td> | 192K |
| 代理商： | LS656 |
ELECTRICAL CHARACTERISTICS
(continued)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
Fig.
MULTIFREQUENCY SYNTHESIZER INTERFACE
V
DD
MF Supply Voltage Stand by and
Operation
S2 in (b)
2.4
2.5
2.7
V
–
I
DD
MF Supply Current Stand by
Operation
S2 in (b)
0.5
2
mA
mA
–
–
MF Amplifier Gain
f
MF in
= 1kHz, V
MF in
= 80mV
15
17
dB
4
V
I
DC Input Voltage Level (pin 14)
V
MF in
= 80mV
V
x 0.3
V
–
R
I
Input Impedance (pin 14)
V
MF in
= 80mV
60
k
–
d
Distortion
V
MF in
= 150mVp, I
L
> 17mA
4
%
4
Starting Delay Time
5
ms
–
Muting Threshold Voltage (pin3)
Speech Operation
MF Operation
1.6
1
V
V
–
–
Muting Stand by Current (pin 3) )
– 10
μ
A
–
Muting Operating Current (pin 3)
S2 in (b)
+ 10
μ
A
–
CIRCUIT DESCRIPTION
1. DC Characteristic
The fig. 5 shows the DC equivalent circuit of the
LS656.
A fixed amount I
o
of the total available currentI
L
is
drained for the proper operation of the circuit. The
valueofI
o
canbeprogrammedexternallybychang-
ing the valueof thebiasresistor connectedto pin 4
(see blockdiagram).
The minimum valueof I
o
is 7.5 mA.
The voltage V
o
= 37 V of the shunt regulator is in-
dependentof the line current.
The shunt regulator(2) is controlledby a tempera-
ture compensated voltage reference (1) (see the
Figure5
: EquivalentDC Loadto the Line.
block diagram).
Fig. 6shows amoredetailedcircuit configurationof
the shunt regulator.
ThedifferenceI
L
-I
o
flowsthroughtheshuntregulator
beingI
b
negligible.I
a
is an internalconstantcurrent
generator; henceV
o
= V
B
+ I
a
. R
a
= 3.7 V.
The V
L
, I
L
characteristic of the device is therefore
similar to a pure resistance in series to a battery.
It isimportant tonotethat the DC voltageat pin 5is
proportionalto theline current (V
5
= V
7
+ V
B =
(I
L
-
I
o
) R3 + V
B
).
The DC characteristic of the LS656 is shown in
fig.7.
LS656
5/15
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LS656AB | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:TELEPHONE SPEECH CIRCUIT WITH MULTIFREQUENCY TONE GENERATOR INTERFACE |
| LS656AD1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:TELEPHONE SPEECH CIRCUIT WITH MULTIFREQUENCY TONE GENERATOR INTERFACE |
| LS656B | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:TELEPHONE SPEECH CIRCUIT WITH MULTIFREQUENCY TONE GENERATOR INTERFACE |
| LS65C6D-T | 功能描述:Tactile Switch SPST-NO Top Actuated Surface Mount 制造商:citizen 系列:LS65C 包裝:剪切帶（CT） 零件狀態(tài):有效 電路:SPST-NO 開關(guān)功能:關(guān)-瞬時 不同電壓時的觸頭額定電流:0.02A @ 12VDC 致動器類型:標(biāo)準(zhǔn) 安裝類型:表面貼裝 PCB 外致動器高度（從引腳計算）:0.60mm 致動器方向:頂部觸動 端子類型:SMD（SMT）接片 外形:3.28mm x 2.60mm 照明:不發(fā)光 照明電壓（標(biāo)稱值）:- 照明類型，顏色:- 作用力:340gf 侵入防護(hù):- 特性:- 致動器材料:- 開關(guān)行程:0.15mm 機(jī)械壽命:100，000 次循環(huán) 工作溫度:- 標(biāo)準(zhǔn)包裝:1 |
| LS680-1 | 制造商:TAIYO-YUDEN 制造商全稱:Taiyo Yuden (U.S.A.), Inc 功能描述:12 Volt Input Four Tube CCFT Inverter (8W) Brightness Control |
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