L3281 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
L3281 Datasheet PDF : 10 Pages
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L3281
ELECTRICAL CHARACTERISTICS IL = 20 to 100mA; R4 =( 51Ω // diode) + 33Ω;
T = 25°C; f = 1kHz; Unless Otherwise Specified
Symbol
Vl
Parameter
Line Voltage
CMRR
Gtx
DGtx
THDtx
Ntx
Zml
Grx
DGrx
THDrx
Common Mode Rej. Ratio
Sending Gain
Delta Sending Gain
Sending Distortion
Sending Noise
Mic. Input Impedance
Receiving Gain
Delta Receiving Gain
Receiving Distortion
Nrx
Zro
Zm
Vso
Iro
MUlo
MUhl
Gmf
Rmf
THDmf
Gbeep
Rbeep
THDbeep
Vz
Ileak
Receiving Noise
Rec. Output Impedance
Sidetone
Line Match. Impedance
Sending Output Voltage
Receiving Output Current
Mute Input Low
Mute Input Open
DTMF Gain
DTMF Input Impedance
DTMF Distortion
Beeptone Gain
Beeptone Input Impedance
Beeptone Distortion
Zener Voltage (Pin 5)
Leakage Current,Vpin5 = 3V
Test Condition
IL = 6.5mA
IL = 20mA
IL = 50mA
IL = 80mA
Vmi = 10mV; IL = 20mA
Vmi = 10mV; IL = 70mA
Vso = 700mV; IL = 20mA
Vmi = 0V; IL = 50mA
Vmi = 10mV
IL = 20mA; Vri = 0.2V
IL = 70mA; Vri = 0.2V
Vro = 350mV; Load = 350Ω
Vro = 300mV; IL = 10 mA
Vri = 0V
Load = 200Ω; Vro = 50V
Vmi = 10mV
Vri = 0.2V
IL = 6.5mA; THD = 5%
IL = 6.5mA; THD = 5%
Dialing Mode
Speaking Mode
Vmf IN = 10mV
Vmf LN = 140mV
Vbeep IN = 25mV
Vbeep IN = 100mV; IL = 20mA
Iz = 1 mA
Min.
50
30
– 7.2
Typ.
1.65
3.4
6.0
8
31.5
–5.7
40
– 10.7
– 7.2
– 70
– 9.2
– 5.7
100
10
10
500 600
100
0.5
50
14.5
16
5
10
8.5
5.5
8
0.5
4.2
5.1
20
Max.
3.7
6.5
9.5
33
–4.2
5
– 7.7
– 4.2
5
5
20
700
100
1
17.5
5
5
6.2
Unit
V
V
V
V
dB
dB
dB
%
dB
kΩ
dB
dB
%
%
µV
Ω
dB
Ω
mV
mAp
µA
µA
dB
kΩ
%
dB
kΩ
%
V
µA
4/10
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