U4080B Datasheet, PDF (5/15 Pages) TEMIC Semiconductors – Voice-Switched Circuit for Handsfree Operation

U4080B
Parameters
Test Conditions / Pins Symbol Min.
Typ.
Max.
Unit
Speaker amplifier
Pins 15 and 19
Gain, V₁₉ = 20 mV_rms
Input impedance
Output voltage (Pin 19 =
G_SA
33
34
35
dB
R_I
15
22
37
kΩ
cap coupled to GND)
High output voltage
V_O
2.4
3.0
3.6
V
V₁₉ = 0.1 V,
V₁₅ = –100 mA
Low output voltage
V₁₉ = –0.1 V,
V₁₅ = +100 mA
Log amplifiers
V_OH
5.5
V_OL
V
600
mA
Receive level detector
leakage current
V₈ = V_B + 1.0 V
Transmit level detector
Pin 8
I_LR
2.0
mA
leakage current
V₆ = V_B + 1.0 V
Transmit-Receive
switching threshold
V₈/V₆ at 20 µA to switch
T-R comparator
Transmit detector
Pin 6
I_LT
Pins 5 and 7
Pin 25
I_TH
0.8
Pin 23
2.0
mA
1.2
DC voltage: Idle mode
V₂₃
0
V
T mode
V₂₃
4.0
Distortion
Pins 15 and 27
R mode: RECI to SAO
V₂₇ = 10 mV_rms’, f = 1 kHz
T mode: MIC to TO
V₉ = 5 mV_rms’ f = 1 kHz
d
1.5
%
d
2.0
%
TELEFUNKEN Semiconductors
5 (15)
Rev. A1, 20-May-96
Preliminary Information