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U4055B1 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 U4055B1
기능 Low-Voltage Electronic Speech Circuit
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U4055B1 데이터시트, 핀배열, 회로
U4055B/U4055B1
Low-Voltage Electronic Speech Circuit with Dialer Interface
Description
The U4055B electronic speech circuit is a linear
integrated circuit for use in telephone and other line fed
terminal equipment. It replaces the common speech
circuit with carbon microphone, hybrid transformer,
sidetone equivalent and ear protection rectifiers. A
low-cost electrodynamic transducer is used as the
earphone. It contains all components necessary for
amplification of signals and adaption to the line.
Features
www.DataSheet4U.cDomAn electronic circuit replaces the microphone hybrid
transformer
D Symmetrical input for dynamic or piezo microphone
D High performance through the use of dynamic
transducers as the earphone (non-linear distortion
x 2%)
D Automatic line loss compensation
D DTMF interface with muting
D Supply voltage for dialer
D High range of line feeding current
D Input resistance independent of line current and
sidetone suppression circuit.
D Built-in ear protection by earphone voltage limiter
D Operation possible from 8 mA
U4055B1: High level mute; U4055B: Low level mute
Figure 1. Block diagram and pin connection
TELEFUNKEN Semiconductors
Rev. A1, 06-May-96
Preliminary Information
1 (10)




U4055B1 pdf, 반도체, 판매, 대치품
U4055B/U4055B1
Electrical Characteristics
Reference point Pin 3, cable equivalent = I = 1 km, 0.5 mm, R’ = 184 , C’ = 37 nF, f = 1300 Hz, 0 dBm = 775 mVrms,
RDC = 56 / 2 W, Tamb = 25°C, unless otherwise specified.
Parameters
Test Conditions / Pins
Symbol Min. Typ. Max. Unit
Line voltage
IL = 8 mA
IL = 20 mA
IL = 30 mA
IL = 73 mA,
see figure 4
VL 1.8 2.1 2.6 V
3.0 3.3 3.6 V
3.6 4.5 V
7.7 9.7 V
Transmit and sidetone
see figure 5
Input resistance
www.DataSheetG4Ua.icnom
Pin 7 - 8
Ri 7 10 13 k
IL = 30 mA = l = 5 km
adjustable with RAGC
Gs 57 59 61 dB
D Gs –7
–9 dB
IL = 30 to 73 mA l = 5 km to
0 km
Noise at line weighted
psophometrically
Sidetone reduction
DTMF-Amplifier
IL = 73 mA l = 0 km
yVMIC = 0 V
IL 20 mA
see figure 6
no
GSTA
10
–70 –68 dBm
15 20 dB
Input resistance
DTMF Gain
yVolume range d 5%
Receiving amplifier
Pin 8 - 3
RD 8
10 13 k
IL = 30 mA I = 5 km
GD 9
13 dB
Rex1 = 0 adjustable with Rex1
D GD
–7
–9 dB
IL = 31 mA to 78 mA = l =
5 km to 0 km
see figure 4
V0 1
VRMS
Input resistance
Gain
Pin 12 - 3
Ri 50 k
RHH = 300 Ω, IL = 30 mA l = GR
–1
–3
–5 dB
5 km
RHH = 300 adjustable with
D GR
–5
–6
–7 dB
RAGC,
IL = 31 mA to 78 mA
l = 5 km to 0 km
Receiving noise at earphone
weighted psophometrially
Gain change when muted
Output saturation threshold
MUTE or MUTE-input
IL = 78 mA = l = 0 km
S2 = 0
yIL 20 mA
yIL 20 mA
ni –80 –71 dBm
GRM
15
20
24 dB
V0 0.8 1 1.5 Vpp
MUTE-input current
Pin 9 = 0 V
IM 20 50 80 µA
MUTE off input voltage
VMoff
1.5
V
MUTE on input voltage
VM on
0.3 V
MUTE-input current
Pin 9 = 1.5 V
IM 10 20 30 µA
MUTE off input voltage
VM off
0.3 V
MUTE on input voltage
VM on
1.5
V
Supply voltage
see figure 4
yIL 20 mA MUTE or MUTE
V+
3
6.1 V
Output voltage
switched off
switched on
2.5 2.9 3.1 V
Output current
Pin 10
yIL 20 mA MUTE or MUTE
switched off
switched on
I+
1
30 µA
mA
Pin 10
4 (10)
TELEFUNKEN Semiconductors
Preliminary Information
Rev. A1, 06-May-96

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U4055B1 전자부품, 판매, 대치품
www.DataSheet4U.com
U4055B/U4055B1
Figure 5. Transmitting amplification
TELEFUNKEN Semiconductors
Rev. A1, 06-May-96
Preliminary Information
7 (10)

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관련 데이터시트

부품번호상세설명 및 기능제조사
U4055B

Low-Voltage Electronic Speech Circuit

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U4055B1

Low-Voltage Electronic Speech Circuit

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