ATMEL U4090B-P

Features
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DC Characteristic Adjustable
Transmit and Receive Gain Adjustable
Symmetrical Input of Microphone Amplifier
Anti-clipping in Transmit Direction
Automatic Line-loss Compensation
Symmetrical Output of Earpiece Amplifier
Built-in Ear Protection
DTMF and MUTE Input
Adjustable Sidetone Suppression Independent of Sending
and Receiving Amplification
Speech Circuit with Two Sidetone Networks
Built-in Line Detection Circuit
Integrated Amplifier for Loud-hearing Operation
Anti-clipping for Loudspeaker Amplifier
Improved Acoustical Feedback Suppression
Power Down
Voice Switch
Tone Ringer Interface with DC/DC Converter
Zero Crossing Detection
Common Speaker for Loud-hearing and Tone Ringer
Supply Voltages for all Functional Blocks of a Subscriber Set
Integrated Transistor for Short-circuiting the Line Voltage
Answering Machine Interface
Operation Possible from 10 mA Line Currents
Filters against EMI on Critical I/O
Monolithic
Integrated
Feature Phone
Circuit EMI
Improved
U4090B-P
Applications
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Feature Phone
Answering Machine
Fax Machine
Speaker Phone
Benefits
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Savings of One Piezoelectric Transducer
Complete System Integration of Analog Signal Processing on One Chip
Very Few External Components
Fewer Components for EMI Protection
Rev. 4741C–CORD–11/05
1. Description
The microcontroller-controlled telephone circuit U4090B-P is a linear integrated circuit for use in
feature phones, answering machines and fax machines. It contains the speech circuit, tone
ringer interface with DC/DC converter, sidetone equivalent and ear protection rectifiers. The circuit is line powered and contains all components necessary for amplification of signals and
adaptation to the line.
An integrated voice switch with loudspeaker amplifier allows loud-hearing or hands-free operation. With an anti-feedback function, acoustical feedback during loud-hearing can be reduced
significantly. The generated supply voltage is suitable for a wide range of peripheral circuits.
Figure 1-1.
2
Block Diagram
Speech
circuit
Audio
amplifier
Voice
switch
Tone
ringer
Loudhearing
and
Tone ringing
MC with
EEPROM/
DTMF
U4090B-P
4741C–CORD–11/05
4741C–CORD–11/05
SAI
TSACL
SAO
ATAFS
TLDT
TLDR
INLDT
INLDR
TTXA
DTMF
MIC2
MIC1
24
22
12
26
29
30
27
28
42
2
MIC
TX
ACL
GSA
23
SAI
SACL
SA
Acoustical
feedback
suppression
control
DTMF
4
5
MUTX
25
control
44
MUTR
35
Mute
receive
control
Transmit
mute
3
TXA
36
40
41
39
RA1
900Ω
Impedance
control
21
8
600Ω
IMPSEL
VL
RECO2 RECO1 GR RAC
-1
RA2
33
STO
BAL
ST
control
AGA
31
AGA
STIL
38
+
-
7
IND
STIS
37
+
-
Line
detect
IL
VL
Receive
RECIN
43
supply
Current
VMP
ISupply
attenuation
QS
supply
Power
14
11
10
VMP
SENSE VB
+
-
-
+
13
VMPS
18
19
15
16
17
20
32
6
9
34
THA
RFDO
SWOUT
COSC
VRING
LIDET
IREF
PD
GND
VM
Figure 1-2.
1
GT MICO TXIN
U4090B-P
Detailed Block Diagram
3
2. Pin Configuration
Figure 2-1.
Pinning SSO44
GT
1
44
TXIN
DTMF
2
43
RECIN
MICO
3
42
TTXA
MIC2
4
41
GR
MIC1
5
40
RECO1
PD
6
39
RAC
IND
7
38
STIL
VL
8
37
STIS
GND
9
36
RECO2
SENSE 10
35
MUTR
34
VM
SAO 12
33
STO
VMPS 13
32
IREF
VMP 14
31
AGA
SWOUT 15
30
TLDR
COSC 16
29
TLDT
VRING 17
28
INLDR
THA 18
27
INLDT
RFDO 19
26
ATAFS
LIDET 20
25
MUTX
IMPSEL 21
24
SAI
TSACL 22
23
GSA
VB
11
U4090B-P
4
U4090B-P
4741C–CORD–11/05
U4090B-P
Table 2-1.
Pin Description
Pin
Symbol
Function
1
GT
2
DTMF
Input for DTMF signals, also used for the answering machine and hands-free input
3
MICO
Output of microphone preamplifier
4
MIC2
Non-inverting input of microphone amplifier
5
MIC1
Inverting input of microphone amplifier
6
PD
Active high input for reducing the current consumption of the circuit, simultaneously VL is shorted by an
internal switch
7
IND
The internal equivalent inductance of the circuit is proportional to the value of the capacitor at this pin, a
resistor connected to ground may be used to reduce the DC line voltage
8
VL
Line voltage
9
GND
10
SENSE
11
VB
12
SAO
13
VMPS
14
VMP
15
SWOUT
16
COSC
40-kHz oscillator for ringing power converter
17
VRING
Input for ringing signal protected by internal Zener diode
18
THA
19
RFDO
Output of ringing frequency detector
20
LIDET
Line detect; output is low when the line current is more than 15 mA
A resistor from this pin to GND sets the amplification of the microphone and DTMF signals, the input
amplifier can be muted by applying VMP to GT
Reference point for DC- and AC-output signals
A small resistor (fixed) connected from this pin to VL sets the slope of the DC characteristic and also
effects the line-length equalization characteristics and the line current at which the loudspeaker amplifier
is switched on
Unregulated supply voltage for peripheral circuits (voice switch), limited to typically 7V
Output of loudspeaker amplifier
Unregulated supply voltage for micorcontroller, limited to 6.3V
Regulated supply voltage of 3.3V for peripheral circuits (especially microprocessors), minimum output
current: 2 mA (ringing) 4 mA (speech mode)
Output for driving external switching transistor
Threshold adjustment for ringing frequency detector
21
IMPSEL
Control input for selection of line impedance
1. 600Ω
2. 900Ω
3. Mute of second transmit stage (TXA); also used for indication of external supply (answering machine);
last chosen impedance is stored
22
TSACL
Time constant of anti-clipping of speaker amplifier
23
GSA
Current input for setting the gain of the speaker amplifier, adjustment characteristic is logarithmical, or
RGSA > 2 MΩ, the speaker amplifier is switched off
24
SA I
Speaker amplifier input (for loudspeaker, tone ringer and hands-free use)
25
MUTX
Three-state input of transmit mute:
1. Speech condition; inputs MIC1/MIC2 active
2. DTMF condition; input DTMF active. A part of the input signal is passed to the receiving amplifier as a
confidence signal during dialing
3. Input DTMF used for answering machine and hands-free use; receive branch not affected
26
ATAFS
Attenuation of acoustical feedback suppression, maximum attenuation of AFS circuit is set by a resistor
at this pin, without the resistor, AFS is switched off
27
INLDT
Input of transmit level detector
28
INLDR
Input of receive level detector
29
TLDT
Time constant of transmit level detector
5
4741C–CORD–11/05
Table 2-1.
Pin Description (Continued)
Pin
Symbol
30
TLDR
Time constant of receive level detector
31
AGA
Automatic gain adjustment with line current, a resistor connected from this pin to GND sets the starting
point, maximum gain change: 6 dB.
32
IREF
Internal reference current generation; RREF = 62 kΩ; IREF = 20 µA
33
STO
Sidetone reduction output
Output resistance approximate: 300Ω,
Maximum load impedance: 10 kΩ.
34
VM
Reference node for microphone-earphone and loudspeaker amplifier, supply for electret microphone
(IM ≤ 700 mA)
Note:
Function
35
MUTR
Three-state mute input
1. Normal operation
2. Mute for ear piece
3. Mute for RECIN signal
Condition of earpiece mute is stored
36
RECO2
Inverting output of receiving amplifier
37
STIS
Input for sidetone network (short loop) or for answering machine
38
STIL
Input for sidetone network (long loop)
39
RAC
Input of receiving amplifier for AC coupling in feedback path
40
RECO1
41
GR
42
TTXA
Time constant of anti-clipping in transmit path
43
RECIN
Input of receiving path; input impedance is typically 80 kΩ
44
TXIN
Output of receiving amplifier
A resistor connected from this pin to GND sets the receiving amplification of the circuit; amplifier RA1 can
be muted by applying VMP to GR
Input of intermediate transmit stage, input resistance is typically 20 kΩ
Filters against electromagnetic interference (EMI) are located at following pins: MIC1, MIC2, RECIN, TXIN, STIS, STIL and
RAC.
3. DC Line Interface and Supply-voltage Generation
The DC line interface consists of an electronic inductance and a dual-port output stage which
charges the capacitors at VMPS and VB. The value of the equivalent inductance is given by:
L = RSENSE × CIND × ((RDC × R30)/(RDC + R30))
In order to improve the supply during worst-case operating conditions, two PNP current sources
- IBOPT and IMPSOPT - hand an extra amount of current to the supply voltages when the NPNs in
parallel are unable to conduct current.
A flowchart for the control of the current sources (Figure 3-2) shows how a priority for supply
VMPS is achieved.
6
U4090B-P
4741C–CORD–11/05
U4090B-P
Figure 3-1.
DC Line Interface with Electronic Inductance and Generation of a Regulated and an Unregulated Supply
VL
10Ω SENSE
RSENSE
IMPSOPT
< 5 mA
IBOPT
< 5 mA
CIND
VMPS
6.3V
10 µF
IND
RDC
Figure 3-2.
VMP
3.3V
R30
30 kΩ
=
470 µF
=
+
+
-
+
-
VOFFS
7.0V
3.3V/
2 mA
47 µF
VB
220 µF
Supply Capacitors CMPS and CB Are Charged with Priority on CMPS
Y
VMPS < 6.3V
Y
VSENSE - VMPS > 200 mV
N
N
VSENSE - VB > 200 mV
N
IMPSOPT = 0
IBOPT = 0
Y
VB < 6.3V
N
Y
Charge CMPS
(IMPSOPT)
Charge CB
(IBOPT)
Reduce IBOPT
(IMPSOPT = 0)
7
4741C–CORD–11/05
Figure 3-3.
Supply of Functional Blocks Controlled by Input Voltages VL, VB, VRING and by Logic Inputs PD and IMPSEL
VRING
VB
RPC
Voltage
regulator
7V
Voltage
regulator
6.3V
VMP
VMPS
Power
supply
VL
QS
PD
LIDET
ES IMPED
CONTR
IMPSEL
LIDET
VLON
RFD
RFDO
TXA
TXACL
OFFSA
COMP
SAI,SA
SACL
AFS
MIC, DTMF
AGA, RA1, RA2
TX MUTE
MUT REC, STBAL
RECATT
The U4090B-P contains two identical series regulators which provide a supply voltage VMP of
3.3V suitable for a microprocessor. In speech mode, both regulators are active because VMPS
and VB are charged simultaneously by the DC-line interface. Output current is 4 mA. The capacitor at V MPS is used to provide the microcomputer with sufficient power during long-line
interruptions. Thus, long flash pulses can be bridged or an LCD display can be turned on for
more than 2 seconds after going on hook. When the system is in ringing mode, VB is charged by
the on-chip ringing power converter. In this mode only one regulator is used to supply VMP with a
maximum of 2 mA.
3.1
Supply Structure of the Chip
A major benefit of the chip is that it uses a very flexible supply structure which allows simple realization of numerous applications such as:
• Group listening phone
• Hands-free phone
• Ringing with the built in speaker amplifier
• Answering machine with external supply
The special supply topology for the various functional blocks is illustrated in Figure 3-3.
8
U4090B-P
4741C–CORD–11/05
U4090B-P
There are four major supply states:
1. Speech condition: In speech condition the system is supplied by the line current. If the
LIDET-block detects a line voltage above the fixed threshold (1.9 V), the internal signal
VLON is activated, thus switching off RFD and RPC and switching on all other blocks of
the chip. At line voltages below 1.9V, the switches remain in their quiescent state as
shown in Figure 3-4 on page 10.
OFFSACOMP disables the group listening feature (SAI, SA, SACL, AFS) below line
currents of approximately 10 mA.
2. Power down (pulse dialing): When the chip is in power-down mode (PD = high), e.g.,
during pulse dialing, the internal switch QS shorts the line and all amplifiers are
switched off. In this condition, LIDET, voltage regulators and IMPED CONTR are the
only active blocks.
3. Ringing: During ringing, the supply for the system is fed into VB via the ringing power
converter (RPC). The only functional amplifiers are in the speaker amplifier section
(SAI, SA, SACL).
4. External supply: In an answering machine, the chip is powered by an external supply
via pin VB. This application allows the possibility to activate all amplifiers (except the
transmit line interface TXA). Selecting IMPSEL = high impedance activates all switches
at the ES line.
3.2
Acoustic Feedback Suppression
Acoustical feedback from the loudspeaker to the handset microphone may cause instability in
the system. The U4090B-P offers a very efficient feedback suppression circuit, which uses a
modified voice switch topology. Figure 3-4 on page 10 shows the basic system configuration.
Two attenuators (TX ATT and RX ATT) reduce the critical loop gain by introducing an externally
adjustable amount of loss either in the transmit or in the receive path. The sliding control in block
ATT CONTR determines, whether the TX or the RX signal has to be attenuated. The overall loop
gain remains constant under all operating conditions.
Selection of the active channel is made by comparison of the logarithmically compressed TXand RX- envelope curve.
The system configuration for group listening, which is realized in the U4090B-P, is illustrated in
Figure 3-6 on page 11. TXA and SAI represent the two attenuators, the logarithmic envelope
detectors are shown in a simplified way (operational amplifiers with two diodes).
9
4741C–CORD–11/05
Figure 3-4.
Basic Voice Switch System
TX
Att
Handset
microphone
Log
Hybrid
Line
Att
contr
Log
Loudspeaker
Figure 3-5.
RX
Att
Integration of the Acoustic Feedback Suppression Circuit into the Speech Circuit Environment
VL
GT
MICO
TIN
INLDT
VBG
TLDT
+
STO
VL
ZL
TXA
Zint
SAO
AFS
control
Max
att.
AGA
GSA
+ VBG
SAI
SAI
TLDR
INLDR
RECIN
RECO1
GR STIS
STO
STN
10
U4090B-P
4741C–CORD–11/05
U4090B-P
Figure 3-6.
Acoustic Feedback Suppression by Alternative Control of Transmit and Speaker
Amplifier Gain
TLDT
TXA
TX
SAI
RLDT
INLDT
AGA
AGA
RX
IAGAFS
RLDR
IAT
IGSA
IATAFS
INLDR
IATGSA
TLDR
ATAFS
GSA
RATAFS
A detailed diagram of the AFS (acoustic feedback suppression) is given in Figure 3-6. Receive
and transmit signals are first processed by logarithmic rectifiers in order to produce the envelopes of the speech at TLDT and RLDT. After amplification, a decision is made by the differential
pair which direction should be transmitted.
The attenuation of the controlled amplifiers TXA and SAI is determined by the emitter current
IAT which consists of three parts:
IATAS
IATGSA
IAGAFS
sets maximum attenuation
decreases the attenuation when speaker amplifier gain is reduced
decreases the attenuation according to the loop gain reduction caused
by the AGA function
IAT = IATAFS – IATGSA – IAGAFS
∆G = IAT × 0.67 dB/µA
Figure 3-7 on page 12 illustrates the principle relationship between speaker amplifier gain (GSA)
and attenuation of AFS (ATAFS). Both parameters can be adjusted independently, but the internal coupling between them has to be considered. The maximum usable value of GSA is 36 dB.
The shape of the characteristic is moved in the x-direction by adjusting resistor RATAFS, thus
changing ATAFSm. The actual value of attenuation (ATAFSa), however, can be determined by
reading the value which belongs to the actual gain GSA a . If the speaker amplifier gain is
reduced, the attenuation of AFS is automatically reduced by the same amount in order to
achieve a constant loop gain. Zero attenuation is set for speaker gains
GSA ≤ GSA0 = 36 dB – ATAFSm.
11
4741C–CORD–11/05
Figure 3-7.
Reducing Speaker Amplifier Gain Results in an Equal Reduction of AFS
Attenuation
ATAFS (dB)
ATAFSm
ATAFSa
GSAo
Figure 3-8.
RATAFS
RATAFS
GSAa
not usable
36 dB GSA (dB)
Line Detection with Two Comparators for Speech Mode and Pulse Dialing
LIDET
IL
PD
3.3
Line Detection (LIDET)
The line current supervision is active under all operating conditions of the U4090B-P. In speech
mode (PD = inactive), the line-current comparator uses the same thresholds as the comparator
for switching off the entire speaker amplifier. The basic behavior is illustrated in Figure 3-9 on
page 13. Actual values of ILON/ILOFF vary slightly with the adjustment of the DC characteristics
and the selection of the internal line impedance.
When Power Down is activated (during pulse dialing), the entire line current flows through the
short-circuiting transistor QS (see Figure 3-3 on page 8). As long as IL is above typically 1.6 mA,
output LIDET is low. This comparator does not use hysteresis.
12
U4090B-P
4741C–CORD–11/05
U4090B-P
Figure 3-9.
Line Detection in Speech Mode with Hysteresis
LIDET
ILOFF
3.4
ILON
IL
Ringing Power Converter (RPC)
The RPC transforms the input power at VRING (high voltage/low current) into an equivalent output power at V B (low voltage/high current) which is capable of driving the low-ohmic
loudspeaker. Input impedance at VRING is fixed at 5 kΩ and the efficiency of the step-down converter is approximate 65%.
Figure 3-10. Comparator Thresholds Depending on DC Mask and Line Impedance
7
RDC = ∞
VL (V)
6
RDC = 130 kΩ
5
RDC = 68 kΩ
4
3
10
12
14
16
18
20
IL (mA)
= ILON
at line impedance = 600Ω
= ILOFF
= ILON
at line impedance = 900Ω
= ILOFF
3.5
Ringing Frequency Detector (RFD)
The U4090B-P offers an output signal for the microcontroller, which is a digital representation of
the double ringing frequency. It is generated by a current comparator with hysteresis. The input
voltage VRING is transformed into a current via RTHA. The thresholds are 8 µA and 24 µA. RFDO
and VRING are in phase. A second comparator with hysteresis is used to enable the output RFDO
as long as the supply voltage for the microprocessor VMP is above 2.0V.
13
4741C–CORD–11/05
4. Absolute Maximum Ratings
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this
specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Parameters
Symbol
Value
Unit
Line current
IL
140
mA
DC line voltage
VL
12
V
IRING
15
mA
Maximum input current, pin 17
Junction temperature
Tj
125
°C
Ambient temperature
Tamb
–25 to +75
°C
Storage temperature
Tstg
–55 to +150
°C
Total power dissipation, Tamb = 60°C
Ptot
0.9
W
Symbol
Value
Unit
RthJA
70
K/W
5. Thermal Resistance
Parameters
Junction ambient SSO44
6. Electrical Characteristics
f = 1 kHz, 0 dBm = 775 mVrms, IM = 0.3 mA, IMP = 2 mA, RDC = 130 kΩ, Tamb = 25°C, RGSA = 560 kΩ,
Zear = 68 nF + 100Ω, ZM = 68 nF, pin 31 open, VIMPSEL = GND, VMUTX = GND, VMUTR = GND, unless otherwise specified.
Parameters
Test Conditions
Symbol
Min.
Typ.
Max.
Unit
DC Characteristics
DC voltage drop over circuit
IL = 2 mA
IL = 14 mA
IL = 60 mA
IL = 100 mA
8.8
2.4
5.0
7.5
9.4
10.0
GT
40
45
50
dB
GT
47
39.8
48
49
41.8
dB
VL
4.6
5.4
V
Transmission Amplifier, IL = 14 mA, VMIC = 2 mV, RGT = 27 kΩ, Unless Otherwise Specified
Range of transmit gain
Transmitting amplification
RGT = 12 kΩ
RGT = 27 kΩ
Frequency response
IL ≥ 14 mA
f = 300 to 3400 Hz
∆GT
±0.5
dB
Gain change with current
Pin 31 open
IL = 14 to 100 mA
∆GT
±0.5
dB
Gain deviation
Tamb = –10 to +60° C
∆GT
±0.5
dB
CMRR of microphone amplifier
CMRR
60
80
45
50
75
Input resistance of MIC amplifier
RGT = 12 kΩ
RGT = 27 kΩ
Ri
Distortion at line
IL > 14 mA
VL = 700 mVrms
dt
Maximum output voltage
IL > 19 mA, d < 5%
VMIC = 25 mV
CTXA = 1 µF
IMPSEL = open
RGT = 12 kΩ
14
VLmax
VMICOmax
1.8
3
–5.2
dB
110
kΩ
2
%
4.2
dBm
dBm
U4090B-P
4741C–CORD–11/05
U4090B-P
6. Electrical Characteristics (Continued)
f = 1 kHz, 0 dBm = 775 mVrms, IM = 0.3 mA, IMP = 2 mA, RDC = 130 kΩ, Tamb = 25°C, RGSA = 560 kΩ,
Zear = 68 nF + 100Ω, ZM = 68 nF, pin 31 open, VIMPSEL = GND, VMUTX = GND, VMUTR = GND, unless otherwise specified.
Parameters
Test Conditions
Noise at line psophometrically
weighted
IL > 14 mA
GT = 48 dB
Anti-clipping attack time
release time
CTXA = 1 µF
each 3 dB overdrive
Gain at low operating current
IL = 10 mA
IMP = 1 mA
RDC = 68 kΩ
VMIC = 1 mV
IM = 300 µA
GT
Distortion at low operating current
IL = 10 mA
IM = 300 µA
IMP = 1 mA
RDC = 68 kΩ
VMIC = 10 mV
dt
Line loss compensation
IL = 100 mA
RAGA = 20 kΩ
∆GTI
–6.4
–5.8
IL ≥ 14 mA
MUTX = open
GTM
60
80
IMPSEL = open
GTTX
60
Mute suppression
a) MIC muted
(microphone preamplifier)
b) TXA muted (second stage)
Symbol
Min.
no
Typ.
Max.
Unit
–80
–72
dBmp
0.5
9
40
ms
42.5
dB
5
%
–5.2
dB
dB
dB
Receiving Amplifier, IL = 14 mA, RGR = 62 kΩ, Unless Otherwise Specified, VGEN = 300 mV
Adjustment range of receiving gain
IL ≥ 14 mA, single ended
differential MUTR = GND
GR
Receiving amplification
RGR = 62 kΩ differential
RGR = 22 kΩ differential
GR
Amplification of DTMF signal from
DTMF IN to RECO 1, 2
IL ≥ 14 mA
VMUTX = VMP
GRM
Frequency response
IL > 14 mA,
f = 300 to 3400 Hz
Gain change with current
–8
–2
+2
+8
dB
–1.75
–1
7.5
–0.25
7
10
13
dB
∆GRF
±0.5
dB
IL = 14 to 100 mA
∆GR
±0.5
dB
Gain deviation
Tamb = –10 to +60°C
∆GR
±0.5
dB
Ear-protection differential
IL ≥ 14 mA, VGEN = 11 Vrms
EP
2.2
Vrms
MUTE suppression
a) RECATT
b) RA2
c) DTMF operation
IL ≥ 14 mA
MUTR = open
VMUTR = VMP
VMUTX = VMP
∆GR
Output voltage d ≤2% differential
IL = 14 mA, Zear = 68 nF + 100Ω
Maximum output current d ≤2%
Zear = 100Ω
Receiving noise psophometrically
weighted
Zear = 68 nF + 100Ω
IL ≥ 14 mA
ni
Output resistance
Each output against GND
Ro
Line loss compensation
RAGA = 20 kΩ, IL = 100 mA
∆GRI
dB
60
dB
0.775
Vrms
4
mA
(peak)
–80
–7.0
–6.0
–77
dBmp
10
Ω
–5.0
dB
15
4741C–CORD–11/05
6. Electrical Characteristics (Continued)
f = 1 kHz, 0 dBm = 775 mVrms, IM = 0.3 mA, IMP = 2 mA, RDC = 130 kΩ, Tamb = 25°C, RGSA = 560 kΩ,
Zear = 68 nF + 100Ω, ZM = 68 nF, pin 31 open, VIMPSEL = GND, VMUTX = GND, VMUTR = GND, unless otherwise specified.
Parameters
Test Conditions
Symbol
Min.
Typ.
Max.
Unit
Gain at low operating current
IL = 10 mA
IMP = 1 mA
IM = 300 µA
VGEN = 560 mV
RDC = 68 kΩ
GR
–2
–1
0
dB
AC impedance
VIMPSEL = GND
VIMPSEL = VMP
Zimp
Zimp
570
840
600
900
640
960
Ω
Ω
Distortion at low operating current
IL = 10 mA
IMP = 1 mA
VGEN = 560 mV
RDC = 68 kΩ
dR
5
%
Minimum line current for operation
No AC signal
ILmin
15
mA
Input resistance
Pin 24
22
kΩ
Gain from SAI to SAO
VSAI = 3 mV
IL = 15 mA
RGSA = 560 kΩ
RGSA = 20 kΩ
Output power
Load resistance
RL = 50Ω, d < 5%
VSAI = 20 mV
IL = 15 mA
IL = 20 mA
PSA
PSA
Output noise (Input SAI open)
psophometrically weighted
IL > 15 mA
nSA
200
µVpsoph
Gain deviation
IL = 15 mA, Tamb = –10 to +60° C
∆GSA
±1
dB
Mute suppression
IL = 15 mA
VL = 0 dBm
VSAI = 4 mV
Pin 23 open
VSAO
–60
dBm
Gain change with current
IL = 15 to 100 mA
∆GSA
±1
dB
Resistor for turning off speaker
amplifier
IL = 15 to 100 mA
RGSA
2
MΩ
Gain change with frequency
IL = 15 mA, f = 300 to 3400 Hz
∆GSA
±0.5
dB
Attack time of anti-clipping
20 dB over drive
Speaker Amplifier
Release time of anti-clipping
14
GSA
35.5
36.5
–3
3
7
20
37.5
dB
mW
0.8
1.3
tr
5
ms
tf
80
ms
DTMF Amplifier Test Conditions: IMP = 2 mA, IM = 0.3 mA, VMUTX = VMP
Adjustment range of DTMF gain
IL = 15 mA mute active
GD
40
DTMF amplification
IL = 15 mA
VDTMF = 8 mV
Mute active: MUTX = VMP
GD
40.7
41.7
Gain deviation
IL = 15 mA, Tamb = –10 to +60°C
GD
Input resistance
RGT = 27 kΩ
RGT = 15 kΩ
Ri
60
26
180
70
Distortion of DTMF signal
IL ≥ 15 mA
VL = 0 dBm
dD
16
50
dB
42.7
dB
±0.5
dB
300
130
kΩ
2
%
U4090B-P
4741C–CORD–11/05
U4090B-P
6. Electrical Characteristics (Continued)
f = 1 kHz, 0 dBm = 775 mVrms, IM = 0.3 mA, IMP = 2 mA, RDC = 130 kΩ, Tamb = 25°C, RGSA = 560 kΩ,
Zear = 68 nF + 100Ω, ZM = 68 nF, pin 31 open, VIMPSEL = GND, VMUTX = GND, VMUTR = GND, unless otherwise specified.
Parameters
Test Conditions
Symbol
Gain deviation with current
IL = 15 to 100 mA
∆GD
Min.
Typ.
Max.
Unit
±0.5
dB
50
dB
AFS Acoustic Feedback Suppression
Adjustment range of attenuation
IL ≥ 15 mA
Attenuation of transmit gain
IL ≥ 15 mA
IINLDT = 0 µA
RATAFS = 30 kΩ
IINLDR = 10 µA
∆GT
45
dB
Attenuation of speaker amplifier
IL ≥ 15 mA
IINLDP = 0 µA
RATAFS = 30 kΩ
IINLDR = 10 µA
∆GSA
50
dB
AFS disable
IL ≥ 15 mA
VATAFS
1.5
3.1
0
V
Supply Voltages, VMIC = 25 mV, Tamb = –10 to +60°C
VMP
IL = 14 mA
RDC = 68 kΩ
IMP = 2 mA
VMP
VMPS
IL = 100 mA
RDC = infinite
IMP = 0 mA
VMPS
VM
IL ≥ 14 mA
IM = 700 µA
RDC = 130 kΩ
VM
VB
IB = 20 mA
IL = 0 mA
VB
3.3
1.3
7
3.5
V
6.7
V
3.3
V
7.6
V
Ringing Power Converter, IMP = 1 mA, IM = 0
Maximum output power
VRING = 20.6V
Threshold of ring frequency detector
RFDO: low to high
VHYST = VRINGON – VRINGOFF
PSA
20
mW
VRINGON
VHYST
17.5
11.0
V
Input impedance
VRING = 30V
Input impedance in speech mode
f = 300 Hz to 3400 Hz IL > 15 mA
VRING = 20V + 1.5Vrms
Logic level of frequency detector
VRING = 0V
VB = 4V
VRING = 25V
VRFDO
Ring detector enable
VRING = 25V, RFDO high
VMPON
1.8
Zener diode voltage
IRING = 25 mA
VRINGmax
30.8
VMUTR = GND
IL > 14 mA
VMUTR = VMP
IMUTE
Mute low; IL > 14 mA
VMUTE
Mute high; IL > 14 mA
VMUTE
RRING
4
RRINGSP
150
5
6
kΩ
kΩ
0
VMP
2.0
V
2.2
V
33.3
V
MUTR Input
MUTR input current
MUTR input voltage
–20
–30
µA
+10
0.3
VMP –
0.3V
V
V
17
4741C–CORD–11/05
6. Electrical Characteristics (Continued)
f = 1 kHz, 0 dBm = 775 mVrms, IM = 0.3 mA, IMP = 2 mA, RDC = 130 kΩ, Tamb = 25°C, RGSA = 560 kΩ,
Zear = 68 nF + 100Ω, ZM = 68 nF, pin 31 open, VIMPSEL = GND, VMUTX = GND, VMUTR = GND, unless otherwise specified.
Parameters
Test Conditions
Symbol
Min.
Typ.
Max.
Unit
PD Input
PD input current
PD active, IL > 14 mA VPD = VMP
Ipd
9
µA
Input voltage
PD = active
PD = inactive
Vpd
Vpd
Voltage drop at VL
IL = 14 mA, PD = active
IL = 100 mA, PD = active
VL
1.5
1.9
V
IL ≥ 14 mA
VIMPSEL = VMP
VIMPSEL = GND
IIMPSEL
IIMPSEL
18
–18
µA
µA
Input high
VIMPSEL
Input low
VIMPSEL
2
0.3
V
Input Characteristics of IMPSEL
Input current
Input voltage
VMP –
0.3V
V
0.3
V
30
–30
µA
µA
MUTX Input
Input current
Input voltage
VMUTX = VMP
VMUTX = GND
IMUTX
IMUTX
Input high
VMUTX
Input low
VMUTX
PD = inactive
ILON
20
–20
VMP –
0.3V
V
0.3
V
Line Detection
Line current for LIDET active
Line current for LIDET inactive
PD = inactive
Current threshold during power down
VB = 5V, PD = active
18
12.6
ILOFF
ILONPD
mA
11.0
0.8
1.6
mA
2.4
mA
U4090B-P
4741C–CORD–11/05
U4090B-P
7. U4090B-P Control
Table 7-1.
Logic Level
Selection of TX Mute and Line Impedance
IMPSEL
MODE
0
Line impedance = 600Ω
TXA = on
ES = off
Speech
0 to Z
Line impedance = 600Ω
TXA = off
ES = on
Transmit-mute
1 to Z
Line impedance = 900Ω
TXA = off
ES = on
Transmit-mute
1
Line impedance = 900Ω
TXA = on
ES = off
Speech
Table 7-2.
Logic Level
Selection of Earpiece Mute and Answering Machine Mode
MUTR
MODE
RA2 = on
RECATT = on
STIS + STIL = on
Speech
0 to Z
RA2 = on
RECATT = off
STIS = on, STIL = off
For answering machine
1 to Z
RA2 = off
RECATT = off
STIS = on, STIL = off
AGA off for STIS
For answering machine
RA2 = off
RECATT = on
STIS + STIL = on
Speech + earpeace mute
0
1
Table 7-3.
Logic Level
Selection of Transmit Mute
MUTX
MODE
0
MIC 1/2 transmit enabled receive enable
AFS = on
AGA = on
TXACL = on
Speech
Z
DTMF transmit enabled receive enable
AFS = on
AGA = on
TXACL = on
For answering machine
1
DTMF transmit enabled
DTMF to receive enable
AFS = off
AGA = off
TXACL = off
DTMF dialling
19
4741C–CORD–11/05
Table 7-4.
Specification of Logic Levels
Logic Level
0 = < (0.3V)
Z = > (1V) < (VMP – 1V) or (open input)
1 = > (VMP – 0.3V)
8. Explanation of Abbreviations
RECATT = Receive attenuation
STIS, STIL = Inputs of sidetone balancing amplifiers
ES = External supply
AFS = Acoustic feedback suppression control
AGA = Automatic gain adjustment
RA2 = Inverting receive amplifier
TXACL = Transmit anti-clipping control
Figure 8-1.
Typical DC Characteristic
12
RDC = infinity
10
8
VL (V)
RDC = 68k
6
4
RDC = 130k
2
0
0
10
20
30
40
50
60
70
80
90
100
IL (mA)
Figure 8-2.
Typical Adjustment Range of Transmit Gain
53
51
49
GT (dB)
47
45
43
41
39
37
35
0
5
10
15
20
25
30
35
40
RGT (kΩ)
20
U4090B-P
4741C–CORD–11/05
U4090B-P
Figure 8-3.
Typical Adjustment Range of Receive Gain (Differential Output)
10
8
GR (dB)
6
4
2
0
-2
-4
0
10
20
30
40
50
60
70
80
RGR (kΩ)
Figure 8-4.
Typical AGA Characteristic
0
-1
-2
AGA (dB)
RAGA = 24k
-3
-4
RAGA = 16k
-5
-6
RAGA = 20k
-7
0
10
20
30
40
50
60
70
80
90
100
IL (mA)
Figure 8-5.
Typical Load Characteristic of VB for a Maximum (RDC = Infinity)
DC-characteristic and 3-mW Loudspeaker Output
6.0
5.0
VB (V)
4.0
3.0
IL = 15 mA
IL = 20 mA
IL = 30 mA
2.0
1.0
0
0
2
4
6
8
10
12
14
16
18
IB (mA)
RDC = Infinity; VI = 200 mV/1 kHz; PSAO = 3 mW;
IMP = 2 mA; IM = 300 µA; RGSA = 560k
21
4741C–CORD–11/05
Figure 8-6.
Typical Load Characteristic of VB for a Medium DC-characteristic
(RDC = 130 kΩ) and 3-mW Loudspeaker Output
5.0
4.5
4.0
VB(V)
3.5
3.0
IL = 15 mA
IL = 20 mA
IL = 30 mA
2.5
2.0
1.5
1.0
0.5
0
0
2
4
6
8
10
12
14
16
18
IB (mA)
RDC = 130 k; VI = 200 mV/1 kHz; PSAO = 3 mW;
IMP = 2 mA; IM = 300 µA; RGSA = 560k
Figure 8-7.
Typical Load Characteristic of VB for a Minimum DC-characteristic
(RDC = 68 kΩ) and 3-mW Loudspeaker Output
4.5
4.0
IL = 30 mA
3.5
IL = 15 mA
VB (V)
3.0
IL = 20 mA
2.5
2.0
1.5
1.0
0.5
0
0
2
4
6
8
10
12
14
16
18
IB (mA)
RDC = 68 k, VI = 200 mV, PSAO = 3 mW; IMP = 2 mA;
IM = 300 µA; RGSA = 560k
22
U4090B-P
4741C–CORD–11/05
4741C–CORD–11/05
RGT
2
1
1 kΩ
3
42
1 µF
4
41
68 nF
ZEAR
RGR
5
40
10 µF
6
39
S2 = closed: ringer mode
S1 = closed: speech mode
RDC
3 kΩ
VM
Reference figure for not connected pins
VM
43
44
150 nF
VL
7
10 µF
3 kΩ
22 µF
38
VM
8
600Ω
37
VM
9
36
S1
4.7 nF
10
35
36 kΩ
36 kΩ
10Ω
IL
IM
33
32
11
47 µF
13
220 µF
50Ω
1000 µF
12
U4090B-P
34
100 µF
open
VMP
47 nF
47 nF
47 µF
14
31
62 kΩ
2.2 mH
IDC
IMP
15
30
10 µF
10 µF
68 nF
17
28
S2
18
27
3.3 nF
SD103A
BC556
16
29
3.3 nF
DC
VRING
680 kΩ
19
26
2 MΩ
VMP
20
25
open
VMP
1 µF
open
21
24
22
23
RGSA
Figure 8-8.
220 nF
Mico
U4090B-P
Basic Test Circuit
23
24
3
42
VMIC
1 µF
4
41
68 nF
RGR
VMP
5
40
6
39
RDC
10 µF
VM
7
38
10 µF
ZEAR
Open pins should be connected as shown in Figure 8-14
VB (external supply): S1b
Line detection: S1a
2
1
RGT
43
150 nF
VL
44
220 nF
Mico
8
37
IL
9
4.7 nF
VL
36
V
10
35
10
100 µF
33
IB
b
220 µF
11
a
13
open
VB
DC
S1
1000 µF
12
47 µF
62 kΩ
32
U4090B-P
34
IM
14
31
15
30
RAGA
IMP
16
29
17
28
18
27
30 kΩ
VLIDET
19
26
V
20
25
1 mF
21
24
RGSA
22
23
Figure 8-9.
Test Circuit for DC Characteristics and Line Detection
U4090B-P
4741C–CORD–11/05
4741C–CORD–11/05
1 µF
b
AC
25 kΩ
V
max
VMICO
RGT
3
2
1
42
43
150 nF
VL
44
220 nF
Mico
S1
1 µF
S2
68 nF
a
V mic
VCM
4
41
RGR
b
5
40
S1
25 kΩ
a
6
39
VM
600
RDC
22 µF
ZEAR
22 µF
7
38
10 µF
8
37
4.7 nF
V
9
36
VMP
10
35
33
32
220 µF
1000 µF
12
13
47 µF
14
Vmic
VL
17
28
18
27
Input resistance: Ri =
19
26
VMP
open
+ GT with S1b, S2 = closed, S3 = open
VL (at IMPSEL = open)
VL (at IMPSEL = low)
VL (at MUTX = open)
VL (at MUTX = low)
VL
VCM
-1
Open pins should be connected as shown in Figure 8-14
GTTX = 20 × log
Mute suppression: GTM = 20 × log
log
VL (S2 = open)
VL (S2 = closed)
50 k
20
25
VMP
∆GTI = GT (at IL = 100 mA) - GT (at IL = 14 mA), S3 = closed
IMP
16
29
Gain change with current: ∆GTI = GT (at IL = 100 mA) - GT (at IL = 14 mA)
Line loss compensation:
15
30
RAGA
Transmitting amplification GT = 20 × log
11
31
S3
62 kΩ
U4090B-P
34
IM
Common mode rejection ratio: CMRR = 20
IL
100 µF
VL, dt, n o
10Ω
open
open
21
24
1 µF
22
23
U4090B-P
Figure 8-10. Test Circuit for Transmission Amplifier
25
26
220 nF
S2
2
1
RGT
43
VM
3
42
1 kΩ
150 nF 1 µF
VL
44
220 nF
Mico
4
41
V
5
40
V DTMF
68 nF
RGR
10 µF
6
39
7
b
S1
600Ω
10 µF
38
ZEAR
a
9
36
4.7 nF
22 µF
AC
8
37
VZEAR, dr
V GEN
RDC
VM
V MP
32
V
11
V LR
1000 µF
220 µF
12
13
47 µF
62 k
14
31
S3
15
30
RAGA
I MP
16
29
17
28
18
27
b) RA2: ∆GR = 20 × log (VLR/VZEAR) dB + GR, MUTR = VMP
a) RECATT: ∆GR = 20 × log (VLR/VZEAR) dB +GR, MUTR = open
Mute suppression:
AC-impedance: (VLR/(VGEN - VLR)) × ZL
DTMF-control signal: GRM = 20 × log (VZEAR/VDTMF) dB (S1 =a, S2 = closed)
Receive amplification: GR = 20 × log ( VZEAR/VLR) dB (S1 = b, S2 open)
Receiving noise: S1a
Line loss compensation: ∆GRI = GR (at IL = 100 mA) - GR (at IL = 14 mA), S3 = closed
IL
33
U4090B-P
34
IM
Open pins should be connected as shown in Figure 8-14
c) DT MF operation: ∆GR = 20 × log VLR/VZEAR) dB + GR, MUTX = VMP
10
10
35
100 µF
open
19
26
V MP
V MP
20
25
open
1 µF
open
21
24
22
23
Figure 8-11. Test Circuit for Receiving Amplifier
U4090B-P
4741C–CORD–11/05
4741C–CORD–11/05
220 nF
Mico
S1
V MIC
3
42
4
41
68 nF
RGR
VL
5
40
V
6
39
RDC
RSAO
VSAO
2
Open pins should be connected as shown in Figure 8-14
Attenuation of transmit gain: S1 = closed
Output power: PSA =
10 µF
ZEAR
4.7 nF
7
38
10 µF
Gain from SAI to SAO: 20 × log (VSAO/VSAI) dB
Input impedance: (VZIN/(VSAO - VZIN)) × RIN
2
1
RGT
43
1 µF
8
37
600Ω
22 µF
10Ω
9
36
34
33
32
11
IL
50Ω
47 µF
13
V
1000 µF
12
U4090B-P
220 µF
10
35
62 kΩ
15
30
I MP
10 µF
n SA
VZIN, S4 = open
VSAO, S4 = closed
47 µF
14
31
10 µF
16
29
17
28
I INLDR
18
27
I INLDT
off
V LIDET
19
26
220 nF
V
20
25
S4
VATAFS
44
150 nF
VM
30 kΩ
1 µF
21
24
20
kΩ
V
22
23
RGSA
V SAI
U4090B-P
Figure 8-12. Test Circuit for Speaker Amplifier
27
28
V GEN3
S3
220 nF
2
1
RGT
43
AC
3
42
50 kΩ
150 nF
VL
44
220 nF
Mico
VM
1 kΩ
1 µF
4
41
V
68 nF
RGR
V DTMF
5
40
6
39
RDC
7
38
10 µF
VM
10 µF
ZEAR
4.7 nF
8
37
9
36
IL
10Ω
10
35
220 µF
100 µF
33
32
V
11
13
47 µF
dD
VL 50 kΩ: S3 = open
VL: S3 = closed
1000 µF
12
U4090B-P
34
IM
62 kΩ
14
31
15
30
17
28
18
27
19
26
20
25
Open pins should be connected as shown in Figure 8-14
Input resistance: (VL50K/(VL - VL50k)) × 50 kΩ
DTMF-amplifier: 20log (VL/VDTMF) dB
I MP
16
29
V MP
open
21
24
1 µF
22
23
Figure 8-13. Test Circuit for DTMF Amplifier
U4090B-P
4741C–CORD–11/05
4741C–CORD–11/05
43
2
44
1
RRING =
IRING
VRING
3
42
4
41
68 nF
5
40
6
39
RDC
7
38
IL
10 µF
8
37
4.7 nF
9
36
Open pins should be connected as shown in Figure 8-14
(VMPON) and back again (VMPOFF) (S5, S3 = closed)
10
35
10Ω
33
32
11
V SAO
47 µF
220 µF
50Ω
I MP
13
1000 µF
12
U4090B-P
34
100 µF
Vring
(S1 = closed )
Iring
5) Ring detector enable: detecting VRFDO, when driving VMP from 0.7V to 3.3V
RRINGSP =
(S 3 = closed)
4) Input impedance in speech mode (IL > 15 mA):
3) Input impedance:
and back again (VRINGOFF) (S2 = closed)
PSA =
Vsao 2
(S 4 closed)
RSAO
2) Threshold of ringing frequency detector:
detecting VRFDO, when driving VRING from 2V to 22V (VRINGON)
1) Max. output power:
VMP
2.2 mH
ramp
S5
47 µF
14
31
62 kΩ
15
30
V
18
27
V
19
26
I RING
20V
1.5V
V RING
V RING
680 kΩ
17
28
SD103A
BC556
68 nF
16
29
DC
S1
VSAI
ramp
S2
V RFDO
20
25
100 nF
1 kHz
1.8 Vpp
S3
DC
I RING
21
24
22
23
DC
20.6V
S4
1 µF
RGSA
U4090B-P
Figure 8-14. Test Circuit for Ringing Power Converter
29
30
2
1
RGT
43
44
68 nF
V pd
4
41
5
40
I pd
V MP
10 µF
open
7
6
10 µF
RDC
38
39
ZEAR
8
37
Open pins should be connected as shown in Figure 8-14
3
42
RGR
VM
IL
9
4.7 nF
10Ω
36
I MUTR
V
10
35
34
33
IM
32
VL
11
1000 µF
220 µF
12
13
14
31
62 kΩ
47 µF
U4090B-P
100 µF
V MP
15
30
I MP
16
29
17
28
18
27
19
26
V MP
I IMPSEL
20
25
I MUTX
RGSA
21
24
V MP
22
23
1 µF
Figure 8-15. Test Circuit for Input Characteristics of I/O Ports
U4090B-P
4741C–CORD–11/05
4741C–CORD–11/05
VM
C 20
R 16
C 19
R 17
speaker
Loud-
MICO
RECO
C 22
DTMF
Generator
R 19
R 20
R 27
R 28
R 14
C 14
C 15
C 16
R 31
C 17
C 18
C 21
Microphone
R 15
M
25
35
33
36
8
31
7
U4090B-P
21
R3
38
10
R8
R4
C4
11
14
37
C5
34
13
24
22
12
26
29
30
27
28
42
Earpeace
40
R 11
41
R9
R 10
C 13
VM
C 12
VM
39
C 11
STN 2
ST
(Option)
43
VL
18
19
15
16
17
20
32
R6
C8
to µC
C 10
C6
6
R 12
44
12V
R2
2
R 13
3
to ST
C2
9
23
1
C1
4
5
R1
C3
R7
VM
L1
Q9
C9
R5
Micro
controller
hook switch
Ring
V MP
C7
Tip
U4090B-P
Figure 8-16. Application Circuit for Loud-hearing
31
32
DTMF
HF-Mic
VM
R 17
Loud
speaker
LOGTX
RECO
R 22
R 23
C 23
R 25
R 24
R 16
C 26
C 27
R 29
R 30
C 24
C 25
VM
R 15
R 14
C 14
C 15
C 16
R 18
C 17
C 18
C 21
Microphone
R 26
25
33
8
21
31
7
R3
10
R8
R4
11
37
14
43
C5
13
C6
24
22
12
26
29
30
27
28
42
2
R 13
35
36
Earpiece
40
R 11
41
R9
R 10
C 13
VM
C 12
VM
39
U4090B-P
C 11
ST
38
(Option)
STN 2
LOGTX
VL
C 10
18
19
15
16
17
20
32
6
9
R 12
44
R2
C4
4
3
12V
C3
34
23
1
to ST
C2
5
R1
C1
R 21
R7
VM
BC177
VB
R6
C8
to µC
L1
Q1
Microcontroller
C9
R5
hook switch
V MP
C7
Ring
Tip
Figure 8-17. Application for Hands-free Operation
U4090B-P
4741C–CORD–11/05
U4090B-P
Table 8-1.
Typical Values of External Components (Figure 8-16 on page 31 and Figure 8-17 on page 32)
Name
Value
Name
Value
Name
Value
Name
Value
C1
100 nF
C16
47 µF
R3
> 68 kΩ
R18
30 kΩ
C2
4.7 nF
C17
10 µF
R4
10 kΩ
R19
6.8 kΩ
C3
10 µF
C18
10 µF
R5
1.5 kΩ
R20
6.8 kΩ
C4
220 µF
C19
68 nF
R6
62 kΩ
R21
15 kΩ
C5
47 µF
C20
68 nF
R7
680 kΩ
R22
330 kΩ
C6
470 µF
C21
1 µF
R8
22 kΩ
R23
220 kΩ
C7
820 nF
C22
100 nF
R9
330 kΩ
R24
68 kΩ
C8
100 µF
C23
6.8 nF
R10
3 kΩ
R25
2 kΩ
C9
100 nF
C24
10 nF
R11
62 kΩ
R26
3.3 kΩ
C10
150 nF
C25
100 nF
R12
30 kΩ
R27
18 kΩ
C11
86 nF
C26
470 nF
R13
62 kΩ
R28
2 kΩ
C12
33 nF
C27
33 nF
R14
120 kΩ
R29
1 kΩ
C13
10 µF
L1
2.2 mH
R15
47 kΩ
R30
12 kΩ
C14
100 nF
R1
27 kΩ
R16
1 kΩ
R31
56 kΩ
C15
1 µF
R2
20 kΩ
R17
1.2 kΩ
33
4741C–CORD–11/05
9. Ordering Information
Extended Type Number
Package
Remarks
U4090B-PFNY
SSO44
Pb-free
U4090B-PFNG3Y
SSO44
Taped and reeled, Pb-free
T4090B-PC
Die
Chip on foil
10. Package Information
9.15
8.65
Package SSO44
Dimensions in mm
18.05
17.80
7.50
7.30
2.35
0.3
0.25
0.10
0.8
16.8
44
0.25
10.50
10.20
23
technical drawings
according to DIN
specifications
1
34
22
U4090B-P
4741C–CORD–11/05
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