Philips TEA1069N-C1, TEA1069H-C1, TEA1069AH-C1 Datasheet

DATA SH EET
Product specification Supersedes data of 1996 Dec 10 File under Integrated Circuits, IC03
1998 Jan 08
INTEGRATED CIRCUITS
TEA1069; TEA1069A
1998 Jan 08 2
Philips Semiconductors Product specification
Versatile speech/dialler/ringer with music-on-hold
TEA1069; TEA1069A
FEATURES Speech part
Voltage regulator with adjustable static resistance
Low DC line voltage; operates down to 1.6 V
(excluding polarity guard)
Supply for dialler part and peripherals (not stabilized)
Symmetrical high-impedance inputs (64 k) for
dynamic, magnetic, or piezoelectric microphones
Asymmetrical high-impedance input (32 k) for electret microphones
Asymmetrical earpiece output for dynamic, magnetic, or piezoelectric earpieces
Internal mute to disable speech during dialling
Confidence tone during DTMF dialling
Line-loss compensation (line-current dependent) for
microphone and earpiece amplifiers
Gain-control curve adaptable to the exchange supply.
Dialler part
Pulse/DTMF and mixed mode dialling
Last Number Redial (LNR), up to 32 digits
13 repertory numbers (3 direct and 10 indirect) or
10 repertory numbers (10 direct), up to 32 digits, with a maximum of 224 digits in total
Repertory and redial memory integrity check (memory contents check)
Notepad memory function
Flash and earth register recall
Dial mode output
Access pause generation and termination
Function keys for: store, memory recall, register recall,
LNR, pause, hold, mute, hook
Keytone generation
Hands-free control
Volume control in hands-free mode (VOL+/VOL−)
Hold function
Mute function
Music-on-hold
Diode options:
– DTMF tone burst/pause time – make/break ratio – access pause time
– pulse or DTMF mode selection – register recall (earth and flash times) – keyboard layout selection – selection for german requirements – hold/mute mode selection.
Ringer part
Ringer input frequency discrimination
Ringer melody generation (3-tone)
Ringer melody selection/volume control via keyboard
Diode option: ringer frequency selection.
GENERAL DESCRIPTION
The TEA1069 and TEA1069A contain all the functions needed to build a highly featured, high-performance fully electronic telephone set.
The device incorporates a speech/transmission part, a dialler part and a ringer part. By offering a wide range of possible adaptations for each part, the TEA1069 and TEA1069A application can be easily adapted to meet different requirements.
The TEA1069A offers some different timings and diode options compared to the TEA1069.
Where pin numbers are mentioned in this data sheet we refer to the TEA1069N, unless otherwise indicated.
Speech part
The speech/transmission part performs all speech and line interface functions required in electronic sets. It operates at line voltages down to 1.6 V DC to facilitate the use of more telephones connected in parallel.
Dialler part
The dialler part offers a 32-digit Last Number Redial (LNR) and 13 memories. Hands-free control is included allowing the TEA1069 and TEA1069A to be used not only in basic telephones, but also in feature phones offering hands-free dialling via the TEA1083 call-progress monitor IC and/or full hands-free operation via the TEA1093 hands-free IC. The hold function allows the user to suspend the conversation and resume the call either on the same phone or on a parallel phone. Additionally through the music-on-hold function a melody is transmitted while the set is put on hold. The keytones provide in a buzzer an audible feedback of a valid key pressed.
1998 Jan 08 3
Philips Semiconductors Product specification
Versatile speech/dialler/ringer with music-on-hold
TEA1069; TEA1069A
Ringer part
The ringer part offers a discriminator input which enables the tone output as soon as a valid ring frequency is detected. It offers a melody based on 3 tones with programmable melody and volume via keyboard.
ORDERING INFORMATION
TYPE
NUMBER
PACKAGE
NAME DESCRIPTION VERSION
TEA1069N SDIP42 plastic shrink dual in-line package; 42 leads (600 mil) SOT270-1 TEA1069H QFP44 plastic quad flat package; 44 leads (lead length 1.3 mm);
body 10 × 10 × 1.75 mm
SOT307-2
TEA1069AH QFP44 plastic quad flat package; 44 leads (lead length 1.3 mm);
body 10 × 10 × 1.75 mm
SOT307-2
1998 Jan 08 4
Philips Semiconductors Product specification
Versatile speech/dialler/ringer with music-on-hold
TEA1069; TEA1069A
BLOCK DIAGRAM
handbook, full pagewidth
MBH195
34 (30)
KEYBOARD
DETECTOR
RECALL
KEY-
TONE
TONE
GENERATOR
TIMING/
CONTROL
DETECTOR/
GENERATOR
RINGER
33 (29)
DIODE
ROW5
32 (28)
ROW4
31 (27)
ROW3
30 (26)
ROW2
29 (25)
ROW1
14 (8)
COL6
15 (9)
COL5
16 (10)
COL4
17 (12)
COL3
18 (13)
COL2
19 (14)
COL1
9 (3)
CSI
10 (4)
XTAL1
11 (5)
XTAL2
12 (6)
RESET
13 (7)
25 (20)
CE/FDI
V
DD
HOLD
LOGIC
MUTE
RECEIVE
SECTION
PULSE
DIALLER
SPEECH
8
(2)
(24)
28
(19)
24
(21)
26
(17)
22
20
(15)
27
(22)
35
(31)
36
(32)
6
(44)
38
(34)
40
(36)
(40) 2
AGCIRMUTEMOH/DMODP/FLKT/EARTH
HF TONE VOL1 VOL2
(16)
21
HOLD
(33)
37
REG
(43)
5
STAB
(35)
39
SLPE
(1)
7
DTMF
(42)
4
MIC+
(41)
3
MIC
(11, 18
and 23)
23
V
EE
V
CC
LN
TRANSMIT
SECTION
dB
SUPPLY
GAR
(37) 41
GAS1
(38) 42
GAS2
(39) 1
QR
TEA1069
TEA1069A
Fig.1 Block diagram.
Pin numbers in parenthesis refer to the TEA1069H and TEA1069AH.
1998 Jan 08 5
Philips Semiconductors Product specification
Versatile speech/dialler/ringer with music-on-hold
TEA1069; TEA1069A
PINNING
SYMBOL
PIN
DESCRIPTION
SOT270-1 SOT307-2
QR 1 39 receiving amplifier output GAR 2 40 gain adjustment; receiving amplifier MIC 3 41 inverting microphone input MIC+ 4 42 non-inverting microphone input STAB 5 43 current stabilizer IR 6 44 receiving amplifier input DTMF 7 1 dual-tone multi-frequency input KT/EARTH 8 2 keytone/earth recall output CSI 9 3 cradle switch input XTAL1 10 4 oscillator input XTAL2 11 5 oscillator output RESET 12 6 reset input CE/FDI 13 7 chip enable/frequency discrimination input COL6 14 8 keyboard column input 6 COL5 15 9 keyboard column input 5 COL4 16 10 keyboard column input 4 COL3 17 12 keyboard column input 3 COL2 18 13 keyboard column input 2 COL1 19 14 keyboard column input 1 DP/FL 20 15 dial pulse/flash output HOLD 21 16 hold control input VOL2 22 17 volume 2 output V
EE
23 11, 18, 23 negative line terminal TONE 24 19 tone generator output V
DD
25 20 dialler/ringer part supply voltage VOL1 26 21 volume 1 output MOH/DMO 27 22 music on hold/dial mode output HF 28 24 hands-free control output ROW1 29 25 keyboard row input/output 1 ROW2 30 26 keyboard row input/output 2 ROW3 31 27 keyboard row input/output 3 ROW4 32 28 keyboard row input/output 4 ROW5 33 29 keyboard row input/output 5 DIODE 34 30 diode option output MUTE 35 31 mute output, active LOW V
CC
36 32 speech part supply voltage REG 37 33 (DC) line voltage regulator decoupling AGC 38 34 automatic gain control input
1998 Jan 08 6
Philips Semiconductors Product specification
Versatile speech/dialler/ringer with music-on-hold
TEA1069; TEA1069A
SLPE 39 35 slope (DC resistance) adjustment LN 40 36 positive line terminal GAS1 41 37 gain adjustment; transmitting amplifier GAS2 42 38 gain adjustment; transmitting amplifier
SYMBOL
PIN
DESCRIPTION
SOT270-1 SOT307-2
Fig.2 Pin configuration (SOT270-1).
handbook, halfpage
TEA1069N
MBH196
1 2
42
41 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
2221
QR
GAS2
GAR
GAS1
MIC
LN
MIC+
SLPE
STAB
AGC
IR
REG
DTMF
V
CC
KT/EARTH
MUTE
CSI
DIODE
XTAL1
ROW5
XTAL2
ROW4
RESET
ROW3
CE/FDI
ROW2
COL6
ROW1
COL5
HF
COL4
MOH/DMO
COL3
VOL1
COL2
V
DD
COL1
TONE
DP/FL
V
EE
HOLD
VOL2
1998 Jan 08 7
Philips Semiconductors Product specification
Versatile speech/dialler/ringer with music-on-hold
TEA1069; TEA1069A
Fig.3 Pin configuration (SOT307-2).
handbook, full pagewidth
TEA1069H
TEA1069AH
MBH784
1 2 3 4 5 6 7 8
9 10 11
33 32 31 30 29 28 27 26 25 24 23
12
13
14
15
16
17
18
19
20
21
22
44
43
42
41
40
39
38
37
36
35
34
DTMF
KT/EARTH
CSI
XTAL1
XTAL2 RESET CE/FDI
COL6 COL5 COL4
V
EE
COL3
COL2
COL1
DP/FL
HOLD
VOL2
V
EE
TONE
V
DD
VOL1
MOH/DMO
MUTE DIODE
V
CC
REG
ROW3 ROW2
ROW4
ROW5
V
EE
HF
ROW1
IR
STAB
MIC+
MIC
GARQRGAS2
GAS1LNSLPE
AGC
FUNCTIONAL DESCRIPTION Speech part
For numbering of components refer to Figs 28 and 29.
SUPPLIES VCC, LN, SLPE, REG AND STAB Power for the IC and its peripheral circuits is usually
obtained from the telephone line (see Fig.4). The circuit creates a stabilized voltage (V
ref
= 3.7 V) between LN and SLPE. This reference voltage is temperature compensated and can be adjusted by means of an external resistor RVA. It can be increased by connecting an RVA resistor (R60) between REG and SLPE or decreased by connecting an RVA resistor (R61) between REG and LN. This internal voltage reference is decoupled by capacitor C3 between REG and VEE.
This decoupling capacitor realises the set impedance conversion from its DC value to its AC value in the audio frequency range.
The internal transmission part of the circuitry (including the earpiece amplifier) is supplied from V
CC
. This voltage supply is derived from the LN voltage via a dropping resistor (R1) and must be decoupled by a capacitor (C1) between VCC and VEE. This supply point may also be used to supply the dialler/ringer (VDD) part or external circuit e.g. electret microphone.
The DC current flowing into the set is determined by the exchange supply voltage V
exch
, the feeding bridge
resistance R
exch
and the DC resistance of the telephone
line R
line
. When the line current (I
line
) is more than 0.5 mA greater than the sum of the IC supply current (ICC) and the current drawn by the peripheral circuitry connected to V
CC
(Ip), the excess current is shunted to SLPE via LN.
1998 Jan 08 8
Philips Semiconductors Product specification
Versatile speech/dialler/ringer with music-on-hold
TEA1069; TEA1069A
Fig.4 Supply arrangement.
handbook, full pagewidth
MBH197
SLPESTABREG
LN
AC
DC
peripheral
circuits
C1
0.5 mA
R
line
R
exch
V
exch
I
line
I
p
R1
I
CC
V
CC
V
EE
I
SLPE
+ 0.5 mA
I
SLPE
C3 R5 R9
TEA1069 TEA1069A
Thus, the regulated voltage on the line terminal (VLN) can be calculated as:
, where
V
ref
is the internally generated temperature compensated reference voltage of 3.7 V and R9 is an external resistor connected between SLPE and V
EE
.
The circuit has an internal current stabilizer operating at a level determined by resistor R5 connected between STAB and V
EE
.
In normal use the value of R5 would be 3.6 k and the value of R9 would be 20 .
Changing the value of R5 or R9 will affect microphone gain, DTMF gain, gain control characteristics, sidetone level, maximum output swing on LN and the DC characteristics (especially at low line current).
At line currents below 9 mA the internal reference voltage is automatically adjusted to a lower value (typically 1.6 V
V
LN
V
refISLPE
R9×+=
I
SLPEIlineICCIp
0.5 103–A×++


=
at 1 mA). This means that more sets can be operated in parallel with DC line voltages (excluding the polarity guard) down to an absolute minimum voltage of 1.6 V. At line currents below 9 mA the circuit has limited sending and receiving levels.
Under normal conditions, when I
SLPE
>> ICC+ 0.5 mA + Ip, the static behaviour of the circuit is that of a 3.7 V regulator diode (V
ref
) with an internal resistance equal to that of R9. In the audio frequency range the dynamic impedance is largely determined by R1. Figure 5 shows the equivalent impedance of the circuit.
Current (Ip) available from VCC for the dialler part and peripheral circuits depends on the external components used. Figure 6 shows this current for VCC> 2.2 V. When MUTE is HIGH i.e. when the receiving amplifier (supplied from VCC) is driven, the available current is further reduced. Current availability can be increased by connecting the supply IC TEA1081 in parallel with R1, or by increasing the DC line voltage by means of an external resistor (RVA= R60) connected between REG and SLPE.
1998 Jan 08 9
Philips Semiconductors Product specification
Versatile speech/dialler/ringer with music-on-hold
TEA1069; TEA1069A
Fig.5 Equivalent impedance circuit.
Leq=C3×R9 × Rp. Rp= 16.2 k.
handbook, halfpage
REG
SLPE
V
EE
V
CC
LN
MGD489
L
eq
R
p
R1
V
ref
R9 20
C3
4.7 µF C1100 µF
VCC> 2.2 V; I
line
= 15 mA at VLN= 4 V; R1 = 620 ; R9 = 20 . (1) Ip= 2.1 mA. The curve is valid when the receiving amplifier is not driven or when MUTE = LOW. (2) Ip= 1.7 mA. The curve is valid when MUTE = HIGH and the receiving amplifier is driven; V
o(rms)
= 150 mV, RL= 150 Ω.
Fig.6 Typical current IP available from VCC for peripheral circuitry.
handbook, halfpage
012 4
2.4
0
0.8
1.6
MSA504
3
VCC(V)
I
p
(mA)
(1)
(2)
1998 Jan 08 10
Philips Semiconductors Product specification
Versatile speech/dialler/ringer with music-on-hold
TEA1069; TEA1069A
MICROPHONE INPUTS MIC+ AND MICAND GAIN PINS GAS1 AND GAS2 The circuit has symmetrical microphone inputs. Its input impedance is 64 k (2 × 32 k) and its voltage gain is typically
52 dB (when R7 = 68 k). Dynamic, magnetic, piezoelectric or electret (with built-in FET source followers) microphones can be used. Microphone arrangements are illustrated in Fig.7.
Fig.7 Alternative microphone arrangements.
Pin numbers in parenthesis refer to the TEA1069H and TEA1069AH. (1) Resistor may be connected to reduce the terminating impedance.
a. Magnetic or dynamic
microphone.
b. Electret microphone.
c. Piezoelectric microphone.
handbook, full pagewidth
MBH198
V
EE
V
CC
(1)
36 (32)
3 (41)
4 (42)
23 (18)
4 (42)
3 (41)
4 (42)
3 (41)
MIC+
MIC
MIC
MIC+
MIC+
MIC
The gain of the microphone amplifier can be adjusted between 44 dB and 52 dB to suit the sensitivity of the transducer in use. The gain is proportional to the value of R7 which is connected between GAS1 and GAS2. Stability is ensured by two external capacitors, C6 connected between GAS1 and SLPE and C17 connected between GAS1 and VEE. The value of C6 is 100 pF but this may be increased to obtain a first-order low-pass filter. The value of C17 is 10 times the value of C6. The cut-off frequency corresponds to the time constant R7 × C6.
R
ECEIVING AMPLIFIER IR, QR AND GAR
The receiving amplifier has one input (IR) and one output (QR). Earpiece arrangements are illustrated in Fig.8. The IR to QR gain is typically 31 dB (when R4 = 100 k).
It can be adjusted between 20 and 31 dB to match the sensitivity of the transducer in use. The gain is set with the value of R4 which is connected between GAR and QR. The overall receive gain, between LN and QR, is calculated by subtracting the anti-sidetone network attenuation (32 dB) from the amplifier gain. Two external capacitors, C4 and C7, ensure stability. C4 is normally 100 pF and C7 is 10 times the value of C4. The value of C4 may be increased to obtain a first-order low-pass filter. The cut-off frequency will depend on the time constant R4 × C4.
The output voltage of the receiving amplifier is specified for continuous-wave drive. The maximum output voltage will be higher under speech conditions where the peak to RMS ratio is higher.
1998 Jan 08 11
Philips Semiconductors Product specification
Versatile speech/dialler/ringer with music-on-hold
TEA1069; TEA1069A
Fig.8 Alternative receiver arrangements.
Pin numbers in parenthesis refer to the TEA1069H and TEA1069AH. (1) Resistor may be connected to prevent distortion (inductive load). (2) Resistor is required to increase the phase margin (capacitive load).
a. Dynamic earpiece. b. Magnetic earpiece. c. Piezoelectric earpiece.
k
, full pagewidth
(1) (2)
QR
1 (39)
23 (18)
1 (39)
23 (18)
1 (39)
23 (18)
QR QR
MBH199
V
EE
V
EE
V
EE
DUAL TONE MULTI-FREQUENCY INPUT DTMF When the DTMF input is enabled (MUTE is LOW) dialling
tones may be sent on to the line. The voltage gain from DTMF to LN is typically 25.5 dB (when R7 = 68 k) and varies with R7 in the same way as the microphone gain. The tones can be heard in the earpiece at a low level (confidence tone).
A
UTOMATIC GAIN CONTROL INPUT AGC
Automatic line loss compensation is achieved by connecting a resistor (R6) between AGC and VEE. The automatic gain control varies the gain of the
microphone amplifier and the receiving amplifier in accordance with the DC line current.
The control range is 5.8 dB which corresponds to a line length of 5 km for a 0.5 mm diameter twisted-pair copper cable with a DC resistance of 176 /km and average attenuation of 1.2 dB/km. Resistor R6 should be chosen in accordance with the exchange supply voltage and its feeding bridge resistance (see Fig.9 and Table 1). The ratio of start and stop currents of the AGC curve is independent of the value of R6. If no automatic line-loss compensation is required the AGC pin may be left open-circuit. The amplifiers, in this condition, will give their maximum specified gain.
1998 Jan 08 12
Philips Semiconductors Product specification
Versatile speech/dialler/ringer with music-on-hold
TEA1069; TEA1069A
Table 1 Values of resistor R6 for optimum line-loss compensation at various values of exchange supply voltage
(V
exch
) and exchange feeding bridge resistance (R
exch
); R9 = 20
V
exch
(V)
R6 (k)
R
exch
= 400 R
exch
= 600 R
exch
= 800 R
exch
= 1000
36 100 78.7 −− 48 140 110 93.1 82 60 −−120 102
Fig.9 Variation of gain as function of line current with R6 as parameter.
handbook, full pagewidth
MGD490
6
5.8
4
2
0
G
v
(dB)
140120100806040200
78.7 k
110 k 140 k
R6 =
I (mA)
line
1998 Jan 08 13
Philips Semiconductors Product specification
Versatile speech/dialler/ringer with music-on-hold
TEA1069; TEA1069A
SIDETONE SUPPRESSION Suppression of the transmitted signal in the earpiece is
obtained by the anti-sidetone network comprising R1//Z
line
,
R2, R3, R8, R9 and Z
bal
(see Fig.10). The maximum compensation is obtained when the following conditions are fulfilled:
(1)
(2)
(3)
The scale factor k is chosen to meet the compatibility with a standard capacitor from the E6 or E12 series for Z
line
.
In practice, Z
line
varies considerably with the line type and
length. Therefore, the value chosen for Z
bal
should be for an average line length thus giving optimum setting for short or long lines.
Example: the balance impedance Z
bal
at which the
optimum suppression is present can be calculated as
R9 R2× R1 R3 R8+()×=
kR3
R8 R9+() R2 R9×()
-----------------------------
×=
Z
bal
kZ
line
×=
follows: suppose Z
line
= 210 + (1265 //140 nF) representing a 5 km line of 0.5 mm diameter, copper, twisted-pair cable matched to 600 (176 /km; 38 nF/km). When k = 0.64 then R8 = 390 ; Z
bal
= 130 + (820 //220 nF).
The anti-sidetone network for the TEA1069 and TEA1069A shown in Fig.10 attenuates the signal received from the line by 32 dB before it enters the receiving amplifier. The attenuation is almost constant over the whole audio-frequency range. Figure 11 shows a conventional Wheatstone bridge anti-sidetone circuit that can be used as an alternative. Both bridge types can be used with either resistive or complex set impedances. More information on the balancing of anti-sidetone bridges can be found in our publication
“Applications Handbook for
Wired telecom systems, IC03b”
, order number
9397 750 00811.
Fig.10 Equivalent circuit of TEA1069 and TEA1069A anti-sidetone bridge.
handbook, full pagewidth
MSA500 - 1
IR
R3
R8
SLPE
R9
Z
line
V
EE
Z
bal
i
m
R
t
R1 R2
LN
1998 Jan 08 14
Philips Semiconductors Product specification
Versatile speech/dialler/ringer with music-on-hold
TEA1069; TEA1069A
Fig.11 Equivalent circuit of an anti-sidetone network in a Wheatstone bridge configuration.
handbook, full pagewidth
MSA501 - 1
IR
R8
SLPE
R9
R1
LN
Z
line
V
EE
Z
bal
R
A
i
m
R
t
Dialler and ringer part
S
UPPLY VOLTAGE: PINS VDDAND V
EE
The power supply must be maintained for data storage. The RAM retention voltage (standby supply voltage) may drop down to 1.0 V. Applying a large capacitor across the supply terminals can retain the memory if power connections are broken. The minimum operation voltage is
2.5 V. The internal power-on reset is enabled for a voltage below this minimum operation voltage.
O
SCILLATOR INPUT/OUTPUT: PINS XTAL1AND XTAL2
Time base for the TEA1069 and TEA1069A is a crystal-controlled on-chip oscillator which is completed by connecting a 3.579545 MHz crystal or ceramic resonator between XTAL1 and XTAL2. The oscillator starts when VDD reaches the operation voltage level and CE/FDI = HIGH. The following types of ceramic resonators are recommended:
Kyocera PBRC3.58ARPC10 (wired)
Kyocera KBR3.58MSATRPC10 (SMD)
Murata CSA3.58MG310VA (wired).
R
ESET INPUT: PIN RESET
Pin RESET is an input to the internal reset circuit. When RESET = HIGH, it can be used to initialize the TEA1069 and TEA1069A which is normally done by the CE/FDI input. The on-chip power-on reset generates a reset pulse if VDD drops below 2.5 V. In this event a proper start-up
occurs after the supply voltage rises above the minimum operation voltage level again. During and directly after reset pins 14 to 19, 21, 29 to 32, 34 and 35 are set HIGH; pins 8, 20, 22, 26 to 28 and 33 are set to LOW.
The RESET pin can be connected to V
EE
, preferably via a resistor of 100 kto 1 M, which will save leakage current. A capacitor connected to VDD can be used to extend the reset time, in case a longer reset is desirable.
To prevent the dialler from reacting on voltage disturbances on the telephone line a time-out is active. The dialler returns to standby state if the voltage on the line has disappeared for more than this reset-delay time (trd).
C
HIP ENABLE/FREQUENCY DISCRIMINATOR INPUT:
PIN CE/FDI
This active HIGH input is used to initialize part of the system, to select the on-line, standby, or ringer mode and to detect line power breaks. To keep the TEA1069 and TEA1069A in the on-line mode, CE/FDI has to be HIGH.
In the exchange, several AC signals can be superimposed on the DC signal, e.g. dialling tone, busy tone, disturbances (like line power breaks), and the ringer signal. The ringer signal is evaluated, and checked if its frequency is within the limits of the frequency interval as set by the diode option RFS. It is assumed that the ringer frequency at pin CE/FDI is the double of the frequency present on the telephone line.
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