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

Versatile speech/dialler/ringer with music-on-hold

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 kΩ) for

dynamic, magnetic, or piezoelectric microphones

• Asymmetrical high-impedance input (32 kΩ) 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

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

HOLD

LOGIC

MUTE

RECEIVE

SECTION

PULSE

DIALLER

SPEECH

(2)

(24)

(19)

(21)

(17)

(15)

(22)

(31)

(32)

(44)

(34)

(36)

(40) 2

AGCIRMUTEMOH/DMODP/FLKT/EARTH

HF TONE VOL1 VOL2

(16)

HOLD

(33)

REG

(43)

STAB

(35)

SLPE

(1)

DTMF

(42)

MIC+

(41)

MIC−

(11, 18

and 23)

TRANSMIT

SECTION

SUPPLY

GAR

(37) 41

GAS1

(38) 42

GAS2

(39) 1

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

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

23 11, 18, 23 negative line terminal TONE 24 19 tone generator output V

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

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

DESCRIPTION

SOT270-1 SOT307-2

Fig.2 Pin configuration (SOT270-1).

handbook, halfpage

TEA1069N

MBH196

1 2

41 3 4 5 6 7 8 9

10 11 12 13 14 15 16 17 18 19 20

2221

GAS2

GAR

GAS1

MIC−

MIC+

SLPE

STAB

AGC

REG

DTMF

KT/EARTH

MUTE

CSI

DIODE

XTAL1

ROW5

XTAL2

ROW4

RESET

ROW3

CE/FDI

ROW2

COL6

ROW1

COL5

COL4

MOH/DMO

COL3

VOL1

COL2

COL1

TONE

DP/FL

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

DTMF

KT/EARTH

CSI

XTAL1

XTAL2 RESET CE/FDI

COL6 COL5 COL4

COL3

COL2

COL1

DP/FL

HOLD

VOL2

TONE

VOL1

MOH/DMO

MUTE DIODE

REG

ROW3 ROW2

ROW4

ROW5

ROW1

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

. 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

(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

peripheral

circuits

0.5 mA

line

exch

line

SLPE

+ 0.5 mA

SLPE

C3 R5 R9

TEA1069 TEA1069A

Thus, the regulated voltage on the line terminal (VLN) can be calculated as:

, where

ref

is the internally generated temperature compensated reference voltage of 3.7 V and R9 is an external resistor connected between SLPE and V

The circuit has an internal current stabilizer operating at a level determined by resistor R5 connected between STAB and V

In normal use the value of R5 would be 3.6 kΩ and the value of R9 would be 20 Ω.

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

refISLPE

R9×+=

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 kΩ.

handbook, halfpage

REG

SLPE

MGD489

ref

R9 20 Ω

4.7 µF C1100 µF

VCC> 2.2 V; I

line

= 15 mA at VLN= 4 V; R1 = 620 Ω; R9 = 20 Ω. (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

0.8

1.6

MSA504

VCC(V)

(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 MIC− AND GAIN PINS GAS1 AND GAS2 The circuit has symmetrical microphone inputs. Its input impedance is 64 kΩ (2 × 32 kΩ) and its voltage gain is typically

52 dB (when R7 = 68 kΩ). 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

(1)

36 (32)

3 (41)

4 (42)

23 (18)

4 (42)

3 (41)

4 (42)

3 (41)

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.

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 kΩ).

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.

, full pagewidth

(1) (2)

1 (39)

23 (18)

1 (39)

23 (18)

1 (39)

23 (18)

QR QR

MBH199

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 kΩ) 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).

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 Ω/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

exch

) and exchange feeding bridge resistance (R

exch

); R9 = 20 Ω

exch

(V)

R6 (kΩ)

exch

= 400 Ω R

exch

= 600 Ω R

exch

= 800 Ω R

exch

= 1000 Ω

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

5.8

∆G

(dB)

140120100806040200

78.7 kΩ

110 kΩ 140 kΩ

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×()

-----------------------------

×=

bal

line

×=

follows: suppose Z

line

= 210 Ω + (1265 Ω//140 nF) representing a 5 km line of 0.5 mm diameter, copper, twisted-pair cable matched to 600 Ω (176 Ω/km; 38 nF/km). When k = 0.64 then R8 = 390 Ω; Z

bal

= 130 Ω + (820 Ω//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

SLPE

line

bal

R1 R2

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

SLPE

line

bal

Dialler and ringer part

UPPLY VOLTAGE: PINS VDDAND V

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.

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).

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

, preferably via a resistor of 100 kΩ to 1 MΩ, 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).

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.

+ 30 hidden pages