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U4070B-FP [TEMIC]

Tone Ringer Interface; 音振铃接口
U4070B-FP
型号： U4070B-FP
厂家： TEMIC SEMICONDUCTORS    TEMIC SEMICONDUCTORS
描述：

Tone Ringer Interface
音振铃接口
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U4074B  
Tone Ringer Interface  
Description  
The U4074B is a monolithic integrated circuit that Ringing frequency detection takes place in the  
contains all integral components of a ringing circuit for microcomputer. The U4074B is responsible for the  
telephone sets used in conjunction with a microcomputer. interface to the line, driver stages for the piezoelectric  
The combination of a microcomputer and the U4074B sound transducer, volume adjustment, amplitude  
permits flexible programming of the ringing sequence detection, voltage supply for the microcomputer and  
(melody), tone and volume control.  
other auxiliary functions.  
Features  
Suitable for specifications FTZ 1TR2 and ETR 2  
CMOS-compatible microcomputer interface  
2-bit log. volume adjustment  
Rectifier bridge  
High-voltage bipolar technology, 30 V  
Z-diode  
Amplitude detection  
Benefits  
Supply voltage for microcomputer 3.5 @ 1.5 mA  
DC operation possible  
C controlled melody and volume  
Low number of external components  
Bridge push-pull output stage  
47 F  
22 F  
130 k  
10 (12)  
V
V
3(4)  
2(3)  
B
DD  
4(5)  
2f  
TH  
On/Off  
+V  
B
V
Ref  
Control  
0.8 F  
a
a
(1)1  
12(14)  
O
2
2.2 k  
Ringing signal  
2f  
b
b
(16)14  
+V  
B
Decoder and  
DA converter  
PIEZO  
Transducer  
11(13)  
O
1
5(6)  
V
9(11)  
GND  
A1  
(15)13  
Mel  
6(7) (9)7  
A0  
8(10)  
DC  
93 7793 e  
Volume  
Figure 1. Block diagram and application circuit (pin connections for SO16 in brackets)  
TELEFUNKEN Semiconductors  
1 (6)  
Rev. A1, 06-May-96  
Preliminary Information  
U4074B  
Pin Configuration  
16  
15  
14  
13  
12  
11  
10  
9
1
a
1
2
14  
13  
12  
11  
a
b
b
2
GND  
NC  
V
B
GND  
O2  
O1  
V
3
4
5
6
7
8
B
O2  
O1  
3
4
5
6
7
TH  
2f  
TH  
2f  
V
DD  
A1  
V
10  
9
DD  
V
A1  
A0  
DC  
V
A0  
DC  
V
DC  
Mel  
8
Mel  
V
DC  
NC  
94 7904 e  
94 7903 e  
via a 0.8 F decoupling capacitor connected in series with  
a 2.2 kΩ. resistor  
Pin  
1, 14  
(1,16)  
2 (3)  
3 (4)  
Symbol  
a , b  
Function  
AC ringing signal input  
3. The circuit possesses the following overload resis-  
tance at terminals a and b.The circuit can withstand  
a voltage of 110 V with a frequency of 50 Hz at  
terminals a and b for a maximum of 15 s.  
V
B
Output to charging capacitor  
Comparator threshold adjust-  
ment input  
TH  
4 (5)  
5, 6  
(6, 7)  
2f  
Output for frequency detection  
4. Testing the circuit with the configuration shown in  
figure 2 does not destroy the circuit under the  
following conditions.  
A1, A0 Digital volume adjustment in-  
put  
7 (9)  
8, 9  
(10, 11)  
10 (12)  
11, 12  
Mel  
Input for melody signal  
DC supply diode connections  
Charging voltage of surge capacitance: V = 2 kV  
Pulse shape: 10/700 s  
Pulse sequence: 30 s  
Number of surges: 10  
Polarity change after 5 surges  
cs  
V
DC  
V
DD  
Microcomputer supply voltage  
Outputs to the transducer  
O , O  
1 2  
(13, 14)  
13 (15)  
(2, 8)  
See figure 2.  
GND  
NC  
Ground  
Not connected  
Smoothing Capacitors, Pin 2, 10  
After rectification of the ac ringing voltage via the  
integrated rectifier bridge, the pulsating DC voltage is  
smoothed by the external capacitor (22 F to 47 F) at  
Pin 2 (3). The charging voltage is restricted to a  
Pin Description  
maximum of 30 V by an integrated Z-diode. A 47  
external capacitor of will smooth the regulated supply,  
V
, at pin 10 (12).  
DD  
F
Power supply a and b , Pin 1, 14  
An ac ringing voltage is supplied to the inputs a and b  
2 (6)  
TELEFUNKEN Semiconductors  
Rev. A1, 06-May-96  
Preliminary Information  
U4074B  
25  
15  
a
10 F  
Tone ringing  
Figure 1  
2 kV  
110  
0.22 F  
b
93 7575 e  
Figure 2. Test circuit  
Outputs O1, O2 Pin 11, 12  
Supply Voltage VDD, Pin 10 (12)  
The bridge push-pull outputs are used for direct  
connection of a piezo electric sound transducer with a  
typical value of 80 nF. The output stage transistors can  
process up to 20 mA in both directions.  
An external load, such as a microcomputer, can be  
connected to V . This value of V  
is 3.5 V for a  
DD  
DD  
maximum load current of 1.5 mA. V is highly resistive  
DD  
and can block up to 6 V in call and idle states. The typical  
value of the back-up capacitor is 47 F.  
The output signal without load is 2 (V - V –3.5 V)  
B
DD  
V(12,11 open  
V(12,11) load  
Ri  
where R  
– 1  
Rload  
Frequency Detection 2f, Pin 4 (5)  
= 400  
load  
Frequency detection takes place in the microcomputer.  
For this purpose, the output 2f supplies a square wave  
signal with double ringing frequency to the  
microcomputer. The output signal is CMOS-compatible.  
This terminal is highly resistive in idle and call states.  
Volume Adjustment A1, A0  
Pin 5 (6), 6 (7)  
The ringing volume is adjusted by means of a 2-bit D/A  
converter. The maximum volume is achieved with the bit  
combination A1 (MSB) = 1 and A0 (LSB) = 1. The  
volume can be reduced by approximately 35 dB (A) if a  
Comparator Threshold Adjustment  
bit combination of A1 = 0, A0 = 0 issupplied. The volume TH Pin 3 (4)  
is programmed by supplying a ground potential to these  
The on/ off threshold of the 2f comparator can be adjusted  
inputs.  
(terminal against ground respectively V ). To fulfill the  
DD  
Bundespost specification this terminal should be open.  
Melody, Pin 7 (9)  
The melody input inverts the activation phase of the  
bridge push-pull output stage. The input is CMOS-  
compatible and suitable for processing ringing  
frequencies.  
VDC, Pin 8, 9  
Decoupling diode for dc supply.  
TELEFUNKEN Semiconductors  
3 (6)  
Rev. A1, 06-May-96  
Preliminary Information  
U4074B  
Absolute Maximum Ratings  
Reference point, Pin 13 (15), unless otherwise specified, T  
= 25°C  
amb  
Parameters  
Pin 1, 14 (1, 16)  
Pin 11, 12 (13,14)  
Symbol  
Value  
50  
Unit  
mA  
mA  
°C  
Supply current  
I
s
Output current  
I
50  
0
Junction Temperature  
Ambient temperature  
Storage temperature  
Power dissipation  
T
125  
j
T
amb  
–25 to +60  
–40 to +125  
°C  
T
stg  
°C  
T
amb  
= 60°C  
DIP14  
P
P
860  
400  
mW  
mW  
tot  
tot  
SO16  
Thermal Resistances  
Parameters  
Symbol  
Value  
Unit  
Junction ambient  
DIP14  
SO16  
R
thJA  
75  
160  
K/W  
K/W  
Electrical Characteristics  
T
amb  
= –10 to 60°C, reference point is Pin 13 (15), unless otherwise specified  
Parameters  
Test Conditions / Pins  
Pin 1, 14 (1, 16)  
Symbol  
I
Min.  
Typ.  
1.1  
Max.  
1.4  
Unit  
Current consumption  
O = O = open  
mA  
1
2
A1 = A0 = 0, V = 15 V  
B
I
= –300 A,  
DD  
Pin 2 (3) open  
Input voltage  
Pin 1, 14 (1, 16)  
on threshold  
off threshold  
V
R
9.5  
4.5  
10.5  
5.5  
11.5  
6.5  
V
V
Audio frequency  
impedance  
f = 300 to 3400 Hz,  
200  
k
V
a,b  
= 1.5 V  
rms  
Output on resistance  
R
400  
30  
I
=
20 mA  
on  
(O1, O2)  
Internal voltage limitation  
I = 1 mA (Pin 2)  
V
25  
27  
V
V
Z
Z
Supply voltage for  
microcomputer  
0.5 mA > I < 1.5 mA  
3.15  
3.5  
3.85  
DD  
Leakage current  
I
V , V , V  
B
3.5 V  
2f  
a
b
I
I
10  
A
A0  
A1  
I
V
5.5 V  
0 V  
, V , V  
6 V  
A1 A0  
Melody  
I
100  
10  
A
DD  
V
DD  
6 V  
5.5 V  
V
DD  
Diode load current  
4 (6)  
80  
mA  
TELEFUNKEN Semiconductors  
Rev. A1, 06-May-96  
Preliminary Information  
U4074B  
Order Information  
Extended Type Number  
U4070B-FP  
Package  
SO16  
Remarks  
U4074B  
DIP14  
Dimensions in mm  
Package: DIP14  
Package: SO16  
TELEFUNKEN Semiconductors  
5 (6)  
Rev. A1, 06-May-96  
Preliminary Information  
U4074B  
Ozone Depleting Substances Policy Statement  
It is the policy of TEMIC TELEFUNKEN microelectronic GmbH to  
1. Meet all present and future national and international statutory requirements.  
2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems  
with respect to their impact on the health and safety of our employees and the public, as well as their impact on  
the environment.  
It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as  
ozone depleting substances (ODSs).  
The Montreal Protocol (1987) and its London Amendments (1990) intend to severely restrict the use of ODSs and  
forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban  
on these substances.  
TEMIC TELEFUNKEN microelectronic GmbH semiconductor division has been able to use its policy of  
continuous improvements to eliminate the use of ODSs listed in the following documents.  
1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively  
2. Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental  
Protection Agency (EPA) in the USA  
3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C (transitional substances) respectively.  
TEMIC can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain  
such substances.  
We reserve the right to make changes to improve technical design and may do so without further notice.  
Parameters can vary in different applications. All operating parameters must be validated for each customer  
application by the customer. Should the buyer use TEMIC products for any unintended or unauthorized  
application, the buyer shall indemnify TEMIC against all claims, costs, damages, and expenses, arising out of,  
directly or indirectly, any claim of personal damage, injury or death associated with such unintended or  
unauthorized use.  
TEMIC TELEFUNKEN microelectronic GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany  
Telephone: 49 (0)7131 67 2831, Fax number: 49 (0)7131 67 2423  
6 (6)  
TELEFUNKEN Semiconductors  
Rev. A1, 06-May-96  
Preliminary Information  

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