U4076B-FL [TEMIC]
Three-Tone Ringer for Telephone Sets; 三音振铃的电话机
| 型号： | U4076B-FL |
| 厂家： | 
TEMIC SEMICONDUCTORS |
| 描述： | Three-Tone Ringer for Telephone Sets |
| 文件： | 总6页 (文件大小：92K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
U4076B
Three-Tone Ringer for Telephone Sets
Description
The three-tone ringing integrated circuit U4076B, in There is also a possibility of operating the IC with the dc
conjunction with a piezo transducer or loudspeaker supply voltage, being developed for large operating
replaces the normal electromechanical telephone bell. It range. The integrated circuit is overload protected.
is operated with the ringing current from the exchange.
Features
Three-tone ringing sequence with 800 Hz, 1067 Hz
and 1333 Hz
Clock oscillator with ceramic resonator or LC series
cct possible
Sequence frequency adjustable between 2.5 Hz and
25 Hz
Input protective diode
On-chip rectifier bridge
Adjustable volume
Push-pull output stage
Protection circuit against ringing in a parallel circuit
Piezo transducer or loudspeaker connection
Common input for frequency and call recognition
Benefit
Reduced pulse duration for electromagnetic
transducers
Suitable for German Post Office Specification,
FTZ 121671 Pfl. 3, edition dated 24.03.82
43 k
4.7 nF
22
F
6
600 k
Ground: output signal
Open: output signal
4
(5)
(7)
10 (11)
8
(9)
9
(10)
(15) 13
2.2 k
F
7
a
(8)
0.8
Tone sequence
oscillator
12
Supply
~
~
b
(13)
5
Divider
32:1
Tone signal
generator
Level
(6)
monitoring
11
(12)
100 k
log
Reset
a
96 ms
127 ms
Divider
128:1
Divider
2:1
Reset
b
Frequency
monitoring
R
L
14
Frequency
(16)
1
2 (2)
3 (3)
455 kHz
Three
state
Divider
32:1
Divider
14:1
Clock signal
generator
(1)
93 7792 e
Figure 1. Block diagram and application circuit
Case: DIP14 or SO16-L (Pin connections for SO 16-L case in bracket)
TELEFUNKEN Semiconductors
1 (6)
Rev. A1, 15-May-96
Preliminary Information
U4076B
Pin Description
Pin
1 (1)
Symbol
Function
Pin
8, 9,
10
(9, 10,
11)
11, 12
(12,
Symbol
Function
Tone sequence
Frequency monitoring
Open: 23 to 54 Hz
Ground: 12 to 54 Hz
With Pin 6 (7) connected:
Switched off
Frequency oscillator
Output signals
2, 3
(2, 3)
Clock signal generator
13)
4 (5)
5, 7
(6, 8)
Ground
Power supply
13
(15)
Output signal shape
Open = short pulse width
Ground = 1:1
6 (7)
Charging capacitor, C for
14
Load resistance, R
L,
L
bridge rectifier
(16)
(8, 9,
10)
Frequency oscillator
(4,
14)
Not connected
circuit. Instead of a ringing ac current supplied by the ex-
change, the IC can be driven by a dc voltage applied
directly to terminals 6 (7) (+) and 4 (5) (–). An integrated
Z diode limits the maximum supply voltage range up to
27 V.
Pin Connections and Functional
Description Including External
Circuitry
Pin 1: Frequency monitoring
Pins 8, 9 and 10 (9, 10, 11):
Sequence frequency adjustment
Frequency is monitored via Pin 1. The following possibi-
lities are available (three-state logic):
The sequence of the three-tone ringing frequency (800,
1067 and 1333 Hz) is determined by the external network
calculated as follow:
a) Pin 1 is open: ringing frequency is between 23 and
54 Hz.
b) Pin 1 is grounded: ringing frequency is between 12
and 54 Hz.
fOSC
192
IC
RV) 47 nF
f2
whereas fOSC
(43 k
c) Pin 1 is connected to Pin 6 (7): ringing frequency has
no influence (dc operation)
if: k 0.95 then R
=
=
>
0 to 20 kΩ
30 to 150 kΩ
200 kΩ
v
v
v
if: k
1
then R
Pins 2 and 3 (2, 3): Clock signal generator
if: k 1.2 then R
A ceramic resonator for a frequency of 455 kHz must be
connected between Pin 2 (2) and Pin 3 (3). The clock
frequency of the generator is used for three-tone ringing
sequence and control signals for frequency identification.
The sequence frequency adjustment is determined by the
frequency prescaler ratio in the IC.
Pins 11 and 12 (12, 13): Output signal
The three-tone ringing sequence of 800 Hz, 1067 Hz and
1333 Hz is realized if the clock oscillator is synchronised
with a ceramic resonator of 455 kHz between Pins 2 (2)
and Pin 3 (3). This gives excellent tone frequency and
eliminates complicated frequency setting procedures.
Pin 4 (5): Ground
Reference point for all voltages.
Pins 5, 6 and 7 (6, 7, 8): Power supply
Pins 5 (6) and 7 (8) connect the circuit with a ringing ac The output signal without load is (2 V
– 2.5) V The
6(7)
pp.
supplied by the exchange via lines a and b. A decoupling output stage transducers in BTL configuration can pro-
capacitor of 1 F in series with 2.2 k resistance is cess an average current of up to 20 mA, whereas a short
needed for overvoltage protection and the insertion loss time current of 40 mA is possible in both direction when
requirement of the German Post Office specifications. t = 0.1 ms. An external current limitation is necessary
The supplied ac current is rectified by the on-chip bridge when the IC is operating with voltage between Pin 6(7)
circuit. The rectified current charges the capacitor on and Pin 4 (5). The tone sequence always starts at the
Pin 6 (7), which supplies the dc voltage for the integrated lower frequency.
2 (6)
TELEFUNKEN Semiconductors
Rev. A1, 15-May-96
Preliminary Information
U4076B
Pin 4 (5) and the dummy load is switched-off. In
off-position, Pin 14 (16) is connected with Pin 6 (7)
internally and the dummy load is switched on.
Pin 13 (15): Output signal shape
Output signal has different duty cycles according to the
position of Pin 13 (15). When grounded it has a duty cycle
of 1:1. When using a dynamic loudspeaker (activa-
Overload protection
tion via transformer/capacitor),
a
reduced signal
The integrated circuit can withstand an ac voltage of
110 V / 50 Hz for 15 seconds between terminals a and b.
is recommended. This can be achieved by connecting a
capacitor greater than 1 nF between Pin 13 (15) and
ground.
The circuit will not be damaged by a surge voltage test
with the following conditions:
Pin 14 (16): Switched on/off
Switched on/off is controlled by Pin 14 (16). The dc Charging voltage of surge capacitance: V = 2 kV
cs
voltage on the charge capacitor between Pin 4 (5) and 6 Pulse shape: 10/700 µs
(7) is loaded a dummy load as long as the tone ringing is Pulse sequence: 30 s
not switched-on. In on-position (amplitude and frequency No of surges: 10
recognition), Pin 14 (16) is connected internally with Polarity change after five surges
15
25
a
10 F
Tone ringing
Figure 1
2 kV
110
0.22 F
b
93 7575 e
Figure 2. Surge voltage test circuit
Absolute Maximum Ratings
Reference point Pin 4 (5) unless otherwise specified
Parameters
Symbol
Value
50
50
Unit
mA
mA
°C
Supply current
Output current
Pins 5 and 7 (6, 8)
Pins 11 and 12 (12, 13)
I
S
I
0
Junction temperature
Ambient temperature range
Storage temperature range
Power dissipation
T
125
j
T
T
–25 to +60
–40 to +125
°C
°C
amb
stg
T
amb
= 60 °C
DIP14
SO16-L
P
P
860
720
mW
mW
tot
tot
Thermal Resistance
Parameters
Symbol
Value
Unit
Junction ambient
DIP14
SO16-L
R
thJA
R
thJA
75
90
K/W
K/W
TELEFUNKEN Semiconductors
3 (6)
Rev. A1, 15-May-96
Preliminary Information
U4076B
Electrical Characteristics
V = 10 V, f
= 455 kHz,T = 25 to 60°C. Reference point Pin 4 (5), Pin 13 (15) ground, unless otherwise specified.
amb
S
clock
Parameters
Supply current (no load)
Test Conditions / Pins
Pins 5 and 7 (6)
Symbol
Min.
Typ.
Max.
Unit
mA
Hz
outputs open V
= 10 V
6(7)
T
amb
= +25°C
I
S
0.9
1.15
1.3
Frequency range of the
ringing input current
a) Pin 1 - open
b) Pin 1 - grounded
c) Pin 1 - connected to
Pin 6 (7)
Pins 5 and 7 (6, 8)
23 to 54
12 to 54
DC
f
ring
operation
AC-operation
Switch-on threshold
Switch-off threshold
Pin 6 (7)
6.5
3.5
8.5
5.5
V
DC-operation
Switch-on threshold
Switch-off threshold
Output on resistances
at 20 mA
Pin 6 (7)
Pin 6 (7)
Pin 11 (12)
Pin 12 (13)
2.75
2.0
4.75
4.0
400
400
V
V
W
R
R
on
W
on
Output signal frequency
f
f
f
f
448/455
800/812
1067/1083
1333/1354
10
kHz
Hz
Hz
Hz
ms
0
1
2
3
Pins 11 and 12 (12,13)
Build-up time of clock
oscillator
t
B
Internal voltage limitation
V
25
27
30
V
6–4 (7–5)
I =1 mA
Z
Pin 6 (7)
Repetition rate oscillator:
Low state
High state
Pin 8 (9)
Pin 8 (9)
Pins 8-10 (9-11)
V
0.5
0.6
2.0
0.7
2
V
V
MΩ
8(9)
V
8(9)
Allowable resistor
R
0.043
Ordering Information
Extended Type Number
U4076B-FL
Package
SO16
Remarks
U4076B
DIP14
4 (6)
TELEFUNKEN Semiconductors
Rev. A1, 15-May-96
Preliminary Information
U4076B
Dimensions in mm
Package: SO16-L
Package: DIP14
TELEFUNKEN Semiconductors
5 (6)
Rev. A1, 15-May-96
Preliminary Information
U4076B
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, 15-May-96
Preliminary Information
相关型号：
©2020 ICPDF网 联系我们和版权申明