U4076B TEMIC | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 6
Technical content
Features
/C0068Three-tone ringing sequence with 800 Hz, 1067 Hz and 1333 Hz /C0068Sequence frequency adjustable between 2.5 Hz and 25 Hz /C0068Adjustable volume /C0068Push-pull output stage /C0068Piezo transducer or loudspeaker connection /C0068Common input for frequency and call recognition /C0068Reduced pulse duration for electromagnetic transducers /C0068Clock oscillator with ceramic resonator or LC series cct possible /C0068Input protective diode /C0068On-chip rectifier bridge /C0068Protection circuit against ringing in a parallel circuit Benefit /C0068Suitable for German Post Office Specification, FTZ 121671 Pfl. 3, edition dated 24.03.82 Tone sequence oscillatorSupply Divider 32:1 Tone signal generator Reset a Level monitoring Divider 128:1 96 ms 127 ms Divider 2:1 Reset b Frequency monitoring Frequency Divider 32:1 Clock signal generator Divider 14:1 (10)9 (15) 13 (8)0.8 F 2.2 k a b (6) (16) R L 22 F 600 k 43 k 4.7 nF Ground: output signal Open: output signal (13) (12) Three state (1) 100 k log 2 (2) 3 (3) 455 kHz 93 7792 e /C0087 /C0109 /C0087 /C0087/C0109 /C0087 Figure 1. Block diagram and application circuit
Rev. A1, 15-May-96 Preliminary Information 2 (6) Pin Description Pin Symbol Function 1 (1) Frequency monitoring Open: 23 to 54 Hz Ground: 12 to 54 Hz With Pin 6 (7) connected: Switched off 2, 3 (2, 3) Clock signal generator 4 (5) Ground 5, 7 (6, 8) Power supply 6 (7) Charging capacitor, CL, for bridge rectifier (8, 9, 10) Frequency oscillator Pin Symbol Function 8, 9, Tone sequence (9, 10, 11) Frequency oscillator 11, 12 (12, 13) Output signals (15) Output signal shape Open = short pulse width Ground = 1:1 (16) Load resistance, RL (4, 14) Not connected Pin Connections and Functional Description Including External Circuitry Pin 1: Frequency monitoring Frequency is monitored via Pin 1. The following possibi- lities are available (three-state logic): 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. c) Pin 1 is connected to Pin 6 (7): ringing frequency has no influence (dc operation) Pins 2 and 3 (2, 3): Clock signal generator 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. 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 supplied by the exchange via lines a and b. A decoupling capacitor of 1 /C0109F in series with 2.2 k/C0087 resistance is needed for overvoltage protection and the insertion loss requirement of the German Post Office specifications. The supplied ac current is rectified by the on-chip bridge circuit. The rectified current charges the capacitor on Pin 6 (7), which supplies the dc voltage for the integrated 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 . Pins 8, 9 and 10 (9, 10, 11): Sequence frequency adjustment The sequence of the three-tone ringing frequency (800, 1067 and 1333 Hz) is determined by the external network calculated as follow: f 2 /C0043fOSC 192 whereas fOSC /C0043IC (43 k/C0087/C0041R V )4 7n F if: k /C0025 0.95 then Rv = 0 to 20 k Ω if: k /C0025 1 then R v = 30 to 150 k Ω if: k /C0025 1.2 then R v > 200 k Ω 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. The output signal without load is (2 V 6(7) – 2.5) Vpp. The output stage transducers in BTL configuration can pro- cess an average current of up to 20 mA, whereas a short time current of 40 mA is possible in both direction when t = 0.1 ms. An external current limitation is necessary when the IC is operating with voltage between Pin 6(7) and Pin 4 (5). The tone sequence always starts at the lower frequency.
Rev. A1, 15-May-96 Preliminary Information 4 (6)
Electrical Characteristics
V S = 10 V , fclock = 455 kHz,Tamb = 25 to 60°C. Reference point Pin 4 (5), Pin 13 (15) ground, unless otherwise specified. Parameters Test Conditions / Pins Symbol Min. Typ. Max. Unit Supply current (no load) outputs open V6(7) = 10 V Tamb = +25°C Pins 5 and 7 (6) IS 0.9 1.15 1.3 mA 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) fring 23 to 54 12 to 54 DC operation Hz 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 /C0006 20 mA Output signal frequency Pin 6 (7) Pin 6 (7) Pin 11 (12) Pin 12 (13) Pins 11 and 12 (12,13) R on R on 2.75 2.0 4.75 4.0 400 400 V V W W kHz Hz Hz Hz Build-up time of clock oscillator tB 10 ms Internal voltage limitation I Z=1 mA V 6–4 (7–5) Pin 6 (7) 25 27 30 V Repetition rate oscillator: Low state High state Allowable resistor Pin 8 (9) Pin 8 (9) Pins 8-10 (9-11) V 8(9) V 8(9) R 0.5 0.043 0.6 2.0 0.7 V V M Ω
Ordering Information
Extended Type Number Package Remarks U4076B-FL SO16 U4076B DIP14
Rev. A1, 15-May-96 5 (6) Dimensions in mm
Rev. A1, 15-May-96 Preliminary Information 6 (6) 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