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LI NEAR I NTEGRATED CI RCUI T ELECTRONIC DUAL-TONE RINGER The UTC1240A are monolithic integrated circuits designed to replace the mechanical bell in telephone sets in connection with an electro-acoustical converter.Both devices can drive directly a piezoceramic converter (buzzer). The output of UTC1240A needs a decoupling capacitor. No current limitation i.
* Low current consumptioin,in order to allow the parallel operation of 4 devices. against overvoltage.
* Little external circuitry.
* Tone and switching frequencies adjustable
* Intergrated voltage and current hysteresis
DataSheet4U.com by external components.
* Integrated rectifier bridge with zener diodes to protect
DataShee
TEST CIRCUIT
1F
2.2k¡
8
5
VAB
7
UTC1240A
RL
Vout
10F
1
2
3
4 C1 100nF R1 14k¡
f1=
27200 R1(k¡
f2=0.725f1
750 f ( SWEEP )= C1(nF)
YOUW ANG ELECTRONI CS CO. LTD
1
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UTC1240A
Characteristic
Ca.
| No. | Partie # | Fabricant | Description | Fiche Technique |
|---|---|---|---|---|
| 1 | UTC1237 |
YOUWANG |
PROTECTOR IC |
|
| 2 | UTC1005 |
Teledyne |
Thin Film Cascadable Amplifier |
|
| 3 | UTC1018 |
YOUWANG |
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|
| 4 | UTC1031 |
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| 5 | UTC1044 |
Agilent Technologies |
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| 6 | UTC1058 |
TELEDYNE |
Thin-Film Cascadable Amplifier |
|
| 7 | UTC1062 |
Hangzhou Silan Microelectronics |
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|
| 8 | UTC1062A |
Hangzhou Silan Microelectronics |
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| 9 | UTC1117 |
Hangzhou Silan Microelectronics |
1A LOW DROPOUT POSITIVE VOLTAGE REGULATOR |
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| 10 | UTC1316 |
Hangzhou Silan Microelectronics |
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| 11 | UTC1353 |
Hangzhou Silan Microelectronics |
TV Sound System |
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| 12 | UTC1366 |
Hangzhou Silan Microelectronics |
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|