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PDF UTC1240A Data sheet ( Hoja de datos )
| Número de pieza | UTC1240A | |
| Descripción | Electronic Dual Tone Ringer | |
| Fabricantes | Hangzhou Silan Microelectronics | |
| Logotipo |  |
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UTC1240A
LINEAR INTEGRATED CIRCUIT
ELECTRONIC DUAL-TONE RINGER
DESCRIPTION
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 is provided on the output stage of
UTC1240A,so a minimum load DC of 50 ohms is adviced.
The two tone frequencies generated are switched by an
internal oscillator in a fast sequence and made audible across
an output amplifier in the loudspeaker,both tone frequencies
and the switching frequency can be externally adjusted.The
signal and the circuit is designed so that noise on the lin or
variations of the ringing signal cannot affect correct operation
of the device.
DIP-8
FEATURES
* Low current consumptioin,in order to allow the parallel
* Little external circuitry.
operation of 4 devices.
* Tone and switching frequencies adjustable
* Integrated rectifier bridge with zener dDioadetsaStohpereotte4cUt .com by external components.
against overvoltage.
* Intergrated voltage and current hysteresis
TEST CIRCUIT
1F 2.2k¡
85
VAB 7 UTC1240A RL Vout
10F
f1= 27200
R1(k¡
1 23
4
R1
C1 14k¡
100nF
f2=0.725f1
f ( SWEEP )=
750
C1(nF)
DataShee
YOUW ANG ELECTRONICS CO.LTD
DataSheet4U.com
DataSheet4 U .com
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1 page | ||
| Páginas | Total 3 Páginas | |
| PDF Descargar | [ Datasheet UTC1240A.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| UTC1240A | Electronic Dual Tone Ringer | Hangzhou Silan Microelectronics |
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