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E-LS1240AD1 Datasheet PDF - STMicroelectronics

Part Name
Description
Manufacturer
E-LS1240AD1
ST-Microelectronics
STMicroelectronics ST-Microelectronics
Other PDF
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PDF
E-LS1240AD1 Datasheet PDF : E-LS1240AD1 pdf     
LS1240A image

Description
LS1240 is a monolithic integrated circuit designed to replace the mechanical bell in telephone sets in connection with an electro-acoustical converter. It can drive directly a piezoceramic converter (buzzer) or a dynamic loudspeaker.
The output current capability of LS1240 is higher than the one of a standard ringer. To drive a dynamic loudspeaker LS1240 can simply use a decoupling capacitor, thus eliminating the usual transformer.
No current limitation is provided on the output stage of LS1240, so a minimum load DC of 50 Ω is advised, in series with a proper capacitor.

Features
■ Low current consumption, in order to allow the parallel operation of 4 devices
■ Integrated rectifier bridge with zener diodes to protect against over voltages little external circuitry
■ Tone and switching frequencies adjustable by external components
■ Integrated voltage and current hysteresis

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Part Name
Description
PDF
Manufacturer
Electronic Two Tone Ringer
Hynix Semiconductor
Electronic Two-Tone Ringer
Wing Shing International Group
Electronic Two Tone Ringer
Hyundai Micro Electronics
ELECTRONIC TONE RINGER WITH BUILT-IN BRIDGE RECTIFIER
Contek Microelectronics
SA2531/2 Single Chip Telephone: Using dynamic microphone as tone ringer
South African Micro Electronic Systems
TONE RINGER
Unspecified
TELEPHONE TONE RINGER
Contek Microelectronics
Tone Ringer
SANYO -> Panasonic
Tone Ringer
ROHM Semiconductor
Tone Ringer
Integral Corp.

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