Electronic Two-tone Ringer

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. By STMicroelectronics
Part Manufacturer Description Datasheet Samples
SN54ALS1240FK Rochester Electronics LLC Bus Driver, ALS Series, 2-Func, 4-Bit, Inverted Output, TTL, CQCC20, QCC-20
SN54ALS1240J Rochester Electronics LLC Bus Driver, ALS Series, 2-Func, 4-Bit, Inverted Output, TTL, CDIP20, DIP-20
LS1240 's PackagesLS1240 's pdf datasheet
E-LS1240A




LS1240 Pinout, Pinouts
LS1240 pinout,Pin out
This is one package pinout of LS1240,If you need more pinouts please download LS1240's pdf datasheet.

LS1240 circuits will be updated soon..., now you can download the pdf datasheet to check the circuits!

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