BL1240 Datasheet - SHANGHAI BELLING

BL1240, Low current consumption

www.DataSheet4U.com BL1240 ELECTRONIC TWO * TONE RINGER .
BL1240 is a monolithic integrated circuit designed to repace mechanical bell in telephone sets in connection with an electro-acoustical converter.

Features

* Low current consumption, in order to allow the parallel operation of 4 devices. Integrated rectifier bridge with zener diodes to protect against overvoltages. Little external circuitry. Tone and switching frequencies adjustable by external components. Integrated voltage and current hysteresis. Desc

BL1240_SHANGHAIBELLING.pdf