GENERAL DESCRIPTION

The M75118 is a low-current CMOS circuit providing all of the required features for an ionization-type smoke detector. A

networking capability allows as many as 125 units to be interconnected so that if any unit senses smoke, all units will sound an

alarm. In addition, special features are incorporated to facilitate alignment and test of the finished smoke detector. can be used in

numerous other battery-operated safety/security applications.

FEATURES

‧ Piezoelectric Horn driver.

‧ Guard outputs on both sides of detect Input.

‧ Low-battery trip point, internally set , can be altered via external resistor.

‧ Detect threshold, internally set , can be altered via external resistor.

‧ Pulse testing for low-battery uses LED for battery loading.

‧ Comparators output for detect.

‧ Internal Reverse Battery Protection.

‧ I/O Pin allows up to 125 units to be connected for common signaling.

‧ Power-on reset places IC in standby mode.