DESCRIPTION
The M7621 integrated circuit combines all required functions for a single chip Passive Infra Red (PIR) light controller. It is
designed for load switching with a transistor or a relay in 3 wire AC and DC systems.
A conventional PIR sensor connects directly to the PIR input. The pull-down resistor and DC decoupling circuitry are integrated on
chip.
The PIR signal is converted to a 15 bit digital value. External potentiometers or resistors are used to set the operating parameters
for sensitivity, on-time, brightness, fade, CDS sensor and environment temperature correction. The corresponding voltage levels
are converted to digital values with a 4 bit resolution all signal processing is performed digitally.
FEATURES
‧ Digital signal processing
‧ Temperature compensation input
‧ Adjustment brightness.
‧ Adjustable PIR sensitivity
‧ Adjustable output turn-on time
‧ Retrigger / Non-retrigger function
‧ Dimmer function
‧ PWM output
‧ RELAY output
‧ SOP-16 package
APPLICATIONS
‧ PIR light controller, Motion Detector, Alarm system, Auto-door bell