GENERAL DESCRIPTION

The ALD1502/ALD2502 timers are high performance single/dual monolithic timing circuits built with advanced silicon gate CMOS technology. They offer the benefits of high input impedance, thereby allowing smaller timing capacitors and a longer timing cycle; high speed, with typical cycle time of 400ns; low power dissipation for battery operated environment; reduced supply current spikes, allowing smaller and lower cost decoupling capacitors.

FEATURES

? High speed operation -- 2.5MHz typical oscillation at 5V

? High discharge sinking current of 80mA at 5V

? Guaranteed low operating supply voltage of 2V to 12V

? Functional equivalent to and same pin-out as NE555/NE556 with greatly expanded high and low frequency ranges

? High speed, low power, monolithic CMOS technology

? Low supply current: 50μA typical for ALD1502 and100μA typical for ALD2502

? Extremely low trigger, threshold and reset currents: 10pA typical

? Operates in both monostable and astable modes

? Fixed 50 duty cycle or adjustable duty cycle

? CMOS, NMOS and TTL compatible input/output

? Low supply current spikes

APPLICATIONS

? High speed one-shot (monostable) pulse generation

? Precision timing

? Sequential timing

? Long delay timer

? Pulse width and pulse position modulation

? Missing pulse detector

? Frequency divider

? Synchronized timer