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