Advanced Linear Devices ALD2502PBL

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.

• 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 and 100μA 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 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

• Each timer is capable of producing accurate time delays and oscillations in both monostable and astable operation, and operates in the one-shot (monostable) mode or 50% duty cycle free running oscillation mode with a single resistor and one capacitor.
• The inputs and outputs are fully compatible with CMOS, NMOS or TTL logic.