DESCRIPTION

· The ALD7555/ALD7556 are high-performance single/dual monolithic analog RC timing circuits.

· They offer improved performance in speed, leakage currents, supply current, stability, temperature voltage stability, and discharge output drive compared to SE555/NE555, ICL7555, TLC555, and ICM7555.

· These timers are capable of producing accurate time delays and oscillations in both monostable and astable operations.

· They operate in one-shot (monostable) mode or 50% duty cycle free-running oscillation mode with a single resistor and capacitor.

· Inputs and outputs are fully compatible with CMOS, NMOS, or TTL logic.

FEATURES

· Improved accuracy and temperature stability.

· High-speed operation with 2.5MHz typical oscillation at 5V.

· High discharge sinking current of 80mA at 5V.

· Guaranteed low operating supply voltage from 2V to 10V.

· Functional equivalent to and same pin-out as NE555/NE556, SE555, TLC555, ICM7555/ICM7556.

· Greatly expanded high and low frequency ranges.

· High speed, low power, monolithic CMOS technology.

· Low supply current: typically 50 µA for ALD7555, 100 µA for ALD7556.

· 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.

· Rail to rail output.

APPLICATIONS

· Precision sequential timing.

· Long delay timer.

· Pulse width and pulse position modulation.

· Missing pulse detector.

· Frequency divider.

· Synchronized timer.