ALD7556

ADVANCED LINEAR DEVICES, INC. ALD7555/ALD7556 SINGLE/DUAL CMOS ANALOG RC TIMER GENERAL DESCRIPTION BENEFITS The ALD7555/ALD7556 timers are high performance single/dual mono- Saves battery power lithic analog RC timing circuits. They offer significantly upgraded perfor- Eliminates additional buffer mance in speed, leakage currents, supply current, stability, temperature Smaller, lower cost capacitor voltage stability, and discharge output drive when compared to SE555/ Extended range of time constants NE555,ICL7555, TLC555, and ICM7555. The ALD7555/ALD7556 offer the benefits of high input impedance, thereby allowing smaller timing capacitors and a longer timing cycle; high speed; low power dissipation for battery operated environment; reduced supply current spikes, allowing smaller and lower cost decoupling capacitors. APPLICATIONS High speed one-shot (monostable) Precision sequential timing Long delay timer Pulse width and pulse position modulation Each timer is capable of producing accurate time delays and oscillations in Missing pulse detector both monostable and astable operation, and operates in the one-shot Frequency divider (monostable) mode or 50% duty cycle free running oscillation mode with a Synchronized timer single resistor R and one capacitor C. The inputs and outputs are fully compatible with CMOS, NMOS or TTL logic. PIN CONFIGURATION There are three matched internal resistors (approximately 200KΩ each) that set the threshold an...