MIC1555YM5-TR

The MIC1555 IttyBitty® CMOS RC timer/oscillator are designed to provide rail-to-rail pulses for precise time delay or frequency generation. The devices are similar in function to the industry standard “555”, without a frequency control (FC) pin or an opencollector discharge (D) pin. The threshold pin (THR) has precedence over the trigger (TRG) input, ensuring that the BiCMOS output is off when TRG is high. The MIC1555 can be used as an astable (oscillator) or monostable (one-shot) with separate threshold and trigger inputs. In the one-shot mode, the output pulse width is precisely controlled by an external resistor and a capacitor. Time delays may be accurately controlled from microseconds to hours. In the oscillator mode, the output is used to provide precise feedback, with a minimum of one resistor and one capacitor producing a 50% duty cycle square wave. The MIC1555 is powered from a +2.7V to +18V supply voltage and is rated for -40°C to +85°C ambient temperature range. The MIC1555 is available in SOT-23- 5, and thin SOT23-5 5-pin packages. A low profile, ultrathin, (UTDFN), version of the MIC1555 (with chip select) is also available.

+2.7V to +18V operation Low current 200µA typical (TRG and THR low) at 3V supply Timing from microseconds to hours “Zero” leakage trigger and threshold inputs 50% square wave with one resistor, one capacitor Threshold input precedence over trigger input <0.005%/°C temperature stability <0.055%/V supply stability 10-pin ultra-thin DFN package (2mm × 2mm × 0.4mm) Small SOT-23-5 surface mount package