Standard Timer Single 5-Pin SOT-23 T/R

The MIC1557 IttyBitty® CMOS RC 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 MIC1557 is designed for astable (oscillator) operation only, with a chip select/reset (CS) input for low power shutdown. One resistor and one capacitor provide a 50% duty cycle square wave. Other duty-cycle ratios may be produced using two diodes and two resistors. The MIC1557 is powered from a +2.7V to +18V supply voltage and is rated for -40°C to +85°C ambient temperature range. The MIC1557 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 <1µA typical shutdown mode (MIC1557) 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