MIC1557YD5-TR

Programmable Timers And Oscillators Overview

The MIC1557YD5-TR is a CMOS RC oscillator from Microchip Technology's IttyBitty series, designed for precise frequency generation. Operating on a +2.7V to +18V supply, it features a Chip Select/Reset (CS) input for low-power shutdown with typical current consumption below 1 μA. The device generates a 50% duty cycle square wave using a single resistor and capacitor, reaching frequencies up to 5 MHz. Packaged in a TSOT-23-5 surface-mount format, it operates within an ambient temperature range of –40°C to +85°C.

Programmable Timers And Oscillators Feature Summary

• Low power consumption: <1 μA typical shutdown current via CS pin
• Wide operating voltage range: +2.7V to +18V
• High stability: <0.005%/°C temperature drift and <0.055%/V supply drift
• Rail-to-rail output with <15Ω on-resistance

Programmable Timers And Oscillators Applications

• Micropower oscillators up to 5 MHz
• LED blinker circuits
• Voltage converter charge-pump drivers
• Linear sweep generators
• Missing pulse detectors

Programmable Timers And Oscillators Procurement Notes

Verify the ordering suffix 'D5' corresponds to the 5-Lead Thin SOT-23 package as specified in the product identification system. Confirm the 'TR' suffix indicates a 3,000-unit reel quantity. Ensure the 'Y' suffix matches the required –40°C to +85°C industrial temperature rating for the specific application environment.

Programmable Timers And Oscillators Selection Notes

Select the MIC1557YD5-TR when astable oscillator operation is required without monostable triggering capabilities. Use this part instead of the MIC1555 if the separate trigger and threshold pins are unnecessary. Verify that the external timing components can support the desired frequency range while accounting for propagation delay dominance above 1 MHz.

Programmable Timers And Oscillators Part Context

This component belongs to the MIC1555/57 IttyBitty family, which functions similarly to industry-standard 555 timers but lacks frequency control and discharge pins. The MIC1557 variant is specifically optimized for astable operation only, utilizing a combined T/T pin and including a dedicated chip select/reset control for power management.

Programmable Timers And Oscillators Replacement Considerations

MIC1555YD5-TR serves as a parameter-equivalent alternative offering additional monostable functionality.