ISM97-1251AH-4.000MHZ

Oscillators Overview

The ISM97-1251AH-4.000MHZ is a standard CMOS crystal oscillator manufactured by ILSI, designed for surface-mount applications. It operates at a fundamental frequency of 4.000 MHz with a supply voltage of 1.8V. The device features enable/disable functionality, drawing a maximum current of 20mA during operation and 10µA in disable mode. Frequency stability is rated at ±25ppm across the operating temperature range of -40°C to +85°C. The component utilizes a 4-SMD, no-lead package with dimensions of 3.20mm x 2.50mm x 1.20mm.

Oscillators Feature Summary

• Supports active enable and disable control for power management
• Utilizes CMOS output logic for digital interface compatibility
• Constructed in a compact leaded surface-mount ceramic package

Oscillators Applications

• Clock signal generation for microprocessors
• Timing reference for communication interfaces
• Power management circuit synchronization

Oscillators Procurement Notes

Verify the specific frequency suffix matches the required system clock speed, as the ISM97 series offers multiple variants. Confirm that the 1.8V supply voltage aligns with the target application's power rails. Ensure the PCB footprint accommodates the 4-SMD no-lead package dimensions of 3.20mm x 2.50mm. Check RoHS compliance status if environmental regulations apply to the final assembly.

Oscillators Selection Notes

Select this component when a low-voltage 1.8V CMOS oscillator is required for space-constrained designs. The enable/disable feature makes it suitable for battery-powered devices requiring power optimization. Consider the ±25ppm stability rating against the timing requirements of the connected digital logic. The standard XO type provides a reliable alternative to discrete crystal circuits.

Oscillators Part Context

This part belongs to the ISM97 series of surface-mount oscillators from ILSI. The series includes various frequencies and voltage options, such as 24MHz and 66.666MHz variants. These components are designed to replace discrete crystal and resonator combinations, offering a standardized solution for embedded systems requiring precise timing signals.

Oscillators Replacement Considerations

Direct substitutes include other ISM97 series parts with identical pinout and electrical characteristics but different frequencies, such as ISM97-1251AH-24.000MHZ or ISM97-1251AH-66.666MHZ, provided the system clock requirement changes.