ICM7555ISA

Programmable Timers And Oscillators Overview

The ICM7555ISA is a single general-purpose CMOS timer manufactured by Analog Devices Inc./Maxim Integrated. It generates accurate time delays or frequencies using external RC components. The device operates within a supply voltage range of 2V to 18V and supports an operating temperature range of -20°C to +85°C. Key electrical parameters include a maximum oscillation frequency of 500kHz, a typical supply current of 60µA at 2V, and an output drive capability of up to 100mA. It features TTL-compatible outputs and low input currents for the TRIGGER, THRESHOLD, and RESET pins.

Programmable Timers And Oscillators Feature Summary

• Monolithic low-power CMOS design with extremely low supply current
• Wide operating supply voltage range from 2V to 18V
• TTL compatible output interface
• No crowbarring of supply during output transitions

Programmable Timers And Oscillators Applications

• Pulse generator
• Precision timing circuits
• Time delay generation
• Pulse-width modulation (PWM)
• Missing pulse detector

Programmable Timers And Oscillators Procurement Notes

Verify the specific suffix ISA against the manufacturer's ordering information to confirm the SOIC-8 package and -20°C to +85°C temperature grade. Ensure that any replacement parts maintain compatibility with the 2V to 18V supply range and the required 500kHz frequency limit. Check datasheet notes regarding latchup protection when powering up in multi-supply systems.

Programmable Timers And Oscillators Selection Notes

Select this component for battery-powered applications requiring low quiescent current. The ICM7555ISA is suitable for designs needing adjustable duty cycles in astable mode or precise monostable pulses. Consider the 100mA output drive capability for direct logic interfacing. Verify that external timing resistors and capacitors meet the accuracy specifications provided in the electrical characteristics table.

Programmable Timers And Oscillators Part Context

The ICM7555ISA belongs to the ICM7555/ICM7556 family of general-purpose timers. It serves as a CMOS alternative to standard bipolar 555 timers, offering significantly lower power consumption and higher input impedance. The 'ISA' designation specifically identifies the industrial temperature grade (-20°C to +85°C) and the SOIC-8 surface-mount package.

Programmable Timers And Oscillators Replacement Considerations

Direct substitutes include other CMOS 555 timers with similar pinouts and electrical specs, such as the ICM7555ESA (-40°C to +85°C) or generic equivalents like the TLC555. Ensure the replacement maintains the 2V minimum supply voltage and 500kHz frequency capability.