ICM7555ISA-T

Programmable Timers And Oscillators Overview

The ICM7555ISA-T is a single general-purpose CMOS timer from the ICM7555 series, 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 features extremely low supply current, typically 30µA at 2V and 120µA at 18V. It supports astable and monostable modes with a guaranteed maximum oscillation frequency of 500kHz. The component is housed in an 8-pin SOIC package and is rated for an operating temperature range of -20°C to +85°C.

Programmable Timers And Oscillators Feature Summary

• Monolithic, low-power CMOS design with supply currents significantly lower than bipolar 555 timers.
• Wide operating supply voltage range from 2V to 18V.
• TTL compatible output capable of driving standard TTL loads.
• No crowbarring of supply during output transitions due to minimal current spikes.

Programmable Timers And Oscillators Applications

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

Programmable Timers And Oscillators Procurement Notes

Verify that the 'T' suffix indicates tape-and-reel packaging, distinct from tube-packaged variants like the ICM7555ISA+. Confirm the specific manufacturer lot and date code upon receipt. Ensure ESD precautions are taken during handling as specified in the datasheet.

Programmable Timers And Oscillators Selection Notes

Select this part for battery-powered systems requiring low quiescent current. Use the ICM7555ISA-T when surface-mount assembly is required. Verify that the 100mA output drive capability meets load requirements. Consider the ICM7556 if dual timers are needed on a single chip.

Programmable Timers And Oscillators Part Context

The ICM7555 is the single-timer version of the ICM7556 dual-timer family. Both utilize CMOS technology to replace standard bipolar 555/556 timers, offering improved performance at high frequencies and lower power consumption. The ISA variant specifically denotes the 8-pin SOIC package with the -20°C to +85°C industrial temperature range.

Programmable Timers And Oscillators Replacement Considerations

Direct replacements include other manufacturers' CMOS 555 timers such as the TLC555 or LMC555. For pin-compatible upgrades, verify that the substitute maintains the 2V-18V supply range and similar leakage currents. Check if the alternative requires external decoupling capacitors, which the ICM7555 typically does not.