ALD555PAL

Programmable Timers And Oscillators Overview

The ALD555PAL is a high-performance monolithic timing circuit manufactured by Advanced Linear Devices using silicon gate CMOS technology. It operates within a supply voltage range of 2V to 12V and supports an operating temperature range of 0°C to +70°C. The device features a typical supply current of 100µA, maximum oscillation frequency of 2MHz, and output drive capabilities including a sink current of up to 10mA and source current of -2mA. Packaged in an 8-pin Plastic DIP (PDIP-8), it provides accurate time delays and oscillations in both monostable and astable modes.

Programmable Timers And Oscillators Feature Summary

• High-speed operation with a typical cycle time of 500ns and maximum frequency of 2MHz
• Low power consumption with typical supply current of 100µA
• CMOS, NMOS, and TTL compatible inputs and outputs
• Capable of producing accurate time delays and oscillations in monostable and astable modes

Programmable Timers And Oscillators Applications

• High speed one-shot pulse generation
• Precision timing and sequential timing
• Long delay timer applications
• Pulse width and pulse position modulation
• Missing pulse detection and frequency division

Programmable Timers And Oscillators Procurement Notes

Verify the package type matches the required PCB footprint, as the PAL suffix specifically denotes the 8-pin Plastic DIP configuration. Confirm that the commercial temperature range of 0°C to +70°C aligns with the system's environmental requirements. Ensure the design accounts for the 600mW power dissipation limit under expected operating conditions.

Programmable Timers And Oscillators Selection Notes

Select the ALD555PAL when low power consumption and high input impedance are critical for extending battery life or allowing smaller timing capacitors. This component is suitable for designs requiring compatibility with standard logic families like CMOS, NMOS, or TTL. Consider alternative packages such as SOIC or CERDIP if surface mount or higher temperature ratings are needed.

Programmable Timers And Oscillators Part Context

The ALD555PAL belongs to the ALD555 series of high-speed CMOS timers. It serves as a functional equivalent to the NE555 but offers expanded performance characteristics, including lower supply current and improved speed. The series includes variants like the ALD555SAL (SOIC) and ALD555DA (CERDIP) to accommodate different packaging and environmental needs.

Programmable Timers And Oscillators Replacement Considerations

The datasheet identifies the ALD555PAL as functionally equivalent to the NE555. Designers may consider other CMOS 555 timer equivalents from various manufacturers, provided they meet the specific electrical requirements for supply voltage, current, and package dimensions.