ALD1502PAL

Programmable Timers And Oscillators Overview

The ALD1502PAL is a single precision high-speed micropower timer manufactured by Advanced Linear Devices Inc. It utilizes advanced silicon gate CMOS technology to provide high input impedance and low power dissipation, making it suitable for battery-operated environments. The device operates with a supply voltage range of 2V to 12V and features a typical supply current of 50µA at 5V. It supports both monostable and astable modes with a typical oscillation frequency of 2.5MHz at 5V. The component is housed in an 8-pin Plastic DIP package and functions as a direct pin-compatible replacement for NE555 timers.

Programmable Timers And Oscillators Feature Summary

• High-speed operation with a typical oscillation frequency of 2.5MHz at 5V
• Low supply current consumption: 50µA typical (ALD1502) at 5V
• Wide operating supply voltage range from 2V to 12V
• Direct functional equivalent and same pin-out as NE555/NE556

Programmable Timers And Oscillators Applications

• High speed one-shot pulse generation
• Precision timing circuits
• Sequential timing applications
• Long delay timers
• Pulse width and pulse position modulation

Programmable Timers And Oscillators Procurement Notes

Verify the specific suffix 'PAL' corresponds to the 8-pin Plastic DIP package variant when sourcing components. Confirm that the lead-free (RoHS) designation aligns with project requirements, as indicated by the 'L' suffix in the ordering information. Ensure the operating temperature range of 0°C to +70°C meets the environmental specifications of the intended application.

Programmable Timers And Oscillators Selection Notes

Select the ALD1502PAL over bipolar counterparts when lower power consumption and higher input impedance are required. The CMOS construction allows for smaller timing capacitors and longer timing cycles compared to standard bipolar timers. Consider the 80mA discharge sinking capability if driving heavy loads directly from the discharge pin is necessary within the specified voltage limits.

Programmable Timers And Oscillators Part Context

The ALD1502PAL belongs to the ALD1502/ALD2502 series of single/dual precision high-speed micropower timers. This series is designed to offer the benefits of high input impedance and reduced supply current spikes, allowing for smaller decoupling capacitors. The PAL suffix specifically identifies the 8-pin Plastic DIP package version of the single-timer device.

Programmable Timers And Oscillators Replacement Considerations

The ALD1502PAL is functionally equivalent to and shares the same pin-out as the NE555 timer. Designers can replace standard bipolar 555 timers with this CMOS version to achieve lower power consumption and expanded frequency ranges without modifying the PCB layout.