ALD7555SAL

Programmable Timers And Oscillators Overview

The ALD7555SAL is a single-channel CMOS analog RC timer manufactured by Advanced Linear Devices. It operates within a supply voltage range of 2V to 10V and consumes a typical supply current of 50 µA. The device supports oscillation frequencies up to 2.5 MHz at 5V and features an enhanced discharge sinking current of 80 mA. It utilizes a high-impedance input architecture with typical leakage currents of 10 pA, enabling precise timing with smaller capacitors. The component is housed in an 8-pin SOIC package and functions as a direct pin-compatible replacement for standard bipolar 555 timers.

Programmable Timers And Oscillators Feature Summary

• High-speed operation with a typical oscillation frequency of 2.5 MHz at 5V
• Enhanced discharge output drive capable of sinking 80 mA at 5V
• Low power consumption with a typical supply current of 50 µA
• Extremely low trigger, threshold, and reset currents (10 pA typical)

Programmable Timers And Oscillators Applications

• Precision sequential timing circuits
• Pulse width and pulse position modulation
• Missing pulse detection systems
• Frequency division and synchronization

Programmable Timers And Oscillators Procurement Notes

Verify the specific ordering suffix 'L' confirms lead-free (RoHS) compliance as defined by the manufacturer. Confirm that the 8-SOIC package dimensions match the target PCB footprint. Ensure the operating environment remains within the specified 0°C to +70°C temperature range for this package variant.

Programmable Timers And Oscillators Selection Notes

Select the ALD7555SAL when a single timer channel is required in surface-mount applications. Choose this part over bipolar equivalents if lower supply current or higher speed is necessary. Verify that the 80 mA discharge sink capability meets load requirements without external buffering. Consider the ALD7556 if dual channels are needed.

Programmable Timers And Oscillators Part Context

The ALD7555SAL belongs to the ALD7555/ALD7556 series of monolithic analog RC timing circuits. It serves as a functional equivalent to NE555, SE555, TLC555, and ICM7555 devices but offers improved performance in speed, leakage currents, and stability. The 'SAL' designation specifically identifies the single-channel version in an 8-pin SOIC package with lead-free construction.

Programmable Timers And Oscillators Replacement Considerations

The datasheet lists NE555, SE555, TLC555, ICM7555, and ICL7555 as functional equivalents with identical pin-outs. These parts can be replaced directly in existing designs to gain performance improvements.