ALD4301APBL

Overview

The ALD4301APBL is a quad precision CMOS voltage comparator featuring open-drain outputs. It operates on a single +5V or dual ±5V supply with a range of 3V to 10V. Key electrical parameters include a typical input bias current of 10pA, response time of 300ns for TTL inputs, and high output sinking current of 60mA. The device provides 55µA per comparator supply current and maintains high gain.

Feature Summary

• Extremely low input bias currents typically at 10pA
• Open-drain outputs allowing wired-OR connections
• High output sinking current capability up to 60mA
• CMOS, NMOS, and TTL compatible logic levels

Applications

• High source impedance voltage comparison circuits
• Dual/Quad limit window comparators
• Photo-detector sensor circuits
• Battery operated instruments

Procurement Notes

Verify the specific suffix PBL indicates the 14-pin Plastic DIP package variant. Confirm lead-free status as 'L' denotes lead-free versions in ordering information. Ensure operating temperature requirements align with the 0°C to +70°C rating for this package type rather than the extended industrial range available in other packages.

Selection Notes

Select this component when high input impedance and low standby power are critical alongside standard TTL compatibility. The open-drain architecture supports flexible interfacing with various logic families and allows connection to external voltages higher than V+. Consider thermal effects if driving large output current transients continuously.

Part Context

This part belongs to the ALD4301A/ALD4301 series of monolithic quad voltage comparators built with silicon gate CMOS technology. It serves as a functional equivalent to LM393 types but offers superior input impedance characteristics suitable for precision detection applications requiring minimal loading on high-impedance sources.

Replacement Considerations

Pinout and functional equivalents include LM393 types. Other compatible devices from the same family include ALD2301, ALD2302, and ALD2303 for mixed open-drain and push-pull configurations.