4528BDC

Overview

The CD4528BDC is a dual monostable multivibrator from the 4000/14000/40000 series, manufactured by Fairchild Semiconductor. It utilizes CMOS technology and is housed in a PDSO16 package (SOIC-16). The device operates within a supply voltage range of 3.0V to 18V and features a typical quiescent current of 5.0 nA/package at 5.0 VDC. It supports triggering from either the rising or falling edge of an input pulse. The component is rated for operation between -55°C and 125°C.

Feature Summary

• Dual retriggerable and resettable monostable multivibrator configuration
• Edge-triggered operation from leading or trailing input pulses
• Diode protection on all inputs
• Capable of driving two low-power TTL loads

Applications

• Timing circuits requiring precise pulse width determination via external components
• Debouncing switches or contacts
• Pulse generation and shaping in digital logic systems

Procurement Notes

Verify the specific suffix 'DC' against official Fairchild documentation to confirm package type and temperature grade. Ensure compatibility with existing PCB footprints for SOIC-16 packages. Confirm RoHS status as historical data indicates non-compliance for some variants. Validate supplier authenticity due to potential obsolescence or redistribution.

Selection Notes

Select this component when dual independent timing channels are required in a single package. Consider the wide supply voltage range and low power consumption. Verify that the output drive capability meets the load requirements for connected TTL devices. Check availability of compatible replacement packages if surface-mount assembly is preferred.

Part Context

The CD4528B belongs to the widely used 4000-series CMOS logic family. It serves as a fundamental building block for creating single-shot pulse generators. The device complements other timing ICs like the CD4541 or CD4538 by offering a simpler, dual-channel solution for basic delay applications without complex programming.

Replacement Considerations

CD4528BCMX

FAQ

Can the CD4528BDC be triggered by both rising and falling edges?

Yes, the device allows triggering from either the rising or falling edge of an input pulse.

What determines the pulse duration of the output?

The pulse duration and accuracy are determined by external timing components, specifically a resistor (Rx) and a capacitor (Cx).