MC14021BFELG

Shift Registers Overview

The MC14021BFELG is an 8-bit static shift register from the onsemi 4000B series, housed in a 16-SOEIAJ surface-mount package. It features asynchronous parallel input and serial output capabilities, constructed with MOS P-channel and N-channel enhancement mode devices. The device operates within a supply voltage range of 3.0 Vdc to 18 Vdc and supports full static operation. It includes double diode input protection and provides Q outputs from the sixth, seventh, and eighth stages.

Shift Registers Feature Summary

• Asynchronous parallel data loading with serial output shifting
• Full static operation for low power consumption and high noise immunity
• Direct access to internal stage outputs at positions six, seven, and eight

Shift Registers Applications

• Parallel-to-serial data conversion circuits
• Synchronous and asynchronous parallel input data queueing
• General-purpose register applications requiring low power operation

Shift Registers Procurement Notes

Verify the specific ordering suffix ELG against official manufacturer documentation to confirm package type and tape-and-reel specifications. Confirm RoHS compliance status as historical data indicates potential non-compliance for certain variants in this family. Ensure the component meets current environmental regulations for your target market before finalizing procurement.

Shift Registers Selection Notes

Select the MC14021BFELG when asynchronous parallel loading is required, distinguishing it from the synchronous MC14014B variant. Ensure the design accommodates the 3V to 18V supply range and SOEIAJ-16 footprint. Verify that the driving logic levels are compatible with the CMOS input thresholds across the intended operating temperature range.

Shift Registers Part Context

This component belongs to the MC14014B/MC14021B dual datasheet family published by onsemi. The MC14021B serves as a pin-for-pin replacement for the CD4021B. The BFELG designation specifically identifies the EIAJ-style SOIC package variant supplied in tape and reel format, differing from rail or tube packaging options available for other suffixes.

Shift Registers Replacement Considerations

The MC14021B is a direct pin-for-pin replacement for the CD4021B. Designers should verify that any substitute maintains the asynchronous parallel load characteristic, which distinguishes it from the synchronous MC14014B/CD4014B counterpart.