The 74FCT521ASCX is an identity comparator from the 74FCT logic family. It compares two 8-bit words and outputs a match signal, used in address decoding, bus arbitration, and system monitoring where a quick equality check is needed. The part is marked as RoHS non-compliant, so it is intended for legacy or military-grade builds that accept tin-lead solder.
74FCT521ASCX Identity Comparator, Active, Bulk Package
MPN74FCT521ASCX
End of Life
74FCT521ASCX, 74FCT series, Identity Comparator, Bulk package, Active lifecycle, RoHS non-compliant.
$0.64Ref. price · indicative, final on quote
RoHSRoHS non-compliant
Series*
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Specifications
| Parameter | Value |
|---|---|
| Series | * |
| Package | Bulk |
Product details
Frequently asked questions
What is the cross reference for 74FCT521ASCX?
A functional peer is the 54F521DC, which is also an identity comparator. Verify pin compatibility and package differences before substituting.
Is 74FCT521ASCX RoHS compliant?
No, the 74FCT521ASCX is RoHS non-compliant, meaning it uses tin-lead solder and is not suitable for lead-free assembly processes.