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QS74FCT521CTSOX

ACTIVE
Quality Semiconductor

Magnitude Comparator Bit Active Low Output A=B

In full production. No end-of-life notice on file.

QS74FCT521CTSOX is a Magnitude Comparator Bit Active Low Output A=B from Quality Semiconductor. 1 authorized distributor quotes it on TracedParts, from RM 6.43 at quantity 1, with 5,000 units in stock for immediate despatch. Figures come from the distributors' own APIs, pulled in the catalogue snapshot of 2026-09-25, and are indicative rather than a binding quote.

RoHS COMPLIANTREACH - SMD
BEST PRICE @1
RM 6.43
DigiKey · authorized
TOTAL STOCK
5,000
1 source
SHORTEST LEAD
stock
ships from warehouse
AUTHORIZED
1 / 1
tier 1 sources

Who has QS74FCT521CTSOX in stock, and what does it cost?

1 authorized distributor · pulled from their APIs in the catalogue snapshot of 2026-09-25
QTY pcs
DISTRIBUTOR
STOCK
MOQ
PRICE BREAKS · MYR
LEAD
@250 PCS
TIER 1 - AUTHORIZED DISTRIBUTORfranchised - full warranty - paperwork QA will accept
AUTH
5,000
189
189+6.4276
stock
ex-warehouse
RM 6.4276
RM 1,606.89 total
Buy ↗
What 250 pcs actually costs landed in Malaysia, duty and SST included: RM 1,813.06 RM 7.2523 per unit, DDP · estimate Open estimator →

What are the specifications of QS74FCT521CTSOX?

15 parameters▾
Device specification
TypeIdentity Comparator
Number of Bits8
OutputActive Low
Output FunctionA=B
Voltage - Supply4.75V ~ 5.25V
Ordering & compliance
ManufacturerQuality Semiconductor
CategoryComparators
Package-
MountingSurface mount
LifecycleACTIVE
RoHSCompliant
Moisture levelNot applicable (through hole)
PackagingTape & reel
Country of origin
HS code

Where can I download the QS74FCT521CTSOX datasheet?

link supplied by DigiKey▾
PDF
QS74FCT521CTSOX datasheet
link supplied by DigiKey · Quality Semiconductor · English
Open datasheet ↗

This is the datasheet link the distributor returned with the part record. We pass it through as they gave it, and we have not opened it - there are more than 300,000 of these and we verify only the ones we curate by hand. If it does not resolve, that is the distributor’s record, not the part.

What does QS74FCT521CTSOX cost landed in Malaysia?

Malaysia · DDP · HS ▾
Goods
Freight · express 2 d
Import duty · 0 % (ITA-exempt)
Sales & service tax · 6 %
Customs clearance
Landed total

Estimate only. The correct HS classification for your import is your responsibility - see terms of service.

Is there a CAD symbol and footprint for QS74FCT521CTSOX?

4 downloads▾
SCHEMATIC SYMBOL · .libPCB FOOTPRINT · .kicad_mod 3D MODEL · .stepSPICE · .mod

What can I use instead of QS74FCT521CTSOX?

3 in comparators▾
QS74FCT521CTS0
Quality Semiconductor
Magnitude Comparator Bit Active Low Output A=B…
33,423
RM 6.43
QS74FCT521BTS0
Quality Semiconductor
Magnitude Comparator Bit Active Low Output A=B…
33,423
RM 6.43
QS74FCT521CTS0X
Quality Semiconductor
Magnitude Comparator Bit Active Low Output A=B…
33,423
RM 6.43

Nearest peers by price within the same category. Confirm the parameters before you substitute - these are not guaranteed drop-in replacements.

Which parts are similar to QS74FCT521CTSOX?

8 parts▾
LM393SNGLM339SNGLM2903SNGMIC842NYC5NLV14007UBDR2GM51943AHP#CF0JLMV331M7LM2901SNG

Common questions about QS74FCT521CTSOX

7 questions▾
Is QS74FCT521CTSOX in stock?
Yes. 5,000 units are in stock across 1 authorized distributor (DigiKey), as of the catalogue snapshot of 2026-09-25.
How much does QS74FCT521CTSOX cost?
RM 6.4276 is the lowest unit price on this page, from DigiKey. Prices fall as quantity rises; the full price break ladder is in the quotes table. Figures come from the distributor API and are indicative, not a binding quote.
Who supplies QS74FCT521CTSOX?
DigiKey. It is authorized, franchised distributor quoting through its own API. TracedParts carries no broker or open-market listings.
How old are these prices?
The catalogue is re-pulled from the distributors' APIs once a day, and the line under the Quotes heading says which pull the figures on this page came from. Prices and stock can move between pulls, so treat them as indicative and confirm on the distributor's site before you order.
Who quoted these prices?
Every row on the site comes from an authorized, franchised distributor through its own API: DigiKey, Mouser or element14. There are no broker or open-market listings on TracedParts. If a source ever changes, the row will say so.
Why do you show the source before the price?
Because who sold it decides what happens at incoming inspection, and a table sorted by price alone hides that. Rows are grouped by the distributor's status first and ordered by unit price inside the group.
Why are prices in ringgit?
Distributors quote in US dollars. TracedParts converts to MYR at a fixed reference rate that is printed on the page, not a live FX feed, so the ringgit figure is a sourcing estimate rather than the amount you will be billed.