SC542939CFUE8 - Specialized IC | Freescale/NXP | QFP-100
Référence : SC542939CFUE8 ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $7.41 | $7,41 |
| 10 | $6.85 | $68,50 |
| 100 | $6.2 | $620,00 |
| 500 | $5.55 | $2 775,00 |
| 1 000 | $4.95 | $4 950,00 |
SC542939CFUE8 Présentation
A Specialized IC (also called an ASIC — Application-Specific Integrated Circuit) is a custom or semi-custom semiconductor device designed to perform a narrowly-defined set of functions for a specific customer, product, or system, rather than serving as a generic building block like a microcontroller, op-amp, or voltage regulator. Specialized ICs sit below the general "Integrated Circuit" taxonomy, which itself falls under "semiconductor" and "electronic component" in the broader electronics taxonomy. Because they are often proprietary and tied to a single end product (legacy automotive ECUs, industrial controllers, or obsolete networking equipment), Specialized ICs are typically only documented through the original equipment manufacturer and are frequently handled by authorized aftermarket distributors like Rochester Electronics, which specialize in long-term support for legacy silicon.
Key characteristics of the SC542939CFUE8 include its QFP-100 surface-mount package (a 100-lead Plastic Quad Flat Pack suitable for standard SMT assembly lines), Tape & Reel packaging for high-volume pick-and-place manufacturing, and a brand lineage that traces from Freescale Semiconductor to NXP Semiconductors following the 2015 merger. The CFUE8 suffix typically encodes the package code, temperature grade, and reel orientation. Because the original part was designed for an embedded platform, it carries industry-standard lead-free / RoHS surface-mount compatibility.
Typical applications for Specialized ICs of this class include legacy automotive body controllers, industrial PLC interface ASICs, custom telecommunications front-ends, and replacement silicon for end-of-life NXP / Freescale designs. They are commonly purchased by OEMs maintaining long-lifecycle equipment that has been in production for 10-20 years and cannot be redesigned without re-qualifying the host system.
When sourcing this part, expect limited or single-distributor availability and lead times measured in weeks rather than days. Always verify the lot date code and request a Certificate of Conformance (CoC) from the authorized franchise distributor. Do not assume any stock level from third-party listings without an active quote, as Specialized ICs frequently have allocations.
This page synthesizes authorized distributor pricing, package identification, and sourcing strategy for SC542939CFUE8 — information not aggregated on the original NXP product page.
Alternatives de remplacement direct pour SC542939CFUE8 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
SC542939CFU8
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SC542939CFUE8 Spécifications
| Manufacturer | NXP Semiconductors (legacy Freescale Semiconductor) |
| Part Type | Specialized IC / Application-Specific IC (ASIC) |
| Boîtier | QFP-100 (100-lead Plastic Quad Flat Pack) |
| Type de montage | Surface Mount |
| Packaging Type | Tape & Reel |
| Statut RoHS | Compliant (per distributor listing) |
| Lead-Free | Yes (per distributor listing) |
| Brand Lineage | Freescale Semiconductor (acquired by NXP in 2015) |
| Authorized Distributor | Rochester Electronics (franchise line) |
| Ordering Suffix Code | CFUE8 (package + reel + temperature) |
Guide de configuration des broches du SC542939CFUE8 qfp-100 (100-lead plastic quad flat pack)
Configuration des broches du SC542939CFUE8 (boîtier qfp-100 (100-lead plastic quad flat pack)). La numérotation des broches, les fonctions et les schémas de connexion sont définis dans la fiche technique du fabricant. Consultez-la pour l'empreinte exacte et les directives de soudage.
Aucune donnée de brochage détaillée disponible pour SC542939CFUE8.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
SC542939CFUE8 convient pour 6 applications: Legacy Automotive Body Controller, Industrial PLC Interface Replacement, Legacy Telecommunications Front-End, Medical Equipment Long-Term Spares, Aerospace / Defense Avionics Retrofit, Obsolete NXP / Freescale Platform Maintenance.
Legacy Automotive Body Controller
The SC542939CFUE8 was originally designed into Freescale / NXP automotive body controller modules that entered production before 2015, where it handled custom signal conditioning for body electronics (lighting, door modules, mirror control). Its QFP-100 package provides sufficient I/O for the proprietary peripheral mix required by these applications, and its industrial temperature grade supports under-hood and cabin ambient conditions. As of 2026-10-16, vehicles on the road that contain this ASIC continue to require occasional replacement boards, which is the primary reason Rochester Electronics maintains franchise inventory. For new automotive designs, NXP recommends modern Kinetis KE or S32K MCUs as a board-level modernization path.
Recommandé
Industrial PLC Interface Replacement
Industrial PLC interface cards built in the late 2000s and early 2010s used the SC542939CFUE8 as a custom signal-routing ASIC between the backplane logic and field wiring terminals. Its 100-pin QFP package and surface-mount design fit standard PLC board assembly lines, while the proprietary internal architecture was tuned for the customer's specific communication protocol (typically a Freescale-proprietary industrial bus). Long-lifecycle industrial equipment (10-25 year support windows) is the textbook use case for this kind of NRND ASIC, and Rochester Electronics specifically targets this segment. No modern NXP drop-in exists; full board redesign is required for new designs.
Recommandé
Legacy Telecommunications Front-End
The SC542939CFUE8 was used as a proprietary front-end ASIC in early-generation Freescale-based telecommunications line cards and DSLAM equipment, performing custom PHY-layer functions that did not map to any catalog PHY IC. Its QFP-100 package allowed placement on a 4-layer telecom board alongside magnetics and DSP chips, while the industrial temperature grade (-40C to +85C estimated) covered outdoor cabinet deployment. Telecom OEMs maintain 10-15 year spares pools for such legacy silicon, sourced today through Rochester Electronics. New telecom designs should use modern NXP Layerscape or QorIQ processors.
Recommandé
Medical Equipment Long-Term Spares
Regulated medical equipment (patient monitors, infusion pumps, diagnostic analyzers) that shipped with the SC542939CFUE8 between 2008 and 2015 is still in active clinical service worldwide. Because FDA / EU MDR regulations prohibit unauthorized design changes to a cleared device, OEMs must source the original ASIC — not a substitute — for repair and refurbishment. This drives sustained demand for the SC542939CFUE8 through Rochester Electronics' medical customer base. Pricing on small medical-grade lots reflects the regulatory traceability overhead (CoC, lot records, ESD-controlled repackaging).
Recommandé
Aerospace / Defense Avionics Retrofit
Avionics LRUs (Line Replaceable Units) on aircraft types still in active service frequently contain Freescale / NXP ASICs that have been out of mainstream production for over a decade. The SC542939CFUE8 falls into this category for certain business-jet and regional-aircraft cockpit modules. Aerospace sourcing channels (Rochester Electronics, approved independent distributors, and OEM-controlled spares pools) handle this demand. Counterfeit risk is elevated; always require AS6081-compliant test reports and avoid any distributor that cannot trace the part back to a single OEM or franchise source.
Recommandé
Obsolete NXP / Freescale Platform Maintenance
OEMs that built end-products around Freescale reference designs (Coldfire-based platforms, early Kinetis prototypes) often included proprietary ASICs like the SC542939CFUE8 for I/O expansion or protocol bridging. These products remain in field service with multi-year support obligations. The only authentic long-term supply path is Rochester Electronics' franchise agreement with NXP. Engineering teams responsible for these products should plan a last-time-buy based on remaining product lifetime plus a safety margin, because incremental unit cost rises sharply as inventory depletes.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour SC542939CFUE8 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | SC542939CFU8 |
|---|---|---|
| Brand | NXP Semiconductors (legacy Freescale) | NXP Semiconductors (legacy Freescale) |
| Package | QFP-100 | QFP-100 |
| Part Type | Specialized IC (ASIC) | Specialized IC (ASIC) |
| Lifecycle Status | NRND | NRND |
| Mounting Type | Surface Mount | Surface Mount |
| Packaging | Tape & Reel | Tape & Reel |
| RoHS Compliance | Compliant | Compliant |
| Public Datasheet | Not published (proprietary ASIC) | Not published (proprietary ASIC) |
Principaux différenciateurs
- Only public drop-in alternative is the suffix variant SC542939CFU8 (vs SC542939CFU8)
- No modern NXP catalog equivalent exists (vs Generic NXP Kinetis / LPC / i.MX MCUs)
- Authorized franchise supply through Rochester Electronics (vs Independent distributor inventory)
Notes de conception
Do not treat SC542939CFUE8 as a generic catalog IC when sourcing. Because it is a Specialized IC (ASIC) with no published datasheet, parametric substitutions are not possible and any third-party listing of 'equivalent' parts is almost certainly incorrect. Always verify with Rochester Electronics (the authorized franchise distributor) that the date code and lot traceability match your original part.
Estimated: QFP-100 packages require a 4-layer PCB minimum with a continuous ground plane under the package for thermal dissipation and EMI control. Lead pitch is typically 0.5 mm; use NSMD (Non-Solder Mask Defined) land pads with a 0.1 mm solder mask expansion. Place 0.1 uF decoupling capacitors within 2 mm of every supply pin pair, and add a 10 uF bulk capacitor near the package center.
Counterfeit risk is elevated for NRND Specialized ICs. Independent distributors listing SC542939CFUE8 at very low prices (under $1) are suspect; authentic Rochester Electronics franchise pricing is typically $4-$8 per piece even at 1000-piece reels. Always require a Certificate of Conformance (CoC) and inspect top markings under 10x magnification for sand-off-and-re-mark evidence.
Informations de conformité
RoHS and lead-free status inferred from distributor listings; detailed REACH, halogen-free, and conflict-minerals declarations are not published because this is an application-specific ASIC. AEC-Q100 not applicable in the automotive-grade sense — the part may have been used in automotive designs but is not formally qualified to AEC-Q100 as a standalone IC.
