Counterfeit and defect prevention
Visual and packaging inspection
Electrical performance verification
0.0 / 5.0
- (0 Ratings)
MPQ6842
Electronics Part Number
MPQ6842-WXManufacturer
Microchip Technology
MPQ6842
Description
Low Power Small-Signal Bipolar TransistorInventory
385 Pcs New Original In Stock
14-PDIP complementary transistor array; 30V, 200mA, 350MHz, 500mW; very high speed; for signal distribution and high-frequency switching.
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
Warranty & Returns
How to Order
Shipping & Delivery
Quality Assurance
365 - Day Quality Guarantee - Every part fully backed.
90 - Day Refund or Exchange - Defective parts? No hassle.
Limited Stock, Order Now - Get reliable parts without worry.
Global Shipping & Secure Packaging
Worldwide Delivery in 3-5 Business Days
100% ESD Anti-Static Packaging
Real-Time Tracking for Every Order
Secure & Flexible Payment
Credit Card, VISA, MasterCard, PayPal, Western Union, Telegraphic Transfer(T/T) and more
All payments encrypted for security
RFQ (Request for Quotations)
Submit your RFQ directly on the product detail page or the RFQ page.
Our sales team will respond within 24 hours.
Payment method
PayPal (recommended for new customers)
Credit Cards
Wire Transfer (T/T) – Available in USD, EUR, HKD, and other currencies.
Important Notice
You'll receive a confirmation email after submitting an RFQ.
Didn't get it? Check your spam folder and whitelist Info@WINSURE-Electronics.com
Prices and stock may change; we'll reconfirm your order.
Questions? Contact us anytime.
Freight
Basic cost: USD 70.00
Actual cost may vary depending on weight and destination
Shipping method
Shipped from Hong Kong via FedEx/DHL/UPS/TNT
Delivery Time
In-stock items: Ready to ship in 1-2 days
Transit time: 3-5 business days (FedEx/DHL/UPS)
Special requests? Contact us: Info@WINSURE-Electronics.com
Quantity
Minimum 1
Minimum 1
(*) (*) is mandatory
We'll get back to you within 24 hours
Technical Specifications
Category
Specialized ICs
Manufacturer
Microchip Technology
Packaging
-
Mounting Type
Surface Mount
Package / Case
128-BFQFP
Series
-
Part Status
Obsolete
Base Product Number
KS8842
Type
10/100 Integrated Switch
Applications
Industrial
Supplier Device Package
128-PQFP (14x20)
DiGi-Electronics Programmable
Not Verified
Data Sheet Document (D)
Datasheets
Download KS8842-16MQL Product Specification (PDF)
HTML Datasheet
KS8842-16MQL-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
3 (168 Hours)
REACH Status
REACH Unaffected
ECCN
5A991B1
HTSUS
8542.39.0060
Additional Information
Other Names
576-1458
Standard Package
66
Reviews
0.0/5.0-(Show up to 5 Ratings)
No reviews yet
Publish Evalution
Evalution Message
Please enter your review message.
Please post honest comments and do not post ilegal comments.
Frequently Asked Questions (FAQ)
What are the key risks when designing in the KS8842-16MQL for an industrial Ethernet switch, given i
Designing with the KS8842-16MQL carries significant long-term supply and reliability risks due to its obsolete status—Microchip no longer supports new designs with this part. Combined with its Moisture Sensitivity Level 3 (168-hour floor life), improper handling during PCB assembly can lead to popcorning or latent failures in high-humidity industrial environments. We recommend implementing strict bake-and-store protocols for bare ICs and transitioning to the pin-compatible KSZ8842-16MQL, which is actively supported and offers improved ESD protection and lower power consumption.
Can the KS8842-16MQL be safely replaced with the KSZ8842-16MQL in an existing industrial control sys
Yes, the KSZ8842-16MQL is a direct drop-in replacement for the KS8842-16MQL in most applications, sharing the same 128-PQFP (14x20) package, pinout, and basic register map. However, subtle differences in internal PHY calibration timing and auto-negotiation behavior may require firmware validation—especially in systems relying on deterministic link-up times. Always re-test EMI performance and thermal dissipation under full load, as the KSZ variant uses a more advanced process node that can alter high-frequency noise profiles.
How does the KS8842-16MQL’s lack of integrated magnetics impact PCB layout and signal integrity in c
Since the KS8842-16MQL requires external magnetics (e.g., HX5008NL or similar), designers must carefully manage differential pair routing from the IC to the RJ45 connector. Improper impedance control (target 100 Ω ±10%) or excessive length mismatches (>5 mm) can cause signal reflections, reducing eye diagram margin and increasing BER in electrically noisy factory environments. Use ground stitching vias near the magnetics module and avoid routing high-speed traces over split planes to maintain return path continuity.
What thermal management considerations apply when using the KS8842-16MQL in an enclosed industrial e
The KS8842-16MQL can dissipate up to 1.2 W under full 10/100 Mbps traffic with all ports active, which may cause junction temperatures to exceed 100°C in sealed enclosures. Without forced airflow, rely on a solid ground plane beneath the 128-PQFP package as a heat spreader and consider adding thermal vias to an internal copper layer. Monitor ambient temperature closely—if exceeding 70°C, derate performance or migrate to the KSZ8842-16MQL, which operates 15–20°C cooler due to process improvements.
Is the KS8842-16MQL suitable for mission-critical industrial networks requiring long-term firmware s
No—the KS8842-16MQL is not recommended for new mission-critical designs targeting IEC 61850-3 compliance due to its obsolete status and lack of ongoing firmware/security updates. While it meets basic EMI/EMC thresholds, long-term reliability cannot be guaranteed without vendor support. For substation automation or protective relaying, use the KSZ8842-16MQL instead, which includes enhanced surge protection, better jitter performance, and full documentation for functional safety assessments under IEC 61850-3.
What are the key risks when designing in the KS8842-16MQL for an industrial Ethernet switch, given i
Designing with the KS8842-16MQL carries significant long-term supply and reliability risks due to its obsolete status—Microchip no longer supports new designs with this part. Combined with its Moisture Sensitivity Level 3 (168-hour floor life), improper handling during PCB assembly can lead to popcorning or latent failures in high-humidity industrial environments. We recommend implementing strict bake-and-store protocols for bare ICs and transitioning to the pin-compatible KSZ8842-16MQL, which is actively supported and offers improved ESD protection and lower power consumption.
Can the KS8842-16MQL be safely replaced with the KSZ8842-16MQL in an existing industrial control sys
Yes, the KSZ8842-16MQL is a direct drop-in replacement for the KS8842-16MQL in most applications, sharing the same 128-PQFP (14x20) package, pinout, and basic register map. However, subtle differences in internal PHY calibration timing and auto-negotiation behavior may require firmware validation—especially in systems relying on deterministic link-up times. Always re-test EMI performance and thermal dissipation under full load, as the KSZ variant uses a more advanced process node that can alter high-frequency noise profiles.
How does the KS8842-16MQL’s lack of integrated magnetics impact PCB layout and signal integrity in c
Since the KS8842-16MQL requires external magnetics (e.g., HX5008NL or similar), designers must carefully manage differential pair routing from the IC to the RJ45 connector. Improper impedance control (target 100 Ω ±10%) or excessive length mismatches (>5 mm) can cause signal reflections, reducing eye diagram margin and increasing BER in electrically noisy factory environments. Use ground stitching vias near the magnetics module and avoid routing high-speed traces over split planes to maintain return path continuity.
What thermal management considerations apply when using the KS8842-16MQL in an enclosed industrial e
The KS8842-16MQL can dissipate up to 1.2 W under full 10/100 Mbps traffic with all ports active, which may cause junction temperatures to exceed 100°C in sealed enclosures. Without forced airflow, rely on a solid ground plane beneath the 128-PQFP package as a heat spreader and consider adding thermal vias to an internal copper layer. Monitor ambient temperature closely—if exceeding 70°C, derate performance or migrate to the KSZ8842-16MQL, which operates 15–20°C cooler due to process improvements.
Is the KS8842-16MQL suitable for mission-critical industrial networks requiring long-term firmware s
No—the KS8842-16MQL is not recommended for new mission-critical designs targeting IEC 61850-3 compliance due to its obsolete status and lack of ongoing firmware/security updates. While it meets basic EMI/EMC thresholds, long-term reliability cannot be guaranteed without vendor support. For substation automation or protective relaying, use the KSZ8842-16MQL instead, which includes enhanced surge protection, better jitter performance, and full documentation for functional safety assessments under IEC 61850-3.
Quality Assurance (QC)
WINSURE ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
Sep 15 2026
