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KS8993FL
Microchip Technology
IC 10/100 INTEG SWITCH 128PQFP
1251 Pcs New Original In Stock
10/100 Integrated Switch 128-PQFP (14x20)
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5.0 / 5.0
- (129 Ratings)
KS8993FL
Product Overview
11672848
DiGi Electronics Part Number
KS8993FL-DGManufacturer
Microchip Technology
KS8993FL
Description
IC 10/100 INTEG SWITCH 128PQFPInventory
1251 Pcs New Original In Stock
10/100 Integrated Switch 128-PQFP (14x20)
Quantity
Minimum 1
Minimum 1
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KS8993FL Technical Specifications
Category
Specialized ICs
Packaging
-
Series
-
Product Status
Obsolete
DiGi-Electronics Programmable
Not Verified
Type
10/100 Integrated Switch
Applications
Port Switch/Network Interface
Mounting Type
Surface Mount
Package / Case
128-BFQFP
Supplier Device Package
128-PQFP (14x20)
Base Product Number
KS8993
Datasheet & Documents
HTML Datasheet
KS8993FL-DG
Environmental & Export Classification
RoHS Status
RoHS non-compliant
Moisture Sensitivity Level (MSL)
3 (168 Hours)
REACH Status
REACH Unaffected
ECCN
5A991B1
HTSUS
8542.39.0001
Additional Information
Standard Package
66
Alternative Parts
View DetailsPART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
배송 기한을 정확히 지키고 포장도 정돈되어 있어서 신뢰가 갑니다.
de desembre 02, 2025
商品ページの情報が詳細で、安心して購入の決断ができました。
de desembre 02, 2025
The tracking update notifications are timely, keeping me well-informed.
de desembre 02, 2025
I've purchased multiple times, and each time the quality remains top-notch.
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Frequently Asked Questions (FAQ)
Can I still use the KS8993FL in new designs despite its obsolete status, and what are the key risks I should evaluate before committing to it?
The KS8993FL is officially obsolete from Microchip Technology, meaning it is no longer recommended for new designs and may face future supply chain disruptions. While existing inventory (such as the 1209 pcs listed) may be available short-term, long-term availability is unreliable. Key risks include lack of technical support, potential counterfeit parts in the open market, and no guarantee of future replacements. If you must use it, secure a lifetime buy or qualified second-source agreement and validate authenticity through authorized distributors. Consider migrating to the pin-compatible KSZ8993FL, which is the recommended active replacement with improved power management and RoHS compliance.
What are the critical layout and thermal considerations when designing a PCB with the KS8993FL in a 128-PQFP (14x20) package, especially regarding moisture sensitivity and reflow profiles?
The KS8993FL has a Moisture Sensitivity Level (MSL) of 3, allowing only 168 hours of floor life after dry packing is opened. Exceeding this without proper baking (typically 125°C for 24 hours) risks popcorning during reflow. The 128-PQFP package requires careful thermal pad and via design under the exposed pad to manage heat dissipation, especially under sustained 10/100 traffic loads. Use a symmetric, balanced copper pour and multiple thermal vias to the ground plane to minimize warpage. Follow IPC-7351 guidelines for pad sizing and ensure solder paste stencil thickness is controlled to prevent bridging on fine-pitch leads. Always adhere to Microchip’s recommended reflow profile with a peak temperature of 240–250°C to avoid package delamination.
How does the KS8993FL compare to its substitute, the KSZ8993FL, in terms of power consumption, signal integrity, and long-term reliability in industrial environments?
The KSZ8993FL is the direct successor to the KS8993FL and offers lower power consumption due to advanced power-down modes and reduced leakage current, which improves thermal performance in enclosed systems. Signal integrity is enhanced with better jitter performance and integrated termination resistors, reducing the need for external components. For industrial applications, the KSZ8993FL provides extended temperature range support and improved ESD protection (typically ±8 kV contact discharge vs. ±4 kV on the KS8993FL). While both are functionally similar, the KSZ8993FL is RoHS-compliant and actively supported, making it a more reliable long-term choice despite the KS8993FL’s legacy footprint compatibility.
What design-in risks should I consider when replacing a legacy switch IC with the KS8993FL in an existing system that previously used a different 10/100 switch like the RTL8305SB?
Replacing the RTL8305SB with the KS8993FL introduces several non-obvious risks: the KS8993FL uses a different register map and lacks integrated PHY auto-negotiation override features present in the RTL8305SB, requiring firmware changes to manage link control. Additionally, the KS8993FL’s MDI/MDIX handling is less aggressive in crossover detection, which may cause link-up issues in non-standard cabling environments. The power sequencing requirements also differ—the KS8993FL is sensitive to VDDIO ramp timing, and improper sequencing can latch-up internal logic. Always validate signal integrity on RMII/MII interfaces and update driver code to reflect the KS8993FL’s interrupt handling model to avoid missed link status events.
Is the KS8993FL suitable for use in automotive or harsh-environment applications, and what derating or qualification steps are necessary to ensure reliability?
The KS8993FL is not rated for automotive use (AEC-Q100) and lacks qualification for extended temperature ranges beyond commercial limits (0°C to 70°C typical). In harsh environments, thermal cycling and humidity can accelerate failure due to the non-RoHS, leaded solder system and MSL 3 sensitivity. If deployment in industrial or near-automotive settings is unavoidable, implement conformal coating to mitigate moisture ingress, derate power by 20% to reduce junction temperature, and conduct extended burn-in testing (1,000+ hours at max ambient) to screen for early-life failures. However, for mission-critical or high-reliability systems, transition to the KSZ8993FL or a qualified automotive Ethernet switch like the LAN8770 is strongly advised.
Quality Assurance (QC)
DiGi 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.
KS8993FL CAD Models
Microchip Technology KS8993FL PCB symbols & footprints
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