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NET2890REV2B-LF
Broadcom Limited
IC INTERFACE SPECIALIZED USB
1651 Pcs New Original In Stock
Interface
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(Ships tomorrow)
*Quantity
Minimum 1
Minimum 1
5.0 / 5.0
- (242 Ratings)
NET2890REV2B-LF
Product Overview
6435359
DiGi Electronics Part Number
NET2890REV2B-LF-DGManufacturer
Broadcom Limited
NET2890REV2B-LF
Description
IC INTERFACE SPECIALIZED USBInventory
1651 Pcs New Original In Stock
Interface
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
Warranty & Returns
How to Order
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NET2890REV2B-LF Technical Specifications
Category
Interface, Specialized
Packaging
-
Series
*
Product Status
Obsolete
Datasheet & Documents
HTML Datasheet
NET2890REV2B-LF-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
REACH Status
REACH Unaffected
ECCN
OBSOLETE
HTSUS
0000.00.0000
Additional Information
Standard Package
2,500
Reviews
5.0/5.0-(Show up to 5 Ratings)
December 02, 2025
Choosing DiGi Electronics means getting dependable products at a fair price.
December 02, 2025
With DiGi Electronics, I get great performance without breaking the bank or worrying about reliability.
December 02, 2025
The overall quality of their electronics components is top-notch, with consistent performance.
December 02, 2025
The after-sales service resolves issues quickly, making me a loyal customer.
December 02, 2025
The entire delivery process was transparent, with timely updates at every stage.
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Frequently Asked Questions (FAQ)
Can the NET2890REV2B-LF be used as a drop-in replacement for the MAX3421E in a full-speed USB host design, and what compatibility risks should I expect?
The NET2890REV2B-LF is not a direct drop-in replacement for the MAX3421E due to differences in SPI register mapping, power sequencing, and interrupt handling. While both support full-speed USB host functionality, the NET2890REV2B-LF requires a dedicated microcontroller with firmware tailored to Broadcom's proprietary interface protocol. Key risks include firmware incompatibility and lack of built-in USB transceivers requiring external components. Always verify timing specs and signal level compatibility on control lines such as /RESET and INTx to avoid communication failures during integration.
What design-in risks should I consider when selecting the NET2890REV2B-LF for a new product given its obsolete status?
Using the NET2890REV2B-LF in new designs carries significant supply chain and lifecycle risks due to its obsolete status. While 1,585 units are available now, long-term availability is not guaranteed, which can disrupt production and increase obsolescence management costs. Consider implementing a last-time buy strategy and evaluate functionally similar alternatives like the Microchip USB2512B or designing with pin- and register-compatible successors if available. Ensure you have access to legacy documentation and test firmware to mitigate integration challenges.
How does the lack of integrated USB transceivers in the NET2890REV2B-LF impact PCB layout and signal integrity in high-noise environments?
The NET2890REV2B-LF requires external USB transceivers, which increases component count and PCB complexity. This introduces potential signal integrity risks on D+ and D- lines, especially in electrically noisy environments. To mitigate reflections and EMI, implement controlled impedance routing (90Ω differential), minimize trace length to ≤ 2 inches, and include series termination resistors (22–33Ω) close to the transceiver. Use a solid ground plane and avoid routing under the crystal oscillator to prevent coupling that could disrupt USB communication.
What are the critical power sequencing requirements for the NET2890REV2B-LF to ensure reliable USB enumeration?
The NET2890REV2B-LF requires careful power sequencing to ensure reliable operation: apply core voltage (VDDIO) before VDDA and ensure all supplies stabilize within 100ms before releasing the /RESET signal. Improper sequencing can cause incorrect register initialization or failure to enumerate on the USB bus. Use a supervisory IC with adjustable delay to manage reset timing, and include bypass capacitors (100nF + 10μF) at each supply pin to handle transient current during USB connect events.
When replacing a failing NET2890REV2B-LF in an existing design, how can I verify that the socketed replacement is authentic and not a counterfeit or relabeled part?
To verify authenticity of a replacement NET2890REV2B-LF, inspect the marking laser code, date code alignment, and package finish under magnification for inconsistencies typical of remarked or recycled ICs. Cross-check the date code against known production periods from Broadcom documentation. Use electrical validation including register readback through the SPI interface and verify correct device ID responses. For high-reliability applications, source only from franchised distributors or authorized brokers to avoid counterfeit units that may fail prematurely under thermal or electrical stress.
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.
NET2890REV2B-LF CAD Models
Broadcom Limited NET2890REV2B-LF PCB symbols & footprints
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