BCM5221KPB - 10/100 Ethernet Transceiver | Broadcom
MPN: BCM5221KPB ✓ Active| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
BCM5221KPB Overview
What is an Ethernet transceiver? An Ethernet transceiver is an interface IC that converts digital data into physical network signals and converts received signals back into digital data. A 10/100BASE-TX/FX mini-PHY sits below the Ethernet MAC and handles the physical encoding, clocking, signal conditioning, and link-related functions required for 10 Mb/s and 100 Mb/s networks. It belongs to the interface-IC hierarchy: Ethernet interface transceiver, physical-layer device, network-interface IC, and semiconductor.
The BCM5221KPB is identified in the supplied data as a Broadcom 10/100BASE-TX/FX mini-PHY transceiver. The verified source list includes an official Broadcom PDF and distributor listings from DigiKey, Mouser, Octopart, Win Source, and other suppliers. The package is identified by the Partstack result as a square 64-terminal BGA with a ball terminal form and industrial temperature grade. Exact pin assignments, electrical limits, media interfaces, clocking modes, and register details remain tied to the manufacturer data sheet.
Typical uses include embedded Ethernet equipment, industrial controllers, network adapters, telecom access equipment, and systems requiring a compact copper/fiber physical-layer interface. In a copper link, the device connects the Ethernet MAC-side digital interface to the transformer-coupled 10/100BASE-TX network. In a fiber-oriented implementation, the FX capability can support the appropriate optical-module interface, subject to the detailed application requirements in the Broadcom data sheet. Its industrial-grade identification makes it more relevant to equipment operating outside consumer-only temperature ranges, although exact temperature limits must be taken from the manufacturer documentation.
Designers should verify the package land pattern, ball assignments, decoupling requirements, media-side components, and supported operating modes directly against the Broadcom data sheet. PCB layout is especially important for high-speed physical-layer signals; controlled impedance, short return paths, uninterrupted reference planes, and careful isolation between transmit and receive paths can reduce signal-integrity risk. Do not infer pin compatibility or substitute parts from package similarity alone.
This product page combines the verified source URLs, practical interface-transceiver context, and explicit data gaps. It does not invent missing electrical values, pricing, pin names, or alternative cross-references that were not present in the supplied evidence.
Drop-in alternatives for BCM5221KPB — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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BCM5221KPB
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View Datasheet →DP83822IRHBR
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BCM5221KPB Maximum Ratings & Electrical Characteristics
| Product Type | 10/100BASE-TX/FX mini-PHY Ethernet transceiver |
| Ethernet Speed | 10/100 Mb/s |
| Transceiver Configuration | 1/1 transceiver |
| Interface Category | Integrated circuit interface transceiver |
| Media Support | 10/100BASE-TX/FX |
| Package Type | 64-terminal BGA |
| Terminal Count | 64 terminals |
| Terminal Form | Ball |
| Package Shape | Square |
| Temperature Grade | Industrial |
| Manufacturer | Broadcom Limited |
| Datasheet Description | 10/100BASE-TX/FX mini-PHY transceiver |
BCM5221KPB square Pin Configuration Guide
Pin configuration for BCM5221KPB (square package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for BCM5221KPB.
Refer to the datasheet for full pin configuration.
Typical Applications
BCM5221KPB is suitable for 6 applications: Embedded Industrial Ethernet Controller, 10/100 Mb/s Network Adapter, Industrial Control and Telemetry Equipment, Telecom Access Equipment, Fiber-Capable Network Interface, Compact Embedded Gateway.
Embedded Industrial Ethernet Controller
BCM5221KPB fits an embedded controller that needs a compact 10/100 Mb/s Ethernet physical-layer interface alongside a host MAC or network processor. Its verified identity as a 10/100BASE-TX/FX mini-PHY and 64-terminal BGA package makes it suitable for space-constrained industrial equipment, but the board must follow the exact Broadcom ball map and reference layout. The principal design consideration is ensuring that the MAC-side timing, management signals, and media-side network path meet the data-sheet timing and layout requirements.
Recommended
10/100 Mb/s Network Adapter
The BCM5221KPB can serve as the physical-layer component in a compact Fast Ethernet adapter designed to connect a digital controller to a 10/100BASE-TX network. The 10/100 Mb/s capability supports legacy and transitional Ethernet links without requiring a gigabit-class PHY. Because the supplied data does not include exact voltage, timing, or pin assignments, the adapter schematic and PCB must be derived from the official Broadcom data sheet rather than from the distributor category listing.
Recommended
Industrial Control and Telemetry Equipment
BCM5221KPB is a reasonable candidate for industrial control, telemetry, and remote-monitoring equipment requiring a 10/100 Mb/s Ethernet physical layer. The verified Partstack record identifies the device as industrial temperature grade, which helps distinguish it from consumer-oriented interface parts for equipment design planning. The final qualification still requires checking the manufacturer-defined operating-temperature limits, EMC requirements, and environmental test expectations before production release.
Recommended
Telecom Access Equipment
The BCM5221KPB can be evaluated for telecom-access or line-card equipment where a compact 10/100BASE-TX/FX physical interface is needed. Its mini-PHY format may help reduce board area compared with larger discrete interface implementations, while the FX designation provides a path for evaluating fiber-oriented links. The design should account for the exact media-side connection requirements, isolation strategy, reference clock, and compliance obligations defined in the Broadcom documentation.
Recommended
Fiber-Capable Network Interface
BCM5221KPB is suitable for preliminary evaluation in a network interface that combines 10/100BASE-TX copper support with FX capability. In such a design, the PHY may be paired with the appropriate optical module or media interface, but the supplied evidence does not identify a specific supported optical-module electrical interface. Engineers should therefore use the manufacturer data sheet to confirm signal levels, termination, isolation, and application topology before selecting external fiber components.
Recommended
Compact Embedded Gateway
The BCM5221KPB can be considered for a compact embedded gateway that needs a dedicated 10/100 Mb/s Ethernet physical layer while other processing and connectivity functions are integrated elsewhere. The 64-ball BGA construction supports dense board designs but requires careful ball-to-pad mapping and assembly planning. Because the exact pinout, package dimensions, and thermal data are not included in the supplied text, the gateway layout should not be released until those values are cross-checked against the official Broadcom PDF.
Recommended
Recommended Products Summary
Engineering reference data for BCM5221KPB — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | BCM5221KPB | DP83822IRHBR |
|---|---|---|---|
| Brand | Broadcom | Broadcom | Texas Instruments |
Key Differentiators
- Broadcom 10/100BASE-TX/FX mini-PHY identity (vs DP83822IRHBR)
- Verified 64-terminal BGA package identity (vs DP83822IRHBR)
- Industrial temperature-grade positioning (vs DP83822IRHBR)
- Manufacturer-specific documentation (vs DP83822IRHBR)
Design Notes
Use the Broadcom BCM5221 data sheet as the controlling reference for the 64-ball package land pattern, ball numbering, and reference layout. Keep the media-side traces short and route sensitive physical-layer signals over continuous reference planes. Do not derive the footprint from the generic term “64-terminal BGA”; verify ball locations, pad dimensions, solder-mask rules, and assembly tolerances before releasing the PCB.
Physical-layer traces require controlled impedance and careful return-path continuity. Keep transmit and receive routing separated where the reference design specifies it, avoid long stubs, and minimize discontinuities. For copper links, validate the transformer, jack, termination, and magnetics placement against the Broadcom application guidance; for FX links, confirm the supported electrical interface and external optical-module requirements before layout signoff.
Do not assume a regulator value or decoupling network from distributor classifications. Use the exact supply-voltage limits, recommended capacitors, sequencing requirements, and power-consumption figures in the Broadcom data sheet. Confirm that the selected Ethernet magnetics and external components remain compatible with the PHY's supply and signal levels, and verify thermal margin at the highest expected traffic and environmental temperature.
The verified search results identify BCM5221KPB as a Broadcom 10/100BASE-TX/FX mini-PHY in a 64-terminal BGA, but they do not provide the full pinout or electrical limits. Avoid treating distributor snippets as a substitute for the manufacturer data sheet. Before schematic or firmware release, verify pin names, strap settings, reference-clock requirements, management registers, low-power behavior, and energy-detect functions directly in the official PDF.
Compliance Information
The supplied snippets do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-mineral status. The industrial temperature grade in the Partstack result is an environmental classification, not evidence of AEC-Q100 qualification.
