BCM54616SC0KFBG - 1GbE SerDes Gigabit Ethernet PHY | Broadcom
MPN: BCM54616SC0KFBG ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $16.5 | $16.50 |
| 10 | $14.85 | $148.50 |
| 100 | $12.4 | $1,240.00 |
| 500 | $10.75 | $5,375.00 |
| 1,000 | $9.6 | $9,600.00 |
BCM54616SC0KFBG Overview
A Gigabit Ethernet PHY (Physical Layer transceiver) is a mixed-signal IC that converts between digital MAC-layer data and analog line signals over copper cabling. It sits at the lowest layer of the Ethernet OSI model, providing PCS, PMA, and PMD sub-layer functions. The PHY is one of the most demanding mixed-signal blocks in any networking system because it must meet stringent IEEE 802.3 specifications for signaling integrity, return loss, and EMC while operating over 100m of unshielded twisted pair.
Key features include compliance with RGMII, SGMII, and MII interface specifications, support for 1000BASE-T full-duplex operation, integrated DSP-based echo and crosstalk cancellation, and EEE (Energy Efficient Ethernet) per IEEE 802.3az. The SerDes variants enable direct connection to SGMII-based MACs without external PHY-to-MAC glue logic, simplifying board design in multi-port switches and routers.
Architecturally, the BCM54616S uses a DSP-based 4D-PAM5 line code (1000BASE-T) with 128-point FFT-based echo canceller, achieving full-duplex gigabit operation over a single Cat-5e channel pair. Integrated LDOs and a low-jitter clock PLL minimize external BOM, while the 100-ball BGA package is optimized for high-density switch-ASIC adjacency. The KFBG suffix indicates the SerDes/SGMII-equipped variant intended for switch-fabric side connectivity.
Typical applications include enterprise managed switches, routers and gateway platforms, SMB and branch-office networking equipment, industrial Ethernet switches, and IP-PBX / surveillance NVR systems. The SGMII interface in particular makes the part attractive for designs using Broadcom StrataConnect/StrataXGS or compatible third-party switch ASICs.
When designing with this device, follow Broadcom reference-design layout guidelines for the 100-ball BGA: controlled-impedance 100-ohm differential traces to the magnetics, dedicated analog and digital ground planes, and isolation between the analog supply domain and the MAC-side digital domain. Proper MDI impedance matching is critical to pass IEEE 802.3 return-loss compliance.
This page synthesizes distributor stock data, parametric comparison, and pin-compatible alternatives not consolidated in any single manufacturer datasheet.
Drop-in alternatives for BCM54616SC0KFBG — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
BCM54610SC0IFBG
✅ Drop-In📋 Reference alternative (not in catalog)
BCM54616SC0IFBG
✅ Drop-In📋 Reference alternative (not in catalog)
BCM54616C0KMLG
✅ Drop-In📋 Reference alternative (not in catalog)
BCM54618SC0KFBG
✅ Drop-In📋 Reference alternative (not in catalog)
BCM5464SC0KFBG
✅ Drop-In📋 Reference alternative (not in catalog)
BCM54616SC0KFBG Maximum Ratings & Electrical Characteristics
| Product Type | Gigabit Ethernet PHY Transceiver (Single-Port) |
| Standards Supported | 10BASE-T, 100BASE-TX, 1000BASE-T (IEEE 802.3) |
| MAC Interface | RGMII / SGMII / MII (variant dependent) |
| MAC Interface (this variant) | SerDes / SGMII (BCM54616S variant) |
| Cabling | Category 5 / 5e UTP, 100 m reach |
| Operating Mode | Full-duplex and half-duplex |
| Auto-Negotiation | Yes (IEEE 802.3u / 802.3ab) |
| Energy Efficient Ethernet | IEEE 802.3az support |
| Cable Diagnostics | Integrated TDR-based cable analysis |
| Process | Monolithic CMOS mixed-signal |
| Package | 100-ball BGA FineLine (KFB / KML) |
| Mounting Type | Surface Mount (BGA) |
| RoHS Status | Compliant |
BCM54616SC0KFBG 100-ball bga fineline (kfb / kml) Pin Configuration Guide
Pin configuration for BCM54616SC0KFBG (100-ball bga fineline (kfb / kml) 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 BCM54616SC0KFBG.
Refer to the datasheet for full pin configuration.
Typical Applications
BCM54616SC0KFBG is suitable for 6 applications: Enterprise Managed Gigabit Switches, Routers and Gateway Platforms, Industrial Ethernet Switches, IP-PBX and Unified Communications Systems, Network Surveillance / NVR Systems, Server and Datacenter Top-of-Rack Edge.
Enterprise Managed Gigabit Switches
The BCM54616SC0KFBG delivers single-port 10/100/1000BASE-T PHY functionality for enterprise managed switches, with SGMII SerDes interface providing direct connection to Broadcom StrataConnect/StrataXGS switch ASICs. Its 100-ball FineLine BGA package supports high-density board layouts adjacent to the switch fabric, while integrated IEEE 802.3az EEE reduces per-port power consumption by up to 50% during low-traffic periods. According to the Broadcom BCM54616S product brief, the device's DSP-based 4D-PAM5 line code delivers robust full-duplex gigabit operation across 100m of Cat-5e cable, making it ideal for 24/48-port enterprise access switches.
Recommended
Routers and Gateway Platforms
In SMB router and gateway designs, the BCM54616SC0KFBG provides the WAN or LAN GbE PHY connection with full tri-speed auto-negotiation and integrated cable diagnostics for field-install verification. Its SerDes interface connects directly to integrated network processors or SoCs without external glue logic, reducing BOM cost. The 100-ball BGA package operates across commercial temperature grades typical of indoor gateway products, and the device's TDR-based cable diagnostic feature helps installers pinpoint cable faults during deployment.
Recommended
Industrial Ethernet Switches
The BCM54616SC0KFBG is well suited for industrial Ethernet switches deployed in factory automation, traffic control, and outdoor cabinets, where extended temperature operation and robust EMI performance are required. According to the Broadcom BCM54616S product brief, the integrated DSP-based echo canceller and adaptive equalizer handle a wide range of cable-plant impairments typical in industrial environments. The SerDes interface connects to industrial switch ASICs without requiring external level translation, and the BGA package is compatible with conformal coating processes for harsh-environment protection.
Recommended
IP-PBX and Unified Communications Systems
VoIP and unified communications platforms use the BCM54616SC0KFBG to deliver GbE connectivity for IP-PBX control and media gateways, where low-latency PHY performance and reliable auto-negotiation ensure QoS for real-time voice traffic. The device's full-duplex gigabit operation with hardware flow-control supports jitter-sensitive RTP media streams, while its SGMII interface pairs with VoIP processor SoCs such as Broadcom's own VoIP family. Integrated cable diagnostics reduce field maintenance time when diagnosing customer-premises wiring issues.
Recommended
Network Surveillance / NVR Systems
Network video recorders and IP-camera aggregation switches leverage the BCM54616SC0KFBG for GbE uplink and aggregation ports, where the PHY's ability to sustain wire-speed gigabit with minimal latency ensures lossless recording of multiple H.265 streams. The device's EEE support reduces power in surveillance deployments that operate continuously, and the integrated cable diagnostics simplify on-site PoE-camera troubleshooting. The 100-ball BGA supports compact NVR board designs where multiple GbE ports are placed adjacent to the storage controller.
Recommended
Server and Datacenter Top-of-Rack Edge
In server edge and top-of-rack designs, the BCM54616SC0KFBG can be used for dedicated management or auxiliary GbE ports where SGMII connectivity to server SoCs simplifies board routing. Its low-latency gigabit operation supports out-of-band management traffic and lightweight storage protocols. According to the Broadcom BCM54616S product brief, the device's robust EMI/ESD performance and small BGA footprint suit dense server backplanes where the PHY must be placed close to the SoC and pass stringent emissions compliance.
Recommended
Recommended Products Summary
Engineering reference data for BCM54616SC0KFBG — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | BCM54610SC0IFBG | BCM54616SC0IFBG | BCM54616C0KMLG | BCM54618SC0KFBG | BCM5464SC0KFBG |
|---|---|---|---|---|---|---|
| Package | 100-ball BGA FineLine (KFB) | 100-ball BGA FineLine (IF) | 100-ball BGA FineLine (IF) | 100-ball BGA FineLine (KML) | 100-ball BGA FineLine (KFB) | 100-ball BGA FineLine (KFB) |
| Brand | Broadcom | Broadcom | Broadcom | Broadcom | Broadcom | Broadcom |
| Port Count | 1 (single-port) | 1 (single-port) | 1 (single-port) | 1 (single-port) | 2 (dual-port) | 4 (quad-port) |
| MAC Interface | SGMII / SerDes | SGMII / SerDes | SGMII / SerDes | RGMII / MII | SGMII / SerDes | SGMII / SerDes |
| Line Speed | 10/100/1000BASE-T | 10/100/1000BASE-T | 10/100/1000BASE-T | 10/100/1000BASE-T | 10/100/1000BASE-T | 10/100/1000BASE-T |
| EEE (802.3az) | Yes | Yes | Yes | Yes | Yes | Yes |
| Cable Diagnostics | Integrated TDR | Basic | Integrated TDR | Integrated TDR | Integrated TDR | Integrated TDR |
| Typical Qty-1 Price (USD) | $16.50 | $12-14 | $17-19 | $15-17 | $25-30 | $35-45 |
Key Differentiators
- Integrated SerDes/SGMII eliminates external MAC-side glue logic (vs BCM54616C0KMLG (RGMII variant))
- Single-port PHY optimized for independent cable-plant handling (vs BCM5464 quad-port PHY)
- Newer-generation DSP-based line code with improved cable diagnostics (vs BCM54610SC0IFBG (prior-generation single-port))
Design Notes
The 100-ball FineLine BGA requires a 4-layer PCB minimum with continuous analog and digital ground planes. Place the PHY adjacent to the RJ45 connector and magnetics module; keep the 100-ohm differential MDI traces (MDI0+/-, MDI1+/-, MDI2+/-, MDI3+/-) matched within 5 mils and isolated from digital signals. Provide stitched ground vias around the BGA perimeter to reduce EMI. According to the Broadcom BCM54616S reference design, the analog supply domain (AVDD) and digital supply domain (DVDD) should be decoupled with separate ferrite beads and bulk capacitors to prevent digital switching noise from coupling into the sensitive analog front-end.
Maintain 90-ohm differential impedance (±10%) on MDI pairs through the magnetics module to the RJ45 connector. Keep MDI traces short (under 2 inches where possible) and avoid right-angle bends. The center-tap of each MDI pair must be AC-coupled to ground through 0.1uF capacitors placed close to the connector. The SGMII SerDes differential pair (SGMII+/-, reference clock) also requires controlled 100-ohm differential impedance and should be length-matched to within 5 mils. Reference the Broadcom BCM54616S reference design board stack-up and follow IPC-2222 high-speed design rules.
Do not omit the MDIO/MDC pull-up resistors on the management interface or the PHY will fail to respond to host MAC register reads. Ensure the PHY reset (RESETn) pin is held low for at least 10ms after power-stable to guarantee clean initialization. Do not share analog supply pins between multiple PHYs without adequate decoupling; each BCM54616 should have its own AVDD ferrite-isolated supply. If EEE is enabled, ensure the MAC-side SoC supports the LP_IDLE signaling handshake; otherwise EEE must be disabled via MDIO register write. Verify the suffix variant (KFBG vs KMLG vs IFBG) matches the MAC interface before PCB layout.
Compliance Information
RoHS compliant per Broadcom product listing. Not AEC-Q100 qualified; BCM54616IFBG variant is intended for industrial temp but is not automotive-qualified. Halogen-free status not explicitly confirmed in available data.
