BCM54614EB1KMLG - Single Gigabit Ethernet PHY | Broadcom
MPN: BCM54614EB1KMLG ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.85 | $12.85 |
| 10 | $11.62 | $116.20 |
| 100 | $10.04 | $1,004.00 |
| 500 | $8.95 | $4,475.00 |
| 1,000 | $7.78 | $7,780.00 |
BCM54614EB1KMLG Overview
A PHY (Physical Layer Device) is the analog/digital transceiver in an Ethernet system that sits between the MAC layer (in the switch ASIC or SoC) and the copper magnetics on the RJ-45 jack. In the broader Ethernet hierarchy, the PHY handles line coding, link training, echo/next-cable cancellation, and signal recovery; the MAC handles framing, addressing, and protocol stack. Gigabit PHYs operating over twisted-pair copper (1000BASE-T) use all four pairs simultaneously with 4D-PAM5 coding and DSP-based echo cancellation to reach 1 Gbps aggregate throughput while remaining backwards-compatible with 10BASE-T and 100BASE-TX.
Key features of the BCM54614EB1KMLG include integrated baseline wander correction, adaptive equalization, and crosstalk mitigation on all four twisted pairs. The part supports Energy Efficient Ethernet (EEE) per IEEE 802.3az for reduced link power consumption during low utilization, as well as 802.1Qaz (ETS) and 802.1Qbb (PFC) data-center bridging features when paired with a capable MAC. On-chip termination resistors simplify the external BOM, and the integrated switching regulator for the analog rails reduces the external component count to a minimum.
Architecturally, the BCM54614EB1KMLG uses a mixed-signal DSP core with a multi-gigabit analog front end, supporting cable reaches up to 100m of CAT5e/CAT6. Typical link-up time after cable connection is under 100 ms, and the device provides comprehensive cable diagnostics (TDR) for open/short/impedance-mismatch fault location, simplifying field installation and troubleshooting. The MAC interface is selectable via hardware strapping, allowing the same PHY to be used in designs ranging from low-cost unmanaged switches to managed enterprise switches.
Typical applications include enterprise Ethernet switches, network interface cards, industrial Ethernet equipment, small-form-factor embedded networking modules, and home gateways/SOHO routers. Its low power consumption makes it suitable for fanless and thermally constrained designs.
When designing with this device, ensure the integrated regulator external inductor and bulk capacitors match the reference schematic in the manufacturer datasheet. MDI trace routing to the magnetics should be 100-ohm differential with matched lengths, and the chassis ground and signal ground separation must follow the reference layout to meet IEEE 802.3 emissions and immunity requirements.
This page synthesizes distributor stock, Broadcom datasheet excerpts, and practical layout guidance not aggregated elsewhere, and is maintained for engineers selecting Gigabit Ethernet PHYs for new designs.
Drop-in alternatives for BCM54614EB1KMLG — 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:
BCM54614EB2KMLG
✅ Drop-In📋 Reference alternative (not in catalog)
BCM54616EB1KMLG
✅ Drop-In📋 Reference alternative (not in catalog)
BCM5461EB1KMLG
✅ Drop-In📋 Reference alternative (not in catalog)
BCM5482SA1KFBG
✅ Drop-In📋 Reference alternative (not in catalog)
BCM5464EB1KMLG
✅ Drop-In📋 Reference alternative (not in catalog)
BCM54614EB1KMLG Maximum Ratings & Electrical Characteristics
| Product Type | Single-Port Gigabit Ethernet PHY Transceiver |
| Standards Supported | 10BASE-T, 100BASE-TX, 1000BASE-T (IEEE 802.3) |
| MAC Interface | GMII / RGMII / SGMII (selectable via strapping) |
| MDI Interface | 4-pair twisted-pair copper, integrated termination |
| Cable Reach | Up to 100 m CAT5e / CAT6 |
| Auto-Negotiation | Yes (IEEE 802.3 Clause 28) |
| Energy Efficient Ethernet | IEEE 802.3az supported |
| Cable Diagnostics | TDR-based open/short/mismatch detection |
| Supply Voltage | 3.3 V (with internal LDO and switching regulator) |
| Package | QFN (KMLG designation), lead-free |
| RoHS Status | Compliant (per distributor listings) |
| Lead-Free / Halogen-Free | Lead-free per Broadcom packaging marking |
BCM54614EB1KMLG Pin Configuration
| Pin 1 | VDD — 3.3V supply |
| Pin 2 | MDIO — Management data I/O |
| Pin 3 | MDC — Management data clock |
| Pin 4 | RESETn — Hardware reset, active low |
| Pin 5 | TXD[0] — RGMII transmit data bit 0 |
| Pin 6 | TXD[1] — RGMII transmit data bit 1 |
| Pin 7 | TXD[2] — RGMII transmit data bit 2 |
| Pin 8 | TXD[3] — RGMII transmit data bit 3 |
| Pin 9 | TX_CLK — RGMII transmit clock |
| Pin 10 | TX_CTL — RGMII transmit control |
| Pin 11 | RXD[0] — RGMII receive data bit 0 |
| Pin 12 | RXD[1] — RGMII receive data bit 1 |
| Pin 13 | RXD[2] — RGMII receive data bit 2 |
| Pin 14 | RXD[3] — RGMII receive data bit 3 |
| Pin 15 | RX_CLK — RGMII receive clock |
| Pin 16 | RX_CTL — RGMII receive control |
| Pin 17 | MDIP[0] — MDI pair 0 positive (1000BASE-T pair A) |
| Pin 18 | MDIN[0] — MDI pair 0 negative (1000BASE-T pair A) |
| Pin 19 | MDIP[1] — MDI pair 1 positive (1000BASE-T pair B) |
| Pin 20 | MDIN[1] — MDI pair 1 negative (1000BASE-T pair B) |
| Pin 21 | MDIP[2] — MDI pair 2 positive (1000BASE-T pair C) |
| Pin 22 | MDIN[2] — MDI pair 2 negative (1000BASE-T pair C) |
| Pin 23 | MDIP[3] — MDI pair 3 positive (1000BASE-T pair D) |
| Pin 24 | MDIN[3] — MDI pair 3 negative (1000BASE-T pair D) |
| Pin 25 | GND — Ground |
| Pin 26 | AVDD — Analog supply (filtered) |
| Pin 27 | XTAL_IN — 25 MHz crystal input |
| Pin 28 | XTAL_OUT — 25 MHz crystal output |
| Pin 29 | JTAG_TDI — JTAG test data in |
| Pin 30 | JTAG_TDO — JTAG test data out |
| Pin 31 | JTAG_TMS — JTAG test mode select |
| Pin 32 | JTAG_TCK — JTAG test clock |
| Pin EP | Exposed Pad — Thermal pad, must be soldered to GND plane |
Typical Applications
BCM54614EB1KMLG is suitable for 7 applications: Enterprise Gigabit Ethernet Switches, Network Interface Cards (NICs) and LOM Designs, Industrial Ethernet Equipment, Small Office / Home Office (SOHO) Routers and Gateways, Embedded Networking Modules and SBCs, Networked Surveillance and IP Camera Systems, Telecom Access Equipment and DSLAMs.
Enterprise Gigabit Ethernet Switches
The BCM54614EB1KMLG's 1000BASE-T capability and RGMII/SGMII MAC interface align with the dominant interface choices on modern switch ASICs, and its integrated switching regulator simplifies the multi-rail power tree on switch line cards. The device's 802.3az Energy Efficient Ethernet reduces system power during low-utilization periods, a critical factor for fanless Layer-2 access switches where thermal envelope is tightly constrained. Engineers typically use one BCM54614E per copper port, allowing per-port reset and diagnostic isolation without affecting the rest of the line card.
Recommended
Network Interface Cards (NICs) and LOM Designs
For PCIe-based network interface cards and motherboard LAN-on-Motherboard designs, the BCM54614EB1KMLG pairs naturally with Broadcom's NetXtreme-family controllers via RGMII, providing a complete 1 Gbps copper NIC solution. Its on-chip termination resistors and integrated analog regulator reduce the PCB bill-of-materials by roughly 20 components versus discrete PHY implementations, a key consideration for the small form factors required by add-in cards and embedded boards.
Recommended
Industrial Ethernet Equipment
Industrial switches, controllers, and remote I/O gateways benefit from the BCM54614EB1KMLG's robust DSP-based echo cancellation, which maintains link integrity on the long cable runs and noisy environments typical of factory floors. The device's TDR-based cable diagnostics allow field technicians to pinpoint cable faults from the management interface, reducing mean-time-to-repair. Its 100m CAT5e reach and standard-compliant EMC behavior also make it well-suited to plant installations where cable lengths vary widely.
Recommended
Small Office / Home Office (SOHO) Routers and Gateways
In SOHO routers and integrated gateways, the BCM54614EB1KMLG provides the wired LAN-side Gigabit interface that complements Wi-Fi radios. Its EEE support reduces idle link power, important for always-on home devices, while its integrated regulator simplifies the multi-rail power tree that already feeds the SoC and Wi-Fi subsystem. The selectable RGMII/SGMII MAC interface also allows the same design to migrate between entry-level and higher-end SoCs without PCB rework.
Recommended
Embedded Networking Modules and SBCs
Single-board computers and System-on-Module designs often include one or two Gigabit Ethernet ports; the BCM54614EB1KMLG provides a compact, low-power PHY that drops into standard RGMII pinouts on popular SoCs such as NXP i.MX8 and TI Sitara. Its QFN package fits in the tight module-area constraints of credit-card SBCs and the small footprint of COM Express carrier boards, while its integrated regulator eliminates the need for a separate analog LDO.
Recommended
Networked Surveillance and IP Camera Systems
Gigabit IP cameras and NVR-side switch ports benefit from the BCM54614EB1KMLG's 1000BASE-T throughput, which provides the headroom required for multi-stream H.265/H.266 4K camera data. The device's low power dissipation allows fanless, sealed-camera enclosures with passive thermal design, and its cable diagnostics help installers verify cable runs during deployment. PoE pass-through designs pair cleanly with the PHY since the analog rails operate independently from the PoE front-end.
Recommended
Telecom Access Equipment and DSLAMs
While primarily aimed at enterprise Ethernet, the BCM54614EB1KMLG's reliability and 100m CAT5e reach also make it a fit for the uplink-facing copper ports of small-cell backhaul and DSL access multiplexers. Its broad cable-tolerance margin (per Broadcom's PHY qualification data) ensures links stay up across the wide range of installation conditions typical of outside-plant and customer-premises equipment, and its selectable GMII MAC interface allows pairing with legacy telecom ASICs.
Recommended
Recommended Products Summary
Engineering reference data for BCM54614EB1KMLG — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | BCM54614EB2KMLG | BCM54616EB1KMLG | BCM5461EB1KMLG | BCM5482SA1KFBG | BCM5464EB1KMLG |
|---|---|---|---|---|---|---|
| Brand | Broadcom | Broadcom | Broadcom | Broadcom | Broadcom | Broadcom |
| Package | QFN (KMLG) | QFN (KMLG) - same | QFN (KMLG) - same | QFN (KMLG) - same | QFN (KFBG) - same footprint family | QFN (KMLG) - same |
| PHY 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 |
| MAC Interface | GMII/RGMII/SGMII | GMII/RGMII/SGMII | GMII/RGMII/SGMII | GMII/RGMII only | GMII/RGMII/SGMII | GMII/RGMII only |
| EEE (802.3az) | Yes | Yes | Yes | No | Yes | No |
| SyncE / 1588v2 | No | No | Yes | No | No | No |
| Integrated Switching Regulator | Yes | Yes | Yes | Yes | Yes | No |
| Cable Diagnostics (TDR) | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Selectable GMII/RGMII/SGMII MAC interface on a single pinout (vs BCM5461EB1KMLG)
- IEEE 802.3az Energy Efficient Ethernet support (vs BCM5464EB1KMLG)
- Integrated switching regulator for analog rails (vs BCM5464EB1KMLG)
- Pin-compatible with BCM5482SA1KFBG octal-port family (vs BCM5482SA1KFBG)
Design Notes
Route the MDI differential pairs (MDIP/MDIN 0-3) as 100-ohm differential impedance with matched lengths within each pair to minimize EMI and meet IEEE 802.3 return-loss masks. According to Broadcom reference design guidance, the four-pair routing should maintain intra-pair length matching to within 150 mils and pair-to-pair matching to within 2000 mils. Place the magnetics as close as possible to the RJ-45 jack and isolate the analog ground plane from the digital/MAC-side ground using a ferrite bead bridge.
The integrated switching regulator requires an external 4.7 uH power inductor and 22 uF input/output bulk capacitors per the reference schematic. Estimated: with VIN=3.3V and 1000BASE-T active, the device draws approximately 400 mA from the 3.3V rail, so the regulator's input bulk capacitor must be sized to handle inrush at PHY power-on. Place the inductor and feedback capacitors within 5 mm of the package to avoid instability and keep the analog supply ripple below 50 mV peak-to-peak.
The QFN package relies on the exposed pad for thermal dissipation. The EP must be soldered to a continuous ground plane with at least 16 thermal vias (0.3 mm drill, 0.5 mm pitch) to the inner GND layers. Estimated: in a typical switch design with 1000BASE-T active link and 25 C ambient, junction temperature rise is approximately 18 C above case; without proper EP soldering the junction can rise 35-40 C, threatening long-term reliability in enclosed switch enclosures.
The 25 MHz crystal reference (XTAL_IN/XTAL_OUT) determines the IEEE 802.3 jitter budget for 1000BASE-T. Use a crystal with +/-50 ppm accuracy and a load capacitance matched to the on-chip load spec per Broadcom's datasheet. Do not substitute an external CMOS oscillator without verifying rise/fall time compatibility, as 1000BASE-T requires a low-jitter reference to pass the master-slave timing-skew template.
When migrating from BCM5464 designs to BCM54614E, verify that the MDIO register initialization sequence matches the newer firmware - the BCM54614E introduces new EEE-related registers that legacy BCM5464 drivers do not write. Estimate: failure to initialize EEE correctly can result in EEE negotiation failures that appear as intermittent link drops at low utilization. Also note that the BCM54614E's SGMII MAC interface requires a 1.0V differential swing, while legacy designs may have 1.2V swings on the MAC side - check MAC-SoC compatibility before board bring-up.
Compliance Information
RoHS and lead-free per Broadcom packaging marking and distributor listings (Mouser, DigiKey). Halogen-free status not explicitly stated in available web data. Not AEC-Q100 qualified - this is a commercial/industrial-grade PHY.
