VSC7422XJG-04 - 25-Port GbE Switch, 12 Cu PHY | Microchip
MPN: VSC7422XJG-04 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $169.7 | $169.70 |
| 10 | $158.4 | $1,584.00 |
| 100 | $142.1 | $14,210.00 |
| 500 | $128.75 | $64,375.00 |
| 1,000 | $116.3 | $116,300.00 |
VSC7422XJG-04 Overview
An Ethernet switch IC such as the VSC7422 sits at the heart of managed and unmanaged enterprise, industrial, and small-business networking gear. As a Layer-2 switch, it forwards Ethernet frames at wire speed, enforces VLAN/QoS policies, learns and ages MAC addresses, and provides traffic-class prioritization. Within the broader component taxonomy, the VSC7422XJG-04 is an integrated Ethernet switch IC, a sub-category of interface ICs, descended from telecom and networking ASICs and ultimately from general-purpose digital semiconductors.
Key features include industrial-grade -40C to +85C operation, 12 integrated 10/100/1000BASE-T copper transceivers eliminating the need for an external PHY bank, support for 1G/2.5G SerDes plus SGMII/QSGMII mac interfaces on remaining ports, and a flexible unmanaged-L2 feature set. Combined with a companion device such as the VSC8512 (a 12-port copper PHY from the same Microchip SparX-IV family), designers can build a 25-port switch using only two ICs, shrinking BOM cost and PCB area versus discrete-architectures.
Architecturally, the VSC7422XJG-04 integrates an L2 forwarding engine, dedicated per-port packet buffers, on-chip termination, and a SERDES physical layer. The device is targeted at designs that need a moderate-to-high port count, unmanaged or lightly-managed switching, and industrial-environment ruggedness without the cost of enterprise-grade managed switches.
Typical applications include industrial Ethernet switches, factory-floor networking equipment, IP-surveillance back-haul switches, smart-grid gateways, and small-business / SMB unmanaged switches. For designs requiring 2.5G uplinks, the SERDES lanes can be wired to external PHY or interconnect devices. The 672-HSBGA package demands careful PCB layout: a 4-layer minimum stack-up with an unbroken GND/VDD power island under the exposed die is required to meet IEEE 802.3 return-loss and emission targets.
When laying out a VSC7422XJG-04 PCB, design engineers should observe controlled-impedance routing on all copper traces (100-ohm differential for MDI pairs; 50-ohm single-ended for SERDES), maintain at least 200-mil separation between analog/digital grounds unless joined at a single ferrite, and provide sufficient thermal vias under the 672-HSBGA to keep junction temperature within margin when driving all 12 copper ports simultaneously.
This page synthesizes distributor pricing, drop-in alternatives, and practical PCB/thermal design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for VSC7422XJG-04 — 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:
VSC7422XJG-02
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
VSC7420XJG-04
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
VSC7422XJG-04
✅ Drop-In✓ In Stock
$116.3 / Unit
View Datasheet →VSC7422XJG-04 Maximum Ratings & Electrical Characteristics
| Product Type | Ethernet Switch IC (Telecom IC) |
| Switch Type | Unmanaged Layer-2 |
| Total Ports | 25 |
| Integrated Copper PHYs | 12 |
| PHY Speed | 10/100/1000 Mbps |
| MAC/SERDES Ports | 25 (SGMII/QSGMII/SerDes-capable) |
| Interface | Serial (SGMII, QSGMII, SerDes) |
| Supply Voltage | 1 V (core) |
| Operating Temperature | -40C to +85C (Industrial) |
| Package | 672-HSBGA, 27x27 mm |
| Mounting Type | Surface Mount (SMT) |
| Standard Package Quantity | 40 (Tray) |
| Number of Circuits | 1 |
| Category | Interface - Telecom |
VSC7422XJG-04 40 (tray) Pin Configuration Guide
Pin configuration for VSC7422XJG-04 (40 (tray) package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for VSC7422XJG-04.
Refer to the datasheet for full pin configuration.
Typical Applications
VSC7422XJG-04 is suitable for 6 applications: Industrial Ethernet Switch, Smart-Grid / Energy Networking Hub, IP Surveillance Back-Haul Switch, Small-Business / SMB Switch, Industrial IoT Gateway, Mobile Network Transport Switch.
Industrial Ethernet Switch
The VSC7422XJG-04's 12 integrated 10/100/1000BASE-T copper PHYs make it a strong fit for standalone industrial Ethernet switches used on factory floors and process-control networks. According to Microchip's product page, the device combines L2 forwarding with industrial -40C to +85C operation and 25 total ports, eliminating the need for an external PHY bank. Typical use: 19-inch DIN-rail-mount unmanaged switches with 12 copper user ports plus 12 SERDES uplink ports. Compared with a discrete-architecture switch (CPU + 12 PHYs + switch ASIC), this single-chip solution reduces BOM by ~30% and PCB area by ~40% per the manufacturer.
Recommended
Smart-Grid / Energy Networking Hub
Utility substations and smart-meter aggregation networks demand ruggedised switches that operate reliably across -40C to +85C with no fans. The VSC7422XJG-04 satisfies this with its industrial-temperature rating and integrated surge-tolerant copper PHYs. According to Microchip's product page, the unmanaged L2 feature set is sufficient for metering gateways where the device operates as a transparent bridge between utility sensors and back-haul fibre uplinks. Typical deployment: 8-12 outdoor substations linked via a private 1G ring. The 1V core supply simplifies back-up-power design using a single bulk DC/DC regulator.
Recommended
IP Surveillance Back-Haul Switch
Mid-sized surveillance installations (50-200 IP cameras) typically require a 24-port aggregation switch with at least 1G uplink capacity. The VSC7422XJG-04 with 12 integrated copper PHYs plus SERDES uplink lanes provides the ideal 25-port architecture for cameras running PoE-downstream. According to distributor listings, the device operates at industrial temperatures and integrates wire-speed L2 forwarding. Typical deployment: backbone for 200 IP cameras across a campus, fibre uplinks to a central NVR rack. Compared with a managed switch solution, the unmanaged-L2 architecture reduces firmware overhead and accelerates boot-to-operational time.
Recommended
Small-Business / SMB Switch
SMBs deploying a 24- or 25-port Gigabit switch for office LANs benefit from the VSC7422XJG-04's footprint efficiency and integrated-PHY BOM savings. According to Microchip's product page, this is the industry's first 25-port single-chip solution, allowing OEMs to ship compact 1U rack-mount units at price points under $200. Typical deployment: SMB office LAN with phones-on-desk and Wi-Fi-AP uplinks. The unmanaged-L2 architecture simplifies SKU management for OEMs who want a single firmware image across their product line, from 8-port to 25-port models.
Recommended
Industrial IoT Gateway
Industrial IoT gateways aggregate sensor data from connected machines onto an Ethernet backbone. The VSC7422XJG-04's industrial temperature rating and 25-port architecture allow a single gateway to host 12 wired sensor clusters plus multiple fibre uplinks to the cloud. According to Microchip product page, the integrated copper PHYs reduce PCB real-estate vs discrete designs, enabling small-form-factor DIN-rail gateways. Typical use: factory-line gateway aggregating vibration, temperature, and vision sensors for cloud ML inference. The -40C to +85C range ensures reliable operation in unconditioned cabinets.
Recommended
Mobile Network Transport Switch
Distributed antenna systems (DAS) and small-cell backhaul require compact Ethernet switches for transport of fronthaul/midhaul traffic. The VSC7422XJG-04 provides 25 ports at industrial temperature in a single IC, supporting radio-head aggregation in tower-top cabinets. According to Microchip product page, the SERDES lanes accept SGMII/QSGMII connections to small-cell modems. Typical deployment: 4 small-cell radios per tower with copper aggregation back to a base-band unit. The 1V supply simplifies power-redundancy architecture and matches typical -48V-to-1V intermediate bus converters.
Recommended
Recommended Products Summary
Engineering reference data for VSC7422XJG-04 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | VSC7422XJG-02 | VSC7420XJG-04 |
|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 672-HSBGA (27x27) | 672-HSBGA (27x27) - same | 672-HSBGA (27x27) - same |
| Total Ports | 25 | 25 | 24 |
| Integrated Copper PHYs | 12 | 12 | 12 |
| PHY Speed | 10/100/1000 Mbps | 10/100/1000 Mbps | 10/100/1000 Mbps |
| Switch Type | Unmanaged L2 | Unmanaged L2 | Unmanaged L2 |
| Operating Temperature | -40C to +85C (Industrial) | 0C to +70C (Commercial) | -40C to +85C (Industrial) |
| Supply Voltage | 1 V | 1 V | 1 V |
Key Differentiators
- Industry's first 25-port single-chip GbE switch with 12 integrated copper PHYs (vs VSC7420XJG-04)
- Industrial temperature grade -40C to +85C (vs VSC7422XJG-02)
- 12 integrated PHYs eliminate external PHY bank (vs Discrete-architecture (CPU + 12 PHYs + switch ASIC))
Design Notes
Estimated: the 672-HSBGA 27x27 mm package requires a 6-layer minimum PCB stack-up. Use 1 oz copper on outer layers and 0.5 oz on inner layers. Place a continuous GND/VDD plane under the BGA footprint with at least 200 thermal vias (0.3 mm drill, 0.6 mm pad) directly under the heat slug to keep junction temperature within margin when all 12 copper PHYs drive 100 m of CAT6 cable simultaneously.
Per IEEE 802.3, all MDI copper traces must be 100-ohm differential with intra-pair length matching under 150 mil. Keep MAC-to-PHY SERDES traces under 50 mil length differential (90-ohm for QSGMII). Decoupling should be 1 uF X7R plus 0.1 uF X7R per power-pin ball, placed within 2 mm of each via-in-pad BGA ball. Maintain at least 4 mm separation between analog and digital sections of the PCB unless joined at a single-point ferrite.
Estimated: with all 12 copper PHYs active at 100 m of CAT6 cable and full 1 Gbps traffic, total package power dissipation is approximately 5-7 W. Without thermal vias, junction temperature could exceed 110C at an 85C ambient. With the recommended 200-via thermal array, junction-to-ambient thermal resistance drops to roughly 12 C/W, keeping Tj around 110C at Ta=25C. Estimate inputs: 5W Pdiss, 12 C/W thetaJA, 85C ambient; verify with manufacturer thermal model before final layout.
Do not substitute the 1V core rail with a generic 1.05V or 0.95V rail - the VSC7422XJG-04 is sensitive to undervoltage and may fail to initialize at boot. Use a TPS628660AYCGR buck regulator (Site MPN) for the core supply with 1% output accuracy. Also avoid daisy-chaining the 3.3V PHY analog rail from a noisy source; this rail must come from a low-noise LDO. Confirm reference clock accuracy at +/- 50 ppm; any drift in the 25 MHz reference directly impacts PHY link stability.
Compliance Information
RoHS/REACH compliance not stated in provided distributor/web data; consult Microchip product page for the latest compliance certificate. AEC-Q100 not applicable (industrial temp, not automotive).
