USB20H04-JT - 4-Port USB 2.0 Hub Controller | SMSC
MPN: USB20H04-JT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.65 | $2.65 |
| 10 | $2.65 | $26.50 |
| 100 | $2.65 | $265.00 |
| 500 | $2.65 | $1,325.00 |
| 1,000 | $2.65 | $2,650.00 |
| 3,000 | $2.65 | $7,950.00 |
USB20H04-JT Overview
A USB hub controller is an interface semiconductor that manages traffic between one upstream USB host and multiple downstream devices. It belongs to the USB interface-controller hierarchy and coordinates attachment, enumeration, power management, and data transfer so that peripheral devices can share one host controller. The USB20H04-JT targets USB 2.0 hubs requiring multiple high-speed downstream ports.
Four transaction translators are the device's principal architectural feature and help maximize USB throughput when devices on different downstream branches transfer data concurrently. The controller supports OTG-compatible USB devices and bus-powered Hi-Speed hub designs, making it useful in compact external hubs, docking stations, printers, storage systems, and embedded USB equipment. Its stated supply current is 135 mA, which must be included in hub power-budget calculations.
The USB20H04-JT supports serial, I2C, and SMBus host-side connectivity, allowing firmware or an external controller to supervise hub behavior. Its lead-free construction and surface-mount format support automated PCB assembly, although the 64-pin TQFP package requires careful fanout and exposed-pad-free thermal review. The component is identified as CMOS and TQFP-64 in distributor records.
For design work, route USB differential pairs as controlled-impedance, length-matched connections and keep supply decoupling close to the device. The verified material does not provide a complete pinout, electrical limits table, supported current budget, or detailed timing values in the supplied text, so those details must be verified in the manufacturer datasheet before schematic release or USB compliance testing.
This product data consolidates verified distributor specifications, the identified USB2504 migration path, sourcing references, and practical design cautions. Engineers should treat the USB2504 family as a documented migration option, not as an automatically interchangeable replacement until package pinout, firmware, clock, power, and USB compliance requirements are checked.
Drop-in alternatives for USB20H04-JT — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with USB20H04-JT (same form factor and footprint) — differing in Package, Product Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
USB2504-JT
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View Datasheet →USB20H04-JT Specifications
| Product Type | 4-port USB 2.0 hub controller |
| USB Interface | USB 2.0 |
| Downstream Ports | 4 ports |
| Transaction Translators | 4 |
| Host Interfaces | I2C, SMBus, serial |
| Supply Voltage Range 1 | 1.74 V to 2 V |
| Supply Voltage Range 2 | 3 V to 3.6 V |
| Supply Current | 135 mA |
| Operating Temperature | 0°C to 70°C |
| Package | 64-pin TQFP, 10 mm x 10 mm |
| Package Thickness | 1.40 mm |
| Mounting Type | Surface mount |
| Technology | CMOS |
| Moisture Sensitivity Level | MSL 3, 168 hours |
| Lead-Free Status | Lead free |
| REACH Status | Unaffected |
| Bus-Powered Hi-Speed Support | Supported |
| OTG Device Compatibility | Compatible |
USB20H04-JT 1.40 mm Pin Configuration Guide
Pin configuration for USB20H04-JT (1.40 mm 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 USB20H04-JT.
Refer to the datasheet for full pin configuration.
Typical Applications
USB20H04-JT is suitable for 6 applications: External USB 2.0 Hub, USB Docking Station, Bus-Powered Hi-Speed Hub, USB Storage Hub, Legacy USB 2.0 Peripheral Hub, USB-to-Ethernet Adapter.
External USB 2.0 Hub
The USB20H04-JT fits an external four-port USB 2.0 hub because it combines four downstream ports with four transaction translators, allowing separate traffic paths for simultaneous device activity. The verified controller interfaces include I2C, SMBus, and serial connectivity for hub supervision, while its 3 V to 3.6 V range fits a typical 3.3 V hub rail. The design must still budget the listed 135 mA supply current and confirm downstream current limits from the manufacturer datasheet.
Recommended
USB Docking Station
A docking station can use the USB20H04-JT to add four USB 2.0 downstream ports around a host interface without assigning every branch to a separate controller. Four transaction translators support concurrent traffic on separate branches, while serial, I2C, and SMBus options provide paths for configuration and monitoring. Layout must preserve USB impedance and routing symmetry, and the product's 0°C to 70°C range limits deployments requiring a wider industrial temperature span.
Recommended
Bus-Powered Hi-Speed Hub
The USB20H04-JT is explicitly identified as enabling bus-powered Hi-Speed hub designs, making it relevant to compact hubs powered through USB rather than an external adapter. Its four downstream ports provide fan-out, and four transaction translators help preserve throughput across branches. The stated 135 mA supply current must be checked against available upstream power alongside downstream-device loads; those detailed limits are not present in the verified excerpts.
Recommended
USB Storage Hub
The USB20H04-JT can serve as the hub controller in storage accessories that expose multiple USB 2.0 devices through one upstream connection. Its four transaction translators help separate traffic from attached peripherals, reducing shared-bus contention compared with a hub that lacks equivalent branch isolation. For storage applications, validate enumeration firmware, drive-current allocation, connector protection, and sustained transfer behavior because those values are not supplied in the verified text.
Recommended
Legacy USB 2.0 Peripheral Hub
The USB20H04-JT is appropriate when maintaining an existing SMSC-based USB 2.0 peripheral design with known firmware, board layout, and legacy inventory. Its I2C, SMBus, and serial host interfaces allow integration with an embedded supervisory controller, and its four downstream ports match common hub topologies. For an established product, retaining the qualified controller can reduce migration risk, but date code, condition, and long-term supply should be verified.
Recommended
USB-to-Ethernet Adapter
A USB-to-Ethernet adapter can pair the USB20H04-JT's USB device-facing interface with a network controller, while the hub capability supports additional internal or external USB peripherals where needed. The controller's four downstream ports and transaction translators are useful in multi-function adapters with more than one USB branch. However, the verified material does not confirm a dedicated Ethernet PHY, so the network side requires a separate companion device and full signal-integrity review.
Recommended
Recommended Products Summary
Engineering reference data for USB20H04-JT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | USB2504-JT |
|---|---|---|
| Package | 64-pin TQFP, 10 mm x 10 mm | 64-pin TQFP; manufacturer note states identical footprint |
| Brand | Microchip Technology | Microchip Technology |
| Product Type | 4-port USB 2.0 hub controller | 4-port USB 2.0 hub controller |
| USB Standard | USB 2.0 | USB 2.0 |
| Downstream Ports | 4 ports | 4 ports |
Key Differentiators
- Four independent transaction translators support concurrent downstream traffic (vs USB2504-JT)
- Supports both low-voltage and 3.3 V operating ranges (vs USB2504-JT)
- Documented migration footprint for future USB2504 adoption (vs USB2504-JT)
Design Notes
Place required decoupling capacitors adjacent to the appropriate USB20H04-JT supply and ground pins, and provide a low-impedance ground reference. The verified material does not specify capacitor values, so use the manufacturer recommended network rather than extrapolating values from another USB controller. Preserve the documented 64-pin TQFP fanout and avoid placing disruptive switching circuitry beneath USB routing regions.
Route each USB 2.0 differential pair as a controlled-impedance, tightly coupled pair with matching upstream and downstream paths. Minimize stubs, vias, and right-angle transitions, and keep return-current paths continuous over split plane boundaries. Because the supplied data does not state the required trace impedance, derive the PCB stackup target from the board fabricator's actual dielectric and copper data before fabrication.
Do not treat the identical USB2504 footprint statement as proof of unconditional drop-in equivalence. The manufacturer migration note establishes mechanical compatibility for the 64-pin TQFP footprint, but an existing design still requires pin-signal, clock, supply, firmware, enumeration, and compliance checks. Label the transition as a controlled migration rather than a generic distributor substitution.
The verified 135 mA supply-current figure is only one part of a complete hub power budget. Separately budget controller, regulator efficiency, downstream-port limits, inrush, cable losses, and attached-device loads. Estimated: if the controller consumes 135 mA at 3.3 V, its input power is approximately 0.446 W before regulator loss; this is an arithmetic estimate, not a manufacturer power rating.
Compliance Information
Verified distributor data identifies the part as lead free and REACH unaffected. RoHS, halogen-free, and conflict-minerals status were not explicitly provided. AEC-Q100 is not applicable because this is a general-purpose commercial-temperature interface controller rather than an automotive-qualified part.
