USB2512B-I/M2 - 2-Port USB 2.0 Hi-Speed Hub Controller | Microchip
MPN： USB2512B-I/M2 ✓ 啟用中USB2512B-I/M2 概覽
A USB hub controller is a USB class-compliant device that expands one upstream USB port into multiple downstream ports while managing power negotiation, bus enumeration, and split-transaction routing. The hub sits in the broader USB controller hierarchy (USB 2.0 interface IC → USB hub → USB compound device) and is the standard building block for adding USB Type-A downstream ports to laptops, docking stations, monitors, automotive head units, and embedded SBCs.
Key features include integrated upstream and downstream termination resistors (saving external component count), configurable port-mapping via pin strap or SMBus, per-port power-switch control with over-current sensing, and individual port ganging. The device supports battery-charging detection (BC 1.2) on downstream ports when paired with an external charger emulator, and offers an optional JTAG boundary-scan interface for board-level test.
MultiTRAK™ technology dedicates a transaction translator to each downstream port, allowing concurrent traffic on ports operating at different speeds (e.g., a Full-Speed keyboard plus a Hi-Speed storage drive). Compared to single-TT hubs that serialize all downstream transactions, this dramatically improves throughput in mixed-speed, detachable-device scenarios typical of consumer and embedded designs.
Typical applications include laptop docking stations, USB Type-A expansion on monitors and TVs, automotive infotainment rear-seat charging hubs, industrial panel PCs, and consumer electronics such as set-top boxes and printers requiring USB port expansion. The 36-SQFN 6x6 mm footprint also enables compact mobile and IoT designs.
When designing with this part, ensure the upstream port's VBUS detection is routed correctly and that downstream over-current sensing resistors match the chosen power switch FETs. The /PRTPWR and /OCS pins require careful PCB layout to avoid false-trip events during hot-plug events.
This page synthesizes current distributor pricing, drop-in same-family alternatives (USB2512B-AEZG, USB2512BT-I/M2), and practical design notes not duplicated in the manufacturer datasheet.
直接替換替代品，適用於 USB2512B-I/M2 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： USB2512B-I/M2 （相同外形與佔位） — 差異在於 Package, Number of Downstream Ports, RoHS Status, Product Type, Battery Charging Support.
USB2512BT-I/M2
✅ 直接替換📋 參考替代品（不在目錄中）
USB2512B/M2
✅ 直接替換聯絡詢價
查看資料表 →USB2512B-AEZG
✅ 直接替換📋 參考替代品（不在目錄中）
USB2512BI/M2
✅ 直接替換📋 參考替代品（不在目錄中）
USB2513B/M2
✅ 直接替換聯絡詢價
查看資料表 →USB2512B-I/M2 規格
| Product Type | USB 2.0 Hi-Speed Hub Controller |
| Number of Downstream Ports | 2 |
| USB Speed Support | Hi-Speed (480 Mbps), Full-Speed (12 Mbps), Low-Speed (1.5 Mbps) |
| Supply Voltage (VDD33) | 3.0 V to 3.6 V |
| Supply Voltage (VDD18/VPH) | 1.65 V to 3.6 V |
| Operating Temperature (Industrial) | -40C to +85C |
| 封裝 | 36-SQFN (6x6 mm) |
| 安裝類型 | Surface Mount |
| Upstream Termination | Integrated (1.5 kohm pull-up, 15 kohm pull-down) |
| Downstream Termination | Integrated per port |
| Transaction Translator Topology | MultiTRAK (1 TT per downstream port) |
| Power Switching Support | Yes, ganged or individual per port |
| Over-Current Sensing | Yes, per port |
| Battery Charging Support | External (BC 1.2 via companion charger emulator) |
| Configuration Interface | SMBus / Pin strap |
| JTAG Boundary Scan | Yes |
| RoHS 狀態 | Compliant |
| MSL 等級 | 3 (per JEDEC J-STD-020, 168 hours) |
| VBUS Current (per downstream port) | Up to 500 mA (USB 2.0 standard) |
USB2512B-I/M2 36-sqfn (6x6 mm) 腳位配置指南
USB2512B-I/M2（36-sqfn (6x6 mm) 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： USB2512B-I/M2.
請參閱 資料表 以查看完整腳位配置。
典型應用
USB2512B-I/M2 適用於 6 應用s: Laptop Docking Station USB Expansion, Monitor/Display USB Hub, Embedded SBC USB Expansion, Set-Top Box / Consumer Electronics USB Port, Automotive Rear-Seat Infotainment Hub, Industrial Printer / Multi-Function Device.
Laptop Docking Station USB Expansion
The USB2512B-I/M2 is well suited for laptop docking stations that need to expose 2 downstream USB Type-A ports to peripherals such as keyboards, mice, and external storage. Its MultiTRAK™ topology dedicates a transaction translator to each port, allowing a Full-Speed keyboard and a Hi-Speed SSD to operate concurrently without bandwidth contention. The integrated upstream and downstream termination resistors eliminate external 15 kohm pull-downs and 1.5 kohm pull-ups, shrinking the docking station BOM. With a 3.3 V supply and 36-SQFN 6x6 mm footprint, it fits into slim docking designs while supporting USB 2.0 Hi-Speed at 480 Mbps. Pair with TUSB4041IPAP from the Site MPN list for higher-port-count docks.
推薦
Monitor/Display USB Hub
Monitors with built-in USB hubs use the USB2512B-I/M2 to provide 2 downstream USB 2.0 ports for connecting webcams, headsets, and flash drives to a host PC over a single upstream cable. Its per-port over-current sensing and /PRTPWR outputs integrate directly with downstream power switches, simplifying the monitor power-distribution design. The industrial -40C to +85C temperature range covers typical monitor chassis thermal envelopes. MultiTRAK™ prevents a Full-Speed webcam from starving a Hi-Speed external SSD during simultaneous use, preserving 480 Mbps throughput where it matters. The 36-SQFN 6x6 mm package fits behind the LCD panel alongside the scaler board.
推薦
Embedded SBC USB Expansion
Single-board computers and industrial panel PCs often need 2 additional USB 2.0 ports beyond what the SoC exposes natively, and the USB2512B-I/M2 adds them via USB 2.0 Hi-Speed with no driver changes on the host side. The SMBus configuration interface lets the SBC firmware customize port behavior (ganged vs individual power, removable-port bitmap) at boot. The integrated termination resistors keep the analog USB PHY layout compact, which is critical on the small PCBs typical of SBCs. Combined with the industrial temperature grade, it is a fit for factory-floor controllers and HMI panels. Use the TPS54560QDDAQ1 from the Site MPN list for the SBC main rail.
推薦
Set-Top Box / Consumer Electronics USB Port
Set-top boxes, smart TVs, and gaming consoles use the USB2512B-I/M2 to add 2 user-facing USB 2.0 ports for external storage, game controllers, and Wi-Fi dongles. The MultiTRAK™ per-port transaction translators let a USB Wi-Fi adapter and an external HDD run concurrently without throughput loss, which is critical for streaming media applications. Pin-strap configuration avoids requiring an EEPROM or firmware for low-cost consumer designs. The 36-SQFN footprint keeps the PCB footprint small enough for slim consumer enclosures. RoHS compliance meets all major consumer-market environmental regulations.
推薦
Automotive Rear-Seat Infotainment Hub
In rear-seat entertainment modules and cabin USB charging hubs, the USB2512B-I/M2 provides 2 downstream ports for passenger devices while accepting an upstream link from the head unit. The industrial -40C to +85C temperature range covers cabin environments, and MultiTRAK™ keeps multiple passenger devices working concurrently. The integrated port-power control with over-current sensing directly drives external power switches and reports faults to the head unit via the SMBus. While not AEC-Q100 qualified, the -I/M2 industrial grade is widely accepted for non-safety cabin infotainment. Pair with TPS92630QPWPRQ1 from the Site MPN list for LED status indication.
推薦
Industrial Printer / Multi-Function Device
Multi-function printers and label printers use the USB2512B-I/M2 to expose a USB Type-B upstream port and 2 downstream ports for walk-up users (USB stick scanning, PictBridge cameras, NFC readers). MultiTRAK™ ensures a Full-Speed card reader does not degrade Hi-Speed scanner throughput. The integrated upstream termination eliminates the need for an external 1.5 kohm pull-up, simplifying the analog front-end design. Industrial temperature grade suits factory-floor deployments. The 36-SQFN 6x6 mm footprint fits within the printer controller board alongside STM32F373RBT6 host MCUs from the Site MPN list.
推薦
推薦產品摘要
工程參考資料，適用於 USB2512B-I/M2 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | USB2512BT-I/M2 | USB2512B/M2 | USB2512B-AEZG | USB2512BI/M2 | USB2513B/M2 |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 36-SQFN (6x6 mm) | 36-SQFN (6x6 mm) - same | 36-SQFN (6x6 mm) - same | 36-QFN (AEZG, 6x6 mm) - same family | 36-SQFN (6x6 mm) - same | 36-SQFN (6x6 mm) - same |
| Downstream Ports | 2 | 2 | 2 | 2 | 2 | 3 |
| USB Speed | USB 2.0 Hi-Speed (480 Mbps) | USB 2.0 Hi-Speed (480 Mbps) | USB 2.0 Hi-Speed (480 Mbps) | USB 2.0 Hi-Speed (480 Mbps) | USB 2.0 Hi-Speed (480 Mbps) | USB 2.0 Hi-Speed (480 Mbps) |
| Transaction Translator Topology | MultiTRAK (1 TT per port) | MultiTRAK (1 TT per port) | MultiTRAK (1 TT per port) | MultiTRAK (1 TT per port) | MultiTRAK (1 TT per port) | MultiTRAK (1 TT per port) |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | 0C to +70C (Commercial) | 0C to +70C (Commercial) | -40C to +85C (Industrial) | 0C to +70C (Commercial) |
| Integrated Termination | Yes (upstream + downstream) | Yes | Yes | Yes | Yes | Yes |
| Configuration Interface | SMBus / Pin strap | SMBus / Pin strap | SMBus / Pin strap | SMBus / Pin strap | SMBus / Pin strap | SMBus / Pin strap |
| RoHS Compliance | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant |
主要差異化特點
- MultiTRAK™ per-port transaction translators (對比USB2422)
- Industrial -40C to +85C temperature grade (對比USB2512B-AEZG)
- Integrated upstream/downstream termination resistors (對比TUSB2046B (TI))
- 36-SQFN compact 6x6 mm footprint (對比USB2514BT-I/M2 (4-port, same family))
- SMBus configuration for runtime port control (對比USB2512B-AEZG (pin-strap only AEZG variants))
設計說明
Estimated: route the USB 2.0 differential pairs (DP/DM upstream and downstream) with 90-ohm differential impedance and equal length matching within 150 mil. Place the 36-SQFN decoupling capacitor (0.1 uF) within 2 mm of each VDD33 pin and add a 4.7 uF bulk capacitor near the IC. The exposed thermal pad must be soldered to a ground plane with at least 4 thermal vias for heat dissipation. Keep DP/DM traces away from switching power nodes and route over a continuous ground reference to maintain 90-ohm impedance.
Per the Microchip USB2512B datasheet, the upstream VBUS sense pin must be connected through a voltage divider (typically 100 kohm and 27 kohm to scale 5 V VBUS to the 3.3 V VBUS_SENSE input). For downstream port power, the /PRTPWR outputs drive external high-side power switches (e.g., N-channel MOSFETs) and the corresponding /OCS inputs sense over-current via the FET RDS(on) or a dedicated sense resistor. Add 10 uF bulk capacitance on each downstream VBUS rail per USB 2.0 requirements.
Do not float the CFG_SEL pin - it selects between SMBus and pin-strap configuration modes and floating can cause indeterminate behavior. The CRFILT pin requires a 0.1 uF X7R capacitor to ground; omitting it prevents the internal clock from stabilizing. For battery-charging support, the USB2512B does not include BC 1.2 detection natively; an external charger emulator IC (e.g., Microchip MCP73871 or equivalent) must be added downstream. Hot-plug events can cause brief VBUS droops - add 100 uF bulk capacitance on the upstream VBUS rail to prevent host-side brownout.
USB 2.0 Hi-Speed signaling at 480 Mbps requires careful attention to DP/DM trace impedance (90-ohm differential), trace length matching (<150 mil skew between DP and DM), and via stubs (use blind/buried vias or remove stub via back-drilling if total via stub exceeds 100 mil). The Microchip datasheet recommends keeping DP/DM traces as short as possible and avoiding right-angle bends - use 45-degree or curved bends. Add a common-mode choke on each DP/DM pair near the connector to suppress EMI from the cable and improve radiated emissions compliance (EN 55022 / FCC Part 15).
Estimated: keep the crystal or external clock source within 5 mm of the XI/XO pins and surround it with a ground guard ring. Isolate the analog ground (GNDP, GNDO) from the digital ground (GNDD) and join them at a single point near the IC ground pad to prevent digital switching noise from coupling into the USB PHY. The 36-SQFN exposed pad must be soldered to a contiguous ground plane with multiple thermal vias (typically 5-9 vias in a 3x3 grid). Maintain 4-wire isolation (DP, DM, VBUS, GND) on the upstream and downstream USB connectors to preserve signal integrity through the cable.
合規資訊
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - use automotive-grade USB251x variants for safety-critical automotive applications. Lead-free (Pb-free) reflow profile per JEDEC J-STD-020. Conflict-minerals compliance per Microchip policy.
