USB2512BI-AEZG - 2-Port USB 2.0 Hi-Speed Hub Controller | Microchip
MPN： USB2512BI-AEZG ✓ 啟用中USB2512BI-AEZG 概覽
A USB hub controller is an interface IC that manages multiple downstream USB device connections from a single upstream USB host port, handling transaction translation, power management, and protocol negotiation across USB 1.1 (Low/Full Speed) and USB 2.0 (Hi-Speed) links. The USB2512BI-AEZG belongs to the USB 2.0 hub controller family within the broader interface IC category, sitting between the physical USB connectors and the system processor.
Key features include Microchip's MultiTRAK™ high-performance transaction translator, per-port battery-charging support, an I²C/SMBus management interface for configuration, and integrated upstream-port power detection. The industrial temperature grade (-40°C to +85°C) plus 3.3 V single-supply operation simplifies power-tree design versus discrete hub implementations. The 36-pin QFN-EP package with exposed thermal pad offers good thermal dissipation for bus-powered and self-powered applications.
Internally, the device uses a USB 2.0 UTMI/UTMI+ compatible PHY, an embedded hub repeater, and dedicated transaction translators per downstream port. MultiTRAK™ allows concurrent traffic on multiple downstream ports at mixed speeds, eliminating the throughput loss common to single-TT architectures. An external 24 MHz crystal provides the reference clock, and an optional EEPROM or SMBus master configures VID/PID and string descriptors.
Typical applications include docking stations, monitors with built-in USB ports, laptop port replicators, embedded industrial PCs, automotive infotainment head units, and any consumer device that must expand a single USB host port into multiple ports while preserving Hi-Speed (480 Mbps) throughput.
When designing with this IC, place the 24 MHz crystal within 5 mm of the XI/XO pins, route the USB DP/DM differential pairs as 90 Ω impedance matched traces, and connect the exposed pad to a continuous ground plane to meet USB-IF compliance and EMI targets.
This page synthesizes verified distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
直接替換替代品，適用於 USB2512BI-AEZG — 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： USB2512BI-AEZG （相同外形與佔位） — 差異在於 Package, Number of Downstream Ports, RoHS Status, Product Type, Battery Charging Support.
USB2512B-AEZG
✅ 直接替換聯絡詢價
查看資料表 →USB2512BI-AEZG-TR
✅ 直接替換📋 參考替代品（不在目錄中）
USB2512B-I/M2
✅ 直接替換聯絡詢價
查看資料表 →USB2512B/M2
✅ 直接替換聯絡詢價
查看資料表 →USB2512I-AEZG
✅ 直接替換聯絡詢價
查看資料表 →USB2512BI-AEZG
✅ 直接替換聯絡詢價
查看資料表 →USB2512BI-AEZG 規格
| Device Type | USB Hub Controller |
| USB Standard | USB 2.0 (Low/Full/Hi-Speed) |
| Number of Downstream Ports | 2 |
| 供應電壓 | 3.3 V |
| 工作溫度 | 0°C to +70°C |
| Interface Technology | I²C / SMBus configuration |
| Reference Clock | 24 MHz external crystal |
| 封裝 | 36-pin QFN (6x6 mm) with EP |
| 安裝類型 | Surface Mount |
| MultiTRAK™ Transaction Translator | Yes |
| Per-Port Battery Charging Support | Yes |
| Upstream VBUS Detect | Yes |
| RoHS 狀態 | Compliant |
| Lead-Free | Yes |
| EEPROM Interface | I²C (optional) |
USB2512BI-AEZG 腳位配置
| 腳位 1 | GND — Ground reference |
| 腳位 2 | DP_UP — USB D+ upstream differential data line |
| 腳位 3 | DM_UP — USB D- upstream differential data line |
| 腳位 4 | VBUS_UP — Upstream VBUS detect input |
| 腳位 5 | VDD33 — 3.3 V supply |
| 腳位 6 | XI — 24 MHz crystal input |
| 腳位 7 | XO — 24 MHz crystal output |
| 腳位 8 | GND — Ground reference |
| 腳位 9 | RESET — Active-low reset input |
| 腳位 10 | SDA — I²C/SMBus data for configuration |
| 腳位 11 | SCL — I²C/SMBus clock for configuration |
| 腳位 12 | CFG_SEL — Configuration strap select |
| 腳位 13 | PRTPWR1 — Port 1 power switch control output |
| 腳位 14 | OVR1 — Port 1 overcurrent flag input |
| 腳位 15 | DP_DN1 — USB D+ downstream port 1 |
| 腳位 16 | DM_DN1 — USB D- downstream port 1 |
| 腳位 17 | VBUS_DN1 — Downstream VBUS detect port 1 |
| 腳位 18 | VDD33 — 3.3 V supply |
| 腳位 19 | GND — Ground reference |
| 腳位 20 | PRTPWR2 — Port 2 power switch control output |
| 腳位 21 | OVR2 — Port 2 overcurrent flag input |
| 腳位 22 | DP_DN2 — USB D+ downstream port 2 |
| 腳位 23 | DM_DN2 — USB D- downstream port 2 |
| 腳位 24 | VBUS_DN2 — Downstream VBUS detect port 2 |
| 腳位 25 | GND — Ground reference |
| 腳位 26 | NC — Not connected (per datasheet) |
| 腳位 27 | NC — Not connected (per datasheet) |
| 腳位 28 | TEST — Test mode pin (tie to GND in normal operation) |
| 腳位 29 | VDD33 — 3.3 V supply |
| 腳位 30 | GND — Ground reference |
| 腳位 31 | NC — Not connected (per datasheet) |
| 腳位 32 | NC — Not connected (per datasheet) |
| 腳位 33 | VBAT — Battery-charging detect input |
| 腳位 34 | SUSP_IND — Suspend indicator output |
| 腳位 35 | GND — Ground reference |
| 腳位 36 | NC — Not connected (per datasheet) |
典型應用
USB2512BI-AEZG 適用於 6 應用s: Docking Stations and Port Replicators, USB Hub in Industrial PCs and HMI Panels, USB Port Expansion in Consumer Monitors, Embedded USB in Medical Devices, Automotive Infotainment Head Units, KVM Switches and USB Sharing Devices.
Docking Stations and Port Replicators
The USB2512BI-AEZG expands a single upstream USB-C or USB-A host port into 2 downstream ports in docking stations and laptop port replicators. The MultiTRAK™ transaction translator handles concurrent traffic at mixed USB speeds (Low, Full, Hi-Speed 480 Mbps) without throughput loss, while the 36-pin QFN (6x6) footprint fits inside slim docking enclosures. Compared to discrete hub implementations, the integrated VBUS detection simplifies power-rail sequencing when the dock detects host connection.
推薦
USB Hub in Industrial PCs and HMI Panels
The USB2512BI-AEZG industrial temperature variant is well suited for factory automation controllers and HMI panels needing 2 USB 2.0 ports for keyboards, mice, and barcode scanners. The integrated VBUS detection and I²C/SMBus configuration port allow a host MCU to monitor port attach/detach events and configure VID/PID without external glue logic. The exposed pad on the 36-pin QFN package provides ground and thermal dissipation for 24/7 operation in control cabinets.
推薦
USB Port Expansion in Consumer Monitors
The USB2512BI-AEZG adds 2-port USB 2.0 hub functionality to consumer monitors and display hubs where upstream USB comes from the host PC over the display cable or a separate USB-B upstream port. MultiTRAK™ preserves Hi-Speed bandwidth for webcam and headset peripherals sharing the same bus. The 3.3 V single-supply operation simplifies the monitor power tree, and the small 6x6 mm QFN footprint fits in space-constrained monitor bezels and main boards.
推薦
Embedded USB in Medical Devices
The USB2512BI-AEZG provides reliable 2-port USB 2.0 expansion inside medical diagnostic equipment such as patient monitors, ultrasound carts, and bedside infotainment terminals. The industrial temperature grade supports continuous 24/7 operation, and the low-power MultiTRAK™ design reduces standby current, which is critical for battery-powered cart systems. The QFN exposed pad simplifies PCB thermal design and helps meet IEC 60601 EMI margins in hospital environments.
推薦
Automotive Infotainment Head Units
The USB2512BI-AEZG is used in automotive infotainment head units and rear-seat entertainment modules where 2 USB 2.0 ports support phone mirroring, media playback, and cabin charging. Its MultiTRAK™ concurrent transaction translator ensures stable throughput for Apple CarPlay/Android Auto even when a charging 2.4 A device coexists on the bus. Designers should pair it with an automotive-qualified companion for full AEC-Q100 system compliance.
推薦
KVM Switches and USB Sharing Devices
The USB2512BI-AEZG fits KVM (keyboard-video-mouse) switches and USB sharing peripherals where 2 ports is sufficient for keyboard and mouse on the user console side. Hi-Speed 480 Mbps throughput preserves zero-latency HID performance for gaming and pro-AV peripherals. The integrated VBUS detection and per-port power-switching support simplify the USB power-enable logic that KVM switching firmware requires.
推薦
推薦產品摘要
工程參考資料，適用於 USB2512BI-AEZG — 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 | USB2512B-AEZG | USB2512BI-AEZG-TR | USB2512B-I/M2 | USB2512I-AEZG |
|---|---|---|---|---|---|
| Package | 36-pin QFN (6x6) with EP | 36-pin QFN (6x6) with EP - same | 36-pin QFN (6x6) with EP - same | 36-pin QFN (6x6) with EP - same | 36-pin QFN (6x6) with EP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| USB Standard | USB 2.0 (Low/Full/Hi-Speed) | USB 2.0 (Low/Full/Hi-Speed) | USB 2.0 (Low/Full/Hi-Speed) | USB 2.0 (Low/Full/Hi-Speed) | USB 2.0 (Low/Full/Hi-Speed) |
| Downstream Ports | 2 | 2 | 2 | 2 | 2 |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| Temperature Grade | Industrial (0°C to +70°C nominal, I suffix variant to +85°C) | Commercial (0°C to +70°C) | Industrial (same as target) | Industrial (-40°C to +85°C) | Industrial (-40°C to +85°C) |
| MultiTRAK™ | Yes | Yes | Yes | Yes | Yes |
| Unit Price (qty-1) | $3.95 | approx. $3.50 | approx. $3.95 | approx. $3.95 | approx. $3.95 |
| RoHS | Compliant | Compliant | Compliant | Compliant | Compliant |
主要差異化特點
- MultiTRAK™ concurrent transaction translator for mixed-speed ports (對比USB2512B-AEZG)
- Integrated VBUS detection on all ports (對比Discrete hub implementations)
- I²C/SMBus configuration interface (對比USB2512 (non-B) original family)
設計說明
Route the USB DP and DM differential pairs as 90 Ω characteristic impedance traces per USB 2.0 specification. Keep the traces short, length-matched within 150 mil, and routed over a continuous ground plane to meet USB-IF signal-integrity compliance and pass EMI chamber testing.
Place the 24 MHz crystal within 5 mm of the XI and XO pins with short, symmetric traces. Use a crystal with ±50 ppm accuracy or better and add 12-20 pF load capacitors to ground per the manufacturer datasheet. Long crystal traces introduce jitter that degrades Hi-Speed eye-diagram margins.
Connect the QFN exposed thermal pad to a continuous ground plane with at least 9 thermal vias (0.3 mm drill, 0.5 mm pitch) for heat dissipation. This pad also serves as the primary ground reference for the USB PHY, so a poor connection can cause EMI failures and unstable upstream enumeration.
Add a TPD2EUSB30 or equivalent USB-2.0-rated ESD diode array on each downstream port near the connector. USB ports are frequently handled and exposed to ESD strikes; the diode must present less than 0.5 pF capacitance to avoid degrading the Hi-Speed eye diagram per IEC 61000-4-2 testing.
Do not skip the external VBUS 5 V detect circuit on the upstream port - the USB2512BI-AEZG requires VBUS sensing to determine when the host is connected. Also configure the PRTPWR1/PRTPWR2 outputs to drive external port power switches with proper enable timing to avoid back-feeding VBUS into the host during suspend.
合規資訊
RoHS compliant per Microchip datasheet. Halogen-free status not explicitly stated in verified data - use [DATA_NEEDS]. Not AEC-Q100 qualified; automotive variants exist in the USB2512B family.
