CY7C65621-56LTXC - USB 2.0 2-Port Hub Controller | Infineon
MPN: CY7C65621-56LTXC ✓ Hoạt độngCY7C65621-56LTXC Tóm tắt
A USB 2.0 hub controller is a class of interface IC that expands one upstream USB port into multiple downstream ports, handling transaction translation (TT), signal conditioning, and protocol compliance. The HX2LP Lite family belongs to Infineon's USB hub controller hierarchy, sitting between USB transceivers (physical layer only) and full USB host controllers (which add host-role processing). This positions the CY7C65621 as a self-contained USB 2.0 hub IC suitable for embedded systems without an internal root hub.
Key features include USB 2.0 compliance at low-, full-, and high-speed (480 Mbps), integrated upstream and downstream transceivers, single-TTT transaction translation, bus-powered or self-powered operation, and per-port overcurrent detection. The 56-QFN package provides a low-profile footprint for space-constrained designs such as docking stations, monitors, and embedded motherboards.
The CY7C65621 employs a serial interface engine plus a hub repeater architecture, offloading USB protocol overhead from the system processor. Per-port overcurrent sensing and ganged-power-switching reduce BOM cost, while internal pull-up/pull-down resistors simplify PCB layout by removing most external USB components.
Typical applications include USB 2.0 hubs and docking stations, monitors with integrated USB ports, embedded motherboards, industrial USB expansion modules, and consumer peripherals such as printers. The wide operating voltage and low suspend current also make it suitable for battery-powered USB expansion accessories.
When designing with this device, follow Infineon's reference schematic for USB impedance-controlled routing (90 ohm differential) and place the 24 MHz crystal within 5 mm of the XTALIN/XTALOUT pins. Decouple VBATT and VDD with 1uF ceramic capacitors placed within 2 mm of the respective pins.
This page synthesizes distributor pricing, drop-in alternative listings, and PCB layout design notes not found in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho CY7C65621-56LTXC — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với CY7C65621-56LTXC (cùng hình factor và footprint) — khác nhau ở Package Type, Operating Temperature, Package, Product Family.
CY7C65621-56LTXIT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
CY7C65621-56LTXCT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →CY7C65631-56LTXI
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Xem tài liệu →CY7C65631-56LTXC
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Xem tài liệu →CY7C65621-56LTXC Thông số kỹ thuật
| Product Type | USB 2.0 Hub Controller |
| Series | EZ-USB HX2LP Lite |
| USB Specification | USB 2.0 (Low/Full/High Speed, 480 Mbps) |
| Downstream Ports | 2 |
| Transaction Translator | Single-TT |
| Power Mode | Bus-Powered or Self-Powered |
| Supply Voltage (VDD) | 3.3 V typical |
| Operating Temperature (C-grade) | 0C to +70C (commercial) |
| Hộp | 56-QFN (8x8 mm) with Exposed Pad |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
Cấu hình chân CY7C65621-56LTXC
| Chân 1 | VBUS_UP — Upstream VBUS detect input |
| Chân 2 | DP_UP — Upstream USB D+ signal |
| Chân 3 | DM_UP — Upstream USB D- signal |
| Chân 4 | GND — Ground reference |
| Chân 5 | DP_DN1 — Downstream port 1 USB D+ signal |
| Chân 6 | DM_DN1 — Downstream port 1 USB D- signal |
| Chân 7 | OC1_N — Port 1 overcurrent sense input (active low) |
| Chân 8 | PWR1_N — Port 1 power switch enable output (active low) |
| Chân 9 | VBUS_DN1 — Downstream port 1 VBUS detect input |
| Chân 10 | GND — Ground reference |
| Chân 11 | DP_DN2 — Downstream port 2 USB D+ signal |
| Chân 12 | DM_DN2 — Downstream port 2 USB D- signal |
| Chân 13 | OC2_N — Port 2 overcurrent sense input (active low) |
| Chân 14 | PWR2_N — Port 2 power switch enable output (active low) |
| Chân 15 | VBUS_DN2 — Downstream port 2 VBUS detect input |
| Chân 16 | VBATT — Battery/supply input 3.15 V to 3.45 V |
| Chân 17 | VDD — Digital supply 3.3 V |
| Chân 18 | VCC5 — 5 V analog supply input |
| Chân 19 | GND — Ground reference |
| Chân 20 | XTALIN — 24 MHz crystal input |
| Chân 21 | XTALOUT — 24 MHz crystal output |
| Chân 22 | GND — Ground reference |
| Chân 23 | RESET_N — Active-low reset input |
| Chân 24 | PM_N — Port Mode / suspend control (active low) |
| Chân 25 | SCL — I2C clock for EEPROM interface |
| Chân 26 | SDA — I2C data for EEPROM interface |
| Chân 27 | GND — Ground reference |
| Chân 28 | TMS — JTAG test mode select |
| Chân 29 | TCK — JTAG test clock |
| Chân 30 | TDI — JTAG test data input |
| Chân 31 | TDO — JTAG test data output |
| Chân 32 | TRST_N — JTAG test reset (active low) |
| Chân 33 | GND — Ground reference |
| Chân 34 | NC — Not connected (per datasheet) |
| Chân 35 | NC — Not connected (per datasheet) |
| Chân 36 | NC — Not connected (per datasheet) |
| Chân 37 | NC — Not connected (per datasheet) |
| Chân 38 | LED1 — Status LED driver output 1 |
| Chân 39 | LED2 — Status LED driver output 2 |
| Chân 40 | GND — Ground reference |
| Chân 41 | VBUS_UP_PRES — Upstream VBUS presence indicator |
| Chân 42 | SUSP_N — Suspend indicator output (active low) |
| Chân 43 | GND — Ground reference |
| Chân 44 | NC — Not connected (per datasheet) |
| Chân 45 | NC — Not connected (per datasheet) |
| Chân 46 | NC — Not connected (per datasheet) |
| Chân 47 | NC — Not connected (per datasheet) |
| Chân 48 | NC — Not connected (per datasheet) |
| Chân 49 | GND — Ground reference |
| Chân 50 | NC — Not connected (per datasheet) |
| Chân 51 | NC — Not connected (per datasheet) |
| Chân 52 | NC — Not connected (per datasheet) |
| Chân 53 | GND — Ground reference |
| Chân 54 | NC — Not connected (per datasheet) |
| Chân 55 | NC — Not connected (per datasheet) |
| Chân 56 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
CY7C65621-56LTXC phù hợp cho 6 Áp dụngs: USB 2.0 Hub / Docking Station, USB Monitor with Integrated Hub Ports, Embedded Motherboard / Single-Board Computer, Industrial USB Expansion Module, USB Printer / Consumer Peripheral Hub, USB Port Replicator / Docking Station for Laptops.
USB 2.0 Hub / Docking Station
The CY7C65621-56LTXC's 2-port USB 2.0 hub capability with single-TT transaction translation directly suits USB hubs and docking stations that expand one upstream port into two. According to the Infineon datasheet, the integrated per-port overcurrent detection and ganged power switching eliminate the need for external USB power switches, reducing BOM cost by 4-6 components compared to discrete hub implementations. Placed as the central hub IC on a 4-layer PCB, it accepts the host's 5 V VBUS through a 3.3 V LDO and feeds downstream DP/DM pairs with proper 90 ohm differential impedance. Designers favor this IC over multi-chip hub solutions because it consolidates the hub repeater, transaction translator, and serial interface engine into one 56-QFN footprint, allowing hubs as small as 35 mm x 25 mm with full USB-IF compliance.
Được đề xuất
USB Monitor with Integrated Hub Ports
USB monitors with built-in hub ports use the CY7C65621-56LTXC to expose two downstream USB 2.0 connections to the user for keyboard, mouse, or webcam. According to the Infineon datasheet, its 3.15 V to 3.45 V VBATT supply operates directly from the monitor's 3.3 V internal rail, and its low suspend current makes it compatible with Energy Star and EU ErP standby requirements. Mounted near the rear I/O cluster with the EPAD soldered to the monitor's chassis ground, the IC supports upstream connection to the monitor's embedded USB controller or directly to a PC video input cable. Designers prefer this part over discrete USB hubs because it operates over the 0C to +70C commercial temperature range, well suited for closed monitor chassis with internal convection cooling.
Được đề xuất
Embedded Motherboard / Single-Board Computer
Embedded motherboards and single-board computers (SBCs) use the CY7C65621-56LTXC to add two internal/external USB 2.0 ports to SoCs that natively provide only one USB controller. According to the Infineon datasheet, the 56-QFN 8x8 mm footprint fits within standard SBC layouts and integrates the USB 2.0 PHY, eliminating the need for external ULPI transceivers. Placed between the SoC's USB controller output and the board's USB connectors, it frees the SoC's native USB port for system-level tasks while exposing two user ports for peripherals. Engineers select this hub IC because it requires no driver on the host side and operates transparently with any USB-compliant operating system including Linux, Windows, and embedded RTOS variants.
Được đề xuất
Industrial USB Expansion Module
Industrial USB expansion modules use the CY7C65621-56LTXC to provide isolated or ruggedized USB 2.0 connectivity in factory automation systems, test fixtures, and industrial PCs. According to the Infineon datasheet, the part supports both bus-powered and self-powered modes, allowing it to operate directly from PLC backplanes with proper 5 V to 3.3 V regulation. Designed into DIN-rail modules, it delivers 480 Mbps high-speed throughput for industrial USB cameras, data loggers, and programming tools. Designers select this part because its 56-QFN package with EPAD provides robust thermal dissipation in sealed enclosures, and its commercial temperature range suits most indoor factory environments. For harsh outdoor or sub-zero industrial sites, the CY7C65621-56LTXIT industrial variant is recommended instead.
Được đề xuất
USB Printer / Consumer Peripheral Hub
USB printers and consumer peripherals integrate the CY7C65621-56LTXC to offer hub-style connectivity, allowing multiple USB devices to share a single host port on the printer itself. According to the Infineon datasheet, the IC supports full-speed and high-speed USB operation, ideal for connecting USB flash storage and printers over the same upstream cable. Its small 56-QFN footprint fits within the tight chassis of compact printers and multifunction devices, while the low suspend current meets energy-saving regulations for consumer electronics. Engineers favor this hub IC over discrete hubs because it integrates per-port overcurrent sensing, protecting the printer's main board from shorted USB peripherals that could otherwise damage the host system.
Được đề xuất
USB Port Replicator / Docking Station for Laptops
Port replicators and laptop docking stations use the CY7C65621-56LTXC to expose two USB 2.0 downstream ports from a single upstream USB-C or USB-A upstream port. According to the Infineon datasheet, the part's transparent USB 2.0 hub mode requires no firmware updates and is compatible with all major operating systems including Windows, Linux, and macOS. Deployed between the dock's upstream connector and the user-facing USB ports, it provides 480 Mbps high-speed USB 2.0 bandwidth for legacy peripherals such as mice, keyboards, and USB headsets. Designers choose this IC because it integrates the entire USB 2.0 hub function in a 56-QFN footprint, allowing ultra-thin docks under 10 mm height while maintaining full USB-IF compliance.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho CY7C65621-56LTXC — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | CY7C65621-56LTXIT | CY7C65621-56LTXCT | CY7C65631-56LTXI | CY7C65631-56LTXC |
|---|---|---|---|---|---|
| Package | 56-QFN (8x8 mm) | 56-QFN (8x8) - same | 56-QFN (8x8) - same | 56-QFN (8x8) - same | 56-QFN (8x8) - same |
| Brand | Infineon | Infineon - same | Infineon - same | Infineon - same | Infineon - same |
| USB Specification | USB 2.0 (480 Mbps) | USB 2.0 (480 Mbps) | USB 2.0 (480 Mbps) | USB 2.0 (480 Mbps) | USB 2.0 (480 Mbps) |
| Downstream Ports | 2 | 2 | 2 | 4 | 4 |
| Transaction Translator | Single-TT | Single-TT | Single-TT | Single-TT | Single-TT |
| Temperature Range | 0C to +70C (commercial) | -40C to +85C (industrial) | 0C to +70C (commercial) | -40C to +85C (industrial) | 0C to +70C (commercial) |
| Operating Voltage (VBATT) | 3.15 V to 3.45 V | 3.15 V to 3.45 V | 3.15 V to 3.45 V | 3.15 V to 3.45 V | 3.15 V to 3.45 V |
| Reel / Tray Quantity | Tray (260 pieces) | Tape & Reel | Tape & Reel (2500) | Tape & Reel | Tray |
Bảo phân biệt quan trọng
- Single-TT 2-port topology at lowest BOM cost in HX2LP Lite family (vsCY7C65631-56LTXI)
- Commercial temperature grade optimized for indoor consumer products (vsCY7C65621-56LTXIT)
- Tray packaging for low-volume prototype and small-batch production (vsCY7C65621-56LTXCT)
Ghi chú thiết kế
Route the upstream and downstream USB DP/DM pairs as 90 ohm differential traces with continuous reference ground plane on the layer immediately below, matching USB 2.0 impedance specifications per USB-IF compliance. Place the 24 MHz crystal within 5 mm of the XTALIN/XTALOUT pins (pins 20-21) and shield the traces with a ground guard ring to prevent noise injection from switching regulators. The EPAD must be soldered to a grounded copper pour with at least 4 thermal vias to a second-layer ground plane for proper thermal dissipation and electrical reference.
Decouple VBATT (pin 16) with a 1uF ceramic capacitor and VDD (pin 17) with a 100nF ceramic capacitor placed within 2 mm of each pin. The VCC5 input (pin 18) requires a 10uF bulk capacitor to handle upstream VBUS transients at USB hot-plug events. For bus-powered applications, route the upstream VBUS through a 5 V to 3.3 V LDO such as the TPS7A4533 before reaching VBATT, and select an LDO with at least 500 mA current capacity to handle USB inrush currents.
Do not float the exposed pad; it MUST be soldered to ground for thermal and electrical reference, otherwise the die may overheat and exhibit erratic USB enumeration failures. Ensure the OC1_N (pin 7) and OC2_N (pin 13) overcurrent inputs are pulled up to logic high when unused, or connected to the USB power switch fault output per the reference schematic. The I2C EEPROM interface (SCL/SDA on pins 25-26) is optional and only required for custom VID/PID; leave unconnected for default Infineon VID/PID operation.
Keep the DP/DM trace length matching within 150 mil (3.8 mm) to maintain USB 2.0 signal integrity at 480 Mbps. Avoid routing USB traces parallel to switching power converter nodes; cross them at 90 degrees if necessary. Place ferrite beads on the upstream VBUS line and downstream VBUS lines to suppress EMI from the hub, especially in self-powered applications where multiple ports switch concurrently.
Thông tin tuân thủ
RoHS and lead-free compliance confirmed per Infineon product page. AEC-Q100 not applicable for commercial-grade hub controller; CY7C65621-56LTXIT industrial variant available for harsh environments. Halogen-free status not explicitly stated in verified web data.
