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Microchip Technology USB2660-JZX
- Part No.:
- USB2660-JZX
- Manufacturer:
- Microchip Technology
- Category:
- Specialized
- Package:
- 64-VFQFN Exposed Pad
- Datasheet:
-
USB2660-JZX.pdf
- Description:
- IC INTERFACE SPECIALIZED 64QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,303
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Product details
Overview
USB2660-JZX from Microchip (formerly SMSC) is a USB 2.0 Hi-Speed hub and multi-format flash media controller IC integrating two exposed downstream USB 2.0 ports, dual SD interfaces (SD1/SD2), and support for SD/MMC/MS/xD media families. It features an on-chip 8051 microprocessor (60 MHz), 64 KB ROM, 9 KB RAM, integrated 1.8 V core regulator, and operates across 0°C to +70°C. It enables compact, low-BOM card reader hubs in desktop peripherals and embedded A/V systems.
For engineers reviewing the USB2660-JZX datasheet, USB2660-JZX pinout, USB2660-JZX application, or USB2660-JZX equivalent, key selection considerations include its dual-SD interface architecture, compound device configuration via I²C/SPI, PHYBoost signal integrity tuning, PortMap/PortSwap PCB layout flexibility, and xD-Picture Card licensing requirements.
Technical Context
The USB2660-JZX implements a fully compliant USB 2.0 hub with integrated transaction translator (TT), supporting concurrent Low-Speed, Full-Speed, and Hi-Speed downstream devices. Its flash media controller provides two independent SD interfaces: SD1 supports multiplexed SD/MS/xD protocols with shared pins, while SD2 is a dedicated non-multiplexed SD/SDIO slot for bridging applications.
Configuration is performed via external I²C EEPROM or SPI Flash, enabling customization of VID/PID, strings, port mapping, power control sequencing, and PHYBoost drive strength (4 levels). The 8051 core executes firmware from internal ROM or external SPI, and up to 20 GPIOs support LED control, UART, or custom functions - with two high-drive (200 mA) outputs featuring fold-back short-circuit protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| USB Compliance | USB 2.0 Hi-Speed hub with TT; supports LS/FS/HS downstream devices on all enabled ports |
| Downstream Ports | 2 exposed USB 2.0 ports + 1 internal port for compound flash reader (total 3-port hub) |
| Flash Media Support | SD 2.0 / MMC 4.2 / MS 1.43 / MS-Pro 1.02 / MS-Pro-HG 1.01 / xD 1.2 (license required) |
| Memory Resources | 64 KB on-chip ROM + 9 KB RAM; external SPI Flash or I²C EEPROM for configurable firmware/strings |
| Core Voltage | Internally regulated 1.8 V from single 3.3 V supply - eliminates external LDO, reduces BOM cost |
| Operating Temperature | 0°C to +70°C (commercial grade); USB2660-JZX is the commercial variant |
| Package | 64-pin QFN (9 × 9 mm, RoHS/halogen-free); exposed thermal pad requires VSS connection |
Pinout & Package
USB2660-JZX is housed in a 64-pin QFN package (9 mm × 9 mm, 0.5 mm pitch) with an exposed thermal pad that must be connected to VSS. Pin functions are validated per SMSC datasheet Rev. 1.1 (2010), including dual SD bus pin sharing (e.g., SD1_D0–D7 multiplexed with MS/xD signals) and dedicated SD2 signals (SD2_nCD, SD2_WP, SD2_D0–D1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| USBDN_DP2 / USBDN_DM2 | Downstream USB Port 2 differential pair | Directly connects to external USB Type-A receptacle; integrated 1.5 kΩ pull-downs and series termination |
| USBDN_DP3 / USBDN_DM3 | Downstream USB Port 3 differential pair | Internal connection to flash media reader as USB Compound Device; not exposed externally |
| SD1_CLK / SD1_D0–D7 / SD1_nCD / SD1_WP | Primary SD/MS/xD multiplexed interface | Shared pinout supports SD, Memory Stick, and xD protocols; mode selected by firmware initialization |
| SD2_nCD / SD2_WP / SD2_D0 / SD2_D1 | Secondary dedicated SD/SDIO interface | Non-multiplexed SD slot for SDIO bridging (e.g., WiFi/Bluetooth modules); no protocol sharing |
| GPIO6 / GPIO15–19 / GPIO17 | Configurable general-purpose I/O | Up to 20 GPIOs; two support 200 mA drive with fold-back current limiting for LED/switch control |
Key Features
| Feature | Design Value |
|---|---|
| PHYBoost | 4-level programmable USB transceiver drive strength restores signal integrity in marginal PCB layouts |
| PortSwap | Per-port reassignment of D+/D− pin locations aligns differential traces directly to connectors, eliminating crossovers |
| PortMap | Flexible disable/reordering of downstream ports ensures USB host port numbering matches physical layout |
| Dual SD Architecture | One multiplexed SD1 interface (SD/MS/xD) + one dedicated SD2 interface (SDIO bridging) enables simultaneous card reader and wireless module support |
| Single-Supply Operation | 3.3 V only powers entire IC; internal 1.8 V regulator supplies core logic, reducing external component count |
Applications
| Desktop Peripheral Hub | Embedded Media Player |
|---|---|
Use Scenario: USB expansion dock with integrated SD/MS card reader and front-panel USB ports. IC Role / Device Role / Timing Role: USB2660-JZX acts as a 3-port hub (2 external + 1 internal) and flash media controller, presenting itself as a compound USB device with separate hub and mass-storage interfaces. Use Value: Eliminates need for discrete hub + card reader ICs; reduces PCB area and BOM count while enabling >35 MB/s sustained read/write to SD/MS cards. |
Use Scenario: Portable media player with dual SD slots - one for user content (SD1), one for WiFi module (SD2). IC Role / Device Role / Timing Role: USB2660-JZX serves as host-side SDIO bridge (via SD2) and removable storage controller (via SD1), managed by internal 8051 firmware. Use Value: Enables coexistence of user-accessible storage and wireless connectivity on a single chip without external protocol translation logic. |
| Industrial Printer Controller | GPS Navigation Terminal |
Use Scenario: Multi-function printer with SD card slot for firmware updates and job storage. IC Role / Device Role / Timing Role: USB2660-JZX provides USB host connectivity to PC and manages SD card I/O using SD1 interface with configurable WP/nCD GPIOs. Use Value: Supports hot-plug detection (nCD), write-protection (WP), and robust ESD/EMI performance suitable for factory-floor environments. |
Use Scenario: In-vehicle GPS unit with SD card for map storage and optional Bluetooth hands-free module. IC Role / Device Role / Timing Role: USB2660-JZX uses SD2 for SDIO-based Bluetooth module communication and SD1 for map data access - both controlled via same firmware stack. Use Value: Dual SD interfaces allow concurrent operation: real-time BT audio streaming + background map reads without bus contention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB hub + flash media controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| USB2640-JZX | 2-port hub only; single SD interface (SD1); no SD2/SDIO support; 48-pin QFN | Lacks dual-SD capability and SDIO bridging; insufficient for WiFi/Bluetooth integration | Select when only basic SD card reader + 2 USB ports are required and SDIO is unnecessary |
| USB2514B-AEZG | 4-port USB 2.0 hub only; no flash media controller; no SD/MS/xD support; requires external card reader IC | Requires additional components for card reading; increases BOM, PCB area, and firmware complexity | Select when USB expansion is primary need and flash media functionality is handled separately |
Compared with USB2640-JZX and USB2514B-AEZG, the USB2660-JZX uniquely integrates dual SD interfaces - one multiplexed (SD1) and one dedicated (SD2) - enabling simultaneous removable storage and SDIO peripheral hosting without external logic, making it optimal for space-constrained, feature-rich embedded hosts.
Availability
USB2660-JZX is available at Aetrix Electronics and suitable for desktop peripherals, industrial printers, GPS navigation terminals, and embedded media players requiring stable component supply, dual-SD interface integration, and commercial-temperature USB hub functionality.
Supply support for USB2660-JZX includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology acquired SMSC in 2012 and now manufactures and supports the USB2660-JZX. SMSC was a pioneer in USB connectivity and embedded interface solutions before acquisition.
The USB2660-JZX belongs to SMSC's Ultra Fast USB Hub + Flash Media Controller product line, designed specifically for cost-sensitive, space-constrained embedded systems requiring integrated USB expansion and multi-format card reader functionality - especially where SDIO bridging (e.g., WiFi/Bluetooth) is needed alongside user-accessible storage.
FAQ
Does USB2660-JZX support xD-Picture Card, and what is required to enable it?
Yes, USB2660-JZX supports xD-Picture Card per specification v1.2, but activation requires a valid license from the xD-Picture Card License Office (Fuji, Olympus, Toshiba). Without this license, xD functionality remains disabled in firmware. Customers must represent they hold the license at time of purchase, and SMSC may discontinue supply if licensing lapses. USB2660-JZX hardware includes the necessary pin multiplexing (e.g., SD1_D0–D3, xD_nWP) to support xD when licensed.
What is the difference between the SD1 and SD2 interfaces on USB2660-JZX?
SD1 is a multiplexed interface supporting SD, MMC, Memory Stick, and xD protocols on shared pins - mode selection occurs during firmware initialization. SD2 is a dedicated, non-multiplexed SD/SDIO interface with fixed pin assignments (SD2_nCD, SD2_WP, SD2_D0/D1), intended for SDIO peripherals like WiFi or Bluetooth modules. USB2660-JZX uses SD2 exclusively for bridging, while SD1 handles user-accessible flash cards.
Can USB2660-JZX operate with only a 3.3 V supply, and how is core voltage generated?
Yes, USB2660-JZX operates from a single 3.3 V supply (VDD33). An integrated linear regulator generates the required 1.8 V core voltage internally, eliminating the need for an external LDO. This reduces BOM cost and board space. The regulator is optimized for low noise and stability under dynamic USB and flash media load conditions, and is validated across the full 0°C to +70°C operating range of USB2660-JZX.
How does PortSwap simplify PCB layout for USB2660-JZX?
PortSwap allows software-defined remapping of USB differential pair (D+/D−) pin locations per downstream port. For example, Port 2's D+/D− can be assigned to pins 2/3 or alternative pins (e.g., 14/15) via register configuration. This lets designers route USB traces straight to connectors without layer changes or differential pair crossovers - significantly easing layout in dense, multi-connector designs. USB2660-JZX supports PortSwap on all three downstream ports.
Is USB2660-JZX pin-compatible with USB2660i-JZX, and what is the key distinction?
Yes, USB2660-JZX and USB2660i-JZX share identical 64-pin QFN packaging, pinout, and electrical interface - they are drop-in replacements at the board level. The sole difference is temperature rating: USB2660-JZX is rated for 0°C to +70°C (commercial), while USB2660i-JZX extends to −40°C to +85°C (industrial). Firmware, configuration, and all functional features are identical; only thermal validation differs. USB2660-JZX is the commercial-grade variant specified in the JZX order code.
USB2660-JZX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 64-VFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Obsolete
- Applications:
- Controller
- Interface:
- -
- Voltage - Supply:
- 3.3V
- Supplier Device Package:
- 64-QFN (9x9)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
USB2660-JZX FAQ
1.How can I place an order for USB2660-JZX through Aetrix?
Please submit a Request for Quotation (RFQ) for USB2660-JZX on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for USB2660-JZX reliable?
The price and inventory of USB2660-JZX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for USB2660-JZX is usually 5 days.
3.What payment methods are accepted for USB2660-JZX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for USB2660-JZX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for USB2660-JZX?
USB2660-JZX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your USB2660-JZX order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for USB2660-JZX?
For technical support, including USB2660-JZX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your USB2660-JZX requirements.
6.How does Aetrix verify that USB2660-JZX is sourced from the original manufacturer or authorized distributors?
All USB2660-JZX products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that USB2660-JZX meets industry standards.
7.What is the process for return or replacement of USB2660-JZX?
All USB2660-JZX units undergo pre-shipment inspection (PSI). If there is an issue with USB2660-JZX, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The USB2660-JZX part is unused and in its original packaging.
Return procedure for USB2660-JZX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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