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ISP1521
Datasheet
General description
The ISP1521 is a stand-alone Universal Serial Bus (USB) hub controller IC that complies with Universal Serial Bus Specification Rev. 2.0. It supports data transfer at high-speed (480 Mbit/s), full-speed (12 Mbit/s) and low-speed (1.5 Mbit/s).
The upstream facing port can be connected to a Hi-Speed USB host or hub or to an Original USB host or hub. If the upstream facing port is connected to a Hi-Speed USB host or hub, then the ISP1521 will operate as a Hi-Speed USB hub. That is, it will support high-speed, full-speed and low-speed devices connected to its downstream facing ports. If the upstream facing port is connected to an Original USB host or hub, then the ISP1521 will operate as an Original USB hub. That is, high-speed devices that are connected to its downstream facing ports will operate in full-speed mode instead.
The ISP1521 is a full hardware USB hub controller. All Original USB devices connected to the downstream facing ports are handled using a single Transaction Translator (TT), when operating in a cross-version environment. This allows the whole 480 Mbit/s upstream bandwidth to be shared by all the Original USB devices on its downstream facing ports.
The ISP1521 has seven downstream facing ports. If not used, ports 3 to 7 can be disabled. The vendor ID, product ID and string descriptors on the hub are supplied by the internal ROM; they can also be supplied by an external I2C-bus EEPROM or a microcontroller.
The ISP1521 is suitable for self-powered hub designs.
An analog overcurrent detection circuitry is built into the ISP1521, which can also accept digital overcurrent signals from external circuits; for example, Micrel MOSFET switch MIC2026. The circuitry can be configured to trip on a global or an individual overcurrent condition.
Each port comes with two status indicator LEDs.
Target applications of the ISP1521 are monitor hubs, docking stations for notebooks, internal USB hub for motherboards, hub for extending Intel Easy PCs, hub boxes, and so on.
Features
- Complies with:
- Universal Serial Bus Specification Rev. 2.0
- Advanced Configuration and Power Interface (ACPI), OnNow and USB power management requirements
- Supports data transfer at high-speed (480 Mbit/s), full-speed (12 Mbit/s) and low-speed (1.5 Mbit/s)
- Self-powered capability
- USB suspend mode support
- Configurable number of ports
- Internal Power-On Reset (POR) and low voltage reset circuit
- Port status indicators
- Integrates high performance USB interface device with hub handler, Philips Serial Interface Engine (SIE) and transceivers
- Built-in overcurrent detection circuit
- Individual or ganged power switching, individual or global overcurrent protection, and nonremovable port support by I/O pins configuration
- Simple I2C-bus (master or slave) interface to read device descriptor parameters, language ID, manufacturer ID, product ID, serial number ID and string descriptors from a dedicated external EEPROM, or to allow the microcontroller to set up hub descriptors
- Visual USB traffic monitoring (GoodLink) for the upstream facing port
- Uses 12 MHz crystal oscillator with on-chip Phase-Locked Loop (PLL) for low ElectroMagnetic Interference (EMI)
- Supports temperature range from -40 Cel to +70 Cel
- Available in LQFP80 package
Products/packages
| Type number | North American Type number | Ordering code (12NC) | Product status | Package | Packing | Marking | Chemical content | Leadfree conversion date |
|---|---|---|---|---|---|---|---|---|
| ISP1521BE | ISP1521BE-T | 9352 701 33518 | Volume production | SOT315-1
(LQFP80) | Reel Dry Pack, SMD, 13" | Standard Marking | ISP1521BE
| week 31, 2004 |
| ISP1521BE | ISP1521BE-S | 9352 701 33551 | Volume production | SOT315-1
(LQFP80) | Tray Dry Pack, Bakeable, Single | Standard Marking | ISP1521BE
| week 31, 2004 |
| ISP1521BE | ISP1521BE | 9352 701 33557 | Volume production | SOT315-1
(LQFP80) | Tray Dry Pack, Bakeable, Multiple | Standard Marking | ISP1521BE
| week 31, 2004 |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Indicative price/unit($) | Region | Distributor | In stock | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|
| ISP1521BE | 9352 701 33518 | NA | MOUSER ELECTRONICS | 587 | 7/20/2008 | Buy online | Order samples | |
| NA | DIGI-KEY CORPORATION | 564 | 7/22/2008 | Buy online | ||||
| ISP1521BE | 9352 701 33551 | not available | ||||||
| ISP1521BE | 9352 701 33557 | NA | DIGI-KEY CORPORATION | 1,012 | 7/22/2008 | Buy online | not available |
Applications
- Monitor hubs
- Docking stations for notebooks
- Internal hub for USB motherboards
- Hub for extending Easy PCs
- Hub boxes
Related applications
Motherboard components
Technical documents
Application Notes
Support Documents
UM10011_6;
ISP1521 Hi-Speed USB hub demo board (2007-02-07)
75015937;
NXP USB products (01-Feb-07)
Parametrics/similar products
| Type number | Package | Application | FEATURES | Other features | Operating/Supply Voltage (MAX.-Vcc,Vp,VDD)(V) | Bus interface | Downstream ports |
|---|---|---|---|---|---|---|---|
| ISP1521BE | SOT315-1
(LQFP80) | monitor, device bay, docking station, hub box | standalone single-chip pure hardware hub | WHQL for Win XP and Win 2000 | dual supply voltages 3.3 V and 5.0 V | USB at HS (480 Mbit/s), FS (12 Mbit/s) and LS (1.5 Mbit/s) data rates, I2C-bus | 7 |
Similar products
ISP1521 links to the similar products page containing an overview of products that are similar in function or related to the type number(s) as listed on this page. The similar products page includes products from the same catalog tree(s), relevant selection guides and products from the same functional category.
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