ISP1520BD ST-Ericsson Inc, ISP1520BD Datasheet - Page 2

• Manufacturer Part Number: ISP1520BD
• Description: IC, CONTROLLER, USB HUB, 64-LQFP
• Manufacturer: ST-Ericsson Inc

Specifications of ISP1520BD

• Usb Type: USB Peripheral Controller
• Usb Version: 2.0
• Data Rate: 480Mbps
• No. Of Ports: 5
• Supply Voltage Range: 3V To 3.6V, 4.5V To 5.5V
• Digital Ic Case Style: QFP
• No. Of Pins: 64
• Package / Case: LQFP
• Applications: USB Hub/Microcontroller
• Interface: I²C
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Supply: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 568-1168; ISP1520BD,557

1. General description
The ISP1520 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 ISP1520 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 ISP1520
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 ISP1520 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 ISP1520 has four downstream facing ports. If not used, ports 3 and 4 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 I
microcontroller.
The ISP1520 is suitable for self-powered hub designs.
An analog overcurrent detection circuitry is built into the ISP1520, 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 ISP1520 are monitor hubs, docking stations for notebooks,
internal USB hub for motherboards, hub for extending Intel Easy PCs, hub boxes, and so
on.
ISP1520
Hi-Speed Universal Serial Bus hub controller
Rev. 04 — 28 April 2006
2
C-bus EEPROM or a
Product data sheet