USB2513 datasheet(57/63 Pages) MICROCHIP

部件名	USB2513

功能描述	USB 2.0 Hi-Speed Hub Controller

PDF	63 Pages

Scroll/Zoom	100%

制造商	MICROCHIP [Microchip Technology]

网页	http://www.microchip.com

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57 / 63 page

USB 2.0 Hi-Speed Hub Controller

Datasheet

SMSC USB251xB/xBi

Revision 2.2 (02-17-12)

DATASHEET

7.2

External Clock

50% duty cycle

± 10%, 24 MHz ± 350 ppm, jitter < 100 ps rms.

The external clock is recommended to conform to the signaling level designated in the JESD76-2

Specification

[5] on 1.2 V CMOS Logic. XTALOUT should be treated as a weak (<1mA) buffer output.

7.2.1

SMBus Interface

The SMSC hub conforms to all voltage, power, and timing characteristics and specifications as set

forth in the SMBus 1.0 Specification [3] for slave-only devices (except as noted in Section 5.3: SMBus

on page 42.

7.2.2

I2C EEPROM

Clock frequency is fixed at 60 kHz

± 20%.

7.2.3

USB 2.0

The SMSC hub conforms to all voltage, power, and timing characteristics and specifications as set

forth in the USB 2.0 Specification [1].

USB2513 数据表(PDF) 57 Page - Microchip Technology