USB2514I-AEZG Ver la hoja de datos (PDF) - SMSC -> Microchip

Número de pieza

componentes Descripción

Lista de partido

USB2514I-AEZG

Industrial Temperature Rated USB 2.0 High-Speed 4-Port Hub Controller

SMSC -> Microchip 

Industrial Temperature Rated USB 2.0 High-Speed 4-Port Hub Controller

Datasheet

Table 3.1 USB2514 Pin Descriptions (continued)

SYMBOL

CFG_SEL2

XTAL1/

CLKIN

XTAL2

RESET_N

36 QFN 48 QFN

n/a

33

33

45

32

44

26

34

BUFFER

TYPE

DESCRIPTION

I

Configuration Programming Select

Note: This pin is not available in all packages; it is

held to a logic ‘0’ when not available

The logic state of this pin is internally latched on the

rising edge of RESET_N (RESET_N negation), and will

determine the hub configuration method as described in

Table 3.2, "SMBus or EEPROM Interface Behavior"

MISC

ICLKx

Crystal Input/External Clock Input

24MHz crystal or external clock input.

This pin connects to either one terminal of the crystal or

to an external 24/48MHz clock when a crystal is not

used.

Note: 48MHz only available in 48 QFN.

OCLKx

Crystal Output

24MHz Crystal

This is the other terminal of the crystal, or pulled high

when an external clock source is used to drive

XTAL1/CLKIN. This output must not be used to drive

any external circuitry other than the crystal circuit.

IS

RESET Input

The system can reset the chip by driving this input low.

The minimum active low pulse is 1 us.

When the RESET_N pin is pulled to VDD33, the internal

POR (Power on Reset) is enabled and no external reset

circuitry is required. The internal POR holds the internal

logic in reset until the power supplies are stable.

SMSC USB2514i

13

DATASHEET

Revision 1.98 (11-19-07)

Share Link: