USB2422SLASHMJ datasheet(9/51 Pages) SMSC

9 / 51 page

2-Port USB 2.0 Hi-Speed Hub Controller

Datasheet

SMSC USB2422

Revision 1.0 (06-04-13)

DATASHEET

Chapter 2 Pin Descriptions

This chapter is organized by a set of pin configurations followed by a corresponding pin list organized

by function according to their associated interface. A detailed description list of each signal (named in

the pin list) is organized by function in Table 2.2, “USB2422 Pin Descriptions,” on page 11. Refer to

Table 2.3, “Buffer Type Descriptions,” on page 14 for a list of buffer types.

An N at the end of a signal name indicates that the active (asserted) state occurs when the signal is

at a low voltage level. When the N is not present, the signal is asserted when it is at a high voltage

level. The terms assertion and negation are used exclusively in order to avoid confusion when working

with a mixture of active low and active high signals. The term assert, or assertion, indicates that a

signal is active, independent of whether that level is represented by a high or low voltage. The term

negate, or negation, indicates that a signal is inactive.

2.1

Pin Configuration

Figure 2.1 USB2422 24-Pin SQFN

Thermal Slug

(must be connected to VSS)

USBDP_UP

XTALOUT/(CLKIN_EN)

XTALIN/CLKIN

RBIAS

PLLFILT

USBDM_UP

Indicates pins on the bottom of the device.

OCS1_N

PRTPWR1/(BC_EN1)

VDD33

CRFILT

PRTPWR2

OCS2_N

SMSC

USB2422

(Top View SQFN-24)

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