USB2422

DS00001726B-page 6

 2013 - 2015 Microchip Technology Inc.

2.0

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 7. Refer to Table 2-3, “Buffer Type Descriptions,” on page 10

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 nega-

tion 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)

12

11

10

9

8

7

USBDP_UP

19

XTALOUT/(CLKIN_EN)

20

XTALIN/CLKIN

21

RBIAS

24

23

PLLFILT

22

USBDM_UP

Indicates pins on the bottom of the device.

OCS1_N

PRTPWR1/(BC_EN1)

VDD33

CRFILT

PRTPWR2

OCS2_N

USB2422

(Top View SQFN-24)