Datasheet

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
1
VDD33
2
USBDP_DN1/PRT_DIS_P1
3
USBDM_DN2/PRT_DIS_M2
4
USBDP_DN2/PRT_DIS_P2
5 6
USBDM_DN1/PRT_DIS_M1
NC
USBDM_UP
17
SUSP_IND/LOCAL_PWR/(NON_REM0)
16
VBUS_DET RESET_N
15 14
SMBCLK/CFG_SEL0 VDD33
18 13
SMBDATA/NON_REM1
Indicates pins on the bottom of the device.
OCS1_N
PRTPWR1/(BC_EN1)
VDD33
CRFILT
PRTPWR2
OCS2_N
USB2422
(Top View SQFN-24)