TUSB522PRGER from Texas Instruments, in a QFN-24-EP(4x4). Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	VCC	power_in	Positive power supply, 3.3 V nominal (3.0 V min, 3.6 V max).
2	EQ1	input	Channel 1 receiver equalizer gain select. 3-state CMOS input with integrated pull-up/pull-down. Low=3 dB, Mid=6 dB, High=9 dB.
3	DE2	input	Channel 2 output de-emphasis select. 3-state CMOS input with integrated pull-up/pull-down. Low=0 dB, Mid=-3.5 dB, High=-6.2 dB. Forced Low when OS=Low.
4	OS2	input	Channel 2 output swing (differential voltage amplitude) select. 2-state CMOS input with integrated pull-down. Low=0.9 mV, High=1.1 mV.
5	EN_RXD	input	Enable input. Device active when EN_RXD=High. Internal 660 kΩ pull-down; drive actively or install ~4.7 kΩ pull-up for normal operation. Resets state machine when Low.
6	NC	unconnected	No connection. May be tied to any voltage including GND.
7	NC	unconnected	No connection. May be tied to any voltage including GND.
8	RX1N	input	Channel 1 differential receiver input, negative (5 Gbps USB 3.1 GEN1).
9	RX1P	input	Channel 1 differential receiver input, positive (5 Gbps USB 3.1 GEN1).
10	GND	power_in	Ground. May be connected to GND or left unconnected (thermal PAD is the primary GND connection).
11	TX2N	output	Channel 2 differential transmitter output, negative (5 Gbps USB 3.1 GEN1).
12	TX2P	output	Channel 2 differential transmitter output, positive (5 Gbps USB 3.1 GEN1).
13	VCC	power_in	Positive power supply, 3.3 V nominal (3.0 V min, 3.6 V max).
14	RSV	input	Reserved. Can be left as no-connect.
15	OS1	input	Channel 1 output swing (differential voltage amplitude) select. 2-state CMOS input with integrated pull-down. Low=0.9 mV, High=1.1 mV.
16	DE1	input	Channel 1 output de-emphasis select. 3-state CMOS input with integrated pull-up/pull-down. Low=0 dB, Mid=-3.5 dB, High=-6.2 dB. Forced Low when OS=Low.
17	EQ2	input	Channel 2 receiver equalizer gain select. 3-state CMOS input with integrated pull-up/pull-down. Low=3 dB, Mid=6 dB, High=9 dB.
18	NC	unconnected	No connection. May be tied to any voltage including GND.
19	RX2P	input	Channel 2 differential receiver input, positive (5 Gbps USB 3.1 GEN1).
20	RX2N	input	Channel 2 differential receiver input, negative (5 Gbps USB 3.1 GEN1).
21	GND	power_in	Ground. May be connected to GND or left unconnected (thermal PAD is the primary GND connection).
22	TX1P	output	Channel 1 differential transmitter output, positive (5 Gbps USB 3.1 GEN1).
23	TX1N	output	Channel 1 differential transmitter output, negative (5 Gbps USB 3.1 GEN1).
24	NC	unconnected	No connection. May be tied to any voltage including GND.
PAD	GND	power_in	Exposed thermal pad on package bottom. Must be soldered to the PCB ground plane for electrical and thermal performance.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	QFN-24-EP(4x4)
Category	Interface
Pins	25

Ordering variants

Same part, different packaging or reel option.

TUSB522PRGER
TUSB522PRGERRGET

CAD (KiCad official)

Symbol: TUSB522PRGER
Footprint: Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.7x2.7mm
3D model: QFN-24-EP(4x4) (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Texas Instruments datasheet (24 pp, sha256 057e12f6ff5c79f5, retrieved 2026-08-17, tier: lcsc)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF