RTS5411T-GR from Realtek Semicon, in a QFN-76(9x9). 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	RREF	passive	Bandgap reference. Connect an external 6.2K ohm (+/-1%) resistor from this pin to reference GND.
2	BPWR_DET	input	Upstream VBUS power detection pin. Active High (5V input buffer). 0 = upstream VBUS absent, 1 = upstream VBUS present.
3	DV11	power_in	1.1V power supply for digital circuits.
4	DV33	power_in	3.3V power supply for digital circuits (2.97-3.63V).
5	DSP2_DP	bidirectional	USB 2.0 D+ signal of Downstream Port 2.
6	DSP2_DM	bidirectional	USB 2.0 D- signal of Downstream Port 2.
7	AV11	power_in	1.1V power supply for analog circuits.
8	DSP2_SSTX+	output	USB 3.2 Gen1x1 SuperSpeed TX+ of Downstream Port 2.
9	DSP2_SSTX-	output	USB 3.2 Gen1x1 SuperSpeed TX- of Downstream Port 2.
10	OCP2	input	Over-current protection flag for downstream port 2. 5V input buffer with internal 10K pull-up (valid in 'power switch' mode). Active low by default (F/W-configurable). 0 = over-current detected.
11	DSP2_SSRX+	input	USB 3.2 Gen1x1 SuperSpeed RX+ of Downstream Port 2.
12	DSP2_SSRX-	input	USB 3.2 Gen1x1 SuperSpeed RX- of Downstream Port 2.
13	AV11	power_in	1.1V power supply for analog circuits.
14	DSP3_SSTX+	output	USB 3.2 Gen1x1 SuperSpeed TX+ of Downstream Port 3.
15	DSP3_SSTX-	output	USB 3.2 Gen1x1 SuperSpeed TX- of Downstream Port 3.
16	OCP3	input	Over-current protection flag for downstream port 3. 5V input buffer with internal 10K pull-up (valid in 'power switch' mode). Active low by default. 0 = over-current detected.
17	DSP3_SSRX+	input	USB 3.2 Gen1x1 SuperSpeed RX+ of Downstream Port 3.
18	DSP3_SSRX-	input	USB 3.2 Gen1x1 SuperSpeed RX- of Downstream Port 3.
19	AV11	power_in	1.1V power supply for analog circuits.
20	DSP3_DP	bidirectional	USB 2.0 D+ signal of Downstream Port 3.
21	DSP3_DM	bidirectional	USB 2.0 D- signal of Downstream Port 3.
22	DV33	power_in	3.3V power supply for digital circuits.
23	DSP4_DP	bidirectional	USB 2.0 D+ signal of Downstream Port 4.
24	DSP4_DM	bidirectional	USB 2.0 D- signal of Downstream Port 4.
25	AV11	power_in	1.1V power supply for analog circuits.
26	DSP4_SSTX+	output	USB 3.2 Gen1x1 SuperSpeed TX+ of Downstream Port 4.
27	DSP4_SSTX-	output	USB 3.2 Gen1x1 SuperSpeed TX- of Downstream Port 4.
28	OCP4	input	Over-current protection flag for downstream port 4. 5V input buffer with internal 10K pull-up. Active low by default. 0 = over-current detected.
29	DSP4_SSRX+	input	USB 3.2 Gen1x1 SuperSpeed RX+ of Downstream Port 4.
30	DSP4_SSRX-	input	USB 3.2 Gen1x1 SuperSpeed RX- of Downstream Port 4.
31	AV11	power_in	1.1V power supply for analog circuits.
32	GPIO0/SMBCL	bidirectional	General purpose I/O with weak internal 200K pull-up, 3.3V buffer. Default: LED for downstream port transmit/receive activity. Configurable as the SMBus clock (SMBCL) pin.
33	GPIO1/SMBDA	bidirectional	General purpose I/O with weak internal 200K pull-up, 3.3V buffer. Default: LED for downstream port over-current condition. Configurable as the SMBus data (SMBDA) pin.
34	GPIO2/SCL	bidirectional	General purpose I/O with weak internal 200K pull-up, 3.3V buffer. Default: LED for downstream port transmit/receive activity. Configurable as the I2C clock (SCL) pin.
35	GPIO3/SDA	bidirectional	General purpose I/O with weak internal 200K pull-up, 3.3V buffer. Default: LED for downstream port over-current condition. Configurable as the I2C data (SDA) pin.
36	GPIO4	bidirectional	General purpose I/O with weak internal 200K pull-up, 3.3V buffer. Default: LED for downstream port transmit/receive activity. Leave floating if unused.
37	GPIO5	bidirectional	General purpose I/O with weak internal 200K pull-up, 3.3V buffer. Default: LED for downstream port over-current condition.
38	GPIO6	bidirectional	General purpose I/O with weak internal 200K pull-up, 3.3V buffer. Default: LED for downstream port transmit/receive activity.
39	GPIO7	bidirectional	General purpose I/O with weak internal 200K pull-up, 3.3V buffer. Default: LED for downstream port over-current condition.
40	DSP1_PWR	output	External VBUS power switch enable for downstream port 1. Open-drain output, active low by default (F/W can configure active high; then uses 3.3V push-pull). 0 = VBUS on, 1 = VBUS off. Leave floating if unused.
41	DSP2_PWR	output	External VBUS power switch enable for downstream port 2. Open-drain, active low by default. 0 = VBUS on, 1 = VBUS off.
42	DSP3_PWR	output	External VBUS power switch enable for downstream port 3. Open-drain, active low by default. 0 = VBUS on, 1 = VBUS off.
43	DSP4_PWR	output	External VBUS power switch enable for downstream port 4. Open-drain, active low by default. 0 = VBUS on, 1 = VBUS off.
44	SCK	output	SPI clock output to external Serial Flash memory. 3.3V bi-directional buffer.
45	SCS	output	SPI chip-select output to external Serial Flash memory. 3.3V bi-directional buffer. Also sampled at power-on reset as a strap: 0 = execute code from internal ROM, 1 = execute code from external Serial Flash.
46	MISO	input	SPI data input from external Serial Flash memory. 3.3V bi-directional buffer.
47	MOSI	output	SPI data output to external Serial Flash memory. 3.3V bi-directional buffer.
48	DV33	power_in	3.3V power supply for digital circuits.
49	DV11	power_in	1.1V power supply for digital circuits.
50	DV11	power_in	1.1V power supply for digital circuits.
51	SWR_GND	power_in	Reference ground for the internal 1.1V switching regulator.
52	SWR_OUT	power_out	5V-to-1.1V internal switching regulator output. Leave floating if internal switching regulator is not used.
53	SWR_V5_IN	power_in	5V-to-1.1V switching regulator input (3.1-5.5V). Connect to LDO_V5_IN when internal switching regulator is not used.
54	LDO_V5_IN	power_in	5V-to-3.3V internal LDO input (4.5-5.5V). Short to DV33 when on-chip LDO is not used.
55	V33_OUT	power_out	3.3V output from the internal 5V-to-3.3V LDO. Short to DV33 when on-chip LDO is not used.
56	USP_DP	bidirectional	USB 2.0 D+ signal of the Upstream Port.
57	USP_DM	bidirectional	USB 2.0 D- signal of the Upstream Port.
58	AV11	power_in	1.1V power supply for analog circuits.
59	USP_SSTX-	output	USB 3.2 Gen1x1 SuperSpeed TX- of the Upstream Port.
60	USP_SSTX+	output	USB 3.2 Gen1x1 SuperSpeed TX+ of the Upstream Port.
61	GND	power_in	Reference ground.
62	USP_SSRX-	input	USB 3.2 Gen1x1 SuperSpeed RX- of the Upstream Port.
63	USP_SSRX+	input	USB 3.2 Gen1x1 SuperSpeed RX+ of the Upstream Port.
64	AV11	power_in	1.1V power supply for analog circuits.
65	DSP1_SSTX+	output	USB 3.2 Gen1x1 SuperSpeed TX+ of Downstream Port 1.
66	DSP1_SSTX-	output	USB 3.2 Gen1x1 SuperSpeed TX- of Downstream Port 1.
67	OCP1	input	Over-current protection flag for downstream port 1. 5V input buffer with internal 10K pull-up. Active low by default. 0 = over-current detected.
68	DSP1_SSRX+	input	USB 3.2 Gen1x1 SuperSpeed RX+ of Downstream Port 1.
69	DSP1_SSRX-	input	USB 3.2 Gen1x1 SuperSpeed RX- of Downstream Port 1.
70	AV11	power_in	1.1V power supply for analog circuits.
71	DSP1_DP	bidirectional	USB 2.0 D+ signal of Downstream Port 1.
72	DSP1_DM	bidirectional	USB 2.0 D- signal of Downstream Port 1.
73	DV33	power_in	3.3V power supply for digital circuits.
74	XTLI	input	12 MHz crystal oscillator input. 3.3V clock interface.
75	XTLO	output	12 MHz crystal oscillator output/drive. 3.3V clock interface.
76	SPWR_DET	input	Self-power detection pin. 5V input buffer, active high. 0 = bus-power setting, 1 = self-power setting.
EP	E-PAD	power_in	Exposed thermal pad on the bottom of the package. Must be connected to reference ground for thermal dissipation and electrical grounding.

Key specifications

Parameter	Value
Manufacturer	Realtek Semicon
Package	QFN-76(9x9)
Category	Interface
Pins	77

Ordering variants

Same part, different packaging or reel option.

RTS5411T-GR

CAD (KiCad official)

Symbol: RTS5411T-GR
Footprint: Package_DFN_QFN:QFN-76-1EP_9x9mm_P0.4mm_EP3.8x3.8mm
3D model: QFN-76(9x9) (KiCad packages3D, STEP)

Provenance

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

Datasheet: Realtek Semicon datasheet (32 pp, sha256 371452f35b4a4904, 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