USB2514BI-AEZG-TR from Microchip, in a TQFN-36-EP(6x6). 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	USBDM_DN1/PRT_DIS_M1	bidirectional	Downstream USB 2.0 port 1 D- data line (analog IO-U). At RESET_N negation, doubles as PRT_DIS_M1 strap: pull both PRT_DIS_M1 and PRT_DIS_P1 high (47-100 k) to disable port 1.
2	USBDP_DN1/PRT_DIS_P1	bidirectional	Downstream USB 2.0 port 1 D+ data line (analog IO-U). Also serves as PRT_DIS_P1 disable strap (with PRT_DIS_M1) sampled at RESET_N negation.
3	USBDM_DN2/PRT_DIS_M2	bidirectional	Downstream USB 2.0 port 2 D- data line. Doubles as PRT_DIS_M2 disable strap sampled at RESET_N negation.
4	USBDP_DN2/PRT_DIS_P2	bidirectional	Downstream USB 2.0 port 2 D+ data line. Doubles as PRT_DIS_P2 disable strap.
5	VDDA33	power_in	3.3 V analog supply pin. Bypass locally to VSS.
6	USBDM_DN3/PRT_DIS_M3	bidirectional	Downstream USB 2.0 port 3 D- data line. Doubles as PRT_DIS_M3 disable strap sampled at RESET_N negation.
7	USBDP_DN3/PRT_DIS_P3	bidirectional	Downstream USB 2.0 port 3 D+ data line. Doubles as PRT_DIS_P3 disable strap.
8	USBDM_DN4/PRT_DIS_M4	bidirectional	Downstream USB 2.0 port 4 D- data line. Doubles as PRT_DIS_M4 disable strap sampled at RESET_N negation.
9	USBDP_DN4/PRT_DIS_P4	bidirectional	Downstream USB 2.0 port 4 D+ data line. Doubles as PRT_DIS_P4 disable strap.
10	VDDA33	power_in	3.3 V analog supply pin. Bypass locally to VSS.
11	TEST	input	Factory test pin with internal pull-down (IPD). Treat as no-connect or tie to ground; no trace or signal should be routed to this pin.
12	PRTPWR1/BC_EN1	output	Port 1 USB power enable output (O12, 12 mA) to the external port-power switch. At RESET_N negation the pin is sampled as BC_EN1 (IPD) strap: 1 = enable Battery Charging on port 1, 0 = disable.
13	OCS_N1	input	Over-current sense input for port 1 from an external current monitor. Active low; internal pull-up (IPU).
14	CRFILT	passive	VDD core regulator filter capacitor pin. Can have up to 0.1 uF low-ESR capacitor to VSS, or be left unconnected.
15	VDD33	power_in	3.3 V digital power supply. Bypass locally to VSS.
16	PRTPWR2/BC_EN2	output	Port 2 USB power enable output (O12, 12 mA). At RESET_N negation the pin is sampled as BC_EN2 strap to enable/disable Battery Charging on port 2.
17	OCS_N2	input	Over-current sense input for port 2 from an external current monitor. Active low; internal pull-up.
18	PRTPWR3/BC_EN3	output	Port 3 USB power enable output (O12, 12 mA). At RESET_N negation the pin is sampled as BC_EN3 strap to enable/disable Battery Charging on port 3.
19	OCS_N3	input	Over-current sense input for port 3 from an external current monitor. Active low; internal pull-up.
20	PRTPWR4/BC_EN4	output	Port 4 USB power enable output (O12, 12 mA). At RESET_N negation the pin is sampled as BC_EN4 strap to enable/disable Battery Charging on port 4.
21	OCS_N4	input	Over-current sense input for port 4 from an external current monitor. Active low; internal pull-up.
22	SDA/SMBDATA/NON_REM1	bidirectional	Serial data: I2C EEPROM data line or SMBus slave data (I/OSD12, open-drain, 12 mA sink). At RESET_N negation, also sampled as NON_REM1 strap (with NON_REM0) to mark ports as non-removable/compound-device.
23	VDD33	power_in	3.3 V digital power supply. Bypass locally to VSS.
24	SCL/SMBCLK/CFG_SEL0	bidirectional	Serial clock: I2C EEPROM clock or SMBus slave clock (I/OSD12, open-drain, 12 mA sink). Also latched on RESET_N rising edge as CFG_SEL0 to select configuration source per Table 5.1.
25	HS_IND/CFG_SEL1	bidirectional	Hi-Speed upstream port indicator (I/O12): asserted when hub connected at HS, negated at FS; can drive an LED. Also latched on RESET_N rising edge as CFG_SEL1 for configuration-source selection.
26	RESET_N	input	Active-low system reset input with Schmitt trigger (IS). Minimum active-low pulse width 1 us; strap pins are latched on rising edge (negation).
27	VBUS_DET	input	Upstream VBUS power detect input. Determines when the internal upstream D+ pull-up is asserted (connect event). For detachable hubs, connect to upstream VBUS via a 2:1 divider (two 100 k resistors); for self-powered fixed-host designs, tie to host control or the 3.3 V rail powering the host.
28	SUSP_IND/LOCAL_PWR/NON_REM0	bidirectional	Multi-function pin. As SUSP_IND: I/O status output indicating hub configured and active (asserted) vs unconfigured/suspend. As LOCAL_PWR: input indicating availability of local self-power (high = self-power available). Also sampled at RESET_N negation as NON_REM0 strap (with NON_REM1) to mark non-removable ports; can drive an LED.
29	VDDA33	power_in	3.3 V analog supply pin. Bypass locally to VSS.
30	USBDM_UP	bidirectional	Upstream USB 2.0 D- data line (analog IO-U). Connects to the host/upstream hub D-.
31	USBDP_UP	bidirectional	Upstream USB 2.0 D+ data line (analog IO-U). Connects to the host/upstream hub D+.
32	XTALOUT	output	24 MHz crystal driver output (OCLKx), 1.2 V p-p, weak (<1 mA) drive strength. Leave unconnected when driving XTALIN/CLKIN from an external oscillator.
33	XTALIN/CLKIN	input	24 MHz crystal input (ICLKx) or external 24 MHz clock input. Connect one crystal terminal here, or drive with an external 24 MHz single-ended clock.
34	PLLFILT	passive	PLL regulator filter capacitor pin. Can have up to 0.1 uF low-ESR capacitor to VSS, or be left unconnected.
35	RBIAS	passive	USB transceiver bias. Connect a 12.0 kOhm (+/-1%) resistor from this pin to ground to set the transceiver's internal bias.
36	VDDA33	power_in	3.3 V analog supply pin. Bypass locally to VSS.
37	VSS	power_in	Exposed ground pad (ePad). This is the ONLY VSS connection for the device and must be tied to ground with multiple vias for both electrical and thermal performance.

Key specifications

Parameter	Value
Manufacturer	Microchip
Package	TQFN-36-EP(6x6)
Category	Interface
Pins	37

Ordering variants

Same part, different packaging or reel option.

USB2514BI-AEZG-TR

CAD (KiCad official)

Symbol: USB2514BI-AEZG-TR
Footprint: Package_DFN_QFN:QFN-36-1EP_6x6mm_P0.5mm_EP3.7x3.7mm
3D model: TQFN-36-EP(6x6) (KiCad packages3D, STEP)

Provenance

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

Datasheet: Microchip datasheet (62 pp, sha256 23a2bdee11ebed45, retrieved 2026-08-17, tier: manufacturer)
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