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TUSB2036

Public Made by Adom

by adom

TI 3-port USB 2.0 full-speed hub, LQFP-32. Bus- or self-powered, ganged or per-port power. Datasheet-verified.

componentinterfaceusb-hubusb-2.0full-speedlqfp-32texas-instruments
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Contents

README

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TUSB2036

Texas Instruments · USB hub · LQFP-32

Turns one upstream USB port into three downstream ports, in a USB 2.0 full-speed hub. It handles the hub enumeration and per-port connect and power logic itself, with PWRON/OVRCUR pins for each port to switch and monitor downstream power, and a ganged or per-port power mode. It runs bus-powered or self-powered and takes an optional external EEPROM for custom descriptors. A simple, self-contained way to fan out a full-speed USB port.

Pinout

Pin Name Type Function
1 DP0 bidirectional Root port USB differential data plus. DP0 paired with DM0 constitutes the upstream USB port (full-speed, 12 Mb/s).
2 DM0 bidirectional Root port USB differential data minus. DM0 paired with DP0 constitutes the upstream USB port.
3 VCC power_in 3.3-V supply voltage (recommended 3.0-3.6 V).
4 RESET input Active-low TTL reset input with hysteresis. Must be asserted at power up; recommended pulse width 100 μs-1 ms after VCC reaches 90%. Clock must be active during the last 60 μs of the reset window.
5 EECLK output EEPROM serial clock. When EXTMEM is low, EECLK acts as a 3-state serial clock output to the EEPROM with a 100-μA internal pulldown. When EXTMEM is high the EEPROM interface is disabled and this pin must be left floating.
6 EEDATA/GANGED bidirectional Muxed EEPROM serial data / power-management mode indicator. When EXTMEM is low it is the serial data I/O for the EEPROM (100-μA internal pulldown). When EXTMEM is high it selects ganged vs. per-port overcurrent detection for the downstream ports; TTL input that must not change dynamically during operation.
7 GND power_in Ground reference. Must be tied to ground for proper operation.
8 BUSPWR input Active-low power-source indicator. Pull low for bus-powered mode or to 3.3 V for self-powered mode. Must not change dynamically during operation.
9 PWRON1 output Active-low push-pull power-on/off control for downstream port 1. Drives external 5-V power switch device; output cannot drive 5-V signals so the switch must accept 3.3-V logic inputs.
10 OVRCUR1 input Active-low overcurrent input for downstream port 1. Sampled every 2 ms with noise-filter logic (valid on two consecutive samples).
11 DM1 bidirectional USB downstream port 1 differential data minus.
12 DP1 bidirectional USB downstream port 1 differential data plus.
13 PWRON2 output Active-low push-pull power-on/off control for downstream port 2. Drives external 5-V power switch device (3.3-V compatible input required).
14 OVRCUR2 input Active-low overcurrent input for downstream port 2. Noise-filtered (sampled every 2 ms).
15 DM2 bidirectional USB downstream port 2 differential data minus.
16 DP2 bidirectional USB downstream port 2 differential data plus.
17 PWRON3 output Active-low push-pull power-on/off control for downstream port 3. Drives external 5-V power switch device (3.3-V compatible input required).
18 OVRCUR3 input Active-low overcurrent input for downstream port 3. Noise-filtered; has an internal pull-up that can be enabled for 2-port operation.
19 DM3 bidirectional USB downstream port 3 differential data minus.
20 DP3 bidirectional USB downstream port 3 differential data plus.
21 OCPROT/PWRSW input Dual-function active-low input. On a bus-powered hub (BUSPWR=GND) this is the overcurrent-protection implementation indicator (OCPROT); on a self-powered hub (BUSPWR=VCC) it is the power-switching implementation indicator (PWRSW). Logic high disables the internal pulldown.
22 NPINT0 input Number of ports internal to hub system (permanently attached), bit 0. See Table 1 in datasheet.
23 NPINT1 input Number of ports internal to hub system (permanently attached), bit 1. See Table 1 in datasheet.
24 NP3 input Active-low port-count select. Logic 0 configures the hub for 3 downstream ports; logic 1 configures for 2 downstream ports.
25 VCC power_in 3.3-V supply voltage (recommended 3.0-3.6 V).
26 EXTMEM input External-EEPROM enable. When high, the serial EEPROM interface is disabled and default VID/PID are used. When low, pins 5 and 6 act as the EEPROM clock and data pins.
27 DP0PUR output DP0 pullup-resistor enable. Floats (inactive) for ~15 ms after RESET or after any change on BUSPWR, then drives to VCC (3.3 V) until the next reset or BUSPWR change. Enables onboard bus/self-power dynamic switching.
28 GND power_in Ground reference. Must be tied to ground for proper operation.
29 XTAL2 output 6-MHz crystal output. Leave open when using an external oscillator/clock source.
30 XTAL1/CLK48 input Muxed crystal / 48-MHz clock input. When MODE is low, this is a 6-MHz crystal input (50% duty cycle) driving an internal APLL that generates the 48-MHz and 12-MHz core clocks. When MODE is high, this pin is driven by a 48-MHz external clock and the APLL is bypassed.
31 MODE input Clock-source mode select. Low = APLL output clock (6-MHz crystal or oscillator on XTAL1); high = XTAL1/CLK48 driven directly by a 48-MHz clock source.
32 SUSPND output Suspend-status output. Active-high; asserted high during USB suspend to allow external logic to power down. Low during normal operation.

Key specifications

Parameter Value
Type USB 2.0 full-speed hub
Ports 1 upstream, 3 downstream
Power Bus- or self-powered
Port power Ganged or per-port (PWRON / OVRCUR)
Descriptors Internal or external EEPROM
Supply 3.3 V
Package LQFP-32

Ordering variants

Same part, different packaging or reel option.

  • TUSB2036VF (LQFP-32)
  • TUSB2036IVF (LQFP-32, industrial)
  • TUSB2036IPT (LQFP-32)

CAD (KiCad official)

  • Symbol: Interface_USB:TUSB2036 (KiCad official)
  • Footprint: Package_QFP:LQFP-32_7x7mm_P0.8mm
  • 3D model: LQFP-32 (KiCad packages3D, STEP)
  • 3D model files: tusb2036-etched.step / tusb2036-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tusb2036.step / tusb2036.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (29 pp, sha256 66da8c4b2e0dd932, 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