# TUSB2077APTR

**Texas Instruments** · USB Converters · LQFP-48(7x7)

TUSB2077APTR from Texas Instruments, in a LQFP-48(7x7). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | SUSPND | output | Suspend status output; active high during suspend mode, low for normal operation; 3-stated during low-power suspend. |
| 2 | DP0PUR | tri_state | Root port pullup resistor disable output; inactive (floating) for 15 ms after system reset or BUSPWR logic level change, then driven to VCC (3.3 V). |
| 3 | DP0 | bidirectional | Root port USB differential data plus; paired with DM0 to constitute the upstream USB port. |
| 4 | DM0 | bidirectional | Root port USB differential data minus; paired with DP0 to constitute the upstream USB port. |
| 5 | GND | power_in | Ground; must be tied to ground for proper operation. |
| 6 | RESET | input | Active low TTL input with hysteresis; initializes all logic when asserted at power up; recommended pulse width 100 μs to 1 ms after 3.3-V VCC reaches 90%. |
| 7 | EECLK | tri_state | EEPROM serial clock output; 3-state with 100-μA internal pulldown when EXTMEM is low; disabled and must be left floating when EXTMEM is high. |
| 8 | EEDATA/GANGED | bidirectional | When EXTMEM is high, selects ganged or per-port power overcurrent detection; when EXTMEM is low, acts as serial data I/O for EEPROM with 100-μA internal pulldown; must not change dynamically during operation. |
| 9 | VCC | power_in | 3.3-V supply voltage. |
| 10 | BUSPWR | input | Active-low power source indicator; indicates whether downstream ports source power from USB cable (pulled low) or local power supply (pulled to 3.3 V); input must not change dynamically during operation. |
| 11 | PWRON1 | output | Power-on/-off control signal for downstream port 1; active low, push-pull output that enables external power switch; cannot drive 5-V signals. |
| 12 | OVRCUR1 | input | Overcurrent input for downstream port 1; active low with noise filtering logic for immunity to voltage spikes. |
| 13 | DM1 | bidirectional | USB differential data minus for downstream port 1; paired with DP1 to support downstream USB port. |
| 14 | DP1 | bidirectional | USB differential data plus for downstream port 1; paired with DM1 to support downstream USB port. |
| 15 | PWRON2 | output | Power-on/-off control signal for downstream port 2; active low, push-pull output that enables external power switch. |
| 16 | OVRCUR2 | input | Overcurrent input for downstream port 2; active low with noise filtering logic. |
| 17 | DM2 | bidirectional | USB differential data minus for downstream port 2; paired with DP2 to support downstream USB port. |
| 18 | DP2 | bidirectional | USB differential data plus for downstream port 2; paired with DM2 to support downstream USB port. |
| 19 | PWRON3 | output | Power-on/-off control signal for downstream port 3; active low, push-pull output that enables external power switch. |
| 20 | OVRCUR3 | input | Overcurrent input for downstream port 3; active low with noise filtering logic. |
| 21 | DM3 | bidirectional | USB differential data minus for downstream port 3; paired with DP3 to support downstream USB port. |
| 22 | DP3 | bidirectional | USB differential data plus for downstream port 3; paired with DM3 to support downstream USB port. |
| 23 | PWRON4 | output | Power-on/-off control signal for downstream port 4; active low, push-pull output that enables external power switch. |
| 24 | GND | power_in | Ground; must be tied to ground for proper operation. |
| 25 | OVRCUR4 | input | Overcurrent input for downstream port 4; active low with noise filtering logic. |
| 26 | DM4 | bidirectional | USB differential data minus for downstream port 4; paired with DP4 to support downstream USB port. |
| 27 | DP4 | bidirectional | USB differential data plus for downstream port 4; paired with DM4 to support downstream USB port. |
| 28 | PWRON5 | output | Power-on/-off control signal for downstream port 5; active low, push-pull output that enables external power switch. |
| 29 | OVRCUR5 | input | Overcurrent input for downstream port 5; active low with noise filtering logic. |
| 30 | DM5 | bidirectional | USB differential data minus for downstream port 5; paired with DP5 to support downstream USB port. |
| 31 | DP5 | bidirectional | USB differential data plus for downstream port 5; paired with DM5 to support downstream USB port. |
| 32 | PWRON6 | output | Power-on/-off control signal for downstream port 6; active low, push-pull output that enables external power switch. |
| 33 | OVRCUR6 | input | Overcurrent input for downstream port 6; active low with noise filtering logic. |
| 34 | DM6 | bidirectional | USB differential data minus for downstream port 6; paired with DP6 to support downstream USB port. |
| 35 | DP6 | bidirectional | USB differential data plus for downstream port 6; paired with DM6 to support downstream USB port. |
| 36 | PWRON7 | output | Power-on/-off control signal for downstream port 7; active low, push-pull output that enables external power switch. |
| 37 | OVRCUR7 | input | Overcurrent input for downstream port 7; active low with noise filtering logic. |
| 38 | DM7 | bidirectional | USB differential data minus for downstream port 7; paired with DP7 to support downstream USB port. |
| 39 | DP7 | bidirectional | USB differential data plus for downstream port 7; paired with DM7 to support downstream USB port. |
| 40 | HUBCFG | output | Hub configured LED indicator control output; high when hub is configured (enables green LED), low when not configured (enables red LED); 3-stated during low-power suspend. |
| 41 | PORTPWR | output | Any port powered LED indicator control output; high when any port is powered on (enables green LED), low when all ports are off (enables red LED); 3-stated during low-power suspend. |
| 42 | PORTDIS | output | No ports disabled LED indicator control output; high when no port is disabled (enables green LED), low when any port is disabled (enables red LED); 3-stated during low-power suspend. |
| 43 | GND | power_in | Ground; must be tied to ground for proper operation. |
| 44 | XTAL2 | output | 6-MHz crystal oscillator output; must be left open when using an external oscillator. |
| 45 | XTAL1/CLK48 | input | Crystal 1/48-MHz clock input; 6-MHz crystal input with 50% duty cycle when MODE is low, 48-MHz clock input when MODE is high; internal APLL generates 48-MHz and 12-MHz clocks when MODE is low. |
| 46 | VCC | power_in | 3.3-V supply voltage. |
| 47 | EXTMEM | input | External memory enable input; when high, EEPROM interface is disabled and vendor/product IDs use defaults; when low, EECLK and EEDATA/GANGED pins are configured as EEPROM interface. |
| 48 | MODE | input | Mode select input; low selects APLL output clock and 6-MHz crystal input; high selects 48-MHz clock input and bypasses internal APLL. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | LQFP-48(7x7) |
| Category | Interface |
| Pins | 48 |

## CAD (KiCad official)

- Symbol: `TUSB2077APTR`
- Footprint: `Package_QFP:LQFP-48_7x7mm_P0.5mm`
- 3D model: LQFP-48(7x7) (KiCad packages3D, STEP)
- 3D model files: `tusb2077aptr-etched.step` / `tusb2077aptr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tusb2077aptr.step` / `tusb2077aptr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/tusb2077a) (29 pp, sha256 `84f556408dd203b4`, retrieved 2026-10-01, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/tusb2077aptr-datasheet.pdf)