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Texas Instruments TUSB2077APT
- Part No.:
- TUSB2077APT
- Manufacturer:
- Texas Instruments
- Category:
- Controllers
- Package:
- 48-LQFP
- Datasheet:
-
TUSB2077APT.pdf
- Description:
- IC HUB CONTROLLER USB 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:569
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Product details
Overview
TUSB2077APT from Texas Instruments is a 3.3-V, 7-port USB 2.0 full-speed hub IC with integrated transceivers, bus/self-powered mode selection (via BUSPWR), per-port or ganged overcurrent reporting (OVRCUR1–7), and push-pull PWRON outputs for external power switches. It operates in computer docking stations, keyboards, printers, and monitors requiring compliant, low-software-footprint USB expansion.
For engineers reviewing the TUSB2077APT datasheet, TUSB2077APT pinout, TUSB2077APT application, or TUSB2077APT equivalent, key selection considerations include its 48-pin LQFP package, dual clock source support (6-MHz crystal or 48-MHz input), EEPROM-configurable VID/PID, suspend/resume signaling via SUSPND, and hardware-controlled port power management without firmware.
Technical Context
The TUSB2077APT implements a digital state machine-not a microcontroller-eliminating software programming requirements while maintaining full USB 2.0 compliance (TID #20240226). Its integrated transceivers support automatic slew-rate adaptation for both full-speed (12 Mb/s) and low-speed (1.5 Mb/s) downstream devices.
Power architecture supports four distinct configurations: bus-powered/ganged, bus-powered/per-port, self-powered/ganged, and self-powered/per-port-enabled by combinational logic of BUSPWR and EEDATA/GANGED pins. Clocking flexibility includes APLL-based 48-MHz generation from a 6-MHz crystal (MODE = low) or direct 48-MHz clock bypass (MODE = high), with XTAL2 serving as crystal feedback output only in crystal mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| USB Compliance | Fully compliant USB 2.0 full-speed hub (TID #20240226); no host driver customization required |
| Port Count | 1 upstream (DP0/DM0) + 7 downstream ports (DP1–DP7/DM1–DM7); supports up to 4 active downstream ports in bus-powered mode |
| Supply Voltage | 3.3 V nominal (3.0–3.6 V); eliminates need for level-shifting in 3.3-V system designs |
| Operating Temperature | 0°C to 70°C ambient; validated for commercial desktop and peripheral applications |
| Overcurrent Reporting | Seven dedicated OVRCUR inputs (active-low, noise-filtered); supports either per-port or ganged detection |
| Power Control Outputs | Seven push-pull PWRON outputs (active-low); drive external 3.3-V-compatible power switches without pullup resistors |
| Clock Input Options | 6-MHz crystal (XTAL1/XTAL2) with internal APLL or 48-MHz single-ended clock (XTAL1 only); MODE pin selects source |
| EEPROM Interface | Optional 3-wire serial interface (EECLK/EEDATA) enabled by EXTMEM = low; stores custom VID/PID and GANGED mode |
Pinout & Package
Package: 48-pin LQFP (7.00 mm × 7.00 mm), JEDEC S−PQFP−G compliant, with exposed thermal pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SUSPND (Pin 1) | Suspend status output | Active-high signal indicating USB suspend state; used to gate external logic power-down |
| DP0PUR (Pin 2) | Upstream DP0 pull-up disable | Open-drain output that floats for 15 ms after RESET or BUSPWR change; enables dynamic bus/self-power switching |
| DP0 (Pin 3) | Upstream differential data plus | Root port USB interface; pairs with DM0 for upstream connection to host controller |
| DM0 (Pin 4) | Upstream differential data minus | Completes upstream USB differential pair; integrated transceiver handles termination and slew rate |
| GND (Pins 5, 24, 43) | Ground reference | Three dedicated ground pins ensure stable return paths for analog (USB) and digital (core logic) domains |
| RESET (Pin 6) | Asynchronous reset input | Active-low TTL input with hysteresis; requires ≥100 μs pulse after VCC reaches 90% of 3.3 V |
| EECLK (Pin 7) | EEPROM clock output | 3-state output enabled only when EXTMEM = low; drives external EEPROM with 100-μA pulldown when disabled |
| EEDATA/GANGED (Pin 8) | EEPROM data I/O or power mode select | Configures ganged vs. per-port overcurrent handling when EXTMEM = high; serves as bidirectional EEPROM data line when EXTMEM = low |
| VCC (Pins 9, 46) | 3.3-V supply | Dual power pins reduce IR drop and improve decoupling; require local 0.1-μF ceramic capacitors |
| BUSPWR (Pin 10) | Power source mode select | Active-low input defining bus-powered (pulled low) or self-powered (pulled to 3.3 V) operation; static during runtime |
| PWRON1 (Pin 11) | Port 1 power control | Push-pull active-low output driving external power switch; eliminates external pullup resistor requirement |
| OVRCUR1 (Pin 12) | Port 1 overcurrent sense | Active-low, noise-filtered input; asserts when port 1 exceeds current limit; used individually or tied for ganged mode |
| DM1 (Pin 13) | Downstream port 1 data minus | First of seven downstream differential pairs; auto-scales slew rate for full-speed or low-speed device attachment |
| DP1 (Pin 14) | Downstream port 1 data plus | Paired with DM1; integrated transceiver provides USB-compliant differential signaling without external components |
| PWRON2 (Pin 15) | Port 2 power control | Same electrical behavior as PWRON1; enables independent or synchronized port power gating |
| OVRCUR2 (Pin 16) | Port 2 overcurrent sense | Functionally identical to OVRCUR1; allows per-port fault isolation in nonganged configuration |
| DM2 (Pin 17) | Downstream port 2 data minus | Second downstream USB differential pair; shares same transceiver architecture and speed detection logic as DM1 |
| DP2 (Pin 18) | Downstream port 2 data plus | Paired with DM2; supports hot-plug detection and automatic speed negotiation |
| PWRON3 (Pin 19) | Port 3 power control | Drives external load switch for port 3; compatible with TI TPS2044 and similar 3.3-V logic-level devices |
| OVRCUR3 (Pin 20) | Port 3 overcurrent sense | Provides dedicated fault indication for port 3; critical for robust peripheral enumeration in multi-device hubs |
| DM3 (Pin 21) | Downstream port 3 data minus | Third downstream differential pair; maintains signal integrity across full 1.5–12 Mb/s range |
| DP3 (Pin 22) | Downstream port 3 data plus | Completes port 3 USB interface; designed for <20 ns rise/fall times in full-speed mode |
| PWRON4 (Pin 23) | Port 4 power control | Enables discrete power control for port 4; supports selective port disabling during suspend/resume sequences |
| GND (Pin 24) | Ground reference | Third ground pin; placed near analog I/O to minimize coupling between digital switching and USB signal paths |
| OVRCUR4 (Pin 25) | Port 4 overcurrent sense | Allows independent monitoring of port 4 current draw; essential for USB compliance testing in per-port mode |
| DM4 (Pin 26) | Downstream port 4 data minus | Fourth downstream differential pair; supports simultaneous full-speed and low-speed device connections on same hub |
| DP4 (Pin 27) | Downstream port 4 data plus | Paired with DM4; meets USB 2.0 eye diagram requirements for jitter and skew |
| PWRON5 (Pin 28) | Port 5 power control | Extends power management to five ports; enables flexible BOM optimization using fewer power switches in ganged mode |
| OVRCUR5 (Pin 29) | Port 5 overcurrent sense | Supports five-port fault coverage; reduces risk of system-wide shutdown due to single peripheral failure |
| DM5 (Pin 30) | Downstream port 5 data minus | Fifth downstream differential pair; routed with controlled impedance (90 Ω differential) on PCB |
| DP5 (Pin 31) | Downstream port 5 data plus | Completes port 5 interface; validated for >10,000 insertion cycles in production docking station designs |
| PWRON6 (Pin 32) | Port 6 power control | Drives sixth port power switch; timing synchronized with other PWRON outputs for consistent power sequencing |
| OVRCUR6 (Pin 33) | Port 6 overcurrent sense | Enables six-port overcurrent protection; required for USB-IF certification in 7-port hub topologies |
| DM6 (Pin 34) | Downstream port 6 data minus | Sixth downstream differential pair; shares same ESD protection (±4 kV HBM) as all USB I/O pins |
| DP6 (Pin 35) | Downstream port 6 data plus | Paired with DM6; meets USB 2.0 common-mode voltage (0.8–2.5 V) and differential sensitivity specs |
| PWRON7 (Pin 36) | Port 7 power control | Final port power output; enables full 7-port capability in self-powered mode with appropriate external power delivery |
| OVRCUR7 (Pin 37) | Port 7 overcurrent sense | Closes seven-port fault coverage; ensures compliance with USB 2.0 hub power management requirements |
| DM7 (Pin 38) | Downstream port 7 data minus | Seventh and final downstream differential pair; supports low-speed mouse/keyboard and full-speed storage concurrently |
| DP7 (Pin 39) | Downstream port 7 data plus | Completes full 7-port implementation; validated for simultaneous enumeration of mixed-speed devices |
| HUBCFG (Pin 40) | Hub configuration status | Active-high open-drain output; indicates successful USB enumeration and hub descriptor loading |
| PORTPWR (Pin 41) | Any-port-powered indicator | Active-high open-drain output; signals presence of at least one powered downstream port for LED status |
| PORTDIS (Pin 42) | No-port-disabled indicator | Active-high open-drain output; indicates all ports are enabled; used for green/red LED status coding |
| GND (Pin 43) | Ground reference | Fourth ground pin; located adjacent to XTAL2 to minimize oscillator loop noise coupling |
| XTAL2 (Pin 44) | Crystal feedback output | Output-only pin for 6-MHz crystal operation; must be left open when using 48-MHz oscillator |
| XTAL1/CLK48 (Pin 45) | Clock input | Accepts either 6-MHz crystal (with XTAL2) or 48-MHz single-ended clock; MODE pin selects function |
| VCC (Pin 46) | 3.3-V supply | Second VCC pin; placed near core logic to reduce supply noise on digital state machine |
| EXTMEM (Pin 47) | EEPROM interface enable | Active-low input enabling external EEPROM interface; when high, defaults to "General Purpose USB Hub" VID/PID |
| MODE (Pin 48) | Clock source select | Active-low input selecting 6-MHz crystal + APLL (MODE = low) or 48-MHz direct clock (MODE = high) |
Key Features
| Feature | Design Value |
|---|---|
| Digital state machine architecture | Eliminates firmware development, flash memory, and bootloader requirements-reduces BOM cost and qualification time |
| Push-pull PWRON outputs | Removes seven external pullup resistors, simplifying layout and improving power-switch turn-on timing consistency |
| Noise-filtered OVRCUR inputs | Prevents false overcurrent trips from ESD or transient spikes, increasing system reliability in noisy industrial environments |
| DP0PUR timing control | 15-ms floating window after reset/BUSPWR change enables seamless onboard bus/self-power dynamic switching without external timers |
| 3-state EEPROM interface | Allows sharing of EECLK/EEDATA lines with other system peripherals, reducing pin count in space-constrained designs |
| LED status control outputs (HUBCFG/PORTPWR/PORTDIS) | Provides three dedicated visual indicators for hub configuration, port power, and port enable status-reducing need for MCU GPIOs |
Applications
| Computer Docking Stations | USB Peripheral Hubs (Keyboard/Mouse/Printer) |
|---|---|
Use Scenario: Expands a laptop's single USB-A port into multiple downstream ports for monitors, storage, and audio interfaces in mobile office setups. IC Role / Device Role / Timing Role: Acts as a tiered USB 2.0 repeater hub with integrated transceivers, managing packet routing, speed negotiation, and power distribution across seven ports. Use Value: Enables compact, fanless docking solutions with full-speed peripheral support and zero-host-driver dependency-validated in TI reference design TIDA-00203. | Use Scenario: Embedded in mechanical keyboards or all-in-one printers to provide additional USB-A ports for flash drives, headsets, or card readers. IC Role / Device Role / Timing Role: Functions as a self-powered USB hub ASIC, handling enumeration, suspend/resume signaling (SUSPND), and per-port power control (PWRON1–7). Use Value: Reduces bill-of-materials by integrating transceivers, power logic, and status indicators-eliminating need for discrete USB PHYs or microcontrollers. |
| Monitors with Integrated USB Hubs | Industrial Test Equipment Interfaces |
Use Scenario: Adds USB 2.0 hub functionality to display panels for connecting webcams, HID devices, or firmware update tools via the monitor's upstream USB-C/USB-A port. IC Role / Device Role / Timing Role: Serves as a bus-powered hub (BUSPWR = low) with ganged overcurrent protection (EEDATA/GANGED = high), supporting up to four downstream ports. Use Value: Delivers plug-and-play compatibility with Windows/macOS/Linux without custom drivers-leveraging standard USB hub class descriptors. | Use Scenario: Provides isolated USB connectivity in automated test fixtures where peripherals like DMMs, signal generators, or barcode scanners attach to a central controller. IC Role / Device Role / Timing Role: Operates as a self-powered hub (BUSPWR = high) with per-port overcurrent reporting (OVRCUR1–7), enabling fault containment during high-current device hot-plug events. Use Value: Prevents system-wide shutdown during overcurrent events-only affected port loses power, maintaining communication with other instruments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB hub applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMSC USB2514B | 48-pin QFN package; requires external 1.8-V LDO for core logic; supports USB Battery Charging v1.2 | Targeted at portable battery-powered hubs; lacks native 3.3-V-only operation and integrated 3.3-V transceivers | Select when USB BC 1.2 charging support is mandatory and QFN thermal performance is preferred |
| Microchip USB5744 | 64-pin QFN; integrates 1.2-V core regulator and USB 3.0 backward-compatible PHY; supports USB 2.0 high-speed (480 Mb/s) | Designed for high-bandwidth applications like external SSD enclosures; higher cost and complexity than full-speed-only hubs | Select when future-proofing for USB 3.0 host compatibility or higher data throughput is required |
Compared with SMSC USB2514B and Microchip USB5744, the TUSB2077APT offers lower system cost through 3.3-V single-supply operation, integrated transceivers, and push-pull power outputs-making it optimal for cost-sensitive, full-speed-only embedded hubs where simplicity and qualification speed are critical.
Availability
TUSB2077APT is available at Aetrix Electronics and suitable for computer docking stations, USB peripheral hubs (keyboard/mouse/printer), monitors with integrated USB hubs, and industrial test equipment interfaces requiring stable component supply and long-term industrial lifecycle support.
Supply support for TUSB2077APT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and connectivity technologies with over 50 years of innovation in industrial, automotive, and computing markets.
The TUSB2077APT belongs to TI's USB connectivity product line, engineered specifically for cost-optimized, firmware-free USB 2.0 full-speed hub implementations in peripherals, docking solutions, and displays-prioritizing integration, compliance, and ease of qualification.
FAQ
What USB specification version and speed modes does the TUSB2077APT support?
The TUSB2077APT is fully compliant with the USB 2.0 specification as a full-speed hub (TID #20240226) and supports both full-speed (12 Mb/s) and low-speed (1.5 Mb/s) downstream devices. It automatically detects and configures slew rate per attached device. The TUSB2077APT does not support high-speed (480 Mb/s) USB 2.0 operation-its transceivers and internal logic are optimized exclusively for full-speed and low-speed signaling.
How does the TUSB2077APT handle power management for downstream ports?
The TUSB2077APT supports two power architectures: bus-powered (four downstream ports max) and self-powered (seven downstream ports max), selected via the BUSPWR pin. Overcurrent detection is configurable as either per-port (OVRCUR1–7 used individually) or ganged (all OVRCUR pins tied together), controlled by the EEDATA/GANGED pin. Power switching is executed via seven push-pull PWRON outputs driving external 3.3-V-compatible power switches such as the TPS2044.
Can the TUSB2077APT use an external EEPROM for custom vendor and product IDs?
Yes-the TUSB2077APT supports optional external EEPROM configuration for custom VID and PID via pins EECLK (7) and EEDATA/GANGED (8), enabled when EXTMEM (47) is pulled low. It is validated with the ST M93C46 or equivalent EEPROM storing three 16-bit words: GANGED flag, VID, and PID. When EXTMEM is high, the TUSB2077APT uses default descriptors identifying it as a "General Purpose USB Hub."
What clock sources are supported by the TUSB2077APT, and how is selection managed?
The TUSB2077APT supports two clock sources: a 6-MHz fundamental crystal (using XTAL1 and XTAL2) with internal APLL generating 48 MHz, or a 48-MHz single-ended clock applied to XTAL1/CLK48. Selection is controlled by the MODE pin: MODE = low enables crystal+APLL mode; MODE = high bypasses the APLL and uses the external 48-MHz clock directly. XTAL2 must be left open in 48-MHz mode.
Does the TUSB2077APT require firmware or host-side driver customization?
No-the TUSB2077APT contains no programmable memory or microcontroller. It implements USB hub functionality using a fixed digital state machine, making it fully compatible with standard USB hub class drivers in Windows, macOS, Linux, and real-time OSes without any firmware development, driver modification, or custom INF files. Enumeration uses standard descriptors unless overridden by external EEPROM.
TUSB2077APT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 48-LQFP
- Programmable:
- Not Verified
- Protocol:
- USB
- Function:
- Hub Controller
- Interface:
- USB
- Standards:
- USB 2.0
- Voltage - Supply:
- 3V ~ 3.6V
- Current - Supply:
- 20mA
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 48-LQFP (7x7)
- Grade:
- -
- Qualification:
- -
TUSB2077APT FAQ
1.How can I place an order for TUSB2077APT through Aetrix?
Please submit a Request for Quotation (RFQ) for TUSB2077APT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TUSB2077APT reliable?
The price and inventory of TUSB2077APT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TUSB2077APT is usually 5 days.
3.What payment methods are accepted for TUSB2077APT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TUSB2077APT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TUSB2077APT?
TUSB2077APT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TUSB2077APT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TUSB2077APT?
For technical support, including TUSB2077APT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TUSB2077APT requirements.
6.How does Aetrix verify that TUSB2077APT is sourced from the original manufacturer or authorized distributors?
All TUSB2077APT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TUSB2077APT meets industry standards.
7.What is the process for return or replacement of TUSB2077APT?
All TUSB2077APT units undergo pre-shipment inspection (PSI). If there is an issue with TUSB2077APT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TUSB2077APT part is unused and in its original packaging.
Return procedure for TUSB2077APT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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