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Texas Instruments TUSB2077APTRG4
- Part No.:
- TUSB2077APTRG4
- Manufacturer:
- Texas Instruments
- Category:
- Controllers
- Package:
- 48-LQFP
- Datasheet:
-
TUSB2077APTRG4.pdf
- Description:
- IC HUB CONTROLLER USB 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,473
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Product details
Overview
TUSB2077APTRG4 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 (via OVRCUR1–7), and 48-pin LQFP packaging - deployed in computer docking stations, keyboard/printer-embedded hubs, and monitor-integrated USB expansion systems.
For engineers reviewing the TUSB2077APTRG4 datasheet, TUSB2077APTRG4 pinout, TUSB2077APTRG4 application, or TUSB2077APTRG4 equivalent, key selection considerations include its 6-MHz crystal or 48-MHz clock input flexibility (MODE-selectable), EEPROM-programmable VID/PID support (EXTMEM-controlled), and push-pull PWRON outputs eliminating external pullups - all critical for embedded USB hub design, power management integration, and custom enumeration.
Technical Context
The TUSB2077APTRG4 implements a hardware state-machine architecture - no firmware or microcontroller required - enabling plug-and-play USB hub operation. It integrates seven downstream USB transceivers supporting both full-speed (12 Mbps) and low-speed (1.5 Mbps) devices via automatic slew-rate adaptation on DP/DM lines.
Power management is externally implemented using discrete switches (e.g., TPS2044), with the TUSB2077APTRG4 providing seven active-low PWRON control outputs and seven active-low OVRCUR inputs - configurable for either per-port or ganged overcurrent detection based on EXTMEM and EEDATA/GANGED logic states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| USB Compliance | Fully compliant USB 2.0 full-speed hub (TID #20240226); supports low-speed devices via auto-slew-rate configuration. |
| Port Count | 1 upstream (DP0/DM0) + 7 downstream ports (DP1–DP7/DM1–DM7); up to four downstream ports active in bus-powered mode. |
| Supply Voltage | 3.3 V nominal (3.0–3.6 V range); zero current draw in suspend mode (1 µA ICC). |
| Clock Options | Selectable 6-MHz crystal (XTAL1/XTAL2 + internal APLL) or 48-MHz external clock (XTAL1 only, MODE = high). |
| Power Control | Seven push-pull PWRON outputs (3.3-V compatible); eliminates need for external pullup resistors on power-switch enable lines. |
| Overcurrent Handling | Seven OVRCUR inputs (active-low, noise-filtered); supports per-port or ganged detection depending on EXTMEM/EEDATA/GANGED configuration. |
| EEPROM Interface | Optional 2-wire serial interface (EECLK/EEDATA) enabled by EXTMEM = low; stores custom VID/PID and GANGED mode setting. |
Pinout & Package
Package: 48-pin LQFP (7.00 mm × 7.00 mm), JEDEC S−PQFP−G compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DP0 / DM0 | Upstream differential data pair | Connects to host controller; forms root port of tiered USB topology. |
| DP1–DP7 / DM1–DM7 | Downstream differential data pairs | Support up to seven peripheral-facing ports; auto-detect full/low-speed device attachment. |
| BUSSPWR | Power source mode select | Active-low input: low = bus-powered (4 ports), high = self-powered (7 ports); static during operation. |
| PWRON1–PWRON7 | Port power enable outputs | Active-low push-pull signals driving external 5-V power switches; no external pullups needed. |
| OVRCUR1–OVRCUR7 | Overcurrent detection inputs | Active-low, noise-filtered inputs; used individually (per-port) or tied together (ganged) based on configuration. |
| EXTMEM | EEPROM interface enable | High = disable EEPROM; default VID/PID = "General Purpose USB Hub"; pins 7/8 repurposed as GANGED/unused. |
| MODE | Clock source select | Low = 6-MHz crystal + internal APLL; high = direct 48-MHz clock; determines XTAL1/XTAL2 usage. |
| SUSPND | Suspend status indicator | Active-high output signaling USB suspend state; used to gate external logic power-down. |
Key Features
| Feature | Design Value |
|---|---|
| No firmware required | Digital state-machine implementation eliminates microcontroller dependency and bootloader complexity. |
| Flexible clocking | Supports cost-optimized 6-MHz crystal (with suspend/resume) or high-accuracy 48-MHz oscillator - selected via MODE pin. |
| Configurable power management | Four operational modes (bus/ganged, bus/per-port, self/ganged, self/per-port) via BUSPWR + EXTMEM/EEDATA/GANGED. |
| LED status control | HUBCFG, PORTPWR, PORTDIS outputs provide real-time visual feedback for hub configuration, port power, and port disable states. |
| Robust signal integrity | Integrated USB transceivers with 7.1–19.9 Ω driver impedance, 4–20 ns rise/fall times (full-speed), and noise-filtered OVRCUR inputs. |
Applications
| Computer Docking Station | Monitor-Embedded USB Hub |
|---|---|
|
Use Scenario: Desktop docking station aggregating keyboard, mouse, printer, and scanner via single upstream USB connection. IC Role / Device Role / Timing Role: Central USB repeater and port multiplier; manages power sequencing, overcurrent isolation, and suspend/resume coordination across all downstream peripherals. Use Value: Enables compact, single-cable docking without host-side software modification; per-port power control prevents single-fault system shutdown. |
Use Scenario: LCD monitor with built-in USB 2.0 hub providing connectivity for webcam, headset, and flash drive alongside video input. IC Role / Device Role / Timing Role: Embedded hub controller handling enumeration, bandwidth arbitration, and dynamic power allocation to downstream ports while sharing monitor's 3.3-V rail. Use Value: Reduces BOM count by integrating transceivers and power control logic; push-pull PWRON outputs eliminate six external pullup resistors. |
| Keyboard-Integrated Hub | Printer-Embedded Hub |
|
Use Scenario: Mechanical keyboard with dedicated USB ports for charging phone and connecting secondary peripherals. IC Role / Device Role / Timing Role: Self-powered hub managing local 5-V distribution, overcurrent protection, and LED status indication (PORTPWR/HUBCFG) for user feedback. Use Value: Supports simultaneous full-speed HID (keyboard) and low-speed charging negotiation; EEPROM-programmable VID/PID enables branded enumeration. |
Use Scenario: Multifunction printer offering USB host capability for memory card readers or auxiliary scanners. IC Role / Device Role / Timing Role: Downstream hub controller interfacing with printer's SoC; handles hot-plug detection, suspend signaling, and power-state synchronization with print engine. Use Value: Enables seamless peripheral attach/detach without printer reboot; ganged overcurrent mode reduces external power switch count for cost-sensitive designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB hub applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TUSB2046B | 4-port hub; identical 48-pin LQFP package, same EEPROM interface, but lacks DP0PUR and HUBCFG pins. | Lower port count limits use to compact peripherals (e.g., compact keyboards, small printers); no DP0 pull-up disable simplifies bus/self-power switching. | Select when 4 downstream ports suffice and board space or cost constraints favor smaller hub footprint. |
| UPD720114 | 8-port hub with integrated USB 2.0 PHY; requires external 1.2-V/3.3-V supplies; supports transaction translator for mixed-speed topologies. | Enables true high-speed (480 Mbps) downstream support; not pin-compatible; requires additional power rails and layout changes. | Choose when high-speed peripheral support (e.g., external HDDs) is required and design can accommodate extra power domains. |
Compared with TUSB2077APTRG4, TUSB2046B offers reduced port count and simplified power switching at lower cost, while UPD720114 provides high-speed capability and transaction translation - but demands more complex power delivery and PCB routing.
Availability
TUSB2077APTRG4 is available at Aetrix Electronics and suitable for computer docking stations, monitor-embedded USB expansion, and keyboard/printer-integrated hub designs requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for TUSB2077APTRG4 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 leader specializing in analog, embedded processing, and connectivity solutions, with decades of USB protocol expertise and broad automotive/industrial qualification.
The TUSB2077APTRG4 belongs to TI's USB physical layer and hub controller product line, designed specifically for cost-sensitive, firmware-free USB 2.0 hub implementations in consumer electronics, peripherals, and embedded systems.
FAQ
What is the maximum number of downstream USB ports supported by the TUSB2077APTRG4 in self-powered mode?
The TUSB2077APTRG4 supports up to seven downstream USB ports when configured in self-powered mode, as indicated by pulling the BUSPWR pin high (3.3 V). In bus-powered mode (BUSSPWR pulled low), only four downstream ports are permitted per USB specification compliance. This port count limitation is enforced by internal logic and verified in the SLLS414F datasheet Section 3.
Does the TUSB2077APTRG4 require an external microcontroller or firmware to operate?
No, the TUSB2077APTRG4 operates autonomously using a digital state-machine architecture - no external microcontroller, firmware, or software programming is required. It enumerates as a standard USB hub and handles packet routing, suspend/resume, and port power control in hardware, as confirmed in the "Description" section of the SLLS414F datasheet.
Can the TUSB2077APTRG4 be used with a 48-MHz oscillator instead of a 6-MHz crystal?
Yes, the TUSB2077APTRG4 supports both clock sources: a 6-MHz crystal (XTAL1/XTAL2) with internal APLL generation of 48 MHz, or a direct 48-MHz clock applied to XTAL1 when MODE = high. The latter bypasses the APLL and oscillator cell, enabling higher clock accuracy but disabling low-power suspend if the oscillator cannot be halted - details are in Section 8.3.2 of SLLS414F.
How does the TUSB2077APTRG4 handle overcurrent detection - per-port or ganged?
The TUSB2077APTRG4 supports both configurations: per-port overcurrent detection uses individual OVRCUR1–OVRCUR7 inputs tied to separate power switches, while ganged mode ties all OVRCUR pins together and monitors a single point. The selection depends on EXTMEM and EEDATA/GANGED logic levels, as specified in Section 8.3.1 of the SLLS414F datasheet.
What is the function of the DP0PUR pin on the TUSB2077APTRG4?
The DP0PUR pin is an open-drain output that disables the upstream DP0 pull-up resistor for 15 ms after RESET assertion or BUSPWR logic-level change. This timing allows clean bus/self-power dynamic switching without enumeration conflicts - a hardware feature unique to the TUSB2077A family and documented in Pin Function Table Section 6 of SLLS414F.
TUSB2077APTRG4 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:
- -
TUSB2077APTRG4 FAQ
1.How can I place an order for TUSB2077APTRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TUSB2077APTRG4 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 TUSB2077APTRG4 reliable?
The price and inventory of TUSB2077APTRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TUSB2077APTRG4 is usually 5 days.
3.What payment methods are accepted for TUSB2077APTRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TUSB2077APTRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TUSB2077APTRG4?
TUSB2077APTRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TUSB2077APTRG4 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 TUSB2077APTRG4?
For technical support, including TUSB2077APTRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TUSB2077APTRG4 requirements.
6.How does Aetrix verify that TUSB2077APTRG4 is sourced from the original manufacturer or authorized distributors?
All TUSB2077APTRG4 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 TUSB2077APTRG4 meets industry standards.
7.What is the process for return or replacement of TUSB2077APTRG4?
All TUSB2077APTRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TUSB2077APTRG4, 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 TUSB2077APTRG4 part is unused and in its original packaging.
Return procedure for TUSB2077APTRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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