Texas Instruments TUSB4020BIPHP

Overview

TUSB4020BIPHP from Texas Instruments is a two-port USB 2.0 hub IC with Multi-Transaction Translator (MTT) architecture, supporting high-speed (480 Mbps), full-speed (12 Mbps), and low-speed (1.5 Mbps) downstream connectivity. It features per-port/ganged power switching, battery charging support (CDP/DCP/AutoMode), and 48-pin HTQFP (PHP) packaging for industrial temperature operation (–40°C to 85°C). Used in docking stations and monitors requiring robust USB expansion with embedded charging capability.

For engineers reviewing the TUSB4020BIPHP datasheet, TUSB4020BIPHP pinout, TUSB4020BIPHP application, or TUSB4020BIPHP equivalent, key selection criteria include MTT hub topology, dual-mode battery charging compliance (YD/T 1591-2009), I²C/SMBus programmability, 24 MHz clock interface, and industrial-grade thermal performance (R_θJA = 31.8°C/W).

Technical Context

The TUSB4020BIPHP implements a true MTT hub architecture with two independent transaction translators and four asynchronous endpoint buffers per translator-enabling concurrent high-bandwidth transfers across both downstream ports without bottlenecking. Its USB 2.0 upstream port negotiates speed dynamically: high-speed mode activates only when the upstream host supports it; otherwise, downstream ports fall back to full/low-speed only.

Power management is configurable via hardware strapping (GANGED, FULLPWRMGMTz, PWRCTL_POL) or register control, supporting either individual port power switching with isolated overcurrent shutdown or ganged operation. Battery charging logic operates autonomously per port using BATEN[2:1] pins and registers, with DCP mode compliant to YD/T 1591-2009 and AutoMode enabling dynamic divider/DCP selection based on attached device detection.

Key Specifications

Pinout & Package

Package: 48-pin HTQFP (PHP), 9 mm × 9 mm body with exposed thermal pad. Industrial temperature grade (–40°C to 85°C).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB 2.0 hub applications.

Compared with USB2514B-AEZG and UPD720114GA-YL-C-A, the TUSB4020BIPHP uniquely combines dual-port MTT architecture with production-ready battery charging (CDP/DCP/AutoMode), industrial temperature range, and flexible configuration (OTP/I²C/SMBus), making it optimal for docking, monitor, and embedded hub designs requiring reliability and charging interoperability.

Availability

TUSB4020BIPHP is available at Aetrix Electronics and suitable for docking stations, industrial monitors, set-top boxes, and embedded KVM switches requiring stable component supply, long-term lifecycle support, and industrial temperature qualification.

Supply support for TUSB4020BIPHP 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 TUSB4020BIPHP belongs to TI's USB 2.0 hub product line, engineered for robust, low-power USB expansion in space-constrained industrial and consumer systems requiring embedded battery charging and flexible configuration.

FAQ

What USB speed modes does the TUSB4020BIPHP support on its downstream ports?

The TUSB4020BIPHP supports high-speed (480 Mbps), full-speed (12 Mbps), and low-speed (1.5 Mbps) on both downstream ports. High-speed operation is enabled only when the upstream port detects a high-speed capable host; otherwise, downstream ports operate at full/low-speed only. This behavior is automatic and requires no software intervention - the TUSB4020BIPHP performs real-time electrical environment detection on the upstream port to configure downstream speed capability.

Does the TUSB4020BIPHP support battery charging for connected devices, and which standards are implemented?

Yes, the TUSB4020BIPHP supports battery charging via three modes: Charging Downstream Port (CDP) compliant with USB Battery Charging Specification 1.2, Dedicated Charging Port (DCP) compliant with Chinese Telecommunications Industry Standard YD/T 1591-2009, and AutoMode that dynamically selects between divider-mode and DCP based on attached device detection. These modes are configurable per port using BATEN1/BATEN2 pins or registers, and require no host-side driver changes - the TUSB4020BIPHP handles all handshaking autonomously.

How is the TUSB4020BIPHP configured - does it require external memory or can it be programmed in-system?

The TUSB4020BIPHP supports multiple configuration methods: one-time programmable (OTP) ROM, external I²C EEPROM (100 kbps, address 0x50), or SMBus target interface (7-bit address 10001xyz). All methods allow customization of VID/PID, port removability, battery charging settings, and manufacturer strings. In-system programming is supported through the USB 2.0 upstream port using vendor-defined requests - enabling field updates without removing the TUSB4020BIPHP from the PCB.

What is the significance of the MTT (Multi-Transaction Translator) architecture in the TUSB4020BIPHP?

The MTT architecture in the TUSB4020BIPHP uses two independent transaction translators, each with four asynchronous endpoint buffers. This eliminates bandwidth contention between downstream ports during concurrent high-speed transfers - unlike single-TT hubs where multiple ports share one translator and suffer throughput degradation. As a result, the TUSB4020BIPHP delivers full 480 Mbps aggregate bandwidth across both downstream ports when used with compatible devices, making it ideal for docking stations and multi-peripheral hubs.

Can the TUSB4020BIPHP operate without an external crystal, and what are the clock requirements?

Yes, the TUSB4020BIPHP accepts either a 24 MHz crystal (connected between XI and XO pins) or a 24 MHz CMOS oscillator driving the XI pin directly (XO left unconnected). The internal oscillator is fully integrated - no external PLL components are needed. Clock trace layout must follow strict guidelines: keep XI/XO traces short, avoid crossing noisy signals, and maintain tight 90 Ω differential impedance for crystal layout. The TUSB4020BIPHP does not support other frequencies or external clock dividers - 24 MHz is mandatory for USB 2.0 timing compliance.