Texas Instruments TUSB3200CPAHG4

Overview

TUSB3200CPAHG4 from Texas Instruments is a USB Streaming Controller (STC) IC designed for isochronous digital audio streaming in USB peripheral devices. It integrates an 8052 MCU core, USB 1.1 full-speed transceiver (12 Mb/s), adaptive clock generator (ACG), four-channel DMA, and configurable CODEC port interface supporting AC'97 1.X/2.X and I2S protocols - enabling direct connection to stereo DACs/ADCs in digital speaker systems.

For engineers reviewing the TUSB3200CPAHG4 datasheet, TUSB3200CPAHG4 pinout, TUSB3200CPAHG4 application, or TUSB3200CPAHG4 equivalent, key selection considerations include USB Audio Class 1.0 compliance, ACG-supported synchronization modes (asynchronous/synchronous/adaptive), 52-pin TQFP package with 5-V-tolerant CODEC I/O, and dual master clock outputs (MCLKO/MCLKO2) for multi-CODEC timing distribution.

Technical Context

The TUSB3200CPAHG4 implements a dedicated USB Audio Class 1.0 peripheral architecture with on-chip 4 KB ROM boot loader and 8 KB RAM for firmware execution. Its USB Serial Interface Engine (SIE) handles control, interrupt, bulk, and isochronous transfers - supporting up to seven IN and seven OUT endpoints beyond the default control endpoint.

Its Adaptive Clock Generator (ACG) derives precise CODEC master clocks from USB SOF timing or external crystal (6 MHz), enabling jitter-tolerant audio streaming. The CODEC Port Interface operates in AC'97 or I2S mode with programmable slot assignments, while the 4-channel DMA routes isochronous data directly between USB buffers and CODEC serial lanes without MCU intervention.

Key Specifications

Pinout & Package

Package: 52-pin TQFP (PAH), 10 mm × 10 mm, 0.5 mm pitch, exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB audio peripheral controller applications.

Compared with CY7C68013A-56PVXC and CM108B-G, the TUSB3200CPAHG4 uniquely combines USB Audio Class 1.0 compliance, hardware ACG, and a fully configurable CODEC port - reducing firmware development effort and eliminating external clock components required by alternatives.

Availability

TUSB3200CPAHG4 is available at Aetrix Electronics and suitable for digital speaker systems, USB audio docking stations, PC gaming headsets, and USB-powered soundbars requiring stable component supply and long-term industrial availability.

Supply support for TUSB3200CPAHG4 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 technologies - with decades of experience in USB, audio, and mixed-signal IC design.

The TUSB3200 product line was engineered specifically for USB Audio Class 1.0 peripheral implementations, targeting low-latency, high-fidelity digital audio streaming in consumer and professional audio equipment.

FAQ

What USB Audio Class version does the TUSB3200CPAHG4 support?

The TUSB3200CPAHG4 supports USB Audio Class Specification v1.0, enabling plug-and-play stereo audio streaming on Windows, macOS, and Linux without custom drivers. Its USB Serial Interface Engine (SIE) and endpoint configuration blocks are fully compliant with descriptor structures and isochronous transfer requirements defined in that specification. The TUSB3200CPAHG4 implements all mandatory audio class interfaces including streaming, clock, and connector descriptors.

Does the TUSB3200CPAHG4 require an external crystal oscillator?

Yes, the TUSB3200CPAHG4 requires a 6-MHz fundamental-mode crystal connected to XTALI and XTALO pins to drive its on-chip oscillator and PLL. This crystal serves as the reference for generating the 48-MHz PLL output and downstream USB and CODEC clocks. The TUSB3200CPAHG4 does not support external clock input or ceramic resonator alternatives - only a parallel-resonant 6-MHz crystal with specified load capacitance (per SLAS240) ensures USB timing compliance.

Can the TUSB3200CPAHG4 interface with both 3.3-V and 5-V audio codecs?

Yes, the TUSB3200CPAHG4 features 5-V-tolerant I/O buffers on its CODEC Port Interface (CSCLK, CSYNC, CDATO, CDATI, CRESET, CSCHNE) and DVDDS supply pins, allowing direct connection to either 3.3-V or 5-V AC'97 and I2S codecs without level-shifting circuitry. This capability is explicitly documented in the "General Characteristics" section of the TUSB3200CPAHG4 datasheet and verified in terminal function descriptions for each C-Port signal.

How many USB isochronous endpoints can the TUSB3200CPAHG4 support simultaneously?

The TUSB3200CPAHG4 supports up to seven IN endpoints and seven OUT endpoints in addition to the default control endpoint - with each isochronous endpoint assignable to one of four DMA channels. While total endpoint count is 14, practical simultaneous isochronous streaming is constrained by DMA channel count (four) and buffer memory allocation. The TUSB3200CPAHG4 datasheet confirms four dedicated DMA channels, each capable of servicing one isochronous endpoint pair (IN+OUT) in full-duplex configurations.

What is the role of the Adaptive Clock Generator (ACG) in the TUSB3200CPAHG4?

The Adaptive Clock Generator (ACG) in the TUSB3200CPAHG4 synthesizes precise master clocks for external audio codecs by locking to USB Start-of-Frame (SOF) timing - enabling asynchronous, synchronous, or adaptive synchronization modes. It eliminates timing drift between USB host and CODEC sampling clocks, preventing audio dropouts or glitches. The ACG outputs (MCLKO/MCLKO2) are used directly by AC'97 or I2S codecs, and its operation is integral to the TUSB3200CPAHG4's USB Audio Class 1.0 compliance for isochronous streaming.