STMicroelectronics STDVE103ABTY

Overview

STDVE103ABTY from STMicroelectronics is a 3.4 Gbps adaptive TMDS/HDMI signal equalizer with integrated 3:1 HDMI switch, designed for high-fidelity video signal routing and cable loss compensation in HDMI 1.3-compliant systems. It features four differential TMDS channels, on-die 50 Ω input termination, 340 MHz clock support for deep-color video, and I²C DDC repeater functionality. Used in HDMI receiver front-ends to restore signal integrity over cables up to 25 m.

For engineers reviewing the STDVE103ABTY datasheet, STDVE103ABTY pinout, STDVE103ABTY application, or STDVE103ABTY equivalent, key selection criteria include adaptive equalization gain profile (3–16 dB across 225–1650 MHz), TQFP64 package thermal performance, HPD/SDA/SCL voltage tolerance (5.3 V), TMDS output skew (<100 ps), and I²C bus repeater operation at 0–400 kHz.

Technical Context

The device implements a fully automatic adaptive equalizer that applies frequency-dependent gain-3 dB at 225 MHz, rising to 16 dB at 1650 MHz-to compensate intersymbol interference (ISI) from lossy HDMI cables up to 25 m. Its 3:1 switch selects among three HDMI sources using S1/S2 control logic while preserving TMDS signal integrity via flow-through pinout and low-output-skew current-mode drivers.

It integrates an I²C DDC repeater supporting 0–400 kHz clocking with 5.3 V-tolerant SDA/SCL/HPD I/Os, lock-up free bus operation, and isolated DDC/HPD handling for unselected ports. All TMDS inputs feature internal 50 Ω ±5% termination to VCC (3.135–3.465 V), eliminating external resistors and reducing board space.

Key Specifications

Pinout & Package

TQFP64 (10 mm × 10 mm, 0.5 mm pitch) package with exposed thermal pad; optimized for low-jitter signal routing and thermal dissipation in HDMI video routing applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar HDMI signal conditioning and switching applications.

Compared with TDP142 and PI3HDX1204A, STDVE103ABTY uniquely combines adaptive equalization, 3:1 switching, and I²C DDC repeater in one TQFP64 package - reducing BOM count by 3–5 components and enabling robust HDMI link operation over variable-length cables up to 25 m without firmware tuning.

Availability

STDVE103ABTY is available at Aetrix Electronics and suitable for advanced TVs, front projectors, LCD monitors, and set-top boxes requiring stable component supply for HDMI 1.3 signal integrity management.

Supply support for STDVE103ABTY 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

STMicroelectronics is a global semiconductor leader specializing in analog, power, and automotive ICs, with broad expertise in high-speed interface solutions for consumer electronics.

STDVE103ABTY belongs to ST's HDMI signal conditioning product line, engineered specifically to address signal degradation in multi-source HDMI routing applications for TVs, projectors, and professional displays.

FAQ

What is the function of the REXT pin?

The REXT pin connects to ground via a 4.7 kΩ ±1% precision resistor to set the internal current-source reference for TMDS output drivers. This determines the output voltage swing (typically 400–600 mVpp differential) and ensures compliance with HDMI TMDS electrical specifications across process and temperature variations.

Can STDVE103ABTY operate without external termination on the output side?

No. While it integrates 50 Ω termination on all TMDS inputs, the Y1–Z4 outputs require external 50 Ω differential termination at the HDMI receiver end to establish correct load impedance and achieve specified voltage levels and signal integrity.

How does the adaptive equalizer adjust gain without configuration registers?

The equalizer uses analog feedback circuitry that continuously monitors incoming signal characteristics (e.g., zero-crossing density, amplitude decay) to automatically tune its frequency response. No I²C writes or external configuration are needed - gain adapts in real time to cable length and loss profile.

Is the I²C DDC repeater compatible with HDMI 2.0 or higher?

Yes - the repeater operates transparently at 0–400 kHz, matching HDMI 2.0/2.1 DDC timing requirements. However, the core TMDS switching and equalization remain HDMI 1.3–rated (3.4 Gbps), so it does not support HDMI 2.0's 6 Gbps+ data rates or enhanced features like HDR metadata passthrough.