NXP Semiconductors TDA19998HL/C1,518

Overview

TDA19998HL/C1,518 from NXP Semiconductors is a 4:1 HDMI 1.4a-compliant switch IC with integrated auto-adaptive equalizer, supporting up to 2.25 Gbit/s per channel, Deep Color (36-bit), and 3D video formats. It features four independent HDMI inputs, one HDMI output, embedded EDID memory per input, and F3 fast-switching technology for zero-delay port transitions while maintaining HDCP 1.4 encryption integrity - deployed in AV receivers and HDMI switch boxes.

For engineers reviewing the TDA19998HL/C1,518 datasheet, TDA19998HL/C1,518 pinout, TDA19998HL/C1,518 application, or TDA19998HL/C1,518 equivalent, key selection considerations include its LQFP100 package, dual-supply operation (3.3 V / 1.8 V), I²C-controllable EDID management, robust 7 kV IEC 61000-4-2 ESD protection on HDMI inputs, and fail-safe idle-mode output behavior.

Technical Context

The TDA19998HL/C1,518 implements a fully auto-adaptive TMDS equalizer per input channel, enabling signal integrity over 30 m AWG24 cables at 1.5 Gbit/s or 20 m AWG26 at 2.25 Gbit/s. Its F3 technology monitors HDCP A0 state during input switching to avoid unnecessary resets, preserving encrypted stream continuity across ports.

It integrates five DDC-bus interfaces - four per HDMI input plus a fifth for VGA/SoC - with level-shifting, master-switch arbitration, and digital lock-up protection. Power management includes five distinct modes (Operating, Power-down, EDID-only, Idle, and Fail-safe), each with defined supply dependencies and register accessibility.

Key Specifications

Pinout & Package

Package: Lead-free LQFP100 (SOT407-1), 14 mm × 14 mm × 1 mm body, 0.5 mm pitch, 100 leads.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar HDMI switch applications.

Compared with TDA19998HL/C1,518, the TDA19997HL/C1,518 offers identical pinout but reduced Deep Color and 3D timing capability, while the TS3DV642RHBR provides higher channel count but no integrated EDID or equalization - making TDA19998HL/C1,518 uniquely suited for premium HDMI switching with autonomous content protection and signal integrity.

Availability

TDA19998HL/C1,518 is available at Aetrix Electronics and suitable for home theater AV receivers, HDMI switch boxes, 3D-TV input processors, and professional projector controllers requiring stable component supply, long-cable signal integrity, and HDCP 1.4-compliant routing.

Supply support for TDA19998HL/C1,518 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

NXP Semiconductors is a global semiconductor company specializing in secure connectivity solutions for automotive, industrial, and consumer electronics, with leadership in interface, audio/video, and security ICs.

The TDA19998HL/C1,518 belongs to NXP's Smart HDMI Switch family, designed specifically for high-fidelity, HDCP-aware multimedia routing in premium consumer AV equipment where zero-latency switching and long-cable reliability are mandatory.

FAQ

What HDMI standards does the TDA19998HL/C1,518 support?

The TDA19998HL/C1,518 complies with HDMI 1.4a, DVI 1.0, EIA/CEA-861D, and HDCP 1.4 specifications. It supports Deep Color up to 36-bit per pixel, all Data Island packets including 3D InfoFrames, and ATC/Tx eye diagram compliance for 1080p60 36-bit video. The TDA19998HL/C1,518 does not decode or modify packet content - it forwards all HDMI data transparently while maintaining encryption integrity.

How does the F3 technology in the TDA19998HL/C1,518 improve HDMI switching performance?

F3 technology in the TDA19998HL/C1,518 monitors the HDCP A0 authentication state of the active source and determines whether a reset is necessary during input switching. This avoids unnecessary HDCP re-authentication cycles, enabling instantaneous port-to-port transitions while preserving encrypted stream continuity - a key differentiator versus conventional HDMI switches that cause display blanking or handshake delays. The TDA19998HL/C1,518 achieves true zero-latency switching without compromising security.

Can the TDA19998HL/C1,518 operate without +5 V from HDMI sources?

Yes. The TDA19998HL/C1,518 can operate without +5 V from any HDMI source by using the dedicated AUX_5V pin to power its EDID memory and DDC-bus slave functionality. This enables reliable EDID access and source detection even with headless or cabled HDMI sources lacking +5 V output. When AUX_5V is supplied, the TDA19998HL/C1,518 maintains EDID content integrity and supports full DDC communication regardless of source power status.

What power modes does the TDA19998HL/C1,518 support, and how are they controlled?

The TDA19998HL/C1,518 supports five power modes: Operating, Power-off, EDID-only, Power-down (via PD pin), and Idle (auto-activated on input inactivity). Mode selection is determined by supply presence (+5 V, 3.3 V, 1.8 V), PD pin state, and internal activity detection. In EDID-only mode, only +5 V is required to retain EDID accessibility; in Power-down mode, all supplies remain active but TMDS output is disabled. The TDA19998HL/C1,518 manages transitions autonomously with no external reset pin needed.

Does the TDA19998HL/C1,518 require external termination resistors on HDMI inputs?

No. The TDA19998HL/C1,518 integrates 50 Ω single-ended termination resistors on all HDMI inputs, eliminating the need for external termination components. The R12K pin controls connection of these terminations to the 3.3 V supply; an external 12 kΩ ±1 % resistor is required on this pin to enable termination. This integration reduces PCB footprint, improves signal integrity consistency, and simplifies layout - especially critical for high-speed HDMI routing in space-constrained AV equipment.