TDA19989BET/C1,557 - 150MHz HDMI 1.4 TX | NXP Semiconductors

Set-Top Box HDMI Output

The TDA19989BET/C1,557 fits set-top box HDMI output stages because its 150 MHz pixel rate covers 1080p60 and its integrated HDCP 1.3 cipher satisfies conditional-access content requirements that broadcasters mandate. The three 8-bit parallel video inputs accept ITU656 streams directly from cable, satellite, or IPTV SoCs without external conversion logic, and the I2C register interface allows the host processor to manage timing, audio, and HDCP authentication. In the transmit path, the device serializes video and audio into TMDS lanes routed as 100-ohm differential pairs to the HDMI connector. The trade-off versus native-TMDS SoCs is added board area and power, but the benefit is freedom to choose any low-cost video SoC while retaining certified HDMI 1.4 and CEC functionality.

Digital Television and Monitor Boards

Television and monitor main boards use the TDA19989BET/C1,557 when an internal scaler chip outputs parallel RGB or ITU656 video instead of TMDS. The CEA-861B and DVI 1.0 compliance ensures interoperability with the broad installed base of HDMI and DVI sources, while HDCP 1.3 decryption-enabled transmission satisfies studio content rules for consumer displays. At a 150 MHz pixel rate, all HDTV formats up to 1080p60 are supported; the 4.5 x 4.5 mm 64-TFBGA keeps the transmitter footprint small on densely routed TV motherboards. CEC support lets the TV remote control connected source devices over the HDMI cable. Designers should plan for the I2C control link and verify sink-side EDID handling in firmware to pass HDMI compliance testing.

Projectors and AV Receivers

In projectors and AV receivers, the TDA19989BET/C1,557 provides the HDMI 1.4 transmit side for on-screen menus, upconverted video output, or pass-through stages. Its HDCP 1.3 engine allows re-transmission of protected content after internal processing, which AV receivers require when forwarding sources to a display. The 150 MHz pixel rate handles 1080p60 video formats typical of these products, and three 8-bit video inputs accommodate multiple internal processing paths via I2C-controlled multiplexing. Layout effort centers on the TMDS differential pairs and the HDMI connector ESD protection; keeping pairs length-matched within datasheet skew limits preserves eye margins. The part trades off against integrated-solution chips on cost, but wins on certification coverage and design reuse across product tiers.

Embedded Video Output Modules

Industrial and embedded platforms - medical monitors, kiosks, machine-vision HMIs - often run SoCs or FPGAs that emit parallel digital video. The TDA19989BET/C1,557 bridges that parallel domain to a modern HDMI connector: the ITU656 input compatibility maps directly onto standard embedded video buses, and the I2C interface integrates easily with common microcontroller supervisory code. The 150 MHz pixel rate is sufficient for 1080p60 user interfaces and camera preview streams. Because the device handles serialization, encoding, and HDCP internally, firmware teams avoid implementing TMDS in FPGA fabric, saving logic resources. Designers must provision HDCP keys and budget a low-jitter reference clock; in exchange the board gains a standard, interoperable video output recognized by any HDMI display.

Automotive Infotainment Rear-Seat Displays

Rear-seat entertainment units and infotainment accessory displays benefit from the TDA19989BET/C1,557 when a media head unit must feed an external or secondary screen through HDMI. The 150 MHz pixel rate covers 1080p60 movie playback, and HDCP 1.3 is mandatory for playing protected streaming content from set-top or casting devices connected to the vehicle system. The compact 64-TFBGA package (4.5 x 4.5 mm) suits the tight board space of seat-back display modules, while CEC enables centralized control of source devices from the head unit. Note this commercial-grade part must be validated against automotive temperature and vibration requirements, or the appropriate qualified variant selected. Differential pair routing through the cabin-length HDMI cable should include common-mode filtering to meet electromagnetic compatibility targets.

Test and Measurement Video Generators

Video signal generators, production test fixtures, and HDMI protocol analyzers use the TDA19989BET/C1,557 as a programmable HDMI source. Its I2C control interface lets test firmware load arbitrary CEA-861B timing descriptors, so a single hardware platform can emit every HDTV format up to the 150 MHz pixel rate ceiling for sink compliance screening. The three 8-bit parallel inputs allow pattern data to be injected from an FPGA or pattern generator, while the HDCP 1.3 block supports protected-content test cases. Because repeatability matters in test equipment, designers value the deterministic TMDS serialization and documented register map. The main limitation is the 150 MHz ceiling: 4K and high-refresh formats require a different instrument path, so this part targets HD-class test stations.