NXP Semiconductors TDA18273HN/C1

Overview

TDA18273HN/C1 from NXP Semiconductors is a hybrid silicon tuner IC for terrestrial and cable TV reception, supporting both analog and digital standards including DVB-T2 and DVB-C2. It delivers a low-IF (LIF) output (3–5 MHz center frequency) with 1.7/6/7/8/10 MHz selectable channel bandwidths, operates from a single 3.3 V supply, and integrates full IF selectivity-eliminating external SAW filters in set-top box and digital TV front-end designs.

For engineers reviewing the TDA18273HN/C1 datasheet, TDA18273HN/C1 pinout, TDA18273HN/C1 application, or TDA18273HN/C1 equivalent, key selection criteria include its multistandard RF coverage (42–870 MHz), 4.0 dB typical noise figure, 0.4° phase jitter (250 Hz–4 MHz), image rejection ≥57.5 dB, and I²C-bus interface compatibility with 3.3 V microcontrollers.

Technical Context

The TDA18273HN/C1 implements a fractional-N (FRAC-N) PLL-based architecture with integrated LC-VCO and crystal oscillator buffer (16 MHz), enabling fast tuning and alignment-free operation across global TV bands. Its RF input path includes band-split filtering (VHF/UHF), LNA with RFAGC, and IR mixer, while IF processing incorporates fully integrated IF filters and wideband gain control.

It features self-synchronizing AGC via VSYNC detection, a power level detector (PLD), and temperature sensor accessible over I²C. The device supports dual-mode demodulator interfacing: analog TV demodulators via LIF and digital channel demodulators for DVB-T/T2/C/C2, with strong immunity to spurious signals and field interference.

Key Specifications

Pinout & Package

HVQFN40 package (SOT618-1), 6 × 6 × 0.85 mm body, thermally enhanced, no leads, 40-terminal layout optimized for RF isolation and thermal dissipation in TV front-end modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar hybrid TV tuner applications.

Compared with TDA18273HN/C1, MAX3543ETJ+T offers broader RF headroom but sacrifices multistandard readiness and integration; SI2151-A10-GM reduces component count via on-die demodulation but removes analog TV capability and LIF configurability critical for hybrid deployments.

Availability

TDA18273HN/C1 is available at Aetrix Electronics and suitable for digital set-top boxes, hybrid broadcast TVs, professional monitoring receivers, and cable edge QAM systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for TDA18273HN/C1 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 headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and consumer electronics.

The TDA18273HN/C1 belongs to NXP's Silicon Tuner product line, engineered specifically for high-performance, multistandard TV reception in cost-sensitive, space-constrained consumer and professional broadcast equipment.

FAQ

What TV standards does the TDA18273HN/C1 support?

The TDA18273HN/C1 supports all major analog and digital TV standards, including NTSC, PAL, SECAM, DVB-T, DVB-T2, DVB-C, and DVB-C2. Its multistandard architecture enables single-hardware deployment across global markets without firmware or hardware modification. The TDA18273HN/C1 achieves this through programmable channel bandwidths (1.7–10 MHz) and configurable LIF center frequency (3–5 MHz), directly matching demodulator requirements for each standard.

Does the TDA18273HN/C1 require external SAW filters?

No, the TDA18273HN/C1 integrates full IF selectivity, eliminating the need for external SAW filters. This is achieved through on-chip IF filtering with programmable bandwidths and high out-of-band rejection. The TDA18273HN/C1's internal architecture reduces bill-of-materials cost and PCB area while maintaining signal integrity for both analog and digital demodulation paths.

What is the role of the VSYNC pin on the TDA18273HN/C1?

The VSYNC pin on the TDA18273HN/C1 accepts vertical synchronization pulses from analog video sources to enable self-synchronizing AGC mode. This feature ensures stable gain control during analog TV reception without requiring external timing references. In the TDA18273HN/C1, VSYNC input directly coordinates AGC step timing with video frame structure, minimizing luminance flicker and contrast instability.

Can the TDA18273HN/C1 operate from a single 3.3 V supply?

Yes, the TDA18273HN/C1 operates exclusively from a single 3.3 V supply (−0.3 V to +3.6 V absolute max), with I²C interface pins rated for 3.3 V logic levels. This eliminates the need for dual-rail power supplies or level shifters in system design. The TDA18273HN/C1's internal regulators and isolated ground domains maintain RF performance and digital integrity under this single-supply constraint.

How does the TDA18273HN/C1 handle image rejection?

The TDA18273HN/C1 achieves ≥57.5 dB worst-case image rejection at 4 MHz IF frequency through integrated RF band-splitting, high-linearity mixer design, and precision LO phase alignment. This performance is maintained across the full 42–870 MHz RF range without external image-reject filters. The TDA18273HN/C1's architecture meets ETSI and FCC requirements for co-channel interference suppression in dense RF environments.