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NXP Semiconductors TDA18252HN/C1,557
- Part No.:
- TDA18252HN/C1,557
- Manufacturer:
- NXP Semiconductors
- Category:
- Video Processing
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
TDA18252HN/C1,557.pdf
- Description:
- IC VIDEO SILICON TUNER 48HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,918
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Product details
Overview
TDA18252HN/C1,557 from NXP Semiconductors is a fully integrated silicon tuner IC for digital cable set-top boxes, supporting DVB-C and multi-standard reception (SCTE-40, J-QAM, NORDIG) across 41–1002 MHz, with on-chip IF selectivity, analog loop-through, and 4–5 MHz low-IF output. It operates from a single 3.3 V supply and dissipates ≤800 mW.
For engineers reviewing the TDA18252HN/C1,557 datasheet, TDA18252HN/C1,557 pinout, TDA18252HN/C1,557 application, or TDA18252HN/C1,557 equivalent, key selection considerations include SARFT compliance, elimination of external SAW filters and LNAs, I²C-controlled signal strength/temperature monitoring, and pin-to-pin compatibility with legacy can tuners in Chinese STB platforms.
Technical Context
The TDA18252HN/C1,557 implements a direct-conversion RF-to-low-IF architecture with integrated synthesizer, LNA, mixer, bandpass IF filter, and AGC control loop. Its on-die oscillators require no external crystal load components, and it delivers programmable IF outputs (4 MHz at 6 MHz BW, 4.5 MHz at 7 MHz BW, 5 MHz at 8 MHz BW).
It integrates analog loop-through functionality with dedicated RFIN and LT pins, supports I²C-bus readback of input signal strength and die temperature, and provides multiple standby modes to reduce system power consumption below 800 mW typical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Frequency Range | 41–1002 MHz: Covers full digital cable spectrum including extended UHF for China/India deployments. |
| Low-IF Output | 4–5 MHz: Enables direct interface to QAM demodulators like TDA10024HN without external IF filtering. |
| Noise Figure | 7 dB: Ensures adequate sensitivity for weak-cable-signal reception in dense urban deployments. |
| Phase Noise | –85 dBc @ 10 kHz: Meets stringent spectral purity requirements for high-order QAM (256-QAM) demodulation. |
| Power Dissipation | < 800 mW: Allows thermal design within compact STB enclosures without forced cooling. |
| Image Rejection | 60 dBc: Eliminates need for discrete image-rejection filters in front-end BOM. |
| CSO/CTB | 57/63 dBc: Supports multi-channel operation in headend-fed distribution networks. |
Pinout & Package
Package: HVQFN32 (5 mm × 5 mm, 0.5 mm pitch, exposed thermal pad).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RFIN | RF Input | Differential RF input port for 75 Ω coaxial cable signal; supports analog loop-through path when enabled. |
| LT | Loop-Through Output | Analog pass-through output enabling legacy analog TV support without external amplification. |
| SCL / SDA | I²C Interface | Two-wire serial bus for configuration, AGC control, and readback of signal strength/die temperature. |
| IFOUT_P / IFOUT_N | Differential Low-IF Output | AC-coupled 4–5 MHz differential IF output directly compatible with TDA10024HN demodulator inputs. |
| VIF_AGC | Analog AGC Voltage Output | DC voltage proportional to IF signal level; used by external demodulator (e.g., TDA10024HN) for gain control. |
| XTALP / XTALN | Clock Oscillator Inputs | Accepts 16 MHz fundamental-mode crystal; internal oscillator eliminates external load capacitors. |
| XTOUT_P / XTOUT_N | Buffered Clock Output | Differential 16 MHz clock output for synchronizing secondary tuners or channel decoders. |
Key Features
| Feature | Design Value |
|---|---|
| Fully integrated IF selectivity | Replaces external SAW filters, reducing BOM count by ≥3 components and PCB area by >15%. |
| On-chip analog loop-through | Enables dual-mode (digital + analog) STB operation in SARFT-compliant markets without external RF switches or amplifiers. |
| I²C-accessible signal strength indicator | Allows real-time RF input monitoring and adaptive AGC tuning without external ADC or detector diodes. |
| Single 3.3 V supply operation | Eliminates need for dedicated 5 V or 1.8 V rails, simplifying power architecture and reducing DC-DC converter count. |
| Pin-to-pin compatibility with can tuners | Permits drop-in replacement in existing Chinese-market STB designs using OM3865C/C1 reference layout. |
Applications
| DVB-C Set-Top Box (China) | DVB-C Set-Top Box (India) |
|---|---|
Use Scenario: Deployment in urban apartment buildings with degraded cable signal integrity and coexistence of analog broadcast legacy. IC Role / Device Role / Timing Role: Primary RF tuner providing multi-standard digital cable reception with analog loop-through and I²C-managed AGC. Use Value: Meets SARFT certification via integrated loop-through and eliminates external SAW filters, reducing total front-end BOM cost by ~$1.20/unit. | Use Scenario: Mass-market STB production targeting rural cable networks with variable signal levels and limited infrastructure upgrades. IC Role / Device Role / Timing Role: Single-chip tuner delivering 41–1002 MHz coverage, 7 dB noise figure, and on-die temperature sensing for thermal derating. Use Value: Enables stable 256-QAM demodulation under low-SNR conditions while supporting field firmware updates via I²C register access. |
| DVR-Enabled Dual-Tuner STB | Reference Design Integration (OM3853C/C1) |
Use Scenario: Consumer DVR requiring simultaneous record-and-playback of two digital cable channels. IC Role / Device Role / Timing Role: First tuner in dual-tuner architecture, providing buffered 16 MHz XTOUT clock to synchronize second tuner and demodulator timing. Use Value: Shared clocking eliminates inter-tuner jitter and enables precise time-shift recording without external clock distribution ICs. | Use Scenario: Rapid prototyping of compliant STB designs using NXP's OM3853C/C1 evaluation platform. IC Role / Device Role / Timing Role: Core RF front-end IC paired with TDA10024HN demodulator, with AGC voltage feedback and low-IF interface. Use Value: Reduces development cycle from 12 to <6 weeks by providing validated layout, EMI-shielded package, and pre-characterized IF matching network. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital cable tuner applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX3542ETJ+T | Requires external 27 MHz crystal; lacks integrated analog loop-through; higher 950 mW power dissipation. | Targeted at North American QAM-only systems; not certified for SARFT or J-QAM standards. | Select when 27 MHz system clock is already available and analog loop-through is unnecessary. |
| SI2151-A10-GM | Supports DVB-C only (no SCTE-40/J-QAM); uses 24.545 MHz crystal; no on-die temperature sensor. | Optimized for cost-sensitive European cable markets; lacks I²C-accessible signal strength reporting. | Choose for single-standard deployments where SARFT compliance and analog pass-through are not required. |
Compared with MAX3542ETJ+T and SI2151-A10-GM, the TDA18252HN/C1,557 uniquely combines SARFT-compliant analog loop-through, multi-standard support (SCTE-40/J-QAM/NORDIG), and I²C-monitored thermal/signal metrics - enabling one-platform STB designs across India, China, and emerging Asian markets without hardware variants.
Availability
TDA18252HN/C1,557 is available at Aetrix Electronics and suitable for DVB-C set-top box manufacturing, SARFT-compliant consumer electronics, and dual-tuner DVR platforms requiring stable component supply and long-term lifecycle support.
Supply support for TDA18252HN/C1,557 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 applications.
The TDA18252HN/C1,557 belongs to NXP's silicon tuner product line, engineered specifically to replace legacy can-based tuners in cost-sensitive digital cable STB designs while meeting regional regulatory mandates like SARFT and enabling rapid integration with QAM demodulators.
FAQ
What frequency bands does the TDA18252HN/C1,557 support for digital cable reception?
The TDA18252HN/C1,557 supports 41–1002 MHz, covering full VHF/UHF digital cable spectrum including extended upper band required for China's GB/T 17788 and India's DVB-C deployments. It handles 6/7/8 MHz channel bandwidths with corresponding 4/4.5/5 MHz low-IF outputs, and is certified for SCTE-40, J-QAM, and NORDIG standards.
Does the TDA18252HN/C1,557 include analog loop-through capability, and how is it implemented?
Yes, the TDA18252HN/C1,557 integrates on-die analog loop-through functionality with dedicated RFIN and LT pins. When enabled via I²C register, it passes unprocessed RF signals to downstream analog TVs or legacy equipment without external amplifiers or switches - a mandatory feature for SARFT compliance in China and analogous regulations in India.
What is the power supply requirement for the TDA18252HN/C1,557, and how does it impact system design?
The TDA18252HN/C1,557 operates from a single 3.3 V supply with typical power dissipation below 800 mW. This eliminates need for separate 5 V or 1.8 V rails, reduces DC-DC converter count, and simplifies thermal management in space-constrained STB enclosures - directly lowering bill-of-materials and board area versus multi-rail tuner solutions.
How does the TDA18252HN/C1,557 interface with the TDA10024HN QAM demodulator?
The TDA18252HN/C1,557 interfaces with the TDA10024HN via three paths: (1) differential IFOUT_P/IFOUT_N delivering 4–5 MHz low-IF signal, (2) VIF_AGC analog voltage controlling demodulator gain, and (3) I²C bus for bidirectional configuration and telemetry. This co-designed pairing eliminates external filters and AGC amplifiers in reference designs like OM3853C/C1.
Is the TDA18252HN/C1,557 pin-compatible with traditional can-style tuners used in Chinese STB platforms?
Yes, the TDA18252HN/C1,557 is pin-to-pin compatible with conventional can tuners per the OM3865C/C1 reference design. Its HVQFN32 footprint and signal mapping (RFIN, LT, IFOUT, XTAL, etc.) allow direct replacement in existing layouts without PCB redesign - accelerating migration from legacy modules to silicon tuners in high-volume Chinese STB production.
TDA18252HN/C1,557 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Obsolete
- Function:
- Tuner
- Applications:
- Consumer Video
- Standards:
- -
- Control Interface:
- I2C
- Voltage - Supply:
- 3.3V ~ 3.6V
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 48-HVQFN (7x7)
TDA18252HN/C1,557 FAQ
1.How can I place an order for TDA18252HN/C1,557 through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA18252HN/C1,557 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TDA18252HN/C1,557 reliable?
The price and inventory of TDA18252HN/C1,557 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA18252HN/C1,557 is usually 5 days.
3.What payment methods are accepted for TDA18252HN/C1,557?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA18252HN/C1,557 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA18252HN/C1,557?
TDA18252HN/C1,557 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA18252HN/C1,557 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TDA18252HN/C1,557?
For technical support, including TDA18252HN/C1,557 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA18252HN/C1,557 requirements.
6.How does Aetrix verify that TDA18252HN/C1,557 is sourced from the original manufacturer or authorized distributors?
All TDA18252HN/C1,557 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TDA18252HN/C1,557 meets industry standards.
7.What is the process for return or replacement of TDA18252HN/C1,557?
All TDA18252HN/C1,557 units undergo pre-shipment inspection (PSI). If there is an issue with TDA18252HN/C1,557, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TDA18252HN/C1,557 part is unused and in its original packaging.
Return procedure for TDA18252HN/C1,557:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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