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STMicroelectronics STV6412ADT
- Part No.:
- STV6412ADT
- Manufacturer:
- STMicroelectronics
- Category:
- Analog Switches - Special Purpose
- Package:
- 64-LQFP
- Datasheet:
-
STV6412ADT.pdf
- Description:
- IC AUDIO/VIDEO SWIT DUAL 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,148
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Product details
Overview
STV6412ADT from STMicroelectronics is an I²C-controlled audio/video switch matrix IC designed for digital set-top box applications. It integrates 4 CVBS inputs, 3 stereo audio inputs, 6 dB gain on all CVBS/Y/C outputs, 15 MHz video bandwidth, and supports dual-SCART routing with chroma trap filtering and RGB/FB tri-state output. It serves as the central A/V routing hub in full two-SCART STB designs.
For engineers reviewing the STV6412ADT datasheet, STV6412ADT pinout, STV6412ADT application, or STV6412ADT equivalent, key selection criteria include CVBS/Y/C/RGB signal path count, I²C address configurability (94h/95h or 96h/97h), standby interrupt capability, chroma trap enablement, and SCART-compatible slow/fast blanking I/O handling.
Technical Context
The STV6412A implements a fully configurable analog signal matrix with independent audio and video switching planes controlled via I²C. Its video section includes dedicated Y/C adder, RGB/FB tri-state output with adjustable +3 to +9 dB gain, and sync bottom clamping on all CVBS/Y/RGB inputs.
Audio routing supports stereo-to-mono conversion, 0/6/9 dB selectable gain on one input channel, soft-volume control across all outputs, and mute capability per output. The device features integrated 150 Ω video buffers, 50 dB minimum crosstalk, and programmable slow blanking I/O with three-level output (4:3, 16:9, low) for TV format detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Video Bandwidth | 15 MHz - supports full NTSC/PAL composite and S-video signals without high-frequency roll-off |
| CVBS/Y/C Output Gain | 6 dB - provides standard line-driver level for direct SCART connection without external amplification |
| RGB/FB Output Gain Range | +3 dB to +9 dB - enables fine-tuning of RGB signal amplitude to match display input sensitivity |
| I²C Address Options | 94h/95h or 96h/97h - allows dual-device coexistence on same bus via ADD pin logic level |
| Crosstalk (Video) | ≥50 dB - ensures minimal interference between active CVBS/Y/C channels during multi-source switching |
| Slow Blanking Output Levels | Three states: 0–1.5 V (low), 5–6.5 V (medium/16:9), 10–12 V (high/4:3) - directly drives SCART format signaling |
| Interrupt Output (IT_OUT) | Active-low open-drain - wakes microcontroller from standby on SLB input change; cleared by register read |
Pinout & Package
LQFP64L (14 × 14 × 1.4 mm) low-profile quad flat package with exposed thermal pad; 64-pin layout optimized for SCART interface routing and decoupling capacitor placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC, VDD, VCC12, VCCAO, VCCA, VCCB1–VCCB5 | Multi-rail power supplies | Dedicated voltage domains: digital core (5 V), audio drivers (12 V), video buffers (5 V or 12 V), slow blanking (12 V) |
| CVBSIN_TV / CVBSIN_VCR / CVBSIN_AUX | Composite video inputs | Three independent CVBS sources for TV, VCR, and auxiliary devices with bottom-clamp synchronization |
| Y/CVBSOUT_TV / Y/CVBSOUT_VCR | Composite/S-video outputs | Two primary CVBS/Y outputs with 6 dB gain and integrated 150 Ω termination for SCART compliance |
| R/COUT_TV / GOUT_TV / BOUT_TV | RGB outputs | Tri-state RGB output with adjustable gain (+3 to +9 dB); R/C pin supports chroma or red routing |
| SLB_TV / SLB_VCR / FBIN_ENC / FBOUT_TV | Blanking control I/O | Bi-directional slow blanking pins and fast blanking inputs/outputs for SCART format negotiation and sync suppression |
| SCL / SDA / ADD / IT_OUT | I²C interface & control | Standard I²C bus with address selection (ADD) and interrupt-driven wake-up (IT_OUT) for low-power operation |
Key Features
| Feature | Design Value |
|---|---|
| Integrated chroma trap filter | Selectable on one CVBS output to suppress color subcarrier interference in composite video paths |
| Y/C adder circuit | Combines separate Y and C signals into composite CVBS output without external components |
| Soft volume control | Gradual attenuation ramp prevents audible pop/click during audio source switching |
| Tri-state RGB/FB output | Enables shared RGB bus architecture in multi-device systems by electrically isolating inactive outputs |
| Sync bottom clamp | Stabilizes DC level on all CVBS/Y/RGB inputs using sync pulse timing-critical for consistent black level |
Applications
| Digital Set-Top Box (Dual SCART) | AV Receiver with Multi-Source Switching |
|---|---|
|
Use Scenario: Full two-SCART STB design routing CVBS, Y/C, RGB, and audio between TV, VCR, encoder, and RF modulator. IC Role / Device Role / Timing Role: Central A/V matrix managing signal selection, gain, muting, blanking, and I²C-coordinated state transitions. Use Value: Eliminates discrete switch arrays and op-amps; reduces BOM count by >12 components while enabling feature-rich remote-controlled routing. |
Use Scenario: Consumer AV receiver supporting simultaneous connection of DVD player, game console, and satellite STB via SCART. IC Role / Device Role / Timing Role: Analog signal router with synchronized audio/video path selection and format-aware blanking generation. Use Value: Enables seamless source switching with zero visible sync disruption and automatic aspect ratio signaling to displays. |
| Professional Video Distribution Hub | Legacy Broadcast Equipment Interface |
|
Use Scenario: Rack-mounted video distribution system routing composite, S-video, and RGB feeds to multiple monitors and recorders. IC Role / Device Role / Timing Role: High-isolation analog matrix with precise gain matching and crosstalk suppression across all outputs. Use Value: Maintains signal integrity across 6+ output paths; 50 dB crosstalk and ±0.5 dB gain matching ensure uniform image quality. |
Use Scenario: Interface module converting legacy broadcast equipment outputs (CVBS/Y/C/RGB) to modern monitoring or recording systems. IC Role / Device Role / Timing Role: Format translator and level shifter providing SCART-compatible blanking, clamping, and impedance matching. Use Value: Preserves analog timing fidelity (DPHI ≤5°, DG ≤5%) and sync stability required for broadcast-grade signal handoff. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar audio/video matrix switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STV6419 | Higher integration: adds HDMI receiver support and embedded microcontroller; larger QFP100 package | Targets next-gen STBs requiring hybrid analog/digital routing; not pin-compatible | Choose STV6419 only if HDMI ingestion and firmware-based routing logic are required; STV6412ADT remains optimal for pure analog SCART systems. |
| MAX4389 | Single-function 4×3 CVBS switch; no audio, RGB, blanking, or I²C control-requires external MCU and level-shifting | Used in cost-sensitive single-path video switches where full A/V matrix functionality is unnecessary | Select MAX4389 only for minimal CVBS-only routing; STV6412ADT provides complete A/V/blanking integration in one die. |
Compared with STV6412ADT, STV6419 adds digital interface capability at the cost of increased complexity and footprint, while MAX4389 lacks audio, RGB, and control integration-making STV6412ADT the sole solution for full dual-SCART analog routing with intelligent blanking and I²C management.
Availability
STV6412ADT is available at Aetrix Electronics and suitable for digital set-top box designs, professional AV distribution systems, and legacy broadcast interface modules requiring stable component supply and long-lifecycle support.
Supply support for STV6412ADT 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, mixed-signal, and power management ICs for consumer, industrial, and automotive markets.
The STV64xx series was developed specifically for high-fidelity analog A/V signal routing in digital television equipment, emphasizing SCART compliance, low crosstalk, and intelligent blanking control.
FAQ
What is the function of the FILTER pin on STV6412ADT?
The FILTER pin connects an external capacitor to enable the integrated chroma trap filter on the Y/CVBSOUT_TV output. When activated via I²C register control, this filter attenuates the 4.43 MHz PAL/NTSC color subcarrier to reduce cross-color artifacts in composite video signals-critical for clean monochrome display or legacy monitor compatibility.
Does STV6412ADT support RGB and Y/C signal mixing?
Yes-STV6412ADT includes a dedicated Y/C adder circuit that combines separate luminance (Y) and chrominance (C) inputs into a single composite CVBS output. It does not mix RGB with Y/C; RGB paths remain independent, but the Y/C adder enables flexible S-video-to-composite conversion without external components.
How does the slow blanking (SLB) functionality operate in STV6412ADT?
SLB pins (SLB_TV, SLB_VCR) operate in bidirectional mode: as inputs, they detect TV/VCR format signals (4:3 or 16:9); as outputs, they drive three-level voltages (low/medium/high) to communicate aspect ratio to connected devices. Internal logic interprets SLB transitions to trigger IT_OUT interrupt, enabling microcontroller wake-up from standby.
Can STV6412ADT be used in new designs despite its obsolete status?
Yes-STV6412ADT remains actively supported by Aetrix Electronics with verified inventory, full traceability, and lifecycle coordination. Its obsolescence designation reflects ST's product roadmap shift toward digital interfaces, not functional discontinuation; it is fully qualified for new STB and broadcast interface designs requiring proven analog A/V routing.
STV6412ADT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 64-LQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Audio, Video
- Multiplexer/Demultiplexer Circuit:
- -
- Switch Circuit:
- -
- Number of Channels:
- -
- On-State Resistance (Max):
- -
- Voltage - Supply, Single (V+):
- 4.75V ~ 5.25V
- Voltage - Supply, Dual (V±):
- ±4.75V ~ 5.25V, ±11.2V ~ 12.8V
- -3db Bandwidth:
- 15MHz
- Features:
- CVBS, I2C, SCART
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-LQFP (14x14)
STV6412ADT FAQ
1.How can I place an order for STV6412ADT through Aetrix?
Please submit a Request for Quotation (RFQ) for STV6412ADT 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 STV6412ADT reliable?
The price and inventory of STV6412ADT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STV6412ADT is usually 5 days.
3.What payment methods are accepted for STV6412ADT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STV6412ADT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STV6412ADT?
STV6412ADT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STV6412ADT 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 STV6412ADT?
For technical support, including STV6412ADT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STV6412ADT requirements.
6.How does Aetrix verify that STV6412ADT is sourced from the original manufacturer or authorized distributors?
All STV6412ADT 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 STV6412ADT meets industry standards.
7.What is the process for return or replacement of STV6412ADT?
All STV6412ADT units undergo pre-shipment inspection (PSI). If there is an issue with STV6412ADT, 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 STV6412ADT part is unused and in its original packaging.
Return procedure for STV6412ADT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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