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STMicroelectronics STV6412AD
- Part No.:
- STV6412AD
- Manufacturer:
- STMicroelectronics
- Category:
- Analog Switches - Special Purpose
- Package:
- 64-LQFP
- Datasheet:
-
STV6412AD.pdf
- Description:
- IC AUDIO/VIDEO SWIT DUAL 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,092
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Product details
Overview
STV6412AD from STMicroelectronics is a highly integrated I²C-controlled audio/video switch matrix IC designed for digital set-top box applications. It provides full two-SCART routing with 4 CVBS inputs, 3 stereo audio inputs, 6 dB gain on all video outputs, integrated 150 Ω buffers, and chroma trap filter selection on one CVBS output - enabling complete signal switching in legacy TV interface systems.
For engineers reviewing the STV6412AD datasheet, STV6412AD pinout, STV6412AD application, or STV6412AD equivalent, this device supports precise analog signal routing with I²C address selection (94h/95h or 96h/97h), standby interrupt signaling, RGB/FB tri-state output with adjustable +3 to +9 dB gain, and synchronized slow/fast blanking I/O for SCART compliance.
Technical Context
The STV6412AD integrates independent audio and video signal paths with dedicated I²C register mapping for per-channel mute, gain, and routing control. Its architecture includes three distinct video sections - CVBS/Y/C, RGB/FB, and chroma processing - each with matched gain stages (±0.5 dB matching), bottom sync clamping, and 15 MHz bandwidth for composite and S-video signals.
Audio routing supports stereo-to-mono conversion, 0/6/9 dB selectable gain on one input channel, and soft-stepped volume control across all outputs. The device implements dual blanking I/O (SLB/FB) with programmable output levels (4/3 vs. 16/9) and an interrupt output (IT_OUT) that asserts low on slow blanking edge detection - enabling microcontroller wake-up from standby mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Video Bandwidth | 15 MHz (-3 dB, Y/CVBS path) - supports full NTSC/PAL composite and S-video baseband signals without high-frequency roll-off. |
| Crosstalk Isolation | ≥50 dB (output-to-output, 4.43 MHz) - prevents color bleeding between active video outputs in multi-SCART configurations. |
| Output Gain Range | +3 to +9 dB (RGB/FB output, adjustable in 3 dB steps) - enables level matching to downstream RF modulators or SCART inputs with varying sensitivity. |
| Audio Volume Control | -62 dB to 0 dB in 2 dB steps with soft transition - eliminates audible zipper noise during real-time channel switching. |
| I²C Address Options | 0x94/0x95 or 0x96/0x97 (via ADD pin) - allows dual-device I²C bus coexistence in systems requiring redundant or split A/V routing. |
| Supply Voltages | VCC = 5 V, VCCAO = 12 V, VCC12 = 12 V - separates audio driver, digital logic, and blanking circuitry for noise isolation and thermal management. |
| Mute Suppression | -55 dB (video), -90 dB (audio) - ensures clean black screen and silent output during source transitions. |
Pinout & Package
LQFP64L (14 × 14 × 1.4 mm) package with exposed thermal pad; 64-pin quad flat layout optimized for analog signal integrity and SCART interface routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–4, 37–48, 63 | Video supply rails (VCC, VCCB1–VCCB5, VCC12) | Dedicated power domains isolate buffer stages, reduce crosstalk, and support 12 V blanking drivers independently of 5 V logic. |
| 27–33, 62 | Audio outputs (ROUT_TV, LOUT_TV, ROUT_VCR, etc.) | Low-impedance buffered outputs drive 10 kΩ SCART loads directly; internal 600 Ω source impedance matches standard audio line levels. |
| 42, 40, 38, 44, 48 | RGB/Y/CVBS video outputs (R/COUT_TV, GOUT_TV, BOUT_TV, Y/CVBSOUT_TV, etc.) | 150 Ω integrated output buffers eliminate external termination and maintain impedance continuity to SCART connectors. |
| 58 | IT_OUT | Open-drain interrupt output pulls low on SLB edge detection - used to wake microcontrollers from standby without polling. |
| 59–61 | SLB_TV, SLB_VCR, FBIN_ENC | Bi-directional slow/fast blanking I/O with programmable output voltage levels (4/3 vs. 16/9) - satisfies SCART specification timing and level requirements. |
| 54 | ADD | Hardware I²C address select: grounded = 0x94/0x95, pulled high = 0x96/0x97 - enables dual-device addressing on shared bus. |
Key Features
| Feature | Design Value |
|---|---|
| Chroma trap filter select | Configurable on one CVBS output to suppress chroma interference in monochrome displays or legacy monitors. |
| Y/C adder | Integrated analog summer combines Y and C signals into composite CVBS - eliminates external op-amp circuitry in encoder paths. |
| Tri-state RGB/FB output | Enables shared RGB bus usage across multiple sources (e.g., TV + VCR) without signal contention or external switches. |
| Sync bottom clamp | Active DC restoration on all CVBS/Y/RGB inputs maintains black level stability across varying source sync amplitudes. |
| Stereo-to-mono conversion | Hardware summing of left/right channels to mono output (AOUT_RF) - simplifies RF modulator interface with single audio input. |
Applications
| Digital Set-Top Box (Dual SCART) | Legacy TV Interface Hub |
|---|---|
|
Use Scenario: Routing AV signals between TV, VCR, and auxiliary devices in European SCART-based STB designs. IC Role / Device Role / Timing Role: Central A/V matrix managing CVBS, Y/C, RGB, audio, and blanking signals under I²C host control. Use Value: Eliminates 12+ discrete switches and op-amps; reduces BOM count by >40% while maintaining PAL/NTSC signal fidelity. |
Use Scenario: Converting modern HDMI or component sources to legacy SCART-equipped TVs via adapter boxes. IC Role / Device Role / Timing Role: Signal conditioner and router providing sync clamping, gain matching, and blanking coordination. Use Value: Preserves luminance/chroma timing alignment (CToYdel ≤20 ns) and differential gain/phase (<5%) for broadcast-grade output. |
| RF Modulator Front-End | Professional Video Test Bench |
|
Use Scenario: Feeding combined audio (L+R) and CVBS signals to RF modulators for channel 3/4 transmission. IC Role / Device Role / Timing Role: Final-stage A/V combiner with 6 dB output gain and mute-synchronized RF output (AOUT_RF/VOUT_RF). Use Value: Integrated 6 dB gain compensates for RF modulator insertion loss; mute suppression prevents burst noise on channel change. |
Use Scenario: Lab equipment for evaluating source compatibility, crosstalk, and timing skew across multiple video standards. IC Role / Device Role / Timing Role: Programmable reference switch enabling repeatable, register-controlled signal path configuration. Use Value: I²C register access allows automated test sequences; 50 dB crosstalk and ±0.5 dB gain matching support metrology-grade measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar audio/video matrix applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STV6419D | Successor with enhanced ESD rating (±6 kV), extended temperature range (−40°C to +85°C), and updated I²C timing compliance. | Supports industrial and extended-life consumer deployments where STV6412AD's 0–70°C range is insufficient. | Select when long-term availability and wider environmental tolerance are required; pinout and register map are backward compatible. |
| MAX4389E | 3×3 CVBS-only switch with no audio, RGB, or blanking I/O; 200 MHz bandwidth but lacks integrated clamping/gain. | Only suitable for simplified CVBS routing without SCART-level feature set (e.g., basic monitor switching). | Choose only if RGB, audio, and blanking functions are handled externally; not a functional replacement for STV6412AD's full feature set. |
Compared with STV6412AD, STV6419D offers lifecycle assurance and robustness upgrades while preserving design reuse, whereas MAX4389E serves narrow CVBS-only use cases at the cost of losing all SCART-specific functionality and integrated signal conditioning.
Availability
STV6412AD is available at Aetrix Electronics and suitable for digital set-top box manufacturing, legacy TV interface adaptation, and RF modulator front-end designs requiring stable component supply and long-term sourcing continuity.
Supply support for STV6412AD 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 headquartered in Geneva, specializing in analog, power, and microcontroller solutions for industrial, automotive, and consumer markets.
The STV64xx series was developed specifically for European SCART-based consumer AV equipment, delivering integrated signal routing, conditioning, and timing control in a single LQFP package to replace complex discrete implementations.
FAQ
What is the function of the FILTER pin (Pin 34)?
The FILTER pin connects an external capacitor to configure the chroma trap filter on the selected CVBS output. When enabled, it attenuates 4.43 MHz chroma components to prevent interference in monochrome displays or legacy monitors. The filter is digitally controlled via I²C register bit, and its cutoff is set by the capacitor value per datasheet Figure 10.
Can STV6412AD operate with 3.3 V I²C logic levels?
Yes - the SCL and SDA pins tolerate 3.3 V logic inputs (VIH min = 2.3 V, VIL max = 1.5 V) and are compatible with both 3.3 V and 5 V I²C buses. The VDD pin must be supplied with 5 V, but the bus interface operates correctly with mixed-voltage systems without level shifters.
How does the IT_OUT interrupt behave in standby mode?
In standby mode, IT_OUT asserts low when any slow blanking input (SLB_TV or SLB_VCR) changes state - serving as a wake-up signal for the host microcontroller. The interrupt remains active until the corresponding I²C status register is read, ensuring edge detection is not missed during low-power operation.
Is the RGB/FB output truly tri-state, and how is it controlled?
Yes - the RGB/FB output (Pin 42) enters high-impedance state when bit 7 of I²C register 0x0F is set to '1'. This allows multiple STV6412AD devices or other RGB sources to share a common bus without contention, controlled entirely via I²C without external logic.
STV6412AD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 64-LQFP
- Packaging:
- Tray
- 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)
STV6412AD FAQ
1.How can I place an order for STV6412AD through Aetrix?
Please submit a Request for Quotation (RFQ) for STV6412AD 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 STV6412AD reliable?
The price and inventory of STV6412AD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STV6412AD is usually 5 days.
3.What payment methods are accepted for STV6412AD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STV6412AD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STV6412AD?
STV6412AD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STV6412AD 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 STV6412AD?
For technical support, including STV6412AD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STV6412AD requirements.
6.How does Aetrix verify that STV6412AD is sourced from the original manufacturer or authorized distributors?
All STV6412AD 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 STV6412AD meets industry standards.
7.What is the process for return or replacement of STV6412AD?
All STV6412AD units undergo pre-shipment inspection (PSI). If there is an issue with STV6412AD, 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 STV6412AD part is unused and in its original packaging.
Return procedure for STV6412AD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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