TMC22071AKHC Genlocking Video Digitizer | onsemi
料号： TMC22071AKHC ✓ 量产中TMC22071AKHC 概述
A video digitizer is a signal-processing IC that converts analog composite-video information into digital timing and pixel-related data for subsequent processing. Within the video-processing hierarchy, it combines analog input conditioning, synchronization extraction, timing measurement, phase-locked-loop control, and a digital direct digital synthesizer. The TMC22071AKHC therefore sits between composite-video sources and downstream digital video or synchronization systems rather than functioning as a general-purpose video encoder.
The verified feature set includes a fully integrated three-channel acquisition multiplexer and a two-stage video clamp. These functions allow multiple analog video inputs to share the acquisition path while stabilizing the signal before it reaches the timing-processing circuitry. Automatic gain adjustment compensates for input-level variation, and synchronization detection and separation supports reliable identification of video timing information. The operating range is specified from 0°C to 70°C.
Internal timing functions include horizontal synchronization generation, pixel and subpixel HSYNC-to-video timing adjustment, a horizontal phase-locked loop, and a direct digital synthesizer. The verified pin information also identifies PLL-filter, phase-frequency-detector input, bypass-capacitor, reference-voltage, compensation, clock-input, and clock-output connections. These blocks indicate that the device performs both synchronization recovery and programmable timing generation rather than simply digitizing luminance and chrominance voltage levels.
Typical uses include NTSC or PAL video timing generation, multi-source video selection, genlocking equipment, broadcast and professional video systems, laboratory video synchronization setups, and embedded systems that need repeatable timing derived from an external composite-video source. A three-channel multiplexer is particularly useful where several sources must be acquired through a shared analog front end.
Designers should pay particular attention to analog grounding, bypass placement, reference and compensation networks, PLL filtering, and external clock implementation. Because this is a high-pin-count MQFP device, PCB layout should minimize analog and digital return paths while preserving the application values recommended in the manufacturer datasheet. The 0°C to 70°C specification also makes this part best suited to commercial-temperature equipment rather than extended industrial or automotive environments.
This page combines verified manufacturer and distributor data with practical design context, explicit data gaps, and a same-package alternative review. It is designed to support datasheet lookup, procurement, initial circuit planning, and drop-in replacement assessment without inventing electrical ratings, pin functions, or cross-reference data that the supplied sources do not establish.
直接替换替代料： TMC22071AKHC ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
TMC22071AHCP
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TMC22071AKHC 规格参数
| Product Type | Genlocking video digitizer |
| Manufacturer | onsemi |
| Supply Voltage Range | 4.75 V to 5.25 V |
| Supported Video Standards | NTSC, PAL |
| Video Input Multiplexer Channels | 3 channels |
| Video Clamp | Two-stage |
| Automatic Gain Adjustment | Supported |
| Synchronization Functions | Sync detection and separation |
| Timing Adjustment | Pixel and subpixel adjustment of HSYNC-to-video timing |
| Genlock Support | Genlock to NTSC or PAL inputs |
| Internal Timing Architecture | Horizontal phase-locked loop and direct digital synthesizer |
| Performance Temperature Range | 0°C to 70°C |
| 封装 | 100-MQFP (20 mm × 14 mm) |
| 安装类型 | Surface Mount |
| Signal Input Type | Analog composite video |
| Interface Category | Video processing IC |
| Documented Interface Blocks | PLL filter, PFD input, bypass capacitor, VREF, COMP, CLK IN, and CLK OUT |
TMC22071AKHC 100-mqfp (20 mm × 14 mm) 引脚配置指南
TMC22071AKHC（100-mqfp (20 mm × 14 mm) 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： TMC22071AKHC.
请参阅 数据手册 以查看完整引脚配置。
典型应用
TMC22071AKHC 适用于 6 应用s: Multi-Source Video Acquisition, NTSC and PAL Genlocking, Professional Video Timing Systems, Video Test and Measurement Equipment, Analog Video Switching and Conditioning, Embedded Composite-Video Timing Controller.
Multi-Source Video Acquisition
The TMC22071AKHC fits multi-source analog-video acquisition because it integrates a three-channel acquisition multiplexer with a two-stage video clamp and automatic gain adjustment. According to the manufacturer datasheet, these blocks allow several composite-video inputs to share the acquisition path while the clamp and gain functions condition changing signal levels. The selected source can then feed the synchronization detector and separator, reducing the need for separate input-switching circuitry. Designers should preserve the recommended grounding, bypass, and reference networks around the analog interface. A measured trade-off is the 100-MQFP footprint, which is substantially larger and more complex to route than a small mixed-signal converter, but it consolidates multiplexing, timing recovery, and genlocking functions in one device.
推荐
NTSC and PAL Genlocking
The TMC22071AKHC is appropriate for equipment that must synchronize local timing to an external NTSC or PAL composite-video reference. According to the manufacturer datasheet, the device includes sync detection and separation, a horizontal phase-locked loop, a direct digital synthesizer, and genlock capability for both standards. These blocks allow HSYNC timing to be recovered or regenerated with pixel and subpixel adjustment relative to video. The main implementation requirement is a stable 4.75 V-to-5.25 V supply and careful analog layout around the PLL filter, PFD input, bypass capacitor, reference, compensation, and clock connections.
推荐
Professional Video Timing Systems
The TMC22071AKHC can support professional video timing systems that require repeatable synchronization derived from an analog composite-video source. Its documented sync separation, horizontal phase-locked loop, direct digital synthesizer, and adjustable HSYNC-to-video relationship provide the functional blocks needed for stable timing generation. According to the manufacturer datasheet, the device is guaranteed from 0°C to 70°C, which makes it appropriate for controlled commercial equipment but not automatically suitable for extended industrial environments. The 100-MQFP package demands disciplined routing and grounding, particularly where analog timing paths and digital control interfaces share the board.
推荐
Video Test and Measurement Equipment
The TMC22071AKHC fits laboratory video test equipment that compares or aligns an incoming composite-video signal with a synthesized reference. Its three-channel multiplexer permits selection among multiple sources, while automatic gain adjustment and the two-stage clamp help establish a stable signal level before synchronization processing. According to the manufacturer datasheet, pixel and subpixel HSYNC-to-video adjustment supports more precise timing alignment than coarse delay selection. External clock and PLL-filter connections are critical to repeatable results, so component tolerances, reference stability, and layout should be controlled in accordance with the manufacturer recommendations.
推荐
Analog Video Switching and Conditioning
The TMC22071AKHC can simplify boards that need more than passive analog video switching. Its integrated three-channel multiplexer performs source selection, the two-stage clamp provides video-level conditioning, and automatic gain adjustment reduces sensitivity to source-level variation. According to the manufacturer datasheet, the conditioned signal proceeds into synchronization detection and separation, enabling timing-aware behavior rather than simple signal routing. The design trade-off is functional consolidation against a 100-pin MQFP implementation, which requires more PCB area and careful treatment of analog, digital, PLL, clock, and ground connections.
推荐
Embedded Composite-Video Timing Controller
The TMC22071AKHC is useful in embedded equipment that must derive or align digital timing from an external NTSC or PAL composite-video signal. The direct digital synthesizer, horizontal phase-locked loop, sync separator, and pixel/subpixel adjustment support controllable timing relationships, while the internal multiplexer simplifies systems with several available sources. According to the manufacturer datasheet, external PLL-filter, PFD-input, bypass-capacitor, clock, reference, and compensation paths are integral to the intended circuit. Its specified 0°C-to-70°C range and 4.75 V-to-5.25 V supply make enclosure temperature and power-budget planning important.
推荐
推荐产品汇总
工程参考数据： TMC22071AKHC ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | TMC22071AHCP |
|---|---|---|
| Package | 100-MQFP (20x14) | 100-MQFP (20x14) |
| Brand | onsemi | onsemi |
| Product Type | Genlocking video digitizer | Genlocking video digitizer |
关键差异点
- Integrated three-channel analog-video acquisition （对比 TMC22071AHCP)
- Direct NTSC and PAL genlocking support （对比 TMC22071AHCP)
- Fine HSYNC alignment （对比 TMC22071AHCP)
- Consolidated video-timing architecture （对比 TMC22071AHCP)
设计说明
Follow the manufacturer datasheet layout for the three analog video inputs, two-stage clamp, VREF, COMP, RT, RB, PLL-filter network, PFD input, CBYP, and clock connections. Keep analog routing compact, maintain a continuous ground reference under the MQFP where recommended by the datasheet, and avoid routing digital signals beneath sensitive analog nodes. The high pin count does not replace good partitioning: separating the analog acquisition path from PLL and digital timing paths can reduce coupling between video levels and synchronization circuitry.
Operate the TMC22071AKHC from a supply constrained to 4.75 V to 5.25 V and verify startup, tolerance, ripple, and load-transient behavior in the final system. Place the datasheet-recommended bypass capacitors close to their associated supply and reference pins, with short ground returns. Although the supplied data does not specify current consumption or permitted operating dissipation, those values must be checked in the manufacturer datasheet before finalizing a 5 V power budget or estimating thermal margins.
Do not treat the TMC22071AKHC as a conventional standalone ADC. Its documented role includes analog multiplexing, clamping, gain adjustment, synchronization separation, phase locking, and timing synthesis, so the external clock, PLL-filter, reference, compensation, and bypass networks determine usable performance. Also confirm that the NTSC or PAL timing expectations of the target source match the design. The verified 0°C-to-70°C range does not support an extended industrial temperature claim without additional qualification evidence.
合规信息
The supplied verified web data does not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These fields remain unknown rather than being inferred from the distributor listings.
