TMC2242AR2C1 - 40MHz Half-Band Digital Filter | onsemi
料号： TMC2242AR2C1 ✓ 量产中TMC2242AR2C1 概述
A digital half-band filter is a specialized finite impulse response filter whose frequency response includes a broad passband, a narrow transition region, and a stopband centered near one-half of the input sampling rate. By attenuating the center of the digital spectrum, a half-band filter reduces alias or image components with a relatively low computational and implementation burden. TMC2242AR2C1 places that filtering function in a dedicated integrated circuit, simplifying designs that previously required several separate filter stages.
The key verified characteristics of this device are its 40 MHz operating class, half-band filter order, digital interpolation and decimation capability, and 12B/16B data resolution. These characteristics position it for professional and broadcast video systems where sampled data must be filtered before or after rate conversion. Distributor records also associate the part with onsemi, MaxLinear, and historical Fairchild Semiconductor and Exar cataloging, reflecting the company's ownership and product-line history.
Because the TMC2242AR2C1 uses a 44-pin PLCC package rather than a modern leadless package, it is primarily relevant to legacy video infrastructure, retrofit programs, test equipment, and systems already designed around this footprint. Legacy PLCC devices also require attention to assembly method, thermal cycling, and availability before committing to a new production design.
The critical design consideration is to preserve the device's required clock relationship, control levels, and supported data format. A half-band filter only produces the intended spectral benefit when input and output clocks are configured correctly and data timing meets the manufacturer's requirements. Designers should also verify whether the filter is configured for interpolation, decimation, or both through its control and clock connections.
This page consolidates the verified distributor identity, package information, filter class, and sourcing records for the TMC2242AR2C1, and adds application-oriented guidance that is not normally presented in a distributor catalog entry. Because the verified data does not publish a complete pin map, detailed electrical limits, or confirmed lifecycle notice, those fields are explicitly marked rather than inferred.
直接替换替代料： TMC2242AR2C1 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
该产品暂无直接替换替代料。
请求替代料TMC2242AR2C1 最大额定值与电气特性
| Product Type | Digital half-band interpolation/decimation filter |
| Filter Order | Half-band order |
| Maximum Stated Frequency | 40 MHz |
| Signal Processing Function | Digital interpolation and decimation |
| Data Resolution | 12B/16B |
| Package Type | 44-PLCC |
| Package Dimensions | 16.59 mm x 16.59 mm |
| 安装类型 | Surface Mount |
| Manufacturer | onsemi |
| Historical Brand Association | Fairchild Semiconductor / Exar Corporation |
| Distributor Category | Video ICs / Interpolating-Decimating Filter |
TMC2242AR2C1 16.59 mm x 16.59 mm 引脚配置指南
TMC2242AR2C1（16.59 mm x 16.59 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： TMC2242AR2C1.
请参阅 数据手册 以查看完整引脚配置。
典型应用
TMC2242AR2C1 适用于 6 应用s: Digital Video Interpolation, Video Rate-Conversion Decimation, Broadcast Video Processing Chain, Professional Video Test Equipment, Legacy Video Infrastructure Retrofit, Digital Video Clock-Rate Conversion.
Digital Video Interpolation
The TMC2242AR2C1 fits a video interpolation stage that must filter spectral energy around one-half of the sampling rate before a digital rate increase. Its verified 40 MHz half-band filter class and dedicated interpolation function are purpose-built for this role, while the 12B/16B data handling supports legacy high-resolution video paths. Designers should configure the device's supported operating mode and clock ratio exactly as documented rather than assuming generic FIR behavior. The main benefit is that the dedicated filter reduces the need for several external processing stages. Before laying out a replacement board, verify the complete 44-PLCC pin map, logic thresholds, power rails, setup times, hold times, and the required relationship between input and output clocks.
推荐
Video Rate-Conversion Decimation
The TMC2242AR2C1 is applicable to the decimation side of a digital video rate converter, where the half-band response suppresses unwanted frequency content between the retained video band and the alias-prone region. The verified 40 MHz operating class and 12B/16B handling make it relevant to legacy high-rate digital video pipelines. Compared with an FPGA-implemented FIR, the dedicated filter provides a compact fixed-function implementation with deterministic behavior. Engineers must still confirm the supported decimation ratio, output clock generation, latency, and pipeline timing in the manufacturer datasheet. PCB design should preserve the PLCC footprint and provide suitable grounding and decoupling around the power pins identified in that document.
推荐
Broadcast Video Processing Chain
The TMC2242AR2C1 can serve a legacy broadcast video processing chain where sampled video data requires fixed half-band filtering at a 40 MHz class. Its dedicated interpolation and decimation capability is directly applicable between upstream converters and downstream processing blocks. Using a dedicated half-band filter can simplify signal-flow documentation and keep the filtering function independent from general-purpose video control logic. The 12B/16B data path must be matched exactly to the surrounding equipment, and synchronization latency must be included in the system timing budget. Because the PLCC package is a legacy assembly technology, repairs and production extensions should include a soldering-process capability check and a documented inspection method.
推荐
Professional Video Test Equipment
The TMC2242AR2C1 is appropriate for a professional video test instrument or legacy signal-processing fixture requiring a reproducible half-band filtering stage. The verified 40 MHz frequency class, 12B/16B handling, and interpolation/decimation function support fixed-format test vectors and rate-conversion experiments. Its dedicated implementation also gives repeatable filter behavior that can be compared against a golden system. The practical trade-off is package-related: the 44-PLCC format is less convenient than a modern leadless package and may complicate automated assembly or small instrument designs. Engineers should confirm the exact supported clock modes and latency, and should preserve the verified 16.59 mm by 16.59 mm package dimensions in any replacement footprint.
推荐
Legacy Video Infrastructure Retrofit
The TMC2242AR2C1 is especially relevant to retrofit and repair programs that must reproduce the behavior of an existing 44-PLCC video-filter board. Matching the existing package, clock architecture, and 12B/16B data convention avoids redesign of the surrounding analog and digital video sections. Its dedicated half-band interpolation and decimation functionality is useful when restoring a legacy raster or broadcast-processing path whose original filter IC is difficult to source. Before ordering, request a traceable quotation and confirm that the supplied unit matches the current manufacturer lineage. Production documentation should also record the PLCC soldering profile, handling precautions, and the device's date code, since these details affect long-term repair consistency.
推荐
Digital Video Clock-Rate Conversion
The TMC2242AR2C1 supports a clock-rate-conversion block that needs dedicated spectral filtering in addition to clock generation or selection. The half-band response targets the spectral region most commonly associated with aliasing during decimation and image energy during interpolation. Its verified 40 MHz frequency class makes it a candidate for legacy 40 MHz-class video paths, while 12B/16B handling must be reconciled with the upstream converter and downstream processor. The device should be evaluated for deterministic latency because that delay propagates through the complete video path. Layout work should prioritize short clock traces, controlled data routing, and grounding consistent with the manufacturer's application guidance, while the absence of a modern BGA or QFN option should be considered for high-volume new platforms.
推荐
推荐产品汇总
工程参考数据： TMC2242AR2C1 ——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 |
|---|---|
| Manufacturer | onsemi |
| Package | 44-PLCC (16.59 mm x 16.59 mm) |
| Filter Type | Digital half-band filter |
| Processing Function | Interpolation and decimation |
| Stated Frequency Class | 40 MHz |
| Data Handling | 12B/16B |
| Pin Count | 44 pins |
| Distributor Category | Video ICs / Interpolating-Decimating Filter |
关键差异点
- Dedicated half-band filtering function （对比 TMC2601R2C)
- Verified legacy 44-PLCC footprint （对比 TMC2084-HT)
- Fixed-function interpolation and decimation （对比 FPGA-implemented half-band FIR)
设计说明
Do not treat every similarly named half-band filter as a drop-in substitute. The verified data confirms a 44-PLCC package for the TMC2242AR2C1, but it does not provide a complete pin table or equivalent candidates. Before replacement, compare all 44 pins, supported interpolation and decimation ratios, clock relationships, data widths, control levels, power pins, and timing. Confirm that the manufacturer lineage and device revision match the original equipment documentation.
Preserve the original 44-PLCC footprint and route clock inputs as short, continuous paths away from data and control signals. Follow the datasheet's recommended decoupling connections and return connections, and avoid introducing long stubs between the device and its external clock-generation circuitry. Legacy PLCC assemblies also warrant careful inspection for board flex during solder rework because package cracking can produce intermittent clock or data failures.
The filter's clock and data timing are the critical unknowns in the supplied data. Validate setup and hold time, output delay, and permissible loading directly from the manufacturer datasheet before defining a new board. In a retrofit, measure the incoming pixel or sample clock and the filter's output clock at the device pins rather than relying only on instrument output-panel labels. An incorrect clock relationship can defeat the half-band response even when all visible data labels appear correct.
合规信息
The supplied verified data does not contain a manufacturer compliance statement for the TMC2242AR2C1. RoHS, REACH, lead-free, halogen-free, and conflict-minerals status therefore remain unknown rather than being inferred from the package or manufacturer.
