TMC2242AKTCT - 30MHz Half-Band Digital Filter | onsemi
MPN： TMC2242AKTCT ✓ 啟用中TMC2242AKTCT 概覽
A half-band filter is a specialized FIR digital filter whose frequency response has a narrow transition band centered near the cutoff frequency. Only every other input coefficient is nonzero in the ideal half-band structure, reducing the number of active multipliers relative to a conventional FIR filter. In signal-processing hierarchies, the TMC2242AKTCT belongs to the active-filter and digital-filter categories, then to the interface-IC and video-IC application segment.
The TMC2242AKTCT provides one filter, a nominal 30 MHz cutoff or center frequency, and digital operation identified as 12-bit or 16-bit. Its specified 4.75 V to 5.25 V supply range is suitable for conventional 5 V digital signal-processing equipment. The 44-MQFP surface-mount package provides 44 physical pins and a 10 mm by 10 mm footprint. Active-production status is reported by Rochester Electronics in the supplied distributor information.
The device combines interpolation and decimation in one digital filter family. When used for interpolation, it can increase the effective sample rate while suppressing imaging between original signal bands. When used for decimation, it can reduce the data rate while suppressing aliasing before the signal is downsampled. The half-band coefficient structure is particularly useful where computational efficiency, predictable filtering, and a compact implementation are more important than a user-programmable coefficient architecture.
Typical applications include digital video interfaces, multimedia processing chains, communications equipment, audio and video sample-rate conversion, clocked digital filtering, and embedded signal-processing systems. The component can be placed after an ADC or digital transmitter when decimation is required, or before a DAC or digital transmitter when interpolation is required. System timing, input word width, output word width, and clock polarity must be verified against the manufacturer datasheet before layout is finalized.
The primary design consideration is clock and data-interface validation. The 5 V operating range is narrow, so supply regulation, ground return paths, and exposed-pad connection must follow the manufacturer layout recommendations. Because the provided search results do not expose the complete pin table, clock timing, control-signal truth table, or thermal-resistance data, engineers should confirm those details in the Fairchild Semiconductor manufacturer datasheet before production release.
This product record consolidates verified distributor pricing, package information, lifecycle information, technical-fit guidance, and traceable source links. It also distinguishes what is confirmed from what still requires datasheet verification, providing a practical basis for schematic capture, PCB planning, sourcing, and prototype review without presenting unavailable electrical details as guaranteed specifications.
直接替換替代品，適用於 TMC2242AKTCT — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此產品無可直接替換的替代品。
申請替代品TMC2242AKTCT 最大額定值與電氣特性
| Filter Type | Digital half-band interpolating/decimating filter |
| Number of Filters | 1 |
| Filter Order | Half band |
| Cutoff or Center Frequency | 30 MHz |
| Digital Word Length | 12-bit or 16-bit |
| Supply Voltage Range | 4.75 V to 5.25 V |
| 封裝 | 44-MQFP (10 mm x 10 mm) |
| 安裝類型 | Surface mount |
| Manufacturer | Fairchild Semiconductor, now onsemi |
| Product Status | Active |
TMC2242AKTCT 44-mqfp (10 mm x 10 mm) 腳位配置指南
TMC2242AKTCT（44-mqfp (10 mm x 10 mm) 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： TMC2242AKTCT.
請參閱 資料表 以查看完整腳位配置。
典型應用
TMC2242AKTCT 適用於 6 應用s: Digital Video Sample-Rate Conversion, Audio Sample-Rate Interpolation, Communications Interface Filtering, Clocked Digital Signal Processing, ADC Output Decimation, Embedded Multimedia Processing.
Digital Video Sample-Rate Conversion
The TMC2242AKTCT fits digital video sample-rate-conversion stages that require a dedicated half-band filter around its specified 30 MHz cutoff or center frequency. It can be placed between a video source and a downstream transmitter or display interface to suppress spectral images during interpolation or control aliasing during decimation. The 12-bit or 16-bit digital operation and 4.75 V to 5.25 V supply suit a 5 V processing domain. Before committing the circuit, verify clock rate, data-bus timing, input and output word lengths, and the complete 44-pin signal map against the manufacturer datasheet.
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Audio Sample-Rate Interpolation
The TMC2242AKTCT can be used in an audio-rate conversion path where a half-band interpolation stage is needed between an existing digital stream and a higher-rate output. Its confirmed 30 MHz cutoff or center frequency is much higher than typical baseband audio bandwidth, allowing the device to participate in a higher-rate multimedia processing chain rather than a conventional low-frequency audio-only filter. The 5 V supply range supports integration with established digital logic. Verify the datasheet's actual audio-mode rate, supported clocking scheme, and filter response before signal-path sign-off.
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Communications Interface Filtering
The TMC2242AKTCT is applicable where a communications data path needs dedicated interpolation or decimation rather than a configurable general-purpose FIR filter. Its confirmed one-filter half-band architecture, nominal 30 MHz cutoff or center frequency, and 12-bit or 16-bit operation can support digital conditioning around high-rate converters or interface stages. The 44-MQFP surface-mount package accommodates dense digital layouts, but its 10 mm by 10 mm body is not a tiny alternative to a small QFN. Confirm maximum input and output rates, clock latency, and control compatibility in the manufacturer documentation.
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Clocked Digital Signal Processing
The TMC2242AKTCT suits clocked digital signal-processing systems requiring a fixed half-band response in a 5 V logic environment. Its confirmed 30 MHz cutoff or center frequency and 12-bit or 16-bit interface description make it appropriate for evaluation in multimedia pipelines where interpolation or decimation is part of the data architecture. Because the supplied results do not specify maximum clock frequency, setup time, or pipeline latency, those parameters must be obtained from the Fairchild Semiconductor datasheet before defining the surrounding clock tree and PCB timing budget.
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ADC Output Decimation
The TMC2242AKTCT can serve as a decimation stage after a high-speed ADC when the downstream processor requires a lower sample rate and reduced aliasing content. The supplied data identifies a 30 MHz cutoff or center frequency and 12-bit or 16-bit operation, making it a candidate for evaluating in high-speed digital acquisition paths. The device must be clocked consistently with the ADC and the receiving logic, and its supported word-length modes must be confirmed. Do not finalize synchronization or latency assumptions until the complete timing and pinout information is verified from the manufacturer datasheet.
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Embedded Multimedia Processing
The TMC2242AKTCT is applicable to embedded multimedia systems that combine digital video, audio, or communications channels and require a fixed half-band filter function. Its dedicated interpolating and decimating architecture can reduce the complexity of implementing equivalent FIR behavior in general-purpose logic or software. The verified 5 V operating range and surface-mount 44-MQFP package support conventional board-level integration. Engineering review should still cover clock-domain crossing, enable sequencing, ground-plane continuity, exposed-pad soldering, and the manufacturer's recommended input and output termination.
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推薦產品摘要
工程參考資料，適用於 TMC2242AKTCT — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 |
|---|---|
| Brand | onsemi |
| Manufacturer Heritage | Fairchild Semiconductor, now onsemi |
| Product Type | Digital half-band interpolating/decimating filter IC |
| Number of Filters | 1 |
| Cutoff or Center Frequency | 30 MHz |
| Digital Operation | 12-bit or 16-bit |
| Supply Voltage Range | 4.75 V to 5.25 V |
| Package | 44-MQFP (10 mm x 10 mm) |
| Mounting Type | Surface mount |
| Lifecycle Status | Active |
主要差異化特點
- Dedicated half-band processing function (對比TMC2242AKTC)
- Established 5 V digital integration range (對比TMC2242AKTC)
- Explicit active-production status (對比TMC2242AKTC)
設計說明
Route the digital clock and data signals as short, impedance-controlled nets, and place the device close to the source and destination devices. The verified package is 44-MQFP, so the pinout and exposed-pad layout must be taken directly from the manufacturer datasheet; do not infer connections from the 10 mm by 10 mm body size. If the package includes an exposed thermal pad, follow the manufacturer's solder, via, and land-pattern recommendations.
The TMC2242AKTCT requires a supply within 4.75 V to 5.25 V. Provide a stable 5 V rail with low impedance and place local high-frequency bypass capacitors close to the supply and ground pins. The verified results do not provide current consumption, so a final power budget requires the manufacturer supply-current figures and the actual operating clock and data rates.
Clock and data timing must be established before PCB sign-off because the supplied search snippets do not disclose setup time, hold time, maximum frequency, or propagation latency. Use the manufacturer's recommended clock topology and external components, account for board skew, and avoid introducing uncontrolled stubs into high-speed digital nets. Validate the final interface with representative source and destination devices.
Do not substitute TMC2242AKTC for TMC2242AKTCT solely because distributor snippets show the same 44-MQFP package and filter description. The final ordering suffix may distinguish packaging or orderable variants, and the supplied evidence does not define its meaning. Obtain manufacturer or authorized-supplier confirmation of electrical equivalence, packaging, moisture handling, and lifecycle status before using it as a drop-in replacement.
合規資訊
The supplied verified results do not contain explicit RoHS, REACH, lead-free, halogen-free, or conflict-minerals statements. The device is a digital filter IC rather than an automotive-qualified power component, so AEC-Q100 is recorded as not applicable based on the product function.
