FMS6502 - 8x6 Video Switch Matrix TSSOP-24 | onsemi
MPN： FMS6502 ✓ 啟用中FMS6502 概覽
A video switch matrix (also called a crosspoint switch) is an analog routing IC that belongs to the video conditioning and audio/video ASSP family within the broader interface IC category. Its role in the system hierarchy is to sit between multiple video sources (such as decoders, tuners, or SoC outputs) and multiple video sinks (encoders, displays, or recorders), replacing banks of discrete analog multiplexers and buffer amplifiers.
Key features include an 8x6 crosspoint architecture in which each input can be routed to one or more outputs, while only one input may drive any given output at a time, preventing bus contention. Each input supports an integrated clamp option that sets the output sync tip level of video with sync to approximately 300 mV, which is essential for maintaining correct black-level reference in composite and S-Video signals. Alternatively, the input may be internally biased to center outputs without sync (Chroma, Pb, Pr) at a defined mid-level, supporting component video formats.
Architecturally, the device integrates output drivers on every output, eliminating the external buffer stages that discrete crosspoint solutions require. The I2C serial interface allows full matrix reconfiguration, and the onsemi VIPDEMO evaluation platform supports single-register read and write operations for I2C bring-up and debugging.
Typical applications include set-top boxes, DVD recorders and players, video servers, CCTV/security video routing, automotive rear-seat entertainment, and any multi-source/multi-display video system requiring glitch-free source selection.
Design consideration: choose clamp mode for signals containing sync and bias mode for sync-less component signals; incorrect mode selection shifts the DC operating point of the downstream video path. Verify I2C register maps against the onsemi datasheet before board bring-up.
This page synthesizes distributor pricing, drop-in alternatives, lifecycle status, and practical design notes not found in the manufacturer datasheet alone.
直接替換替代品，適用於 FMS6502 — 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。
FMS6502MTC24X
✅ 直接替換📋 參考替代品（不在目錄中）
FMS6502MTC24
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ZL6502
✅ 直接替換📋 參考替代品（不在目錄中）
FMS6502 最大額定值與電氣特性
| 功能 | 8-Input, 6-Output Video Switch Matrix |
| Matrix Configuration | 8 x 6 crosspoint |
| Output Drivers | Integrated on all 6 outputs |
| Input Clamp | Yes, sync tip to ~300 mV |
| Control Interface | I2C serial interface |
| Bias Mode | Internal bias for sync-less signals (Chroma, Pb, Pr) |
| Routing Rule | One input to many outputs; one input per output max |
| 封裝 | 24-TSSOP (MTC) |
| 安裝類型 | Surface Mount |
| Channel Configuration | 1 Channel switch IC |
| RoHS 狀態 | Lead free / RoHS Compliant |
| Packaging Variant | FMS6502MTC24X (tape and reel) |
FMS6502 24-tssop (mtc) 腳位配置指南
FMS6502（24-tssop (mtc) 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： FMS6502.
請參閱 資料表 以查看完整腳位配置。
典型應用
FMS6502 適用於 6 應用s: Set-Top Box Video Routing, DVD Recorders and Players, CCTV and Security Video Routing, Automotive Rear-Seat Entertainment, Video Servers and Multi-Output Distribution, Consumer AV Source Selection.
Set-Top Box Video Routing
Set-top boxes must select among tuner, demodulator, and external AV inputs before feeding the encoder or display path. The FMS6502 fits because its 8x6 matrix covers the full source/sink count of a typical STB with margin, while its integrated output drivers remove the external buffer amplifiers a discrete mux design needs. The per-input clamp sets the sync tip of composite/S-Video with sync to ~300 mV, preserving correct black level through the switching stage, and bias mode handles Chroma, Pb, Pr component streams. I2C control integrates cleanly with the STB SoC, and at roughly $0.20 in volume it adds minimal BOM cost. The 24-TSSOP package keeps board area small in cost-driven consumer housings.
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DVD Recorders and Players
DVD recorders switch among TV tuner output, external composite/S-Video inputs, and internal playback paths, then route the selected video to both the record encoder and the on-screen display path simultaneously. The FMS6502 addresses this because one input can be routed to multiple outputs, letting a single source feed both encoder and monitor output without external fan-out buffers. The integrated clamp maintains the ~300 mV sync tip reference that analog-to-digital video encoders require for stable picture levels, while bias mode suits Chroma/Pb/Pr signals without sync. The I2C register interface allows the recorder firmware to switch sources glitch-consciously under microcontroller control, and the 24-TSSOP footprint integrates into dense consumer mainboards.
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CCTV and Security Video Routing
Surveillance installations frequently need to route several camera outputs to multiple monitors, recorders, or quad processors. The FMS6502 provides eight camera inputs to six destinations in one IC, with any input routable to multiple outputs so operators can mirror a camera feed to both a spot monitor and a recording chain. The integrated clamp option re-establishes the sync tip level of composite camera signals at approximately 300 mV after long cable runs, improving picture stability at the receiving end. Output drivers on all six outputs give adequate drive for 75-ohm video distribution without extra buffering in short-reach systems. I2C control enables automated sequencing and multiplexing patterns managed by the DVR firmware.
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Automotive Rear-Seat Entertainment
In-vehicle entertainment systems distribute DVD or media-player video to several seatback displays while switching between external inputs such as gaming consoles or camera feeds. The FMS6502 suits this role with its eight-input, six-output matrix and integrated output drivers capable of feeding multiple display drop points. Bias mode supports sync-less component signals (Pb, Pr) used by some automotive video sources, while clamp mode handles composite feeds. The compact 24-TSSOP surface-mount package and single-supply integration reduce board area in head-unit designs. At about $0.20 at volume (as of 2026-09-14), it is cost-effective for consumer-grade automotive AV, though AEC-Q100 qualification status should be confirmed with onsemi for automotive builds.
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Video Servers and Multi-Output Distribution
Video servers and distribution amplifiers need to fan a small number of sources to multiple isolated outputs. Because the FMS6502 allows each input to be routed to one or more of the six outputs, a single IC acts as both switch and distribution amplifier: eight sources can be mirrored to up to six destinations with integrated drivers, and the per-input clamp keeps sync tip levels consistent across all fan-out copies at ~300 mV. The I2C interface allows dynamic re-routing under software control, useful in rack systems with hot source changes. In designs needing more than eight sources or six outputs, multiple FMS6502 devices can be cascaded, sharing the I2C bus with device addressing managed at the controller level.
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Consumer AV Source Selection
General consumer AV equipment - AV selectors, projectors with multiple inputs, and portable players - benefits from the FMS6502's combination of matrix flexibility and integration. Discrete mux plus buffer chains for an 8x6 configuration would occupy considerably more board area and introduce level-matching variance between channels, whereas the FMS6502 provides matched clamp and bias circuits on every input, keeping sync tip levels at ~300 mV uniformly. The I2C bus control ties directly into existing microcontroller-based systems, and the onsemi VIPDEMO platform supports register-level debugging during development. Its active lifecycle status at onsemi and multi-source availability (DigiKey FMS6502MTC24X, independent stock) reduce sourcing risk for continued production.
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推薦產品摘要
工程參考資料，適用於 FMS6502 — 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 | FMS6502MTC24X | FMS6502MTC24 | ZL6502 |
|---|---|---|---|---|
| Package | 24-TSSOP (MTC) | 24-TSSOP (MTC) - same | 24-TSSOP (MTC) - same | 24-TSSOP - claimed same (verify) |
| Brand | onsemi | onsemi | onsemi | Independent (ZL) |
| Manufacturer Cross-Reference | Base MPN (Fairchild origin) | Official onsemi orderable P/N | Official onsemi ordering suffix | Not in official cross-reference |
主要差異化特點
- Integrated output drivers eliminate external buffers (對比ZL6502 (unverified secondary source))
- Dual-mode inputs: clamp or bias (對比Discrete mux solutions)
- Manufacturer-backed continuity via FMS6502MTC24X (對比ZL6502)
設計說明
Never configure two inputs to the same output: the datasheet states only one input may be routed to any output. Simultaneous assignment causes output contention and distorted video. In firmware, validate the routing table before each I2C write - maintain a shadow register map of the current input-per-output assignments and reject any update that would double-assign a destination. Also select clamp mode only for signals containing sync; using clamp on sync-less Chroma/Pb/Pr signals shifts the DC operating point and can clip the picture.
Route the eight video inputs and six outputs as 75-ohm controlled-impedance traces where board space permits, and keep the matrix's analog domain away from the I2C clock lines to prevent clock coupling into video. Use back-termination or series resistors on outputs driving long cables, since the integrated drivers are designed for consumer-length runs rather than long distribution spans. During development, use the onsemi VIPDEMO platform to read back registers and confirm the actual routing matches your intended matrix before measuring video performance.
Estimated: the exact supply voltage and current for the FMS6502 are not included in the data verified for this page, so confirm pin supply requirements from the onsemi datasheet before designing the power tree. As a general practice for video matrices of this class, decouple the analog supply with 0.1 uF ceramic capacitors placed within a few millimeters of each supply pin, plus bulk 10 uF per rail, and provide a solid analog ground return under the TSSOP to keep video crosstalk and supply-induced hum out of the switched signals.
合規資訊
Traco Semiconductor lists Lead free / RoHS Compliant status for FMS6502. REACH, halogen-free, and conflict-minerals declarations were not found in the verified data - request material declarations from onsemi per orderable P/N.
