MASC-38040 - 28.9 GBaud 4-Channel PAM-4 CDR | MACOM
部品番号: MASC-38040 ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
MASC-38040 概要
A clock and data recovery retimer is an IC that recovers a usable clock from a high-speed serial stream, resynchronizes data, and can compensate for accumulated timing and jitter problems. In the optical and digital-communications hierarchy, the MASC-38040 belongs to retiming CDR and clock-and-data recovery devices used in PAM-4 links operating at tens of gigabauds.
Key features include reference-free operation across 25.78 to 28.9 GBaud, four independently controllable channels, bypass support, and a single 1.8 V power rail. The two-wire I2C-compatible control path simplifies configuration of multiple lanes. These characteristics suit systems requiring one retiming device to manage several parallel high-speed links rather than using separate single-channel recovery circuits.
Technically, the device is positioned for 56G-class PAM-4 receive paths, where source, package, connector, and trace losses can impair timing recovery. Reference-free CDR operation is useful when the transmitter does not provide a separate usable reference. Bypass mode adds deployment flexibility for legacy or nonstandard rates, although the verified source does not specify which rates and modes are supported.
Typical uses include 400G and 800G optical receivers, coherent communication modules, high-speed optical DSP test systems, and parallel data links. Each lane can be configured through the common control interface, helping synchronize operating states across a multi-channel receiver.
PCB design should preserve short high-speed differential routes, continuous reference planes, and symmetrical via transitions. The 1.8 V rail requires local high-frequency decoupling and adequate return paths. Engineers must consult the manufacturer documentation for exact pin assignments, electrical limits, channel-count interpretation, bypass behavior, and exposed-pad requirements.
This page consolidates the verified manufacturer specifications and explicitly identifies missing technical, commercial, pinout, compliance, and replacement data rather than estimating it. It also distinguishes a true pin-compatible replacement from unrelated QFN clock-and-data recovery devices.
ドロップイン代替品: MASC-38040 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
この製品に利用可能なドロップイン代替品はありません。
代替品をリクエストMASC-38040 仕様
| Product Type | Reference-free clock and data recovery retimer |
| Channel Count | 4 channels |
| Minimum Line Rate | 25.78 GBaud |
| Maximum Line Rate | 28.9 GBaud |
| Signaling Format | PAM-4 |
| Maximum Aggregate Data Rate | 115.6 Gb/s |
| 電源電圧 | 1.8 V |
| Power Supply Configuration | Single supply |
| Control Interface | Two-wire I2C-compatible interface |
| Channel Control | Each channel is independently controllable |
| Reference Requirement | Reference-free operation |
| Bypass Function | Supports legacy or nonstandard data rates |
| パッケージ | 5.2 mm x 5.2 mm QFN-compatible package |
| 実装タイプ | Surface mount |
MASC-38040 5.2 mm x 5.2 mm qfn-compatible package ピン配置ガイド
MASC-38040 (5.2 mm x 5.2 mm qfn-compatible package パッケージ) のピン配置。 ピン番号、機能、接続図はメーカーのデータシートで定義されています。正確なフットプリントとはんだ付けのガイドラインについては、データシートを参照してください。
詳細なピン配置データはありません: MASC-38040.
詳細は データシート をご参照ください。
主な用途
MASC-38040 の用途: 6 件s: 400G PAM-4 Optical Receive Path, 800G Parallel Optical Interface, Coherent Optical Communication Module, High-Speed Network Interface Test Equipment, Server Data-Center Link Card, High-Speed Backplane Retiming.
400G PAM-4 Optical Receive Path
The MASC-38040 fits four-channel PAM-4 receive architectures because each lane can recover and retime signals from 25.78 GBaud through 28.9 GBaud. Placing the CDR between the receive frontend and downstream processing can isolate accumulated timing uncertainty before data reaches a digital signal processor. Its reference-free operation removes dependence on a separate transmitter clock, while bypass mode provides flexibility for legacy or nonstandard links. The exact optical reach and whether four lanes map directly to one 400G interface require architecture-level verification.
800G Parallel Optical Interface
Four channels at up to 28.9 GBaud provide 115.6 GBaud of aggregate serial signaling, making the MASC-38040 relevant to multi-lane 800G optical concepts. Each channel can be managed through the common two-wire I2C-compatible interface, reducing control complexity across a parallel link. Reference-free CDR operation supports systems that recover timing directly from received data. Designers must still verify module power, channel loss, thermal performance, lane retiming limits, and the required bypass state for each operating mode.
Coherent Optical Communication Module
The MASC-38040 can support high-speed data-recovery points in coherent optical modules where PAM-4 service paths operate within the 25.78-to-28.9 GBaud range. Reference-free operation is useful when a module must derive timing from the received stream, and four-channel support can consolidate repeated retiming functions. The single 1.8 V supply simplifies low-voltage integration compared with a multi-rail design. Final suitability depends on the coherent DSP interface, allowable latency, optical-module power budget, and whether bypass must remain available during startup or calibration.
High-Speed Network Interface Test Equipment
The MASC-38040 is relevant to test systems that reproduce 56G-class PAM-4 links and evaluate receive timing behavior across four channels. Its narrow 25.78-to-28.9 GBaud operating range and reference-free architecture can exercise systems without supplying a separate reference clock. Bypass mode also allows legacy or nonstandard patterns to pass through during fixture or interoperability testing. Test-equipment developers must account for 1.8 V rail integrity, control firmware, channel skew, deterministic latency, and thermal behavior before production use.
Server Data-Center Link Card
A data-center link card can use the MASC-38040 as a four-lane PAM-4 retimer when it operates at 25.78 to 28.9 GBaud per lane. The four-channel implementation reduces the number of separate CDR packages required for a high-bandwidth interface, while I2C-compatible control supports centralized lane management. The device does not make a board compatible with a particular Ethernet or InfiniBand standard by itself; protocol support depends on the surrounding SerDes, PHY, DSP, and optical architecture. Signal-integrity simulations and thermal testing remain essential.
High-Speed Backplane Retiming
The MASC-38040 may be evaluated for backplane paths operating in its supported PAM-4 range when reference-free timing recovery and four-lane control are required. Retiming can extend usable link margin by regenerating data-edge timing before it reaches a downstream receiver. However, the supplied data does not specify reach, insertion loss, jitter tolerance, equalization, or deterministic latency. Those missing parameters must be compared against the complete channel budget before considering the device for a backplane rather than an optical module.
エンジニアリング参考データ: MASC-38040 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
設計ノート
Use fully differential, impedance-controlled routing for the high-speed lanes and keep the transmit and receive interfaces symmetric. Maintain a continuous reference plane beneath each interface and minimize stubs, connectors, and unnecessary via transitions. Because the verified data provides no insertion-loss or jitter-tolerance curves, do not infer channel margin from the 28.9 GBaud headline rate; validate the complete SerDes-to-CDR-to-DSP channel with the selected modules and operating modes.
Plan the single 1.8 V rail as a high-speed analog supply. Place the manufacturer's recommended decoupling network at the supply and ground pins, preserve a low-impedance return path, and keep digital I2C return current out of sensitive signal-reference regions. Exact capacitance, allowed ripple, and current limits are unavailable in the verified data, so derive those values from the current manufacturer datasheet and the total processing load rather than from generic CDR examples.
Do not assume that every similarly named MASC38040A, MASC38040B, or MASC38040B-PPR listing is a drop-in replacement. Revision suffixes can change qualification, temperature behavior, production status, or ordering conditions even when a distributor description is similar. Obtain the official ordering guide, compare package drawings and pin maps, and request written manufacturer compatibility before substituting any alternate suffix in an approved design.
コンプライアンス情報
No explicit compliance statements were supplied for the exact MASC-38040. Obtain current manufacturer declarations for the selected ordering code.
