MK2308S-1HI - 133MHz Zero Delay Buffer | Renesas | Clock IC
MPN： MK2308S-1HI ✓ 啟用中MK2308S-1HI 概覽
A zero-delay buffer is a clock-distribution circuit that reproduces an input clock at multiple outputs while compensating for propagation delay through an internal phase-locked loop. It is used where a system must fan one clock source across several loads without introducing excessive output-to-output skew. The MK2308S-1HI can produce outputs from its PLL for zero-delay operation or directly from the input for testing. Its outputs can also be placed in tri-state or stopped-clock conditions, providing control functions useful in multi-domain clock trees.
Key verified features include a maximum operating frequency of 133 MHz, eight outputs, one circuit, a PLL with bypass capability, and output skew of 200 ps. The CMOS bus interface supports integration with digital logic operating from the same 3.0 V to 3.6 V supply. The 16-SOIC surface-mount package provides a practical option for established through-hole-compatible board layouts and factory assembly processes.
Technically, the device uses proprietary low-jitter PLL techniques to generate eight low-skew clock outputs. The PLL-based architecture is significant because it compensates for internal buffer propagation delay while distributing the clock. Direct-input bypass provides a diagnostic path for evaluating signal behavior without relying on the PLL-generated output mode. Output tri-state and stop-clock controls allow unused clock branches to be disabled or held according to system requirements.
Typical applications include networking equipment, computing systems, telecommunications infrastructure, server clock trees, industrial control electronics, and communication modules. Its eight-output organization suits designs that must feed multiple clock domains, while the 133 MHz ceiling covers common legacy and industrial digital clocking requirements. The 3.3 V supply range also makes it suitable for systems whose logic rails are centered around 3.3 V.
When laying out a circuit using the MK2308S-1HI, preserve short and symmetrical clock paths from the device to each destination and follow the manufacturer's decoupling and layout recommendations. Validate output timing at the receiver, especially when fanout, trace length, or capacitive loading changes. Because the verified data does not provide the complete pinout, output-enable truth table, or absolute timing limits, those details should be confirmed against the manufacturer datasheet before release.
This page consolidates the verified Renesas and distributor information for the MK2308S-1HI, adds application-specific engineering context, identifies the available same-package comparison, and clearly separates confirmed specifications from parameters that still require datasheet verification.
直接替換替代品，適用於 MK2308S-1HI — 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。
此系列的變體
與下列產品可直接替換的同系列型號： MK2308S-1HI （相同外形與佔位） — 差異在於 Device Type, Number of Outputs, Output Control, Package, Supply Voltage Range.
MK2308S-1H
✅ 直接替換聯絡詢價
查看資料表 →MK2308S-1HI 規格
| Device Type | Zero Delay Buffer IC |
| Maximum Frequency | 133 MHz |
| Number of Circuits | 1 |
| 輸出數量 | 8 |
| Supply Voltage Range | 3 V to 3.6 V |
| 工作溫度範圍 | -40°C to +85°C |
| Output Skew | 200 ps |
| Bus Interface | CMOS |
| PLL | Yes, with bypass |
| Input Clock | Clock |
| 輸出類型 | CMOS-compatible |
| 封裝 | 16-SOIC (0.154 inch, 3.90 mm width) |
| 安裝類型 | Surface Mount |
| Output Control | Tri-state and stop-clock modes |
| Phase Noise | Low phase noise |
| Jitter | Low jitter |
MK2308S-1HI 16-soic (0.154 inch, 3.90 mm width) 腳位配置指南
MK2308S-1HI（16-soic (0.154 inch, 3.90 mm width) 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： MK2308S-1HI.
請參閱 資料表 以查看完整腳位配置。
典型應用
MK2308S-1HI 適用於 6 應用s: Networking Equipment Clock Distribution, Telecommunications Infrastructure, Computing System Clock Trees, Industrial Control Electronics, Server and Storage Clock Distribution, Communication Modules.
Networking Equipment Clock Distribution
The MK2308S-1HI is a candidate for distributing one system clock across eight destinations in networking equipment because it combines eight outputs with operation up to 133 MHz and 200 ps output skew. It is placed between the main clock source and receiver-facing clock domains, with its PLL-based outputs compensating for internal buffer delay. The 3.0 V to 3.6 V supply range aligns with common 3.3 V logic systems. Before deployment, verify receiver setup and hold requirements, output enable timing, and the maximum permissible loading against the manufacturer datasheet. Trace lengths should also be checked to prevent data-dependent skew from becoming the dominant board-level timing error.
推薦
Telecommunications Infrastructure
The MK2308S-1HI fits telecommunications infrastructure applications that require one clock source to feed multiple low-frequency digital blocks. Its eight outputs allow the clock tree to fan out to separate line-card or interface sections without using eight separate buffer packages, while the PLL-based zero-delay operation addresses internal propagation delay. The specified 133 MHz ceiling covers the stated operating class, and the -40°C to +85°C range supports industrial equipment. Integration still requires checking the receiver’s timing budget and whether the interface logic shares the device’s CMOS voltage levels. Controlled use of tri-state and stop-clock outputs can also prevent unused branches from consuming power or toggling when the subsystem is inactive.
推薦
Computing System Clock Trees
The MK2308S-1HI can serve as an eight-output clock tree element in computing systems requiring low-skew distribution at frequencies up to 133 MHz. Its 200 ps specified output skew is the relevant metric when comparing clock branches, because it indicates the variation among outputs rather than the absolute delay from the input. The device uses PLL-based zero-delay operation, while direct-input bypass provides a useful test path. Designers should preserve symmetry in trace routing and account for load-dependent delay at each destination. Because the supplied data does not include absolute propagation-delay limits, rise-time limits, or output loading limits, those values must be obtained from the Renesas datasheet before sign-off.
推薦
Industrial Control Electronics
The MK2308S-1HI is suitable for industrial control electronics requiring several synchronized clocks within a 3.3 V digital system. Its -40°C to +85°C operating range, 133 MHz maximum operating frequency, and eight-output architecture support controller, interface, and communications clock branches. The PLL-based design provides low-skew zero-delay outputs, while tri-state and stop-clock functions give the system additional control over inactive branches. Implementers should validate timing over the full industrial temperature range, isolate noisy switching nodes from sensitive clock traces, and provide local supply decoupling. The verified data does not state input jitter tolerance or power-consumption limits, so those parameters require confirmation before this device is assigned to a safety- or production-critical clock tree.
推薦
Server and Storage Clock Distribution
The MK2308S-1HI can be evaluated for legacy server, storage, or interface-controller clock trees that need as many as eight local clock destinations at up to 133 MHz. The eight-output arrangement reduces the number of separate distribution stages, while the specified 200 ps skew provides a useful initial comparison point across outputs. Its CMOS interface and 3.0 V to 3.6 V operating range are compatible with systems designed around 3.3 V logic. The main design tradeoff is that the verified information does not provide input-jitter, absolute-delay, or loading limits, so it cannot replace receiver-specific timing analysis. Keep clock traces short and similarly terminated, and validate operation with the intended loads and the final PCB stack-up.
推薦
Communication Modules
The MK2308S-1HI is a candidate for compact communication modules requiring multiple low-skew clock outputs from one source. Eight outputs can feed serializer, deserializer, controller, and status-interface clock domains, and operation up to 133 MHz provides useful margin for many legacy communication paths. The PLL can provide zero-delay outputs, while bypass allows direct-input testing of clock behavior. Because module boards often combine sensitive timing circuits with switching circuitry, engineers should separate the clock traces from high-current edges and follow the manufacturer’s recommended decoupling arrangement. The verified -40°C to +85°C range supports industrial communication environments, but final qualification should include jitter sensitivity, output loading, and timing-margin measurements under the module’s actual operating conditions.
推薦
推薦產品摘要
工程參考資料，適用於 MK2308S-1HI — 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 | MK2308S-1H |
|---|---|---|
| Package | 16-SOIC (0.154 inch, 3.90 mm width) | 16-SOIC (0.154 inch, 3.90 mm width) |
| Brand | Renesas Electronics | Renesas Electronics |
| Maximum Frequency | 133 MHz | 133 MHz |
| Number of Circuits | 1 | 1 |
主要差異化特點
- Eight-output clock distribution (對比MK2308S-1H)
- Industrial temperature specification (對比MK2308S-1H)
- PLL-based zero-delay operation with bypass (對比MK2308S-1H)
設計說明
Route the reference clock and all eight outputs with short, symmetrical paths so that PCB propagation-delay differences do not dominate the device’s specified 200 ps output skew. Match trace lengths where practical, avoid vias on timing-critical branches, and keep the clock away from switching-power nodes and high-current return paths. Confirm that trace capacitance and receiver loading remain within the manufacturer’s output-loading limits before release.
Use a low-noise 3.3 V supply and place the manufacturer-recommended bypass capacitors close to the supply and ground pins. The verified operating range is 3 V to 3.6 V, but that range alone does not define acceptable ripple or transient response. Use the Renesas datasheet to determine decoupling requirements, supply-current limits, and whether the bypass and PLL-bypass modes require separate layout treatment.
Do not select a substitute based only on the 133 MHz and 16-SOIC labels. The supplied data does not establish the complete pinout, control truth table, absolute-maximum ratings, jitter tolerance, or output loading for each suffix. Before replacing the MK2308S-1HI, compare those items for the exact ordering code and verify that tri-state, stop-clock, and PLL-bypass behavior remains compatible with the system firmware and board layout.
合規資訊
The supplied manufacturer and distributor extracts do not contain explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. The MK2308S-1HI is an industrial-temperature clock IC rather than an automotive-qualified product in the provided information, so AEC-Q100 is treated as not applicable pending confirmation from the manufacturer.
