ICS501MI - 140MHz LOCO PLL Clock Multiplier | Renesas Electronics
料号： ICS501MI ✗ 停产ICS501MI 概述
A PLL-based clock generator is a timing IC that phase-locks an output signal to a reference source and multiplies the reference frequency. In the broader clock and timing hierarchy, the ICS501MI belongs to the PLL clock-multiplier family, a type of clock and timing IC used for frequency synthesis, clock distribution, and digital system timing. Its LOCO designation reflects a low-cost oscillator architecture intended to provide economical frequency multiplication without requiring a separate high-frequency crystal resonator.
The ICS501MI accepts a fundamental-mode crystal or external clock source, making it useful for processor, communication, control, and embedded digital systems. The 140 MHz maximum output frequency provides ample headroom for systems requiring a higher-frequency operating clock from a lower-cost reference. Its 8-SOIC package is compatible with conventional surface-mount PCB assembly methods and is suitable for designs where component count and board area must be controlled.
The principal design consideration is ensuring that the reference crystal, external clock, feedback network, and output interface meet the timing requirements of the target system. The PLL must operate within the specified input and output frequency ranges, and the associated passive components should be placed close to the device to minimize clock noise and signal-integrity degradation. The output clock should be routed away from high-current switching nodes and noisy analog sections of the board.
Typical applications include digital controller clocking, communications equipment, embedded processors, industrial control systems, and general-purpose frequency multiplication. Using a PLL multiplier can reduce the number of specialized high-frequency crystals required in a design and provide a flexible way to derive multiple system timing domains. XAIPART provides an engineering-focused product record with manufacturer documentation, package information, practical design guidance, and verified sourcing details for design review and procurement.
直接替换替代料： ICS501MI ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ICS501MI （相同外形与封装尺寸） ——差异在于 Maximum Output Frequency, Package, Reference Input.
ICS501MILFT
✅ 直接替换📋 参考替代料（不在目录中）
ICS501MI 规格参数
| Product Type | LOCO PLL clock multiplier |
| Maximum Output Frequency | 140 MHz |
| Input Frequency Range | 2 MHz to 50 MHz |
| Reference Input | Fundamental-mode crystal or clock input |
| Output Description | High-quality, high-frequency clock output |
| Architecture | Phase-Locked Loop (PLL) |
| Oscillator Type | LOCO Low Cost Oscillator |
| 封装 | 8-SOIC |
| Package Width | 3.90 mm |
| Package Length | 0.154 in |
| 安装类型 | Surface Mount |
| 引脚数 | 8 pins |
| 功能 | Clock generation and frequency multiplication |
ICS501MI 0.154 in 引脚配置指南
ICS501MI（0.154 in 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： ICS501MI.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ICS501MI 适用于 6 应用s: Digital Processor Clocking, Industrial Control Systems, Communications Equipment, Data Acquisition and Conversion, Embedded Consumer Devices, Test and Measurement Instruments.
Digital Processor Clocking
The ICS501MI fits digital processor designs that need a higher operating clock than the available reference source. A lower-frequency crystal can feed the PLL, which can generate a clock up to 140 MHz for processor, controller, or programmable-logic clocking. This approach can simplify the resonator selection process while retaining an 8-SOIC surface-mount footprint. The important design checks are reference stability, PLL configuration, output-jitter requirements, and the processor’s allowable clock tolerance. Keep the crystal and feedback network close to the device, provide a clean ground reference, and route the output as a short clock trace away from high-current switching paths.
推荐
Industrial Control Systems
ICS501MI is suitable for industrial control equipment where multiple digital subsystems need a common, high-quality clock without requiring several specialized high-frequency crystals. The PLL multiplier accepts a reference in the 2 MHz to 50 MHz range and supports output frequencies up to 140 MHz, making it useful for control processors, data-conversion systems, and communications controllers. In an industrial design, account for temperature range, clock tolerance, supply regulation, and electromagnetic coupling from adjacent power stages. Validate the PLL behavior across the full intended frequency and load range before production release.
推荐
Communications Equipment
The ICS501MI can provide the multiplied reference clock needed by communications equipment that separates a lower-cost reference source from a higher-frequency internal timing domain. Its PLL-based architecture and 140 MHz output ceiling fit equipment requiring a compact clock-generation stage, including interface controllers, protocol processors, and line-card electronics. The clock quality assessment should include phase noise or jitter, reference stability, supply sensitivity, and the relationship between output frequency and system timing budget. Use short, controlled-impedance clock routing and isolate the output from high-speed data paths where crosstalk could affect timing margins.
推荐
Data Acquisition and Conversion
ICS501MI can serve as the clock source for data-acquisition and mixed-signal systems where a controller, converter, and digital processing section need a common timing reference. Deriving the clock through the PLL allows a lower-frequency crystal to support a faster internal clock domain, up to the device’s 140 MHz maximum output frequency. For analog measurement systems, preserve clock-to-data timing margin, isolate the clock from switching converters, and verify that the sampling architecture does not require a jitter specification tighter than the PLL can meet. Decoupling and reference-network placement remain critical for predictable clock quality.
推荐
Embedded Consumer Devices
The ICS501MI offers a compact way to derive a higher-frequency clock for compact embedded products, including controllers, interface modules, and smart-device peripherals. Its 8-SOIC package supports surface-mount assembly, while the LOCO PLL architecture can reduce reliance on higher-cost specialized crystal oscillators. Designers should confirm that the operating temperature, supply voltage, startup behavior, and clock-accuracy requirements of the end product are acceptable. Low-power operation should also be checked carefully because clock-generation topology, load, and activity state can influence overall system power consumption.
推荐
Test and Measurement Instruments
ICS501MI can support internal timing generation in test and measurement instruments that need a stable digital reference for control logic, data capture, or communications. By multiplying a lower-frequency reference to as much as 140 MHz, the device can help reduce the number of distinct clock sources required in a multi-section instrument. The clock must remain isolated from sensitive analog paths, and timing accuracy should be characterized over the required input range and temperature span. Use a low-noise reference arrangement and verify startup settling before beginning precision measurements. The manufacturer datasheet remains the controlling source for electrical limits and application conditions.
推荐
推荐产品汇总
工程参考数据： ICS501MI ——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 | ICS501MILFT |
|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics |
| Package | 8-SOIC | 8-SOIC - same |
| Product Type | LOCO PLL clock multiplier | LOCO PLL clock multiplier |
| Maximum Output Frequency | 140 MHz | 140 MHz |
| Input Frequency Range | 2 MHz to 50 MHz | 2 MHz to 50 MHz |
| Reference Input | Crystal or clock input | Crystal or clock input |
| Architecture | PLL frequency multiplication | PLL frequency multiplication |
| Pin Compatibility | 8-SOIC pin configuration | Complete replacement with consistent terminals |
| Mounting Type | Surface Mount | Surface Mount |
| Ordering Suffix | MI | MILFT tube-packaging option |
关键差异点
- Documented complete replacement （对比 ICS501MILFT)
- PLL-based clock multiplication （对比 ICS501MILFT)
- Compact surface-mount implementation （对比 ICS501MILFT)
设计说明
Place the crystal, crystal-load capacitors, and PLL feedback components close to the ICS501MI pins. Keep the clock output route short and provide a continuous ground reference beneath the device. Avoid routing the output through areas containing switching-regulator traces, relay contacts, or high-slew-current digital signals because coupling can degrade clock stability.
Confirm that the selected reference remains between 2 MHz and 50 MHz and that the requested output does not exceed 140 MHz at startup, across temperature, and at maximum operating conditions. Treat the PLL as a feedback system rather than an ideal frequency converter: use the manufacturer reference network and verify phase noise, jitter, and startup settling before treating the clock as production-ready.
Decouple the supply pins according to the manufacturer layout guidance and provide a quiet source for the reference clock. Check the exact supply-voltage and current limits in the Renesas 501 datasheet before finalizing the regulator. Adequate local decoupling reduces supply disturbance at the clock generator, while a stable reference rail improves repeatability across power-supply and temperature conditions.
合规信息
The device is a clock and timing IC rather than an automotive-qualified product. Compliance attributes are not stated in the available manufacturer and distributor information.
