ICS651MT - 200MHz 1:4 Clock Buffer | Renesas | 8-SOIC
MPN: ICS651MT ✗ Son Kullanım ZamanıICS651MT Genel Bakış
A clock buffer, also called a clock driver or fanout buffer, is a digital timing IC that reproduces an input clock onto multiple outputs with controlled propagation delay and low output-to-output skew. Clock buffers belong to the clock and timing hierarchy, alongside clock generators, phase-locked loops, jitter cleaners, dividers, and delay lines. Their purpose is to restore signal integrity, isolate the source from capacitive loading, and provide matched clock branches in systems where a single clock cannot directly drive every destination.
The ICS651MT is identified as a low-skew, single-input, four-output clock buffer in the ICS ClockBlocks family. Verified specifications list a maximum frequency of 200 MHz, a 1.425 V to 2.625 V supply range, 250 ps skew, and a commercial operating-temperature range of 0 C to 70 C. Its four-output architecture supports economical distribution without implementing four separate discrete buffers. The SOIC-8 package also supports conventional surface-mount manufacturing and inspection processes.
Operationally, the buffer preserves the clock waveform while adding fanout capability. The verified datasheet guidance specifies a 0.01 uF decoupling capacitor between VDD on pin 7 and GND on pin 6, placed as close to the device as possible. It also states that a 33 ohm series terminating resistor may be used on each clock output when the trace is longer than 1 inch. These recommendations reduce supply-noise coupling, ringing, and reflections on longer clock routes.
Typical uses include processor-clock distribution in embedded equipment, communication-interface clock fanout, general-purpose logic clock distribution, and fanout for digital converters or controllers. Because this is a four-output buffer rather than a clock generator, an external clock source is required. The source must provide a valid clock waveform within the device's specified frequency and supply-voltage limits, and each connected load must be checked for timing margin.
The primary design trade-off is output loading versus timing margin. Short, lightly loaded traces may not need source termination, while long PCB routes can develop edge reflections that reduce setup and hold margin. Place the decoupling capacitor at the supply pins, use short output branches, and evaluate rise time, fanout, and skew at the actual operating frequency before releasing the layout.
This product page consolidates the verified clock-buffer specifications, application guidance, comparison fields, and practical implementation notes. It distinguishes documented electrical and packaging data from unavailable lifecycle, pricing, and pinout details so engineers can make sourcing decisions without treating unverified values as established facts.
Drop-in alternatifler için ICS651MT — aynı paket, pin-başına uyumlu. PCB yeniden montajı gerektiren farklı paket bileşenleri dışlanmıştır.
Bu Serideki Variantlar
Yedek parça uyumlu olan aynı serideki modeller ICS651MT (aynı form faktörü ve ayağa oturma) — farklı olan Package, Device Type, Supply Voltage Range, Maximum Frequency, Category.
ICS651M
✅ Yerleştirme ⚠️ Onaylanmamış ÖzelliklerFiyat için iletişime geçin
Veri Şablonunu Görüntüle →ICS551M
✅ Yerleştirme ⚠️ Onaylanmamış ÖzelliklerFiyat için iletişime geçin
Veri Şablonunu Görüntüle →ICS542M
✅ Yerleştirme ⚠️ Onaylanmamış ÖzelliklerFiyat için iletişime geçin
Veri Şablonunu Görüntüle →ICS502M
✅ Yerleştirme ⚠️ Onaylanmamış ÖzelliklerFiyat için iletişime geçin
Veri Şablonunu Görüntüle →ICS501M
✅ Yerleştirme ⚠️ Onaylanmamış ÖzelliklerFiyat için iletişime geçin
Veri Şablonunu Görüntüle →ICS651MT Özellikler
| Device Type | Fanout Buffer (Distribution) |
| Clock Buffer Configuration | 1 input to 4 outputs |
| Maximum Frequency | 200 MHz |
| Supply Voltage Range | 1.425 V to 2.625 V |
| Alternate Supply Voltage Range | 1.42 V to 2.62 V |
| Input Signal Type | Clock |
| Output Signal Type | Clock |
| Output Skew | 250 ps |
| Interface Standard | CMOS |
| İşletim Sıcaklığı Aralığı | 0 C to 70 C |
| Paket | 8-pin SOIC, 0.150 inch |
| Montaj Türü | Surface Mount |
| Decoupling Capacitor | 0.01 uF between VDD and GND |
| Series Output Termination | 33 ohm for clock traces longer than 1 inch |
ICS651MT 8-pin soic, 0.150 inch Pin Yapısı Kılavuzu
ICS651MT (8-pin soic, 0.150 inch paket) için pin yapısı. Pin numaralandırma, işlevleri ve bağlantı şemaları üretici veri kitapçığında tanımlanmıştır. Doğru ayak ve soldurma kılavuzları için onu referans alın.
Ayrıntılı pin çıkış verisi mevcut değil: ICS651MT.
Aşağıdaki veri sayfası tam pin konfigürasyonu için.
Tipik Uygulamalar
ICS651MT için uygundur 6 uygulamas: Processor Clock Distribution, Communication Interface Clock Fanout, General-Purpose Logic Clock Fanout, Digital Converter and Controller Clocks, Test and Measurement Equipment, Embedded Control Module Clocking.
Processor Clock Distribution
The ICS651MT fits processor-clock distribution when one source must feed up to four receiving circuits at no more than 200 MHz. Its 1:4 configuration reduces the electrical loading presented directly to the clock oscillator and gives each destination a dedicated buffered output. The documented 250 ps skew provides a concrete basis for assessing relative arrival time. Place the 0.01 uF supply capacitor beside VDD pin 7 and GND pin 6, keep branches short, and consider a 33 ohm series resistor on traces longer than 1 inch. Although a four-output buffer simplifies fanout, the system timing budget must still include source jitter, propagation delay, receiver setup and hold requirements, and PCB delay.
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Communication Interface Clock Fanout
ICS651MT is appropriate for communications equipment that must distribute a common clock to multiple interface or controller sections. The four CMOS outputs can isolate one source from several capacitive destinations, while operation across a 1.425 V to 2.625 V supply supports low-voltage digital clock domains. The 200 MHz maximum frequency provides substantial performance margin for many communication links, although the actual usable rate depends on the source, receivers, and timing budget. Keep each branch short and route outputs away from noisy power and switching nodes. If a destination is farther than 1 inch, the manufacturer guidance supports a 33 ohm series resistor at the output to limit reflections and preserve clock-edge quality.
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General-Purpose Logic Clock Fanout
The ICS651MT can distribute a logic clock among counters, flip-flops, serializers, and digital controllers in compact industrial or embedded equipment. Its 1:4 fanout is useful when several sequential blocks need a common edge but cannot be connected directly to one oscillator output. Verified specifications identify a CMOS interface, 250 ps skew, and a 0 C to 70 C commercial operating range. The principal implementation concern is edge quality rather than nominal frequency alone. Use the specified 0.01 uF decoupling capacitor at the power pins, avoid long parallel routes, and evaluate source termination for branches longer than 1 inch. Confirm downstream setup and hold timing because output skew and trace delay can reduce the available margin even when nominal clock frequency is acceptable.
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Digital Converter and Controller Clocks
ICS651MT can provide local clock branches to digital converters, controllers, or sampling subsystems requiring a common timing reference. The four outputs help isolate the reference source from each receiver, and the 200 MHz ceiling covers the needs of many moderate-speed digital conversion systems. The buffer does not generate or synthesize a clock, so the upstream oscillator must provide a clean signal with adequate amplitude, jitter, and duty-cycle margin. Decouple VDD and GND directly at the IC as directed, and keep the clock outputs away from switching-current paths that could inject jitter through supply coupling. For traces longer than 1 inch, evaluate a 33 ohm source resistor to damp reflections before validating converter timing across temperature.
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Test and Measurement Equipment
Within test and measurement equipment, ICS651MT can fan a reference clock into acquisition, control, and data-conversion sections while reducing source loading. Its 250 ps documented skew and 200 MHz maximum frequency make it a candidate for moderate-speed instrumentation, but system-level jitter and deterministic latency must be evaluated rather than inferred from the skew figure alone. The 8-pin SOIC footprint simplifies assembly in a larger instrument. Follow the recommended 0.01 uF local decoupling and use 33 ohm output damping for long traces. The 0 C to 70 C operating range supports room-temperature commercial equipment but is not sufficient by itself for extended industrial or automotive environmental requirements.
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Embedded Control Module Clocking
ICS651MT is suitable for distributing a low-voltage clock within compact embedded-control modules that include a microcontroller and several peripheral blocks. Its 1.425 V to 2.625 V operating range is compatible with low-voltage CMOS systems, while the 1:4 topology supports clocks for a processor, serial interface, and other sequential logic. The commercial temperature range of 0 C to 70 C is appropriate for indoor equipment. Layout remains critical: place the 0.01 uF capacitor directly across the supply pins, preserve a continuous ground return, and avoid crossing the clock route with switching-node traces. If a branch exceeds 1 inch, the manufacturer recommends a 33 ohm series resistor to control ringing and maintain reliable setup and hold margins.
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Önerilen Ürünler Özeti
Mühendislik referans verileri: ICS651MT — karşılaştırma, tasarım rehberi ve uyumluluk bilgileri.
Seçim Kılavuzu
Alternatiflerle Karşılaştırma
| Parametre | Bu Ürün | ICS651M | ICS551M | ICS542M | ICS502M | ICS501M |
|---|---|---|---|---|---|---|
| Package | SOIC-8 | SOIC-8 | SOIC-8 | SOIC-8 | SOIC-8 | SOIC-8 |
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
Ana Farklılayıcılar
- Documented four-output clock distribution (karşılaştırma:ICS501M)
- Low-skew specification (karşılaştırma:ICS551M)
- Defined low-voltage CMOS operating range (karşılaştırma:ICS542M)
- Explicit PCB implementation guidance (karşılaştırma:ICS502M)
Tasarım Notları
Place the required 0.01 uF decoupling capacitor between VDD pin 7 and GND pin 6 as close to the device as possible. Keep the connection short and use an uninterrupted ground return to reduce supply-current loop area. This arrangement is explicit in the indexed manufacturer PDF and is particularly important in systems where the clock buffer is positioned near a noisy digital or switching supply.
The manufacturer recommends a 33 ohm series terminating resistor on each clock output when its trace is longer than 1 inch. Place the resistor close to the clock-driver output so the driven segment remains short. Validate the arrangement with an oscilloscope at the actual receiver because the useful damping value can depend on trace geometry, load capacitance, source impedance, and clock rise time.
Do not treat the 200 MHz maximum frequency as proof that every receiver will operate reliably at 200 MHz. Include source jitter, output skew, propagation delay, PCB delay, receiver setup and hold time, and load capacitance in the timing budget. Also avoid treating the four outputs as unrestricted fanout: each branch must meet CMOS input thresholds and signal-integrity requirements.
Uyumluluk Bilgisi
The supplied snippets do not contain explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements. The commercial operating-temperature range of 0 C to 70 C is verified but does not establish AEC-Q100 qualification.
