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Home Products Crystals, Oscillators, Resonators Oscillators~~SIT1602BC-71-28N-37.500000G~~

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SIT1602BC-71-28N-37.500000G - SiTime

Name: SiTime SIT1602BC-71-28N-37.500000G
Brand: SiTime
SKU: SIT1602BC-71-28N-37.500000G
Price: 0.916 USD
Availability: InStock
Rating: 5 (2 reviews)

Manufacturer Part Number: SIT1602BC-71-28N-37.500000G

Manufacturer: SiTime

Allelco Part Number: 98D-SIT1602BC-71-28N-37.500000G

Warranty: 1 Year Allelco Warranty - Find out more

Stock Status:: 42,105 pcs available, New & Original

Parts Description: -20 TO 70C, 2016, 20PPM, 2.8V, 3

Package

Data sheet: SIT1602BC-71-28.pdf

Datasheets
SiT1602B.pdf

RoHs Status: Lead free / RoHS Compliant

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Specifications

SIT1602BC-71-28N-37.500000G Tech Specifications
SiTime - SIT1602BC-71-28N-37.500000G technical specifications, attributes, parameters and parts with similar specifications to SiTime - SIT1602BC-71-28N-37.500000G

Product Attribute	Attribute Value
Manufacturer	SiTime
Series	*
Packaging	Tape & Reel (TR)
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Product Attribute	Attribute Value
Manufacturer Standard Lead Time	8 Weeks
Lead Free Status / RoHS Status	Lead free / RoHS Compliant
Detailed Description	Oscillator

Environmental & Export Classifications

ATTRIBUTE	DESCRIPTION
RoHs Status	Lead free / RoHS Compliant

Frequently Asked Questions(FAQ)

What are the key electrical characteristics and operating conditions for the SIT1602BC-71-28N-37.500000G oscillator when used in industrial control systems?: The SIT1602BC-71-28N-37.500000G is a 37.5MHz programmable oscillator designed for stable clock generation in industrial environments. It operates within a supply voltage range of 2.8V, with a typical supply current draw of 4.5mA under full load. The device offers frequency stability of ±20ppm across an industrial temperature range from -20°C to +70°C, making it suitable for applications where environmental variability could otherwise impact timing accuracy. Its HCMOS/LVCMOS output type ensures compatibility with standard digital logic families commonly found in industrial automation equipment.

How does the SIT1602BC-71-28N-37.500000G compare to fixed-frequency crystal oscillators in terms of long-term reliability and tuning flexibility?: Unlike traditional crystal oscillators that have a fixed nominal frequency, the SIT1602BC-71-28N-37.500000G provides post-production frequency programming capability, allowing engineers to adjust the output without hardware changes. This flexibility reduces inventory complexity and enables last-minute design adjustments. In terms of reliability, SiTime’s MEMS-based design avoids the mechanical fragility associated with quartz crystals, offering enhanced resistance to shock and vibration—critical in industrial and automotive environments. However, its ±20ppm stability may be slightly less precise than high-end TCXOs or OCXOs, though sufficient for most microcontroller and communication interface applications.

Can the SIT1602BC-71-28N-37.500000G be used as a replacement for a 37.5MHz crystal oscillator in existing PCB designs, considering footprint and pinout constraints?: Yes, the SIT1602BC-71-28N-37.500000G is packaged in an SMD2016-4P footprint, which is mechanically and electrically compatible with many surface-mount crystal oscillator footprints. Engineers should verify that the layout accommodates the four-pin configuration and ensure proper decoupling near the VDD pin due to the 2.8V supply requirement. While the physical dimensions are similar to some common SMD crystals, designers must confirm signal routing and grounding match the oscillator’s input/output requirements to avoid degradation in phase noise or startup time.

What is the impact of operating temperature variation on the frequency accuracy of the SIT1602BC-71-28N-37.500000G, and how does this affect system-level timing budgets?: The SIT1602BC-71-28N-37.500000G maintains frequency stability within ±20ppm over the -20°C to +70°C range. At 37.5MHz, this equates to a maximum deviation of approximately ±7.5kHz. For applications like UART communications or SPI interfaces, such drift may introduce cumulative timing errors if not compensated. Systems requiring tighter synchronization, such as Ethernet PHYs or high-speed ADCs, may need additional calibration or use of higher-stability alternatives. However, for general-purpose microcontrollers and sensor networks, this level of stability is typically acceptable without external correction mechanisms.

Is it possible to reprogram the SIT1602BC-71-28N-37.500000G after deployment, and what tools or protocols are required to do so?: The SIT1602BC-71-28N-37.500000G supports in-system reconfiguration via SiTime’s proprietary programming interface, typically using I²C or SPI communication. After initial factory calibration, field updates can fine-tune the frequency to correct for manufacturing variations or environmental drift. Engineers must implement a host controller capable of accessing the oscillator’s internal registers and apply the appropriate command sequence. Documentation provided by SiTime includes register maps and timing diagrams essential for integration, but firmware overhead and security considerations should be evaluated before enabling remote updates.

How does the power consumption of the SIT1602BC-71-28N-37.500000G compare to other 37.5MHz oscillators in battery-powered embedded devices?: With a typical supply current of 4.5mA at 2.8V, the SIT1602BC-71-28N-37.500000G draws more power than ultra-low-power crystal oscillators (often <1mA), but less than some older CMOS-based IC oscillators. In energy-constrained applications, this trade-off favors reliability and programmability over efficiency. If battery life is critical, alternative low-power solutions like RC oscillators or fractional-N synthesizers might be preferable, though they sacrifice frequency precision. The choice depends on whether the application prioritizes timing accuracy, development agility, or power budget.

What precautions should be taken during PCB layout to minimize EMI and ensure reliable operation of the SIT1602BC-71-28N-37.500000G?: To reduce electromagnetic interference and maintain signal integrity, the SIT1602BC-71-28N-37.500000G should be placed away from noisy components such as switching regulators or high-current traces. A dedicated ground plane underneath the device helps suppress radiation, and short, direct connections between the oscillator pins and the IC’s clock input minimize parasitic inductance and capacitance. Decoupling capacitors (typically 100nF) must be placed as close as possible to the VDD pin to stabilize the 2.8V supply. Additionally, avoiding vias near the oscillator output path reduces impedance discontinuities that can degrade rise times and increase radiated emissions.

Can the SIT1602BC-71-28N-37.500000G operate reliably in high-vibration environments such as automotive powertrains or industrial motors?: Yes, the SIT1602BC-71-28N-37.500000G uses a MEMS-based architecture that inherently resists mechanical stress, unlike fragile quartz crystals. This makes it more robust against vibrations up to several thousand Gs—far exceeding those encountered in typical industrial or automotive settings. As a result, it maintains consistent frequency output and phase noise performance even in harsh mechanical environments. For safety-critical automotive applications beyond the specified commercial temperature range, further qualification testing would be required, but the device is generally preferred over traditional crystals in vibration-prone installations.

What is the significance of the "Programmable Oscillators" designation for the SIT1602BC-71-28N-37.500000G, and how does this benefit system debugging and production?: The programmable feature allows the SIT1602BC-71-28N-37.500000G to be calibrated during test or assembly to achieve exact frequency targets, compensating for process variations in both the oscillator itself and the host PCB. This simplifies yield management and eliminates the need for multiple fixed-frequency parts. During development, engineers can simulate different frequencies without hardware changes, accelerating bring-up. In volume production, final calibration ensures consistent timing performance across all units, reducing the risk of system-level failures due to marginal clock margins.

Does the SIT1602BC-71-28N-37.500000G support spread spectrum clocking or other jitter attenuation techniques for noise-sensitive applications?: Standard variants of the SIT1602BC-71-28N-37.500000G do not include built-in spread spectrum functionality. However, its low phase noise profile—typical of MEMS oscillators—helps minimize broadband jitter. For applications requiring controlled spectral spreading (e.g., to reduce EMI peaks), external PLLs or dedicated spread-spectrum clock generators may be integrated upstream. Alternatively, selecting a variant with spread spectrum options from SiTime’s broader product portfolio could provide native support, depending on system requirements and cost constraints.

How does the frequency tolerance of the SIT1602BC-71-28N-37.500000G compare to GPS-disciplined clocks or atomic references in terms of long-term accuracy?: The SIT1602BC-71-28N-37.500000G offers ±20ppm stability, which translates to a daily frequency error of about ±1.7 seconds per day. This is significantly less accurate than GPS-disciplined oscillators (>1e-9 daily drift) or atomic references (>1e-12), which are used in time servers and telecom infrastructure. However, for non-time-critical applications such as industrial sensors, microcontrollers, and consumer electronics, this level of accuracy suffices. Long-term precision is adequate unless absolute timekeeping or nanosecond-level synchronization is required.

Are there any known limitations or edge cases where the SIT1602BC-71-28N-37.500000G may exhibit unstable startup behavior or excessive phase noise?: Under normal operating conditions with proper power sequencing and decoupling, the SIT1602BC-71-28N-37.500000G demonstrates stable startup within a few milliseconds. Instability usually arises from poor layout practices, insufficient bypass capacitance, or rapid supply transients. Phase noise is generally better than equivalent crystal oscillators due to MEMS technology, but at very close-in offsets (<100Hz), minor flicker noise can appear depending on load capacitance matching. Designers should consult SiTime’s application notes for recommended load configurations and avoid loading the output with long cables or unmatched impedances.

What role does the SIT1602BC-71-28N-37.500000G play in enabling interoperability between legacy and modern digital subsystems during system upgrades?: The programmable nature of the SIT1602BC-71-28N-37.500000G allows flexible frequency translation between legacy components expecting fixed clocks (e.g., 37.5MHz peripherals) and newer subsystems requiring adjusted rates. This adaptability reduces redesign effort during platform migrations and supports mixed-signal architectures. For instance, a legacy ADC might require exactly 37.5MHz while a new FPGA needs a divided version; the oscillator can be reconfigured accordingly. Such flexibility streamlines integration and extends the lifespan of existing hardware assets.

How should thermal management strategies affect the selection and placement of the SIT1602BC-71-28N-37.500000G in compact, thermally constrained enclosures?: Although the SIT1602BC-71-28N-37.500000G itself does not generate significant heat, its 4.5mA quiescent current contributes to total power dissipation in dense PCBs. In sealed or high-ambient-temperature environments, cumulative heat from multiple ICs can elevate local temperatures, potentially pushing junction temperatures beyond safe limits and indirectly affecting long-term drift. Proper thermal vias, spacing, and airflow planning help maintain stable operating conditions. Since the device is rated up to +70°C ambient, thermal derating should consider worst-case enclosure temperatures rather than just component specs.

Can the SIT1602BC-71-28N-37.500000G be used in conjunction with phase-locked loops (PLLs) without introducing unacceptable jitter amplification?: When cascaded with a PLL, the SIT1602BC-71-28N-37.500000G provides a clean reference input provided its phase noise floor remains below the PLL’s loop bandwidth. At 37.5MHz, its intrinsic jitter is typically low enough to avoid degrading closed-loop performance unless the PLL has extremely narrow bandwidths or aggressive filtering. Designers should analyze the combined noise transfer function and ensure adequate margin between the oscillator’s Allan deviation and the PLL’s phase error accumulation. In most practical scenarios, the MEMS oscillator enhances overall system stability rather than degrading it.

What documentation and development resources are available from SiTime to support integration of the SIT1602BC-71-28N-37.500000G into custom firmware?: SiTime provides detailed datasheets, programming guides, register descriptions, and example code for the SIT1602BC-71-28N-37.500000G. These resources cover communication protocols (I²C/SPI), command sequences, and frequency resolution steps. Application notes address layout, calibration procedures, and troubleshooting tips. Developers can also access evaluation boards and configuration software tools that simplify initial setup and validation, reducing time-to-market for products incorporating this programmable oscillator.

Parts with Similar Specifications

The three parts on the right have similar specifications to SiTime SIT1602BC-71-28N-37.500000G

Product Attribute
Part Number	SIT1602BC-71-28N-37.500000E	SIT1602BC-71-28N-37.500000	SIT1602BC-71-28N-37.500000D	SIT1602BC-71-28N-38.400000G
Manufacturer	SiTime	SiTime	SiTime	SiTime
Moisture Sensitivity Level (MSL)	-	-	-	-
Lead Free Status / RoHS Status	-	-	-	-
Manufacturer Standard Lead Time	-	-	-	-
Series	-	-	-	-
Detailed Description	-	-	-	-
Packaging	-	-	-	-

SIT1602BC-71-28N-37.500000G Datasheet PDF

Download SIT1602BC-71-28N-37.500000G pdf datasheets and SiTime documentation for SIT1602BC-71-28N-37.500000G - SiTime.

Datasheets: SiT1602B.pdf

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Customer Reviews

Evaluation: 10 Articles

Dani***alkerTech

Jun 1, 2026

Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.
Yuki***aka88

May 26, 2026

信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。
Stev***aker

May 20, 2026

Solid diode for power rectification. Works well in switching circuits.
Bran***Lewis

May 11, 2026

Compact FPGA with good performance. Suitable for basic signal processing tasks.
Oliv***arris

May 7, 2026

Reliable I/O expander. Works well in embedded control applications.
Jess***Jones

Apr 17, 2026

It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.
Mich***Smith

Apr 17, 2026

Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.
Aman***arris

Apr 3, 2026

It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.
Mike***nch

Apr 3, 2026

Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.
Daic***K.

Mar 23, 2026

Very good. No issue after long time testing.

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America	Brazil	7
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