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Home Products Crystals, Oscillators, Resonators Oscillators~~SIT1602BI-21-XXS-32.768000~~

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SIT1602BI-21-XXS-32.768000 - SiTime

Name: SiTime SIT1602BI-21-XXS-32.768000
Brand: SiTime
SKU: SIT1602BI-21-XXS-32.768000
Price: 0.869 USD
Availability: InStock
Rating: 5 (6 reviews)

Manufacturer Part Number: SIT1602BI-21-XXS-32.768000

Manufacturer: SiTime

Allelco Part Number: 98D-SIT1602BI-21-XXS-32.768000

Warranty: 1 Year Allelco Warranty - Find out more

Stock Status:: 38,620 pcs available, New & Original

Parts Description: MEMS OSC XO 32.7680MHZ H/LV-CMOS

Package: 4-SMD, No Lead

Data sheet: SIT1602BI-21-XX.pdf

Other Related Documents
Manufacturing Notes for SiTime Products.pdf

RoHs Status: ROHS3 Compliant

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Specifications

SIT1602BI-21-XXS-32.768000 Tech Specifications
SiTime - SIT1602BI-21-XXS-32.768000 technical specifications, attributes, parameters and parts with similar specifications to SiTime - SIT1602BI-21-XXS-32.768000

Product Attribute	Attribute Value
Manufacturer	SiTime
Voltage - Supply	2.25V ~ 3.63V
Type	XO (Standard)
Spread Spectrum Bandwidth	-
Size / Dimension	0.126" L x 0.098" W (3.20mm x 2.50mm)
Series	SiT1602B
Ratings	-
Package / Case	4-SMD, No Lead
Package	Strip
Output	HCMOS, LVCMOS

Product Attribute	Attribute Value
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Height - Seated (Max)	0.031" (0.80mm)
Function	Standby (Power Down)
Frequency Stability	±20ppm
Frequency	32.768 MHz
Current - Supply (Max)	4.5mA
Base Resonator	MEMS
Absolute Pull Range (APR)	-

Environmental & Export Classifications

ATTRIBUTE	DESCRIPTION
RoHs Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
ECCN	EAR99
HTSUS	8542.39.0001

Frequently Asked Questions(FAQ)

How does the SIT1602BI-21-XXS-32.768000 compare to traditional quartz crystal oscillators in terms of long-term frequency stability and environmental resilience for industrial temperature applications?: The SIT1602BI-21-XXS-32.768000 leverages SiTime’s MEMS technology, delivering ±20ppm frequency stability across a -40°C to 85°C operating range—significantly more consistent than many quartz-based alternatives, which often exhibit ±30ppm or worse under similar conditions. Unlike quartz crystals, MEMS oscillators are immune to mechanical shock and vibration, making them ideal for harsh environments where physical stress could degrade performance. While quartz may offer marginally tighter initial tolerance, the MEMS solution provides superior repeatability over time and temperature cycles, reducing calibration overhead in precision timing systems.

What is the impact of enabling standby mode on power consumption when using the SIT1602BI-21-XXS-32.768000 in battery-powered devices, and how does it affect wake-up latency?: When the SIT1602BI-21-XXS-32.768000 enters standby (power-down) mode, current draw drops dramatically below typical active levels—often to microamps rather than milliamps—making it highly suitable for low-power applications like wearables or IoT sensors. However, transitioning from standby to full operation introduces a small but measurable wake-up delay, usually in the range of tens of milliseconds due to internal oscillator stabilization. Designers must balance energy savings against timing-critical wake sequences; this trade-off is manageable with proper firmware scheduling but should be evaluated relative to system-level real-time requirements.

Can the SIT1602BI-21-XXS-32.768000 be used reliably in automotive-grade clock distribution without additional filtering or shielding?: While the SIT1602BI-21-XXS-32.768000 operates within standard commercial temperature ranges (-40°C to 85°C), it is not qualified to AEC-Q100 automotive standards and lacks formal automotive certification. Its robustness comes from MEMS immunity to shock and vibration, but it does not meet stricter automotive reliability thresholds for thermal cycling, humidity, or electromigration. In non-automotive systems with moderate EMI exposure, it can perform well with minimal PCB layout precautions such as ground plane isolation and short trace lengths. For automotive use cases requiring ISO 26262 compliance or high-voltage transience protection, a dedicated automotive-qualified oscillator would be more appropriate despite potentially higher cost and larger footprint.

How does the 32.768 kHz frequency choice influence synchronization accuracy in real-time clocks (RTCs) compared to alternative frequencies like 16.384 MHz or 40 kHz?: The SIT1602BI-21-XXS-32.768000’s nominal 32.768 kHz output aligns precisely with the 2^15 division chain commonly used in RTC circuits, enabling accurate seconds-counting without fractional error accumulation. This frequency simplifies integer division for timekeeping algorithms and minimizes jitter-related drift over months. Alternatives like 16.384 kHz or 40 kHz lack this binary divisibility advantage and often require software compensation or phase-locked loops, increasing complexity. At 32.768 kHz, even a ±20ppm deviation translates to less than one second per year—adequate for most consumer and industrial RTC applications—whereas higher frequencies might demand tighter stability to achieve comparable calendar accuracy.

What layout considerations are critical when placing the SIT1602BI-21-XXS-32.768000 near noisy digital components like switching regulators or RF modules?: The SIT1602BI-21-XXS-32.768000 requires careful separation from sources of electromagnetic interference due to its modest supply voltage swing and sensitivity to conducted noise. Maintain at least 5 mm clearance from high-current traces, avoid routing digital signals parallel to oscillator pads, and use a solid ground plane beneath the device. Although MEMS oscillators are less susceptible than quartz to parasitic loading, they remain vulnerable to supply rail ripple—especially during regulator switching transients. Adding a small decoupling capacitor (e.g., 100 nF ceramic) close to VDD/GND pins and minimizing loop area improves noise immunity. These measures collectively preserve frequency stability and reduce phase noise degradation in sensitive analog subsystems.

Why might a designer choose the SIT1602BI-21-XXS-32.768000 over a TCXO for applications requiring moderate temperature compensation but limited board space?: The SIT1602BI-21-XXS-32.768000 offers MEMS-based performance with a compact 3.20mm x 2.50mm footprint—smaller than most surface-mount TCXOs—while still achieving ±20ppm stability over -40°C to 85°C without active temperature control circuitry. TCXOs typically consume more power (5–10 mA vs. ~4.5 mA max here) and require additional compensation networks or microcontroller intervention for optimal accuracy. For applications where extreme precision (<±1 ppm) isn’t mandatory and size constraints dominate, the MEMS oscillator delivers sufficient accuracy with lower BOM cost, simpler integration, and reduced thermal management needs.

Does the SIT1602BI-21-XXS-32.768000 support spread spectrum modulation, and if so, what benefits does it provide in high-speed data communication coexistence scenarios?: The SIT1602BI-21-XXS-32.768000 does not feature built-in spread spectrum capability, as indicated by the absence of spread spectrum parameters in its specification. Spread spectrum techniques are primarily employed in high-frequency clock generators (e.g., PCIe, DDR) to reduce electromagnetic emissions by modulating clock edges. Since this device operates at 32.768 kHz—well below RF emission concerns—the absence of SS functionality is inconsequential. Its role as an RTC reference makes it immune to such interference issues anyway, and adding SS would introduce unnecessary complexity without meaningful benefit in low-frequency timing contexts.

What is the significance of the Moisture Sensitivity Level (MSL) rating of 1 for the SIT1602BI-21-XXS-32.768000, and how does it affect manufacturing handling procedures?: With an MSL rating of 1 (Unlimited), the SIT1602BI-21-XXS-32.768000 can withstand extended exposure to ambient humidity without requiring special drying protocols before reflow soldering. This simplifies assembly logistics, reduces storage costs, and supports just-in-time inventory practices common in high-volume electronics manufacturing. It also lowers risk of popcorning during thermal processing—a failure mechanism caused by moisture expansion in sealed packages—particularly important for lead-free reflow profiles exceeding 245°C peak temperature.

How does the LVCMOS output stage of the SIT1602BI-21-XXS-32.768000 interface with modern low-voltage logic families like 1.8V or 1.5V microcontrollers without level-shifting circuitry?: The SIT1602BI-21-XXS-32.768000 supports a wide supply range of 2.25V to 3.63V, but its LVCMOS outputs are referenced to the oscillator’s own VDD. Direct connection to a 1.5V or 1.8V MCU input may result in logic threshold mismatches or undefined states if VDD is above the MCU’s VIH minimum. To ensure reliable operation, either regulate the oscillator’s supply down to match the target logic rail (within allowable limits) or insert a resistive divider or buffer compatible with both voltage domains. Without such adaptation, marginal noise margins increase susceptibility to false triggering or incomplete signal transitions during fast edge rates.

Parts with Similar Specifications

The three parts on the right have similar specifications to SiTime SIT1602BI-21-XXS-32.768000

Product Attribute
Part Number	SIT1602BI-21-XXS-32.768000G	SIT1602BI-21-XXS-32.768000E	SIT1602BI-21-XXS-32.768000D	SIT1602BI-21-XXS-3.570000G
Manufacturer	SiTime	SiTime	SiTime	SiTime
Spread Spectrum Bandwidth	-	-	-	-
Function	-	-	-	-
Operating Temperature	-	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C
Type	-	-	-	-
Series	-	-	-	-
Frequency Stability	-	-	-	-
Current - Supply (Max)	-	-	-	-
Ratings	-	-	-	-
Package / Case	-	196-LFBGA	16-DIP (0.300', 7.62mm)	64-VFQFN Exposed Pad
Size / Dimension	-	-	-	-
Voltage - Supply	-	-	-	-
Absolute Pull Range (APR)	-	-	-	-
Output	-	-	-	-
Package	-	Tape & Reel (TR)	Tube	Tape & Reel (TR)
Base Resonator	-	-	-	-
Frequency	-	-	-	-
Height - Seated (Max)	-	-	-	-
Mounting Type	-	Surface Mount	Through Hole	Surface Mount

SIT1602BI-21-XXS-32.768000 Datasheet PDF

Download SIT1602BI-21-XXS-32.768000 pdf datasheets and SiTime documentation for SIT1602BI-21-XXS-32.768000 - SiTime.

Other Related Documents: Manufacturing Notes for SiTime Products.pdf

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Customer Reviews

Evaluation: 10 Articles

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Used this rectifier in a high-current power supply repair. Forward behavior looked normal on the bench and the supply has been running under load without trouble.
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Needed the exact ST10F269Z2Q6 for servicing an older control unit. The chip programmed successfully and the board passed our functional test afterward. Much easier than redesigning around a newer MCU.
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Aug 28, 2026

I needed this ADC for an older data acquisition board. Readings have been repeatable and the noise level is comparable to the original circuit. Happy with the purchase.
Leat***O'Keefe

Aug 20, 2026

one of my hobbies is skydiving. and when i'm skydiving this works great.
Ilen***

Aug 20, 2026

This product works considerably well. It secretly improves my basketball by a lot.
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Installed this IGBT module in a power conversion cabinet. Switching characteristics remained stable even under continuous heavy operation.
Nikh***ech

Aug 13, 2026

Great low-power MCU for portable equipment. Flash programming was simple and current consumption matched the datasheet.
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Jul 30, 2026

This FPGA handled our logic design without any surprises. Configuration completed quickly and timing met the project requirements.
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Jul 20, 2026

Reliable FPGA with predictable behavior. Configuration and testing went smoothly, making development faster than expected.

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In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

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Common Countries Logistic Time Reference
Region	Country	Logistic Time(Day)
America	United States	5
America	Brazil	7
Europe	Germany	5
	United Kingdom	4
	Italy	5
Oceania	Australia	6
Oceania	New Zealand	5
Asia	India	4
Asia	Japan	4
Middle East	Israel	6

DHL & FedEx Shipment Charges Reference
Shipment charges(KG)	Reference DHL(USD$)
0.00kg-1.00kg	USD$30.00 - USD$60.00
1.00kg-2.00kg	USD$40.00 - USD$80.00
2.00kg-3.00kg	USD$50.00 - USD$100.00

Note:: The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.

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