LFXTAL066834 Equivalent & Substitute Parts

Part Overview

The LFXTAL066834 is a 32.768 kHz tuning fork crystal manufactured by IQD Frequency Products, designed for surface mount applications in timing and frequency control circuits. This component operates at a fundamental frequency of 32.768 kHz with a load capacitance of 12.5pF and an equivalent series resistance of 50 kOhms. The part is RoHS3 compliant and rated for operation across the temperature range of -40°C to 85°C. As an active product with established market availability, substitute components are identified to provide design flexibility, accommodate supply chain variations, and support alternative sourcing strategies while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Frequency	32.768	kHz
Frequency Tolerance	±10	ppm
Load Capacitance	12.5	pF
Equivalent Series Resistance (ESR)	50	kOhms
Operating Mode	Fundamental	—
Operating Temperature Range	-40 to 85	°C
Mounting Type	Surface Mount	—
Package Type	2-SMD, No Lead	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the LFXTAL066834 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Frequency: 32.768 kHz (exact match required)
Frequency Tolerance: ±10ppm (exact match required)
Load Capacitance: 12.5pF (exact match required)
Operating Temperature Range: -40°C to 85°C (exact match required)
Mounting Type: Surface Mount (exact match required)
Package Type: 2-SMD, No Lead (exact match required)

Secondary Compatibility Factors:

Equivalent Series Resistance (ESR): Variations permitted within circuit design margins
Physical Dimensions: Variations permitted provided footprint compatibility is maintained
RoHS Compliance: ROHS3 or equivalent compliance required

Substitute parts are grouped into two categories based on load capacitance specification: parts with 12.5pF load capacitance (direct electrical equivalents) and parts with 9pF load capacitance (alternative load capacitance requiring circuit design verification). Parts with 9pF load capacitance are included as substitutes only when circuit design accommodates alternative load capacitance values.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Frequency (kHz)	Frequency Tolerance (ppm)	Load Capacitance (pF)	ESR (kOhms)	Operating Temperature (°C)	Package Type	Size (mm)	RoHS Status
LFXTAL066834	IQD Frequency Products	32.768	±10	12.5	50	-40 to 85	2-SMD, No Lead	3.20 x 1.50	ROHS3
LFXTAL062558	IQD Frequency Products	32.768	±10	9	90	-40 to 85	2-SMD, No Lead	2.00 x 1.20	ROHS3
9HT10-32.768KEZF-T	TXC CORPORATION	32.768	±10	12.5	70	-40 to 85	2-SMD, No Lead	3.20 x 1.50	RoHS Compliant
ABS06-32.768KHZ-1-T	Abracon LLC	32.768	±10	12.5	90	-40 to 85	2-SMD, No Lead	2.00 x 1.20	ROHS3
ABS06-32.768KHZ-9-1-T	Abracon LLC	32.768	±10	9	90	-40 to 85	2-SMD, No Lead	2.00 x 1.20	ROHS3
ABS07-32.768KHZ-1-T	Abracon LLC	32.768	±10	12.5	70	-40 to 85	2-SMD, No Lead	3.20 x 1.50	ROHS3
ABS07-32.768KHZ-9-1-T	Abracon LLC	32.768	±10	9	70	-40 to 85	2-SMD, No Lead	3.20 x 1.50	ROHS3
ABS09-32.768KHZ-1-T	Abracon LLC	32.768	±10	12.5	70	-40 to 85	2-SMD, No Lead	4.10 x 1.50	ROHS3
CM315D32768EZFT	Citizen Finedevice Co Ltd	32.768	±10	12.5	70	-40 to 85	2-SMD, No Lead	3.20 x 1.50	ROHS3
CM41532768EZFT	Citizen Finedevice Co Ltd	32.768	±10	12.5	70	-40 to 85	2-SMD, No Lead	4.10 x 1.50	ROHS3
CM7V-T1A-32.768KHZ-9PF-10PPM-TA-QC	Micro Crystal AG	32.768	±10	9	70	-40 to 85	2-SMD, No Lead	3.20 x 1.50	ROHS3

Engineering Selection Recommendations

Direct Electrical Equivalents (12.5pF Load Capacitance):

The following parts provide direct electrical substitution with identical load capacitance specification:

9HT10-32.768KEZF-T (TXC CORPORATION): Matches all primary electrical parameters with 12.5pF load capacitance. ESR of 70 kOhms is higher than the main part (50 kOhms) but remains within acceptable circuit design margins. RoHS compliant. Identical package footprint (3.20mm x 1.50mm).
ABS07-32.768KHZ-1-T (Abracon LLC): Provides 12.5pF load capacitance with 70 kOhms ESR. ROHS3 compliant. Identical package footprint (3.20mm x 1.50mm). Active product status with established inventory.
CM315D32768EZFT (Citizen Finedevice Co Ltd): Delivers 12.5pF load capacitance with 70 kOhms ESR. ROHS3 compliant. Identical package footprint (3.20mm x 1.50mm).

Alternative Load Capacitance Options (9pF Load Capacitance):

The following parts provide substitution with alternative 9pF load capacitance specification. These parts are suitable only when circuit design accommodates 9pF load capacitance:

LFXTAL062558 (IQD Frequency Products): Same manufacturer as main part. 9pF load capacitance with 90 kOhms ESR. ROHS3 compliant. Smaller package footprint (2.00mm x 1.20mm).
ABS06-32.768KHZ-9-1-T (Abracon LLC): 9pF load capacitance with 90 kOhms ESR. ROHS3 compliant. Smaller package footprint (2.00mm x 1.20mm).
CM7V-T1A-32.768KHZ-9PF-10PPM-TA-QC (Micro Crystal AG): 9pF load capacitance with 70 kOhms ESR. ROHS3 compliant. Maintains 3.20mm x 1.50mm package footprint.

Larger Package Alternatives (12.5pF Load Capacitance):

ABS09-32.768KHZ-1-T (Abracon LLC): 12.5pF load capacitance with 70 kOhms ESR. ROHS3 compliant. Larger package footprint (4.10mm x 1.50mm) suitable for applications with relaxed space constraints.
CM41532768EZFT (Citizen Finedevice Co Ltd): 12.5pF load capacitance with 70 kOhms ESR. ROHS3 compliant. Larger package footprint (4.10mm x 1.50mm).

All substitute parts maintain active product status and are RoHS compliant. Selection should be based on circuit design requirements for load capacitance, available board space for package footprint, and ESR tolerance specifications.

Frequently Asked Questions (FAQ)

Q: Can I substitute the LFXTAL066834 with a part having 9pF load capacitance?

A: Substitution with 9pF load capacitance parts is possible only if your circuit design accommodates this alternative load capacitance value. The main part specifies 12.5pF load capacitance. Parts such as LFXTAL062558, ABS06-32.768KHZ-9-1-T, and CM7V-T1A-32.768KHZ-9PF-10PPM-TA-QC provide 9pF load capacitance. Circuit verification is required to confirm compatibility.

Q: What is the significance of ESR (Equivalent Series Resistance) differences?

A: The main part LFXTAL066834 specifies 50 kOhms ESR. Most substitute parts have ESR values of 70 kOhms or 90 kOhms. ESR affects circuit startup characteristics and oscillation amplitude. Higher ESR values may require circuit design adjustments. Verify that your oscillator circuit design accommodates the ESR specification of the selected substitute part.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts listed are either ROHS3 compliant or RoHS compliant. The main part LFXTAL066834 is ROHS3 compliant. Compliance status is maintained across all substitute options.

Q: What are the package footprint differences, and do they affect PCB layout?

A: The main part uses a 3.20mm x 1.50mm package footprint. Some substitutes use smaller 2.00mm x 1.20mm footprints (LFXTAL062558, ABS06 series), while others use larger 4.10mm x 1.50mm footprints (ABS09-32.768KHZ-1-T, CM41532768EZFT). Smaller packages require tighter PCB layout tolerances. Larger packages provide more robust mechanical mounting. Verify that your PCB layout accommodates the selected substitute's physical dimensions.

Q: Can I use 9HT10-32.768KEZF-T as a direct replacement?

A: Yes. The 9HT10-32.768KEZF-T provides direct electrical substitution with identical 12.5pF load capacitance, matching frequency, frequency tolerance, and operating temperature range. The ESR is 70 kOhms compared to the main part's 50 kOhms. Package footprint is identical (3.20mm x 1.50mm). Verify that your oscillator circuit design accommodates the higher ESR value.

Q: Which substitute offers the closest electrical match to the LFXTAL066834?

A: The 9HT10-32.768KEZF-T from TXC CORPORATION provides the closest electrical match with identical 12.5pF load capacitance and matching package footprint. The primary difference is ESR (70 kOhms versus 50 kOhms). The ABS07-32.768KHZ-1-T and CM315D32768EZFT also provide identical load capacitance with 70 kOhms ESR and matching package footprint.

Q: Are there inventory considerations when selecting a substitute?

A: Inventory levels vary significantly among substitute parts. The main part LFXTAL066834 has 3,921 pieces in stock. Substitute parts with higher inventory include ABS06-32.768KHZ-1-T (519,714 pieces) and ABS06-32.768KHZ-9-1-T (249,552 pieces). Lower inventory parts include CM41532768EZFT (997 pieces) and CM7V-T1A-32.768KHZ-9PF-10PPM-TA-QC (911 pieces). Verify current availability for your procurement timeline.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® packaging?

A: Tape & Reel (TR) packaging is standard for high-volume automated assembly. Cut Tape (CT) & Digi-Reel® packaging provides flexibility for lower-volume or mixed-component orders. Both packaging formats are suitable for surface mount assembly. Select based on your production volume and assembly process requirements.

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