LFXTAL072844 30 MHz Crystal Equivalent & Substitute Parts

Part Overview

The LFXTAL072844 is a 30 MHz fundamental mode quartz crystal manufactured by IQD Frequency Products, designed for surface mount applications in the CFPX-218 series. This active product operates across -20°C to 70°C with ±10ppm frequency stability and 10pF load capacitance. Substitute parts are identified when frequency, stability, load capacitance, operating temperature range, and package type remain equivalent or compatible with circuit design requirements.

Key Parameters

Parameter	Value
Frequency	30 MHz
Frequency Stability	±10ppm
Load Capacitance	10pF
ESR (Equivalent Series Resistance)	70 Ohms
Operating Temperature Range	-20°C to 70°C
Mounting Type	Surface Mount
Package / Case	4-SMD, No Lead
Operating Mode	Fundamental
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Primary Equivalence (Direct Substitutes): Parts maintaining identical frequency (30 MHz), frequency stability (±10ppm), load capacitance (10pF), operating temperature range (-20°C to 70°C), and 4-SMD package configuration.

Secondary Compatibility (Load Capacitance Variants): Parts with 30 MHz frequency, ±10ppm stability, and matching temperature range but differing load capacitance (7pF or 8pF) and ESR values. These require circuit design verification for oscillator tank impedance matching.

Tertiary Compatibility (Dimensional Variants): Parts meeting all electrical parameters but with different physical dimensions or ESR specifications within the 4-SMD, No Lead package family.

All substitute parts maintain ROHS3 compliance, fundamental operating mode, and surface mount configuration.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Frequency	Frequency Stability	Load Capacitance	ESR (Ohms)	Operating Temperature	Package	Size (mm)	Height Max (mm)	RoHS Status
LFXTAL072844	IQD Frequency Products	30 MHz	±10ppm	10pF	70	-20°C to 70°C	4-SMD, No Lead	2.50 x 2.00	0.60	ROHS3
402F30011CAR	CTS-Frequency Controls	30 MHz	±10ppm	10pF	80	-20°C to 70°C	4-SMD, No Lead	2.00 x 1.60	0.55	ROHS3
8Y-30.000MEEQ-T	TXC CORPORATION	30 MHz	±10ppm	10pF	80	-20°C to 70°C	4-SMD, No Lead	2.00 x 1.60	0.55	RoHS Compliant
ABM10W-30.0000MHZ-8-B1U-T3	Abracon LLC	30 MHz	±10ppm	8pF	40	-20°C to 70°C	4-SMD, No Lead	2.50 x 2.00	0.60	ROHS3
ABM11-30.000MHZ-B1U-T	Abracon LLC	30 MHz	±10ppm	10pF	80	-20°C to 70°C	4-SMD, No Lead	2.00 x 1.60	0.59	ROHS3
ABM11W-30.0000MHZ-7-B1U-T3	Abracon LLC	30 MHz	±10ppm	7pF	50	-20°C to 70°C	4-SMD, No Lead	2.00 x 1.60	0.50	ROHS3
ABM12W-30.0000MHZ-7-B1U-T3	Abracon LLC	30 MHz	±10ppm	7pF	100	-20°C to 70°C	4-SMD, No Lead	1.60 x 1.20	0.40	ROHS3
ABM12W-30.0000MHZ-8-B1U-T3	Abracon LLC	30 MHz	±10ppm	8pF	100	-20°C to 70°C	4-SMD, No Lead	1.60 x 1.20	0.40	ROHS3
ECS-300-10-37-CKM-TR	ECS Inc.	30 MHz	±10ppm	10pF	60	-20°C to 70°C	4-SMD, No Lead	2.00 x 1.60	0.55	ROHS3
ECS-300-8-37-CKM-TR	ECS Inc.	30 MHz	±10ppm	8pF	60	-20°C to 70°C	4-SMD, No Lead	2.00 x 1.60	0.55	ROHS3
830107284409	Würth Elektronik	30 MHz	±10ppm	10pF	70	-20°C to 70°C	4-SMD, No Lead	2.50 x 2.00	0.60	ROHS3

Engineering Selection Recommendations

Direct Substitutes (Identical Electrical and Mechanical Parameters):

830107284409 (Würth Elektronik) is a parametric equivalent with matching 30 MHz frequency, ±10ppm stability, 10pF load capacitance, 70 Ohms ESR, and identical 2.50mm x 2.00mm dimensions. Both parts are ROHS3 compliant and active products.

Primary Substitutes (10pF Load Capacitance, Varying ESR):

402F30011CAR (CTS-Frequency Controls), 8Y-30.000MEEQ-T (TXC CORPORATION), ABM11-30.000MHZ-B1U-T (Abracon LLC), and ECS-300-10-37-CKM-TR (ECS Inc.) maintain 10pF load capacitance and ±10ppm stability across the -20°C to 70°C operating range. ESR values range from 60 to 80 Ohms. All are ROHS3 compliant active products. Physical dimensions vary between 2.00mm x 1.60mm and 2.50mm x 2.00mm footprints.

Secondary Substitutes (Reduced Load Capacitance):

ABM10W-30.0000MHZ-8-B1U-T3 (8pF, 40 Ohms ESR), ABM11W-30.0000MHZ-7-B1U-T3 (7pF, 50 Ohms ESR), ABM12W-30.0000MHZ-7-B1U-T3 (7pF, 100 Ohms ESR), ABM12W-30.0000MHZ-8-B1U-T3 (8pF, 100 Ohms ESR), and ECS-300-8-37-CKM-TR (8pF, 60 Ohms ESR) provide alternative load capacitance values. These require verification of oscillator circuit tank impedance compatibility. All maintain 30 MHz frequency, ±10ppm stability, and -20°C to 70°C operating range with ROHS3 compliance.

All substitute parts are active products with ROHS3 compliance and REACH unaffected status.

Frequently Asked Questions (FAQ)

Q: Can I substitute the LFXTAL072844 with a part having different load capacitance?

A: Load capacitance affects oscillator tank impedance matching. Parts with 8pF or 7pF load capacitance (ABM10W, ABM11W, ABM12W, ECS-300-8-37-CKM-TR series) require circuit design verification to ensure proper oscillation frequency and startup characteristics. Direct substitution is not guaranteed without circuit analysis.

Q: What is the significance of ESR differences among substitute parts?

A: ESR (Equivalent Series Resistance) ranges from 40 to 100 Ohms across available substitutes. Lower ESR (40-60 Ohms) reduces power consumption and improves startup margin. Higher ESR (80-100 Ohms) may require stronger oscillator drive circuits. Selection depends on oscillator design specifications.

Q: Are all substitute parts pin-compatible?

A: All listed substitutes use 4-SMD, No Lead package configuration. Physical footprints vary between 2.50mm x 2.00mm and 1.60mm x 1.20mm dimensions. PCB layout verification is required before substitution to confirm pad alignment and clearance.

Q: Which substitute offers the closest electrical match to LFXTAL072844?

A: 830107284409 (Würth Elektronik) provides parametric equivalence with identical 30 MHz frequency, ±10ppm stability, 10pF load capacitance, and 70 Ohms ESR. Physical dimensions and ROHS3 compliance also match exactly.

Q: Do all substitutes meet the same compliance requirements?

A: All listed parts are ROHS3 compliant and REACH unaffected. Moisture Sensitivity Level (MSL) varies: LFXTAL072844 and CTS/TXC/ECS parts specify MSL 1 (Unlimited), while Abracon and Würth parts specify Not Applicable. Verify MSL requirements for your assembly process.

Q: Can I use ABM12W series parts as direct replacements?

A: ABM12W series parts feature reduced physical dimensions (1.60mm x 1.20mm) and higher ESR (100 Ohms) with 7pF or 8pF load capacitance. These are not direct replacements for LFXTAL072844 (10pF, 70 Ohms, 2.50mm x 2.00mm). Circuit compatibility and PCB layout changes are required.

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