8Z24070010 24 MHz Crystal Equivalent & Substitute Parts

Part Overview

The 8Z24070010 is a 24 MHz fundamental mode quartz crystal manufactured by TXC CORPORATION, designed for surface mount applications in 4-SMD, No Lead package configuration. This active product operates across the industrial temperature range of -40°C to 85°C with ±30ppm frequency stability and 18pF load capacitance. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or design flexibility needs.

Key Parameters

Parameter	Value	Unit	Substitution Relevance
Frequency	24.0000	MHz	Critical - Must match exactly
Frequency Stability	±30	ppm	Critical - Determines timing accuracy
Load Capacitance	18	pF	Critical - Circuit design parameter
ESR (Equivalent Series Resistance)	100	Ohms	Important - Affects oscillator startup and power consumption
Operating Temperature Range	-40 to 85	°C	Critical - Application environment requirement
Package / Case	4-SMD, No Lead	-	Critical - PCB footprint compatibility
Mounting Type	Surface Mount	-	Critical - Assembly process compatibility
RoHS Status	RoHS Compliant	-	Important - Regulatory compliance
MSL (Moisture Sensitivity Level)	1 (Unlimited)	-	Important - Storage and handling requirements

Substitute Part Grouping Explanation

Substitute parts for the 8Z24070010 are classified based on strict electrical and mechanical parameter alignment:

Critical Matching Parameters:

Frequency: 24.0000 MHz (exact match required)
Frequency Stability: ±30ppm (tolerance specification)
Load Capacitance: 18pF (circuit design requirement)
Operating Temperature Range: -40°C to 85°C (application environment)
Package / Case: 4-SMD, No Lead (PCB footprint)
Mounting Type: Surface Mount (assembly compatibility)

Allowable Variation Parameters:

ESR (Equivalent Series Resistance): Substitutes may vary within acceptable oscillator design margins
Physical Dimensions: Minor variations permitted within 4-SMD, No Lead package envelope
Packaging Format: Cut Tape (CT) and Tape & Reel (TR) formats are interchangeable for component selection
RoHS Compliance Level: ROHS3 Compliant is equivalent to RoHS Compliant for regulatory purposes

All identified substitutes maintain identical frequency, stability, load capacitance, temperature range, and package specifications as the primary part.

Parameter Comparison

Parameter	8Z24070010 (TXC)	R2016-24.000-18-3030-EXT-TR (Raltron)	QT252S-24.000MAHJ-T (QST)
Manufacturer	TXC CORPORATION	Raltron Electronics	QST
Frequency	24.0000 MHz	24.0000 MHz	24.0000 MHz
Frequency Stability	±30ppm	±30ppm	±30ppm
Frequency Tolerance	±30ppm	±30ppm	±30ppm
Load Capacitance	18pF	18pF	18pF
ESR	100 Ohms	120 Ohms	100 Ohms
Operating Mode	Fundamental	Fundamental	Fundamental
Operating Temperature	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	4-SMD, No Lead	4-SMD, No Lead	4-SMD, No Lead
Size / Dimension	0.098" L x 0.079" W (2.50mm x 2.00mm)	0.079" L x 0.063" W (2.00mm x 1.60mm)	0.098" L x 0.079" W (2.50mm x 2.00mm)
Height - Seated (Max)	0.022" (0.55mm)	0.020" (0.50mm)	0.022" (0.55mm)
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active
HTSUS Code	8541.60.0060	8541.60.0060	8541.60.0060

Engineering Selection Recommendations

Primary Part: 8Z24070010 (TXC CORPORATION)

The 8Z24070010 maintains active product status with RoHS Compliant certification and unlimited moisture sensitivity level (MSL 1). This part is suitable for applications requiring the specified 24 MHz frequency with ±30ppm stability and 18pF load capacitance across the -40°C to 85°C operating range.

Substitute Option 1: R2016-24.000-18-3030-EXT-TR (Raltron Electronics)

The Raltron R2016 series substitute matches all critical electrical parameters: 24 MHz frequency, ±30ppm stability, 18pF load capacitance, and -40°C to 85°C temperature range. ESR specification is 120 Ohms compared to 100 Ohms in the primary part. Physical dimensions are smaller (2.00mm x 1.60mm versus 2.50mm x 2.00mm), which may require PCB layout verification for footprint compatibility. ROHS3 Compliant status is equivalent to RoHS Compliant for regulatory purposes. Packaging is provided in Cut Tape (CT) format.

Substitute Option 2: QT252S-24.000MAHJ-T (QST)

The QST QT252S series substitute provides parametric equivalence with identical frequency (24 MHz), stability (±30ppm), load capacitance (18pF), ESR (100 Ohms), and temperature range (-40°C to 85°C). Physical dimensions match the primary part exactly (2.50mm x 2.00mm). ROHS3 Compliant status meets regulatory requirements. Packaging is provided in Tape & Reel (TR) format.

Selection between substitutes depends on packaging format requirements (Cut Tape versus Tape & Reel), physical footprint constraints, and ESR tolerance specifications for the oscillator circuit design.

Frequently Asked Questions (FAQ)

Q: Can the R2016-24.000-18-3030-EXT-TR be used as a direct replacement for the 8Z24070010?

A: The R2016 substitute matches all critical electrical specifications: 24 MHz frequency, ±30ppm stability, 18pF load capacitance, and -40°C to 85°C operating temperature. The primary difference is physical size (2.00mm x 1.60mm versus 2.50mm x 2.00mm). PCB footprint compatibility must be verified before substitution. ESR is 120 Ohms versus 100 Ohms, which may affect oscillator circuit performance depending on design margins.

Q: What is the significance of the ESR difference between the primary part (100 Ohms) and the Raltron substitute (120 Ohms)?

A: ESR (Equivalent Series Resistance) affects crystal oscillator startup behavior and power consumption. The 20 Ohm difference represents a 20% increase. Oscillator circuits designed with adequate gain margin can typically accommodate this variation. Circuit simulation or testing is necessary to confirm compatibility with specific oscillator designs.

Q: Are ROHS3 Compliant and RoHS Compliant equivalent for component selection?

A: ROHS3 Compliant represents the current RoHS Directive 2011/65/EU standard, while RoHS Compliant typically refers to the original 2002/95/EC directive. Both certifications indicate lead-free and restricted substance compliance. ROHS3 Compliant parts are acceptable substitutes in applications requiring RoHS Compliant components.

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

A: Cut Tape (CT) packaging provides components on carrier tape in smaller quantities, suitable for manual assembly or small production runs. Tape & Reel (TR) packaging provides components on continuous reel format, optimized for automated pick-and-place assembly equipment. Both formats contain identical components; selection depends on assembly process requirements.

Q: Can the QT252S-24.000MAHJ-T be used interchangeably with the 8Z24070010?

A: Yes. The QT252S substitute provides parametric equivalence across all critical specifications: 24 MHz frequency, ±30ppm stability, 18pF load capacitance, 100 Ohms ESR, and -40°C to 85°C operating temperature. Physical dimensions are identical (2.50mm x 2.00mm). The primary difference is packaging format (Tape & Reel versus standard packaging). No circuit modifications are required.

Q: What parameters must remain identical when selecting a substitute crystal?

A: The following parameters must match exactly: frequency (24.0000 MHz), frequency stability (±30ppm), load capacitance (18pF), operating temperature range (-40°C to 85°C), package type (4-SMD, No Lead), and mounting type (Surface Mount). Variations in ESR, physical dimensions within package envelope, and packaging format are permissible within design constraints.

Q: Is MSL 1 (Unlimited) the same across all three parts?

A: Yes. All three parts specify MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Components can be stored and handled without special moisture control measures, simplifying inventory management and assembly processes.

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