8Z-16.000MEEV-T Equivalent & Substitute Parts

Part Overview

The 8Z-16.000MEEV-T is a 16 MHz fundamental mode quartz crystal manufactured by TXC CORPORATION. This surface mount crystal is designed for applications requiring precise frequency generation with tight stability specifications. The device features a 2.5mm x 2.0mm package footprint with 4-SMD, No Lead configuration, making it suitable for compact electronic assemblies. The part is currently in Active product status with 742 pieces available in inventory. Substitute parts are identified when equivalent electrical and mechanical parameters are required due to supply constraints, design flexibility, or manufacturing preferences while maintaining full functional compatibility.

Key Parameters

Parameter	Value	Unit
Frequency	16	MHz
Frequency Stability	±10	ppm
Frequency Tolerance	±10	ppm
Load Capacitance	8	pF
ESR (Equivalent Series Resistance)	100	Ohms
Operating Mode	Fundamental	—
Operating Temperature Range	-20 to 70	°C
Mounting Type	Surface Mount	—
Package / Case	4-SMD, No Lead	—
Size / Dimension	2.50 x 2.00	mm
Height - Seated (Max)	0.55	mm
Packaging Type	Tape & Reel (TR)	—

Substitute Part Grouping Explanation

Substitution of the 8Z-16.000MEEV-T with the QT252S-16.000MEEV-T is based on strict equivalence of the following critical parameters:

Electrical Parameters (Must Match Exactly):

Frequency: 16 MHz
Frequency Stability: ±10 ppm
Frequency Tolerance: ±10 ppm
Load Capacitance: 8 pF
ESR: 100 Ohms
Operating Mode: Fundamental

Mechanical Parameters (Must Match Exactly):

Mounting Type: Surface Mount
Package / Case: 4-SMD, No Lead
Physical Dimensions: 2.50mm L x 2.00mm W
Height - Seated (Max): 0.55mm

Environmental Parameters (Must Match Exactly):

Operating Temperature Range: -20°C to 70°C

The QT252S-16.000MEEV-T meets all specified electrical, mechanical, and environmental requirements, establishing it as a parametric equivalent for direct substitution in applications utilizing the 8Z-16.000MEEV-T.

Parameter Comparison

Parameter	8Z-16.000MEEV-T (TXC)	QT252S-16.000MEEV-T (QST)	Match Status
Frequency	16 MHz	16 MHz	Identical
Frequency Stability	±10 ppm	±10 ppm	Identical
Frequency Tolerance	±10 ppm	±10 ppm	Identical
Load Capacitance	8 pF	8 pF	Identical
ESR	100 Ohms	100 Ohms	Identical
Operating Mode	Fundamental	Fundamental	Identical
Operating Temperature	-20°C to 70°C	-20°C to 70°C	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
Package / Case	4-SMD, No Lead	4-SMD, No Lead	Identical
Size / Dimension	2.50mm x 2.00mm	2.50mm x 2.00mm	Identical
Height - Seated (Max)	0.55mm	0.55mm	Identical
Packaging	Tape & Reel (TR)	Tape & Reel (TR)	Identical
Product Status	Active	Active	Identical

Engineering Selection Recommendations

Both the 8Z-16.000MEEV-T and QT252S-16.000MEEV-T are Active status products suitable for production applications. The QT252S-16.000MEEV-T offers higher inventory availability (3867 pieces versus 742 pieces) and includes RoHS3 compliance certification with MSL 1 (Unlimited) moisture sensitivity rating. Selection between these parts should be based on supply chain requirements, inventory levels, and compliance certifications applicable to the end application. Both parts are electrically and mechanically interchangeable within the specified operating parameters.

Frequently Asked Questions (FAQ)

Q: Can the QT252S-16.000MEEV-T be used as a direct replacement for the 8Z-16.000MEEV-T?

A: Yes. The QT252S-16.000MEEV-T is a parametric equivalent with identical electrical specifications (16 MHz, ±10 ppm stability, 8 pF load capacitance, 100 Ohms ESR), mechanical configuration (4-SMD, No Lead, 2.50mm x 2.00mm), and operating temperature range (-20°C to 70°C). Direct substitution is supported without circuit modification.

Q: Are there any differences in package dimensions between these parts?

A: No. Both parts share identical physical dimensions: 2.50mm length, 2.00mm width, and 0.55mm maximum seated height. The 4-SMD, No Lead package configuration is identical, ensuring compatibility with existing PCB layouts and reflow profiles.

Q: What is the significance of the RoHS3 compliance on the QT252S-16.000MEEV-T?

A: RoHS3 compliance indicates the QT252S-16.000MEEV-T meets Restriction of Hazardous Substances Directive requirements. This certification is relevant for applications subject to environmental regulations in specific markets. The 8Z-16.000MEEV-T does not list RoHS status in the provided specifications.

Q: How do the inventory levels affect part selection?

A: The QT252S-16.000MEEV-T has 3867 pieces in stock compared to 742 pieces for the 8Z-16.000MEEV-T. For high-volume production or extended lead time requirements, the QT252S-16.000MEEV-T offers greater supply availability while maintaining full electrical and mechanical equivalence.

Q: Are both parts suitable for the same operating temperature applications?

A: Yes. Both the 8Z-16.000MEEV-T and QT252S-16.000MEEV-T operate across the identical temperature range of -20°C to 70°C, ensuring equivalent thermal performance in specified applications.

Q: What does MSL 1 (Unlimited) moisture sensitivity mean for the QT252S-16.000MEEV-T?

A: MSL 1 (Unlimited) indicates the QT252S-16.000MEEV-T has the lowest moisture sensitivity level, requiring no special moisture control during storage, handling, or assembly. This simplifies supply chain management and reduces storage costs compared to higher MSL ratings.

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