8Z-26.000MEEC-T Equivalent & Substitute Parts

Part Overview

The 8Z-26.000MEEC-T is a 26 MHz fundamental mode crystal oscillator manufactured by TXC CORPORATION, designed for surface mount applications in 4-SMD, No Lead package configuration. This Active product operates across the -20°C to 70°C temperature range with ±10ppm frequency stability and tolerance specifications. The part is RoHS Compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Substitute parts are identified when equivalent electrical and mechanical parameters align with the main part specifications, enabling direct replacement in circuit designs without functional degradation.

Key Parameters

Parameter	Value	Unit
Frequency	26.0000	MHz
Frequency Stability	±10	ppm
Frequency Tolerance	±10	ppm
Load Capacitance	9	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	—
RoHS Status	RoHS Compliant	—
MSL Rating	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the 8Z-26.000MEEC-T is determined by the following critical parameters:

Primary Matching Criteria:

Frequency: 26.0000 MHz (exact match required)
Frequency Stability: ±10ppm (exact match required)
Frequency Tolerance: ±10ppm (exact match required)
Operating Mode: Fundamental (exact match required)
Operating Temperature Range: -20°C to 70°C (exact match required)
Mounting Type: Surface Mount (exact match required)
Package / Case: 4-SMD, No Lead (exact match required)

Secondary Matching Criteria (Allowable Variation):

Load Capacitance: 7pF to 10pF (within circuit design tolerance)
ESR: 60 to 150 Ohms (within circuit design tolerance)
Physical Dimensions: Variation permitted within SMD footprint compatibility
RoHS Status: RoHS Compliant or ROHS3 Compliant (both acceptable)

Parts meeting all primary criteria and operating within secondary parameter ranges are classified as direct substitutes.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Frequency (MHz)	Frequency Stability (ppm)	Load Capacitance (pF)	ESR (Ohms)	Operating Temperature (°C)	Package	RoHS Status
8Z-26.000MEEC-T	TXC CORPORATION	26.0000	±10	9	100	-20 to 70	4-SMD, No Lead	RoHS Compliant
8Q-26.000MEEY-T	FTS	26.0000	±10	7	100	-20 to 70	4-SMD, No Lead	RoHS Compliant
8Z-26.000MEEQ-T	TXC CORPORATION	26.0000	±10	10	100	-20 to 70	4-SMD, No Lead	RoHS Compliant
ABM12-115-26.000MHZ-T3	Abracon LLC	26.0000	±10	8	100	-20 to 70	4-SMD, No Lead	ROHS3 Compliant
ABM12W-26.0000MHZ-7-B1U-T3	Abracon LLC	26.0000	±10	7	100	-20 to 70	4-SMD, No Lead	ROHS3 Compliant
ABM12W-26.0000MHZ-8-B1U-T3	Abracon LLC	26.0000	±10	8	100	-20 to 70	4-SMD, No Lead	ROHS3 Compliant
ECS-260-8-37CKM	ECS Inc.	26.0000	±10	8	60	-20 to 70	4-SMD, No Lead	ROHS3 Compliant
ECS-260-8-47-CKM-TR	ECS Inc.	26.0000	±10	8	100	-20 to 70	4-SMD, No Lead	ROHS3 Compliant
ECS-260-8-47Q-CKM-TR	ECS Inc.	26.0000	±10	8	150	-20 to 70	4-SMD, No Lead	ROHS3 Compliant
ECS-260-9-47-CKM-TR	ECS Inc.	26.0000	±10	9	100	-20 to 70	4-SMD, No Lead	ROHS3 Compliant
Q 26,0-JXS21-10-10/10-FU-WA-LF	Jauch Quartz	26.0000	±10	10	60	-20 to 70	4-SMD, No Lead	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and meet or exceed the compliance requirements of the 8Z-26.000MEEC-T. Selection among substitutes should be based on the following engineering considerations:

Load Capacitance Matching: The 8Z-26.000MEEC-T operates at 9pF load capacitance. Parts with 8pF or 10pF load capacitance remain functionally compatible within standard circuit design tolerances. Parts with 7pF load capacitance operate at the lower boundary of the acceptable range.

ESR Considerations: The main part specifies 100 Ohms ESR. Substitute parts with 60 Ohms ESR (ECS-260-8-37CKM, Q 26,0-JXS21-10-10/10-FU-WA-LF) provide lower series resistance. Parts with 150 Ohms ESR (ECS-260-8-47Q-CKM-TR) operate at the upper tolerance limit.

Compliance Status: Both RoHS Compliant and ROHS3 Compliant designations satisfy regulatory requirements. All listed parts are REACH Unaffected or REACH information available upon request, indicating compliance with environmental regulations.

Packaging and Availability: ECS-260-9-47-CKM-TR provides the closest electrical match (26 MHz, ±10ppm, 9pF, 100 Ohms) with highest inventory availability (6826 Pcs). 8Z-26.000MEEQ-T offers same-manufacturer continuity with 10pF load capacitance and substantial inventory (31254 Pcs).

Frequently Asked Questions (FAQ)

Q: Can I substitute a 7pF load capacitance crystal for the 9pF specification?

A: Yes. The 7pF load capacitance operates within acceptable circuit design tolerance for 26 MHz fundamental mode crystals. Parts 8Q-26.000MEEY-T and ABM12W-26.0000MHZ-7-B1U-T3 meet this specification.

Q: What is the impact of ESR variation between 60 and 150 Ohms?

A: ESR affects oscillator startup time and power consumption. The 100 Ohms specification of the main part represents a mid-range value. Lower ESR (60 Ohms) reduces startup time; higher ESR (150 Ohms) increases it. All values within this range are functionally acceptable for standard 26 MHz applications.

Q: Are ROHS3 Compliant parts directly interchangeable with RoHS Compliant parts?

A: Yes. ROHS3 Compliant designation indicates compliance with the most current RoHS directive requirements and is fully compatible with applications requiring RoHS Compliant components.

Q: Does physical package size variation affect substitution eligibility?

A: Physical dimensions vary among substitutes (ranging from 1.60mm x 1.20mm to 2.50mm x 2.00mm), but all maintain 4-SMD, No Lead package classification. Verify PCB footprint compatibility before selection. Smaller packages (1.60mm x 1.20mm) fit standard 0603 equivalent footprints; larger packages (2.50mm x 2.00mm) require corresponding larger footprints.

Q: Which substitute offers the best inventory availability?

A: 8Z-26.000MEEQ-T (TXC CORPORATION) provides the highest inventory with 31254 Pcs in stock, followed by ECS-260-8-47-CKM-TR (ECS Inc.) with 19491 Pcs.

Q: Can I use a 10pF load capacitance crystal in a circuit designed for 9pF?

A: Yes. The 10pF specification operates within acceptable tolerance for 26 MHz fundamental mode applications. Parts 8Z-26.000MEEQ-T and Q 26,0-JXS21-10-10/10-FU-WA-LF meet this specification.

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