Equivalent & Substitute Parts for 8Q-26.000MEEV-T

Part Overview

The 8Q-26.000MEEV-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 part operates at 26.000 MHz with ±10ppm frequency stability and 8pF load capacitance, suitable for timing and clock generation in electronic systems. The part is currently Active in product status with 1040 pieces in stock inventory. Alternative equivalent and substitute parts are necessary to address supply chain flexibility, inventory availability across multiple manufacturers, and design optimization for specific load capacitance or ESR requirements.

Key Parameters

Parameter	Value	Unit
Frequency	26.000	MHz
Frequency Stability	±10	ppm
Load Capacitance	8	pF
ESR (Equivalent Series Resistance)	100	Ohms
Operating Mode	Fundamental	—
Operating Temperature Range	-20 to 70	°C
Package Type	4-SMD, No Lead	—
Physical Dimensions	1.60 x 1.20	mm
Height (Seated Max)	0.40	mm
Mounting Type	Surface Mount	—
Packaging Format	Tape & Reel (TR)	—
RoHS Status	RoHS Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the 8Q-26.000MEEV-T is determined by strict adherence to the following critical parameters:

Primary Substitution Criteria:

Frequency: 26.000 MHz (exact match required)
Frequency Stability: ±10ppm (exact match required)
Operating Mode: Fundamental (exact match required)
Package Type: 4-SMD, No Lead (exact match required)
Physical Dimensions: 1.60mm x 1.20mm (exact match required)
Operating Temperature Range: -20°C to 70°C (exact match or wider range acceptable)
Mounting Type: Surface Mount (exact match required)
Packaging Format: Tape & Reel (TR) (exact match required)

Secondary Substitution Parameters (Allowable Variation):

Load Capacitance: 7pF, 8pF, or 9pF (within circuit design tolerance)
ESR: 100 Ohms or 150 Ohms (within circuit design tolerance)
Height (Seated Max): 0.35mm to 0.40mm (within PCB assembly clearance)
RoHS Status: RoHS Compliant or ROHS3 Compliant (both acceptable)
MSL: 1 (Unlimited) or Not Applicable (both acceptable)

Substitute parts are grouped into three categories based on load capacitance variation: 7pF variants, 8pF variants (direct equivalents), and 9pF variants. ESR variation is permitted only when circuit design specifications allow tolerance for 150 Ohms maximum.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Frequency (MHz)	Frequency Stability (ppm)	Load Capacitance (pF)	ESR (Ohms)	Dimensions (mm)	Height Max (mm)	RoHS Status	Inventory (Pcs)
8Q-26.000MEEV-T	TXC CORPORATION	26.000	±10	8	100	1.60 x 1.20	0.40	RoHS Compliant	1040
8Q-26.000MEEY-T	FTS	26.000	±10	7	100	1.60 x 1.20	0.40	RoHS Compliant	3705
ECS-260-8-47-CKM-TR	ECS Inc.	26.000	±10	8	100	1.60 x 1.20	0.35	ROHS3 Compliant	19491
ABM12-115-26.000MHZ-T3	Abracon LLC	26.000	±10	8	100	1.65 x 1.25	0.40	ROHS3 Compliant	14269
ABM12W-26.0000MHZ-7-B1U-T3	Abracon LLC	26.000	±10	7	100	1.60 x 1.20	0.40	ROHS3 Compliant	1616
ECS-260-8-47Q-CKM-TR	ECS Inc.	26.000	±10	8	150	1.60 x 1.20	0.40	ROHS3 Compliant	1744
ECS-260-9-47-CKM-TR	ECS Inc.	26.000	±10	9	100	1.60 x 1.20	0.35	ROHS3 Compliant	6826
ABM12W-26.0000MHZ-8-B1U-T3	Abracon LLC	26.000	±10	8	100	1.60 x 1.20	0.40	ROHS3 Compliant	1125

Engineering Selection Recommendations

Direct Equivalents (8pF Load Capacitance, 100 Ohms ESR):

The following parts are direct parametric equivalents to the 8Q-26.000MEEV-T and provide identical electrical performance:

ECS-260-8-47-CKM-TR (ECS Inc.): Highest inventory availability at 19,491 pieces. Dimensions 1.60 x 1.20mm with 0.35mm seated height. ROHS3 Compliant. Suitable for direct replacement in all applications requiring 8pF load capacitance and 100 Ohms ESR.
ABM12-115-26.000MHZ-T3 (Abracon LLC): 14,269 pieces in stock. Dimensions 1.65 x 1.25mm with 0.40mm seated height. ROHS3 Compliant. Slight dimensional variation requires PCB layout verification for clearance compatibility.
ABM12W-26.0000MHZ-8-B1U-T3 (Abracon LLC): 1,125 pieces in stock. Dimensions 1.60 x 1.20mm with 0.40mm seated height. ROHS3 Compliant. Identical to main part specifications with lower inventory.

Load Capacitance Variants (7pF):

8Q-26.000MEEY-T (FTS): 3,705 pieces in stock. 7pF load capacitance with 100 Ohms ESR. Suitable when circuit design accommodates 7pF load capacitance specification.
ABM12W-26.0000MHZ-7-B1U-T3 (Abracon LLC): 1,616 pieces in stock. 7pF load capacitance with 100 Ohms ESR. Identical dimensions to main part.

Load Capacitance Variants (9pF):

ECS-260-9-47-CKM-TR (ECS Inc.): 6,826 pieces in stock. 9pF load capacitance with 100 Ohms ESR. Suitable when circuit design accommodates 9pF load capacitance specification.

ESR Variant (150 Ohms):

ECS-260-8-47Q-CKM-TR (ECS Inc.): 1,744 pieces in stock. 8pF load capacitance with 150 Ohms ESR. AEC-Q200 rated. Suitable only when circuit design specifications permit 150 Ohms ESR maximum.

Selection Priority:

Verify circuit design load capacitance tolerance (7pF, 8pF, or 9pF acceptable range)
Verify circuit design ESR tolerance (100 Ohms or 150 Ohms acceptable range)
Confirm PCB layout clearance for physical dimensions and seated height
Select part with highest inventory availability meeting all electrical and mechanical requirements
Verify RoHS compliance status matches system requirements (RoHS Compliant or ROHS3 Compliant both acceptable)

Frequently Asked Questions (FAQ)

Q: Can I substitute the 8Q-26.000MEEV-T with a 7pF load capacitance variant?

A: Substitution with 7pF variants (8Q-26.000MEEY-T or ABM12W-26.0000MHZ-7-B1U-T3) is permitted only if your circuit design specifications explicitly allow 7pF load capacitance operation. Load capacitance affects oscillation frequency and circuit stability. Verify circuit design documentation before substitution.

Q: What is the difference between 100 Ohms and 150 Ohms ESR variants?

A: ESR (Equivalent Series Resistance) affects crystal drive level and power consumption. The main part specifies 100 Ohms ESR. The ECS-260-8-47Q-CKM-TR variant with 150 Ohms ESR is suitable only if your circuit design specifications permit this higher ESR value. Verify circuit design documentation before substitution.

Q: Are there dimensional compatibility issues between substitute parts?

A: Most substitute parts maintain the 1.60 x 1.20mm footprint. The ABM12-115-26.000MHZ-T3 has slightly larger dimensions (1.65 x 1.25mm). Verify PCB layout clearance and component placement before substitution. Seated height varies between 0.35mm and 0.40mm; confirm PCB assembly clearance specifications.

Q: Which substitute part has the highest inventory availability?

A: ECS-260-8-47-CKM-TR provides the highest inventory at 19,491 pieces. This part is a direct parametric equivalent with 8pF load capacitance and 100 Ohms ESR, identical to the main part specifications.

Q: Are all substitute parts RoHS compliant?

A: The main part 8Q-26.000MEEV-T is RoHS Compliant. All substitute parts listed are either RoHS Compliant or ROHS3 Compliant. Both compliance statuses are acceptable for RoHS-regulated applications.

Q: Can I use a 9pF load capacitance variant as a substitute?

A: Substitution with 9pF variants (ECS-260-9-47-CKM-TR) is permitted only if your circuit design specifications explicitly allow 9pF load capacitance operation. Load capacitance affects oscillation frequency and circuit stability. Verify circuit design documentation before substitution.

Q: What is the difference between the main part and ECS-260-8-47Q-CKM-TR?

A: The ECS-260-8-47Q-CKM-TR differs in two aspects: ESR is 150 Ohms (versus 100 Ohms in the main part) and it carries AEC-Q200 automotive qualification rating. This part is suitable only for applications where 150 Ohms ESR is acceptable and automotive qualification is required or beneficial.

Q: Are all substitute parts available in Tape & Reel (TR) packaging?

A: All substitute parts listed are supplied in Tape & Reel (TR) packaging format, matching the main part packaging specification.

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