7M-16.000MEEC-T Equivalent & Substitute Parts Reference

Part Overview

The 7M-16.000MEEC-T is a 16 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 and MSL 1 rated, indicating unlimited moisture sensitivity protection.

Substitute parts are identified when design requirements permit variations in load capacitance, equivalent series resistance (ESR), or physical dimensions while maintaining the core 16 MHz frequency specification and ±10ppm stability parameters. Alternative sources and package variants expand procurement flexibility and inventory availability.

Key Parameters

Parameter	Value	Unit	Substitution Criticality
Frequency	16.0000	MHz	Fixed - Non-negotiable
Frequency Stability	±10	ppm	Fixed - Non-negotiable
Frequency Tolerance	±10	ppm	Fixed - Non-negotiable
Load Capacitance	9	pF	Variable - Design dependent
ESR (Equivalent Series Resistance)	80	Ohms	Variable - Design dependent
Operating Mode	Fundamental	—	Fixed - Non-negotiable
Operating Temperature Range	-20 to 70	°C	Fixed - Non-negotiable
Mounting Type	Surface Mount	—	Fixed - Non-negotiable
Package / Case	4-SMD, No Lead	—	Fixed - Non-negotiable
RoHS Status	RoHS Compliant	—	Fixed - Regulatory
MSL Rating	1 (Unlimited)	—	Fixed - Handling requirement

Substitute Part Grouping Explanation

Substitution logic for the 7M-16.000MEEC-T is based on the following criteria:

Non-negotiable Parameters (Must Match Exactly):

Frequency: 16.0000 MHz
Frequency Stability: ±10ppm
Frequency Tolerance: ±10ppm
Operating Mode: Fundamental
Operating Temperature Range: -20°C to 70°C
Mounting Type: Surface Mount
Package Type: 4-SMD, No Lead
RoHS Compliance Status

Variable Parameters (Design-Dependent Substitution Allowed):

Load Capacitance: 9pF (main part) — substitutes range from 8pF to 10pF based on circuit design requirements
ESR: 80 Ohms (main part) — substitutes range from 60 to 100 Ohms based on oscillator circuit impedance matching
Physical Dimensions: Variations permitted within SMD package constraints (2.00mm × 2.50mm to 3.20mm × 2.50mm footprints)
Height: Variations from 0.55mm to 0.80mm seated height
Packaging Format: Tape & Reel (TR) or Cut Tape (CT) formats are interchangeable for procurement purposes

Substitute parts are grouped by load capacitance alignment (8pF, 9pF, or 10pF) and ESR specifications, as these parameters directly affect circuit oscillation characteristics and must be verified against the application schematic before substitution.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Frequency (MHz)	Load Capacitance (pF)	ESR (Ohms)	Package Dimensions (mm)	Height Max (mm)	RoHS Status	Inventory (Pcs)
7M-16.000MEEC-T	TXC CORPORATION	16.0000	9	80	3.20 × 2.50	0.80	RoHS Compliant	1,065
7M-16.000MEEQ-T	TXC CORPORATION	16.0000	10	80	3.20 × 2.50	0.80	RoHS Compliant	117,862
8Z-16.000MEEQ-T	TXC CORPORATION	16.0000	10	100	2.50 × 2.00	0.55	RoHS Compliant	16,757
403C11A16M00000	CTS-Frequency Controls	16.0000	10	80	3.20 × 2.50	0.80	ROHS3 Compliant	28,723
ABM8W-16.0000MHZ-8-B1U-T3	Abracon LLC	16.0000	8	70	3.20 × 2.50	0.75	ROHS3 Compliant	4,810
CS00527-16M	NDK America, Inc.	16.0000	10	60	3.20 × 2.50	0.70	ROHS3 Compliant	119,103
ECS-160-10-33B-CKM-TR	ECS Inc.	16.0000	10	60	3.20 × 2.50	0.80	ROHS3 Compliant	16,736
ECS-160-10-36-CKM-TR	ECS Inc.	16.0000	10	80	2.50 × 2.00	0.60	ROHS3 Compliant	3,069
ECS-160-10-36B-CKM-TR	ECS Inc.	16.0000	10	70	2.50 × 2.00	0.60	ROHS3 Compliant	4,652
ECS-160-10-42-CKM-TR	ECS Inc.	16.0000	10	60	4.00 × 2.50	0.80	ROHS3 Compliant	3,581
ECS-160-8-36CKM-TR	ECS Inc.	16.0000	8	80	2.50 × 2.00	0.65	ROHS3 Compliant	42,766

Engineering Selection Recommendations

Primary Substitution Tier (Highest Compatibility):

The 7M-16.000MEEQ-T (TXC CORPORATION) is the closest functional equivalent, differing only in load capacitance (10pF vs. 9pF). Both parts share identical frequency, stability, ESR, package dimensions, and RoHS compliance status. This substitution is valid when circuit design permits 10pF load capacitance operation.

The 403C11A16M00000 (CTS-Frequency Controls) provides equivalent electrical specifications (16 MHz, ±10ppm, 10pF, 80 Ohms) with identical package dimensions and ROHS3 compliance. This part expands procurement sourcing from an alternative qualified manufacturer.

Secondary Substitution Tier (ESR or Load Capacitance Variation):

Parts with 10pF load capacitance and alternative ESR values (60–70 Ohms) are substitutable when circuit design accommodates lower impedance operation:

CS00527-16M (NDK America, Inc.): 60 Ohms ESR
ECS-160-10-33B-CKM-TR (ECS Inc.): 60 Ohms ESR
ECS-160-10-36B-CKM-TR (ECS Inc.): 70 Ohms ESR

Parts with 8pF load capacitance are substitutable when circuit design is optimized for lower capacitive loading:

ABM8W-16.0000MHZ-8-B1U-T3 (Abracon LLC): 8pF, 70 Ohms
ECS-160-8-36CKM-TR (ECS Inc.): 8pF, 80 Ohms

Compact Package Alternatives (Space-Constrained Designs):

The 8Z-16.000MEEQ-T (TXC CORPORATION) and ECS compact variants (2.50mm × 2.00mm footprint) are substitutable when PCB space is limited, provided circuit design accommodates 10pF load capacitance and higher ESR values (70–100 Ohms).

Compliance and Regulatory Status:

All listed substitutes maintain RoHS compliance (RoHS Compliant or ROHS3 Compliant status). All parts are Active products with unlimited MSL rating (MSL 1), ensuring consistent moisture sensitivity handling requirements. REACH and ECCN classifications are uniform across all parts.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 7M-16.000MEEC-T with the 7M-16.000MEEQ-T?

A: Yes. Both parts are manufactured by TXC CORPORATION with identical frequency (16 MHz), stability (±10ppm), ESR (80 Ohms), package dimensions (3.20mm × 2.50mm), and RoHS compliance. The only difference is load capacitance: 9pF (main part) versus 10pF (substitute). Substitution is valid if your circuit design accommodates 10pF load capacitance. Verify the oscillator circuit schematic to confirm load capacitance compatibility before implementation.

Q: What is the difference between 9pF and 10pF load capacitance?

A: Load capacitance is the external capacitance value the crystal oscillator circuit is designed to operate with. The 9pF specification indicates the main part is optimized for circuits with 9pF total load capacitance. A 10pF substitute will operate at a slightly different frequency offset within the ±10ppm tolerance band. Both specifications fall within the same ±10ppm stability window, but circuit design must account for this capacitive difference. Consult your oscillator circuit design documentation to determine which load capacitance value is required.

Q: Can I use a part with lower ESR (60 Ohms) instead of 80 Ohms?

A: Yes, if your circuit design permits. Lower ESR values (60 Ohms) reduce power consumption and improve oscillation startup characteristics. The 7M-16.000MEEC-T specifies 80 Ohms ESR. Substitutes with 60 Ohms ESR (such as CS00527-16M or ECS-160-10-33B-CKM-TR) are compatible with most standard oscillator circuits. However, verify your circuit design specifications to confirm ESR tolerance limits before substitution.

Q: What is the difference between the 3.20mm × 2.50mm and 2.50mm × 2.00mm package sizes?

A: Both are 4-SMD, No Lead surface mount packages. The 3.20mm × 2.50mm package (main part and most substitutes) is the standard size. The 2.50mm × 2.00mm package (compact variants like 8Z-16.000MEEQ-T and ECS ECX-2236 series) is a smaller footprint for space-constrained PCB designs. Compact packages have lower seated height (0.55–0.65mm vs. 0.80mm). Substitution between sizes requires PCB layout modification and footprint redesign.

Q: Are all substitute parts RoHS compliant?

A: Yes. The main part 7M-16.000MEEC-T is RoHS Compliant. All listed substitute parts carry either RoHS Compliant or ROHS3 Compliant status, meeting equivalent environmental and hazardous substance restrictions. No substitutes introduce RoHS non-compliance concerns.

Q: What does MSL 1 (Unlimited) mean?

A: MSL (Moisture Sensitivity Level) 1 indicates the component has unlimited shelf life and requires no special moisture protection during storage or handling. All listed parts carry MSL 1 rating, ensuring consistent handling procedures across all substitutes.

Q: Can I substitute between Tape & Reel (TR) and Cut Tape (CT) packaging?

A: Yes, for procurement purposes. The 403C11A16M00000 (CTS-Frequency Controls) is supplied in Cut Tape (CT) & Digi-Reel® format, while most other substitutes use Tape & Reel (TR). Both packaging formats contain identical components; the difference is in supply format and reel configuration. Verify your assembly equipment compatibility with the packaging format before ordering.

Q: Which substitute offers the best inventory availability?

A: The CS00527-16M (NDK America, Inc.) has the highest inventory level at 119,103 pieces, followed by 7M-16.000MEEQ-T (TXC CORPORATION) at 117,862 pieces. Both parts offer 10pF load capacitance with 60 Ohms ESR (CS00527-16M) or 80 Ohms ESR (7M-16.000MEEQ-T), providing strong procurement flexibility for high-volume applications.

Q: Are there any frequency or stability differences between substitutes?

A: No. All listed substitute parts maintain the identical 16.0000 MHz frequency specification with ±10ppm frequency stability and ±10ppm frequency tolerance. Frequency and stability are non-negotiable parameters across all substitutes.

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