ECS-240-16-7S-TR Equivalent & Substitute Parts

Part Overview

The ECS-240-16-7S-TR is a 24 MHz fundamental mode crystal oscillator in a 4-SOJ surface mount package with 16pF load capacitance and 30 Ohms ESR. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. Organizations using this part in active production or maintenance applications require equivalent substitute options that maintain electrical and mechanical compatibility while potentially offering improved compliance certifications.

Key Parameters

Parameter	Value
Manufacturer Part Number	ECS-240-16-7S-TR
Manufacturer	ECS Inc.
Frequency	24 MHz
Frequency Tolerance	±30ppm
Load Capacitance	16pF
ESR (Equivalent Series Resistance)	30 Ohms
Operating Mode	Fundamental
Operating Temperature Range	-10°C ~ 70°C
Package / Case	4-SOJ, 9.40mm pitch
Physical Dimensions	12.50mm L x 4.60mm W x 3.70mm H (max)
Mounting Type	Surface Mount
Packaging	Tape & Reel (TR)
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the ECS-240-16-7S-TR is determined by the following critical parameters:

Fixed Parameters (Must Match):

Frequency: 24 MHz
Frequency Tolerance: ±30ppm
Operating Mode: Fundamental
Operating Temperature Range: -10°C ~ 70°C
Package / Case: 4-SOJ, 9.40mm pitch
Physical Dimensions: 12.50mm L x 4.60mm W x 3.70mm H (max)
Mounting Type: Surface Mount
Packaging: Tape & Reel (TR)

Variable Parameters (Allowed Variation):

Load Capacitance: 16pF, 18pF, or 20pF
ESR: 30 Ohms or 50 Ohms
RoHS Status: RoHS non-compliant or ROHS3 Compliant
Series Designation: ECX-3S or ECX-3SX

The three substitute parts listed below maintain all fixed parameters while offering different load capacitance and ESR combinations, enabling selection based on circuit design requirements and compliance needs.

Parameter Comparison

Parameter	ECS-240-16-7S-TR	ECS-240-18-7SX-TR	ECS-240-20-7S-TR	ECS-240-20-7SX-TR
Frequency	24 MHz	24 MHz	24 MHz	24 MHz
Frequency Tolerance	±30ppm	±30ppm	±30ppm	±30ppm
Load Capacitance	16pF	18pF	20pF	20pF
ESR	30 Ohms	50 Ohms	30 Ohms	50 Ohms
Operating Mode	Fundamental	Fundamental	Fundamental	Fundamental
Operating Temperature	-10°C ~ 70°C	-10°C ~ 70°C	-10°C ~ 70°C	-10°C ~ 70°C
Package / Case	4-SOJ, 9.40mm pitch	4-SOJ, 9.40mm pitch	4-SOJ, 9.40mm pitch	4-SOJ, 9.40mm pitch
Physical Dimensions	12.50mm x 4.60mm x 3.70mm	12.50mm x 4.60mm x 3.70mm	12.50mm x 4.60mm x 3.70mm	12.50mm x 4.60mm x 3.70mm
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	RoHS non-compliant	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant
Series	ECX-3S	ECX-3SX	ECX-3S	ECX-3SX
Product Status	Not For New Designs	Not For New Designs	Not For New Designs	Not For New Designs

Engineering Selection Recommendations

All four parts in this substitution group share identical frequency, tolerance, operating mode, temperature range, and package specifications. Selection among these parts depends on two primary factors:

Load Capacitance Selection: The ECS-240-16-7S-TR operates at 16pF load capacitance. Substitute parts offer 18pF or 20pF options. Load capacitance selection must align with the oscillator circuit design and the load capacitance specification of the connected integrated circuit or oscillator circuit topology.

RoHS Compliance: The original ECS-240-16-7S-TR is RoHS non-compliant. For applications requiring RoHS3 compliance, the ECS-240-18-7SX-TR and ECS-240-20-7SX-TR (both ECX-3SX series) provide compliant alternatives. For applications without RoHS compliance requirements, the ECX-3S series parts (ECS-240-16-7S-TR and ECS-240-20-7S-TR) remain available.

ESR Consideration: ESR values of 30 Ohms and 50 Ohms are both present in the substitute group. ESR affects oscillator startup characteristics and power consumption. Circuit design specifications determine acceptable ESR ranges.

Frequently Asked Questions (FAQ)

Q: Can I substitute the ECS-240-16-7S-TR with any of the listed parts?

A: Substitution is possible only if your circuit design accommodates the load capacitance of the substitute part. The ECS-240-18-7SX-TR requires 18pF load capacitance, and the ECS-240-20-7S-TR and ECS-240-20-7SX-TR require 20pF load capacitance. Verify that your oscillator circuit or connected IC supports the substitute part's load capacitance specification before implementation.

Q: What is the difference between ECX-3S and ECX-3SX series?

A: The primary difference is RoHS compliance status. ECX-3S series parts are RoHS non-compliant, while ECX-3SX series parts are ROHS3 compliant. Both series maintain identical frequency, tolerance, operating mode, temperature range, and package specifications.

Q: Does ESR affect my circuit design?

A: ESR (Equivalent Series Resistance) influences crystal oscillator startup behavior and power consumption. The substitute parts offer ESR values of 30 Ohms or 50 Ohms. Consult your oscillator circuit design documentation to determine acceptable ESR ranges for your application.

Q: Are all substitute parts in the same physical package?

A: Yes. All parts listed use the 4-SOJ package with 9.40mm pitch and identical physical dimensions (12.50mm L x 4.60mm W x 3.70mm H maximum). They are mechanically interchangeable on the PCB.

Q: What happens if I use a substitute part with different load capacitance?

A: Using a crystal with load capacitance different from the circuit design specification may result in frequency deviation, reduced oscillator stability, or startup failure. Load capacitance must match the oscillator circuit design requirements.

Q: Are all parts available in Tape & Reel packaging?

A: Yes. All parts listed are supplied in Tape & Reel (TR) packaging format.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message