ECS-110.5-20-7S-TR Equivalent & Substitute Parts

Part Overview

The ECS-110.5-20-7S-TR is a 11.0592 MHz crystal oscillator in 4-SOJ surface mount package with 20pF load capacitance and 60 Ohms ESR. This part is classified as Active product status. Substitute parts are necessary when the main part reaches end-of-life inventory levels, when design revisions require updated compliance certifications, or when alternative electrical characteristics better match circuit requirements.

Key Parameters

Parameter	Value
Frequency	11.0592 MHz
Frequency Tolerance	±30ppm
Load Capacitance	20pF
ESR (Equivalent Series Resistance)	60 Ohms
Operating Mode	Fundamental
Package / Case	4-SOJ, 9.40mm pitch
Operating Temperature Range	-10°C ~ 70°C
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution eligibility for the ECS-110.5-20-7S-TR is determined by the following critical parameters:

Mandatory Match Parameters:

Frequency: 11.0592 MHz (exact match required)
Frequency Tolerance: ±30ppm (exact match required)
Operating Mode: Fundamental (exact match required)
Package / Case: 4-SOJ, 9.40mm pitch (exact match required)
Operating Temperature Range: -10°C ~ 70°C (exact match required)
Mounting Type: Surface Mount (exact match required)

Allowable Variation Parameters:

Load Capacitance: 20pF or 18pF (within circuit design tolerance)
ESR: 60 Ohms or 50 Ohms (within circuit design tolerance)

Two substitute parts meet these criteria: ECS-110.5-20-7SX-TR and ECS-110.5-18-7SX-TR.

Parameter Comparison

Parameter	ECS-110.5-20-7S-TR (Main)	ECS-110.5-20-7SX-TR	ECS-110.5-18-7SX-TR
Frequency	11.0592 MHz	11.0592 MHz	11.0592 MHz
Frequency Stability	±50ppm	±50ppm	±50ppm
Frequency Tolerance	±30ppm	±30ppm	±30ppm
Load Capacitance	20pF	20pF	18pF
ESR	60 Ohms	50 Ohms	50 Ohms
Operating Mode	Fundamental	Fundamental	Fundamental
Package / Case	4-SOJ, 9.40mm pitch	4-SOJ, 9.40mm pitch	4-SOJ, 9.40mm pitch
Size / Dimension	12.50mm x 4.60mm	12.50mm x 4.60mm	12.50mm x 4.60mm
Height - Seated (Max)	3.70mm	3.70mm	3.70mm
Operating Temperature	-10°C ~ 70°C	-10°C ~ 70°C	-10°C ~ 70°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Not For New Designs	Not For New Designs

Engineering Selection Recommendations

ECS-110.5-20-7SX-TR provides direct electrical equivalence to the main part with identical load capacitance (20pF) and lower ESR (50 Ohms vs 60 Ohms). This part carries ROHS3 compliance certification, whereas the main part is RoHS non-compliant. The product status is Not For New Designs.

ECS-110.5-18-7SX-TR differs in load capacitance (18pF vs 20pF) and ESR (50 Ohms vs 60 Ohms). This part also carries ROHS3 compliance certification. The product status is Not For New Designs. Selection of this part requires circuit design verification to confirm that 18pF load capacitance is acceptable for the application.

Both substitute parts maintain identical frequency, frequency tolerance, operating mode, package configuration, and temperature range as the main part.

Frequently Asked Questions (FAQ)

Q: Can ECS-110.5-20-7SX-TR be used as a direct replacement for ECS-110.5-20-7S-TR?

A: Yes. Both parts share identical frequency (11.0592 MHz), frequency tolerance (±30ppm), load capacitance (20pF), package (4-SOJ, 9.40mm pitch), and operating temperature range (-10°C ~ 70°C). The ESR difference (50 Ohms vs 60 Ohms) is within acceptable substitution parameters. The primary difference is RoHS compliance status.

Q: Can ECS-110.5-18-7SX-TR be used as a direct replacement for ECS-110.5-20-7S-TR?

A: Substitution requires circuit design verification. Both parts share identical frequency, frequency tolerance, package, and operating temperature range. The load capacitance differs (18pF vs 20pF), which may affect circuit oscillation characteristics. ESR also differs (50 Ohms vs 60 Ohms). Circuit simulation or testing is necessary to confirm compatibility with the specific application.

Q: What is the significance of the load capacitance difference between 20pF and 18pF?

A: Load capacitance determines the external capacitor values required in the crystal oscillator circuit. A 2pF difference may require adjustment of external load capacitors to maintain frequency accuracy and stability. Circuit design parameters must be reviewed before substitution.

Q: Why are the substitute parts marked "Not For New Designs"?

A: Product status indicates manufacturing or design phase classification. Parts marked "Not For New Designs" may have limited future availability or represent earlier product generations. The main part (Active status) is the preferred choice for new designs when available.

Q: Are all three parts mechanically interchangeable?

A: Yes. All three parts use identical 4-SOJ package with 9.40mm pitch, identical dimensions (12.50mm x 4.60mm), and identical maximum seated height (3.70mm). Mechanical interchangeability is confirmed for PCB layout and assembly purposes.

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