ABLS-25.000MHZ-20-F-T Equivalent & Substitute Parts

Part Overview

The ABLS-25.000MHZ-20-F-T is a 25 MHz fundamental mode crystal oscillator manufactured by Abracon LLC in HC-49/US surface mount package. This component is designed for frequency control and timing applications requiring precise 25 MHz oscillation. The part maintains Active product status with full RoHS3 compliance and REACH compliance. Substitute parts are identified when equivalent frequency, stability, and package specifications are maintained while accommodating variations in load capacitance and equivalent series resistance within acceptable application parameters.

Substiute Parts

ABLS-25.000MHZ-20-F-T

Abracon LLCIn Stock: 838ABLS-25.000MHZ-20-F-T Datasheet

Current PartRFQ

ABLS-LR-25.000MHZ-F-T

Abracon LLCIn Stock: 2847ABLS-LR-25.000MHZ-F-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The ABLS-LR-25.000MHZ-F-T qualifies as a substitute for the ABLS-25.000MHZ-20-F-T based on the following critical parameters:

• Frequency Match: Both parts operate at 25.0000 MHz
• Frequency Stability: Both maintain ±50 ppm stability
• Operating Mode: Both operate in Fundamental mode
• Temperature Range: Both support 0°C to 70°C operation
• Package Compatibility: Both use HC-49/US surface mount package with identical physical dimensions (11.40mm × 4.70mm length, 4.70mm width, 4.20mm maximum seated height)
• Compliance Alignment: Both are ROHS3 Compliant and REACH Affected

Variations in Load Capacitance (20 pF vs. 18 pF) and ESR (40 Ohms vs. 10 Ohms) represent design trade-offs within the HC-49/US crystal family and do not preclude substitution when circuit design accommodates these parameter differences.

Parameter Comparison

Engineering Selection Recommendations

Both the ABLS-25.000MHZ-20-F-T and ABLS-LR-25.000MHZ-F-T maintain Active product status from Abracon LLC, ensuring continued manufacturing support and supply chain availability. Both parts satisfy ROHS3 and REACH compliance requirements for regulated markets.

Selection between these parts depends on circuit-level load capacitance and ESR requirements. The ABLS-LR-25.000MHZ-F-T exhibits lower ESR (10 Ohms vs. 40 Ohms) and reduced load capacitance (18 pF vs. 20 pF), characteristics typical of low-resistance crystal designs. Circuit design must verify that oscillator tank capacitance and drive level specifications accommodate the 18 pF load capacitance of the substitute part.

Frequently Asked Questions (FAQ)

Q: Can ABLS-LR-25.000MHZ-F-T directly replace ABLS-25.000MHZ-20-F-T in existing designs?

A: Direct replacement requires verification that the circuit design accommodates 18 pF load capacitance instead of 20 pF. The lower ESR of the substitute part may affect oscillator startup behavior and drive level. Circuit simulation or prototype testing is necessary to confirm compatibility.

Q: What is the significance of the load capacitance difference?

A: Load capacitance determines the external capacitor values required in the oscillator circuit. A reduction from 20 pF to 18 pF requires adjustment of tank capacitors to maintain the specified 25 MHz frequency. Incorrect load capacitance matching results in frequency deviation beyond the ±50 ppm specification.

Q: Are both parts identical in physical dimensions?

A: Yes. Both parts use the HC-49/US package with identical length (11.40mm), width (4.70mm), and maximum seated height (4.20mm). PCB footprints and mechanical mounting are interchangeable.

Q: Do both parts meet the same compliance standards?

A: Yes. Both ABLS-25.000MHZ-20-F-T and ABLS-LR-25.000MHZ-F-T are ROHS3 Compliant and REACH Affected, meeting equivalent regulatory requirements for restricted substance use and chemical disclosure.

Q: What does the lower ESR of the substitute part mean for circuit performance?

A: Lower ESR (10 Ohms vs. 40 Ohms) reduces power dissipation in the crystal element and typically improves oscillator efficiency. However, lower ESR may require adjustment of drive level settings in the oscillator circuit to prevent excessive current and potential crystal damage.