SG-310SCF 20.0000ML3 Equivalent & Substitute Parts

Part Overview

The SG-310SCF 20.0000ML3 is a 20 MHz XO (Standard) CMOS oscillator manufactured by EPSON, designed for applications requiring a crystal-based resonator with 3.3V supply and standby power-down functionality. The part operates across the industrial temperature range of -40°C to 85°C and is packaged in a 4-SMD, No Lead surface mount configuration.

This part is currently listed as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this oscillator.

Substiute Parts

SG-310SCF 20.0000ML3

EPSONIn Stock: 1199SG-310SCF 20.0000ML3 Datasheet

Current PartRFQ

ASEM1-20.000MHZ-LC-T

Abracon LLCIn Stock: 1156ASEM1-20.000MHZ-LC-T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SG-310SCF 20.0000ML3 is determined by strict alignment of the following critical parameters:

• Frequency: 20 MHz (exact match required)
• Output Type: CMOS (exact match required)
• Supply Voltage: 3.3V (exact match required)
• Frequency Stability: ±50ppm (exact match required)
• Operating Temperature Range: -40°C to 85°C (exact match required)
• Package / Case: 4-SMD, No Lead (exact match required)
• Size / Dimension: 0.126" L x 0.098" W (3.20mm x 2.50mm) (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Function: Standby (Power Down) (exact match required)
• RoHS Status: ROHS3 Compliant (exact match required)
• Moisture Sensitivity Level: 1 (Unlimited) (exact match required)

The ASEM1-20.000MHZ-LC-T from Abracon LLC meets all substitution criteria. The primary technical difference is the resonator technology: the SG-310SCF uses a crystal-based resonator, while the ASEM1 employs MEMS (Micro-Electro-Mechanical Systems) technology. Both deliver identical electrical performance across all specified parameters.

Parameter Comparison

Engineering Selection Recommendations

The ASEM1-20.000MHZ-LC-T is a direct functional substitute for the obsolete SG-310SCF 20.0000ML3. Both parts satisfy identical electrical and mechanical specifications, ensuring pin-compatible operation within existing PCB designs.

The ASEM1 offers the advantage of active product status, ensuring long-term availability and supply chain continuity. Both parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity ratings, supporting standard manufacturing and storage practices.

The ASEM1 exhibits lower supply current in disable mode (1µA versus 2µA) and a reduced seated height (0.035" versus 0.047"), providing marginal improvements in power efficiency and PCB real estate. The ASEM1 operates at higher active supply current (15mA versus 2.5mA); this difference reflects MEMS versus crystal resonator technology and does not affect functional compatibility when supply capacity is adequate.

Frequently Asked Questions (FAQ)

Q: Can the ASEM1-20.000MHZ-LC-T be used as a direct replacement for the SG-310SCF 20.0000ML3?

A: Yes. Both parts deliver identical electrical performance across frequency, output type, supply voltage, frequency stability, operating temperature range, and standby functionality. The 4-SMD, No Lead package and footprint dimensions are identical, enabling direct PCB substitution without layout modification.

Q: What is the primary technical difference between these parts?

A: The SG-310SCF uses a crystal-based resonator, while the ASEM1 employs MEMS technology. Both technologies deliver the specified ±50ppm frequency stability and identical electrical characteristics. MEMS oscillators offer improved shock and vibration resistance compared to crystal-based designs.

Q: Why does the ASEM1 have higher active supply current?

A: The ASEM1's 15mA active supply current reflects the power requirements of MEMS oscillator circuitry. This does not affect functional compatibility provided the power supply can deliver the required current. The ASEM1 offers superior disable-mode efficiency (1µA versus 2µA).

Q: Are both parts RoHS compliant?

A: Yes. Both the SG-310SCF and ASEM1 are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings, supporting standard manufacturing processes and storage conditions.

Q: What is the height difference between these parts?

A: The SG-310SCF has a maximum seated height of 0.047" (1.20mm), while the ASEM1 measures 0.035" (0.90mm). The ASEM1's lower profile may provide marginal PCB clearance advantages in space-constrained designs.

Q: Is the ASEM1 currently available?

A: Yes. The ASEM1-20.000MHZ-LC-T is listed as active product status, ensuring ongoing availability and supply chain support, unlike the obsolete SG-310SCF.