HCM4912000000ABIT Crystal Equivalent & Substitute Parts

Part Overview

The HCM4912000000ABIT is a 12 MHz fundamental mode crystal oscillator manufactured by Citizen Finedevice Co Ltd, supplied in HC-49/US surface mount package with tape and reel packaging. This active product operates across -10°C to 60°C with ±30ppm frequency tolerance and 16pF load capacitance. Substitute parts are identified to provide design flexibility when the primary part is unavailable or when specific electrical characteristics better suit application requirements.

Substiute Parts

HCM4912000000ABIT

Citizen Finedevice Co LtdIn Stock: 905HCM4912000000ABIT Datasheet

Current PartRFQ

HCM4912000000ABJT

Citizen Finedevice Co LtdIn Stock: 1922HCM4912000000ABJT Datasheet

SimilarRFQ

LFXTAL003210

IQD Frequency ProductsIn Stock: 1554LFXTAL003210 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HCM4912000000ABIT is determined by the following critical parameters: frequency (12 MHz), frequency tolerance (±30ppm), operating mode (fundamental), package type (HC-49/US), mounting type (surface mount), and operating temperature range (-10°C to 60°C). Load capacitance and ESR are secondary parameters that may vary within acceptable design margins.

Two substitute parts meet these core criteria:

HCM4912000000ABJT (Citizen Finedevice Co Ltd): Matches all primary parameters with identical frequency, tolerance, package, and temperature range. Load capacitance differs at 18pF versus 16pF; ESR remains 80 Ohms.

LFXTAL003210 (IQD Frequency Products): Matches all primary parameters with identical frequency, tolerance, package, and temperature range. Load capacitance matches at 16pF; ESR differs at 40 Ohms versus 80 Ohms.

Parameter Comparison

Engineering Selection Recommendations

All three parts—HCM4912000000ABIT, HCM4912000000ABJT, and LFXTAL003210—are active products with ROHS3 compliance and REACH unaffected status, suitable for current design implementations.

HCM4912000000ABJT provides direct manufacturer continuity within the Citizen Finedevice HCM49 series. The 18pF load capacitance variant accommodates circuits designed for higher capacitive loading while maintaining identical frequency tolerance and ESR characteristics.

LFXTAL003210 offers an alternative from IQD Frequency Products with lower ESR (40 Ohms versus 80 Ohms), which reduces power consumption and improves frequency stability in oscillator circuits. The width dimension is reduced to 3.80mm, providing a more compact footprint while maintaining identical height and length specifications.

Selection between HCM4912000000ABJT and LFXTAL003210 depends on circuit load capacitance requirements and ESR sensitivity. Both maintain full compliance with regulatory standards and temperature operating range specifications.

Frequently Asked Questions (FAQ)

Q: Can HCM4912000000ABJT replace HCM4912000000ABIT directly?

A: Yes. Both parts share identical frequency (12 MHz), frequency tolerance (±30ppm), operating temperature range (-10°C to 60°C), package type (HC-49/US), and ESR (80 Ohms). The load capacitance difference (18pF versus 16pF) requires circuit verification to confirm compatibility with the oscillator design.

Q: What is the primary difference between LFXTAL003210 and HCM4912000000ABIT?

A: Both parts match on frequency, tolerance, temperature range, and package. LFXTAL003210 features lower ESR (40 Ohms versus 80 Ohms) and a narrower width (3.80mm versus 4.70mm). Load capacitance is identical at 16pF.

Q: Are all three parts suitable for new designs?

A: Yes. All three parts carry active product status with ROHS3 compliance and REACH unaffected designation, making them appropriate for current production designs.

Q: Does the load capacitance difference affect substitution compatibility?

A: Load capacitance is a secondary parameter determined by circuit design. Circuits designed for 16pF load capacitance require verification before substituting with the 18pF variant (HCM4912000000ABJT). Circuits designed for 16pF load capacitance are compatible with LFXTAL003210.

Q: What is the significance of ESR differences?

A: ESR affects oscillator startup time, power consumption, and frequency stability. Lower ESR (LFXTAL003210 at 40 Ohms) improves performance in power-sensitive applications. Higher ESR (HCM4912000000ABIT and HCM4912000000ABJT at 80 Ohms) is suitable for standard applications with adequate power supply.

Q: Are there physical mounting differences between these parts?

A: All three parts use HC-49/US surface mount package with identical height (4.30mm maximum). Width varies: HCM4912000000ABIT and HCM4912000000ABJT are 4.70mm wide; LFXTAL003210 is 3.80mm wide. Length is identical at 11.40mm for all parts.