501HCAM032768DAG Equivalent & Substitute Parts

Part Overview

The 501HCAM032768DAG is a 32.768 kHz CMEMS® LVCMOS Oscillator manufactured by Silicon Labs, designed for low-frequency timing applications requiring enable/disable functionality. This component operates across a wide supply voltage range of 1.7V to 3.6V with frequency stability of ±20ppm and a maximum supply current of 4.9mA. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

501HCAM032768DAG

Silicon LabsIn Stock: 1102501HCAM032768DAG Datasheet

Current PartRFQ

ASDK1-32.768KHZ-LRT

Abracon LLCIn Stock: 946ASDK1-32.768KHZ-LRT Datasheet

SimilarRFQ

SIT1533AI-H4-DCC-32.768G

SiTimeIn Stock: 3365SIT1533AI-H4-DCC-32.768G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 501HCAM032768DAG is determined by the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 32.768 kHz (exact match required)
• Output Type: LVCMOS (electrical compatibility)
• Package Type: 4-SMD, No Lead (mechanical compatibility)
• Operating Temperature Range: -40°C ~ 85°C (minimum requirement)

Compatible Variation Parameters:

• Supply Voltage Range: Substitute must support the operating voltage of the target application; wider ranges are acceptable
• Frequency Stability: Substitute stability must meet or exceed application requirements
• Supply Current: Lower current consumption is acceptable; higher consumption requires application verification
• Function: Enable/Disable capability is preferred but not mandatory for all applications

The two identified substitute parts meet these criteria through different resonator technologies (MEMS and Crystal-based oscillators), both maintaining the required 32.768 kHz frequency, LVCMOS output, and identical package form factor.

Parameter Comparison

Engineering Selection Recommendations

SIT1533AI-H4-DCC-32.768G (SiTime): This substitute offers the closest electrical alignment with the 501HCAM032768DAG. Both components utilize MEMS resonator technology and provide LVCMOS output. The SIT1533 features an extended supply voltage range (1.5V ~ 3.63V) that encompasses the original part's operating window. Current consumption is significantly reduced to 1.4µA, providing power efficiency benefits. The component is actively manufactured with ROHS3 compliance and unlimited moisture sensitivity rating. The smaller physical footprint (2.00mm x 1.20mm) may require PCB layout verification. Frequency stability specification (+100ppm) is broader than the original part; applications requiring ±20ppm stability must be evaluated against actual system tolerance requirements.

ASDK1-32.768KHZ-LRT (Abracon LLC): This crystal-based oscillator provides a cost-effective alternative with active product status and ROHS3 compliance. The component maintains identical package dimensions to the original part (2.50mm x 2.00mm), simplifying PCB integration. Supply voltage is fixed at 2.5V, requiring verification that target applications operate within this constraint. Frequency stability of ±25ppm is comparable to the original specification. Supply current of 2.5mA is moderate and suitable for battery-powered applications. Enable/Disable functionality is retained. The unlimited moisture sensitivity rating (MSL 1) provides superior reliability compared to the original part's 1-year limitation.

Both substitutes are actively manufactured and carry current compliance certifications, ensuring long-term availability and regulatory alignment.

Frequently Asked Questions (FAQ)

Q: Can the SIT1533AI-H4-DCC-32.768G be used as a direct replacement without PCB modifications?

A: The SIT1533 maintains electrical compatibility through identical frequency, output type, and package classification. However, the physical footprint is smaller (2.00mm x 1.20mm versus 2.50mm x 2.00mm), requiring PCB layout verification. Pin-to-pin compatibility must be confirmed against the original design schematic.

Q: What is the significance of the frequency stability difference between the main part and substitutes?

A: The 501HCAM032768DAG specifies ±20ppm stability. The SIT1533 provides +100ppm (asymmetrical), while the ASDK1 provides ±25ppm. Applications requiring the original ±20ppm specification must evaluate whether the substitute's stability range meets system timing requirements. Real-time clock applications typically tolerate ±25ppm or broader specifications.

Q: Why does the ASDK1 specify a fixed 2.5V supply voltage instead of a range?

A: The ASDK1 is a crystal-based oscillator with a fixed operating voltage. Applications using the 501HCAM032768DAG across its full 1.7V ~ 3.6V range must verify that system design operates at or near 2.5V when using this substitute.

Q: Are there functional differences between Enable/Disable and non-Enable/Disable versions?

A: The SIT1533 does not specify Enable/Disable functionality in the provided parameters. Applications requiring dynamic oscillator shutdown must use the ASDK1-32.768KHZ-LRT, which retains this capability.

Q: What does MSL 2 (1 Year) versus MSL 1 (Unlimited) mean for component handling?

A: MSL 2 with 1-year shelf life requires moisture baking before reflow if the component has exceeded 12 months of storage. MSL 1 with unlimited shelf life eliminates this requirement, reducing manufacturing process complexity and risk.

Q: Are both substitutes suitable for battery-powered applications?

A: The SIT1533 with 1.4µA supply current is optimal for ultra-low-power designs. The ASDK1 with 2.5mA is suitable for applications where moderate current consumption is acceptable. The original part's 4.9mA current is higher than both substitutes.