MIC803-31D4VC3-TR Equivalent & Substitute Parts

Part Overview

The MIC803-31D4VC3-TR is a power management integrated circuit (PMIC) supervisor manufactured by Microchip Technology. This device functions as a single-channel reset/power-on reset supervisor with open drain or open collector output, housed in an SC-70 surface mount package. The part is currently in active production status with 832 units available in stock. Equivalent and substitute parts are identified to provide design flexibility, supply chain alternatives, and application-specific options while maintaining functional compatibility within the specified electrical and mechanical parameters.

Substiute Parts

MIC803-31D4VC3-TR

Microchip TechnologyIn Stock: 927MIC803-31D4VC3-TR Datasheet

Current PartRFQ

MAX803SEXR/V+T

Analog Devices Inc./Maxim IntegratedIn Stock: 7830MAX803SEXR/V+T Datasheet

MFR RecommendedRFQ

MAX803TEXR/V+T

Analog Devices Inc./Maxim IntegratedIn Stock: 894MAX803TEXR/V+T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MIC803-31D4VC3-TR are identified based on strict alignment with the following critical parameters:

• Package Compatibility: All substitutes must use SC-70 / SOT-323 surface mount packaging to ensure PCB footprint compatibility
• Functional Type: All substitutes must be single-channel reset/power-on reset supervisors with open drain or open collector output
• Reset Logic: All substitutes must maintain active low reset configuration
• Voltage Threshold: Substitutes are grouped by voltage threshold value (3.08V threshold matches the main part)
• Output Configuration: All substitutes must provide open drain or open collector output
• Compliance: All substitutes must maintain ROHS3 compliance and MSL 1 rating
• Temperature Range: All substitutes must support -40°C ~ 125°C operating temperature range

The identified substitutes (MAX803SEXR/V+T and MAX803TEXR/V+T) meet these core requirements. Differences in reset timeout and temperature measurement point (TA vs TJ) do not affect functional substitution within the specified parameter set.

Parameter Comparison

Engineering Selection Recommendations

MIC803-31D4VC3-TR (Primary Part) Select this part for standard industrial applications requiring a 3.08V threshold supervisor with extended reset timeout of 1.12s minimum. The part is in active production with adequate inventory (832 units). ROHS3 compliance and MSL 1 rating support standard manufacturing and storage conditions.

MAX803TEXR/V+T (Recommended Substitute) This part provides exact voltage threshold matching (3.08V) to the MIC803-31D4VC3-TR while offering automotive-grade qualification (AEC-Q100). The shorter reset timeout (140ms minimum) may be suitable for applications where faster reset response is acceptable. Automotive qualification provides additional reliability assurance for demanding environments. Inventory availability is 847 units.

MAX803SEXR/V+T (Alternative Substitute) This part offers automotive-grade qualification (AEC-Q100) with a lower voltage threshold (2.93V). Selection of this part requires confirmation that the 2.93V threshold is compatible with the target application voltage monitoring requirements. The 140ms reset timeout aligns with MAX803TEXR/V+T. Inventory availability is 7781 units, providing superior supply chain availability.

All substitute parts maintain ROHS3 compliance, MSL 1 rating, active low reset logic, open drain/open collector output, and SC-70 surface mount packaging required for direct functional substitution.

Frequently Asked Questions (FAQ)

Q: Can MAX803SEXR/V+T be used as a direct replacement for MIC803-31D4VC3-TR? A: MAX803SEXR/V+T is functionally compatible in terms of package, output type, and reset logic. However, the voltage threshold differs (2.93V vs 3.08V). Direct substitution is valid only if the application can operate with the lower threshold voltage. Verify threshold compatibility with your circuit design before implementation.

Q: What is the significance of the reset timeout difference between MIC803-31D4VC3-TR (1.12s) and the MAX803 variants (140ms)? A: Reset timeout defines the minimum duration the reset output remains active after power supply stabilization. The MIC803-31D4VC3-TR provides a longer timeout, which may be required for systems needing extended initialization time. The MAX803 variants provide faster reset response. Select based on your system's initialization requirements.

Q: Are the MAX803 substitutes suitable for automotive applications? A: Yes. Both MAX803SEXR/V+T and MAX803TEXR/V+T carry automotive-grade qualification (AEC-Q100), making them suitable for automotive and other demanding environments. The MIC803-31D4VC3-TR does not specify automotive qualification.

Q: Does the SC-70 / SOT-323 package ensure PCB compatibility between all parts? A: Yes. All listed parts use identical SC-70 / SOT-323 surface mount packaging, ensuring footprint and land pattern compatibility. No PCB redesign is required for package substitution.

Q: What compliance certifications apply to all parts? A: All parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating. All parts are in active production status. The MAX803 variants additionally carry AEC-Q100 automotive qualification.

Q: How do temperature measurement points (TJ vs TA) affect substitution? A: TJ (junction temperature) and TA (ambient temperature) represent different measurement references. Both operating ranges (-40°C ~ 125°C) are equivalent for standard applications. Consult detailed datasheets for thermal management requirements in high-power or thermally constrained designs.