MIC705N Equivalent & Substitute Parts

Part Overview

The MIC705N is a single-channel power supply supervisor IC manufactured by Microchip Technology, housed in an 8-DIP package. This device monitors a single voltage rail and provides active-low reset output with a 140ms minimum reset timeout. The MIC705N is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain functional equivalence in voltage monitoring, reset behavior, and package form factor while meeting current compliance standards.

Key Parameters

Parameter	Value
Manufacturer Part Number	MIC705N
Manufacturer	Microchip Technology
Category	Power Management (PMIC)
Package / Case	8-DIP (0.300", 7.62mm)
Type	Simple Reset/Power-On Reset
Number of Voltages Monitored	1
Voltage - Threshold	4.65V
Reset	Active Low
Reset Timeout	140ms Minimum
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Through Hole
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitute parts for the MIC705N are selected based on strict electrical and mechanical compatibility criteria. The following parameters determine substitution eligibility:

Critical Matching Parameters:

Single voltage channel monitoring capability
4.65V voltage threshold
Active-low reset output
8-DIP through-hole package (0.300", 7.62mm)
Reset timeout of 140ms minimum or greater
Operating temperature range of -40°C to 85°C or wider

Substitution Logic: All identified substitute parts (ADM705ANZ, MAX705CPA+, MAX705EPA+) meet these core electrical requirements. The ADM705ANZ and MAX705EPA+ support the full -40°C to 85°C temperature range. The MAX705CPA+ operates within a narrower 0°C to 70°C range but maintains all other critical parameters. Output stage differences (Push-Pull/Totem Pole vs. unspecified) do not preclude substitution when reset logic remains active-low and functionally equivalent.

Parameter Comparison

Parameter	MIC705N	ADM705ANZ	MAX705CPA+	MAX705EPA+
Manufacturer	Microchip Technology	Analog Devices Inc.	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Package / Case	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)
Type	Simple Reset/Power-On Reset	Simple Reset/Power-On Reset	Simple Reset/Power-On Reset	Simple Reset/Power-On Reset
Number of Voltages Monitored	1	1	1	1
Voltage - Threshold	4.65V	4.65V	4.65V	4.65V
Reset	Active Low	Active Low	Active Low	Active Low
Reset Timeout	140ms Minimum	160ms Minimum	140ms Minimum	140ms Minimum
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	0°C ~ 70°C (TA)	-40°C ~ 85°C (TA)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Product Status	Obsolete	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: MAX705EPA+ The MAX705EPA+ is the preferred substitute for the MIC705N. It maintains identical electrical specifications (4.65V threshold, 140ms reset timeout, -40°C to 85°C operating range) and is ROHS3 compliant. This part offers the highest inventory availability (22,172 units) and active product status, ensuring long-term supply continuity.

Secondary Recommendation: ADM705ANZ The ADM705ANZ provides full temperature range coverage (-40°C to 85°C) and ROHS3 compliance. The 160ms reset timeout exceeds the MIC705N minimum requirement and presents no functional limitation. This part is suitable for applications where Analog Devices sourcing is preferred.

Conditional Recommendation: MAX705CPA+ The MAX705CPA+ is functionally equivalent within its operating temperature range (0°C to 70°C). This part is appropriate only for applications that do not require extended low-temperature operation below 0°C. ROHS3 compliance and active product status support its use in new designs with appropriate thermal constraints.

All three substitute parts are ROHS3 compliant, addressing the non-compliance status of the obsolete MIC705N and meeting current regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the MAX705CPA+ replace the MIC705N in all applications? A: The MAX705CPA+ is functionally equivalent for applications operating within 0°C to 70°C. Applications requiring operation below 0°C must use ADM705ANZ or MAX705EPA+, which support the full -40°C to 85°C range.

Q: What is the significance of the 160ms reset timeout on the ADM705ANZ versus 140ms on other parts? A: The ADM705ANZ exceeds the MIC705N minimum reset timeout specification. A longer timeout does not compromise functionality and is acceptable for direct substitution.

Q: Are all substitute parts pin-compatible with the MIC705N? A: All substitute parts use the 8-DIP (0.300", 7.62mm) through-hole package. Pin compatibility must be verified against specific application schematics and PCB layouts, as package form factor alone does not guarantee functional pin assignment equivalence.

Q: Why is RoHS compliance important for this substitution? A: The MIC705N is RoHS non-compliant. All substitute parts (ADM705ANZ, MAX705CPA+, MAX705EPA+) are ROHS3 compliant, meeting current regulatory and procurement standards for new designs and production.

Q: Which substitute part has the best long-term availability? A: The MAX705EPA+ has the highest current inventory (22,172 units) and active product status, providing the strongest supply assurance for ongoing production requirements.

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