MIC705M Equivalent & Substitute Parts

Part Overview

The MIC705M is a single-channel power management supervisor integrated circuit manufactured by Microchip Technology in an 8-SOIC surface mount package. This device functions as a reset/power-on reset supervisor with active-low output and a 4.65V voltage threshold. The MIC705M is currently discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design requirements and production continuity. Alternative supervisor ICs with matching electrical and mechanical specifications are available from multiple manufacturers including Analog Devices Inc., Maxim Integrated, MaxLinear, STMicroelectronics, and Texas Instruments.

Key Parameters

Parameter	MIC705M Specification
Manufacturer	Microchip Technology
Category	Power Management (PMIC)
Type	Simple Reset/Power-On Reset
Number of Voltages Monitored	1
Voltage Threshold	4.65V
Reset Output	Active Low
Reset Timeout	140ms Minimum
Operating Temperature Range	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	8-SOIC (0.154", 3.90mm Width)
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the MIC705M is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

Package type: 8-SOIC (0.154", 3.90mm Width)
Mounting type: Surface Mount
Functional type: Simple Reset/Power-On Reset supervisor
Number of monitored voltages: 1 channel
Reset polarity: Active Low
Voltage threshold: 4.65V (±tolerance)
Reset timeout: 140ms minimum
Operating temperature range: -40°C ~ 85°C
Moisture sensitivity level: 1 (Unlimited)

Substitute parts are grouped into two categories based on output configuration:

Category A - Open Drain/Standard Output: Parts with unspecified or standard output configuration matching the original MIC705M output characteristics. These include MIC705MY (Microchip Technology) and SP705EN-L/TR (MaxLinear, Inc.).

Category B - Push-Pull/Totem Pole Output: Parts with active push-pull or totem pole output stages. These include ADM705ARZ, ADM706ARZ-REEL, MAX705CSA+, MAX705CSA+T, STM705M6F, TPS3705-50D, and TPS3705-50DR. These parts provide enhanced output drive capability while maintaining functional equivalence for reset supervision.

Parts with voltage thresholds within the 4.55V to 4.65V range and reset timeouts of 140ms to 160ms are considered functionally equivalent for standard supervisor applications.

Parameter Comparison

Part Number	Manufacturer	Voltage Threshold	Output Type	Reset Timeout	Operating Temp	Package	Product Status	RoHS Status
MIC705M	Microchip Technology	4.65V	Standard	140ms Min	-40°C ~ 85°C	8-SOIC	Discontinued	Non-compliant
MIC705MY	Microchip Technology	4.65V	Standard	140ms Min	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
ADM705ARZ	Analog Devices Inc.	4.65V	Push-Pull, Totem Pole	160ms Min	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
ADM706ARZ-REEL	Analog Devices Inc.	4.4V	Push-Pull, Totem Pole	160ms Min	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
MAX705CSA+	Analog Devices Inc./Maxim Integrated	4.65V	Push-Pull, Totem Pole	140ms Min	0°C ~ 70°C	8-SOIC	Active	ROHS3 Compliant
MAX705CSA+T	Analog Devices Inc./Maxim Integrated	4.65V	Push-Pull, Totem Pole	140ms Min	0°C ~ 70°C	8-SOIC	Active	ROHS3 Compliant
SP705EN-L/TR	MaxLinear, Inc.	4.65V	Standard	140ms Min	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
STM705M6F	STMicroelectronics	4.63V	Push-Pull, Totem Pole	140ms Min	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
TPS3705-50D	Texas Instruments	4.55V	Push-Pull, Totem Pole	140ms Min	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
TPS3705-50DR	Texas Instruments	4.55V	Push-Pull, Totem Pole	140ms Min	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation - Direct Microchip Replacement: MIC705MY is the direct successor to the discontinued MIC705M from Microchip Technology. This part maintains identical electrical specifications including 4.65V threshold, 140ms reset timeout, and -40°C to 85°C operating range. MIC705MY is ROHS3 compliant and currently in active production status, making it the preferred choice for designs requiring minimal qualification effort.

Extended Temperature Range Requirement: For applications requiring the full -40°C to 85°C operating temperature range, the following parts are suitable: MIC705MY, ADM705ARZ, ADM706ARZ-REEL, SP705EN-L/TR, STM705M6F, TPS3705-50D, and TPS3705-50DR. All of these parts are ROHS3 compliant and in active production.

Limited Temperature Range Applications: MAX705CSA+ and MAX705CSA+T operate over a reduced temperature range of 0°C to 70°C. These parts are suitable only for applications that do not require extended low-temperature operation below 0°C or high-temperature operation above 70°C.

Output Drive Capability Consideration: Parts with push-pull or totem pole output stages (ADM705ARZ, ADM706ARZ-REEL, MAX705CSA+, MAX705CSA+T, STM705M6F, TPS3705-50D, TPS3705-50DR) provide higher output current capability compared to standard output configurations. These parts are suitable for applications requiring robust reset signal distribution to multiple downstream circuits.

Voltage Threshold Tolerance: All substitute parts maintain voltage thresholds within the 4.55V to 4.65V range, with most at exactly 4.65V. ADM706ARZ-REEL operates at 4.4V and TPS3705-50D/TPS3705-50DR operate at 4.55V. Verify threshold specifications against system power supply requirements before selection.

Compliance and Certification: All substitute parts listed are ROHS3 compliant and REACH unaffected. The original MIC705M is RoHS non-compliant. Selection of any substitute part provides improved environmental compliance for new designs and production runs.

Frequently Asked Questions (FAQ)

Q: Can MIC705MY be used as a direct replacement for MIC705M? A: Yes. MIC705MY is the active production equivalent of the discontinued MIC705M. Both parts share identical electrical specifications: 4.65V threshold, 140ms reset timeout, active-low reset output, and -40°C to 85°C operating temperature range. The primary difference is packaging format (Tube vs. Bulk) and RoHS compliance status (ROHS3 Compliant vs. Non-compliant).

Q: What is the difference between standard output and push-pull/totem pole output in supervisor ICs? A: Standard output supervisor ICs typically use open-drain or open-collector output stages, requiring external pull-up resistors for proper operation. Push-pull or totem pole output stages provide active high and low drive capability, delivering higher output current and faster signal transitions without external pull-up components. Both configurations are functionally equivalent for reset supervision; output stage selection depends on downstream circuit requirements.

Q: Are parts with different voltage thresholds (4.55V, 4.63V, 4.65V) interchangeable? A: Voltage threshold differences within the 4.55V to 4.65V range represent normal manufacturing tolerance variations across different manufacturers. Parts are interchangeable if the system power supply voltage and reset threshold requirements fall within the specified threshold range. Verify that the selected part's threshold specification meets the specific application requirements before implementation.

Q: Why do some substitute parts have longer reset timeouts (160ms vs. 140ms)? A: Reset timeout specifications define the minimum duration the reset output remains asserted after power supply stabilization. Parts with 160ms timeouts (ADM705ARZ, ADM706ARZ-REEL) provide extended reset assertion compared to 140ms parts. Both are functionally equivalent for standard supervisor applications. Extended timeout specifications provide additional margin for downstream circuit initialization in applications with slower startup requirements.

Q: Can MAX705CSA+ be used in applications requiring -40°C operation? A: No. MAX705CSA+ and MAX705CSA+T operate over a limited temperature range of 0°C to 70°C. These parts are not suitable for applications requiring operation below 0°C. For extended temperature range requirements including -40°C operation, select from: MIC705MY, ADM705ARZ, ADM706ARZ-REEL, SP705EN-L/TR, STM705M6F, TPS3705-50D, or TPS3705-50DR.

Q: What packaging options are available for substitute parts? A: Substitute parts are available in multiple packaging formats: Tube (standard reel packaging), Cut Tape (CT) & Digi-Reel® (individual component tape), and Tape & Reel (TR) (full reel format). Packaging selection depends on production volume and assembly process requirements. All packaging formats contain identical die and electrical specifications; differences are limited to delivery format and quantity per package.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All substitute parts listed are ROHS3 compliant. The original MIC705M is RoHS non-compliant. Selection of any substitute part provides improved environmental compliance for new designs and production runs subject to RoHS regulations.

Q: Which substitute part has the lowest voltage threshold? A: ADM706ARZ-REEL operates at a 4.4V voltage threshold, the lowest among all listed substitute parts. This part is suitable for applications with lower power supply voltages. All other substitute parts operate at thresholds between 4.55V and 4.65V.

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