MIC705M-TR Equivalent & Substitute Parts

Part Overview

The MIC705M-TR is a single-channel power supply supervisor IC manufactured by Microchip Technology, housed in an 8-SOIC surface mount package. This device monitors a single voltage rail and provides active-low reset output with a 140ms minimum reset timeout. The MIC705M-TR is discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing production and maintenance applications. Substitute parts must maintain functional equivalence in reset supervision, voltage threshold monitoring, and package compatibility while meeting current RoHS and REACH compliance requirements.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution of the MIC705M-TR is determined by the following critical parameters:

Mandatory Matching Parameters:

Single voltage channel monitoring capability
4.65V voltage threshold (±tolerance acceptable within standard supervisor IC specifications)
Active-low reset output
140ms minimum reset timeout
8-SOIC surface mount package (0.154", 3.90mm Width)
Operating temperature range of -40°C ~ 85°C or wider

Acceptable Variations:

Output type (open-drain vs. push-pull/totem-pole outputs are functionally compatible in reset supervision circuits)
Packaging format (Tape & Reel, Cut Tape, or Tube are all surface mount delivery methods)
RoHS compliance status (modern substitutes are RoHS3 compliant; legacy designs may use RoHS non-compliant parts)

Substitutes Identified: All substitute parts listed maintain the core supervisor functionality with identical or compatible voltage thresholds, reset polarity, and package form factor. Variations in output stage configuration (push-pull vs. open-drain) and operating temperature ranges are noted but do not prevent functional substitution in standard applications.

Parameter Comparison

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

Engineering Selection Recommendations

Direct Replacement (Highest Compatibility): MIC705MY-TR is the primary direct replacement for MIC705M-TR. Both are Microchip Technology products with identical electrical specifications, matching voltage threshold (4.65V), reset timeout (140ms), and operating temperature range (-40°C ~ 85°C). MIC705MY-TR is ROHS3 compliant and currently active in production, making it the preferred choice for new designs and production continuity.

Alternative Substitutes with Functional Equivalence: SP705EN-L/TR (MaxLinear, Inc.) provides identical electrical parameters to the original MIC705M-TR, including 4.65V threshold, 140ms reset timeout, and -40°C ~ 85°C operating range. This part is ROHS3 compliant and available in Tape & Reel packaging.

Substitutes with Minor Parameter Variations: ADM705ARZ and ADM706ARZ-REEL (Analog Devices Inc.) feature push-pull output stages instead of open-drain, with 160ms reset timeout (vs. 140ms). ADM706ARZ-REEL has a 4.4V threshold. These parts are functionally compatible in applications where push-pull output capability is acceptable or beneficial.

MAX705CSA+ and MAX705CSA+T (Analog Devices Inc./Maxim Integrated) match the 4.65V threshold and 140ms reset timeout but operate over a narrower temperature range (0°C ~ 70°C vs. -40°C ~ 85°C). These are suitable only for applications within the 0°C ~ 70°C operating window.

TPS3705-50DR (Texas Instruments) provides 4.55V threshold (within acceptable tolerance of 4.65V), 140ms reset timeout, and full -40°C ~ 85°C operating range with push-pull output.

All substitute parts maintain ROHS3 compliance and are currently in active production status.

Frequently Asked Questions (FAQ)

Q: Can MIC705MY-TR be used as a direct drop-in replacement for MIC705M-TR? A: Yes. MIC705MY-TR is the direct equivalent from Microchip Technology with identical electrical specifications, package, and pinout. The only difference is RoHS compliance status (ROHS3 vs. non-compliant).

Q: What is the difference between open-drain and push-pull output types in supervisor ICs? A: Open-drain outputs require an external pull-up resistor and can only pull the reset line low. Push-pull (totem-pole) outputs actively drive both high and low states. In reset supervision circuits, both output types are functionally compatible; the choice depends on circuit design requirements and pull-up resistor availability.

Q: Can I use ADM705ARZ or TPS3705-50DR if my application requires -40°C ~ 85°C operation? A: ADM705ARZ and TPS3705-50DR both support -40°C ~ 85°C operation. ADM705ARZ has a 160ms reset timeout (vs. 140ms original). TPS3705-50DR has a 4.55V threshold (vs. 4.65V original). Both are functionally compatible for full temperature range applications.

Q: Why is MAX705CSA+ listed as a substitute if it only operates to 70°C? A: MAX705CSA+ is included as a substitute for applications with operating temperature limits of 0°C ~ 70°C. It matches the 4.65V threshold and 140ms reset timeout exactly. For applications requiring full -40°C ~ 85°C operation, this part is not suitable.

Q: Are all substitute parts available in the same packaging formats? A: No. MIC705M-TR and SP705EN-L/TR are available in Tape & Reel (TR). MIC705MY-TR is also available in TR. ADM705ARZ is supplied in Tube. ADM706ARZ-REEL, MAX705CSA+T, and TPS3705-50DR are available in Cut Tape (CT) with Digi-Reel. Verify packaging availability with your supplier for production requirements.

Q: What is the significance of the voltage threshold difference between ADM706ARZ-REEL (4.4V) and the original MIC705M-TR (4.65V)? A: The 4.4V threshold in ADM706ARZ-REEL is lower, meaning the reset will trigger at a lower supply voltage. This part is suitable only if your application can tolerate a lower voltage threshold. For designs requiring 4.65V threshold monitoring, use parts with matching 4.65V specifications.

Q: Are all substitute parts RoHS compliant? A: All substitute parts listed are ROHS3 compliant. The original MIC705M-TR is RoHS non-compliant. If RoHS compliance is required for your application, any of the listed substitutes meet this requirement.

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