MIC6315-25D4U TR Equivalent & Substitute Parts

Part Overview

The MIC6315-25D4U TR is a single-channel power management supervisor IC manufactured by Microchip Technology, designed for reset and power-on reset applications in embedded systems. This component operates as an open drain or open collector supervisor with a 2.5V threshold voltage and 1.1s minimum reset timeout. The part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. Substitute parts must maintain functional compatibility across voltage monitoring, reset behavior, output type, and operating temperature ranges while meeting current RoHS and REACH compliance requirements.

Key Parameters

Parameter	MIC6315-25D4U TR
Manufacturer	Microchip Technology
Category	Power Management (PMIC)
Type	Simple Reset/Power-On Reset
Number of Voltages Monitored	1
Voltage - Threshold	2.5V
Output	Open Drain or Open Collector
Reset	Active Low
Reset Timeout	1.1s Minimum
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	TO-253-4, TO-253AA
Supplier Device Package	SOT-143
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the MIC6315-25D4U TR is determined by the following critical parameters:

Functional Equivalence Criteria:

Single-channel voltage monitoring capability
Open drain or open collector output configuration
Active low reset signal
Surface mount SOT-143 or SOT-143-4 package compatibility
Operating temperature range support (-40°C minimum to 85°C minimum)
Voltage threshold compatibility or application-specific selection

Compliance Criteria:

RoHS3 compliance status (required for new designs)
REACH unaffected status
MSL 1 rating

Substitute parts are grouped into two categories: direct functional equivalents from Microchip Technology and cross-manufacturer alternatives from Analog Devices Inc./Maxim Integrated. The Microchip MIC6315-25D4UY-TR maintains identical electrical specifications with active product status and RoHS3 compliance. Maxim Integrated MAX6444 and MAX6467 series parts provide functional substitution with varying voltage thresholds and reset timeout characteristics, allowing selection based on specific application requirements.

Parameter Comparison

Part Number	Manufacturer	Voltage Threshold	Reset Timeout	Operating Temp Range	Output Type	Package	RoHS Status	Product Status
MIC6315-25D4U TR	Microchip Technology	2.5V	1.1s Min	-40°C ~ 85°C	Open Drain/Collector	SOT-143	Non-compliant	Obsolete
MIC6315-25D4UY-TR	Microchip Technology	2.5V	1.1s Min	-40°C ~ 85°C	Open Drain/Collector	SOT-143	ROHS3 Compliant	Active
MAX6444US16L+T	Analog Devices Inc./Maxim Integrated	1.575V	140ms Min	-40°C ~ 85°C	Open Drain/Collector	SOT-143-4	ROHS3 Compliant	Active
MAX6444US17L+T	Analog Devices Inc./Maxim Integrated	1.665V	140ms Min	-40°C ~ 85°C	Open Drain/Collector	SOT-143-4	ROHS3 Compliant	Active
MAX6444US23L+T	Analog Devices Inc./Maxim Integrated	2.313V	140ms Min	-40°C ~ 85°C	Open Drain/Collector	SOT-143-4	ROHS3 Compliant	Active
MAX6444US29L+T	Analog Devices Inc./Maxim Integrated	2.925V	140ms Min	-40°C ~ 85°C	Open Drain/Collector	SOT-143-4	ROHS3 Compliant	Active
MAX6444US44L+T	Analog Devices Inc./Maxim Integrated	4.375V	140ms Min	-40°C ~ 85°C	Open Drain/Collector	SOT-143-4	ROHS3 Compliant	Active
MAX6444US46L+T	Analog Devices Inc./Maxim Integrated	4.625V	140ms Min	-40°C ~ 85°C	Open Drain/Collector	SOT-143-4	ROHS3 Compliant	Active
MAX6467US22D3+T	Analog Devices Inc./Maxim Integrated	2.188V	150ms Min	-40°C ~ 125°C	Open Drain/Collector	SOT-143-4	ROHS3 Compliant	Active
MAX6467US26D3+T	Analog Devices Inc./Maxim Integrated	2.625V	150ms Min	-40°C ~ 125°C	Open Drain/Collector	SOT-143-4	ROHS3 Compliant	Active
MAX6467US29D3+T	Analog Devices Inc./Maxim Integrated	2.925V	150ms Min	-40°C ~ 125°C	Open Drain/Collector	SOT-143-4	ROHS3 Compliant	Active
MAX6805US26D3+T	Analog Devices Inc./Maxim Integrated	2.625V	150ms Min	-40°C ~ 125°C	Open Drain/Collector	SOT-143-4	ROHS3 Compliant	Active
MAX6805US46D3+T	Analog Devices Inc./Maxim Integrated	4.625V	150ms Min	-40°C ~ 125°C	Open Drain/Collector	SOT-143-4	ROHS3 Compliant	Active

Engineering Selection Recommendations

Primary Recommendation: MIC6315-25D4UY-TR

The MIC6315-25D4UY-TR is the direct functional equivalent from Microchip Technology. It maintains identical electrical specifications including 2.5V threshold voltage, 1.1s minimum reset timeout, and -40°C to 85°C operating temperature range. This part carries active product status and ROHS3 compliance, making it the preferred choice for designs requiring exact electrical compatibility with the obsolete MIC6315-25D4U TR.

Cross-Manufacturer Alternatives: Maxim Integrated MAX6444 and MAX6467 Series

Maxim Integrated supervisor ICs provide functional substitution with application-specific voltage threshold selection. The MAX6444 series offers reset timeout of 140ms minimum across -40°C to 85°C operating range, while the MAX6467 series extends operating temperature to 125°C with 150ms minimum reset timeout. All Maxim parts feature ROHS3 compliance and active product status.

Voltage threshold selection depends on application requirements:

MAX6444US23L+T and MAX6467US22D3+T provide thresholds near the original 2.5V specification
MAX6467US26D3+T and MAX6805US26D3+T offer 2.625V threshold with extended temperature range
Additional threshold options (1.575V to 4.625V) accommodate diverse power supply monitoring requirements

All substitute parts maintain open drain or open collector output configuration, active low reset signal, and SOT-143-4 package compatibility with the original TO-253-4 and TO-253AA footprint.

Frequently Asked Questions (FAQ)

Q: Can MIC6315-25D4UY-TR be used as a direct replacement for MIC6315-25D4U TR?

A: Yes. The MIC6315-25D4UY-TR is electrically and functionally identical to the MIC6315-25D4U TR, with the same 2.5V threshold voltage, 1.1s reset timeout, and operating temperature range. The primary difference is active product status and ROHS3 compliance. Pin configuration and package footprint are compatible.

Q: What is the difference between MAX6444 and MAX6467 series substitutes?

A: The MAX6467 series extends operating temperature to -40°C to 125°C compared to MAX6444's -40°C to 85°C range. MAX6467 also specifies 150ms minimum reset timeout versus MAX6444's 140ms. Both series provide multiple voltage threshold options and ROHS3 compliance. Selection depends on application temperature requirements.

Q: Are Maxim Integrated parts pin-compatible with the MIC6315-25D4U TR?

A: Yes. All substitute parts use SOT-143-4 package configuration compatible with the original TO-253-4 and TO-253AA footprint. Pin assignments for voltage monitoring input, reset output, VCC, and GND are functionally equivalent across all listed substitutes.

Q: How do voltage threshold differences affect substitution?

A: Voltage threshold determines the supply voltage level at which the supervisor triggers a reset signal. The original MIC6315-25D4U TR monitors 2.5V. Substitute parts with different thresholds (1.575V to 4.625V) are suitable only if the application's power supply voltage and reset trigger requirements match the selected threshold. Verify application schematic requirements before selecting a substitute with different threshold voltage.

Q: What compliance certifications apply to all substitute parts?

A: All active substitute parts listed carry ROHS3 compliance and REACH unaffected status. MSL rating is 1 (Unlimited) for all parts. The original MIC6315-25D4U TR is RoHS non-compliant; substitution with compliant parts is required for new designs and applications with compliance mandates.

Q: Can reset timeout differences between substitutes affect circuit operation?

A: Yes. The original MIC6315-25D4U TR specifies 1.1s minimum reset timeout, while MAX6444 series specifies 140ms and MAX6467 series specifies 150ms. Reset timeout determines how long the reset signal remains active after power supply stabilization. Applications requiring the longer 1.1s timeout must use MIC6315-25D4UY-TR or verify that shorter timeouts are acceptable for the target system.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message