MAX708CSA Equivalent & Substitute Parts

Part Overview

The MAX708CSA is a single-channel power supply supervisor IC manufactured by Analog Devices Inc./Maxim Integrated, designed for power-on reset and simple reset applications. This component operates as a push-pull output supervisor with a 4.4V voltage threshold and 140ms minimum reset timeout. The MAX708CSA is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations. Substitute parts must maintain functional equivalence across voltage monitoring, output configuration, reset behavior, and package specifications.

Key Parameters

Parameter	MAX708CSA
Manufacturer	Analog Devices Inc./Maxim Integrated
Category	Power Management (PMIC)
Type	Simple Reset/Power-On Reset
Number of Voltages Monitored	1
Voltage Threshold	4.4V
Output Configuration	Push-Pull
Reset Logic	Active High/Active Low
Reset Timeout	140ms Minimum
Operating Temperature Range	0°C ~ 70°C (TA)
Package/Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	RoHS Non-Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the MAX708CSA is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

Single-channel voltage monitoring capability
4.4V voltage threshold (or functionally equivalent threshold within the ADM708 and MIC708 series)
Push-Pull or compatible output configuration
Active High/Active Low reset logic
8-SOIC package form factor
Surface mount technology
Minimum reset timeout of 140ms or greater
Operating temperature range compatibility

Substitution Categories:

Direct Manufacturer Equivalents (Maxim/Analog Devices): MAX708CSA+ represents the active production equivalent with identical electrical specifications and ROHS3 compliance.
Analog Devices ADM708 Series: ADM708ARZ, ADM708ARZ-REEL, ADM708RARZ, ADM708RARZ-REEL, ADM708SARZ, and ADM708SARZ-REEL maintain push-pull output configuration and single-channel monitoring. These parts differ in voltage threshold (2.63V or 2.93V) and reset timeout (160ms minimum), requiring application-level verification of threshold compatibility.
STMicroelectronics STM708M6F: Maintains 4.38V threshold (functionally equivalent to 4.4V), single-channel monitoring, and 8-SOIC package. Output configuration is totem pole rather than push-pull, requiring circuit-level compatibility assessment.
Microchip Technology MIC708 Series: MIC708MY and MIC708MY-TR provide 4.4V threshold and single-channel monitoring with complementary output configuration, differing from the push-pull topology of the MAX708CSA.

Parameter Comparison

Part Number	Manufacturer	Voltage Threshold	Output Type	Reset Timeout	Operating Temp Range	Package	Product Status	RoHS Status
MAX708CSA	Analog Devices/Maxim	4.4V	Push-Pull	140ms Min	0°C ~ 70°C	8-SOIC	Obsolete	Non-Compliant
MAX708CSA+	Analog Devices/Maxim	4.4V	Push-Pull	140ms Min	0°C ~ 70°C	8-SOIC	Active	ROHS3 Compliant
STM708M6F	STMicroelectronics	4.38V	Totem Pole	140ms Min	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
ADM708ARZ	Analog Devices	4.4V	Push-Pull	160ms Min	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
ADM708ARZ-REEL	Analog Devices	4.4V	Push-Pull	160ms Min	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
ADM708RARZ	Analog Devices	2.63V	Push-Pull	160ms Min	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
ADM708RARZ-REEL	Analog Devices	2.63V	Push-Pull	160ms Min	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
ADM708SARZ	Analog Devices	2.93V	Push-Pull	160ms Min	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
ADM708SARZ-REEL	Analog Devices	2.93V	Push-Pull	160ms Min	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
MIC708MY	Microchip Technology	4.4V	Complementary	140ms Min	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
MIC708MY-TR	Microchip Technology	4.4V	Complementary	140ms Min	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: MAX708CSA+ is the direct active production equivalent. It maintains identical electrical specifications (4.4V threshold, 140ms reset timeout, push-pull output) and identical package configuration. The transition from RoHS non-compliant to ROHS3 compliant status makes this the preferred choice for new designs and legacy system support.

Secondary Recommendations by Application:

For applications requiring extended operating temperature range (-40°C to 85°C) with matching 4.4V threshold and push-pull output, ADM708ARZ and ADM708ARZ-REEL are suitable. The 160ms minimum reset timeout exceeds the 140ms requirement and does not impact functionality in standard power-on reset applications.

For applications with alternative voltage thresholds, ADM708RARZ/ADM708RARZ-REEL (2.63V) and ADM708SARZ/ADM708SARZ-REEL (2.93V) provide active production alternatives within the Analog Devices supervisor IC portfolio, provided circuit design accommodates the different threshold values.

STM708M6F offers functional equivalence with 4.38V threshold and extended temperature range. The totem pole output configuration differs from push-pull topology and requires circuit-level compatibility assessment before implementation.

MIC708MY and MIC708MY-TR provide 4.4V threshold matching with complementary output configuration. The output topology difference necessitates application-specific evaluation.

All recommended substitutes maintain single-channel monitoring, 8-SOIC package form factor, surface mount technology, and active product status with ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can MAX708CSA be directly replaced with MAX708CSA+?

A: Yes. MAX708CSA+ is the direct active production equivalent with identical electrical specifications and package configuration. The only difference is product status (active vs. obsolete) and RoHS compliance (ROHS3 vs. non-compliant).

Q: What is the difference between push-pull and totem pole output configurations?

A: Push-pull output uses complementary transistor pairs for both high and low output states. Totem pole output uses a similar configuration. Both are capable of sourcing and sinking current. Circuit compatibility depends on load impedance and output current requirements specified in the application schematic.

Q: Can ADM708RARZ or ADM708SARZ substitute for MAX708CSA?

A: These parts maintain push-pull output, single-channel monitoring, and 8-SOIC package. However, voltage thresholds differ (2.63V and 2.93V respectively versus 4.4V). Substitution is only valid if the application circuit can function with the lower threshold voltage.

Q: What is the significance of packaging options (Tube, Cut Tape, Digi-Reel)?

A: Packaging affects supply chain logistics and automated assembly processes. Tube packaging suits lower-volume applications. Cut Tape and Digi-Reel packaging support high-volume automated pick-and-place assembly. Electrical specifications remain identical across packaging variants.

Q: Why does MIC708MY have complementary output instead of push-pull?

A: Complementary output configuration is a design choice by Microchip Technology. Both configurations provide source and sink capability. Application compatibility depends on circuit design and load characteristics.

Q: Is operating temperature range a critical substitution parameter?

A: Operating temperature range affects component reliability in specific environmental conditions. MAX708CSA operates 0°C to 70°C. Most substitutes operate -40°C to 85°C, providing broader environmental capability. Substitution is valid if the application operates within the substitute part's temperature range.

Q: What does ROHS3 compliance mean for substitution?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements. MAX708CSA is non-compliant; all active substitutes are ROHS3 compliant. This is relevant for applications subject to environmental regulations or customer requirements.

Q: Can I use STM708M6F as a direct replacement?

A: STM708M6F maintains 4.38V threshold (functionally equivalent to 4.4V), single-channel monitoring, and 8-SOIC package. The totem pole output differs from push-pull topology. Substitution requires circuit-level compatibility assessment of output stage impedance and load characteristics.

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