MAX690SCSA-T Equivalent & Substitute Parts

Part Overview

The MAX690SCSA-T is a single-channel power supply supervisor IC manufactured by Analog Devices Inc./Maxim Integrated, designed for battery backup circuit applications. This component operates as a push-pull, totem pole output supervisor with active-low reset functionality. The part is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	MAX690SCSA-T
Manufacturer	Analog Devices Inc./Maxim Integrated
Category	Power Management (PMIC)
Package / Case	8-SOIC (0.154", 3.90mm Width)
Type	Battery Backup Circuit
Number of Voltages Monitored	1
Voltage - Threshold	2.925V
Output Type	Push-Pull, Totem Pole
Reset	Active Low
Reset Timeout	140ms Minimum
Operating Temperature	0°C ~ 70°C (TA)
Mounting Type	Surface Mount
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the MAX690SCSA-T is determined by the following critical parameters:

Mechanical Compatibility: All substitute parts must use the 8-SOIC package format (0.154", 3.90mm Width) to ensure PCB footprint compatibility and surface mount assembly without redesign.

Functional Parameters: Substitute parts must maintain single-channel voltage monitoring with push-pull, totem pole output configuration and active-low reset functionality to preserve circuit behavior.

Electrical Specifications: The voltage threshold (2.925V), reset timeout (140ms minimum), and output type are primary determinants of functional equivalence. Parts with identical or compatible specifications can replace the original component.

Environmental & Compliance: While the original part is RoHS non-compliant and rated for 0°C ~ 70°C operation, substitute parts with ROHS3 compliance and extended temperature ranges (-40°C ~ 85°C) provide improved regulatory alignment and operational flexibility.

Substitutes are categorized as:

Direct Substitutes: Identical part number with different packaging (MAX690SCSA+T)
Parametric Equivalents: Same base functionality with identical electrical specifications (MAX704SCSA+T, MAX806SCSA+T)
Manufacturer Recommended Alternatives: Parts with compatible specifications but different voltage thresholds or temperature ranges (ADM690AARNZ, ADM802LARNZ, LTC690CS8#PBF)

Parameter Comparison

Part Number	Manufacturer	Package	Voltage Threshold	Output Type	Reset Timeout	Operating Temp	RoHS Status	Product Status
MAX690SCSA-T	Analog Devices Inc./Maxim Integrated	8-SOIC	2.925V	Push-Pull, Totem Pole	140ms Min	0°C ~ 70°C	RoHS non-compliant	Obsolete
MAX690SCSA+T	Analog Devices Inc./Maxim Integrated	8-SOIC	2.925V	Push-Pull, Totem Pole	140ms Min	0°C ~ 70°C	ROHS3 Compliant	Active
MAX704SCSA+T	Analog Devices Inc./Maxim Integrated	8-SOIC	2.925V	Push-Pull, Totem Pole	140ms Min	0°C ~ 70°C	ROHS3 Compliant	Active
MAX806SCSA+T	Analog Devices Inc./Maxim Integrated	8-SOIC	2.925V	Push-Pull, Totem Pole	140ms Min	0°C ~ 70°C	ROHS3 Compliant	Active
ADM690AARNZ	Analog Devices Inc.	8-SOIC	4.65V	Push-Pull, Totem Pole	140ms Min	-40°C ~ 85°C	ROHS3 Compliant	Active
ADM690AARNZ-REEL	Analog Devices Inc.	8-SOIC	4.65V	Push-Pull, Totem Pole	140ms Min	-40°C ~ 85°C	ROHS3 Compliant	Active
ADM802LARNZ	Analog Devices Inc.	8-SOIC	4.65V	Push-Pull, Totem Pole	140ms Min	-40°C ~ 85°C	ROHS3 Compliant	Active
ADM802LARNZ-REEL	Analog Devices Inc.	8-SOIC	4.65V	Push-Pull, Totem Pole	140ms Min	-40°C ~ 85°C	ROHS3 Compliant	Active
ADM8690ARNZ	Analog Devices Inc.	8-SOIC	4.65V	Push-Pull, Totem Pole	35ms Min	-40°C ~ 85°C	ROHS3 Compliant	Active
LTC690CS8#PBF	Analog Devices Inc.	8-SOIC	4.65V	Open Drain or Open Collector	35ms Min	0°C ~ 70°C	ROHS3 Compliant	Active
LTC690CS8#TRPBF	Analog Devices Inc.	8-SOIC	4.65V	Open Drain or Open Collector	35ms Min	0°C ~ 70°C	ROHS3 Compliant	Active

Engineering Selection Recommendations

Direct Replacement (Preferred): MAX690SCSA+T is the primary substitute for MAX690SCSA-T. This part maintains identical electrical specifications and package format while offering ROHS3 compliance and active product status. The transition from tape & reel packaging to the original tube packaging does not affect functional compatibility.

Parametric Equivalents: MAX704SCSA+T and MAX806SCSA+T provide identical electrical and mechanical specifications to the original part with improved compliance status. These parts are suitable for applications where the 2.925V threshold and 140ms reset timeout are required.

Extended Temperature Range Alternatives: ADM690AARNZ, ADM690AARNZ-REEL, ADM802LARNZ, and ADM802LARNZ-REEL offer expanded operating temperature ranges (-40°C ~ 85°C) compared to the original 0°C ~ 70°C specification. These parts are applicable in designs requiring enhanced thermal performance. Note that these parts feature a 4.65V voltage threshold, which differs from the original 2.925V specification and must be evaluated for circuit compatibility.

Output Configuration Consideration: LTC690CS8#PBF and LTC690CS8#TRPBF employ open-drain or open-collector output configuration rather than push-pull, totem pole output. These parts are suitable only for applications where the output topology change does not compromise circuit function. The 4.65V threshold and 35ms reset timeout also differ from the original specification.

Faster Reset Timeout Option: ADM8690ARNZ provides a 35ms minimum reset timeout compared to the original 140ms specification, suitable for applications requiring faster reset response. This part features a 4.65V threshold and extended temperature range.

All substitute parts maintain single-channel voltage monitoring, active-low reset functionality, and 8-SOIC package compatibility with the original component.

Frequently Asked Questions (FAQ)

Q: Can MAX690SCSA+T directly replace MAX690SCSA-T without circuit modification?

A: Yes. MAX690SCSA+T maintains identical electrical specifications (2.925V threshold, 140ms reset timeout, push-pull totem pole output) and 8-SOIC package format. The only difference is packaging format (tape & reel versus tube) and improved RoHS compliance. No circuit redesign is required.

Q: What is the primary difference between MAX690SCSA+T and ADM690AARNZ?

A: The voltage threshold differs: MAX690SCSA+T operates at 2.925V while ADM690AARNZ operates at 4.65V. Both maintain 140ms reset timeout and push-pull output configuration. Selection depends on the specific voltage monitoring requirement of your application.

Q: Why do some substitute parts have different reset timeout values?

A: Reset timeout is a design parameter that varies across product families. ADM8690ARNZ and LTC690CS8 series feature 35ms minimum reset timeout compared to the original 140ms. This affects the duration of the reset pulse and must be evaluated for compatibility with downstream circuitry.

Q: Can LTC690CS8#PBF replace MAX690SCSA-T in all applications?

A: LTC690CS8#PBF uses open-drain or open-collector output instead of push-pull, totem pole output. This output topology difference may affect circuit behavior depending on pull-up resistor configuration and load characteristics. Verify output stage compatibility before substitution.

Q: What is the advantage of ADM690AARNZ-REEL over ADM690AARNZ?

A: Both parts are electrically identical. ADM690AARNZ-REEL is supplied in cut tape and Digi-Reel packaging format, while ADM690AARNZ is supplied in tube packaging. Selection depends on assembly process requirements and inventory management preferences.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts listed are ROHS3 compliant. The original MAX690SCSA-T is RoHS non-compliant. If regulatory compliance is required, any of the listed substitutes provide improved environmental standards.

Q: Do substitute parts with extended temperature ranges (-40°C ~ 85°C) affect circuit performance?

A: Extended temperature range capability does not degrade performance within the original operating range (0°C ~ 70°C). These parts are suitable for applications requiring broader thermal operation without functional compromise.

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