MAX690ACSA-T Equivalent & Substitute Parts

Part Overview

The MAX690ACSA-T is a single-channel power supply supervisor IC manufactured by Analog Devices Inc./Maxim Integrated, designed for battery backup circuit applications. This component monitors a single voltage threshold and provides push-pull, totem pole output with active-low reset functionality. The part is currently obsolete, with 680 units available in new original stock. Due to its discontinued status, equivalent and substitute parts from active product lines are necessary for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Manufacturer	Analog Devices Inc./Maxim Integrated
Category	Power Management (PMIC)
Type	Battery Backup Circuit
Number of Voltages Monitored	1
Voltage Threshold	4.65V
Output Type	Push-Pull, Totem Pole
Reset Logic	Active Low
Reset Timeout	140ms Minimum
Operating Temperature	0°C ~ 70°C (TA)
Package Type	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the MAX690ACSA-T is determined by strict equivalence across the following critical parameters:

Single voltage monitoring channel
4.65V voltage threshold
Push-pull, totem pole output configuration
Active-low reset logic
140ms minimum reset timeout
8-SOIC package footprint
Surface mount technology
ROHS3 compliance and MSL 1 rating

Substitute parts are grouped into two categories:

Direct Manufacturer Equivalents (Same Base Model, Different Packaging): MAX690ACSA+T maintains identical electrical specifications with alternative packaging options (Cut Tape & Digi-Reel).

Parametric Equivalents (Different Base Model, Matching Specifications): MAX703CSA+T and MAX802LCSA+T provide identical electrical performance with the same package and threshold specifications.

Manufacturer Recommended Alternatives (Extended Temperature Range): ADM690AARNZ, ADM690AARNZ-REEL, ADM802LARNZ, ADM802LARNZ-REEL, and ADM8690ARNZ offer active product status with extended operating temperature ranges (-40°C ~ 85°C) while maintaining core electrical parameters.

Output Configuration Variant: LTC690CS8#PBF and LTC690CS8#TRPBF feature open drain or open collector output instead of push-pull totem pole, with 35ms reset timeout instead of 140ms, representing a functional alternative for applications where output configuration differs.

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage Threshold	Output Type	Reset Timeout	Operating Temperature	Package	Packaging Option	Inventory (Pcs)
MAX690ACSA-T	Analog Devices Inc./Maxim Integrated	Obsolete	4.65V	Push-Pull, Totem Pole	140ms Min	0°C ~ 70°C	8-SOIC	Standard	680
MAX690ACSA+T	Analog Devices Inc./Maxim Integrated	Active	4.65V	Push-Pull, Totem Pole	140ms Min	0°C ~ 70°C	8-SOIC	Cut Tape & Digi-Reel	28599
MAX703CSA+T	Analog Devices Inc./Maxim Integrated	Active	4.65V	Push-Pull, Totem Pole	140ms Min	0°C ~ 70°C	8-SOIC	Tape & Reel	1219
MAX802LCSA+T	Analog Devices Inc./Maxim Integrated	Active	4.65V	Push-Pull, Totem Pole	140ms Min	0°C ~ 70°C	8-SOIC	Tape & Reel	876
ADM690AARNZ	Analog Devices Inc.	Active	4.65V	Push-Pull, Totem Pole	140ms Min	-40°C ~ 85°C	8-SOIC	Tube	1435
ADM690AARNZ-REEL	Analog Devices Inc.	Active	4.65V	Push-Pull, Totem Pole	140ms Min	-40°C ~ 85°C	8-SOIC	Cut Tape & Digi-Reel	10300
ADM802LARNZ	Analog Devices Inc.	Active	4.65V	Push-Pull, Totem Pole	140ms Min	-40°C ~ 85°C	8-SOIC	Tube	50100
ADM802LARNZ-REEL	Analog Devices Inc.	Active	4.65V	Push-Pull, Totem Pole	140ms Min	-40°C ~ 85°C	8-SOIC	Tape & Reel	980
ADM8690ARNZ	Analog Devices Inc.	Active	4.65V	Push-Pull, Totem Pole	35ms Min	-40°C ~ 85°C	8-SOIC	Tube	2200
LTC690CS8#PBF	Analog Devices Inc.	Active	4.65V	Open Drain or Open Collector	35ms Min	0°C ~ 70°C	8-SOIC	Tube	1845
LTC690CS8#TRPBF	Analog Devices Inc.	Active	4.65V	Open Drain or Open Collector	35ms Min	0°C ~ 70°C	8-SOIC	Tape & Reel	2013

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance): Select MAX690ACSA+T as the primary substitute. This part maintains 100% electrical equivalence with the obsolete MAX690ACSA-T while offering active product status and significantly higher inventory availability (28599 units). The part is ROHS3 compliant with MSL 1 rating, matching the original specification.

For Parametric Equivalence with Active Status: MAX703CSA+T and MAX802LCSA+T are functionally equivalent alternatives with identical electrical specifications and package footprint. Both maintain active product status and ROHS3 compliance. Selection between these options depends on packaging preference and inventory requirements.

For Extended Temperature Range Applications: ADM690AARNZ, ADM690AARNZ-REEL, ADM802LARNZ, and ADM802LARNZ-REEL extend the operating temperature range to -40°C ~ 85°C while preserving all core electrical parameters. These parts are manufacturer-recommended alternatives with active status and high inventory availability. ADM802LARNZ offers the largest stock (50100 units).

For Reduced Reset Timeout Requirements: ADM8690ARNZ provides a 35ms minimum reset timeout instead of 140ms, suitable for applications requiring faster reset response. This part maintains all other electrical specifications and offers active product status with extended temperature range.

For Output Configuration Variants: LTC690CS8#PBF and LTC690CS8#TRPBF feature open drain or open collector output configuration instead of push-pull totem pole. These parts are suitable only for applications where the output configuration change is compatible with circuit design. Both maintain 4.65V threshold and active product status.

Frequently Asked Questions (FAQ)

Q: Can MAX690ACSA+T be used as a direct replacement for MAX690ACSA-T?

A: Yes. MAX690ACSA+T is electrically identical to the obsolete MAX690ACSA-T, with matching voltage threshold (4.65V), output configuration (push-pull totem pole), reset logic (active low), and reset timeout (140ms minimum). The primary difference is packaging option (Cut Tape & Digi-Reel vs. standard) and active product status. Both are ROHS3 compliant with MSL 1 rating.

Q: What is the difference between MAX703CSA+T and MAX802LCSA+T?

A: Both parts are parametric equivalents with identical electrical specifications to the MAX690ACSA-T. The difference lies in the base product model number (MAX703 vs. MAX802), though all three maintain the same voltage threshold, output type, reset characteristics, and 8-SOIC package. Selection depends on availability and packaging preference.

Q: Why would I choose ADM690AARNZ over MAX690ACSA+T?

A: ADM690AARNZ extends the operating temperature range from 0°C ~ 70°C to -40°C ~ 85°C, making it suitable for industrial and automotive applications requiring wider temperature operation. All core electrical parameters remain identical. This part is manufacturer-recommended and maintains active product status.

Q: What is the significance of the reset timeout difference in ADM8690ARNZ?

A: ADM8690ARNZ features a 35ms minimum reset timeout compared to 140ms in the original MAX690ACSA-T. This faster reset response is suitable for applications requiring quicker system recovery. All other electrical specifications remain equivalent. This part is not a direct replacement but a functional alternative for specific timing requirements.

Q: Can LTC690CS8#PBF replace MAX690ACSA-T?

A: LTC690CS8#PBF maintains the 4.65V voltage threshold and active-low reset logic but differs in output configuration (open drain or open collector vs. push-pull totem pole) and reset timeout (35ms vs. 140ms). This part is a functional alternative only for applications where the output configuration change is compatible with circuit design.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the original MAX690ACSA-T specification.

Q: What packaging options are available for these supervisor ICs?

A: Packaging options include Tube, Cut Tape & Digi-Reel, and Tape & Reel. All parts use the 8-SOIC (0.154", 3.90mm Width) package footprint. Selection depends on production volume and assembly process requirements.

Q: Which substitute part offers the highest inventory availability?

A: ADM802LARNZ offers the highest inventory with 50100 units in stock, followed by ADM690AARNZ-REEL with 10300 units. Both maintain active product status and extended temperature range operation.

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