MAX690ACSA Equivalent & Substitute Parts

Part Overview

The MAX690ACSA is a Power Management IC (PMIC) supervisor circuit manufactured by Analog Devices Inc./Maxim Integrated. It functions as a battery backup circuit with push-pull, totem pole output configuration, monitoring a single voltage threshold at 4.65V with active low reset and 140ms minimum reset timeout. The device is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	MAX690ACSA
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	4.65V
Output	Push-Pull, Totem Pole
Reset	Active Low
Reset Timeout	140ms Minimum
Operating Temperature	0°C ~ 70°C (TA)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the MAX690ACSA is determined by the following critical parameters:

Electrical Compatibility:

Voltage threshold: 4.65V
Output configuration: Push-Pull, Totem Pole (or functionally equivalent)
Reset polarity: Active Low
Reset timeout: 140ms minimum or faster
Number of monitored voltages: 1 channel

Mechanical Compatibility:

Package: 8-SOIC form factor
Mounting: Surface mount
Pin count and layout: 8-pin SOIC

Environmental & Compliance:

Operating temperature range: 0°C ~ 70°C minimum (extended range acceptable)
RoHS compliance: Preferred for new designs
MSL rating: 1 (Unlimited)

Substitute parts are grouped into three categories:

Direct Manufacturer Equivalents – Same base product with different packaging or compliance status
Parametric Equivalents – Different manufacturer part number with identical electrical specifications
Manufacturer Recommended Alternatives – Functionally compatible parts with extended temperature range or different output topology

Parameter Comparison

Part Number	Manufacturer	Voltage Threshold	Output Type	Reset Timeout	Operating Temp	Package	Product Status	RoHS Status
MAX690ACSA	Analog Devices Inc./Maxim	4.65V	Push-Pull, Totem Pole	140ms Min	0°C ~ 70°C	8-SOIC	Obsolete	Non-compliant
MAX690ACSA+	Analog Devices Inc./Maxim	4.65V	Push-Pull, Totem Pole	140ms Min	0°C ~ 70°C	8-SOIC	Active	ROHS3 Compliant
MAX703CSA+	Analog Devices Inc./Maxim	4.65V	Push-Pull, Totem Pole	140ms Min	0°C ~ 70°C	8-SOIC	Active	ROHS3 Compliant
ADM690AARNZ	Analog Devices Inc.	4.65V	Push-Pull, Totem Pole	140ms Min	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
ADM690AARNZ-REEL	Analog Devices Inc.	4.65V	Push-Pull, Totem Pole	140ms Min	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
ADM802LARNZ	Analog Devices Inc.	4.65V	Push-Pull, Totem Pole	140ms Min	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
ADM802LARNZ-REEL	Analog Devices Inc.	4.65V	Push-Pull, Totem Pole	140ms Min	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
ADM8690ARNZ	Analog Devices Inc.	4.65V	Push-Pull, Totem Pole	35ms Min	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
LTC690CS8#PBF	Analog Devices Inc.	4.65V	Open Drain or Open Collector	35ms Min	0°C ~ 70°C	8-SOIC	Active	ROHS3 Compliant
LTC690CS8#TRPBF	Analog Devices Inc.	4.65V	Open Drain or Open Collector	35ms Min	0°C ~ 70°C	8-SOIC	Active	ROHS3 Compliant
LTC690IS8#PBF	Analog Devices Inc.	4.65V	Open Drain or Open Collector	35ms Min	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications):

MAX690ACSA+ is the primary direct equivalent, offering identical electrical and mechanical specifications with the advantage of active product status and ROHS3 compliance. This part is recommended for designs requiring no circuit modifications.

MAX703CSA+ provides parametric equivalence with identical performance characteristics and active status, suitable for applications where the MAX690 base product line is preferred.

For Extended Temperature Range Applications:

ADM690AARNZ and ADM690AARNZ-REEL extend the operating temperature range to -40°C ~ 85°C while maintaining all electrical specifications. These parts are manufacturer-recommended alternatives for industrial and automotive environments. Packaging options include tube (ADM690AARNZ) and cut tape with Digi-Reel (ADM690AARNZ-REEL).

ADM802LARNZ and ADM802LARNZ-REEL offer identical specifications to the ADM690 series with extended temperature capability. Packaging options include tube (ADM802LARNZ) and tape & reel (ADM802LARNZ-REEL).

For Faster Reset Timeout Requirements:

ADM8690ARNZ provides a 35ms minimum reset timeout compared to the 140ms specification of the original part, suitable for applications requiring faster system recovery. Operating temperature range extends to -40°C ~ 85°C.

For Open Drain Output Topology:

LTC690CS8#PBF and LTC690CS8#TRPBF feature open drain or open collector output configuration instead of push-pull totem pole. These parts are suitable for applications requiring external pull-up resistor configuration. Temperature range is 0°C ~ 70°C. Packaging options include tube (LTC690CS8#PBF) and tape & reel (LTC690CS8#TRPBF).

LTC690IS8#PBF extends the temperature range to -40°C ~ 85°C with open drain output topology.

Compliance Considerations:

All substitute parts listed are ROHS3 compliant, addressing the non-compliance status of the obsolete MAX690ACSA. For new designs and procurement, ROHS3-compliant alternatives are strongly preferred.

Frequently Asked Questions (FAQ)

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

A: Yes. MAX690ACSA+ is electrically and mechanically identical to MAX690ACSA, with the primary differences being active product status and ROHS3 compliance. No circuit modifications are required.

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

A: Push-pull totem pole output (MAX690ACSA, ADM690AARNZ, ADM802LARNZ, ADM8690ARNZ) actively drives both high and low logic states. Open drain or open collector output (LTC690 series) requires an external pull-up resistor and can only actively pull low. Circuit design must accommodate this difference.

Q: Which substitute part should I select for industrial temperature range applications?

A: ADM690AARNZ, ADM690AARNZ-REEL, ADM802LARNZ, ADM802LARNZ-REEL, and LTC690IS8#PBF all support -40°C ~ 85°C operating temperature. Select based on output topology (push-pull vs. open drain) and packaging requirements (tube, cut tape, or tape & reel).

Q: What is the difference between ADM690AARNZ and ADM690AARNZ-REEL?

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

Q: Is the ADM8690ARNZ compatible with designs using MAX690ACSA?

A: ADM8690ARNZ is electrically compatible with identical voltage threshold, output topology, and reset polarity. The primary difference is a faster reset timeout of 35ms versus 140ms. Verify that the faster reset timing does not conflict with system requirements before substitution.

Q: Can LTC690 series parts replace MAX690ACSA in all applications?

A: LTC690 series parts have identical voltage threshold and reset polarity but feature open drain output instead of push-pull totem pole. Circuit design must be modified to accommodate external pull-up resistor configuration. Additionally, reset timeout is 35ms instead of 140ms.

Q: What packaging options are available for extended temperature range parts?

A: ADM690AARNZ is available in tube packaging. ADM690AARNZ-REEL is available in cut tape with Digi-Reel. ADM802LARNZ is available in tube. ADM802LARNZ-REEL is available in tape & reel. LTC690IS8#PBF is available in tube. Select based on assembly equipment compatibility and procurement volume.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant. The original MAX690ACSA is RoHS non-compliant. Substitution with any listed alternative addresses RoHS compliance requirements for new designs.

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