DS1708ESA Equivalent & Substitute Parts

Part Overview

The DS1708ESA is a single-channel power supply supervisor IC manufactured by Analog Devices Inc./Maxim Integrated, designed for power management and reset signal generation in electronic systems. This component operates as a simple reset/power-on reset supervisor with push-pull output configuration and is housed in an 8-SOIC surface mount package.

The DS1708ESA is classified as obsolete product status. Equivalent and substitute parts are available from active product lines, including direct successors and alternative voltage threshold variants from the same manufacturer family and cross-manufacturer options.

Key Parameters

Parameter	DS1708ESA
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	130ms Minimum
Operating Temperature Range	-40°C to 85°C (TA)
Package/Case	8-SOIC (0.154", 3.90mm Width)
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 DS1708ESA is determined by the following critical parameters:

Mandatory Compatibility Parameters:

Package/Case: 8-SOIC (0.154", 3.90mm Width) — all substitutes must match this physical footprint
Mounting Type: Surface Mount — all substitutes must be surface mount compatible
Number of Voltages Monitored: 1 Channel — single-channel supervision requirement
Output Configuration: Push-Pull — output stage topology must be push-pull
Reset Logic: Active High/Active Low — reset signal polarity capability
Operating Temperature Range: -40°C to 85°C (TA) — thermal operating envelope

Variable Parameters Affecting Substitution:

Voltage Threshold: Ranges from 2.63V to 4.4V across substitute options
Reset Timeout: Ranges from 130ms to 160ms minimum
Product Status: Active vs. Obsolete
RoHS Compliance: Non-compliant vs. ROHS3 compliant
Packaging Format: Tube vs. Cut Tape (CT) & Digi-Reel®

Substitutes are grouped into two categories: direct Analog Devices successors (DS1708ESA+ and ADM708 series variants) and cross-manufacturer alternatives (STM708M6F from STMicroelectronics). All substitutes maintain identical package geometry, single-channel architecture, and push-pull output topology.

Parameter Comparison

Part Number	Manufacturer	Voltage Threshold	Reset Timeout (Min)	Package	Product Status	RoHS Status	Packaging Format
DS1708ESA	Analog Devices Inc./Maxim Integrated	4.4V	130ms	8-SOIC	Obsolete	RoHS Non-Compliant	—
DS1708ESA+	Analog Devices Inc./Maxim Integrated	4.4V	130ms	8-SOIC	Active	ROHS3 Compliant	Tube
ADM708ARZ	Analog Devices Inc.	4.4V	160ms	8-SOIC	Active	ROHS3 Compliant	Tube
ADM708ARZ-REEL	Analog Devices Inc.	4.4V	160ms	8-SOIC	Active	ROHS3 Compliant	Cut Tape (CT) & Digi-Reel®
ADM708RARZ	Analog Devices Inc.	2.63V	160ms	8-SOIC	Active	ROHS3 Compliant	Tube
ADM708RARZ-REEL	Analog Devices Inc.	2.63V	160ms	8-SOIC	Active	ROHS3 Compliant	Cut Tape (CT) & Digi-Reel®
ADM708SARZ	Analog Devices Inc.	2.93V	160ms	8-SOIC	Active	ROHS3 Compliant	Tube
ADM708SARZ-REEL	Analog Devices Inc.	2.93V	160ms	8-SOIC	Active	ROHS3 Compliant	Cut Tape (CT) & Digi-Reel®
STM708M6F	STMicroelectronics	4.38V	140ms	8-SOIC	Active	ROHS3 Compliant	Cut Tape (CT)

Engineering Selection Recommendations

Direct Replacement (Identical Voltage Threshold):

DS1708ESA+ is the direct active successor to DS1708ESA, maintaining the 4.4V voltage threshold and 130ms reset timeout. This part is ROHS3 compliant and carries active product status, making it the primary choice for new designs or direct substitution in existing applications where the original voltage threshold specification is critical.

ADM708ARZ and ADM708ARZ-REEL provide equivalent 4.4V threshold operation with extended 160ms reset timeout and active product status. These parts are suitable for applications where the longer reset timeout is acceptable or beneficial. The -REEL variant offers cut tape packaging for automated assembly processes.

Alternative Voltage Threshold Options:

ADM708RARZ/ADM708RARZ-REEL (2.63V threshold) and ADM708SARZ/ADM708SARZ-REEL (2.93V threshold) are available for applications requiring lower voltage supervision thresholds. These variants maintain identical package geometry and push-pull output configuration but operate at different supply voltage monitoring points. Selection depends on the specific power supply voltage being supervised in the target application.

Cross-Manufacturer Alternative:

STM708M6F from STMicroelectronics provides a 4.38V threshold option in 8-SOIC package with active product status and ROHS3 compliance. This part is suitable for applications where cross-manufacturer sourcing is required or where supply chain diversification is necessary. The 140ms reset timeout falls between the DS1708ESA (130ms) and ADM708 series (160ms) specifications.

Compliance Considerations:

All substitute parts listed carry ROHS3 compliance status, whereas the original DS1708ESA is RoHS non-compliant. For applications subject to RoHS regulations or environmental compliance requirements, any of the listed substitutes satisfy current regulatory standards.

Frequently Asked Questions (FAQ)

Q: Can DS1708ESA+ be used as a direct replacement for DS1708ESA?

A: Yes. DS1708ESA+ maintains identical voltage threshold (4.4V), reset timeout (130ms), package geometry (8-SOIC), and functional specifications. The primary differences are active product status and ROHS3 compliance. Electrical and mechanical compatibility is complete.

Q: What is the difference between ADM708ARZ and ADM708RARZ?

A: The primary difference is voltage threshold: ADM708ARZ monitors at 4.4V, while ADM708RARZ monitors at 2.63V. Both use identical 8-SOIC packaging and push-pull output configuration. Selection depends on the supply voltage level requiring supervision in your application.

Q: Are the -REEL variants functionally equivalent to tube-packaged parts?

A: Yes. Parts designated with -REEL suffix (such as ADM708ARZ-REEL vs. ADM708ARZ) are functionally identical. The suffix indicates packaging format only: cut tape on digi-reel for automated pick-and-place assembly versus tube packaging for manual handling. Electrical specifications and performance are identical.

Q: Can STM708M6F replace DS1708ESA in all applications?

A: STM708M6F is mechanically and functionally compatible, with 4.38V threshold and 140ms reset timeout specifications close to the original 4.4V and 130ms. However, the voltage threshold difference of 0.02V and reset timeout difference of 10ms may be significant in applications with tight tolerance requirements. Verify that these parameter variations are acceptable for your specific circuit design.

Q: What is the significance of the 130ms vs. 160ms reset timeout difference?

A: Reset timeout determines the minimum duration the reset signal remains asserted after power supply stabilization. DS1708ESA specifies 130ms minimum, while most ADM708 variants specify 160ms minimum. The longer timeout in ADM708 series provides additional margin for system initialization. Applications requiring the shorter 130ms timeout should use DS1708ESA+ or STM708M6F.

Q: Are all listed substitutes available in the same packaging format?

A: No. Packaging formats vary: DS1708ESA+ and ADM708 tube variants use tube packaging, while ADM708-REEL and STM708M6F variants use cut tape or digi-reel formats. Verify packaging compatibility with your assembly process requirements before selection.

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