DS1708RESA Equivalent & Substitute Parts

Part Overview

The DS1708RESA is a supervisor integrated circuit from Analog Devices Inc./Maxim Integrated, classified as a Power Management PMIC. This device functions as a simple reset/power-on reset supervisor with push-pull output configuration, monitoring a single voltage channel with a 2.63V threshold. The DS1708RESA is currently listed as obsolete, which necessitates identification of functionally equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across voltage monitoring, reset timing, output configuration, and thermal operating range specifications.

Key Parameters

Parameter	DS1708RESA
Manufacturer	Analog Devices Inc./Maxim Integrated
Category	Power Management (PMIC)
Type	Simple Reset/Power-On Reset
Number of Voltages Monitored	1
Voltage - Threshold	2.63V
Output Configuration	Push-Pull, Push-Pull
Reset Logic	Active High/Active Low
Reset Timeout	130ms Minimum
Operating Temperature	-40°C ~ 85°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 (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the DS1708RESA are selected based on strict electrical and mechanical parameter alignment. The critical substitution criteria are:

Electrical Compatibility Parameters:

Single voltage channel monitoring capability
2.63V voltage threshold
Push-pull output configuration
Active High/Active Low reset logic
Operating temperature range of -40°C to 85°C
Reset timeout within acceptable tolerance (130ms minimum baseline)

Mechanical Compatibility Parameters:

8-SOIC package format (0.154", 3.90mm Width)
Surface mount mounting type

The substitute parts identified—DS1708RESA+, ADM708RARZ, ADM708RARZ-REEL, and STM708RM6F—all satisfy these core electrical and mechanical requirements. Variations in reset timeout (160ms for ADM708 series, 140ms for STM708RM6F) and output stage implementation (totem pole vs. push-pull) remain within functional equivalence for supervisor applications. Packaging format differences (tube vs. cut tape/reel) do not affect electrical performance but impact supply chain and assembly considerations.

Parameter Comparison

Parameter	DS1708RESA	DS1708RESA+	ADM708RARZ	ADM708RARZ-REEL	STM708RM6F
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc.	Analog Devices Inc.	STMicroelectronics
Type	Simple Reset/Power-On Reset	Simple Reset/Power-On Reset	Simple Reset/Power-On Reset	Simple Reset/Power-On Reset	Simple Reset/Power-On Reset
Number of Voltages Monitored	1	1	1	1	1
Voltage - Threshold	2.63V	2.63V	2.63V	2.63V	2.63V
Output Configuration	Push-Pull, Push-Pull	Push-Pull, Push-Pull	Push-Pull, Push-Pull	Push-Pull, Push-Pull	Push-Pull, Totem Pole
Reset Logic	Active High/Active Low	Active High/Active Low	Active High/Active Low	Active High/Active Low	Active High/Active Low
Reset Timeout	130ms Minimum	130ms Minimum	160ms Minimum	160ms Minimum	140ms Minimum
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

DS1708RESA+ (Direct Upgrade): This part represents the active production equivalent of the obsolete DS1708RESA. It maintains identical electrical specifications including 130ms reset timeout and push-pull output configuration. The primary distinction is product status (active vs. obsolete) and RoHS3 compliance. This is the preferred direct replacement for existing designs.

ADM708RARZ and ADM708RARZ-REEL (Analog Devices Alternative): Both ADM708 variants provide full electrical compatibility with reset timeout extended to 160ms. The ADM708RARZ-REEL variant offers higher inventory availability (14,347 pcs) and cut tape/reel packaging suitable for automated assembly. Both are ROHS3 compliant and active products. Selection between tube (ADM708RARZ) and reel (ADM708RARZ-REEL) packaging depends on assembly process requirements.

STM708RM6F (Cross-Manufacturer Alternative): This STMicroelectronics part maintains voltage threshold, reset logic, and operating temperature specifications. The output stage implements totem pole configuration rather than push-pull, and reset timeout is specified at 140ms minimum. This part is ROHS3 compliant and active. Cross-manufacturer substitution requires confirmation of output stage compatibility with downstream circuitry.

All substitute parts are ROHS3 compliant, addressing regulatory requirements not met by the obsolete DS1708RESA. Selection should prioritize DS1708RESA+ for direct compatibility, with ADM708 variants as secondary options for supply chain optimization.

Frequently Asked Questions (FAQ)

Q: Can DS1708RESA+ be used as a direct replacement for DS1708RESA?

A: Yes. DS1708RESA+ maintains identical electrical specifications including 2.63V threshold, 130ms reset timeout, push-pull output, and -40°C to 85°C operating range. The primary differences are product status (active vs. obsolete) and RoHS3 compliance. Pin configuration and package dimensions are identical.

Q: What is the difference between ADM708RARZ and ADM708RARZ-REEL?

A: Both parts are electrically identical. The difference is packaging format: ADM708RARZ is supplied in tube packaging, while ADM708RARZ-REEL is supplied in cut tape with Digi-Reel format. Selection depends on assembly process requirements. ADM708RARZ-REEL offers higher inventory availability.

Q: Can STM708RM6F be substituted for DS1708RESA?

A: STM708RM6F meets the core electrical requirements: 2.63V threshold, active high/active low reset logic, and -40°C to 85°C operating range. However, the output stage is configured as totem pole rather than push-pull. Substitution is permissible only if downstream circuitry is compatible with totem pole output characteristics. Reset timeout is 140ms minimum, which is within acceptable tolerance.

Q: Why is RoHS compliance important for this substitution?

A: The original DS1708RESA is RoHS non-compliant. All substitute parts (DS1708RESA+, ADM708RARZ, ADM708RARZ-REEL, STM708RM6F) are ROHS3 compliant, meeting current regulatory requirements for electronic components in many jurisdictions. This is a significant advantage for new designs and ongoing production.

Q: Are there differences in reset timeout specifications between substitute parts?

A: Yes. DS1708RESA and DS1708RESA+ specify 130ms minimum reset timeout. ADM708RARZ and ADM708RARZ-REEL specify 160ms minimum. STM708RM6F specifies 140ms minimum. These variations are within typical supervisor application tolerances but should be confirmed against specific circuit timing requirements.

Q: What is the significance of the 8-SOIC package format?

A: All parts use 8-SOIC (0.154", 3.90mm Width) surface mount packaging. This ensures mechanical and electrical compatibility with existing PCB layouts. No board redesign is required for substitution.

Q: Which substitute part offers the best inventory availability?

A: ADM708RARZ-REEL provides the highest inventory (14,347 pcs), followed by ADM708RARZ (7,780 pcs). DS1708RESA+ has 1,099 pcs available, and STM708RM6F has 2,336 pcs. Inventory levels should be considered for supply chain planning.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message