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DS1708ESA/T&R Equivalent & Substitute Parts
Part Overview
The DS1708ESA/T&R is a single-channel power management supervisor IC manufactured by Analog Devices Inc./Maxim Integrated, designed for simple reset and power-on reset applications. This component operates as a push-pull output supervisor with a 4.4V voltage threshold and 130ms minimum reset timeout. The part is classified as obsolete, which necessitates identification of functionally equivalent active alternatives for new designs and ongoing production requirements. Substitute parts maintain core electrical and mechanical compatibility while offering active product status and improved compliance certifications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Part Number | DS1708ESA/T&R |
| Manufacturer | Analog Devices Inc./Maxim Integrated |
| Category | Power Management (PMIC) |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Type | Simple Reset/Power-On Reset |
| Number of Voltages Monitored | 1 |
| Voltage - Threshold | 4.4V |
| Output | Push-Pull, Push-Pull |
| Reset | Active High/Active Low |
| Reset Timeout | 130ms Minimum |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount |
| RoHS Status | RoHS non-compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitute parts are grouped based on voltage threshold compatibility and reset timeout specifications. The DS1708ESA/T&R operates at a 4.4V threshold with 130ms minimum reset timeout. Direct electrical substitutes must maintain identical voltage monitoring characteristics and compatible reset timing parameters.
Substitution logic is based on the following criteria:
- Identical package type: 8-SOIC surface mount configuration
- Matching output configuration: Push-Pull topology
- Compatible reset functionality: Active High/Active Low capability
- Operating temperature range: -40°C to 85°C
- Voltage threshold alignment or functional equivalence
- Reset timeout specifications meeting or exceeding minimum requirements
The ADM708 series from Analog Devices provides functionally equivalent alternatives with different voltage threshold variants (2.63V, 2.93V, and 4.4V). The DS1708ESA+T&R represents a direct packaging variant of the original part with improved compliance status. ADM708ARZ, ADM708ARZ-REEL, ADM708RARZ, ADM708RARZ-REEL, ADM708SARZ, and ADM708SARZ-REEL offer active product status with voltage threshold options suitable for different application requirements.
Parameter Comparison
| Parameter | DS1708ESA/T&R | DS1708ESA+T&R | ADM708ARZ | ADM708ARZ-REEL | ADM708RARZ | ADM708RARZ-REEL | ADM708SARZ | ADM708SARZ-REEL |
|---|---|---|---|---|---|---|---|---|
| Manufacturer | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. |
| 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) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) |
| 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 | Simple Reset/Power-On Reset | Simple Reset/Power-On Reset | Simple Reset/Power-On Reset |
| Number of Voltages Monitored | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Voltage - Threshold | 4.4V | 4.4V | 4.4V | 4.4V | 2.63V | 2.63V | 2.93V | 2.93V |
| Output | Push-Pull, Push-Pull | Push-Pull, Push-Pull | Push-Pull, Push-Pull | Push-Pull, Push-Pull | Push-Pull, Push-Pull | Push-Pull, Push-Pull | Push-Pull, Push-Pull | Push-Pull, Push-Pull |
| Reset | Active High/Active Low | Active High/Active Low | Active High/Active Low | 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 | 160ms Minimum | 160ms Minimum | 160ms Minimum | 160ms 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) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active | Active |
| Packaging | Tape & Reel (TR) | Tape & Reel (TR) | Tube | Cut Tape (CT) & Digi-Reel® | Tube | Cut Tape (CT) & Digi-Reel® | Tube | Cut Tape (CT) & Digi-Reel® |
Engineering Selection Recommendations
For applications currently using DS1708ESA/T&R, the DS1708ESA+T&R provides the most direct substitution path. This part maintains identical electrical specifications including the 4.4V voltage threshold and 130ms reset timeout, while offering active product status and ROHS3 compliance certification. The packaging format remains Tape & Reel configuration, supporting equivalent assembly processes.
For new designs or applications where voltage threshold flexibility is acceptable, the ADM708 series offers multiple threshold options with active product status and ROHS3 compliance. Selection within the ADM708 family depends on required voltage threshold:
- ADM708ARZ and ADM708ARZ-REEL: 4.4V threshold, matching the original DS1708ESA/T&R specification
- ADM708SARZ and ADM708SARZ-REEL: 2.93V threshold
- ADM708RARZ and ADM708RARZ-REEL: 2.63V threshold
All ADM708 variants feature 160ms minimum reset timeout, which exceeds the 130ms requirement of the original part. Packaging options include Tube and Cut Tape with Digi-Reel configurations to accommodate different procurement and assembly workflows.
Frequently Asked Questions (FAQ)
Q: Can ADM708ARZ directly replace DS1708ESA/T&R in existing designs?
A: ADM708ARZ maintains identical voltage threshold (4.4V), output configuration (Push-Pull), reset functionality (Active High/Active Low), and operating temperature range (-40°C to 85°C). The reset timeout is 160ms minimum compared to 130ms minimum for the original part, which is functionally compatible. Both use 8-SOIC surface mount packaging. The primary difference is packaging format: ADM708ARZ is supplied in Tube, while DS1708ESA/T&R uses Tape & Reel. Electrical functionality is equivalent.
Q: What is the difference between ADM708ARZ and ADM708ARZ-REEL?
A: Both parts are electrically identical with 4.4V voltage threshold and 160ms reset timeout. The difference is packaging format: ADM708ARZ is supplied in Tube packaging, while ADM708ARZ-REEL uses Cut Tape with Digi-Reel configuration. Selection depends on assembly line requirements and inventory management preferences.
Q: Why do ADM708RARZ and ADM708SARZ have different voltage thresholds?
A: The ADM708 supervisor family offers multiple voltage threshold variants to support different power supply monitoring requirements. ADM708RARZ operates at 2.63V threshold, ADM708SARZ at 2.93V threshold, and ADM708ARZ at 4.4V threshold. Selection must match the specific voltage monitoring requirement of the application. The DS1708ESA/T&R operates at 4.4V, so ADM708ARZ or ADM708ARZ-REEL are the appropriate substitutes for this threshold.
Q: Is DS1708ESA+T&R a suitable replacement for DS1708ESA/T&R?
A: Yes. DS1708ESA+T&R is electrically and mechanically identical to DS1708ESA/T&R, maintaining the 4.4V voltage threshold, 130ms reset timeout, and 8-SOIC surface mount package. The primary advantage is active product status and ROHS3 compliance certification compared to the obsolete, RoHS non-compliant original part. Both use Tape & Reel packaging.
Q: What is the impact of the 160ms reset timeout in ADM708 variants compared to the 130ms specification?
A: The ADM708 series specifies 160ms minimum reset timeout, which is longer than the 130ms minimum of DS1708ESA/T&R. This represents a more conservative timing specification and is functionally compatible with applications designed for the original 130ms timeout. The longer timeout does not create incompatibility; it provides additional margin for power supply stabilization.
Q: Are all substitute parts RoHS compliant?
A: DS1708ESA/T&R is RoHS non-compliant. DS1708ESA+T&R and all ADM708 variants (ADM708ARZ, ADM708ARZ-REEL, ADM708RARZ, ADM708RARZ-REEL, ADM708SARZ, ADM708SARZ-REEL) are ROHS3 compliant, meeting current environmental and regulatory requirements.
Q: Can I use ADM708RARZ or ADM708SARZ as substitutes for DS1708ESA/T&R?
A: ADM708RARZ and ADM708SARZ are not direct substitutes for DS1708ESA/T&R because they operate at different voltage thresholds (2.63V and 2.93V respectively, compared to 4.4V for the original part). These parts are suitable only for applications requiring their specific voltage thresholds. For DS1708ESA/T&R replacement, use ADM708ARZ or ADM708ARZ-REEL, which maintain the 4.4V threshold.
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