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MAX708ESA-T Equivalent & Substitute Parts
Part Overview
The MAX708ESA-T is a single-channel power supply supervisor IC manufactured by onsemi, designed for power-on reset and simple reset applications in 8-SOIC surface mount packaging. This device monitors a single voltage threshold at 4.4V with push-pull output configuration and a 140ms minimum reset timeout. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | MAX708ESA-T |
| Manufacturer | onsemi |
| Category | Power Management (PMIC) |
| 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 | 140ms 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
Substitution of the MAX708ESA-T is determined by strict equivalence across the following critical parameters:
Primary Equivalence Criteria:
- Single voltage monitoring channel
- 4.4V voltage threshold
- Push-Pull output configuration
- Active High/Active Low reset capability
- 140ms minimum reset timeout
- 8-SOIC package (0.154", 3.90mm Width)
- Surface mount mounting type
Parametric Equivalent Category: Parts meeting all primary equivalence criteria with identical electrical specifications are classified as parametric equivalents. The MAX708ESA-TG from onsemi qualifies as a parametric equivalent, differing only in packaging format (Cut Tape & Digi-Reel vs. standard packaging).
Similar Substitute Category: Parts with identical core functionality, package, and reset characteristics but differing in output configuration (complementary vs. push-pull) or operating temperature range are classified as similar substitutes. These include MAX708CSA+ and MAX708CSA+T from Analog Devices Inc./Maxim Integrated, and MIC708 series variants from Microchip Technology.
Voltage Threshold Variants: MIC708RMY and MIC708RMY-TR feature a 2.63V threshold; MIC708SMY and MIC708SMY-TR feature a 2.93V threshold; MIC708TMY features a 3.08V threshold. These are not direct substitutes for the 4.4V threshold requirement but are listed for reference in applications requiring alternative voltage monitoring levels.
Parameter Comparison
| Part Number | Manufacturer | Voltage Threshold | Output Type | Operating Temp | Package | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|
| MAX708ESA-T | onsemi | 4.4V | Push-Pull | -40°C ~ 85°C | 8-SOIC | Obsolete | RoHS non-compliant |
| MAX708ESA-TG | onsemi | 4.4V | Push-Pull | -40°C ~ 85°C | 8-SOIC | Obsolete | ROHS3 Compliant |
| MAX708CSA+ | Analog Devices Inc./Maxim Integrated | 4.4V | Push-Pull | 0°C ~ 70°C | 8-SOIC | Active | ROHS3 Compliant |
| MAX708CSA+T | Analog Devices Inc./Maxim Integrated | 4.4V | Push-Pull | 0°C ~ 70°C | 8-SOIC | Active | ROHS3 Compliant |
| MIC708MY | Microchip Technology | 4.4V | Complementary | -40°C ~ 85°C | 8-SOIC | Active | ROHS3 Compliant |
| MIC708MY-TR | Microchip Technology | 4.4V | Complementary | -40°C ~ 85°C | 8-SOIC | Active | ROHS3 Compliant |
Engineering Selection Recommendations
For Direct Replacement (Parametric Equivalent): MAX708ESA-TG is the primary parametric equivalent to MAX708ESA-T. Both devices maintain identical electrical specifications and 8-SOIC packaging. MAX708ESA-TG offers improved compliance status (ROHS3 Compliant) and higher inventory availability (55,655 pcs vs. 1,581 pcs), making it the preferred choice for new designs and ongoing production.
For Active Product Status Requirement: MAX708CSA+ and MAX708CSA+T from Analog Devices Inc./Maxim Integrated are active products with ROHS3 compliance. These parts maintain the 4.4V threshold and push-pull output configuration. The operating temperature range is restricted to 0°C ~ 70°C compared to the original -40°C ~ 85°C specification. Selection of these parts requires verification that the narrower temperature range is acceptable for the target application.
For Extended Temperature Range with Active Status: MIC708MY and MIC708MY-TR from Microchip Technology maintain the -40°C ~ 85°C operating temperature range and 4.4V threshold with active product status and ROHS3 compliance. The output configuration differs (complementary vs. push-pull), requiring circuit-level verification of compatibility with existing reset signal requirements.
Compliance Considerations: All substitute parts listed (except the original MAX708ESA-T) are ROHS3 compliant and REACH unaffected. Selection should prioritize active products with current compliance certifications for new designs.
Frequently Asked Questions (FAQ)
Q: Can MAX708ESA-TG be used as a direct replacement for MAX708ESA-T? A: Yes. MAX708ESA-TG is a parametric equivalent with identical electrical specifications, voltage threshold (4.4V), output configuration (push-pull), reset timeout (140ms minimum), and 8-SOIC packaging. The only differences are packaging format and improved RoHS compliance status.
Q: What is the difference between push-pull and complementary output configurations? A: Push-pull output provides active drive capability in both high and low states. Complementary output provides one active output and one passive output. Circuit compatibility depends on the specific reset signal requirements of the target application. Direct substitution between these output types requires verification of signal conditioning requirements.
Q: Why does MAX708CSA+ have a narrower operating temperature range? A: MAX708CSA+ is specified for 0°C ~ 70°C operation, compared to the original MAX708ESA-T specification of -40°C ~ 85°C. This reflects the design and qualification parameters of the Analog Devices product line. Applications requiring full -40°C ~ 85°C operation should select alternatives such as MIC708MY or MAX708ESA-TG.
Q: Are MIC708RMY, MIC708SMY, and MIC708TMY suitable replacements? A: These Microchip parts feature different voltage thresholds (2.63V, 2.93V, and 3.08V respectively) and are not suitable for applications requiring 4.4V threshold monitoring. They are listed as reference alternatives only for applications with different voltage monitoring requirements.
Q: What packaging options are available for substitute parts? A: All listed parts maintain the 8-SOIC (0.154", 3.90mm Width) surface mount package. Packaging format variations include standard tube, cut tape with Digi-Reel, and tape & reel (TR) options. Selection should be based on procurement and assembly process requirements.
Q: Is the MAX708ESA-T still available for procurement? A: MAX708ESA-T is classified as obsolete with limited inventory (1,581 pcs). For new designs and ongoing production, parametric equivalent MAX708ESA-TG or active product alternatives should be specified to ensure long-term supply chain continuity.
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