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MAX1232ESA-T Equivalent & Substitute Parts
Part Overview
The MAX1232ESA-T is a supervisor integrated circuit manufactured by Analog Devices Inc./Maxim Integrated, classified as a Power Management PMIC. It functions as a simple reset/power-on reset supervisor with open drain or open collector output, monitoring a single voltage channel. The device is currently obsolete, which necessitates identification of equivalent and substitute parts for ongoing system support and new designs. Active alternatives with identical or compatible electrical and mechanical specifications are available from both Analog Devices and Microchip Technology.
Substiute Parts
Key Parameters
| Parameter | Specification |
|---|---|
| Manufacturer Part Number | MAX1232ESA-T |
| Manufacturer | Analog Devices Inc./Maxim Integrated |
| Category | Power Management (PMIC) |
| Type | Simple Reset/Power-On Reset |
| Number of Voltages Monitored | 1 |
| Voltage - Threshold | 4.37V, 4.62V |
| Output | Open Drain or Open Collector |
| Reset | Active High/Active Low |
| Reset Timeout | 250ms 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 MAX1232ESA-T are classified into three categories based on substitution relationship and electrical compatibility:
Direct Manufacturer Equivalent (MAX1232ESA+T): Identical base product number (MAX1232) with matching voltage thresholds (4.37V, 4.62V), output type (open drain or open collector), and all functional parameters. Differs only in packaging format (Cut Tape & Digi-Reel® versus tube) and product status (Active versus Obsolete). RoHS3 compliance is achieved in this variant.
Manufacturer Recommended Alternatives (ADM1232ARNZ, ADM1232ARNZ-REEL, ADM1232ARNZ-REEL7): These parts share identical functional classification, reset type, reset timeout, operating temperature range, package form factor (8-SOIC), and mounting type. The key difference is voltage threshold configuration: ADM1232 series features adjustable/selectable thresholds rather than fixed 4.37V/4.62V thresholds. Output capability includes both open drain and push-pull options. All variants are Active products with RoHS3 compliance.
Parametric Equivalent (TC1232EOA713): Manufactured by Microchip Technology, this part matches the MAX1232ESA-T across all critical electrical parameters: fixed voltage thresholds (4.37V, 4.62V), open drain or open collector output, reset configuration, timeout specification, and operating temperature range. Package and mounting specifications are identical. Product status is Active with RoHS3 compliance.
Parameter Comparison
| Parameter | MAX1232ESA-T | MAX1232ESA+T | ADM1232ARNZ | ADM1232ARNZ-REEL | ADM1232ARNZ-REEL7 | TC1232EOA713 |
|---|---|---|---|---|---|---|
| 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 |
| Number of Voltages Monitored | 1 | 1 | 1 | 1 | 1 | 1 |
| Voltage - Threshold | 4.37V, 4.62V | 4.37V, 4.62V | Adjustable/Selectable | Adjustable/Selectable | Adjustable/Selectable | 4.37V, 4.62V |
| Output | Open Drain or Open Collector | Open Drain or Open Collector | Open Drain, Push-Pull | Open Drain, Push-Pull | Open Drain, Push-Pull | Open Drain or Open Collector |
| 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 |
| Reset Timeout | 250ms Minimum | 250ms Minimum | 250ms Minimum | 250ms Minimum | 250ms Minimum | 250ms 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) |
| 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) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Product Status | Obsolete | Active | Active | Active | Active | Active |
| RoHS Status | RoHS non-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) |
Engineering Selection Recommendations
For Direct Replacement: MAX1232ESA+T is the primary substitute for MAX1232ESA-T. Both parts maintain identical electrical specifications with fixed voltage thresholds of 4.37V and 4.62V. The MAX1232ESA+T is an active product with RoHS3 compliance, addressing the obsolescence and regulatory compliance limitations of the original part. Packaging differs (Cut Tape & Digi-Reel® versus tube), but the 8-SOIC form factor and mounting type remain unchanged, ensuring PCB compatibility without design modification.
For Designs Requiring Adjustable Thresholds: The ADM1232ARNZ series (available in tube, reel, and reel7 packaging options) provides enhanced flexibility through adjustable/selectable voltage thresholds while maintaining all other functional parameters. These parts are active products with RoHS3 compliance. The expanded output capability (open drain and push-pull) offers additional circuit design options. Selection among ADM1232ARNZ, ADM1232ARNZ-REEL, and ADM1232ARNZ-REEL7 depends on packaging and inventory requirements.
For Multi-Source Strategy: TC1232EOA713 from Microchip Technology provides parametric equivalence with fixed voltage thresholds matching the original MAX1232ESA-T specification. This part is active with RoHS3 compliance and offers supply chain diversification from a different manufacturer. The 8-SOIC package and surface mount configuration ensure mechanical compatibility.
All recommended substitutes maintain the 250ms minimum reset timeout, active high/active low reset configuration, single voltage monitoring channel, and -40°C to 85°C operating temperature range of the original part.
Frequently Asked Questions (FAQ)
Q: Can MAX1232ESA+T be used as a direct replacement for MAX1232ESA-T?
A: Yes. Both parts share identical electrical specifications including voltage thresholds (4.37V, 4.62V), output type (open drain or open collector), reset configuration, and operating temperature range. The primary differences are product status (Active versus Obsolete) and packaging format (Cut Tape & Digi-Reel® versus tube). The 8-SOIC form factor is identical, requiring no PCB design changes.
Q: What is the key difference between MAX1232ESA+T and ADM1232ARNZ?
A: The voltage threshold configuration differs. MAX1232ESA+T has fixed thresholds at 4.37V and 4.62V, while ADM1232ARNZ features adjustable/selectable thresholds. Both maintain identical reset timeout (250ms minimum), operating temperature range (-40°C to 85°C), and 8-SOIC packaging. ADM1232ARNZ also offers push-pull output capability in addition to open drain.
Q: Is TC1232EOA713 electrically equivalent to MAX1232ESA-T?
A: Yes. TC1232EOA713 is a parametric equivalent manufactured by Microchip Technology. It matches the MAX1232ESA-T across all critical electrical parameters: fixed voltage thresholds (4.37V, 4.62V), open drain or open collector output, reset configuration, 250ms minimum timeout, and -40°C to 85°C operating temperature. Package and mounting specifications are identical.
Q: What are the packaging differences among ADM1232ARNZ variants?
A: ADM1232ARNZ is supplied in tube packaging. ADM1232ARNZ-REEL and ADM1232ARNZ-REEL7 are supplied in Cut Tape & Digi-Reel® format. All three variants are electrically identical with adjustable/selectable voltage thresholds. Selection depends on procurement quantity, inventory management, and assembly line requirements.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. MAX1232ESA+T, ADM1232ARNZ, ADM1232ARNZ-REEL, ADM1232ARNZ-REEL7, and TC1232EOA713 are all RoHS3 compliant. The original MAX1232ESA-T is RoHS non-compliant, making the substitutes suitable for applications with RoHS compliance requirements.
Q: Can ADM1232ARNZ be used in applications requiring fixed voltage thresholds?
A: ADM1232ARNZ features adjustable/selectable thresholds rather than fixed thresholds. For applications requiring fixed 4.37V and 4.62V thresholds, MAX1232ESA+T or TC1232EOA713 are appropriate selections. If the application can accommodate adjustable thresholds, ADM1232ARNZ provides additional design flexibility.
Q: What is the moisture sensitivity level for all parts?
A: All parts, including the original MAX1232ESA-T and all substitutes, have a Moisture Sensitivity Level (MSL) of 1 (Unlimited), indicating no moisture sensitivity restrictions for storage and handling.
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