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MAX641ACSA Equivalent & Substitute Parts
Part Overview
The MAX641ACSA is a boost switching regulator IC from Analog Devices Inc./Maxim Integrated, classified as a Power Management (PMIC) component. This device functions as a step-up converter with positive output configuration, delivering adjustable/fixed output voltage from 1.31V to 18V at 450mA output current. The MAX641ACSA is currently listed as obsolete, making identification of equivalent substitute parts essential for ongoing system support and component procurement.
Substiute Parts
Key Parameters
| Parameter | Specification |
|---|---|
| Manufacturer | Analog Devices Inc./Maxim Integrated |
| Base Product Number | MAX641 |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Function | Step-Up (Boost) |
| Output Configuration | Positive |
| Voltage - Input (Min/Max) | 2V to 16.5V |
| Voltage - Output (Min/Fixed) | 1.31V (5V) |
| Voltage - Output (Max) | 18V (Switch) |
| Current - Output | 450mA (Switch) |
| Frequency - Switching | 45kHz |
| Operating Temperature | 0°C to 70°C (TA) |
| Mounting Type | Surface Mount |
| Synchronous Rectifier | No |
Substitute Part Grouping Explanation
Substitution eligibility for the MAX641ACSA is determined by strict equivalence across the following critical parameters:
- Identical base product number (MAX641)
- Matching package type (8-SOIC with 0.154" / 3.90mm width)
- Identical functional topology (boost/step-up converter)
- Matching output configuration (positive)
- Identical electrical specifications: input voltage range (2V–16.5V), output voltage range (1.31V–18V), output current (450mA), and switching frequency (45kHz)
- Compatible operating temperature range (0°C–70°C minimum)
- Surface mount mounting type
The MAX641ACSA+ meets all substitution criteria as a direct equivalent part from the same manufacturer with identical electrical and mechanical characteristics.
Parameter Comparison
| Parameter | MAX641ACSA (Main Part) | MAX641ACSA+ (Substitute) |
|---|---|---|
| Manufacturer | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated |
| Base Product Number | MAX641 | MAX641 |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) |
| Function | Step-Up | Step-Up |
| Output Configuration | Positive | Positive |
| Voltage - Input (Min) | 2V | 2V |
| Voltage - Input (Max) | 16.5V | 16.5V |
| Voltage - Output (Min/Fixed) | 1.31V (5V) | 1.31V (5V) |
| Voltage - Output (Max) | 18V (Switch) | 18V (Switch) |
| Current - Output | 450mA (Switch) | 450mA (Switch) |
| Frequency - Switching | 45kHz | 45kHz |
| Operating Temperature | 0°C to 70°C (TA) | 0°C to 70°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Synchronous Rectifier | No | No |
| Product Status | Obsolete | Active |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant |
| Packaging Type | Not specified | Tube |
Engineering Selection Recommendations
The MAX641ACSA+ is the direct substitute for the obsolete MAX641ACSA. Both parts share identical electrical and mechanical specifications, ensuring pin-for-pin and functional compatibility. The primary distinction is product status: the MAX641ACSA is obsolete while the MAX641ACSA+ is active and currently in production.
The MAX641ACSA+ offers improved compliance status, meeting ROHS3 requirements compared to the non-compliant RoHS status of the original part. This compliance improvement is significant for applications subject to environmental and regulatory standards. Both parts maintain REACH Unaffected status and EAR99 export classification.
For new designs or component replenishment, the MAX641ACSA+ is the appropriate selection due to its active product status and improved regulatory compliance. Existing inventory of MAX641ACSA units remains functionally equivalent for applications without RoHS compliance mandates.
Frequently Asked Questions (FAQ)
Q: Can MAX641ACSA+ be used as a direct replacement for MAX641ACSA?
A: Yes. The MAX641ACSA+ is a direct substitute with identical electrical specifications, output voltage range (1.31V–18V), output current (450mA), input voltage range (2V–16.5V), switching frequency (45kHz), and 8-SOIC package configuration. Pin-for-pin compatibility is maintained.
Q: What is the primary reason to substitute MAX641ACSA with MAX641ACSA+?
A: The MAX641ACSA is obsolete and no longer manufactured. The MAX641ACSA+ is the active equivalent part from the same manufacturer with identical performance characteristics and improved RoHS3 compliance.
Q: Are there packaging differences between these parts?
A: Both parts use the same 8-SOIC (0.154", 3.90mm Width) package for surface mount applications. The MAX641ACSA+ is supplied in tube packaging, while the original part packaging type is not specified.
Q: Do these parts have different operating temperature ranges?
A: No. Both the MAX641ACSA and MAX641ACSA+ operate across the identical temperature range of 0°C to 70°C (TA).
Q: What is the significance of the RoHS compliance difference?
A: The MAX641ACSA+ meets ROHS3 compliance standards, while the MAX641ACSA is RoHS non-compliant. For applications requiring environmental compliance certification or operating in regulated markets, the MAX641ACSA+ is the appropriate choice.
Q: Are the switching frequencies identical?
A: Yes. Both parts operate at 45kHz switching frequency, ensuring equivalent performance in boost converter applications.
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