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MAX9120ESA+ Equivalent & Substitute Parts
Part Overview
The MAX9120ESA+ is a general-purpose comparator manufactured by Analog Devices Inc./Maxim Integrated, designed for applications requiring single-element open-drain output configurations. This device operates across a supply voltage range of 1.6V to 5.5V and is housed in an 8-SOIC surface-mount package. The part is currently in active production status with RoHS3 compliance and unlimited moisture sensitivity rating.
Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing due to inventory constraints, manufacturing discontinuation, or specific packaging format requirements while maintaining functional compatibility within the defined electrical and mechanical parameters.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices Inc./Maxim Integrated |
| Part Number | MAX9120ESA+ |
| Category | Linear |
| Type | General Purpose Comparator |
| Number of Elements | 1 |
| Output Type | Open-Drain |
| Supply Voltage Range | 1.6V ~ 5.5V |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 85°C |
| Product Status | Active |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the MAX9120ESA+ are qualified based on the following critical parameters that determine functional compatibility:
- Package Type: 8-SOIC surface-mount package with 0.154" (3.90mm) width
- Supply Voltage Range: 1.6V ~ 5.5V minimum overlap
- Output Configuration: Open-drain output topology
- Number of Elements: Single comparator element
- Mounting Technology: Surface mount
- Compliance: RoHS3 compliant, MSL 1 rating
The MCP6546 series from Microchip Technology meets these core substitution criteria across multiple packaging variants (Tube, Tape & Reel, and Cut Tape). All qualified substitutes maintain the same 8-SOIC package footprint, supply voltage compatibility, and open-drain output structure required for direct functional replacement.
Parameter Comparison
| Parameter | MAX9120ESA+ | MCP6546-E/SN | MCP6546-I/SN | MCP6546T-E/SN | MCP6546T-I/SN |
|---|---|---|---|---|---|
| Manufacturer | Analog Devices Inc./Maxim Integrated | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Type | General Purpose | General Purpose | General Purpose | General Purpose | General Purpose |
| Number of Elements | 1 | 1 | 1 | 1 | 1 |
| Output Type | Open-Drain | CMOS, Open-Drain, Rail-to-Rail, TTL | CMOS, Open-Drain, Rail-to-Rail, TTL | CMOS, Open-Drain, Rail-to-Rail, TTL | CMOS, Open-Drain, Rail-to-Rail, TTL |
| Supply Voltage Range | 1.6V ~ 5.5V | 1.6V ~ 5.5V | 1.6V ~ 5.5V | 1.6V ~ 5.5V | 1.6V ~ 5.5V |
| Voltage - Input Offset (Max) | 5mV @ 5V | 7mV @ 5.5V | 7mV @ 5.5V | 7mV @ 5.5V | 7mV @ 5.5V |
| Current - Input Bias (Max) | 0.001µA @ 5V | 1pA @ 5.5V | 1pA @ 5.5V | 1pA @ 5.5V | 1pA @ 5.5V |
| Current - Output (Typ) | 50mA | 30mA | 30mA | 30mA | 30mA |
| Current - Quiescent (Max) | 1.2µA | 1µA | 1µA | 1µA | 1µA |
| CMRR (Typ) | 66.02dB | 70dB | 70dB | 70dB | 70dB |
| PSRR (Typ) | 80dB | 80dB | 80dB | 80dB | 80dB |
| Propagation Delay (Max) | 45µs | 8µs | 8µs | 8µs | 8µs |
| Hysteresis | 4mV | 6.5mV | 6.5mV | 6.5mV | 6.5mV |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 125°C | -40°C ~ 85°C | -40°C ~ 125°C | -40°C ~ 85°C |
| 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 |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
| Packaging Format | Standard | Tube | Tube | Tape & Reel (TR) | Cut Tape (CT) |
Engineering Selection Recommendations
All qualified substitute parts maintain active product status and full RoHS3 compliance with MSL 1 rating, ensuring regulatory and environmental compatibility with the original MAX9120ESA+.
MCP6546-E/SN and MCP6546-I/SN are available in tube packaging, suitable for standard component distribution and manual assembly workflows. The temperature-rated variant MCP6546-E/SN extends operating range to 125°C, while MCP6546-I/SN maintains the -40°C to 85°C specification matching the original device.
MCP6546T-E/SN and MCP6546T-I/SN are supplied in tape and reel or cut tape formats, optimized for high-volume automated assembly processes. MCP6546T-E/SN provides extended temperature operation to 125°C, whereas MCP6546T-I/SN maintains standard temperature range compatibility.
Selection between variants depends on packaging requirements for your assembly process and temperature operating envelope specifications. All variants share identical electrical performance characteristics and 8-SOIC footprint compatibility.
Frequently Asked Questions (FAQ)
Q: Can MCP6546 series parts directly replace MAX9120ESA+ in existing designs?
A: Yes. All qualified MCP6546 variants share the same 8-SOIC package footprint, supply voltage range (1.6V ~ 5.5V), open-drain output configuration, and single-element comparator topology. Pin-to-pin compatibility is maintained across all substitutes.
Q: What is the difference between MCP6546-E/SN and MCP6546-I/SN?
A: Both parts are functionally identical in electrical performance and packaging (tube format). The primary difference is operating temperature range: MCP6546-E/SN operates from -40°C to 125°C, while MCP6546-I/SN operates from -40°C to 85°C, matching the original MAX9120ESA+ specification.
Q: What packaging formats are available for MCP6546 substitutes?
A: MCP6546 is available in three packaging formats: Tube (MCP6546-E/SN, MCP6546-I/SN), Tape & Reel (MCP6546T-E/SN), and Cut Tape (MCP6546T-I/SN). Selection depends on assembly process requirements and volume specifications.
Q: Are there electrical performance differences between MAX9120ESA+ and MCP6546 substitutes?
A: MCP6546 variants demonstrate improved propagation delay (8µs versus 45µs) and lower input bias current (1pA versus 0.001µA). Input offset voltage is slightly higher (7mV versus 5mV) and hysteresis is increased (6.5mV versus 4mV). These differences remain within typical application tolerances for general-purpose comparator circuits.
Q: Do all substitute parts maintain RoHS3 compliance?
A: Yes. All MCP6546 variants are RoHS3 compliant with MSL 1 (unlimited) moisture sensitivity rating, matching the regulatory and environmental specifications of the original MAX9120ESA+.
Q: Which substitute should I select for high-volume production?
A: For automated assembly processes, MCP6546T-E/SN (Tape & Reel) or MCP6546T-I/SN (Cut Tape) are optimized for high-volume manufacturing workflows. For standard distribution and manual assembly, tube-packaged variants (MCP6546-E/SN, MCP6546-I/SN) are appropriate.
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