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LM361M Equivalent & Substitute Parts
Part Overview
The LM361M is a differential comparator IC manufactured by Texas Instruments, designed for precision voltage comparison applications. It features complementary TTL output and operates across a wide supply voltage range of ±5V to ±15V. The device is housed in a 14-SOIC surface mount package with a propagation delay of 20ns maximum.
The LM361M is classified as an obsolete product. Finding equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support legacy system maintenance where this comparator remains in active use.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | LM361M |
| Category | Linear - Comparator |
| Type | Differential |
| Number of Elements | 2 |
| Output Type | Complementary, TTL |
| Supply Voltage Range | ±5V ~ ±15V |
| Input Offset Voltage (Max) | 5mV @ 5V |
| Input Bias Current (Max) | 10µA @ 5V |
| Quiescent Current (Max) | 5mA, 10mA, 20mA |
| Propagation Delay (Max) | 20ns |
| Operating Temperature Range | 0°C ~ 70°C |
| Package / Case | 14-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the LM361M is determined by strict equivalence across the following critical parameters:
- Differential comparator topology with 2 elements
- Complementary TTL output configuration
- Supply voltage range: ±5V to ±15V
- Input offset voltage maximum: 5mV @ 5V
- Input bias current maximum: 10µA @ 5V
- Propagation delay maximum: 20ns
- Package type: 14-SOIC surface mount
- Operating temperature range: 0°C to 70°C
The LM361M/NOPB is a direct manufacturer equivalent that maintains identical electrical specifications and package configuration. The primary distinction is packaging format (Tube vs. standard) and product status (Active vs. Obsolete).
Parameter Comparison
| Parameter | LM361M | LM361M/NOPB |
|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments |
| Type | Differential | Differential |
| Number of Elements | 2 | 2 |
| Output Type | Complementary, TTL | Complementary, TTL |
| Supply Voltage Range | ±5V ~ ±15V | ±5V ~ ±15V |
| Input Offset Voltage (Max) | 5mV @ 5V | 5mV @ 5V |
| Input Bias Current (Max) | 10µA @ 5V | 10µA @ 5V |
| Quiescent Current (Max) | 5mA, 10mA, 20mA | 5mA, 10mA, 20mA |
| Propagation Delay (Max) | 20ns | 20ns |
| Operating Temperature Range | 0°C ~ 70°C | 0°C ~ 70°C |
| Package / Case | 14-SOIC (0.154", 3.90mm Width) | 14-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount | Surface Mount |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) |
| Product Status | Obsolete | Active |
| Packaging Format | Standard | Tube |
Engineering Selection Recommendations
The LM361M/NOPB is a direct functional equivalent to the LM361M. Both parts maintain identical electrical performance specifications and package configuration. The LM361M/NOPB is preferred for new designs and ongoing production due to its Active product status, ensuring continued manufacturer support and supply availability.
Both parts comply with ROHS3 standards and carry MSL Level 1 (Unlimited) moisture sensitivity ratings, making them suitable for standard PCB assembly and storage conditions without special handling requirements.
The /NOPB suffix indicates lead-free plating, consistent with modern manufacturing standards and environmental compliance requirements.
Frequently Asked Questions (FAQ)
Q: Can LM361M/NOPB be used as a direct replacement for LM361M?
A: Yes. The LM361M/NOPB is electrically and mechanically identical to the LM361M. All electrical parameters, package dimensions, and pin configurations are equivalent. The primary difference is product status (Active vs. Obsolete) and packaging format (Tube).
Q: What does the /NOPB suffix indicate?
A: The /NOPB suffix denotes lead-free plating on the component leads, compliant with RoHS directives and modern manufacturing standards.
Q: Are there any thermal or environmental differences between these parts?
A: No. Both parts operate across the identical temperature range (0°C to 70°C) and carry the same MSL Level 1 rating, indicating no special moisture sensitivity handling is required.
Q: Why is the LM361M classified as obsolete?
A: The LM361M has reached end-of-life status with Texas Instruments. The LM361M/NOPB remains in active production and is the recommended part for all applications requiring this comparator topology.
Q: Are the 14-SOIC packages physically identical?
A: Yes. Both parts use the 14-SOIC package with 0.154" (3.90mm) width. PCB footprints and assembly processes are identical.
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