LM358N and LM358P are two widely used ordering variants of the LM358 dual operational amplifier. Both devices are designed for general-purpose analog applications, including signal conditioning, sensor interfaces, control circuits, and low-frequency amplification.
Although the two part numbers are very similar, engineers evaluating LM358N vs LM358P should look beyond the basic LM358 family name. The exact device version, electrical specifications, package, operating conditions, and ordering information should be checked before selecting a component for a new design or replacing an existing one.
Both LM358N and LM358P are 8-pin PDIP versions of the LM358 family available from Texas Instruments. TI currently lists LM358N/NOPB as an active 8-pin PDIP device with a 0°C to 70°C operating temperature range. LM358P is also listed as an active 8-pin PDIP device with the same 0°C to 70°C temperature range.
This means the two ordering codes share the same basic package format and target similar general-purpose operational amplifier applications.
However, the datasheet family information associated with LM358N and LM358P should still be reviewed carefully because TI provides different LM358 product variants and documentation across its product lines.
One of the clearest similarities is the package.
LM358N/NOPB uses an 8-pin PDIP package, identified by TI as package drawing P. LM358P is also supplied in an 8-pin PDIP package.
The PDIP package is widely used in through-hole electronic designs and is convenient for prototyping, educational projects, maintenance, and applications where through-hole assembly is preferred.
Because both ordering variants use the same basic package type and pin count, package evaluation is relatively straightforward. Nevertheless, engineers should always verify the exact datasheet and ordering code before assuming that two components are interchangeable.
TI identifies LM358N/NOPB as a dual operational amplifier with a 1 MHz unity-gain bandwidth. The device supports a single-supply range of 3 V to 32 V, or dual supplies from ±1.5 V to ±16 V. TI also specifies low supply current, a typical input offset voltage specification, and an input common-mode range that includes ground.
These characteristics make the LM358 family useful in circuits where the amplifier must operate from a single low-voltage supply.
Typical applications include sensor signal conditioning, voltage amplification, filtering, threshold detection, and analog control circuits.
TI lists LM358P as a dual 30-V, 700-kHz operational amplifier and identifies the part as an 8-pin PDIP device with a 0°C to 70°C operating temperature range.
The difference in the published headline specifications is important when comparing LM358P with LM358N.
Rather than assuming that every LM358 ordering code has identical electrical characteristics, engineers should use the applicable product documentation for the exact part number being considered.
This is particularly important when the circuit operates close to its bandwidth, supply-voltage, offset-voltage, or other electrical limits.
Bandwidth is one of the specifications that deserves attention in a direct comparison.
TI's LM358-N documentation specifies a 1 MHz unity-gain bandwidth for LM358N/NOPB.
TI's current LM358 product page lists LM358P with a 700-kHz bandwidth in its headline specifications.
For low-frequency signal conditioning, this difference may have little practical effect. However, applications involving faster signals, filtering, feedback loops, or higher closed-loop bandwidth should evaluate the actual frequency response required by the circuit.
Power supply requirements are another important point when evaluating LM358N and LM358P.
The LM358-N documentation specifies a single-supply operating range of 3 V to 32 V, or ±1.5 V to ±16 V for dual-supply operation.
TI's LM358 product information describes the broader LM358 family with wide supply capability, while individual ordering codes and device variants should be checked against their applicable specifications.
For an existing circuit, engineers should compare the actual supply voltage with the recommended operating range rather than selecting a replacement based only on the LM358 name.
The ability of the LM358 family to operate with input common-mode voltage close to ground is one reason the device is widely used in single-supply circuits.
For LM358N/NOPB, TI specifically identifies an input common-mode voltage range that includes ground.
This characteristic is useful for sensor interfaces and control circuits where the input signal may start at or near 0 V.
When comparing specific LM358 variants, however, engineers should verify the complete electrical specifications at the intended supply voltage and temperature.
The LM358 family is commonly selected when a circuit needs a simple dual operational amplifier without requiring a high-performance precision amplifier.
Applications can include:
Sensor signal conditioning
Voltage amplification
Active filters
Threshold detection
Battery monitoring
Industrial control circuits
Analog measurement
Embedded system interfaces
The low supply current and single-supply capability make the device suitable for many low-complexity analog circuits.
Because LM358N and LM358P are both listed in 8-pin PDIP packages, they can be attractive options when an existing through-hole PCB is designed around the LM358 package.
However, physical package similarity should not be treated as proof of complete electrical interchangeability.
Before changing an existing component, engineers should compare:
Supply voltage
Input offset voltage
Input bias current
Common-mode range
Output voltage range
Gain-bandwidth product
Slew rate
Supply current
Operating temperature
Package and pinout
The actual circuit operating point should then be compared against the relevant specifications.
Both LM358N and LM358P can be considered for general-purpose analog circuits.
Typical applications include sensor interfaces, signal conditioning, analog control, instrumentation, voltage monitoring, and embedded electronics.
For simple low-frequency circuits, the difference between particular LM358 variants may not be significant.
For higher-speed or more demanding analog designs, however, the specific electrical specifications become more important.
LM358N and LM358P are both 8-pin PDIP LM358-family devices from Texas Instruments, so they have a high degree of package-level similarity.
However, engineers should not automatically assume that one ordering code is an unconditional replacement for the other.
The published product information shows differences in headline bandwidth specifications, with LM358N/NOPB listed at 1 MHz and LM358P listed at 700 kHz.
For a simple low-frequency design, this difference may not affect operation. For circuits with tighter frequency-response requirements, the original device's electrical specifications should be compared with the proposed replacement before production.
The main points to review are:
LM358N/NOPB is an 8-pin PDIP LM358 variant.
LM358P is also an 8-pin PDIP LM358 variant.
Both are listed for 0°C to 70°C operation.
LM358N/NOPB is specified with a 1 MHz unity-gain bandwidth.
LM358P is currently listed by TI with a 700-kHz bandwidth.
Both target general-purpose dual operational amplifier applications.
The exact electrical specifications should be verified against the applicable TI documentation before component substitution.
For a new design, the choice should be based on the required electrical performance, package, supply voltage, signal bandwidth, operating environment, and sourcing requirements.
For an existing LM358-based design, engineers should first identify the complete original ordering code. They can then compare the proposed device against the actual circuit requirements.
Package compatibility is only one part of the evaluation. Analog performance, operating conditions, and circuit stability should also be considered.
LM358N and LM358P are closely related dual operational amplifier ordering variants, and both are available in 8-pin PDIP packages from Texas Instruments.
The important point for engineers is that similar part numbers do not necessarily mean identical electrical specifications. The current TI product information shows a difference in the listed bandwidth between LM358N/NOPB and LM358P.
For applications where bandwidth and other analog parameters are not close to their design limits, either device may be worth evaluating. For production designs, the exact ordering code, datasheet specifications, circuit requirements, and operating conditions should be checked before making a component substitution.
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