LM393P-NG Equivalent & Substitute Parts

Part Overview

The LM393P-NG is a dual general-purpose comparator manufactured by Texas Instruments, featuring open-collector, rail-to-rail output configuration in an 8-PDIP package. This device is designed for applications requiring precision voltage comparison across a wide supply voltage range of 2V to 30V (single supply) or ±1V to ±15V (dual supply).

The LM393P-NG is classified as obsolete. Identification of equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for legacy systems utilizing this comparator topology.

Substiute Parts

LM393P-NG

Texas InstrumentsIn Stock: 1149LM393P-NG Datasheet

Current PartRFQ

LM393P

Texas InstrumentsIn Stock: 161918LM393P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM393P-NG is determined by strict equivalence across the following critical parameters:

Functional Equivalence Criteria:

• Dual comparator topology (2 elements)
• Open-collector, rail-to-rail output configuration
• 8-PDIP package form factor with identical pin assignment
• Input offset voltage specification of 5mV maximum at 30V
• Input bias current specification of 0.25µA maximum at 5V
• Operating temperature range of 0°C to 70°C

Supply Voltage Compatibility: The substitute part must support the minimum and maximum supply voltage requirements of the application. The LM393P-NG operates across 2V to 30V (single supply) or ±1V to ±15V (dual supply). Substitute parts with equal or extended supply voltage ranges are electrically compatible.

Output Drive and Quiescent Current: Output current capability and quiescent current consumption must meet or exceed the specifications of the original part to ensure functional replacement without circuit redesign.

Compliance and Status: All substitute parts must maintain ROHS3 compliance and be available in active product status to ensure long-term supply chain viability.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: LM393P

The LM393P is the direct functional equivalent of the LM393P-NG and is the recommended substitute for all applications currently utilizing the obsolete LM393P-NG. The LM393P maintains identical electrical specifications for all critical parameters including input offset voltage, input bias current, and operating temperature range.

Advantages of LM393P Substitution:

1. Active Product Status: The LM393P is in active production by Texas Instruments, ensuring long-term availability and supply chain continuity.

2. Extended Supply Voltage Range: The LM393P supports supply voltages up to 36V (single supply) and ±18V (dual supply), exceeding the LM393P-NG specification of 30V and ±15V respectively. This extended range provides additional design flexibility for applications with higher supply voltage requirements.

3. Enhanced Output Drive Capability: The LM393P provides 20mA typical output current compared to 6mA in the LM393P-NG, enabling direct interface with additional logic loads without external buffering.

4. Compliance Certification: The LM393P maintains ROHS3 compliance and includes REACH unaffected status, meeting current environmental and regulatory requirements.

5. Identical Package and Pinout: The 8-DIP package form factor and pin assignment are identical, allowing direct socket replacement without PCB modification.

Application Compatibility:

The LM393P is electrically and mechanically compatible with all circuit designs originally specified for the LM393P-NG. The enhanced specifications of the substitute part do not introduce incompatibility; rather, they provide improved performance margins and expanded operating range.

Frequently Asked Questions (FAQ)

Q1: Can the LM393P directly replace the LM393P-NG without circuit modification?

A: Yes. The LM393P is a direct pin-for-pin replacement with identical electrical specifications for all critical parameters. No circuit modification is required. The 8-DIP package pinout is identical, and the functional behavior is equivalent across the specified operating range.

Q2: What is the primary reason for substituting the LM393P-NG?

A: The LM393P-NG is classified as obsolete. The LM393P is the active production equivalent from Texas Instruments, ensuring continued availability and supply chain reliability for new production and legacy system support.

Q3: Are there any performance differences between the LM393P and LM393P-NG?

A: The LM393P exceeds the LM393P-NG specification in two areas: output current capability (20mA versus 6mA) and supply voltage range (36V/±18V versus 30V/±15V). These differences represent performance enhancements that do not affect compatibility. Input offset voltage, input bias current, and operating temperature specifications are identical.

Q4: Does the LM393P support the same supply voltage range as the LM393P-NG?

A: The LM393P supports an extended supply voltage range. The LM393P-NG operates at 2V to 30V (single supply) or ±1V to ±15V (dual supply). The LM393P operates at 2V to 36V (single supply) or ±1V to ±18V (dual supply). All applications designed for the LM393P-NG supply range are fully compatible with the LM393P.

Q5: Is the LM393P available in the same package as the LM393P-NG?

A: Yes. Both devices are available in the 8-DIP (0.300", 7.62mm) through-hole package with identical pinout. The LM393P is supplied in tube packaging, which is standard for active production components.

Q6: What is the difference between the LM393P-NG and LM393P packaging designations?

A: The "-NG" suffix in LM393P-NG indicates "New Generation" or a specific packaging variant from an earlier production phase. The LM393P represents the current production designation. Both devices are functionally equivalent dual comparators from Texas Instruments with identical core specifications.

Q7: Are there any compliance or certification differences between the two parts?

A: Both the LM393P-NG and LM393P are ROHS3 compliant. The LM393P additionally includes REACH unaffected status and EAR99 export classification, reflecting current regulatory documentation standards for active production components.

Q8: Can the LM393P be used in applications requiring the exact quiescent current specification of the LM393P-NG?

A: The LM393P has a maximum quiescent current of 2.5mA compared to 1mA for the LM393P-NG. For applications with strict quiescent current requirements below 2.5mA, the LM393P specification must be evaluated against the circuit design. However, the LM393P remains functionally compatible as a substitute; the higher quiescent current represents a performance trade-off rather than an incompatibility.

Q9: What inventory status should be expected for the LM393P?

A: The LM393P is in active production with substantial inventory availability (161,820 pieces reported in stock). The LM393P-NG is obsolete with limited remaining inventory (1,077 pieces). Substitution to the LM393P ensures access to current production stock.

Q10: Are there any thermal or reliability differences between the LM393P and LM393P-NG?

A: Both devices operate across the identical temperature range of 0°C to 70°C. No thermal or reliability differences are specified in the provided technical parameters. Both maintain equivalent reliability characteristics for the commercial temperature range.