LM293P-NG Equivalent & Substitute Parts

Part Overview

The LM293P-NG is a general-purpose comparator manufactured by Texas Instruments, featuring dual differential inputs with open-collector, rail-to-rail output configuration in an 8-PDIP package. This device is classified as obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for applications utilizing this comparator topology.

Substiute Parts

LM293P-NG

Texas InstrumentsIn Stock: 1016LM293P-NG Datasheet

Current PartRFQ

LM293P

Texas InstrumentsIn Stock: 2587LM293P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM293P-NG is determined by the following critical parameters:

Package Compatibility: Both the main part and substitute must utilize the 8-DIP (0.300", 7.62mm) through-hole package to ensure direct PCB footprint compatibility without layout modifications.

Functional Equivalence: The substitute must provide dual differential comparator elements with open-collector output configuration and rail-to-rail output capability to maintain circuit functionality.

Supply Voltage Range: The substitute supply voltage range must encompass or exceed the original specification (2V ~ 30V single supply, ±1V ~ 15V dual supply) to ensure operation across the intended application envelope.

Input Offset Voltage: The substitute input offset voltage specification must not exceed the original maximum of 5mV @ 30V to preserve signal detection accuracy.

Input Bias Current: The substitute input bias current must not exceed 0.25µA @ 5V to maintain circuit performance and minimize loading effects.

Operating Temperature Range: The substitute must support the full operating temperature range of -25°C ~ 85°C.

Compliance Standards: The substitute must maintain ROHS3 compliance status to satisfy regulatory and procurement requirements.

The LM293P (without the -NG suffix) qualifies as a direct substitute based on these criteria.

Parameter Comparison

Engineering Selection Recommendations

The LM293P serves as the direct substitute for the obsolete LM293P-NG. The primary advantage of selecting LM293P is its active product status, ensuring long-term availability and supply chain continuity. Both devices share identical package geometry, pin configuration, and core electrical specifications including input offset voltage and input bias current.

The LM293P provides enhanced specifications in several parameters: supply voltage range extends to 36V single supply and ±18V dual supply (compared to 30V and ±15V respectively), output current capability increases to 20mA typical (from 6mA), and quiescent current maximum is 2.5mA (from 1mA). These improvements provide greater design margin and flexibility for output drive requirements without compromising compatibility.

Both devices maintain ROHS3 compliance, satisfying regulatory requirements for new designs and production continuity. The transition from LM293P-NG to LM293P requires no PCB layout modifications and presents no functional incompatibility for applications operating within the original LM293P-NG specifications.

Frequently Asked Questions (FAQ)

Q: Can LM293P directly replace LM293P-NG without PCB modifications?

A: Yes. Both devices utilize identical 8-DIP (0.300", 7.62mm) through-hole packaging with matching pin configurations. Direct socket substitution is possible without layout changes.

Q: What is the primary reason for substituting LM293P-NG?

A: LM293P-NG is classified as obsolete product status. LM293P is the active equivalent from the same manufacturer, ensuring continued availability and supply reliability.

Q: Are there electrical compatibility concerns when substituting LM293P for LM293P-NG?

A: No electrical incompatibility exists for applications designed to the LM293P-NG specifications. LM293P provides equal or superior performance across all critical parameters: input offset voltage, input bias current, and operating temperature range remain identical. Supply voltage range and output current capability are enhanced in LM293P.

Q: Does the increased output current (20mA vs. 6mA) in LM293P affect circuit design?

A: The increased output current capability in LM293P is a performance enhancement that does not negatively impact existing designs. Circuits designed for 6mA output current will operate correctly with the higher 20mA capability. No design modifications are required.

Q: Are both devices RoHS compliant?

A: Yes. Both LM293P-NG and LM293P maintain ROHS3 compliance status, satisfying regulatory requirements for procurement and production.

Q: What packaging options are available for LM293P?

A: LM293P is supplied in Tube packaging. The device maintains the 8-PDIP through-hole package configuration identical to LM293P-NG.