LM319M Equivalent & Substitute Parts

Part Overview

The LM319M is a general-purpose dual comparator IC manufactured by Texas Instruments in 14-SOIC surface mount packaging. This device features open-collector and open-emitter output configurations suitable for DTL, RTL, and TTL logic applications. The LM319M is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts must maintain compatibility across supply voltage ranges, output configurations, and thermal operating specifications to ensure direct functional replacement in existing circuit designs.

Substiute Parts

LM319M

Texas InstrumentsIn Stock: 1939LM319M Datasheet

Current PartRFQ

LM319M/NOPB

Texas InstrumentsIn Stock: 2050LM319M/NOPB Datasheet

DirectRFQ

LM219DT

STMicroelectronicsIn Stock: 21021LM219DT Datasheet

MFR RecommendedRFQ

LM319DT

STMicroelectronicsIn Stock: 6030LM319DT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM319M are qualified based on the following critical parameters:

• Output Configuration: All substitutes must support open-collector and open-emitter output types compatible with TTL logic families
• Package Compatibility: 14-SOIC surface mount package with 0.154" width (3.90mm) ensures PCB layout compatibility
• Supply Voltage Range: Minimum overlap of 5V ~ 30V single supply or ±2.5V ~ 15V dual supply operation
• Input Offset Voltage: Maximum 8mV specification at ±15V ensures comparable input signal discrimination
• Input Bias Current: Maximum 1µA specification maintains circuit input impedance characteristics
• Quiescent Current: Maximum 12.5mA specification ensures power consumption compatibility
• Dual Comparator Configuration: Two independent comparator elements per package

Substitutes are grouped into two categories: direct manufacturer equivalents (same manufacturer, active product status) and manufacturer-recommended alternatives (different manufacturer, active product status with enhanced specifications).

Parameter Comparison

Engineering Selection Recommendations

LM319M/NOPB (Texas Instruments): This is the direct active equivalent from the original manufacturer. It maintains identical electrical specifications and operating temperature range as the obsolete LM319M. The /NOPB suffix indicates lead-free, RoHS3-compliant packaging. This part is the preferred substitute for direct replacement in existing designs without circuit modification.

LM319DT (STMicroelectronics): This manufacturer-recommended alternative maintains the same base product number (LM319) and identical electrical specifications to the LM319M. Operating temperature range remains 0°C ~ 70°C. This part is suitable for applications where STMicroelectronics supply chain availability is preferred or where dual-source qualification is required.

LM219DT (STMicroelectronics): This alternative comparator IC offers enhanced performance specifications including lower input offset voltage (4mV vs. 8mV) and lower input bias current (0.5µA vs. 1µA). The extended operating temperature range (-40°C ~ 105°C) supports wider thermal environments. Supply voltage range is reduced to 5V ~ 30V single supply or ±2.5V ~ 15V dual supply. This part is suitable for applications requiring improved input signal discrimination or extended temperature operation, provided the reduced supply voltage range is compatible with the circuit design.

All substitute parts maintain ROHS3 compliance and identical 14-SOIC surface mount packaging, ensuring PCB layout compatibility without redesign.

Frequently Asked Questions (FAQ)

Q: Can LM319M/NOPB be used as a direct replacement for LM319M?

A: Yes. LM319M/NOPB is the active equivalent from Texas Instruments with identical electrical specifications, output configuration, and operating temperature range. The /NOPB designation indicates lead-free, RoHS3-compliant packaging. No circuit modification is required.

Q: What are the key differences between LM319DT and LM219DT?

A: Both are STMicroelectronics comparators in 14-SOIC packaging. LM319DT maintains identical specifications to the LM319M (8mV input offset, 1µA input bias, 0°C ~ 70°C operating range). LM219DT offers improved input specifications (4mV input offset, 0.5µA input bias) and extended temperature range (-40°C ~ 105°C), but with reduced maximum supply voltage (30V single supply vs. 36V).

Q: Are all substitute parts compatible with the same PCB layout?

A: Yes. All substitute parts use 14-SOIC surface mount packaging with identical pin configuration and 0.154" (3.90mm) width. No PCB layout modification is required for any of these substitutes.

Q: Which substitute part should I select for a new design?

A: For new designs, LM319M/NOPB (Texas Instruments) or LM319DT (STMicroelectronics) are recommended as they maintain the original LM319M specifications. LM219DT is suitable if the application requires lower input offset voltage, lower input bias current, or extended temperature operation within the 5V ~ 30V supply range.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. All substitute parts listed (LM319M/NOPB, LM319DT, LM219DT) are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Q: What is the supply voltage compatibility range across all substitutes?

A: The common overlap across all substitutes is 5V ~ 30V single supply or ±2.5V ~ 15V dual supply. Applications requiring supply voltages above 30V single supply or ±15V dual supply must use LM319M, LM319M/NOPB, or LM319DT.