LM319MX Equivalent & Substitute Parts

Part Overview

The LM319MX is a general-purpose dual comparator IC manufactured by Texas Instruments, housed in a 14-SOIC surface-mount package. This device features open-collector and open-emitter output configurations suitable for DTL, RTL, and TTL logic applications. The LM319MX is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. Active alternatives with compatible electrical and mechanical specifications are available from both Texas Instruments and STMicroelectronics.

Substiute Parts

LM319MX

Texas InstrumentsIn Stock: 10485LM319MX Datasheet

Current PartRFQ

LM319MX/NOPB

Texas InstrumentsIn Stock: 16691LM319MX/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 LM319MX are classified based on strict electrical and mechanical compatibility criteria:

Direct Equivalent (Same Base Product): LM319MX/NOPB is the direct equivalent from Texas Instruments, maintaining identical electrical specifications and the same 14-SOIC package footprint. This part differs only in product status (Active vs. Obsolete) and RoHS compliance (ROHS3 Compliant vs. non-compliant), with an expanded supply voltage range (5V ~ 36V vs. 5V ~ 30V for single supply).

Cross-Manufacturer Substitutes (Compatible Electrical Parameters): LM319DT (STMicroelectronics) and LM219DT (STMicroelectronics) are functionally equivalent comparators with matching output types, package configurations, and core electrical specifications. Both maintain the 14-SOIC package footprint and surface-mount compatibility. These parts are classified as Active products with ROHS3 compliance.

Substitution Logic: All substitute parts share the following critical parameters with the LM319MX:

• Dual comparator configuration (2 elements)
• 14-SOIC surface-mount package
• Open-collector and open-emitter output capability
• TTL/DTL logic compatibility
• Supply voltage range overlap (minimum 5V ~ 30V)
• Input offset voltage specification (≤8mV @ ±15V)
• Input bias current specification (≤1µA @ ±15V)
• Quiescent current specification (≤12.5mA)
• MSL rating of 1 (Unlimited)

Parameter Comparison

Engineering Selection Recommendations

LM319MX/NOPB (Texas Instruments): This is the primary recommended substitute for the obsolete LM319MX. It maintains full electrical compatibility with identical specifications and the same 14-SOIC package footprint. The LM319MX/NOPB is an Active product with ROHS3 compliance, addressing regulatory requirements for new designs. The expanded supply voltage range (5V ~ 36V single supply vs. 5V ~ 30V) and dual supply range (±2.5V ~ 18V vs. ±2.5V ~ 15V) provide additional design flexibility. This part is suitable for direct replacement in existing designs without circuit modification.

LM319DT (STMicroelectronics): This substitute maintains electrical equivalence with the LM319MX across all critical parameters. The LM319DT is an Active product with ROHS3 compliance and identical operating temperature range (0°C ~ 70°C). It is suitable for applications requiring cross-manufacturer sourcing or when Texas Instruments parts are unavailable. The 14-SOIC package ensures PCB footprint compatibility.

LM219DT (STMicroelectronics): This substitute offers improved electrical performance with lower input offset voltage (4mV vs. 8mV) and reduced input bias current (0.5µA vs. 1µA). The LM219DT features an extended operating temperature range (-40°C ~ 105°C vs. 0°C ~ 70°C), making it suitable for applications requiring wider temperature operation. This part is an Active product with ROHS3 compliance. The LM219DT is recommended when enhanced performance specifications or extended temperature range are required.

All substitute parts are REACH Unaffected and classified under ECCN EAR99 with HTSUS code 8542.39.0001, maintaining regulatory consistency with the original LM319MX.

Frequently Asked Questions (FAQ)

Q: Can LM319MX/NOPB be used as a direct replacement for LM319MX? A: Yes. The LM319MX/NOPB is electrically and mechanically equivalent to the LM319MX. Both parts share identical electrical specifications, the same 14-SOIC package footprint, and surface-mount configuration. No circuit modifications are required for substitution.

Q: What is the primary difference between LM319MX and LM319MX/NOPB? A: The LM319MX is classified as Obsolete with RoHS non-compliance, while LM319MX/NOPB is an Active product with ROHS3 compliance. The LM319MX/NOPB also features an expanded supply voltage range (5V ~ 36V single supply and ±2.5V ~ 18V dual supply vs. 5V ~ 30V and ±2.5V ~ 15V respectively).

Q: Are STMicroelectronics LM319DT and LM219DT compatible with the LM319MX? A: Yes, both parts are compatible substitutes. They maintain the same 14-SOIC package footprint, dual comparator configuration, and core electrical specifications. Both are Active products with ROHS3 compliance.

Q: What are the key differences between LM319DT and LM219DT? A: The LM219DT offers superior electrical performance with lower input offset voltage (4mV vs. 8mV) and reduced input bias current (0.5µA vs. 1µA). The LM219DT also features an extended operating temperature range (-40°C ~ 105°C vs. 0°C ~ 70°C). Both parts are electrically compatible with the LM319MX within their specified ranges.

Q: Does package compatibility guarantee functional substitution? A: Package compatibility is necessary but not sufficient for substitution. All substitute parts must also match critical electrical parameters including supply voltage range, output type, input offset voltage, input bias current, and quiescent current specifications. All listed substitutes meet these requirements.

Q: Are there any compliance or regulatory differences between the substitute parts? A: All substitute parts (LM319MX/NOPB, LM319DT, and LM219DT) are ROHS3 compliant and REACH Unaffected, addressing modern regulatory requirements. The original LM319MX is RoHS non-compliant. All parts share identical MSL ratings (1 - Unlimited) and ECCN/HTSUS classifications.

Q: Which substitute should be selected for new designs? A: LM319MX/NOPB is the recommended choice for new designs, as it provides direct electrical and mechanical equivalence with the LM319MX while offering Active product status and ROHS3 compliance. LM219DT is recommended when extended temperature range (-40°C ~ 105°C) or improved electrical performance specifications are required.