LM319MX Equivalent & Substitute Parts

Part Overview

The LM319MX is a dual general-purpose comparator IC manufactured by onsemi, housed in a 14-SOIC surface-mount package. This device features open-collector and open-emitter outputs with DTL, RTL, and TTL compatibility, designed for applications requiring precision voltage comparison across a wide supply voltage range of 5V to 30V (single supply) or ±2.5V to ±15V (dual supply). The LM319MX is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across supply voltage ranges, input offset specifications, bias current ratings, output configurations, and package form factors.

Substiute Parts

LM319MX

onsemiIn Stock: 10467LM319MX Datasheet

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LM219DT

STMicroelectronicsIn Stock: 21021LM219DT Datasheet

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LM319AMX/NOPB

Texas InstrumentsIn Stock: 2551LM319AMX/NOPB Datasheet

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LM319DT

STMicroelectronicsIn Stock: 6030LM319DT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM319MX are qualified based on the following electrical and mechanical criteria:

Critical Compatibility Parameters:

• Number of elements: 2 comparators
• Output type: Open-collector and open-emitter configurations
• Supply voltage range: Minimum 5V to 30V (single) and ±2.5V to ±15V (dual)
• Input offset voltage: Maximum 8mV @ ±15V
• Input bias current: Maximum 1µA @ ±15V
• Quiescent current: Maximum 12.5mA
• Package form factor: 14-SOIC surface-mount
• Mounting type: Surface mount

All substitute parts listed maintain these electrical specifications within the defined operating parameters. Package compatibility ensures direct PCB layout substitution without redesign. Compliance certifications (RoHS3, REACH Unaffected) are maintained across all qualified substitutes.

Parameter Comparison

Engineering Selection Recommendations

LM219DT (STMicroelectronics): Active product status with full availability. Electrical parameters meet or exceed LM319MX specifications. Input offset voltage of 4mV is superior to the 8mV maximum of the original part. Input bias current of 0.5µA is lower than the 1µA specification. Extended operating temperature range (-40°C to 105°C) provides broader environmental coverage. Identical 14-SOIC package ensures direct PCB substitution. ROHS3 compliance maintained.

LM319AMX/NOPB (Texas Instruments): Active product with confirmed availability. Shares the LM319 base product number with the original part, ensuring functional equivalence. Superior input offset voltage specification of 1mV @ ±15V. Extended supply voltage range (5V to 36V single, ±2.5V to ±18V dual) provides additional design margin. Input bias current of 0.5µA meets lower specification. Identical 14-SOIC package and surface-mount configuration. ROHS3 compliant. Tape & Reel packaging suitable for production volumes.

LM319DT (STMicroelectronics): Active product with established supply chain. Electrical specifications match the LM319MX exactly: 8mV input offset voltage, 1µA input bias current, and 12.5mA quiescent current. Identical operating temperature range (0°C to 70°C). 14-SOIC package form factor ensures direct substitution. ROHS3 compliant. Cut Tape & Digi-Reel packaging available.

All three substitute parts maintain compliance certifications (ROHS3, REACH Unaffected) and are classified as active products, ensuring long-term availability and supply chain stability compared to the obsolete LM319MX.

Frequently Asked Questions (FAQ)

Q: Can the LM219DT replace the LM319MX in existing designs?

A: Yes. The LM219DT meets all electrical requirements of the LM319MX within the specified operating parameters. Both devices feature dual comparators in 14-SOIC packages with open-collector and open-emitter outputs. The LM219DT's superior input offset voltage (4mV vs. 8mV) and lower input bias current (0.5µA vs. 1µA) provide improved performance margins. No PCB redesign is required.

Q: What is the difference between the LM319AMX/NOPB and LM319DT?

A: Both are active substitutes for the LM319MX. The LM319AMX/NOPB (Texas Instruments) offers superior input offset voltage (1mV) and extended supply voltage range (5V to 36V single, ±2.5V to ±18V dual). The LM319DT (STMicroelectronics) provides electrical specifications identical to the original LM319MX. Selection depends on design margin requirements and supplier preference.

Q: Are all substitute parts in the same package?

A: Yes. All substitute parts use the 14-SOIC (0.154", 3.90mm Width) surface-mount package, identical to the LM319MX. Direct PCB layout substitution is possible without modification.

Q: Which substitute part has the best input offset voltage specification?

A: The LM319AMX/NOPB (Texas Instruments) specifies 1mV maximum input offset voltage @ ±15V, superior to the LM319MX (8mV) and other substitutes. This provides the tightest comparison accuracy for precision applications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All three substitute parts (LM219DT, LM319AMX/NOPB, and LM319DT) are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity ratings, matching the original LM319MX compliance profile.

Q: What is the operating temperature range difference between substitutes?

A: The LM219DT operates from -40°C to 105°C, providing extended temperature coverage. The LM319AMX/NOPB and LM319DT both operate from 0°C to 70°C, matching the original LM319MX specification. Select based on application environmental requirements.