LM319AMX Equivalent & Substitute Parts

Part Overview

The LM319AMX is a dual general-purpose comparator IC manufactured by Texas Instruments in 14-SOIC surface mount packaging. This device is classified as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design and procurement requirements. The LM319AMX supports multiple output types (DTL, MOS, Open-Collector, Open-Emitter, RTL, TTL) and operates across a wide supply voltage range of 5V to 36V (single supply) or ±2.5V to ±18V (dual supply), making it suitable for general-purpose comparison applications in legacy and new designs.

Substiute Parts

LM319AMX

Texas InstrumentsIn Stock: 1955LM319AMX Datasheet

Current PartRFQ

LM319AMX/NOPB

Texas InstrumentsIn Stock: 2551LM319AMX/NOPB Datasheet

DirectRFQ

LM219DT

STMicroelectronicsIn Stock: 21021LM219DT Datasheet

MFR RecommendedRFQ

LM319DT

STMicroelectronicsIn Stock: 6030LM319DT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM319AMX is determined by the following critical parameters:

• Package Compatibility: All substitute parts must use 14-SOIC surface mount packaging (0.154", 3.90mm width) to ensure PCB footprint compatibility
• Functional Equivalence: Dual comparator configuration with 2 elements required
• Output Type Compatibility: Open-Collector and Open-Emitter outputs are common across all candidates
• Supply Voltage Range: Minimum overlap of 5V to 30V (single supply) and ±2.5V to ±15V (dual supply) acceptable for most applications
• Input Offset Voltage: Maximum 8mV @ ±15V acceptable for general-purpose applications
• Input Bias Current: Maximum 1µA @ ±15V acceptable
• Quiescent Current: Maximum 12.5mA acceptable

The LM319AMX/NOPB (Texas Instruments, Active) is a direct equivalent with identical electrical specifications and RoHS3 compliance. The LM219DT (STMicroelectronics, Active) and LM319DT (STMicroelectronics, Active) are manufacturer-recommended substitutes with minor parameter variations within acceptable tolerances for general-purpose comparator applications.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: LM319AMX/NOPB (Texas Instruments)

The LM319AMX/NOPB is the direct equivalent replacement for the obsolete LM319AMX. It maintains identical electrical specifications, operating temperature range (0°C to 70°C), and supply voltage parameters. The primary advantage is RoHS3 compliance and active product status, ensuring long-term availability and supply chain stability. This part is recommended for designs requiring exact parameter matching and Texas Instruments sourcing continuity.

Secondary Substitutes: LM219DT and LM319DT (STMicroelectronics)

Both STMicroelectronics parts are manufacturer-recommended alternatives with RoHS3 compliance and active status. The LM219DT offers an extended operating temperature range (-40°C to 105°C), beneficial for industrial and automotive applications. The LM319DT maintains the original 0°C to 70°C operating range. Both parts accept reduced supply voltage maximums (30V single, ±15V dual) and slightly elevated input offset voltage specifications (4mV and 8mV respectively). These substitutes are suitable for general-purpose comparator applications where the parameter variations fall within acceptable design tolerances.

Frequently Asked Questions (FAQ)

Q: Can the LM319AMX/NOPB be used as a direct replacement for the LM319AMX?

A: Yes. The LM319AMX/NOPB is electrically and functionally identical to the LM319AMX with identical pin configuration, package dimensions (14-SOIC), and electrical specifications. The primary difference is product status (Active vs. Obsolete) and RoHS3 compliance.

Q: What are the key differences between the LM319AMX and the STMicroelectronics LM219DT?

A: The LM219DT has a reduced maximum supply voltage (30V single, ±15V dual versus 36V and ±18V), slightly higher input offset voltage (4mV versus 1mV), and an extended operating temperature range (-40°C to 105°C versus 0°C to 70°C). The 14-SOIC package and dual comparator configuration remain identical.

Q: Is the LM319DT suitable for applications requiring the full 36V supply voltage of the original LM319AMX?

A: No. The LM319DT maximum supply voltage is 30V (single) and ±15V (dual), which is lower than the original LM319AMX specification of 36V and ±18V. Applications requiring operation above 30V single supply should use the LM319AMX/NOPB.

Q: Are all substitute parts available in the same packaging?

A: Yes. All substitute parts use 14-SOIC (0.154", 3.90mm width) surface mount packaging, ensuring PCB footprint compatibility without layout modifications.

Q: Which substitute part offers the best compliance profile?

A: All three substitute parts (LM319AMX/NOPB, LM219DT, LM319DT) are RoHS3 compliant and REACH unaffected. The LM319AMX/NOPB is recommended for designs requiring Texas Instruments sourcing and exact parameter matching. The LM219DT is recommended for applications requiring extended temperature operation.

Q: Can the LM219DT be used in applications originally designed for the LM319AMX?

A: The LM219DT is suitable for most general-purpose comparator applications within its specified parameter ranges. However, designs operating above 30V supply voltage or requiring the full ±18V dual supply range must use the LM319AMX/NOPB or LM319DT. The slightly higher input offset voltage (4mV) should be evaluated against application precision requirements.