AS339MTR-E1 Equivalent & Substitute Parts

Part Overview

The AS339MTR-E1 is a general-purpose comparator IC manufactured by Diodes Incorporated, featuring four independent comparators in a 14-SOIC surface-mount package. This device operates across a wide supply voltage range of 2V to 36V (single supply) or ±1V to ±18V (dual supply), with open-collector outputs suitable for logic-level interfacing. The part is Active status and RoHS3 compliant, making it suitable for industrial and commercial applications requiring precision voltage comparison.

Equivalent and substitute parts are identified based on matching functional characteristics: four-element general-purpose comparator topology, open-collector output configuration, compatible supply voltage ranges, and surface-mount packaging in 14-pin configurations. Substitutes maintain electrical performance within specified tolerances while accommodating minor variations in package dimensions, temperature ratings, and quiescent current specifications.

Key Parameters

Parameter	AS339MTR-E1 Specification
Manufacturer	Diodes Incorporated
Category	Linear - Comparator
Type	General Purpose
Number of Elements	4
Output Type	Open-Collector
Voltage Supply (Single/Dual)	2V ~ 36V / ±1V ~ 18V
Voltage - Input Offset (Max)	5mV @ 5V
Current - Input Bias (Max)	0.25µA @ 5V
Current - Output (Typ)	16mA @ 5V
Current - Quiescent (Max)	2mA
Operating Temperature	-40°C ~ 85°C
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	3 (168 Hours)
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the AS339MTR-E1 are classified based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

Four independent comparator elements
Open-collector output configuration
Supply voltage range: 2V ~ 36V (single) or ±1V ~ ±18V (dual)
Input offset voltage: ≤ 7mV @ specified test voltage
Input bias current: ≤ 0.25µA @ specified test voltage
Output current capability: ≥ 16mA @ 5V
Quiescent current: ≤ 2.5mA
Surface-mount 14-pin package (SOIC, SOP, or SSOP variants)
Operating temperature range: minimum -40°C, maximum ≥ 85°C

Secondary Considerations:

Package width tolerance (0.154" to 0.173")
Moisture sensitivity level (MSL 1 or 3)
RoHS3 compliance
Product status (Active)

Substitutes are grouped into two categories: direct pin-compatible replacements with identical electrical performance, and functional equivalents with minor parameter variations that remain within acceptable design margins for general-purpose comparator applications.

Parameter Comparison

Part Number	Manufacturer	Package	Supply Voltage	Input Offset (Max)	Output Current (Typ)	Quiescent Current (Max)	Temp Range	RoHS Status
AS339MTR-E1	Diodes Inc.	14-SOIC (3.90mm)	2V~36V / ±1V~18V	5mV @ 5V	16mA @ 5V	2mA	-40°C ~ 85°C	ROHS3
LM2901HYDT	STMicroelectronics	14-SO (3.90mm)	2V~36V / ±1V~18V	—	—	2.5mA	—	ROHS3
BA10339F-E2	Rohm Semiconductor	14-SOP (4.40mm)	3V~36V / ±1.5V~18V	5mV @ 5V	16mA @ 5V	2mA	-40°C ~ 85°C	ROHS3
BA2901F-E2	Rohm Semiconductor	14-SOP (4.40mm)	2V~36V / ±1V~18V	7mV @ 5V	16mA @ 5V	2mA	-40°C ~ 125°C	ROHS3
BA2901FV-E2	Rohm Semiconductor	14-SSOP (4.40mm)	2V~36V / ±1V~18V	7mV @ 5V	16mA @ 5V	2mA	-40°C ~ 125°C	ROHS3
BA2901SF-E2	Rohm Semiconductor	14-SOP (4.40mm)	2V~36V / ±1V~18V	7mV @ 5V	16mA @ 5V	2mA	-40°C ~ 105°C	ROHS3
LM239AMDREP	Texas Instruments	14-SOIC (3.90mm)	2V~36V / ±1V~18V	2.5mV @ 1.4V	20mA	2mA	-55°C ~ 125°C	ROHS3
LM239AQDREP	Texas Instruments	14-SOIC (3.90mm)	2V~36V / ±1V~18V	2.5mV @ 30V	20mA	2mA	-40°C ~ 125°C	ROHS3
LM239AQDRG4Q1	Texas Instruments	14-SOIC (3.90mm)	2V~36V / ±1V~18V	2.5mV @ 30V	20mA	2mA	-40°C ~ 125°C	ROHS3
LM239AQDRQ1	Texas Instruments	14-SOIC (3.90mm)	2V~36V / ±1V~18V	2.5mV @ 30V	20mA	2mA	-40°C ~ 125°C	ROHS3
LM239DR2G	onsemi	14-SOIC (3.90mm)	3V~36V / ±1.5V~18V	5mV @ 5V	16mA @ 5V	2.5mA	-25°C ~ 85°C	ROHS3

Engineering Selection Recommendations

Direct Pin-Compatible Substitutes (Identical 14-SOIC 3.90mm Package):

LM239AMDREP, LM239AQDREP, LM239AQDRG4Q1, and LM239AQDRQ1 (Texas Instruments) provide direct pin-for-pin compatibility with the AS339MTR-E1. These parts maintain the same 14-SOIC package footprint, supply voltage range, and output current specifications. The LM239 series offers superior input offset voltage performance (2.5mV vs. 5mV) and extended temperature ratings up to 125°C. LM239AQDRG4Q1 and LM239AQDRQ1 include AEC-Q100 automotive qualification, suitable for applications requiring automotive-grade reliability.

Package-Compatible Substitutes (14-Pin SOP/SSOP Variants):

BA2901F-E2, BA2901FV-E2, and BA2901SF-E2 (Rohm Semiconductor) offer functional equivalence with wider 14-SOP and 14-SSOP packages (4.40mm width). These parts maintain identical electrical performance and extended temperature ratings (-40°C to 125°C or 105°C). The BA2901FV-E2 in 14-SSOP package provides space-constrained PCB layouts. All Rohm BA2901 variants feature MSL 1 rating (unlimited moisture exposure) compared to the AS339MTR-E1 MSL 3 rating.

BA10339F-E2 (Rohm Semiconductor) provides the closest electrical match with 5mV input offset voltage and 16mA output current, though with a slightly higher minimum supply voltage (3V vs. 2V single supply).

Automotive-Qualified Alternative:

LM2901HYDT (STMicroelectronics) is AEC-Q100 qualified and maintains the 2V~36V supply range with 2.5mA quiescent current specification. This part is suitable for automotive applications requiring certified component traceability.

Selection Criteria by Application:

Standard industrial applications: BA2901F-E2 or LM239AQDREP
Automotive applications: LM239AQDRG4Q1, LM239AQDRQ1, or LM2901HYDT
Extended temperature range: LM239AMDREP (-55°C to 125°C)
Space-constrained designs: BA2901FV-E2 (14-SSOP)
Direct footprint replacement: LM239 series (14-SOIC 3.90mm)

Frequently Asked Questions (FAQ)

Q: Can I use LM239AQDREP as a direct replacement for AS339MTR-E1?

A: Yes. Both parts feature identical 14-SOIC (0.154", 3.90mm) packages, matching pin configurations, and compatible supply voltage ranges (2V~36V / ±1V~18V). The LM239AQDREP offers superior input offset voltage performance (2.5mV vs. 5mV) and extended operating temperature range (-40°C to 125°C vs. -40°C to 85°C), making it a direct upgrade.

Q: What is the difference between BA2901F-E2 and BA10339F-E2?

A: Both are Rohm Semiconductor comparators with four elements and open-collector outputs. The primary difference is minimum supply voltage: BA10339F-E2 requires 3V minimum (single supply) while BA2901F-E2 operates from 2V. The BA10339F-E2 matches the AS339MTR-E1 input offset voltage specification (5mV @ 5V), while BA2901F-E2 specifies 7mV @ 5V. For applications requiring 2V operation, use BA2901F-E2.

Q: Are the Rohm BA2901 variants (F-E2, FV-E2, SF-E2) electrically interchangeable?

A: Yes, electrically. All three variants maintain identical electrical specifications: 2V~36V supply range, 7mV input offset voltage, 16mA output current, and 2mA quiescent current. The differences are package format (14-SOP vs. 14-SSOP) and temperature rating (BA2901SF-E2 is -40°C to 105°C, while F-E2 and FV-E2 extend to 125°C). Select based on PCB layout requirements and thermal environment.

Q: Can I substitute LM239DR2G for AS339MTR-E1 in a 2V supply application?

A: No. LM239DR2G requires minimum 3V supply voltage (single supply), while AS339MTR-E1 operates from 2V. Additionally, LM239DR2G has a narrower operating temperature range (-25°C to 85°C vs. -40°C to 85°C). Use this part only in applications with 3V or higher supply voltage.

Q: What does AEC-Q100 qualification mean for LM239AQDRG4Q1 and LM239AQDRQ1?

A: AEC-Q100 is an automotive electronics qualification standard ensuring component reliability under automotive environmental and operational stresses. These parts are suitable for automotive applications requiring certified component traceability and reliability documentation. Non-automotive applications do not require this qualification.

Q: Why does LM2901HYDT show no input offset voltage specification?

A: The LM2901HYDT datasheet does not provide input offset voltage in the supplied specification data. Verify complete electrical specifications in the manufacturer's datasheet before selection for precision applications requiring defined input offset performance.

Q: Is MSL rating important for my application?

A: MSL (Moisture Sensitivity Level) rating affects component handling and storage. AS339MTR-E1 has MSL 3 (168-hour limit before reflow), while most Rohm substitutes have MSL 1 (unlimited). MSL 1 parts are more forgiving in manufacturing environments with extended storage or high-humidity conditions. For standard manufacturing processes, both ratings are acceptable.

Q: Can I use BA2901FV-E2 (14-SSOP) on a PCB designed for 14-SOIC?

A: No. While both are 14-pin packages, SSOP and SOIC have different pin pitch and body dimensions. BA2901FV-E2 requires a dedicated 14-SSOP footprint. Use BA2901F-E2 or BA2901SF-E2 (14-SOP) for SOIC-compatible layouts, or redesign the PCB footprint for SSOP if using BA2901FV-E2.

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