AS339AMTR-E1 Equivalent & Substitute Parts

Part Overview

The AS339AMTR-E1 is a general-purpose comparator IC manufactured by Diodes Incorporated, featuring four independent comparators with open-collector outputs 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), making it suitable for analog signal comparison applications in industrial, consumer, and automotive environments. The part is currently active in production with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are necessary when the primary part experiences supply constraints, extended lead times, or when design requirements necessitate alternative package formats, temperature ratings, or manufacturer specifications while maintaining functional compatibility.

Key Parameters

Parameter	AS339AMTR-E1 Specification
Manufacturer	Diodes Incorporated
Number of Elements	4
Output Type	Open-Collector
Voltage Supply (Single/Dual)	2V ~ 36V, ±1V ~ 18V
Voltage - Input Offset (Max)	3mV @ 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	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the AS339AMTR-E1 are classified based on the following critical parameters that determine functional compatibility:

Core Compatibility Criteria:

Number of Elements: Must be 4 independent comparators
Output Type: Must be Open-Collector configuration
Supply Voltage Range: Must support 2V ~ 36V single supply or equivalent dual supply range
Input Offset Voltage: Maximum 3mV to 7mV @ specified test voltage
Input Bias Current: Maximum 0.25µA
Output Current: Minimum 16mA typical capability
Quiescent Current: Maximum 2mA to 2.5mA
Package Type: 14-pin surface-mount variants (SOIC, SOP, SSOP)
RoHS Compliance: ROHS3 Compliant required

Substitution Categories:

Parametric Equivalent: AS339AMTR-G1 (Diodes Incorporated) — Identical electrical specifications with alternative MSL rating and packaging designation.

Upgrade/Cross-Manufacturer Options: LM2901HYDT (STMicroelectronics), BA10339F-E2, BA2901F-E2, BA2901FV-E2, BA2901SF-E2 (Rohm Semiconductor), LM239AMDREP, LM239AQDREP, LM239AQDRG4Q1, LM239AQDRQ1 (Texas Instruments) — All meet core electrical requirements with variations in temperature rating, automotive qualification, and package format.

Parameter Comparison

Parameter	AS339AMTR-E1	AS339AMTR-G1	LM2901HYDT	BA10339F-E2	BA2901F-E2	BA2901FV-E2	LM239AQDREP	LM239AQDRG4Q1
Manufacturer	Diodes Inc.	Diodes Inc.	STMicroelectronics	Rohm Semi.	Rohm Semi.	Rohm Semi.	Texas Instruments	Texas Instruments
Number of Elements	4	4	4	4	4	4	4	4
Output Type	Open-Collector	Open-Collector	CMOS, DTL, ECL, MOS, Open-Collector, TTL	Open-Collector	Open-Collector	Open-Collector	Open-Collector	Open-Collector
Supply Voltage (Single/Dual)	2V ~ 36V, ±1V ~ 18V	2V ~ 36V, ±1V ~ 18V	2V ~ 36V, ±1V ~ 18V	3V ~ 36V, ±1.5V ~ 18V	2V ~ 36V, ±1V ~ 18V	2V ~ 36V, ±1V ~ 18V	2V ~ 36V, ±1V ~ 18V	2V ~ 36V, ±1V ~ 18V
Input Offset Voltage (Max)	3mV @ 5V	3mV @ 5V	Not specified	5mV @ 5V	7mV @ 5V	7mV @ 5V	2.5mV @ 30V	2.5mV @ 30V
Input Bias Current (Max)	0.25µA @ 5V	0.25µA @ 5V	Not specified	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 1.4V	0.25µA @ 5V
Output Current (Typ)	16mA @ 5V	16mA @ 5V	Not specified	16mA @ 5V	16mA @ 5V	16mA @ 5V	20mA	20mA
Quiescent Current (Max)	2mA	2mA	2.5mA	2mA	2mA	2mA	2mA	2mA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	Not specified	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 125°C
Package / Case	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.173", 4.40mm)	14-SOIC (0.173", 4.40mm)	14-LSSOP (0.173", 4.40mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	3 (168 Hours)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Automotive Grade	No	No	Yes (AEC-Q100)	No	No	No	No	Yes (AEC-Q100)

Engineering Selection Recommendations

Direct Replacement (Identical Specifications): AS339AMTR-G1 is the parametric equivalent with identical electrical performance. Selection between AS339AMTR-E1 and AS339AMTR-G1 depends on MSL requirements; AS339AMTR-E1 offers unlimited moisture sensitivity while AS339AMTR-G1 requires 168-hour bake-out procedures.

Cross-Manufacturer Substitutes (Electrical Compatibility):

LM239AQDREP and LM239AQDRG4Q1 (Texas Instruments) provide superior input offset voltage specification (2.5mV) and higher output current capability (20mA), with extended temperature range to 125°C. LM239AQDRG4Q1 includes AEC-Q100 automotive qualification for applications requiring automotive-grade components.

BA10339F-E2 (Rohm Semiconductor) maintains the original temperature range (-40°C to 85°C) with slightly relaxed input offset voltage (5mV) and offers unlimited MSL rating. Package width is 4.40mm versus 3.90mm for the original.

BA2901F-E2 and BA2901SF-E2 (Rohm Semiconductor) extend operating temperature to 125°C and 105°C respectively, with input offset voltage of 7mV. Both maintain 2V minimum supply voltage and unlimited MSL rating.

BA2901FV-E2 (Rohm Semiconductor) provides the same electrical specifications as BA2901F-E2 in a 14-SSOP-B package format for space-constrained applications.

LM2901HYDT (STMicroelectronics) includes AEC-Q100 automotive qualification with 2.5mA maximum quiescent current and supports the full supply voltage range. Specific input offset and bias current specifications are not provided in the datasheet reference.

Selection Criteria by Application:

Standard industrial applications: AS339AMTR-G1, BA10339F-E2
Extended temperature requirements: BA2901F-E2, LM239AQDREP, LM239AQDRG4Q1
Automotive applications: LM239AQDRG4Q1, LM2901HYDT
Space-constrained PCB layouts: BA2901FV-E2 (SSOP package)
High-precision applications: LM239AQDREP, LM239AQDRG4Q1 (2.5mV offset)

Frequently Asked Questions (FAQ)

Q: Can AS339AMTR-G1 be used as a direct replacement for AS339AMTR-E1? A: Yes. AS339AMTR-G1 is electrically identical with the same supply voltage range, input offset voltage (3mV), bias current (0.25µA), and output current (16mA). The primary difference is MSL rating; AS339AMTR-G1 requires moisture-controlled storage (168 hours maximum at 85°C/85% RH) while AS339AMTR-E1 has unlimited MSL. Both are ROHS3 compliant and operate across -40°C to 85°C.

Q: What are the package compatibility considerations when substituting with Rohm BA-series parts? A: Rohm BA10339F-E2, BA2901F-E2, and BA2901SF-E2 use 14-SOP packages with 4.40mm width versus the original 3.90mm SOIC width. Pin pitch and lead spacing remain compatible with standard 14-pin SOIC footprints, but PCB layout verification is required for high-density designs. BA2901FV-E2 uses 14-SSOP-B format and requires a different PCB footprint.

Q: Are Texas Instruments LM239 variants suitable for applications requiring the original -40°C to 85°C temperature range? A: LM239AQDREP, LM239AQDRG4Q1, and LM239AQDRQ1 all operate across -40°C to 125°C, exceeding the original temperature specification. These parts are suitable for the original temperature range and provide additional margin for extended-temperature applications. LM239AMDREP operates across -55°C to 125°C for ultra-wide temperature requirements.

Q: What is the significance of AEC-Q100 qualification on LM239AQDRG4Q1 and LM2901HYDT? A: AEC-Q100 qualification indicates the part meets automotive industry reliability standards including thermal cycling, vibration, and stress testing. These parts are suitable for automotive and mission-critical applications where component reliability documentation is required. Non-automotive-qualified parts (AS339AMTR-E1, BA10339F-E2) are not recommended for automotive designs without additional qualification.

Q: How do input offset voltage differences affect circuit performance? A: Input offset voltage determines the maximum error in comparator threshold detection. AS339AMTR-E1 specifies 3mV @ 5V, while BA2901F-E2 specifies 7mV @ 5V and LM239AQDREP specifies 2.5mV @ 30V. For precision threshold applications (±5mV tolerance or tighter), LM239AQDREP is preferred. For general-purpose applications with ±10mV tolerance, all substitutes are acceptable.

Q: Can LM2901HYDT be used in place of AS339AMTR-E1 despite incomplete datasheet specifications? A: LM2901HYDT supports the required 2V to 36V supply range and 2.5mA maximum quiescent current, meeting core requirements. However, input offset voltage, input bias current, and output current specifications are not provided in the reference data. Substitution requires verification against the complete LM2901HYDT datasheet before design implementation.

Q: What packaging considerations apply to BA2901FV-E2 in SSOP format? A: BA2901FV-E2 uses 14-SSOP-B (Shrink Small Outline Package) with 0.173" width, providing smaller footprint than standard SOIC packages. SSOP packages have tighter lead pitch (0.025" versus 0.050" for SOIC) and require PCB design modifications. This format is suitable for space-constrained applications but incompatible with standard SOIC footprints without layout redesign.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts (AS339AMTR-G1, LM2901HYDT, BA10339F-E2, BA2901F-E2, BA2901FV-E2, BA2901SF-E2, LM239AMDREP, LM239AQDREP, LM239AQDRG4Q1, LM239AQDRQ1) are ROHS3 compliant and REACH unaffected, meeting environmental regulatory requirements equivalent to the original AS339AMTR-E1.

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