AS339P-E1 Equivalent & Substitute Parts

Part Overview

The AS339P-E1 is a 4-channel general purpose comparator manufactured by Diodes Incorporated in 14-DIP packaging. This device features open-collector outputs and operates across a wide supply voltage range of 2V to 36V, making it suitable for analog signal comparison applications in industrial and consumer electronics.

The AS339P-E1 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance of systems utilizing this comparator.

Key Parameters

Parameter	Value
Manufacturer	Diodes Incorporated
Part Number	AS339P-E1
Category	Linear - Comparator
Type	General Purpose
Number of Elements	4
Output Type	Open-Collector
Voltage Supply Range	2V ~ 36V
Voltage - Input Offset (Max)	5V @ 30V
Current - Input Bias (Max)	0.25µA @ 5V
Current - Output (Typ)	16mA
Current - Quiescent (Max)	4.6mA
Operating Temperature	-40°C ~ 85°C
Package / Case	14-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the AS339P-E1 are selected based on the following critical parameters that determine functional compatibility:

Core Electrical Parameters:

Number of Elements: 4 channels
Output Type: Open-Collector configuration
Voltage Supply Range: Minimum 2V ~ 36V support (or compatible subset)
Input Bias Current: 0.25µA @ 5V
Output Current: 16mA typical capability
Input Offset Voltage: Within specified range

Packaging & Mounting Considerations:

Through-hole 14-DIP packages maintain direct PCB compatibility
Surface-mount alternatives (14-SOP, 14-SSOP, 14-QFN) require board redesign but offer equivalent electrical performance

Compliance & Status:

RoHS3 compliance maintained across all substitutes
Active product status preferred for long-term availability

Substitutes are grouped by package type: through-hole DIP equivalents, surface-mount SOP/SSOP variants, and compact QFN options. Each maintains the 4-channel open-collector comparator architecture with compatible electrical specifications.

Parameter Comparison

Parameter	AS339P-E1	BA2901F-E2	BA2901SF-E2	BA2901SFV-E2	LM2901N/NOPB	LMV339IRUCR	LMV339M/NOPB
Manufacturer	Diodes Inc.	Rohm Semi.	Rohm Semi.	Rohm Semi.	Texas Inst.	Texas Inst.	Texas Inst.
Number of Elements	4	4	4	4	4	4	4
Output Type	Open-Collector	Open-Collector	Open-Collector	Open-Collector	Open-Collector	Open-Collector	CMOS, Open-Collector, TTL
Voltage Supply Range	2V ~ 36V	2V ~ 36V, ±1V ~ 18V	2V ~ 36V, ±1V ~ 18V	2V ~ 36V, ±1V ~ 18V	2V ~ 36V, ±1V ~ 18V	2.7V ~ 5.5V	2.7V ~ 5.5V
Input Offset Voltage (Max)	5V @ 30V	7mV @ 5V	7mV @ 5V	7mV @ 5V	7mV @ 30V	7mV @ 5V	7mV @ 5V
Input Bias Current (Max)	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V
Output Current (Typ)	16mA	16mA @ 5V	16mA @ 5V	16mA @ 5V	16mA @ 5V	84mA @ 5V	84mA @ 5V
Quiescent Current (Max)	4.6mA	2mA	2mA	2mA	2.5mA	350µA	300µA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 85°C
Package / Case	14-DIP (0.300", 7.62mm)	14-SOIC (0.173", 4.40mm)	14-SOIC (0.173", 4.40mm)	14-LSSOP (0.173", 4.40mm)	14-DIP (0.300", 7.62mm)	14-XFQFN	14-SOIC (0.154", 3.90mm)
Mounting Type	Through Hole	Surface Mount	Surface Mount	Surface Mount	Through Hole	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active	Active	Last Time Buy	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Through-Hole DIP Replacement (Direct PCB Compatibility):

LM2901N/NOPB from Texas Instruments is the primary through-hole substitute. It maintains the 14-DIP package format identical to the AS339P-E1, enabling direct socket replacement without PCB redesign. Both devices support the full 2V ~ 36V supply range and share equivalent electrical characteristics. LM2901N/NOPB is actively produced, ensuring long-term availability and supply chain stability.

Surface-Mount SOP/SSOP Alternatives (Board Redesign Required):

BA2901F-E2, BA2901SF-E2, and BA2901SFV-E2 from Rohm Semiconductor provide surface-mount options with enhanced temperature ratings (-40°C ~ 125°C and -40°C ~ 105°C respectively). These parts maintain full electrical compatibility with the AS339P-E1 while offering reduced quiescent current (2mA versus 4.6mA). Package selection depends on PCB layout constraints: BA2901F-E2 and BA2901SF-E2 use 14-SOP, while BA2901SFV-E2 uses 14-SSOP-B for higher density applications.

Compact QFN Option (Specialized Applications):

LMV339IRUCR from Texas Instruments offers a 14-QFN (2x2) package for space-constrained designs. This device operates within a narrower supply range (2.7V ~ 5.5V) and features significantly higher output current capability (84mA versus 16mA) and lower quiescent current (350µA). Product status is Last Time Buy, indicating limited future availability.

Low-Power SOIC Alternative:

LMV339M/NOPB from Texas Instruments provides a 14-SOIC package with enhanced output current (84mA) and reduced quiescent current (300µA). Operating range is restricted to 2.7V ~ 5.5V. This device is actively produced and suitable for low-power applications requiring surface-mount packaging.

All recommended substitutes maintain ROHS3 compliance and open-collector output architecture. Selection should prioritize active product status for new designs and long-term supply assurance.

Frequently Asked Questions (FAQ)

Q: Can I directly replace AS339P-E1 with a surface-mount alternative without modifying my PCB?

A: No. The AS339P-E1 uses through-hole 14-DIP packaging. Surface-mount substitutes (BA2901 series, LMV339M/NOPB) require PCB redesign and new footprints. For direct socket replacement, use LM2901N/NOPB, which maintains identical 14-DIP through-hole packaging.

Q: What is the key difference between BA2901F-E2, BA2901SF-E2, and BA2901SFV-E2?

A: All three are Rohm Semiconductor 4-channel comparators with identical electrical specifications. The primary differences are package type (BA2901F-E2 and BA2901SF-E2 use 14-SOP; BA2901SFV-E2 uses 14-SSOP-B) and maximum operating temperature (BA2901F-E2 supports -40°C ~ 125°C; BA2901SF-E2 and BA2901SFV-E2 support -40°C ~ 105°C). Select based on PCB layout requirements and thermal specifications.

Q: Why do LMV339IRUCR and LMV339M/NOPB have different supply voltage ranges than the AS339P-E1?

A: LMV339 series devices are optimized for low-voltage applications and operate within 2.7V ~ 5.5V. The AS339P-E1 supports extended voltage operation up to 36V. If your application requires voltages above 5.5V, use BA2901 series or LM2901N/NOPB substitutes instead.

Q: What does "Last Time Buy" status mean for LMV339IRUCR?

A: Last Time Buy indicates the manufacturer has announced end-of-life for this product. Existing inventory may be available, but no new production is planned. For new designs or long-term production, select actively produced alternatives such as BA2901F-E2, BA2901SF-E2, or LM2901N/NOPB.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All recommended substitutes maintain ROHS3 compliance, matching the environmental and regulatory status of the AS339P-E1.

Q: Can I use LMV339IRUCR or LMV339M/NOPB in a circuit designed for 36V operation?

A: No. LMV339 series devices are rated for maximum 5.5V supply voltage. Exceeding this specification will damage the device. For 36V operation, use BA2901 series or LM2901N/NOPB, which support the full 2V ~ 36V range.

Q: What is the difference in output current capability between substitutes?

A: BA2901 series and LM2901N/NOPB provide 16mA typical output current, matching the AS339P-E1. LMV339IRUCR and LMV339M/NOPB provide 84mA typical output current, suitable for applications requiring higher drive capability. Select based on load requirements.

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