LM3302D Equivalent & Substitute Parts

Part Overview

The LM3302D is a general-purpose quad comparator IC manufactured by Texas Instruments in 14-SOIC surface mount packaging. This device integrates four independent comparators with CMOS, MOS, open-collector, and TTL output compatibility, designed for analog signal comparison applications across industrial and commercial temperature ranges (-40°C to 85°C).

The LM3302D is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements. Substitute parts must maintain functional equivalence within the specified electrical and mechanical parameters while meeting current availability and compliance standards.

Key Parameters

Parameter	LM3302D Value
Number of Elements	4
Output Type	CMOS, MOS, Open-Collector, TTL
Voltage Supply (Single/Dual)	2V ~ 28V / ±1V ~ 14V
Voltage - Input Offset (Max)	20mV @ 28V
Current - Input Bias (Max)	0.5µA @ 5V
Current - Output (Typ)	20mA
Current - Quiescent (Max)	800µA
Operating Temperature	-40°C ~ 85°C
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the LM3302D is determined by the following critical parameters:

Number of Elements: Must be 4 (quad comparator configuration)
Package Type: Must be 14-SOIC or equivalent 14-pin surface mount package (0.154" or 0.173" width acceptable)
Output Type Compatibility: Must support at least one of the following: CMOS, MOS, Open-Collector, or TTL
Voltage Supply Range: Minimum single supply 2V ~ 28V or dual supply ±1V ~ 14V (wider ranges acceptable)
Input Offset Voltage: Maximum 20mV or lower (lower values indicate better performance)
Input Bias Current: Maximum 0.5µA or lower
Output Current: Minimum 16mA (LM3302D specifies 20mA typical)
Quiescent Current: Maximum 800µA or lower
Operating Temperature: Must support at least -40°C ~ 85°C range
Compliance: ROHS3 compliant, REACH unaffected

Substitute parts are grouped into two categories: direct replacements (same base product number or functionally identical) and upgraded alternatives (enhanced specifications or extended operating ranges).

Parameter Comparison

Part Number	Manufacturer	Product Status	Output Type	Voltage Supply (Single/Dual)	Input Offset (Max)	Input Bias (Max)	Output Current (Typ)	Quiescent (Max)	Temp Range	Package	Inventory
LM3302D	Texas Instruments	Obsolete	CMOS, MOS, Open-Collector, TTL	2V ~ 28V / ±1V ~ 14V	20mV @ 28V	0.5µA @ 5V	20mA	800µA	-40°C ~ 85°C	14-SOIC	2300 Pcs
LM3302DR	Texas Instruments	Active	CMOS, MOS, Open-Collector, TTL	2V ~ 28V / ±1V ~ 14V	20mV @ 28V	0.5µA @ 5V	20mA	800µA	-40°C ~ 85°C	14-SOIC	3987 Pcs
LM139AD	Texas Instruments	Last Time Buy	Open-Collector, Open-Drain	2V ~ 30V / ±1V ~ 15V	2mV @ 30V	0.1µA @ 5V	20mA	2mA	-55°C ~ 125°C	14-SOIC	1540 Pcs
LM2901AS14-13	Diodes Incorporated	Active	—	2V ~ 36V / ±1V ~ 18V	2mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	14-SOIC	12700 Pcs
BA2901SF-E2	Rohm Semiconductor	Active	Open-Collector	2V ~ 36V / ±1V ~ 18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2mA	-40°C ~ 105°C	14-SOP	15500 Pcs
LM139ADT	STMicroelectronics	Active	—	2V ~ 32V / ±1V ~ 16V	2mV @ 30V	0.1µA @ 5V	16mA @ 5V	2mA	-55°C ~ 125°C	14-SOIC	4825 Pcs
LM139DT	STMicroelectronics	Active	—	2V ~ 32V / ±1V ~ 16V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2mA	-55°C ~ 125°C	14-SOIC	18338 Pcs
LM239ADT	STMicroelectronics	Active	CMOS, DTL, ECL, MOS, Open-Collector, TTL	2V ~ 32V / ±1V ~ 16V	2mV @ 30V	0.1µA @ 5V	16mA @ 5V	2mA	-40°C ~ 105°C	14-SOIC	15360 Pcs
LM239DT	STMicroelectronics	Active	CMOS, DTL, ECL, MOS, Open-Collector, TTL	2V ~ 32V / ±1V ~ 16V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2mA	-40°C ~ 105°C	14-SOIC	47600 Pcs
LM2901DT	STMicroelectronics	Active	CMOS, DTL, ECL, MOS, Open-Collector, TTL	2V ~ 32V / ±1V ~ 16V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	14-SOIC	185200 Pcs
LM2901HYDT	STMicroelectronics	Active	CMOS, DTL, ECL, MOS, Open-Collector, TTL	2V ~ 36V / ±1V ~ 18V	—	—	—	2.5mA	Automotive Grade	14-SOIC	4310 Pcs

Engineering Selection Recommendations

Direct Replacement (Preferred)

LM3302DR is the direct replacement for LM3302D. Both parts share identical electrical specifications, the same 14-SOIC package, and equivalent output type support. LM3302DR is currently active with higher inventory availability (3987 Pcs vs. 2300 Pcs). This substitution requires no circuit redesign or validation.

Primary Alternatives (Active Status, High Availability)

LM239DT and LM2901DT from STMicroelectronics are the most suitable alternatives. Both are active products with extensive inventory (47600 Pcs and 185200 Pcs respectively). These parts maintain the 14-SOIC package, support identical output types (CMOS, DTL, ECL, MOS, Open-Collector, TTL), and operate within compatible voltage ranges (2V ~ 32V single supply). Output current specifications (16mA typical) meet the minimum 16mA requirement. Operating temperature range (-40°C ~ 105°C for LM239DT, -40°C ~ 125°C for LM2901DT) covers the original -40°C ~ 85°C specification.

Extended Temperature Range Alternative

LM139ADT and LM139DT from STMicroelectronics provide extended operating temperature range (-55°C ~ 125°C) with active product status. These parts are suitable for applications requiring lower temperature operation beyond the original -40°C specification. Input offset voltage is superior (2mV to 5mV vs. 20mV), and quiescent current is significantly lower (2mA vs. 800µA).

Upgraded Alternative (Automotive Grade)

LM2901HYDT from STMicroelectronics is an automotive-qualified variant (AEC-Q100) with extended voltage supply range (2V ~ 36V / ±1V ~ 18V) and active product status. This part is suitable for applications requiring automotive-grade reliability and qualification. Moisture sensitivity level is MSL 3 (168 Hours), requiring controlled storage conditions.

Alternative Manufacturer Option

LM2901AS14-13 from Diodes Incorporated provides an alternative source with active status and high inventory (12700 Pcs). Extended voltage supply range (2V ~ 36V / ±1V ~ 18V) and lower quiescent current (2.5mA) are beneficial for battery-powered applications.

Compliance Considerations

All recommended substitutes are ROHS3 compliant and REACH unaffected, matching the original LM3302D compliance profile. Moisture sensitivity levels range from MSL 1 (unlimited) to MSL 3 (168 Hours), requiring appropriate handling for parts with higher MSL ratings.

Frequently Asked Questions (FAQ)

Q: Can LM3302DR be used as a direct replacement for LM3302D?

A: Yes. LM3302DR is the direct equivalent with identical electrical specifications, package type (14-SOIC), and output type support. The only difference is packaging format (Tape & Reel vs. Tube) and product status (Active vs. Obsolete). No circuit modifications are required.

Q: What is the key difference between LM239DT and LM2901DT?

A: Both are quad comparators in 14-SOIC packages with identical output type support and voltage supply ranges. LM2901DT has a slightly higher input offset voltage (7mV @ 5V vs. 2mV @ 30V) and quiescent current (2.5mA vs. 2mA). LM2901DT offers significantly higher inventory availability (185200 Pcs vs. 15360 Pcs).

Q: Are the LM139 series parts compatible with LM3302D applications?

A: LM139 series parts (LM139AD, LM139ADT, LM139DT) are functionally compatible as quad comparators in 14-SOIC packages. However, output type support differs: LM139 variants support Open-Collector and Open-Drain outputs, while LM3302D supports CMOS, MOS, Open-Collector, and TTL. Verify output type requirements in your application before substitution.

Q: What is the significance of the 14-SOP package variant (BA2901SF-E2)?

A: BA2901SF-E2 uses a 14-SOP package with 0.173" width, compared to the standard 14-SOIC at 0.154" width. While both are surface mount packages with 14 pins, the slightly wider body may affect PCB layout compatibility. Verify footprint compatibility before selecting this alternative.

Q: Why does LM2901HYDT have missing electrical specifications?

A: LM2901HYDT is an automotive-grade variant (AEC-Q100 qualified) with some specifications not disclosed in standard datasheets. This part is suitable for automotive applications requiring qualification documentation. Contact the manufacturer for complete electrical characterization if required for your application.

Q: What is the impact of quiescent current differences between LM3302D (800µA) and alternatives (2mA or lower)?

A: Lower quiescent current in substitute parts (LM139 series at 2mA, LM239/LM2901 series at 2-2.5mA) indicates improved power efficiency. For battery-powered or low-power applications, these alternatives provide better performance. For standard industrial applications, the difference is negligible.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All recommended substitute parts are ROHS3 compliant and REACH unaffected, matching the original LM3302D compliance profile. Moisture sensitivity levels vary (MSL 1 to MSL 3), requiring appropriate handling and storage conditions based on the specific part selected.

Q: Can LM2901AS14-13 from Diodes Incorporated be used instead of STMicroelectronics parts?

A: Yes. LM2901AS14-13 is functionally compatible with equivalent electrical specifications and 14-SOIC packaging. Using parts from alternative manufacturers provides supply chain diversification. Verify that your procurement and quality systems support the alternative manufacturer before implementation.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message