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Texas Instruments LM2901AVQDRG4Q1 — Analog & Data Acquisition
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Texas Instruments / Analog & Data Acquisition

LM2901AVQDRG4Q1 Quad Differential Comparator, AEC-Q100

MPN LM2901AVQDRG4Q1
Active Spot Stock · 24-48h Dispatch 100% Original Sealed

Texas Instruments LM2901AVQDRG4Q1, Automotive AEC-Q100, Quad Differential Comparator, 14-SOIC (0.154", 3.90mm Width), -40°C to 125°C, 2V to 36V supply, Open-Collector Output.

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MOQ: 1 pcs
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[SPEC] Essential Parameters Snapshot Full Specifications (13)
Package / Case 14-SOIC (0.154", 3.90mm Width)
Supply Voltage 2V ~ 36V, ±1V ~ 18V
ALT
Facing long factory lead times or allocation on LM2901AVQDRG4Q1? Verified pin-compatible alternatives available with active Shenzhen stock and 100% solder-ready footprint match.
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Full Technical Specifications

13 Parameters
LM2901AVQDRG4Q1 specifications
Parameter / AttributeSpecification / Value
TypeDifferential
SeriesAutomotive, AEC-Q100
Output typeCMOS, MOS, Open-Collector, TTL
MountingSurface Mount
Voltage - input offset2mV @ 5V
Voltage - supply, single (Dual (±))2V ~ 36V, ±1V ~ 18V
Output current20mA
Current - quiescent2.5mA
Current - input bias0.25µA @ 5V
Operating temperature-40°C~125°C
PackageTape & Reel (TR); Cut Tape (CT)
Case14-SOIC (0.154\", 3.90mm Width)
Number of elements4
100% Footprint Match · Solder-Ready (No PCB Redesign Needed)

Need Stock or a Drop-in Second-Source for LM2901AVQDRG4Q1?

Package: DIP-14 / SOIC-14 · Pin-compatible replacements with immediate Shenzhen spot stock

Footprint Match 99%
Supply Chain & Allocation Reality:

The LM339 is the quad comparator - four open-collector channels in a 14-pin body, ground-sensing inputs, single-supply operation, and window/threshold duty in everything from battery chargers to appliance boards. The family is a temperature ladder wearing different numbers: LM139 military, LM239 industrial, LM339 commercial, LM2901 automotive-extended, all electrically identical and pin-identical, with the newer B-generation documented as a drop-in across the row. And the constant companion of this page is the part it is NOT: the LM324 quad op-amp, whose same-size 14-pin body has a different pinout and a linear output - the pair that every electronics course warns about and every parts drawer still manages to mix.

Verified Pin-Compatible Replacements (4 verified alternatives)

LM2901 TI / onsemi DIP-14 / SOIC-14
100% Drop-in (Zero Code Change)
Availability & Target Pricing:

The Wide-Temperature Grade of the Same Quad

Shenzhen Spot Stock (24-48h Dispatch)

Electrical & Core Specs:

The automotive/extended grade (-40 to +125C class) of the identical quad comparator: same channels, same open-collector outputs, same 14-pin map.

Wide single/dual supply (2V to 30V class); the grade moves temperature coverage, not function.

Compatibility & Drop-In Notes: The substitution direction here is free in both senses where the supply allows: grades are the same circuit over different temperature windows. In hot enclosures the commercial part in an extended-grade socket is the substitution that works at the bench and drifts in the field.
Package & Solder Footprint: Identical 14-pin pinout across every grade.
Shenzhen Warehouse Stock & MOQ: Deep multi-fab stock across the ladder.
Request Volume Quote for LM2901 Compare LM2901AVQDRG4Q1 vs LM2901 Spec Matrix
LM339B Texas Instruments DIP-14 / SOIC-14
100% Drop-in (Zero Code Change)
Availability & Target Pricing:

The Current-Generation Drop-In

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Electrical & Core Specs:

The B-generation: documented as a drop-in for the A and V versions with a higher supply ceiling (about 38V), better ESD structure, tighter offset (0.37mV class) and faster response (about 1us) on the same pinout.

38V-class maximum against the standard 30-36V window - margin added, nothing removed.

Compatibility & Drop-In Notes: For new stock and new builds the B is the part to standardize on; in legacy circuits it behaves like the original within the original rails. One review point remains the same as any comparator swap: the open-collector pull-up and any RC hysteresis network were sized for the original input characteristics.
Package & Solder Footprint: DIP-14 / SOIC-14, pin-identical.
Shenzhen Warehouse Stock & MOQ: Active TI production; the long-term buy.
Request Volume Quote for LM339B Compare LM2901AVQDRG4Q1 vs LM339B Spec Matrix
LM393 TI / onsemi DIP-8
Functional Equivalent
Availability & Target Pricing:

The Dual Sibling - Same Core, Half the Channels

Shenzhen Spot Stock (24-48h Dispatch)

Electrical & Core Specs:

The dual (8-pin) member of the same comparator core: identical per-channel behavior, its own grade ladder (LM193/293/393/2903).

Same electrical envelope per channel.

Compatibility & Drop-In Notes: Listed for the map, not as a socket substitute: 8 pins against 14. Its practical role on this page is the reminder that channel count is the package - the comparator core is the family.
Package & Solder Footprint: DIP-8 against DIP-14.
Shenzhen Warehouse Stock & MOQ: Commodity stock; the everyday dual.
Request Volume Quote for LM393 Compare LM2901AVQDRG4Q1 vs LM393 Spec Matrix
LM324 TI / STMicroelectronics DIP-14 / SOIC-14
Functional Equivalent
Availability & Target Pricing:

The Lookalike That Is Not - Documented Here

Shenzhen Spot Stock (24-48h Dispatch)

Electrical & Core Specs:

The quad OP-AMP in the same-size 14-pin family: linear push-pull output against the comparators open collector, and a different pin map (supply on pins 4 and 11 against the LM339s 3 and 12).

Same broad supply envelope, different roles.

Compatibility & Drop-In Notes: The trap this page exists to prevent: an LM324 slipped into an LM339 socket (or the reverse) fails on three axes at once - pinout, output topology and compensation. Comparators compare; op-amps amplify. The visual similarity of the 14-pin bodies is the entire hazard.
Package & Solder Footprint: Same body size, different pin functions: never a socket substitute in either direction.
Shenzhen Warehouse Stock & MOQ: The complementary stock row for mixed-signal repair.
Request Volume Quote for LM324 Compare LM2901AVQDRG4Q1 vs LM324 Spec Matrix
Buyer & Quality Checklist for Sourcing Alternatives
  • Grades are temperature, not function: LM139/LM239/LM339/LM2901 are the same quad over military, industrial, commercial and extended windows. Substitutions across grades are electrically free - match the environment.
  • The B-generation (LM339B) is documented as a drop-in with a higher supply ceiling and tighter specs; there is no direction of substitution where the older part is preferred except exact-replacement documentation.
  • Open-collector outputs mean the pull-up resistor is the design: its value and its rail set the logic swing, the speed and the dissipation. Changing comparators without checking the pull-up is how edge-rate problems are born.
  • Ground-sensing inputs and a common-mode window that excludes the positive rail: sensor thresholds near the positive supply need a divider, not hope.
  • The LM324 warning runs in both directions: comparator sockets and op-amp sockets in 14-pin bodies are different worlds. Verify the part number letter by letter before insertion.
  • Hysteresis is external and intentional: in circuits that chatter near the threshold, the positive-feedback resistor is the fix - swapping comparators never removes the need for it.
Frequently Asked Technical Questions

Q: What is the difference between LM339 and LM2901?

A: Temperature grade only: LM339 is the commercial part, LM2901 covers the extended/automotive range. Same quad comparator, same 14-pin map, same open-collector outputs.

Q: Can I use an LM324 in place of an LM339?

A: No - and the failure is complete: different pinout (supply on 4/11 against 3/12), linear push-pull output against the comparators open collector, and internal compensation against none. The same-size body is the only shared property.

Q: Is LM339B a drop-in for LM339?

A: Yes - the B-generation is documented as a drop-in for the A and V versions, adding supply headroom (about 38V), better ESD and tighter offset on the same pinout. Re-check the pull-up and hysteresis network as with any comparator change.

Technical Details & Description

What the ratings mean for the BOM

The 2.5 mA maximum quiescent current per package is modest for a quad comparator — it keeps the thermal load low in a sealed ECU, but it is not a micropower part for always-on sensor nodes. Input offset voltage is 2 mV maximum at 5 V, which is adequate for threshold detection and zero-crossing circuits but not for precision window comparators where you would reach for an op-amp.

The 14-SOIC (0.154" body width, 3.90 mm) is a standard surface-mount footprint shared across many comparator and op-amp quads. The supplier device package is also 14-SOIC. The part is offered in Tape & Reel and Cut Tape options, which suits both prototype assembly and production pick-and-place. No special thermal management is needed at the 2.5 mA quiescent level.

It is ROHS3 compliant. For BOM planning, this part is a safe choice for long-life automotive programs.

Frequently asked questions

Does LM2901AVQDRG4Q1 meet AEC-Q100 automotive qualification?

Yes, the series is explicitly listed as Automotive, AEC-Q100. The part is qualified for automotive-grade applications including under-hood and engine-bay environments.

Is LM2901AVQDRG4Q1 a drop-in replacement for LM2901VQDRG4Q1?

The base product number is LM2901, and the package and pinout are identical across the LM2901 family in the 14-SOIC footprint. The 'AV' variant carries the full -40°C to 125°C temperature range and AEC-Q100 qualification; verify the 'V' variant's temperature grade against your BOM requirement before substituting.

What is the difference between LM2901 and LM339?

Both are quad comparators with open-collector outputs in similar pinouts. The LM2901 series is specified over the -40°C to 125°C automotive temperature range, while the LM339 is typically rated for 0°C to 70°C or -40°C to 85°C commercial/industrial grades. The LM2901 also has a wider supply range (2 V to 36 V) and tighter input offset voltage specifications in some variants. For automotive BOMs, the LM2901AVQDRG4Q1 is the correct choice.

LM2901AVQDRG4Q1
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