LM211DRE4 Equivalent & Substitute Parts

Part Overview

The LM211DRE4 is a general-purpose comparator IC manufactured by Texas Instruments, housed in an 8-SOIC surface-mount package. This device is classified as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design support and procurement. The LM211DRE4 operates across a wide supply voltage range (4.6V to 30V single supply, ±1.75V to ±15V dual supply) and features open-collector, open-emitter output configurations suitable for DTL, MOS, RTL, and TTL logic interfacing.

Substiute Parts

LM211DRE4

Texas InstrumentsIn Stock: 946LM211DRE4 Datasheet

Current PartRFQ

LM211DR

Texas InstrumentsIn Stock: 105473LM211DR Datasheet

Parametric EquivalentRFQ

LM211DRG4

Texas InstrumentsIn Stock: 7178LM211DRG4 Datasheet

Parametric EquivalentRFQ

LM211DT

STMicroelectronicsIn Stock: 46505LM211DT Datasheet

DirectRFQ

LM211DR2G

onsemiIn Stock: 16142LM211DR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM211DRE4 is determined by strict equivalence across the following critical parameters:

Electrical Compatibility Criteria:

• Package type: 8-SOIC form factor (0.154", 3.90mm Width)
• Output configuration: DTL, MOS, Open-Collector, Open-Emitter, RTL, TTL compatibility
• Input offset voltage: 3mV @ ±15V maximum
• Input bias current: 0.1µA @ ±15V maximum
• Output current: 50mA typical
• Quiescent current: 6mA maximum
• Voltage supply range: Minimum 4.6V single supply or ±1.75V dual supply

Mechanical Compatibility:

• Surface-mount 8-SOIC package with identical pinout and footprint

Regulatory Compliance:

• ROHS3 compliance
• MSL Level 1 rating

Substitute parts are grouped into three categories based on manufacturer and product status: parametric equivalents from Texas Instruments (active and discontinued), direct manufacturer alternatives, and manufacturer-recommended substitutes from alternative suppliers.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: LM211DR (Texas Instruments)

The LM211DR is the preferred substitute for the obsolete LM211DRE4. Both parts are manufactured by Texas Instruments and maintain identical electrical specifications across all critical parameters. The LM211DR carries active product status with substantial inventory availability (105,400 units), ensuring long-term procurement viability. This part is supplied in Cut Tape and Digi-Reel packaging formats.

Secondary Recommendation: LM211DT (STMicroelectronics)

The LM211DT from STMicroelectronics is an active alternative with compatible electrical performance. This part exhibits a higher maximum operating temperature range (-40°C to 105°C versus -40°C to 85°C), providing thermal margin for applications requiring extended temperature operation. The minimum supply voltage specification differs slightly (5V single supply versus 4.6V), which may impact designs operating at lower supply voltages. Inventory availability is robust (46,488 units).

Tertiary Recommendation: LM211DR2G (onsemi)

The LM211DR2G from onsemi is a manufacturer-recommended substitute with active product status. This part maintains electrical equivalence with identical input offset voltage, input bias current, and quiescent current specifications. The operating temperature range is narrower (-25°C to 85°C), which may restrict use in applications requiring full -40°C operation. Inventory availability is adequate (16,117 units). This part is supplied in Tape & Reel packaging.

Discontinued Alternative: LM211DRG4 (Texas Instruments)

The LM211DRG4 is discontinued at DiGi Electronics but remains available in inventory (7,156 units). This part maintains full electrical equivalence with the LM211DRE4 and should be considered only when primary recommendations are unavailable.

Frequently Asked Questions (FAQ)

Q: Can the LM211DR be used as a direct replacement for the LM211DRE4?

A: Yes. The LM211DR is a direct parametric equivalent manufactured by the same supplier (Texas Instruments). Both parts share identical electrical specifications, package configuration, and pinout. The primary difference is product status: LM211DR is active while LM211DRE4 is obsolete.

Q: What are the key differences between the LM211DT and LM211DR?

A: The LM211DT (STMicroelectronics) and LM211DR (Texas Instruments) differ in three areas: manufacturer, operating temperature range (LM211DT extends to 105°C), and minimum supply voltage (LM211DT requires 5V minimum single supply versus 4.6V for LM211DR). Electrical performance characteristics remain equivalent. Design applications operating below 5V single supply must use the LM211DR or LM211DRE4.

Q: Is the LM211DR2G suitable for low-temperature applications?

A: The LM211DR2G operating temperature range is -25°C to 85°C, which does not extend to -40°C. Applications requiring operation at -40°C must use LM211DR, LM211DRE4, LM211DRG4, or LM211DT.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (LM211DR, LM211DRG4, LM211DT, LM211DR2G) carry ROHS3 compliance certification and MSL Level 1 rating, matching the original LM211DRE4 specifications.

Q: What packaging formats are available for each substitute?

A: LM211DR is available in Cut Tape (CT) and Digi-Reel formats. LM211DRG4 is available in Cut Tape and Digi-Reel formats. LM211DT is available in Cut Tape and Digi-Reel formats. LM211DR2G is supplied in Tape & Reel (TR) format.

Q: Can I use the LM211DT in a design originally specified for the LM211DRE4 operating at 4.6V supply?

A: No. The LM211DT minimum supply voltage is 5V single supply, while the LM211DRE4 operates from 4.6V. Designs requiring 4.6V operation must use LM211DR, LM211DRE4, or LM211DRG4.

Q: Which substitute offers the best long-term availability?

A: The LM211DR (Texas Instruments) offers the highest inventory level (105,400 units) and active product status, providing the strongest long-term procurement assurance.