LM211QDRG4HT Equivalent & Substitute Parts

Part Overview

The LM211QDRG4HT is a differential comparator with open-collector and open-emitter outputs, manufactured by Texas Instruments in an 8-SOIC surface mount package. This device operates across a wide supply voltage range of 3.5V to 30V (single supply) or ±1.75V to ±15V (dual supply), making it suitable for precision voltage comparison applications in industrial and consumer electronics.

The LM211QDRG4HT is designated as Last Time Buy, indicating that Texas Instruments has discontinued this specific part number. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications currently using this component.

Substiute Parts

LM211QDRG4HT

Texas InstrumentsIn Stock: 1161LM211QDRG4HT Datasheet

Current PartRFQ

LM211QDRQ1

Texas InstrumentsIn Stock: 20181LM211QDRQ1 Datasheet

MFR RecommendedRFQ

LM211QDRRB

Texas InstrumentsIn Stock: 946LM211QDRRB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM211QDRG4HT are identified based on strict electrical and mechanical compatibility criteria. The following parameters determine substitution eligibility:

Critical Matching Parameters:

• Package type: 8-SOIC surface mount form factor
• Output configuration: Open-Collector, Open-Emitter topology
• Supply voltage range: 3.5V ~ 30V (single) or ±1.75V ~ ±15V (dual)
• Input offset voltage: 3mV @ ±15V maximum
• Input bias current: 0.1µA @ ±15V maximum
• Quiescent current: 5mA to 6mA maximum
• Operating temperature range: Minimum -40°C to 85°C

Substitute parts are grouped into two categories:

1. MFR Recommended Substitute (LM211QDRQ1): Manufacturer-designated replacement with extended operating temperature range and automotive qualification.

2. Parametric Equivalent (LM211QDRRB): Direct electrical parameter match with identical differential comparator specifications and performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

LM211QDRQ1 (MFR Recommended Substitute):

The LM211QDRQ1 is the manufacturer-designated replacement for the LM211QDRG4HT. This part maintains identical electrical specifications across all critical parameters: supply voltage range, input offset voltage, input bias current, and quiescent current. The LM211QDRQ1 extends the operating temperature range to -40°C ~ 125°C, providing enhanced thermal performance for applications requiring higher temperature operation.

The LM211QDRQ1 carries AEC-Q100 automotive qualification and is designated as Active product status, ensuring long-term availability and supply chain stability. This part is recommended for new designs and as the primary replacement for discontinued LM211QDRG4HT applications.

LM211QDRRB (Parametric Equivalent):

The LM211QDRRB provides direct electrical parameter equivalence to the LM211QDRG4HT with identical differential comparator specifications. This part maintains the same operating temperature range (-40°C ~ 85°C) and quiescent current characteristics. The LM211QDRRB is designated as Active product status.

The LM211QDRRB has Moisture Sensitivity Level 3 (168 Hours), compared to MSL 1 (Unlimited) for the main part. This difference requires consideration in storage and handling procedures but does not affect electrical performance or functional compatibility.

Frequently Asked Questions (FAQ)

Q: Can LM211QDRQ1 be used as a direct replacement for LM211QDRG4HT?

A: Yes. The LM211QDRQ1 maintains all critical electrical parameters: supply voltage range (3.5V ~ 30V, ±1.75V ~ 15V), input offset voltage (3mV @ ±15V), input bias current (0.1µA @ ±15V), and quiescent current (6mA). The identical 8-SOIC package and open-collector/open-emitter output configuration enable direct PCB substitution. The extended operating temperature range (-40°C ~ 125°C) provides additional thermal margin.

Q: What is the difference between LM211QDRQ1 and LM211QDRRB?

A: Both parts are electrically equivalent to the LM211QDRG4HT. The LM211QDRQ1 is the manufacturer-recommended replacement with extended temperature range (-40°C ~ 125°C) and automotive qualification (AEC-Q100). The LM211QDRRB maintains the original operating temperature range (-40°C ~ 85°C) and is a parametric equivalent. The LM211QDRRB has MSL 3 (168 Hours) versus MSL 1 (Unlimited) for LM211QDRQ1, affecting storage and handling requirements.

Q: Are all substitute parts in the same 8-SOIC package?

A: Yes. The LM211QDRG4HT, LM211QDRQ1, and LM211QDRRB are all packaged in 8-SOIC (0.154", 3.90mm Width) surface mount form factor. No PCB layout modifications are required for substitution.

Q: What does "Last Time Buy" status mean for the LM211QDRG4HT?

A: Last Time Buy indicates that Texas Instruments has discontinued this specific part number and will not manufacture additional units beyond a final order window. Existing inventory may be available, but long-term supply cannot be guaranteed. Substitution to an Active product status part (LM211QDRQ1 or LM211QDRRB) is recommended for design continuity.

Q: Do the substitute parts meet RoHS compliance?

A: Yes. Both LM211QDRQ1 and LM211QDRRB are ROHS3 Compliant, matching the compliance status of the original LM211QDRG4HT.

Q: What is the significance of Moisture Sensitivity Level (MSL) differences?

A: MSL 1 (Unlimited) indicates no moisture sensitivity restrictions on storage and handling. MSL 3 (168 Hours) requires that the component be used within 168 hours of package opening under specified humidity conditions. The LM211QDRRB's MSL 3 rating requires adherence to moisture control procedures during storage and assembly, but does not affect electrical performance or functional compatibility.