SN2903DR Equivalent & Substitute Parts

Part Overview

The SN2903DR is a dual general-purpose comparator manufactured by Texas Instruments, designated as a Last Time Buy product. This device is classified as an uncategorized prototype component with ROHS3 compliance and MSL Level 1 rating. Due to its Last Time Buy status, identifying qualified substitute components is essential for design continuity and long-term supply chain planning. The SN2903DR operates as a voltage comparator suitable for general-purpose signal comparison applications requiring open-collector output configuration.

Substiute Parts

SN2903DR

Texas InstrumentsIn Stock: 1023SN2903DR Datasheet

Current PartRFQ

LM2903DR

UMWIn Stock: 105253LM2903DR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN2903DR is based on functional equivalence within the dual comparator category. The LM2903DR qualifies as a direct substitute based on the following critical parameters:

Substitution Criteria:

• Dual comparator architecture (2 elements)
• Open-collector, rail-to-rail output configuration
• Supply voltage range compatibility (2V ~ 30V, ±1V ~ ±15V)
• Input offset voltage specification (5mV maximum @ 5V)
• Input bias current specification (0.25µA maximum @ 5V)
• Output current capability (16mA typical @ 5V)
• Quiescent current specification (2.5mA maximum)
• Propagation delay specification (300ns typical)
• 8-SOIC package form factor
• ROHS3 compliance and MSL Level 1 rating

The LM2903DR, manufactured by UMW, maintains electrical and mechanical compatibility with the SN2903DR across all specified parameters, enabling direct substitution in applications requiring dual general-purpose comparator functionality.

Parameter Comparison

Engineering Selection Recommendations

The LM2903DR is qualified as a direct substitute for the SN2903DR based on complete electrical and mechanical parameter alignment. Both devices maintain ROHS3 compliance and MSL Level 1 certification, ensuring regulatory and environmental compatibility across applications.

Selection of the LM2903DR is supported by:

• Identical dual comparator functionality with matching electrical specifications
• Equivalent package form factor (8-SOIC surface mount)
• Matching supply voltage operating ranges and input/output characteristics
• Consistent compliance certifications (ROHS3, MSL Level 1)
• Active product status of the substitute component, ensuring continued availability

The LM2903DR is available in higher inventory quantities (105,200 pieces) compared to the SN2903DR (956 pieces), providing improved supply chain security for ongoing production requirements.

Frequently Asked Questions (FAQ)

Q: Can the LM2903DR be used as a direct replacement for the SN2903DR in existing designs?

A: Yes. The LM2903DR provides complete electrical and mechanical compatibility with the SN2903DR. All critical parameters including supply voltage range, input offset voltage, input bias current, output current, quiescent current, propagation delay, and package form factor are identical. No circuit modifications are required.

Q: Are there any differences in package specifications between these components?

A: No. Both the SN2903DR and LM2903DR utilize the 8-SOIC package with identical dimensions (0.154" width, 3.90mm). Both are surface mount devices with identical pin configurations and mechanical compatibility.

Q: What is the significance of the SN2903DR being designated as Last Time Buy?

A: Last Time Buy status indicates that the SN2903DR will no longer be manufactured after a specified date. Identifying and qualifying substitute components such as the LM2903DR is necessary to ensure design continuity and maintain production schedules beyond the Last Time Buy cutoff date.

Q: Do both components meet the same compliance and environmental standards?

A: Yes. Both the SN2903DR and LM2903DR are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity ratings. They meet identical regulatory and environmental requirements for industrial and commercial applications.

Q: What are the key electrical parameters that determine substitution compatibility?

A: Substitution compatibility is determined by matching: dual comparator architecture, open-collector rail-to-rail output configuration, supply voltage range (2V ~ 30V, ±1V ~ ±15V), input offset voltage (5mV @ 5V), input bias current (0.25µA @ 5V), output current (16mA @ 5V), quiescent current (2.5mA), and propagation delay (300ns typical).

Q: Is the LM2903DR suitable for applications requiring the same operating temperature range?

A: Yes. Both components operate across the identical temperature range of 0°C to 70°C, ensuring thermal compatibility in equivalent application environments.