MAX903CSA Equivalent & Substitute Parts

Part Overview

The MAX903CSA is a single-channel comparator with integrated latch functionality, packaged in 8-SOIC surface mount configuration. Manufactured by Analog Devices Inc./Maxim Integrated, this device provides TTL-compatible output suitable for precision voltage comparison applications requiring latching capability. The MAX903CSA is classified as obsolete product status, making identification of functionally equivalent active alternatives essential for new designs and ongoing production support.

Substiute Parts

MAX903CSA

Analog Devices Inc./Maxim IntegratedIn Stock: 2429MAX903CSA Datasheet

Current PartRFQ

MAX903CSA+

Analog Devices Inc./Maxim IntegratedIn Stock: 3037MAX903CSA+ Datasheet

DirectRFQ

LM211DR2G

onsemiIn Stock: 16142LM211DR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MAX903CSA is determined by the following critical parameters:

Primary Substitution Criteria:

• Comparator configuration: Single channel with latch functionality
• Output logic family: TTL compatibility
• Package form factor: 8-SOIC surface mount
• Supply voltage compatibility: Overlap within 5V ~ 10V single supply or ±2.5V ~ 5V dual supply range
• Input offset voltage performance: Maximum 4mV specification
• Input bias current: Maximum 10µA specification

Substitute Parts Identified:

1. MAX903CSA+ (Direct Manufacturer Upgrade) — Active product status replacement with identical electrical specifications and 8-SOIC packaging. Differs only in packaging format (Tube vs. unspecified) and RoHS3 compliance status.

2. LM211DR2G (Functional Alternative) — General-purpose comparator with TTL output capability, 8-SOIC package, and active product status. Meets core substitution parameters with extended supply voltage range (5V ~ 30V single, ±2.5V ~ 15V dual) and wider operating temperature range (-25°C ~ 85°C). Input offset voltage (3mV @ ±15V) and input bias current (0.1µA @ ±15V) exceed MAX903CSA performance specifications.

Parameter Comparison

Engineering Selection Recommendations

MAX903CSA+ (Recommended Primary Substitute)

The MAX903CSA+ is the direct active-product replacement for the obsolete MAX903CSA. Electrical specifications are identical across all measured parameters. Both devices maintain the same supply voltage range, input offset voltage, input bias current, and quiescent current characteristics. The MAX903CSA+ achieves ROHS3 compliance, addressing regulatory requirements for new production. Packaging format differs (Tube vs. unspecified), but the 8-SOIC surface mount footprint remains unchanged. This substitute requires no circuit redesign and provides direct pin-for-pin compatibility.

LM211DR2G (Extended-Range Alternative)

The LM211DR2G functions as a general-purpose comparator with TTL output capability and active product status. This device accommodates wider supply voltage ranges (5V ~ 30V single supply, ±2.5V ~ 15V dual supply) and extended operating temperature range (-25°C ~ 85°C). Input offset voltage performance (3mV @ ±15V) and input bias current (0.1µA @ ±15V) exceed MAX903CSA specifications. The LM211DR2G is classified as general-purpose rather than latching comparator; applications requiring integrated latch functionality must implement external latching circuitry. ROHS3 compliance and Tape & Reel packaging support high-volume production environments. This substitute is suitable for designs where extended operating conditions and improved input characteristics provide system benefits.

Frequently Asked Questions (FAQ)

Q: Can MAX903CSA+ be used as a direct replacement for MAX903CSA?

A: Yes. The MAX903CSA+ provides identical electrical specifications, TTL output type, single-channel latching comparator configuration, and 8-SOIC surface mount packaging. Pin-for-pin compatibility is maintained. The primary difference is product status (Active vs. Obsolete) and RoHS3 compliance certification.

Q: What is the key functional difference between MAX903CSA and LM211DR2G?

A: The MAX903CSA integrates latch functionality within the comparator IC. The LM211DR2G is a general-purpose comparator without integrated latch. Applications requiring latching behavior must implement external latch circuitry when using LM211DR2G. Both devices provide TTL output and 8-SOIC packaging.

Q: Are supply voltage ranges compatible between MAX903CSA and LM211DR2G?

A: The MAX903CSA operates within 5V ~ 10V (single supply) or ±2.5V ~ 5V (dual supply). The LM211DR2G accommodates 5V ~ 30V (single supply) or ±2.5V ~ 15V (dual supply). The LM211DR2G supply range encompasses the MAX903CSA range, providing compatibility for standard 5V and ±5V applications. Extended voltage capability of LM211DR2G does not affect operation within MAX903CSA voltage specifications.

Q: Does the 8-SOIC package remain identical across all three parts?

A: Yes. MAX903CSA, MAX903CSA+, and LM211DR2G all use 8-SOIC (0.154", 3.90mm Width) surface mount packaging. PCB footprint and land pattern are identical. Packaging format (Tube, Tape & Reel) differs for supply chain purposes but does not affect component form factor or mounting compatibility.

Q: What is the significance of RoHS3 compliance for MAX903CSA+?

A: MAX903CSA+ achieves ROHS3 compliance, meeting regulatory requirements for products sold in regions with RoHS directives. The original MAX903CSA is RoHS non-compliant. For new designs and production environments subject to RoHS regulations, MAX903CSA+ is the required substitute.

Q: Can LM211DR2G replace MAX903CSA in all applications?

A: LM211DR2G provides TTL output, 8-SOIC packaging, and active product status. However, the absence of integrated latch functionality requires external implementation for applications dependent on latching behavior. Input offset voltage and bias current specifications of LM211DR2G exceed MAX903CSA performance. Substitution is valid only for applications where latching functionality is not required or can be externally implemented.