MAX3291CSD RS422/RS485 Transceiver Equivalent & Substitute Parts

Part Overview

The MAX3291CSD is a full-duplex RS422/RS485 transceiver interface IC manufactured by Analog Devices Inc./Maxim Integrated. This component integrates one driver and one receiver in a 14-SOIC surface mount package, designed for industrial communication applications requiring robust serial data transmission.

The MAX3291CSD is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support long-term product maintenance and production requirements.

Substiute Parts

MAX3291CSD

Analog Devices Inc./Maxim IntegratedIn Stock: 2038MAX3291CSD Datasheet

Current PartRFQ

MAX3291CSD+

Analog Devices Inc./Maxim IntegratedIn Stock: 1190MAX3291CSD+ Datasheet

Parametric EquivalentRFQ

MAX3292CSD+

Analog Devices Inc./Maxim IntegratedIn Stock: 2179MAX3292CSD+ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MAX3291CSD are determined by strict equivalence across the following critical parameters:

• Protocol support: RS422 and RS485
• Driver/Receiver configuration: 1/1 (one driver, one receiver)
• Duplex mode: Full-duplex operation
• Receiver hysteresis: 35 mV
• Data rate: 10 Mbps
• Supply voltage range: 4.75V ~ 5.25V
• Operating temperature range: 0°C ~ 70°C
• Package type: 14-SOIC with identical physical dimensions
• Mounting type: Surface Mount

The identified substitutes maintain identical electrical and mechanical specifications, ensuring direct functional replacement in existing designs without circuit modification.

Parameter Comparison

Engineering Selection Recommendations

Both MAX3291CSD+ and MAX3292CSD+ are active product alternatives to the obsolete MAX3291CSD. Selection between these substitutes is based on product status and regulatory compliance:

MAX3291CSD+ is the direct parametric equivalent with identical base product designation. This part maintains active production status and achieves ROHS3 compliance, addressing regulatory requirements while preserving all electrical and mechanical specifications.

MAX3292CSD+ provides an alternative from the same manufacturer family with identical functional parameters and ROHS3 compliance. This part also maintains active production status and offers equivalent performance characteristics.

Both substitutes are suitable for new designs and production continuity. The choice between MAX3291CSD+ and MAX3292CSD+ depends on design requirements, supply chain considerations, and inventory availability, as both meet the specified electrical and mechanical criteria for direct substitution.

Frequently Asked Questions (FAQ)

Q: Can MAX3291CSD+ directly replace MAX3291CSD in existing designs?

A: Yes. MAX3291CSD+ maintains identical electrical specifications, receiver hysteresis, data rate, supply voltage range, operating temperature range, and 14-SOIC package dimensions. No circuit modifications are required for direct substitution.

Q: What is the difference between MAX3291CSD+ and MAX3292CSD+?

A: Both parts are parametric equivalents with identical RS422/RS485 transceiver functionality, 1/1 driver/receiver configuration, full-duplex operation, 10 Mbps data rate, and 14-SOIC packaging. The primary difference is the base product number designation (MAX3291 versus MAX3292). Both are active products with ROHS3 compliance.

Q: Why is the original MAX3291CSD obsolete?

A: The MAX3291CSD is classified as obsolete by the manufacturer. The active alternatives MAX3291CSD+ and MAX3292CSD+ provide continued access to equivalent functionality with modern compliance certifications.

Q: Are there any packaging differences between these parts?

A: The MAX3291CSD is supplied in standard packaging, while MAX3291CSD+ and MAX3292CSD+ are supplied in Tube packaging. All three parts use the identical 14-SOIC (0.154", 3.90mm Width) case. Tube packaging does not affect electrical performance or PCB assembly compatibility.

Q: Do the substitute parts meet current regulatory requirements?

A: Yes. Both MAX3291CSD+ and MAX3292CSD+ are ROHS3 compliant, addressing current regulatory requirements. The original MAX3291CSD is RoHS non-compliant. All three parts are REACH Unaffected and classified as EAR99 for export control purposes.

Q: What is the inventory status of these parts?

A: MAX3291CSD: 1972 Pcs New Original In Stock. MAX3291CSD+: 1145 Pcs New Original In Stock. MAX3292CSD+: 2100 Pcs New Original In Stock.