MAX251CSD RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The MAX251CSD is a 2/2 full-duplex RS232 transceiver manufactured by Analog Devices Inc./Maxim Integrated, housed in a 14-SOIC surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations. The MAX251CSD provides bidirectional RS232 communication with integrated driver and receiver functionality suitable for serial data interface applications.

Substiute Parts

MAX251CSD

Analog Devices Inc./Maxim IntegratedIn Stock: 3821MAX251CSD Datasheet

Current PartRFQ

MAX251CSD+

Analog Devices Inc./Maxim IntegratedIn Stock: 2121MAX251CSD+ Datasheet

DirectRFQ

MAX250CSD+

Analog Devices Inc./Maxim IntegratedIn Stock: 2427MAX250CSD+ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MAX251CSD are determined by strict equivalence across the following critical parameters:

• Protocol: RS232
• Number of Drivers/Receivers: 2/2
• Duplex Mode: Full
• Receiver Hysteresis: 600 mV
• Supply Voltage Range: 4.5V ~ 5.5V
• Operating Temperature Range: 0°C ~ 70°C
• Package Type: 14-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount

All identified substitutes maintain identical electrical and mechanical specifications across these parameters, ensuring direct functional compatibility in existing circuit designs.

Parameter Comparison

Engineering Selection Recommendations

The MAX251CSD is obsolete and no longer in active production. For new designs and ongoing system support, the MAX251CSD+ is the direct successor, maintaining identical electrical and mechanical specifications while offering active product status and ROHS3 compliance.

The MAX250CSD+ provides parametric equivalence across all critical functional parameters. Both active alternatives (MAX251CSD+ and MAX250CSD+) are ROHS3 compliant, addressing modern regulatory requirements that the original MAX251CSD does not meet.

Selection between MAX251CSD+ and MAX250CSD+ should be based on availability, lead time, and inventory requirements, as both parts are electrically and mechanically interchangeable within the specified operating conditions.

Frequently Asked Questions (FAQ)

Q: Can MAX251CSD+ directly replace MAX251CSD in existing designs?

A: Yes. The MAX251CSD+ maintains identical electrical specifications, pin configuration, and package dimensions. No circuit modifications are required for substitution.

Q: What is the difference between MAX251CSD+ and MAX250CSD+?

A: Both parts are parametrically equivalent across all specified electrical and mechanical parameters. The primary difference is the base product number (MAX251 versus MAX250). Both are active products with ROHS3 compliance and identical 14-SOIC packaging.

Q: Why is the original MAX251CSD obsolete?

A: The MAX251CSD has reached end-of-life status. Active alternatives with improved compliance certifications are available.

Q: Are there any package or pinout differences between these parts?

A: No. All three parts use identical 14-SOIC (0.154", 3.90mm Width) surface mount packaging with the same pin configuration.

Q: What compliance certifications apply to the substitute parts?

A: Both MAX251CSD+ and MAX250CSD+ are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: Can these parts operate at different supply voltages?

A: All three parts operate within the same supply voltage range of 4.5V to 5.5V. No voltage adjustment is required when substituting.

Q: Are there temperature rating differences?

A: No. All parts maintain the same operating temperature range of 0°C to 70°C.