MAX250CSD RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The MAX250CSD 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, with 4109 units currently in stock. Due to its obsolete status, identifying equivalent and substitute parts is essential for ongoing system support, design updates, and long-term component availability planning.

Substiute Parts

MAX250CSD

Analog Devices Inc./Maxim IntegratedIn Stock: 4129MAX250CSD Datasheet

Current PartRFQ

MAX250CSD+

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

DirectRFQ

MAX251CSD+

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

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MAX250CSD are identified based on strict electrical and mechanical parameter matching:

Critical Parameters for Substitution:

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

All substitute parts listed maintain identical electrical specifications and mechanical compatibility with the original MAX250CSD, ensuring direct functional equivalence in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

MAX250CSD+ (Direct Upgrade): This part is the direct successor to the MAX250CSD, maintaining identical electrical and mechanical specifications while offering active product status and ROHS3 compliance. Selection of MAX250CSD+ is appropriate for applications requiring regulatory compliance and long-term component availability.

MAX251CSD+ (Parametric Equivalent): This part provides equivalent electrical performance and mechanical compatibility with the MAX250CSD. The MAX251CSD+ is based on the MAX251 base product number and is available in active status with ROHS3 compliance. This option is suitable for applications where the specific base product variant does not impact system functionality.

Both substitute parts are manufactured by the same supplier, ensuring consistent quality and reliability standards. The transition from the obsolete MAX250CSD to either active substitute part is supported by matching electrical specifications and identical package geometry.

Frequently Asked Questions (FAQ)

Q: Can MAX250CSD+ be used as a direct replacement for MAX250CSD? A: Yes. MAX250CSD+ maintains identical electrical specifications (RS232 protocol, 2/2 drivers/receivers, full duplex, 600 mV receiver hysteresis, 4.5V–5.5V supply voltage, 0°C–70°C operating temperature) and mechanical compatibility (14-SOIC package, surface mount). The primary difference is product status (active vs. obsolete) and RoHS compliance.

Q: What is the difference between MAX250CSD+ and MAX251CSD+? A: Both parts are parametric equivalents with identical electrical specifications and package geometry. The difference lies in the base product number (MAX250 vs. MAX251). Both are active products with ROHS3 compliance. Selection between them depends on design requirements and availability considerations.

Q: Are there any package or mounting differences between these parts? A: No. All three parts use the 14-SOIC (0.154", 3.90mm Width) surface mount package. PCB layout and assembly processes remain unchanged.

Q: Why is the MAX250CSD marked as obsolete? A: The MAX250CSD has reached end-of-life status. Active alternatives (MAX250CSD+ and MAX251CSD+) are available to support ongoing applications and new designs.

Q: Do the substitute parts meet RoHS requirements? A: Yes. Both MAX250CSD+ and MAX251CSD+ are ROHS3 compliant. The original MAX250CSD is RoHS non-compliant.

Q: Is there any difference in supply voltage or operating temperature range? A: No. All three parts operate at 4.5V–5.5V supply voltage and 0°C–70°C operating temperature range.