MAX251EPD RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The MAX251EPD is a 2/2 full-duplex RS232 transceiver manufactured by Analog Devices Inc./Maxim Integrated, housed in a 14-pin DIP package. This interface IC is designed for serial communication applications requiring RS232 protocol compliance. The MAX251EPD is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support, maintenance, and new design implementations where legacy compatibility is required.

Substiute Parts

MAX251EPD

Analog Devices Inc./Maxim IntegratedIn Stock: 5131MAX251EPD Datasheet

Current PartRFQ

MAX251EPD+

Analog Devices Inc./Maxim IntegratedIn Stock: 1806MAX251EPD+ Datasheet

DirectRFQ

MAX250EPD+

Analog Devices Inc./Maxim IntegratedIn Stock: 1951MAX250EPD+ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the MAX251EPD is determined by strict equivalence across the following critical parameters:

• Protocol: RS232
• Drivers/Receivers Configuration: 2/2
• Duplex Mode: Full
• Receiver Hysteresis: 600 mV
• Supply Voltage Range: 4.5V ~ 5.5V
• Operating Temperature Range: -40°C ~ 85°C
• Package Type: 14-DIP (0.300", 7.62mm)
• Mounting Type: Through Hole

Substitute parts must maintain identical electrical specifications and mechanical compatibility to ensure direct replacement capability in existing circuit designs. The substitutes identified below meet all these criteria while offering improved product status and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The MAX251EPD is classified as obsolete, necessitating transition to active alternatives for new designs and ongoing production support.

MAX251EPD+ is the direct successor to the MAX251EPD, maintaining identical electrical and mechanical specifications while offering active product status and ROHS3 compliance. This part is the primary recommendation for direct replacement applications.

MAX250EPD+ is a parametric equivalent offering identical functional specifications, electrical performance, and package compatibility. This part is suitable where MAX251EPD+ availability is constrained, provided the MAX250 base product number is acceptable for system documentation and traceability requirements.

Both substitute parts are ROHS3 compliant and carry active product status, ensuring long-term availability and supply chain stability compared to the obsolete MAX251EPD.

Frequently Asked Questions (FAQ)

Q: Can MAX251EPD+ be used as a direct replacement for MAX251EPD? A: Yes. MAX251EPD+ maintains identical electrical specifications, receiver hysteresis, supply voltage range, operating temperature range, and 14-DIP package configuration. The parts are mechanically and electrically interchangeable.

Q: What is the difference between MAX251EPD+ and MAX250EPD+? A: Both parts are parametric equivalents with identical RS232 transceiver specifications, 2/2 driver/receiver configuration, full-duplex operation, and 14-DIP packaging. The primary difference is the base product number (MAX251 versus MAX250). Both are suitable substitutes where electrical and mechanical compatibility is the selection criterion.

Q: Why is RoHS compliance important for this substitution? A: The MAX251EPD is RoHS non-compliant, while both substitute parts are ROHS3 compliant. For applications subject to RoHS regulations or customer requirements, the compliant substitutes are necessary. For legacy systems without RoHS mandates, compliance status does not affect functional compatibility.

Q: Are the packaging specifications identical across all three parts? A: Yes. All three parts use 14-DIP (0.300", 7.62mm) through-hole packaging, ensuring identical PCB footprint and mounting compatibility.

Q: What is the product status significance? A: The MAX251EPD is obsolete, meaning Analog Devices has discontinued production and support. MAX251EPD+ and MAX250EPD+ are active products with ongoing manufacturing and supply chain support, making them suitable for new designs and long-term system maintenance.