MAX251CPD RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The MAX251CPD 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 MAX251CPD is classified as obsolete, making equivalent and substitute parts necessary for new designs, maintenance, and production continuity. Active alternatives with identical electrical and mechanical specifications are available from the same manufacturer.

Substiute Parts

MAX251CPD

Analog Devices Inc./Maxim IntegratedIn Stock: 5035MAX251CPD Datasheet

Current PartRFQ

MAX251CPD+

Analog Devices Inc./Maxim IntegratedIn Stock: 3066MAX251CPD+ Datasheet

DirectRFQ

MAX250CPD+

Analog Devices Inc./Maxim IntegratedIn Stock: 944MAX250CPD+ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the MAX251CPD is determined by strict equivalence across the following critical parameters:

• Protocol: RS232
• Number of Drivers/Receivers: 2/2
• Duplex Mode: Full
• Receiver Hysteresis: 600 mV
• Voltage Supply Range: 4.5V ~ 5.5V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 14-DIP (0.300", 7.62mm)
• Mounting Type: Through Hole

Two substitute parts meet these criteria:

1. MAX251CPD+ — Direct manufacturer equivalent with identical electrical and mechanical specifications. Product status is active, ensuring ongoing availability and RoHS3 compliance.

2. MAX250CPD+ — Parametric equivalent with identical electrical and mechanical specifications. Shares the same base product family (MAX250 series) with active product status and RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

For new designs and production: MAX251CPD+ is the primary substitute. It is the direct manufacturer equivalent with active product status, ensuring long-term availability and supply chain stability. RoHS3 compliance aligns with current environmental and regulatory requirements.

For parametric equivalence: MAX250CPD+ provides an alternative with identical electrical and mechanical specifications. Active product status and RoHS3 compliance make it suitable for applications where the MAX251CPD+ is unavailable. Both substitutes are pin-compatible and functionally equivalent within the specified operating parameters.

Compliance consideration: The original MAX251CPD is RoHS non-compliant. Both substitute parts (MAX251CPD+ and MAX250CPD+) are RoHS3 compliant, meeting modern regulatory standards for new applications.

Frequently Asked Questions (FAQ)

Q: Can MAX251CPD+ be used as a direct replacement for MAX251CPD?

A: Yes. MAX251CPD+ is the direct manufacturer equivalent with identical electrical specifications (2/2 RS232 transceiver, 600 mV receiver hysteresis, 4.5V–5.5V supply, 0°C–70°C operating range) and mechanical specifications (14-DIP package, through-hole mounting). Pin configuration and functional behavior are identical.

Q: What is the difference between MAX251CPD+ and MAX250CPD+?

A: Both parts are parametric equivalents with identical electrical and mechanical specifications. The primary difference is the base product number (MAX251 vs. MAX250). Both are active products from Analog Devices Inc./Maxim Integrated with RoHS3 compliance. Selection between them depends on availability and supply chain considerations.

Q: Are the substitute parts pin-compatible with the original MAX251CPD?

A: Yes. Both MAX251CPD+ and MAX250CPD+ use the 14-DIP (0.300", 7.62mm) package with identical pinout. Through-hole mounting is identical, allowing direct PCB replacement without layout modifications.

Q: Does the RoHS3 compliance of the substitutes affect compatibility?

A: No. RoHS3 compliance is a manufacturing and environmental standard that does not affect electrical or mechanical compatibility. The substitutes are fully compatible with existing designs using the original MAX251CPD.

Q: Which substitute should be selected for new production?

A: MAX251CPD+ is recommended for new production as the direct manufacturer equivalent. It ensures consistency with the original part number while providing active product status and modern compliance certifications.