MAX243CWE RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The MAX243CWE is a 2/2 full-duplex RS232 transceiver manufactured by Analog Devices Inc./Maxim Integrated, housed in a 16-SOIC surface mount package. This interface IC is designed for serial communication applications requiring RS232 protocol compliance. The part is currently classified as obsolete, making equivalent substitutes necessary for ongoing design support and procurement. Substitute parts must maintain identical electrical characteristics and mechanical compatibility to ensure direct replacement capability.

Substiute Parts

MAX243CWE

Analog Devices Inc./Maxim IntegratedIn Stock: 845MAX243CWE Datasheet

Current PartRFQ

MAX232ACWE+

Analog Devices Inc./Maxim IntegratedIn Stock: 1360MAX232ACWE+ Datasheet

Parametric EquivalentRFQ

MAX202CDW

Texas InstrumentsIn Stock: 76428MAX202CDW Datasheet

MFR RecommendedRFQ

MAX202IDW

Texas InstrumentsIn Stock: 3944MAX202IDW Datasheet

MFR RecommendedRFQ

MAX202IDWR

Texas InstrumentsIn Stock: 4860MAX202IDWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MAX243CWE is determined by the following critical parameters:

• Protocol & Channel Configuration: RS232 protocol with 2/2 driver/receiver configuration and full-duplex operation
• Electrical Performance: 500 mV receiver hysteresis, 200 kbps data rate capability, 4.5V ~ 5.5V supply voltage range
• Mechanical Compatibility: 16-SOIC surface mount package with 0.295" (7.50mm) width
• Environmental Specifications: Operating temperature range and MSL rating

The substitute parts identified maintain these core parameters, ensuring functional and mechanical interchangeability. Variations in product status, RoHS compliance, and data rate specifications are noted where they occur.

Parameter Comparison

Engineering Selection Recommendations

MAX232ACWE+ (Analog Devices Inc./Maxim Integrated)

This part is the primary substitute for the MAX243CWE. It maintains identical electrical specifications including 200 kbps data rate and 0°C ~ 70°C operating temperature range. The MAX232ACWE+ is currently in active production status and carries ROHS3 compliance, making it suitable for new designs and ongoing procurement. Packaging is supplied in tube format.

MAX202IDWR (Texas Instruments)

This part is recommended as an alternative substitute with active product status. It maintains all critical electrical parameters including 500 mV receiver hysteresis and 4.5V ~ 5.5V supply voltage. The MAX202IDWR features an extended operating temperature range of -40°C ~ 85°C, providing broader environmental capability than the original MAX243CWE. ROHS3 compliance is confirmed. Packaging is supplied in Cut Tape (CT) & Digi-Reel® format.

MAX202CDW (Texas Instruments)

This part carries Last Time Buy status and is suitable for replacement applications where extended procurement windows are available. It maintains core electrical compatibility with 500 mV receiver hysteresis and identical supply voltage specifications. ROHS3 compliance is confirmed. Packaging is supplied in tube format.

MAX202IDW (Texas Instruments)

This part is classified as obsolete and carries a narrower operating temperature range (0°C ~ 70°C) matching the original MAX243CWE. While electrically compatible, its obsolete status limits its suitability for long-term applications.

Frequently Asked Questions (FAQ)

Q: Can MAX232ACWE+ directly replace MAX243CWE in existing designs?

A: Yes. The MAX232ACWE+ maintains identical electrical specifications including 200 kbps data rate, 500 mV receiver hysteresis, 4.5V ~ 5.5V supply voltage, and 0°C ~ 70°C operating temperature range. The 16-SOIC package dimensions are identical, enabling direct pin-compatible substitution.

Q: What is the primary difference between MAX243CWE and MAX202IDWR?

A: The MAX202IDWR extends the operating temperature range to -40°C ~ 85°C compared to the MAX243CWE's 0°C ~ 70°C specification. Data rate is reduced from 200 kbps to 120 kbps. All other electrical parameters remain compatible. The MAX202IDWR is currently in active production status.

Q: Why do some substitutes have lower data rates (120 kbps vs. 200 kbps)?

A: The MAX202 series variants operate at 120 kbps maximum data rate, which is lower than the MAX243CWE's 200 kbps specification. For applications requiring the full 200 kbps data rate, the MAX232ACWE+ is the appropriate choice.

Q: Are all substitute parts RoHS compliant?

A: The MAX232ACWE+, MAX202CDW, MAX202IDW, and MAX202IDWR are all ROHS3 compliant. The original MAX243CWE is RoHS non-compliant. Compliance requirements should be verified against your design standards.

Q: What packaging formats are available for these substitutes?

A: MAX232ACWE+ is supplied in tube packaging. MAX202CDW is supplied in tube packaging. MAX202IDW is supplied in tube packaging. MAX202IDWR is supplied in Cut Tape (CT) & Digi-Reel® format. All parts use the identical 16-SOIC surface mount package.

Q: Which substitute has the longest product lifecycle?

A: MAX232ACWE+ and MAX202IDWR both carry active product status, indicating ongoing manufacturer support and availability. These are recommended for new designs requiring long-term component availability.