MAX243EWE+ RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The MAX243EWE+ is a full-duplex RS232 transceiver manufactured by Analog Devices Inc./Maxim Integrated, configured with 2 drivers and 2 receivers in a 16-SOIC surface mount package. This interface IC operates across the industrial temperature range of -40°C to 85°C and maintains active product status with 808 units currently in stock.

Substitute parts become necessary when addressing supply chain constraints, inventory availability, or specific packaging requirements while maintaining electrical and mechanical compatibility within the RS232 transceiver category.

Substiute Parts

MAX243EWE+

Analog Devices Inc./Maxim IntegratedIn Stock: 853MAX243EWE+ Datasheet

Current PartRFQ

MAX232AEWE+

Analog Devices Inc./Maxim IntegratedIn Stock: 2496MAX232AEWE+ Datasheet

Parametric EquivalentRFQ

MAX243EWE+

Analog Devices Inc./Maxim IntegratedIn Stock: 853MAX243EWE+ 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 MAX243EWE+ is determined by strict alignment across the following critical parameters:

Primary Substitution Criteria:

• Protocol: RS232
• Number of Drivers/Receivers: 2/2 configuration
• Duplex Mode: Full
• Package / Case: 16-SOIC (0.295", 7.50mm Width)
• Mounting Type: Surface Mount
• Receiver Hysteresis: 500 mV
• Voltage - Supply: 4.5V ~ 5.5V
• RoHS Status: ROHS3 Compliant

Secondary Compatibility Factors:

• Operating Temperature Range (must encompass or match the application requirement)
• Data Rate (minimum 120kbps acceptable for RS232 applications)
• Product Status (Active or Last Time Buy acceptable; Obsolete requires design review)

The substitute parts listed maintain identical electrical interface specifications and mechanical package dimensions, ensuring direct functional replacement in RS232 serial communication circuits.

Parameter Comparison

Engineering Selection Recommendations

MAX232AEWE+ (Parametric Equivalent): Identical electrical and mechanical specifications to the MAX243EWE+. Both manufactured by Analog Devices with Active product status. Selection between these two parts depends on packaging format availability (Tube vs. standard packaging) and inventory requirements. Both support the full industrial temperature range and 200kbps data rate.

MAX202CDW (MFR Recommended - Last Time Buy): Functionally compatible across all critical RS232 interface parameters. Manufactured by Texas Instruments with Last Time Buy status. Operating temperature range limited to 0°C ~ 70°C; suitable only for applications not requiring the full -40°C to 85°C industrial range. Data rate specification of 120kbps meets RS232 standard requirements. High inventory availability (76,380 units) supports immediate procurement.

MAX202IDW (MFR Recommended - Obsolete): Electrically and mechanically compatible with identical operating temperature range (-40°C ~ 85°C). Marked as Obsolete; use only when MAX202IDWR or other Active alternatives are unavailable. Supports full industrial temperature specifications.

MAX202IDWR (MFR Recommended - Active): Active product status with full industrial temperature range (-40°C ~ 85°C). Supplied in Cut Tape and Digi-Reel packaging format. Meets all electrical interface requirements with 120kbps data rate specification. Recommended for new designs requiring long-term supply assurance.

Frequently Asked Questions (FAQ)

Q: Can MAX202CDW replace MAX243EWE+ in all applications?

A: MAX202CDW is electrically compatible but has a restricted operating temperature range (0°C ~ 70°C). It is suitable only for applications operating within this narrower range. For designs requiring -40°C to 85°C operation, use MAX202IDW, MAX202IDWR, or MAX232AEWE+ instead.

Q: What is the difference between MAX202IDWR and MAX202IDW?

A: Both parts are electrically identical with the same operating temperature range (-40°C ~ 85°C). MAX202IDW is marked Obsolete, while MAX202IDWR maintains Active product status. MAX202IDWR is supplied in Cut Tape and Digi-Reel packaging. For new designs, MAX202IDWR is the preferred selection.

Q: Are all substitute parts in the same 16-SOIC package?

A: Yes. All listed substitute parts use the 16-SOIC (0.295", 7.50mm Width) surface mount package, ensuring mechanical compatibility and identical PCB footprint requirements.

Q: Do all substitutes support 200kbps data rate?

A: MAX232AEWE+ supports 200kbps. MAX202 variants (MAX202CDW, MAX202IDW, MAX202IDWR) specify 120kbps data rate. Both rates comply with RS232 serial communication standards. Selection depends on application bandwidth requirements.

Q: Which substitute has the best inventory availability?

A: MAX202CDW has the highest inventory (76,380 units). For Active product status with strong availability, MAX232AEWE+ (2,400 units) and MAX202IDWR (4,767 units) are preferred alternatives.

Q: Are all parts RoHS3 compliant?

A: Yes. All listed parts maintain ROHS3 Compliant status and REACH Unaffected classification, meeting environmental regulatory requirements.