MAX3243CDWRG4 Equivalent & Substitute Parts

Part Overview

The MAX3243CDWRG4 is a full-duplex RS232 transceiver with 3 drivers and 5 receivers, packaged in a 28-SOIC surface mount configuration. This interface IC operates across a 3V to 5.5V supply range and supports data rates up to 250 kbps. The part is currently discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing system support and new designs requiring RS232 serial communication functionality.

Key Parameters

Parameter	Value
Manufacturer Part Number	MAX3243CDWRG4
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	3/5
Duplex	Full
Data Rate	250 kbps
Voltage Supply Range	3V to 5.5V
Operating Temperature	0°C to 70°C
Package/Case	28-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the MAX3243CDWRG4 is determined by strict equivalence across the following critical parameters:

Protocol: RS232
Number of Drivers/Receivers: 3/5
Duplex Mode: Full
Package/Case: 28-SOIC
Voltage Supply Range: 3V to 5.5V
Mounting Type: Surface Mount
RoHS Compliance: ROHS3 Compliant

Substitute parts are grouped into two categories:

Direct Equivalents (Identical Specifications): Parts that match all key electrical and mechanical parameters of the original part, differing only in packaging format (Tape & Reel vs. Tube) or product status (Active vs. Discontinued).

Functional Equivalents (Parameter Variations): Parts that maintain core RS232 3/5 transceiver functionality within the same package but may differ in receiver hysteresis, data rate, operating temperature range, or moisture sensitivity level. These parts are electrically compatible but operate under different environmental or performance specifications.

Parameter Comparison

Part Number	Manufacturer	Drivers/Receivers	Data Rate	Receiver Hysteresis	Operating Temp	Packaging	Product Status
MAX3243CDWRG4	Texas Instruments	3/5	250 kbps	300 mV	0°C to 70°C	Tube	Discontinued
MAX3243CDWR	Texas Instruments	3/5	250 kbps	300 mV	0°C to 70°C	Tape & Reel	Active
MAX3243EEWI+	Analog Devices Inc./Maxim Integrated	3/5	250 kbps	500 mV	-40°C to 85°C	Tube	Active
ICL3243CBZ	Renesas Electronics Corporation	3/5	250 kbps	300 mV	0°C to 70°C	Tube	Active
MAX3243CWI+	Analog Devices Inc./Maxim Integrated	3/5	120 kbps	300 mV	0°C to 70°C	Tube	Active
MAX3243ECWI+	Analog Devices Inc./Maxim Integrated	3/5	250 kbps	300 mV	0°C to 70°C	Tube	Active
MAX3243EWI+	Analog Devices Inc./Maxim Integrated	3/5	120 kbps	300 mV	-40°C to 85°C	Tube	Active
MAX3244ECWI+	Analog Devices Inc./Maxim Integrated	3/5	250 kbps	500 mV	0°C to 70°C	Tube	Active

Engineering Selection Recommendations

Primary Recommendation: MAX3243CDWR is the direct equivalent of MAX3243CDWRG4, differing only in packaging format (Tape & Reel vs. Tube). Both parts are Texas Instruments products with identical electrical specifications and ROHS3 compliance. This part is currently active in inventory.

Secondary Recommendation: MAX3243ECWI+ (Analog Devices Inc./Maxim Integrated) provides identical electrical performance to the original part with 250 kbps data rate, 300 mV receiver hysteresis, and 0°C to 70°C operating temperature. This part maintains ROHS3 compliance and is actively stocked.

Extended Temperature Range Option: MAX3243EEWI+ and MAX3243EWI+ both support -40°C to 85°C operating temperature, suitable for applications requiring extended environmental performance. MAX3243EEWI+ maintains the 250 kbps data rate, while MAX3243EWI+ operates at 120 kbps.

Alternative Manufacturer: ICL3243CBZ (Renesas Electronics Corporation) provides functional equivalence with identical electrical specifications to the original part. This part carries MSL-3 moisture sensitivity versus MSL-1 for the original, requiring appropriate handling during storage and assembly.

Lower Data Rate Alternatives: MAX3243CWI+ and MAX3243EWI+ operate at 120 kbps instead of 250 kbps. These parts are suitable for applications where reduced data rate is acceptable and may offer cost or availability advantages.

Frequently Asked Questions (FAQ)

Q: Can MAX3243CDWR be used as a direct replacement for MAX3243CDWRG4?

A: Yes. MAX3243CDWR is electrically and mechanically identical to MAX3243CDWRG4. The only difference is packaging format: MAX3243CDWR is supplied in Tape & Reel format while MAX3243CDWRG4 is supplied in Tube format. Both parts are ROHS3 compliant with identical electrical specifications.

Q: What is the difference between MAX3243ECWI+ and MAX3243EEWI+?

A: Both parts are Analog Devices Inc./Maxim Integrated products with 3/5 RS232 transceiver functionality in 28-SOIC packaging. MAX3243EEWI+ features 500 mV receiver hysteresis and -40°C to 85°C operating temperature. MAX3243ECWI+ features 300 mV receiver hysteresis and 0°C to 70°C operating temperature. Both support 250 kbps data rate.

Q: Is ICL3243CBZ compatible with MAX3243CDWRG4?

A: ICL3243CBZ is functionally compatible with MAX3243CDWRG4 for RS232 3/5 transceiver applications. Both parts share identical electrical specifications (250 kbps data rate, 300 mV receiver hysteresis, 3V to 5.5V supply, 0°C to 70°C operating temperature) and 28-SOIC packaging. The primary difference is moisture sensitivity level: ICL3243CBZ is MSL-3 (168 Hours) versus MSL-1 (Unlimited) for the original part.

Q: Can I use MAX3243CWI+ as a substitute if my application requires 250 kbps data rate?

A: No. MAX3243CWI+ operates at 120 kbps maximum data rate, which is insufficient for applications requiring 250 kbps. Use MAX3243ECWI+, MAX3243EEWI+, or MAX3244ECWI+ for 250 kbps operation.

Q: What is the advantage of MAX3244ECWI+ over MAX3243ECWI+?

A: MAX3244ECWI+ features 500 mV receiver hysteresis compared to 300 mV in MAX3243ECWI+. Both parts support 250 kbps data rate and 0°C to 70°C operating temperature in 28-SOIC packaging. Higher receiver hysteresis provides improved noise immunity in electrically noisy environments.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant, matching the compliance status of MAX3243CDWRG4.

Q: What packaging options are available for MAX3243 series parts?

A: Substitute parts are available in Tube and Tape & Reel packaging formats. MAX3243CDWR is supplied in Tape & Reel format for high-volume applications. All other listed substitutes are supplied in Tube format. Both packaging formats are compatible with standard PCB assembly processes.

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