MAX232EIPW RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The MAX232EIPW is a 2/2 full-duplex RS232 transceiver manufactured by Texas Instruments in a 16-TSSOP surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations. The MAX232EIPW operates within a 4.5V to 5.5V supply range with a 250kbps data rate and -40°C to 85°C operating temperature range. Substitute parts must maintain functional compatibility across RS232 protocol requirements, electrical specifications, and mechanical packaging constraints.

Key Parameters

Parameter	MAX232EIPW Specification
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	2/2
Duplex	Full
Receiver Hysteresis	500 mV
Data Rate	250kbps
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	16-TSSOP (0.173", 4.40mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the MAX232EIPW is determined by the following critical parameters:

Primary Compatibility Criteria:

Protocol: RS232
Number of Drivers/Receivers: 2/2
Duplex: Full
Mounting Type: Surface Mount
Package / Case: 16-TSSOP (0.173", 4.40mm Width)

Secondary Compatibility Criteria:

Voltage - Supply: Must support 4.5V minimum (5.5V maximum acceptable)
Data Rate: Must support minimum 250kbps
Operating Temperature: Must support -40°C to 85°C range or be suitable for the intended application temperature window
Receiver Hysteresis: 300 mV to 500 mV acceptable range

Substitute parts are grouped into two categories:

Category A - Direct Replacements (Same Base Product): MAX232 series parts with identical electrical and mechanical specifications. These include MAX232EIPWR, MAX232ACUE+, MAX232ACUE+T, and MAX232AEUE+.

Category B - Functional Equivalents (Enhanced Specifications): MAX3232 and SP3232 series parts that meet or exceed all critical parameters while offering improved performance characteristics such as lower supply voltage support (3V minimum) and enhanced receiver hysteresis (300 mV).

Parameter Comparison

Part Number	Manufacturer	Product Status	Data Rate	Voltage - Supply	Operating Temperature	Receiver Hysteresis	Packaging
MAX232EIPW	Texas Instruments	Obsolete	250kbps	4.5V ~ 5.5V	-40°C ~ 85°C	500 mV	Tube
MAX232EIPWR	Texas Instruments	Active	250kbps	4.5V ~ 5.5V	-40°C ~ 85°C	500 mV	Cut Tape (CT) & Digi-Reel®
MAX232ACUE+	Analog Devices Inc./Maxim Integrated	Active	200kbps	4.5V ~ 5.5V	0°C ~ 70°C	500 mV	Tube
MAX232ACUE+T	Analog Devices Inc./Maxim Integrated	Active	200kbps	4.5V ~ 5.5V	0°C ~ 70°C	500 mV	Tape & Reel (TR)
MAX232AEUE+	Analog Devices Inc./Maxim Integrated	Active	200kbps	4.5V ~ 5.5V	-40°C ~ 85°C	500 mV	Tube
MAX3232CUE+	Analog Devices Inc./Maxim Integrated	Active	235Kbps	3V ~ 5.5V	0°C ~ 70°C	300 mV	Tube
MAX3232CUE+T	Analog Devices Inc./Maxim Integrated	Active	235Kbps	3V ~ 5.5V	0°C ~ 70°C	300 mV	Cut Tape (CT) & Digi-Reel®
MAX3232EUE+	Analog Devices Inc./Maxim Integrated	Active	235Kbps	3V ~ 5.5V	-40°C ~ 85°C	300 mV	Tube
MAX3232EUE+T	Analog Devices Inc./Maxim Integrated	Active	235Kbps	3V ~ 5.5V	-40°C ~ 85°C	300 mV	Cut Tape (CT) & Digi-Reel®
SP3232EBCY-L/TR	MaxLinear, Inc.	Active	250kbps	3V ~ 5.5V	0°C ~ 70°C	300 mV	Cut Tape (CT) & Digi-Reel®
SP3232EBEY-L/TR	MaxLinear, Inc.	Active	250kbps	3V ~ 5.5V	-40°C ~ 85°C	300 mV	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

For Extended Temperature Range Applications (-40°C to 85°C):

Select MAX232EIPWR for direct replacement with active product status and identical electrical specifications. Alternatively, MAX232AEUE+ or MAX3232EUE+ provide active status with extended temperature support. SP3232EBEY-L/TR offers equivalent temperature range with enhanced supply voltage flexibility (3V minimum) and higher inventory availability.

For Standard Temperature Range Applications (0°C to 70°C):

MAX232ACUE+, MAX232ACUE+T, MAX3232CUE+, MAX3232CUE+T, and SP3232EBCY-L/TR are suitable. These parts maintain full RS232 2/2 transceiver functionality with active product status and ROHS3 compliance.

For Supply Voltage Flexibility (3V Operation):

MAX3232 and SP3232 series parts support 3V minimum supply voltage, enabling operation in lower-voltage systems while maintaining full compatibility with 5.5V maximum. These parts are recommended for applications requiring reduced power consumption or mixed-voltage environments.

For Packaging Considerations:

Tube packaging is available across all substitute options. Cut Tape (CT) & Digi-Reel® packaging is available for MAX232EIPWR, MAX3232CUE+T, MAX3232EUE+T, SP3232EBCY-L/TR, and SP3232EBEY-L/TR, supporting automated assembly processes.

All substitute parts maintain ROHS3 compliance, MSL 1 (Unlimited) moisture sensitivity rating, and EAR99 export classification consistent with the original MAX232EIPW.

Frequently Asked Questions (FAQ)

Q: Can MAX232ACUE+ replace MAX232EIPW in applications requiring -40°C to 85°C operation?

A: No. MAX232ACUE+ operates within 0°C to 70°C temperature range. For extended temperature applications, select MAX232AEUE+, MAX3232EUE+, MAX3232EUE+T, or SP3232EBEY-L/TR.

Q: What is the difference between MAX232 and MAX3232 series substitutes?

A: MAX3232 series supports 3V to 5.5V supply voltage compared to MAX232's 4.5V to 5.5V range. MAX3232 also features 300 mV receiver hysteresis versus MAX232's 500 mV. Both maintain 2/2 full-duplex RS232 transceiver functionality in 16-TSSOP packaging.

Q: Are SP3232 parts compatible with MAX232EIPW applications?

A: Yes. SP3232 parts maintain identical 2/2 full-duplex RS232 transceiver configuration, 16-TSSOP packaging, and support 250kbps data rate. SP3232EBEY-L/TR is recommended for -40°C to 85°C applications; SP3232EBCY-L/TR for 0°C to 70°C applications.

Q: Does packaging type affect electrical compatibility?

A: No. Tube, Cut Tape (CT) & Digi-Reel®, and Tape & Reel (TR) packaging options contain identical die and electrical specifications. Packaging selection depends on assembly process requirements and inventory management.

Q: Can I use MAX3232CUE+ in a system designed for MAX232EIPW?

A: Conditional compatibility. MAX3232CUE+ operates within 0°C to 70°C temperature range. If your application requires -40°C to 85°C operation, this part is not suitable. For standard temperature ranges, MAX3232CUE+ is compatible with identical 2/2 transceiver functionality and 16-TSSOP packaging.

Q: What inventory considerations apply to substitute selection?

A: MAX3232CUE+T and MAX3232EUE+T offer highest inventory availability (25,400 and 17,700 units respectively). SP3232EBEY-L/TR provides 30,194 units. For immediate availability with extended temperature range, SP3232EBEY-L/TR is recommended.

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