MAX3232CDBG4 Equivalent & Substitute Parts

Part Overview

The MAX3232CDBG4 is a 2/2 full-duplex RS232 transceiver manufactured by Texas Instruments, housed in a 16-SSOP package. This interface IC operates across a 3V to 5.5V supply range with a 250kbps data rate and 300mV receiver hysteresis. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	MAX3232CDBG4
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	2/2
Duplex	Full
Data Rate	250kbps
Voltage Supply Range	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package / Case	16-SSOP (0.209", 5.30mm Width)
Mounting Type	Surface Mount
Receiver Hysteresis	300mV
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the MAX3232CDBG4 is determined by the following critical parameters:

Protocol: RS232 full-duplex transceiver
Driver/Receiver Configuration: 2/2
Package Type: 16-SSOP or 16-TSSOP (both 0.209" and 0.173" widths acceptable for surface mount compatibility)
Voltage Supply Range: 3V ~ 5.5V
Data Rate: 250kbps minimum
Duplex Mode: Full

Substitute parts are grouped into three categories:

Direct Substitutes: Same package (16-SSOP), active product status, identical electrical specifications
Upgrade Substitutes: Enhanced receiver hysteresis (500mV) or higher data rates, same 16-SSOP package, active status
Manufacturer Recommended Substitutes: Alternative package (16-TSSOP), higher data rates (460kbps), active status with enhanced performance

Parameter Comparison

Part Number	Manufacturer	Package	Data Rate	Receiver Hysteresis	Operating Temp	Product Status	Inventory
MAX3232CDBG4	Texas Instruments	16-SSOP	250kbps	300mV	0°C ~ 70°C	Obsolete	820 Pcs
MAX3232IDBR	Texas Instruments	16-SSOP	250kbps	300mV	-40°C ~ 85°C	Active	20000 Pcs
MAX3232EEAE+	Analog Devices Inc./Maxim Integrated	16-SSOP	250kbps	500mV	-40°C ~ 85°C	Active	2000 Pcs
MAX3232EEAE+T	Analog Devices Inc./Maxim Integrated	16-SSOP	250kbps	500mV	-40°C ~ 85°C	Active	17900 Pcs
SP3232EBEA-L/TR	MaxLinear, Inc.	16-SSOP	250kbps	300mV	-40°C ~ 85°C	Active	29349 Pcs
ADM3202ARUZ	Analog Devices Inc.	16-TSSOP	460kbps	400mV	-40°C ~ 85°C	Active	23808 Pcs
ADM3202ARUZ-REEL	Analog Devices Inc.	16-TSSOP	460kbps	400mV	-40°C ~ 85°C	Active	25400 Pcs
ADM3202ARUZ-REEL7	Analog Devices Inc.	16-TSSOP	460kbps	400mV	-40°C ~ 85°C	Active	20200 Pcs
ADM3232EARUZ	Analog Devices Inc.	16-TSSOP	460kbps	500mV	-40°C ~ 85°C	Active	1340 Pcs
ADM3232EARUZ-REEL7	Analog Devices Inc.	16-TSSOP	460kbps	500mV	-40°C ~ 85°C	Active	30400 Pcs
ICL3232CVZ	Renesas Electronics Corporation	16-TSSOP	250kbps	300mV	0°C ~ 70°C	Active	1811 Pcs

Engineering Selection Recommendations

For direct replacement of the MAX3232CDBG4 in active production designs, MAX3232IDBR is the primary choice. It maintains identical electrical specifications and 16-SSOP packaging while offering active product status and extended operating temperature range (-40°C to 85°C). This part provides superior long-term availability and supply chain stability.

SP3232EBEA-L/TR from MaxLinear offers equivalent electrical performance with the same 16-SSOP footprint and significantly higher inventory availability (29349 units). This part is suitable for designs where manufacturer diversity is acceptable.

For designs requiring enhanced receiver hysteresis (500mV) or higher data rates (460kbps), the ADM3202ARUZ and ADM3232EARUZ series from Analog Devices provide manufacturer-recommended alternatives. These parts use the 16-TSSOP package (0.173" width) and deliver 460kbps data rates. PCB layout modifications are required to accommodate the different package footprint.

All substitute parts listed maintain ROHS3 compliance and are classified as active products with established supply chains.

Frequently Asked Questions (FAQ)

Q: Can MAX3232IDBR directly replace MAX3232CDBG4 without PCB modifications?

A: Yes. Both parts use the 16-SSOP package with identical pinout and electrical specifications. No PCB layout changes are required.

Q: What is the difference between 16-SSOP and 16-TSSOP packages?

A: The 16-SSOP package is 0.209" wide, while 16-TSSOP is 0.173" wide. Both are surface-mount packages with different footprints. PCB redesign is necessary when switching between these package types.

Q: Are the ADM3202 and ADM3232 parts compatible with the original MAX3232CDBG4 design?

A: These parts are functionally compatible as RS232 transceivers but require PCB layout changes due to the 16-TSSOP package. They offer higher data rates (460kbps vs. 250kbps) and extended operating temperature ranges.

Q: Why does MAX3232EEAE+ have 500mV receiver hysteresis instead of 300mV?

A: The 500mV hysteresis specification is a parameter variation within the MAX3232 product family. This enhanced hysteresis provides improved noise immunity in certain applications while maintaining full RS232 protocol compliance.

Q: Which substitute part has the best inventory availability?

A: SP3232EBEA-L/TR has the highest inventory level at 29349 units, followed by ADM3232EARUZ-REEL7 at 30400 units. Both are active products with established supply chains.

Q: Can I use ICL3232CVZ as a direct replacement?

A: ICL3232CVZ is functionally equivalent but uses the 16-TSSOP package, requiring PCB modifications. It maintains the same 250kbps data rate and 300mV hysteresis as the original part.

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