MAX232INE4 Equivalent & Substitute Parts

Part Overview

The MAX232INE4 is a 2/2 full-duplex RS232 transceiver manufactured by Texas Instruments, housed in a 16-pin DIP package. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. The MAX232INE4 operates within a 4.5V to 5.5V supply voltage range with a maximum data rate of 120 Kbps and supports operating temperatures from -40°C to 85°C. Identifying compatible alternatives ensures design continuity and component availability.

Key Parameters

Parameter	MAX232INE4 Specification
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	2/2
Duplex	Full
Receiver Hysteresis	500 mV
Data Rate	120 Kbps
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Through Hole
Package / Case	16-DIP (0.300", 7.62mm)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the MAX232INE4 is determined by strict adherence to the following electrical and mechanical parameters:

Protocol: RS232 full-duplex transceiver with 2/2 driver/receiver configuration
Package: 16-DIP (0.300", 7.62mm) through-hole mounting
Supply Voltage: 4.5V ~ 5.5V
Operating Temperature Range: -40°C ~ 85°C (extended industrial range)
Receiver Hysteresis: 500 mV tolerance
Data Rate: Minimum 120 Kbps capability

Substitute parts are grouped into two categories:

Manufacturer Recommended Substitutes: Parts with active product status from established manufacturers, meeting or exceeding the electrical specifications of the MAX232INE4.

Parametric Equivalents: Parts with matching electrical characteristics and package specifications, including obsolete parts that maintain full compatibility.

Parameter Comparison

Part Number	Manufacturer	Product Status	Drivers/Receivers	Receiver Hysteresis	Data Rate	Supply Voltage	Operating Temperature	Package
MAX232INE4	Texas Instruments	Obsolete	2/2	500 mV	120 Kbps	4.5V ~ 5.5V	-40°C ~ 85°C	16-DIP
MAX232EIN	Texas Instruments	Active	2/2	500 mV	250 Kbps	4.5V ~ 5.5V	-40°C ~ 85°C	16-DIP
TRS202EIN	Texas Instruments	Obsolete	2/2	500 mV	120 Kbps	4.5V ~ 5.5V	-40°C ~ 85°C	16-DIP
ADM202JNZ	Analog Devices Inc.	Active	2/2	400 mV	—	4.5V ~ 5.5V	0°C ~ 70°C	16-DIP
ADM232AANZ	Analog Devices Inc.	Active	2/2	400 mV	200 Kbps	4.5V ~ 5.5V	-40°C ~ 85°C	16-DIP
ADM232LANZ	Analog Devices Inc.	Active	2/2	650 mV	120 Kbps	4.5V ~ 5.5V	-40°C ~ 85°C	16-DIP
ADM232LJNZ	Analog Devices Inc.	Active	2/2	650 mV	120 Kbps	4.5V ~ 5.5V	0°C ~ 70°C	16-DIP
HIN232ACPZ	Renesas Electronics Corporation	Active	2/2	500 mV	230 Kbps	4.5V ~ 5.5V	0°C ~ 70°C	16-DIP
HIN232CPZ	Renesas Electronics Corporation	Active	2/2	500 mV	120 Kbps	4.5V ~ 5.5V	0°C ~ 70°C	16-DIP
HIN232ECPZ	Renesas Electronics Corporation	Active	2/2	500 mV	230 Kbps	4.5V ~ 5.5V	0°C ~ 70°C	16-DIP
LT1081CN#PBF	Analog Devices Inc.	Active	2/2	400 mV	250 KBd	4.5V ~ 5.5V	0°C ~ 70°C	16-DIP

Engineering Selection Recommendations

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

MAX232EIN is the primary active substitute from Texas Instruments, maintaining the same manufacturer lineage with improved data rate performance (250 Kbps vs. 120 Kbps) and active product status. ADM232AANZ from Analog Devices provides an alternative with 200 Kbps data rate capability and full temperature range support. ADM232LANZ offers identical temperature range with 120 Kbps data rate matching the original specification.

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

HIN232CPZ and HIN232ECPZ from Renesas Electronics Corporation provide active alternatives with 500 mV receiver hysteresis matching the MAX232INE4. HIN232ECPZ offers enhanced data rate performance at 230 Kbps. ADM232LJNZ from Analog Devices supports the standard temperature range with 120 Kbps data rate.

Compliance Considerations:

All substitute parts listed maintain ROHS3 compliance and REACH unaffected status, consistent with the original MAX232INE4. Selection should prioritize active product status parts for new designs to ensure long-term availability and manufacturer support.

Frequently Asked Questions (FAQ)

Q: Can MAX232EIN directly replace MAX232INE4 in existing designs?

A: Yes. MAX232EIN maintains identical electrical specifications (2/2 RS232 transceiver, 500 mV hysteresis, 4.5V ~ 5.5V supply, -40°C ~ 85°C operating range) and 16-DIP package. The higher data rate (250 Kbps vs. 120 Kbps) is backward compatible. Both use identical pinouts and require no circuit modifications.

Q: What is the difference between receiver hysteresis values across substitutes?

A: Receiver hysteresis determines the voltage differential required for input signal transitions. The MAX232INE4 specifies 500 mV. Substitutes with 400 mV hysteresis (ADM202JNZ, ADM232AANZ, LT1081CN#PBF) provide tighter input thresholds, while 650 mV variants (ADM232LANZ, ADM232LJNZ) require larger voltage swings. Selection depends on signal integrity requirements in the target application.

Q: Are there temperature range limitations when substituting?

A: Yes. The MAX232INE4 operates from -40°C to 85°C. Substitutes with 0°C ~ 70°C operating ranges (ADM202JNZ, HIN232ACPZ, HIN232CPZ, HIN232ECPZ, LT1081CN#PBF) are unsuitable for applications requiring extended low-temperature operation below 0°C or high-temperature operation above 70°C. Verify application temperature requirements before selection.

Q: Does data rate affect substitution compatibility?

A: Data rate is not a limiting factor for substitution. The MAX232INE4 specifies 120 Kbps minimum. Substitutes with higher data rates (MAX232EIN at 250 Kbps, HIN232ACPZ and HIN232ECPZ at 230 Kbps, ADM232AANZ at 200 Kbps, LT1081CN#PBF at 250 KBd) are fully compatible and provide performance headroom. Lower data rate applications operate within the higher-rated parts' specifications.

Q: Is the 16-DIP package consistent across all substitutes?

A: Yes. All listed substitutes use the 16-DIP (0.300", 7.62mm) through-hole package with identical pinouts. No PCB layout modifications are required for mechanical compatibility.

Q: Which substitute offers the best availability?

A: HIN232ECPZ (10,100 pcs), HIN232CPZ (9,431 pcs), and ADM232LJNZ (5,140 pcs) show the highest inventory levels. MAX232EIN (1,962 pcs) and ADM232AANZ (2,432 pcs) provide active Texas Instruments and Analog Devices alternatives with strong stock positions.

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