DS232AR/T&R RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The DS232AR/T&R is a 2/2 full-duplex RS232 transceiver manufactured by Analog Devices Inc./Maxim Integrated in a 16-SOIC package. This interface IC operates within the 4.5V to 5.5V supply voltage range and supports data rates up to 350 kbps with a receiver hysteresis of 500 mV. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations. Substitute parts must maintain compatibility across protocol, duplex configuration, driver/receiver count, supply voltage, and package specifications.

Key Parameters

Parameter	DS232AR/T&R
Protocol	RS232
Type	Transceiver
Number of Drivers/Receivers	2/2
Duplex	Full
Receiver Hysteresis	500 mV
Data Rate	350 kbps
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	16-SOIC (0.295", 7.50mm Width)
RoHS Status	RoHS non-compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the DS232AR/T&R is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters for Substitution:

Protocol: RS232
Type: Transceiver
Number of Drivers/Receivers: 2/2
Duplex: Full
Voltage - Supply: 4.5V ~ 5.5V
Mounting Type: Surface Mount
Package / Case: 16-SOIC

Acceptable Variation Parameters:

Data Rate: Substitute parts may operate at lower data rates than the original 350 kbps specification, provided the minimum rate supports the application requirement
Operating Temperature: Substitute parts with narrower temperature ranges (0°C ~ 70°C) are acceptable for applications not requiring the full -40°C ~ 85°C range
Receiver Hysteresis: Variations between 400 mV and 650 mV are acceptable within RS232 specifications
RoHS Status: Active substitute parts with ROHS3 compliance are preferred over the obsolete non-compliant original
Package Width: Both 0.154" (3.90mm) and 0.295" (7.50mm) SOIC variants are acceptable based on PCB layout requirements

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Duplex	Data Rate	Supply Voltage	Operating Temp	Package Width	Product Status	RoHS Status
DS232AR/T&R	Analog Devices Inc./Maxim Integrated	RS232	2/2	Full	350 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	0.295" (7.50mm)	Obsolete	Non-compliant
MAX232ACSE+	Analog Devices Inc./Maxim Integrated	RS232	2/2	Full	200 kbps	4.5V ~ 5.5V	0°C ~ 70°C	0.154" (3.90mm)	Active	ROHS3 Compliant
ADM232AARNZ	UMW	RS232	2/2	Full	120 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	0.154" (3.90mm)	Active	ROHS3 Compliant
ADM232AARNZ-REEL	Analog Devices Inc.	RS232	2/2	Full	200 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	0.154" (3.90mm)	Active	ROHS3 Compliant
ADM232AARNZ-REEL7	Analog Devices Inc.	RS232	2/2	Full	200 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	0.154" (3.90mm)	Active	ROHS3 Compliant
ADM232LARZ	Analog Devices Inc.	RS232	2/2	Full	120 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	0.295" (7.50mm)	Active	ROHS3 Compliant
ADM232LARZ-REEL	Analog Devices Inc.	RS232	2/2	Full	120 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	0.295" (7.50mm)	Active	ROHS3 Compliant
HIN232ACBNZ	Renesas Electronics Corporation	RS232	2/2	Full	230 kbps	4.5V ~ 5.5V	0°C ~ 70°C	0.154" (3.90mm)	Active	ROHS3 Compliant
HIN232ACBNZ-T	Renesas Electronics Corporation	RS232	2/2	Full	230 kbps	4.5V ~ 5.5V	0°C ~ 70°C	0.154" (3.90mm)	Active	ROHS3 Compliant
HIN232CBZ	Renesas Electronics Corporation	RS232	2/2	Full	120 kbps	4.5V ~ 5.5V	0°C ~ 70°C	0.295" (7.50mm)	Active	ROHS3 Compliant
HIN232CBZ-T	Renesas Electronics Corporation	RS232	2/2	Full	120 kbps	4.5V ~ 5.5V	0°C ~ 70°C	0.295" (7.50mm)	Active	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts maintain the core RS232 2/2 full-duplex transceiver functionality with 4.5V to 5.5V supply compatibility and surface-mount 16-SOIC packaging. Selection between substitutes depends on specific application requirements:

For Extended Temperature Range Applications (-40°C ~ 85°C): ADM232AARNZ-REEL, ADM232AARNZ-REEL7, ADM232LARZ, and ADM232LARZ-REEL maintain the full temperature operating range of the original DS232AR/T&R. ADM232AARNZ-REEL and ADM232AARNZ-REEL7 support 200 kbps data rates, while ADM232LARZ and ADM232LARZ-REEL operate at 120 kbps.

For Commercial Temperature Range Applications (0°C ~ 70°C): MAX232ACSE+, HIN232ACBNZ, and HIN232ACBNZ-T are suitable for applications not requiring extended low-temperature operation. HIN232ACBNZ and HIN232ACBNZ-T support higher data rates at 230 kbps.

For Package Footprint Compatibility: Parts with 0.295" (7.50mm) width SOIC packages (ADM232LARZ, ADM232LARZ-REEL, HIN232CBZ, HIN232CBZ-T) provide direct PCB layout compatibility with the original DS232AR/T&R. Parts with 0.154" (3.90mm) width packages require PCB redesign but offer smaller footprint advantages.

For Regulatory Compliance: All substitute parts carry ROHS3 compliance status, addressing the non-compliant status of the obsolete DS232AR/T&R. All parts maintain REACH Unaffected status and EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a lower data rate than the original 350 kbps specification?

A: Yes, provided your application does not require data rates exceeding the substitute part's specification. RS232 communication is backward compatible at lower baud rates. Verify that your system operates at or below the substitute part's maximum data rate.

Q: What is the difference between the 0.154" and 0.295" SOIC package widths?

A: Both are 16-SOIC packages with identical pin counts and electrical characteristics. The width difference affects PCB footprint size. The 0.295" (7.50mm) width matches the original DS232AR/T&R footprint. The 0.154" (3.90mm) width is a narrower variant requiring PCB layout modification.

Q: Are the ADM232AARNZ-REEL and ADM232AARNZ-REEL7 parts interchangeable?

A: Both parts are functionally equivalent with identical electrical specifications. The difference lies in packaging configuration (reel type). Select based on your procurement and assembly requirements.

Q: Can I use a part rated for 0°C ~ 70°C in an application requiring -40°C ~ 85°C operation?

A: No. Operating a part outside its specified temperature range may result in functional failure or reduced reliability. Select parts with temperature ratings matching or exceeding your application requirements.

Q: What is the significance of RoHS3 compliance for substitute selection?

A: RoHS3 compliance indicates the part meets current environmental and hazardous substance restrictions. All active substitute parts listed carry ROHS3 compliance, making them suitable for modern manufacturing and regulatory requirements. The original DS232AR/T&R is non-compliant due to its obsolete status.

Q: Do all substitute parts have the same receiver hysteresis specification?

A: No. Receiver hysteresis varies between 400 mV and 650 mV across the substitute parts. All values remain within RS232 specification tolerances. Hysteresis differences do not affect functional compatibility for standard RS232 applications.

Q: Which substitute part offers the closest electrical match to the DS232AR/T&R?

A: ADM232LARZ and ADM232LARZ-REEL provide the closest match, maintaining the 0.295" (7.50mm) SOIC package width, full -40°C ~ 85°C temperature range, and 500 mV receiver hysteresis. Data rate is reduced to 120 kbps, which is acceptable for most legacy RS232 applications.

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