DS232AR-N+ RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The DS232AR-N+ is a 2/2 full-duplex RS232 transceiver manufactured by Analog Devices Inc./Maxim Integrated, housed in a 16-SOIC package. This interface IC operates across the 4.5V to 5.5V supply range with a data rate of 350kbps and 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 electrical specifications, mechanical packaging, and functional performance parameters.

Key Parameters

Parameter	DS232AR-N+
Manufacturer	Analog Devices Inc./Maxim Integrated
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	2/2
Duplex	Full
Receiver Hysteresis	500 mV
Data Rate	350kbps
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	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the DS232AR-N+ is determined by the following critical parameters:

Protocol compatibility: RS232 full-duplex transceiver
Electrical interface: 2/2 drivers/receivers configuration
Supply voltage range: 4.5V ~ 5.5V
Operating temperature range: -40°C ~ 85°C minimum
Mounting type: Surface mount
Package type: 16-SOIC
Data rate capability: Minimum 350kbps
Receiver hysteresis: 500 mV nominal
Compliance: ROHS3 compliant

Substitute parts are grouped into two categories based on package width and performance characteristics:

Category A (Wide Package, 0.295" / 7.50mm): ADM232LARZ, ADM232LARZ-REEL, HIN232CBZ, HIN232CBZ-T

Category B (Narrow Package, 0.154" / 3.90mm): MAX232AESE+, ADM232AARNZ, ADM232AARNZ-REEL, ADM232AARNZ-REEL7, HIN232ACBNZ, HIN232ACBNZ-T

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Data Rate	Supply Voltage	Operating Temp	Package Width	Receiver Hysteresis	Product Status	RoHS Status
DS232AR-N+	Analog Devices/Maxim	RS232	2/2	350kbps	4.5V ~ 5.5V	-40°C ~ 85°C	0.295" (7.50mm)	500 mV	Obsolete	ROHS3
MAX232AESE+	Analog Devices/Maxim	RS232	2/2	200kbps	4.5V ~ 5.5V	-40°C ~ 85°C	0.154" (3.90mm)	500 mV	Active	ROHS3
ADM232AARNZ	UMW	RS232	2/2	120kbps	4.5V ~ 5.5V	-40°C ~ 85°C	0.154" (3.90mm)	Not specified	Active	ROHS3
ADM232AARNZ-REEL	Analog Devices	RS232	2/2	200kbps	4.5V ~ 5.5V	-40°C ~ 85°C	0.154" (3.90mm)	400 mV	Active	ROHS3
ADM232AARNZ-REEL7	Analog Devices	RS232	2/2	200kbps	4.5V ~ 5.5V	-40°C ~ 85°C	0.154" (3.90mm)	400 mV	Active	ROHS3
ADM232LARZ	Analog Devices	RS232	2/2	120kbps	4.5V ~ 5.5V	-40°C ~ 85°C	0.295" (7.50mm)	650 mV	Active	ROHS3
ADM232LARZ-REEL	Analog Devices	RS232	2/2	120kbps	4.5V ~ 5.5V	-40°C ~ 85°C	0.295" (7.50mm)	650 mV	Active	ROHS3
HIN232ACBNZ	Renesas Electronics	RS232	2/2	230kbps	4.5V ~ 5.5V	0°C ~ 70°C	0.154" (3.90mm)	500 mV	Active	ROHS3
HIN232ACBNZ-T	Renesas Electronics	RS232	2/2	230kbps	4.5V ~ 5.5V	0°C ~ 70°C	0.154" (3.90mm)	500 mV	Active	ROHS3
HIN232CBZ	Renesas Electronics	RS232	2/2	120kbps	4.5V ~ 5.5V	0°C ~ 70°C	0.295" (7.50mm)	500 mV	Active	ROHS3
HIN232CBZ-T	Renesas Electronics	RS232	2/2	120kbps	4.5V ~ 5.5V	0°C ~ 70°C	0.295" (7.50mm)	500 mV	Active	ROHS3

Engineering Selection Recommendations

All substitute parts listed are ROHS3 compliant and active products from established manufacturers (Analog Devices, UMW, Renesas Electronics), ensuring long-term availability and supply chain stability compared to the obsolete DS232AR-N+.

For applications requiring the original 0.295" (7.50mm) wide package footprint, ADM232LARZ, ADM232LARZ-REEL, HIN232CBZ, and HIN232CBZ-T maintain mechanical compatibility. The ADM232LARZ series from Analog Devices provides the closest electrical match with identical supply voltage and operating temperature range.

For applications where PCB space is constrained and the narrower 0.154" (3.90mm) package is acceptable, MAX232AESE+, ADM232AARNZ-REEL, ADM232AARNZ-REEL7, HIN232ACBNZ, and HIN232ACBNZ-T are suitable alternatives. The MAX232AESE+ maintains the original 500 mV receiver hysteresis specification.

Applications operating across the full -40°C to 85°C temperature range require ADM232 series parts or MAX232AESE+. Renesas HIN232 parts operate only to 0°C minimum and are suitable for commercial temperature range applications only.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a lower data rate than the DS232AR-N+?

A: The DS232AR-N+ operates at 350kbps. Substitute parts with lower data rates (120kbps, 200kbps, 230kbps) are functionally compatible for RS232 communication but are rated for lower maximum throughput. Selection depends on actual system data rate requirements, not the part's maximum capability.

Q: What is the difference between the wide (0.295") and narrow (0.154") package options?

A: Package width affects PCB footprint and component density. The 0.295" wide package (DS232AR-N+, ADM232LARZ, HIN232CBZ) requires more board space. The 0.154" narrow package (MAX232AESE+, ADM232AARNZ, HIN232ACBNZ) is more compact. Both are 16-SOIC packages with identical pin counts and electrical interfaces. Selection is determined by PCB layout requirements.

Q: Why do some substitute parts have different receiver hysteresis values?

A: Receiver hysteresis (400 mV, 500 mV, 650 mV) affects input threshold characteristics. The DS232AR-N+ specifies 500 mV. Substitutes with different hysteresis values (ADM232AARNZ-REEL at 400 mV, ADM232LARZ at 650 mV) have different noise immunity characteristics. Selection should match the original specification unless system design accommodates the variation.

Q: Are Renesas HIN232 parts suitable for all applications?

A: Renesas HIN232 parts operate from 0°C to 70°C, which is a narrower temperature range than the DS232AR-N+ (-40°C to 85°C). HIN232 parts are suitable only for commercial temperature range applications. Industrial or extended temperature applications require ADM232 or MAX232 series parts.

Q: What is the difference between tube and reel packaging?

A: Tube packaging (MAX232AESE+, HIN232ACBNZ, HIN232CBZ) is suitable for lower-volume applications and manual assembly. Cut Tape & Digi-Reel packaging (ADM232AARNZ-REEL, ADM232LARZ-REEL, HIN232ACBNZ-T, HIN232CBZ-T) is designed for automated pick-and-place assembly and higher-volume production. Electrical specifications are identical; packaging choice depends on assembly process requirements.

Q: Can I substitute the DS232AR-N+ with any of these parts without PCB modification?

A: Substitutes maintaining the 0.295" (7.50mm) wide 16-SOIC package (ADM232LARZ, ADM232LARZ-REEL, HIN232CBZ, HIN232CBZ-T) are pin-compatible drop-in replacements. Substitutes with the 0.154" (3.90mm) narrow package require PCB footprint modification. Verify pinout compatibility before assembly.

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