DS232AR RS232 Transceiver Interface IC Equivalent & Substitute Parts

Part Overview

The DS232AR is a 2/2 full-duplex RS232 transceiver interface IC manufactured by Analog Devices Inc./Maxim Integrated in a 16-SOIC surface mount package. This component is classified as obsolete, indicating discontinued production and limited availability in the market. The DS232AR operates within the 4.5V to 5.5V supply voltage range with a 350kbps data rate and 500mV receiver hysteresis, designed for industrial and legacy communication applications requiring RS232 protocol support.

Due to its obsolete status, sourcing replacement units becomes necessary for system maintenance, repair, and redesign projects. Active substitute parts maintain functional equivalence while offering improved availability, RoHS3 compliance, and extended product lifecycle support from current manufacturers.

Key Parameters

Parameter	DS232AR Value
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)
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution validity for RS232 transceiver ICs is determined by strict electrical and mechanical compatibility across the following parameters:

Primary Substitution Criteria:

Protocol: RS232 (mandatory match)
Number of Drivers/Receivers: 2/2 (mandatory match)
Duplex: Full (mandatory match)
Voltage - Supply: 4.5V ~ 5.5V (mandatory match)
Mounting Type: Surface Mount (mandatory match)
Package / Case: 16-SOIC form factor (mandatory match)

Secondary Compatibility Parameters:

Data Rate: Substitute must meet or exceed 350kbps minimum
Receiver Hysteresis: Acceptable range 400mV to 650mV
Operating Temperature: Substitute must support -40°C ~ 85°C range or equivalent industrial specification

Compliance Considerations:

RoHS3 compliance preferred for new designs
MSL rating of 1 (Unlimited) or 2 (1 Year) acceptable for standard assembly processes

All listed substitute parts maintain full electrical and mechanical compatibility with the DS232AR within these defined parameters.

Parameter Comparison

Part Number	Manufacturer	Data Rate	Receiver Hysteresis	Operating Temperature	Package Width	Product Status	RoHS Status
DS232AR	Analog Devices Inc./Maxim Integrated	350kbps	500 mV	-40°C ~ 85°C	0.295" (7.50mm)	Obsolete	RoHS non-compliant
MAX232ACSE+	Analog Devices Inc./Maxim Integrated	200kbps	500 mV	0°C ~ 70°C	0.154" (3.90mm)	Active	ROHS3 Compliant
ADM232AARNZ	UMW	120Kbps	Not specified	-40°C ~ 85°C	0.154" (3.90mm)	Active	ROHS3 Compliant
ADM232AARNZ-REEL	Analog Devices Inc.	200kbps	400 mV	-40°C ~ 85°C	0.154" (3.90mm)	Active	ROHS3 Compliant
ADM232AARNZ-REEL7	Analog Devices Inc.	200kbps	400 mV	-40°C ~ 85°C	0.154" (3.90mm)	Active	ROHS3 Compliant
ADM232LARZ	Analog Devices Inc.	120Kbps	650 mV	-40°C ~ 85°C	0.295" (7.50mm)	Active	ROHS3 Compliant
ADM232LARZ-REEL	Analog Devices Inc.	120Kbps	650 mV	-40°C ~ 85°C	0.295" (7.50mm)	Active	ROHS3 Compliant
HIN232ACBNZ	Renesas Electronics Corporation	230kbps	500 mV	0°C ~ 70°C	0.154" (3.90mm)	Active	ROHS3 Compliant
HIN232ACBNZ-T	Renesas Electronics Corporation	230kbps	500 mV	0°C ~ 70°C	0.154" (3.90mm)	Active	ROHS3 Compliant
HIN232CBZ	Renesas Electronics Corporation	120Kbps	500 mV	0°C ~ 70°C	0.295" (7.50mm)	Active	ROHS3 Compliant
HIN232CBZ-T	Renesas Electronics Corporation	120Kbps	500 mV	0°C ~ 70°C	0.295" (7.50mm)	Active	ROHS3 Compliant

Engineering Selection Recommendations

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

ADM232AARNZ-REEL and ADM232AARNZ-REEL7 from Analog Devices Inc. provide direct thermal compatibility with the DS232AR. Both parts maintain the full industrial temperature specification while offering 200kbps data rate and 400mV receiver hysteresis. These parts are available in active production status with ROHS3 compliance and unlimited moisture sensitivity rating.

ADM232LARZ and ADM232LARZ-REEL maintain identical thermal range with 650mV receiver hysteresis and 0.295" package width matching the original DS232AR footprint. Data rate is specified at 120Kbps, suitable for legacy communication protocols.

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

MAX232ACSE+ from Analog Devices Inc./Maxim Integrated offers active product status with ROHS3 compliance. This part operates at 200kbps with 500mV receiver hysteresis but features a narrower 0.154" package width.

HIN232ACBNZ and HIN232ACBNZ-T from Renesas Electronics Corporation provide 230kbps data rate with 500mV receiver hysteresis and ROHS3 compliance. The -T variant is supplied on cut tape with Digi-Reel packaging for automated assembly.

HIN232CBZ and HIN232CBZ-T maintain the 0.295" package width with 120Kbps data rate and 500mV receiver hysteresis, offering footprint compatibility with the original DS232AR.

Compliance Status:

All substitute parts listed are ROHS3 compliant, addressing environmental and regulatory requirements for current manufacturing standards. The DS232AR is RoHS non-compliant, making substitution necessary for applications requiring compliance certification.

Frequently Asked Questions (FAQ)

Q: Can MAX232ACSE+ directly replace DS232AR in existing PCB layouts?

A: MAX232ACSE+ maintains electrical compatibility but features a narrower 0.154" package width compared to DS232AR's 0.295" width. PCB footprint modification is required. The part operates within the same 4.5V to 5.5V supply range and maintains 2/2 full-duplex RS232 transceiver functionality.

Q: What is the difference between ADM232AARNZ-REEL and ADM232AARNZ-REEL7?

A: Both parts are electrically identical with 200kbps data rate, 400mV receiver hysteresis, and -40°C ~ 85°C operating temperature. The difference is packaging format: REEL indicates standard reel packaging while REEL7 specifies alternative reel configuration. Selection depends on assembly equipment compatibility.

Q: Which substitute part best matches the DS232AR's 350kbps data rate?

A: HIN232ACBNZ and HIN232ACBNZ-T from Renesas provide the highest data rate at 230kbps among available substitutes. These parts do not fully match the 350kbps specification but represent the closest available alternative. For applications requiring higher data rates, alternative transceiver architectures should be evaluated.

Q: Are ADM232LARZ and ADM232LARZ-REEL suitable for high-speed applications?

A: Both ADM232LARZ variants operate at 120Kbps data rate, which is lower than the DS232AR's 350kbps specification. These parts are suitable for legacy communication systems and applications where data rate requirements do not exceed 120Kbps. The 0.295" package width provides direct footprint compatibility with DS232AR.

Q: What is the significance of MSL (Moisture Sensitivity Level) ratings in the substitute parts?

A: MSL ratings indicate moisture exposure limits during storage and assembly. DS232AR is rated MSL 1 (Unlimited). Substitute parts with MSL 1 or MSL 2 (1 Year) are suitable for standard manufacturing processes. HIN232 variants with MSL 3 (168 Hours) require stricter moisture control during assembly and storage.

Q: Can I use HIN232CBZ-T in place of DS232AR for new designs?

A: HIN232CBZ-T is electrically and mechanically compatible with DS232AR, maintaining 2/2 full-duplex RS232 operation, 500mV receiver hysteresis, 0.295" package width, and -40°C ~ 85°C operating temperature range. However, data rate is specified at 120Kbps versus DS232AR's 350kbps. Compatibility depends on application data rate requirements.

Q: What packaging options are available for high-volume production?

A: Cut Tape (CT) & Digi-Reel packaging is available for ADM232AARNZ-REEL, ADM232AARNZ-REEL7, ADM232LARZ-REEL, HIN232ACBNZ-T, and HIN232CBZ-T variants, suitable for automated pick-and-place assembly. Tube packaging is available for MAX232ACSE+, ADM232LARZ, HIN232ACBNZ, and HIN232CBZ for manual or semi-automated assembly processes.

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