DS232A RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The DS232A is a 2/2 full-duplex RS232 transceiver manufactured by Analog Devices Inc./Maxim Integrated in a 16-DIP package. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing system support. The DS232A operates within a 4.5V to 5.5V supply range with a receiver hysteresis of 500 mV and supports data rates up to 350 kbps. Substitute parts must maintain functional compatibility across RS232 protocol requirements, package form factor, and electrical operating parameters.

Key Parameters

Parameter	DS232A Specification
Manufacturer	Analog Devices Inc./Maxim Integrated
Type	Transceiver
Protocol	RS232
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	Through Hole
Package / Case	16-DIP (0.300", 7.62mm)
Supplier Device Package	16-PDIP
Product Status	Obsolete
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the DS232A are selected based on strict electrical and mechanical compatibility criteria. All substitute parts must meet the following requirements:

RS232 protocol transceiver with 2/2 driver/receiver configuration
Full-duplex operation capability
16-DIP (0.300", 7.62mm) package form factor
4.5V to 5.5V supply voltage range
Through-hole mounting type
Receiver hysteresis within acceptable range (400 mV to 650 mV)
Data rate capability of at least 120 kbps minimum

Substitutes are grouped by manufacturer and product line. Active product status and RoHS3 compliance are preferred for new designs. Operating temperature range variations are noted where they differ from the original DS232A specification of -40°C to 85°C.

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Receiver Hysteresis	Data Rate	Supply Voltage	Operating Temperature	Package	Product Status	RoHS Status
DS232A	Analog Devices Inc./Maxim Integrated	RS232	2/2	500 mV	350 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	16-DIP	Obsolete	RoHS non-compliant
MAX232ACPE+	Analog Devices Inc./Maxim Integrated	RS232	2/2	500 mV	200 kbps	4.5V ~ 5.5V	0°C ~ 70°C	16-DIP	Active	ROHS3 Compliant
ADM232AANZ	Analog Devices Inc.	RS232	2/2	400 mV	200 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	16-DIP	Active	ROHS3 Compliant
ADM232LANZ	Analog Devices Inc.	RS232	2/2	650 mV	120 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	16-DIP	Active	ROHS3 Compliant
ADM232LJNZ	Analog Devices Inc.	RS232	2/2	650 mV	120 kbps	4.5V ~ 5.5V	0°C ~ 70°C	16-DIP	Active	ROHS3 Compliant
HIN232ACPZ	Renesas Electronics Corporation	RS232	2/2	500 mV	230 kbps	4.5V ~ 5.5V	0°C ~ 70°C	16-DIP	Active	ROHS3 Compliant
HIN232CPZ	Renesas Electronics Corporation	RS232	2/2	500 mV	120 kbps	4.5V ~ 5.5V	0°C ~ 70°C	16-DIP	Active	ROHS3 Compliant
HIN232ECPZ	Renesas Electronics Corporation	RS232	2/2	500 mV	230 kbps	4.5V ~ 5.5V	0°C ~ 70°C	16-DIP	Active	ROHS3 Compliant
HIN232IPZ	Renesas Electronics Corporation	RS232	2/2	500 mV	120 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	16-DIP	Active	ROHS3 Compliant
LT1081CN#PBF	Analog Devices Inc.	RS232	2/2	400 mV	250 kbps	4.5V ~ 5.5V	0°C ~ 70°C	16-DIP	Active	ROHS3 Compliant
LT1081IN#PBF	Analog Devices Inc.	RS232	2/2	400 mV	250 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	16-DIP	Active	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts are active products with RoHS3 compliance, making them suitable for new designs requiring regulatory adherence. The DS232A itself is RoHS non-compliant and obsolete, necessitating substitution for ongoing production.

For applications requiring the full -40°C to 85°C operating temperature range of the original DS232A, select from: ADM232AANZ, ADM232LANZ, HIN232IPZ, or LT1081IN#PBF. These parts maintain the extended temperature specification while providing active product status and modern compliance certifications.

For applications with standard 0°C to 70°C operating temperature requirements, all remaining substitute parts are available with higher inventory levels and active manufacturing status.

Data rate capability should be verified against system requirements. The DS232A supports 350 kbps; substitute parts range from 120 kbps to 250 kbps. Applications requiring the original 350 kbps specification have no direct equivalent among the listed substitutes and require design review.

Receiver hysteresis values range from 400 mV to 650 mV across substitutes. The original DS232A specification of 500 mV is matched by MAX232ACPE+, HIN232ACPZ, HIN232CPZ, HIN232ECPZ, and HIN232IPZ.

Frequently Asked Questions (FAQ)

Q: Can I directly replace DS232A with any of these substitute parts?

A: Direct pin-compatible replacement is possible only if the substitute part maintains the 16-DIP package form factor, which all listed parts do. However, electrical parameter differences—particularly data rate, receiver hysteresis, and operating temperature range—must be verified against your specific application requirements before substitution.

Q: Which substitute part is the closest match to DS232A?

A: No single substitute part matches all DS232A parameters. ADM232AANZ provides the same receiver hysteresis (500 mV) and extended temperature range (-40°C to 85°C), but operates at 200 kbps instead of 350 kbps. HIN232IPZ also matches the temperature range and hysteresis but is limited to 120 kbps.

Q: What is the difference between the Analog Devices and Renesas substitute options?

A: Both manufacturers provide RS232 transceivers in the same 16-DIP package with compatible electrical specifications. Analog Devices offers the MAX232 and ADM232 series, while Renesas provides the HIN232 series. Selection depends on supply chain availability, inventory levels, and specific parameter requirements for your application.

Q: Does operating temperature range affect substitution compatibility?

A: Yes. If your application operates outside the 0°C to 70°C range, you must select a substitute with an extended temperature specification. ADM232AANZ, ADM232LANZ, HIN232IPZ, and LT1081IN#PBF all support -40°C to 85°C operation, matching the original DS232A range.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts carry RoHS3 compliance certification. The original DS232A is RoHS non-compliant, making substitution necessary for applications subject to RoHS regulatory requirements.

Q: What is receiver hysteresis and why does it matter for substitution?

A: Receiver hysteresis is the voltage difference between the rising and falling threshold levels of the RS232 receiver input. The DS232A specifies 500 mV. Substitute parts range from 400 mV to 650 mV. Higher hysteresis provides better noise immunity; lower hysteresis allows faster signal transitions. Verify that your application tolerates the hysteresis value of your chosen substitute.

Q: Can I use a substitute part with lower data rate capability than DS232A?

A: Only if your application's actual data rate requirement is lower than the substitute part's specification. The DS232A supports 350 kbps; most substitutes support 120 kbps to 250 kbps. If your system requires 350 kbps operation, no listed substitute meets this specification and design alternatives must be evaluated.

Q: What packaging options are available for these substitute parts?

A: All substitute parts are supplied in 16-DIP (0.300", 7.62mm) through-hole packages. Packaging format (Tube) is consistent across all listed parts. No surface-mount or alternative package options are included in this substitution list.

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