DS232A-N+ RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The DS232A-N+ is a 2/2 full-duplex RS232 transceiver manufactured by Analog Devices Inc./Maxim Integrated in a 16-pin DIP package. This interface IC is designed for serial communication applications requiring RS232 protocol compliance. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing system support, design updates, and production continuity. Active alternatives with compatible electrical and mechanical specifications are available from multiple manufacturers including Analog Devices, Maxim Integrated, and Renesas Electronics.

Key Parameters

Parameter	DS232A-N+ Specification
Manufacturer	Analog Devices Inc./Maxim Integrated
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	2/2
Duplex Mode	Full
Receiver Hysteresis	500 mV
Data Rate	350 kbps
Voltage Supply Range	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Through Hole
Package	16-DIP (0.300", 7.62mm)
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the DS232A-N+ is determined by the following critical parameters:

Primary Compatibility Criteria:

Protocol: RS232
Number of Drivers/Receivers: 2/2
Duplex Mode: Full
Voltage Supply Range: 4.5V ~ 5.5V
Package Type: 16-DIP (Through Hole) or 16-TSSOP (Surface Mount)
RoHS Compliance: ROHS3 Compliant

Secondary Compatibility Considerations:

Receiver Hysteresis: 400 mV to 650 mV (acceptable variance)
Data Rate: 120 kbps to 350 kbps (application-dependent)
Operating Temperature: -40°C ~ 85°C (industrial grade) or 0°C ~ 70°C (commercial grade)

Substitute parts are grouped into two categories: Through-Hole DIP Package Equivalents (direct pin-compatible replacements) and Surface-Mount TSSOP Alternatives (for redesigned layouts). All listed substitutes maintain full RS232 protocol compliance, 2/2 transceiver configuration, and 4.5V ~ 5.5V supply voltage specifications.

Parameter Comparison

Part Number	Manufacturer	Package	Mounting	Data Rate	Receiver Hysteresis	Operating Temp	Product Status	Inventory
DS232A-N+	Analog Devices/Maxim	16-DIP	Through Hole	350 kbps	500 mV	-40°C ~ 85°C	Obsolete	899 Pcs
MAX232AEUE+	Analog Devices/Maxim	16-TSSOP	Surface Mount	200 kbps	500 mV	-40°C ~ 85°C	Active	1756 Pcs
ADM232AANZ	Analog Devices	16-DIP	Through Hole	200 kbps	400 mV	-40°C ~ 85°C	Active	2432 Pcs
ADM232LANZ	Analog Devices	16-DIP	Through Hole	120 kbps	650 mV	-40°C ~ 85°C	Active	2200 Pcs
ADM232LJNZ	Analog Devices	16-DIP	Through Hole	120 kbps	650 mV	0°C ~ 70°C	Active	5140 Pcs
HIN232ACPZ	Renesas Electronics	16-DIP	Through Hole	230 kbps	500 mV	0°C ~ 70°C	Active	3300 Pcs
HIN232CPZ	Renesas Electronics	16-DIP	Through Hole	120 kbps	500 mV	0°C ~ 70°C	Active	9431 Pcs
HIN232ECPZ	Renesas Electronics	16-DIP	Through Hole	230 kbps	500 mV	0°C ~ 70°C	Active	10100 Pcs
HIN232IPZ	Renesas Electronics	16-DIP	Through Hole	120 kbps	500 mV	-40°C ~ 85°C	Active	10200 Pcs
LT1081CN#PBF	Analog Devices	16-DIP	Through Hole	250 kbps	400 mV	0°C ~ 70°C	Active	2148 Pcs
LT1081IN#PBF	Analog Devices	16-DIP	Through Hole	250 kbps	400 mV	-40°C ~ 85°C	Active	948 Pcs

Engineering Selection Recommendations

For Direct Through-Hole DIP Replacement (Pin-Compatible):

Select from ADM232AANZ, ADM232LANZ, HIN232ACPZ, HIN232CPZ, HIN232ECPZ, HIN232IPZ, LT1081CN#PBF, or LT1081IN#PBF. All maintain 16-DIP package geometry and through-hole mounting compatibility. ADM232AANZ and LT1081IN#PBF provide the closest operating temperature range match (-40°C ~ 85°C) to the original DS232A-N+. HIN232IPZ also covers the full industrial temperature range while offering 500 mV receiver hysteresis matching the original specification.

For Surface-Mount Redesign:

MAX232AEUE+ is the only surface-mount option provided, using 16-TSSOP packaging. This part is suitable for new PCB layouts requiring compact form factors and automated assembly processes. It maintains full -40°C ~ 85°C operating temperature coverage and 500 mV receiver hysteresis.

Compliance and Availability:

All substitute parts are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes. All carry MSL 1 (Unlimited) moisture sensitivity rating. Active product status ensures long-term availability and supply chain stability compared to the obsolete DS232A-N+.

Data Rate Considerations:

The DS232A-N+ operates at 350 kbps. Most substitutes operate at 120–250 kbps. For applications requiring the original 350 kbps data rate, verify that the selected substitute's lower data rate specification does not conflict with system requirements. LT1081CN#PBF and LT1081IN#PBF provide 250 kbps operation, the closest match to the original specification.

Frequently Asked Questions (FAQ)

Q: Can I use a 16-TSSOP surface-mount part as a direct replacement for the 16-DIP through-hole DS232A-N+?

A: No. The MAX232AEUE+ uses 16-TSSOP surface-mount packaging and requires PCB redesign. Through-hole DIP packages (ADM232AANZ, HIN232ACPZ, HIN232CPZ, HIN232ECPZ, HIN232IPZ, LT1081CN#PBF, LT1081IN#PBF) are pin-compatible with the original 16-DIP footprint.

Q: What is the difference between commercial-grade (0°C ~ 70°C) and industrial-grade (-40°C ~ 85°C) operating temperature specifications?

A: Industrial-grade parts (ADM232AANZ, ADM232LANZ, HIN232IPZ, LT1081IN#PBF, MAX232AEUE+) operate across the full -40°C ~ 85°C range, suitable for automotive, aerospace, and harsh environment applications. Commercial-grade parts (ADM232LJNZ, HIN232ACPZ, HIN232CPZ, HIN232ECPZ, LT1081CN#PBF) operate only at 0°C ~ 70°C and are appropriate for standard industrial and consumer electronics.

Q: Does receiver hysteresis affect RS232 protocol compatibility?

A: Receiver hysteresis (400 mV, 500 mV, or 650 mV) is a design parameter that affects noise immunity and signal detection thresholds. All listed substitutes maintain RS232 protocol compliance. Hysteresis variance does not prevent substitution but may affect performance in noisy environments. The original DS232A-N+ specifies 500 mV; HIN232ACPZ, HIN232CPZ, HIN232ECPZ, HIN232IPZ, and MAX232AEUE+ match this specification exactly.

Q: Why do some substitutes have lower data rates than the original DS232A-N+ (350 kbps)?

A: Data rate specifications reflect the maximum baud rate the transceiver supports. Most modern RS232 applications operate at 115.2 kbps or lower. Substitutes with 120–250 kbps ratings are suitable for standard serial communication. If your application requires 350 kbps operation, select LT1081CN#PBF or LT1081IN#PBF (250 kbps) as the closest alternatives, or verify that lower-rated parts meet your actual system requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification and are REACH unaffected, meeting current environmental and regulatory requirements for electronics manufacturing and distribution.

Q: Which substitute offers the best inventory availability?

A: HIN232IPZ (10,200 pcs), HIN232ECPZ (10,100 pcs), and HIN232CPZ (9,431 pcs) from Renesas Electronics offer the highest stock levels, ensuring supply chain reliability for volume production and long-term support.

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