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 component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production support. The DS232A+ provides full RS232 protocol support with 2 drivers and 2 receivers, operating across a 4.5V to 5.5V supply voltage range and -40°C to 85°C temperature range. Substitute parts must maintain electrical compatibility while meeting current product availability and compliance requirements.

Key Parameters

Parameter	DS232A+ Specification
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	Through Hole
Package / Case	16-DIP (0.300", 7.62mm)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the DS232A+ is determined by strict adherence to the following electrical and mechanical parameters:

Critical Compatibility Parameters:

Protocol: RS232 (mandatory match)
Type: Transceiver (mandatory match)
Number of Drivers/Receivers: 2/2 (mandatory match)
Duplex: Full (mandatory match)
Voltage - Supply: 4.5V ~ 5.5V (mandatory match)
Package / Case: 16-DIP (0.300", 7.62mm) (mandatory match)
Mounting Type: Through Hole (mandatory match)

Allowable Variation Parameters:

Receiver Hysteresis: 400 mV to 650 mV (within acceptable RS232 specification range)
Data Rate: 120 kbps to 350 kbps (all exceed minimum RS232 requirements)
Operating Temperature: 0°C ~ 70°C or -40°C ~ 85°C (both acceptable for industrial applications)
Product Status: Active substitutes preferred over obsolete original

All substitute parts listed maintain ROHS3 compliance, MSL 1 rating, and identical supply voltage specifications.

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Data Rate	Receiver Hysteresis	Operating Temperature	Product Status	Inventory (Pcs)
DS232A+	Analog Devices Inc./Maxim Integrated	RS232	2/2	350 kbps	500 mV	-40°C ~ 85°C	Obsolete	1553
MAX232ACPE+	Analog Devices Inc./Maxim Integrated	RS232	2/2	200 kbps	500 mV	0°C ~ 70°C	Active	39726
ADM232AANZ	Analog Devices Inc.	RS232	2/2	200 kbps	400 mV	-40°C ~ 85°C	Active	2432
ADM232LANZ	Analog Devices Inc.	RS232	2/2	120 kbps	650 mV	-40°C ~ 85°C	Active	2200
ADM232LJNZ	Analog Devices Inc.	RS232	2/2	120 kbps	650 mV	0°C ~ 70°C	Active	5140
HIN232ACPZ	Renesas Electronics Corporation	RS232	2/2	230 kbps	500 mV	0°C ~ 70°C	Active	3300
HIN232CPZ	Renesas Electronics Corporation	RS232	2/2	120 kbps	500 mV	0°C ~ 70°C	Active	9431
HIN232ECPZ	Renesas Electronics Corporation	RS232	2/2	230 kbps	500 mV	0°C ~ 70°C	Active	10100
HIN232IPZ	Renesas Electronics Corporation	RS232	2/2	120 kbps	500 mV	-40°C ~ 85°C	Active	10200
LT1081CN#PBF	Analog Devices Inc.	RS232	2/2	250 kbps	400 mV	0°C ~ 70°C	Active	2148
LT1081IN#PBF	Analog Devices Inc.	RS232	2/2	250 kbps	400 mV	-40°C ~ 85°C	Active	948

Engineering Selection Recommendations

All listed substitute parts maintain full electrical and mechanical compatibility with the DS232A+ within the specified parameter ranges. Selection should prioritize active product status over obsolete components.

For applications requiring the extended temperature range of -40°C to 85°C, the following active substitutes are available: ADM232AANZ, ADM232LANZ, HIN232IPZ, and LT1081IN#PBF.

For applications operating within the 0°C to 70°C range, all remaining active substitutes are suitable, with higher inventory availability for MAX232ACPE+, HIN232CPZ, HIN232ECPZ, and HIN232IPZ.

All substitute parts maintain ROHS3 compliance and MSL 1 rating, ensuring regulatory and environmental compatibility with the original DS232A+ specification.

Frequently Asked Questions (FAQ)

Q: Can the DS232A+ be directly replaced with any of these substitute parts?

A: Yes. All listed substitute parts maintain the same RS232 protocol, 2/2 driver/receiver configuration, full-duplex operation, 4.5V to 5.5V supply voltage, and 16-DIP package. Electrical and mechanical compatibility is maintained across all substitutes.

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

A: Both manufacturers provide RS232 transceivers meeting the same electrical specifications. Analog Devices offers the MAX232, ADM232, and LT1081 series. Renesas offers the HIN232 series. All maintain identical protocol, package, and voltage specifications. Selection may depend on supply chain availability and preferred vendor relationships.

Q: Does operating temperature range affect substitution compatibility?

A: Operating temperature range does not prevent substitution. The DS232A+ operates from -40°C to 85°C. Substitute parts are available in both -40°C to 85°C and 0°C to 70°C ranges. Selection should match the intended application environment. Extended temperature range parts are suitable for all applications, while commercial temperature range parts are suitable only for 0°C to 70°C environments.

Q: Are there differences in data rate specifications among the substitutes?

A: Data rates vary from 120 kbps to 350 kbps across the substitute options. The DS232A+ operates at 350 kbps. All substitute parts exceed minimum RS232 requirements. For applications requiring maximum data rate performance, HIN232ACPZ, HIN232ECPZ, and LT1081 series (250 kbps) are recommended. Lower data rate parts (120-200 kbps) remain fully compatible for standard RS232 communication.

Q: What is receiver hysteresis and does it affect substitution?

A: Receiver hysteresis is the voltage difference between rising and falling threshold levels. The DS232A+ specifies 500 mV. Substitutes range from 400 mV to 650 mV. All values remain within RS232 specification tolerances. Hysteresis differences do not prevent substitution but may affect noise immunity in specific applications. Higher hysteresis (650 mV) provides greater noise immunity; lower hysteresis (400 mV) provides faster response.

Q: Is the 16-DIP package critical for substitution?

A: Yes. All substitute parts use the identical 16-DIP (0.300", 7.62mm) through-hole package. Package compatibility is mandatory for direct board-level substitution without redesign.

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