ICL3232EIA-T RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The ICL3232EIA-T is a full-duplex RS232 transceiver manufactured by Renesas Electronics Corporation, configured as a 2/2 driver/receiver in a 16-SSOP surface mount package. This component is classified as obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support legacy system maintenance where the original part is no longer in production.

Key Parameters

Parameter	Value
Manufacturer Part Number	ICL3232EIA-T
Manufacturer	Renesas Electronics Corporation
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	2/2
Duplex	Full
Receiver Hysteresis	500 mV
Data Rate	250 kbps
Voltage - Supply	3V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	16-SSOP (0.209", 5.30mm Width)
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the ICL3232EIA-T is determined by the following critical parameters:

Primary Substitution Criteria:

Protocol: RS232 full-duplex transceiver
Number of Drivers/Receivers: 2/2 configuration
Voltage Supply Range: 3V ~ 5.5V
Data Rate: 250 kbps minimum
Receiver Hysteresis: 500 mV
Operating Temperature Range: -40°C ~ 85°C
Package Type: 16-SSOP or compatible surface mount package

Substitution Categories:

Parametric Equivalents maintain identical electrical specifications and package footprint, differing only in product status (Active vs. Obsolete) and compliance certifications:

ICL3232EIAZ-T (Renesas, Active status, ROHS3 compliant)

Similar Substitutes maintain the 2/2 driver/receiver configuration and RS232 protocol but may have minor variations in receiver hysteresis (300 mV vs. 500 mV), data rate (235 kbps vs. 250 kbps), or operating temperature range (0°C ~ 70°C vs. -40°C ~ 85°C). These parts are functionally compatible for most applications but require verification of specific operating conditions:

MAX3232CAE+ (Analog Devices/Maxim, Tube packaging)
MAX3232CAE+T (Analog Devices/Maxim)
MAX3232CDBR (Texas Instruments, Cut Tape packaging)
MAX3232CPWR (Texas Instruments, 16-TSSOP package, Active status)

Single-Channel Alternatives (ICL3221EIAZ-T, ICL3221EIAZ-T7A, ICL3226EIAZ-T, ICL3226IAZ-T) provide 1/1 driver/receiver configuration and are suitable only for applications requiring reduced channel count.

Parameter Comparison

Part Number	Manufacturer	Drivers/Receivers	Data Rate	Receiver Hysteresis	Operating Temp	Package	Product Status	RoHS Status
ICL3232EIA-T	Renesas	2/2	250 kbps	500 mV	-40°C ~ 85°C	16-SSOP	Obsolete	Non-compliant
ICL3232EIAZ-T	Renesas	2/2	250 kbps	500 mV	-40°C ~ 85°C	16-SSOP	Active	ROHS3 Compliant
MAX3232CAE+	Analog Devices/Maxim	2/2	235 kbps	300 mV	0°C ~ 70°C	16-SSOP	Active	ROHS3 Compliant
MAX3232CAE+T	Analog Devices/Maxim	2/2	235 kbps	300 mV	0°C ~ 70°C	16-SSOP	Active	ROHS3 Compliant
MAX3232CDBR	Texas Instruments	2/2	250 kbps	300 mV	0°C ~ 70°C	16-SSOP	Active	ROHS3 Compliant
MAX3232CPWR	Texas Instruments	2/2	250 kbps	300 mV	0°C ~ 70°C	16-TSSOP	Active	ROHS3 Compliant

Engineering Selection Recommendations

First Priority: ICL3232EIAZ-T

The ICL3232EIAZ-T is the direct parametric equivalent to the ICL3232EIA-T. It maintains identical electrical specifications (2/2 configuration, 250 kbps data rate, 500 mV receiver hysteresis, -40°C ~ 85°C operating range) and identical 16-SSOP package footprint. The primary advantage is active product status with ROHS3 compliance, ensuring long-term supply availability and regulatory alignment. This part is the recommended first choice for direct replacement in legacy designs.

Secondary Priority: MAX3232CDBR or MAX3232CPWR

These Texas Instruments parts maintain the 2/2 driver/receiver configuration and 250 kbps data rate. Both are active products with ROHS3 compliance. Differences include reduced receiver hysteresis (300 mV vs. 500 mV) and narrower operating temperature range (0°C ~ 70°C vs. -40°C ~ 85°C). Selection between these two depends on package requirement: MAX3232CDBR uses 16-SSOP (direct footprint match), while MAX3232CPWR uses 16-TSSOP (requires PCB layout adjustment). These parts are suitable for applications operating within the 0°C ~ 70°C temperature window.

Tertiary Priority: MAX3232CAE+ or MAX3232CAE+T

These Analog Devices/Maxim parts provide 2/2 configuration with active status and ROHS3 compliance. Data rate is specified at 235 kbps (slightly lower than 250 kbps) and receiver hysteresis is 300 mV. Operating temperature range is 0°C ~ 70°C. These parts are suitable for standard industrial temperature applications but not for extended temperature requirements.

Not Recommended for Direct Substitution: Single-Channel Parts (ICL3221, ICL3226 series)

These parts reduce the driver/receiver count to 1/1, fundamentally altering circuit functionality. Use only if application redesign to single-channel operation is acceptable.

Frequently Asked Questions (FAQ)

Q: Can ICL3232EIAZ-T directly replace ICL3232EIA-T without PCB modification?

A: Yes. The ICL3232EIAZ-T is a parametric equivalent with identical 16-SSOP package footprint, pin configuration, and electrical specifications. No PCB layout changes are required.

Q: What is the difference between ICL3232EIA-T and ICL3232EIAZ-T?

A: The primary differences are product status (Obsolete vs. Active) and RoHS compliance (Non-compliant vs. ROHS3 Compliant). Electrical specifications and package are identical.

Q: Can MAX3232CPWR replace ICL3232EIA-T?

A: MAX3232CPWR maintains the 2/2 driver/receiver configuration and 250 kbps data rate but uses a 16-TSSOP package instead of 16-SSOP. This requires PCB layout modification. Additionally, the operating temperature range is narrower (0°C ~ 70°C vs. -40°C ~ 85°C) and receiver hysteresis is reduced (300 mV vs. 500 mV). Substitution is possible only if these differences are acceptable for the application.

Q: Why do some substitutes have 300 mV receiver hysteresis instead of 500 mV?

A: Receiver hysteresis is a design parameter that affects noise immunity and switching threshold. The 300 mV specification in MAX3232 variants is a design choice by Analog Devices and Texas Instruments. For applications sensitive to noise margins, the 500 mV hysteresis of the ICL3232 series may be preferred.

Q: What is the difference between 16-SSOP and 16-TSSOP packages?

A: Both are 16-pin surface mount packages with different body widths. 16-SSOP has a 5.30mm width, while 16-TSSOP has a 4.40mm width. They are not pin-compatible and require different PCB footprints. Verify package compatibility before substitution.

Q: Are all substitute parts ROHS3 compliant?

A: All active substitute parts listed (ICL3232EIAZ-T, MAX3232 series) are ROHS3 compliant. The original ICL3232EIA-T is RoHS non-compliant due to its obsolete status.

Q: Can I use a single-channel part (ICL3221 or ICL3226) if I only need one channel?

A: Single-channel parts reduce the driver/receiver count to 1/1. They are suitable only if your application requires only one channel and circuit redesign is acceptable. These are not direct substitutes for the 2/2 configuration.

Q: What is the inventory status of substitute parts?

A: ICL3232EIAZ-T has 30,100 units in stock. MAX3232CPWR has 25,200 units. MAX3232CDBR has 10,400 units. All substitute parts listed have active inventory availability.

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