ICL3243ECVZA-T RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The ICL3243ECVZA-T is a full-duplex RS232 transceiver manufactured by Renesas Electronics Corporation, featuring 3 drivers and 5 receivers in a 28-TSSOP surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The device operates across 3V to 5.5V supply voltage with a 250 kbps data rate and 500 mV receiver hysteresis, suitable for legacy RS232 communication applications requiring full-duplex operation.

Key Parameters

Parameter	Value
Manufacturer Part Number	ICL3243ECVZA-T
Manufacturer	Renesas Electronics Corporation
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	3/5
Duplex	Full
Data Rate	250 kbps
Voltage - Supply	3V ~ 5.5V
Receiver Hysteresis	500 mV
Operating Temperature	0°C ~ 70°C
Package / Case	28-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the ICL3243ECVZA-T are classified based on strict parametric equivalence and functional compatibility. The primary substitution criteria are:

Critical Parameters for Substitution:

Protocol: RS232
Number of Drivers/Receivers: 3/5
Duplex: Full
Package / Case: 28-TSSOP
Voltage - Supply: 3V ~ 5.5V
Mounting Type: Surface Mount

Substitution Categories:

Parametric Equivalent: ICL3243ECVZ-T (Renesas Electronics Corporation) maintains identical electrical specifications and packaging, differing only in product status (Active vs. Obsolete) and packaging format (Cut Tape & Digi-Reel vs. standard).

Direct Manufacturer Equivalents: MAX3243ECPW, MAX3243ECPWR, TRS3243ECPW, and TRS3243ECPWR meet all critical parameters with identical 3/5 driver/receiver configuration, RS232 protocol, full-duplex operation, and 28-TSSOP packaging. These parts operate at 500 kbps data rate (higher than the original 250 kbps) and feature improved MSL ratings (1 vs. 3).

Upgrade Options: MAX3243EIPW, MAX3243EIPWR, SP3243EEY-L, SP3243EEY-L/TR, and TRS3243EIPWR provide extended operating temperature ranges (-40°C ~ 85°C vs. 0°C ~ 70°C) while maintaining all other critical parameters. These parts support broader industrial and automotive temperature requirements.

Parameter Comparison

Part Number	Manufacturer	Drivers/Receivers	Data Rate	Operating Temp	Package	MSL	Product Status	Packaging Format
ICL3243ECVZA-T	Renesas	3/5	250 kbps	0°C ~ 70°C	28-TSSOP	3	Obsolete	Standard
ICL3243ECVZ-T	Renesas	3/5	250 kbps	0°C ~ 70°C	28-TSSOP	3	Active	Cut Tape & Digi-Reel
MAX3243ECPW	Texas Instruments	3/5	500 kbps	0°C ~ 70°C	28-TSSOP	1	Obsolete	Tube
MAX3243ECPWR	Texas Instruments	3/5	500 kbps	0°C ~ 70°C	28-TSSOP	1	Active	Cut Tape & Digi-Reel
TRS3243ECPW	Texas Instruments	3/5	500 kbps	0°C ~ 70°C	28-TSSOP	1	Last Time Buy	Tube
TRS3243ECPWR	Texas Instruments	3/5	500 kbps	0°C ~ 70°C	28-TSSOP	1	Active	Tape & Reel
MAX3243EIPW	Texas Instruments	3/5	500 kbps	-40°C ~ 85°C	28-TSSOP	1	Obsolete	Tube
MAX3243EIPWR	Texas Instruments	3/5	500 kbps	-40°C ~ 85°C	28-TSSOP	1	Active	Cut Tape & Digi-Reel
SP3243EEY-L	MaxLinear, Inc.	3/5	120 kbps	-40°C ~ 85°C	28-TSSOP	1	Active	Standard
SP3243EEY-L/TR	MaxLinear, Inc.	3/5	120 kbps	-40°C ~ 85°C	28-TSSOP	1	Active	Tape & Reel
TRS3243EIPWR	Texas Instruments	3/5	500 kbps	-40°C ~ 85°C	28-TSSOP	1	Active	Cut Tape & Digi-Reel

Engineering Selection Recommendations

For Direct Replacement (Same Operating Temperature Range):

Select ICL3243ECVZ-T as the primary equivalent. This Renesas part maintains identical electrical specifications and is currently in Active product status with improved packaging availability through Cut Tape & Digi-Reel format.

For Texas Instruments alternatives at the same 0°C ~ 70°C operating range, MAX3243ECPWR is the recommended choice due to Active product status and highest inventory availability (27,600 units). TRS3243ECPWR provides an alternative from the same manufacturer with equivalent specifications and Active status.

For Extended Temperature Applications:

When designs require operation across -40°C ~ 85°C, select MAX3243EIPWR or TRS3243EIPWR. Both parts maintain all critical RS232 transceiver parameters while supporting industrial and automotive temperature ranges. MAX3243EIPWR offers the highest inventory (45,200 units) among extended-temperature options.

SP3243EEY-L/TR (MaxLinear) provides extended temperature capability with Active status and Tape & Reel packaging, though data rate is limited to 120 kbps compared to 250 kbps of the original part.

Compliance and Certification:

All substitute parts listed maintain ROHS3 compliance and REACH Unaffected status, matching the original ICL3243ECVZA-T regulatory requirements. MSL ratings for Texas Instruments and MaxLinear parts (MSL 1) provide superior moisture handling compared to the original Renesas part (MSL 3).

Frequently Asked Questions (FAQ)

Q: Can I use MAX3243ECPWR as a direct replacement for ICL3243ECVZA-T?

A: Yes. MAX3243ECPWR meets all critical substitution parameters: 3/5 driver/receiver configuration, RS232 protocol, full-duplex operation, 28-TSSOP package, and 3V ~ 5.5V supply voltage. The higher 500 kbps data rate is backward compatible with applications designed for 250 kbps. Verify PCB layout compatibility with the specific packaging format (Cut Tape & Digi-Reel).

Q: What is the difference between ICL3243ECVZ-T and ICL3243ECVZA-T?

A: Both parts are parametrically identical Renesas RS232 transceivers with 3/5 driver/receiver configuration and 28-TSSOP packaging. The primary difference is product status: ICL3243ECVZA-T is Obsolete, while ICL3243ECVZ-T is Active. Packaging format also differs: ICL3243ECVZ-T is supplied in Cut Tape & Digi-Reel format, providing better availability for production environments.

Q: Should I select an upgrade part with extended temperature range?

A: Extended temperature parts (MAX3243EIPWR, TRS3243EIPWR) are appropriate only if your application requires operation beyond 0°C ~ 70°C. If your design operates within the original temperature specification, standard-range parts provide equivalent functionality at lower cost. Verify thermal requirements before selecting upgrade options.

Q: What packaging formats are available, and does it matter for my application?

A: Substitute parts are available in Tube, Cut Tape & Digi-Reel, Tape & Reel, and Standard formats. For high-volume production, Cut Tape & Digi-Reel and Tape & Reel formats optimize handling and reduce waste. Tube packaging is suitable for lower-volume applications. Verify your assembly equipment compatibility with the selected packaging format.

Q: Are there any data rate limitations when substituting parts?

A: The original ICL3243ECVZA-T operates at 250 kbps. Most substitute parts (MAX3243 and TRS3243 series) support 500 kbps, which is backward compatible. SP3243EEY-L/TR operates at 120 kbps, which is lower than the original specification and suitable only for applications with reduced bandwidth requirements. Verify your communication protocol requirements before selecting SP3243 variants.

Q: What is the MSL rating difference, and does it affect my design?

A: The original part has MSL 3 (168 hours), while most substitutes have MSL 1 (Unlimited). MSL rating indicates moisture sensitivity during storage and handling. Lower MSL ratings (MSL 1) provide superior protection against moisture absorption and are preferred for long-term inventory management and reliability in humid environments.

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