SP3243EHCA-L/TR RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The SP3243EHCA-L/TR is an active RS232 interface transceiver manufactured by MaxLinear, Inc., configured as a 3/5 full-duplex transceiver in a 28-SSOP surface mount package. This component operates across 3V to 5.5V supply voltage with a maximum data rate of 460 Kbps and is designed for applications requiring RS232 serial communication with integrated driver and receiver functionality. The part maintains active product status with RoHS compliance and is currently in stock inventory.

Equivalent and substitute parts are identified based on matching electrical specifications, mechanical compatibility, and functional equivalence within the RS232 transceiver category. Substitutes are selected where core parameters—supply voltage range, duplex configuration, driver/receiver count, package type, and mounting method—remain compatible with the original design requirements.

Key Parameters

Parameter	SP3243EHCA-L/TR
Manufacturer	MaxLinear, Inc.
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	3/5
Duplex	Full
Voltage - Supply	3V ~ 5.5V
Data Rate	460 Kbps
Receiver Hysteresis	300 mV
Operating Temperature	0°C ~ 70°C
Package / Case	28-SSOP (0.209", 5.30mm Width)
Mounting Type	Surface Mount
Packaging	Tape & Reel (TR)
RoHS Status	RoHS Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the SP3243EHCA-L/TR are grouped based on the following substitution criteria:

Primary Compatibility Parameters:

RS232 protocol with 3/5 driver/receiver configuration
Full-duplex operation
Supply voltage range: 3V ~ 5.5V
Surface mount technology
28-pin package format (SSOP or TSSOP variants)
RoHS compliance status

Substitution Categories:

Upgrade Parts (Extended Temperature Range): ICL3243EIAZ, ICL3243EIAZ-T, ICL3244EIAZ, ICL3244EIAZ-T provide -40°C to 85°C operating temperature, exceeding the original 0°C to 70°C range. These parts maintain identical electrical specifications and package compatibility while offering enhanced thermal performance.

Manufacturer Recommended Parts (Matched Temperature Range): ICL3243ECAZ, ICL3243ECAZ-T, ICL3243ECVZ, ICL3243ECVZ-T, ICL3243EIVZ, ICL3243EIVZ-T maintain the 0°C to 70°C operating temperature matching the original part. These include both 28-SSOP and 28-TSSOP package variants, with TSSOP options providing reduced package width (0.173" vs 0.209").

Package Variants: SSOP and TSSOP package options are available within the same electrical specification set, allowing for board layout optimization while maintaining functional equivalence.

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Supply Voltage	Data Rate	Receiver Hysteresis	Operating Temperature	Package	Packaging Type	RoHS Status
SP3243EHCA-L/TR	MaxLinear, Inc.	RS232	3/5	3V ~ 5.5V	460 Kbps	300 mV	0°C ~ 70°C	28-SSOP	Tape & Reel	RoHS Compliant
ICL3243EIAZ	Renesas Electronics	RS232	3/5	3V ~ 5.5V	250 Kbps	500 mV	-40°C ~ 85°C	28-SSOP	Tube	ROHS3 Compliant
ICL3243EIAZ-T	Renesas Electronics	RS232	3/5	3V ~ 5.5V	250 Kbps	500 mV	-40°C ~ 85°C	28-SSOP	Cut Tape & Digi-Reel	ROHS3 Compliant
ICL3244EIAZ	Renesas Electronics	RS232	3/5	3V ~ 5.5V	250 Kbps	500 mV	-40°C ~ 85°C	28-SSOP	Tube	ROHS3 Compliant
ICL3244EIAZ-T	Renesas Electronics	RS232	3/5	3V ~ 5.5V	250 Kbps	500 mV	-40°C ~ 85°C	28-SSOP	Cut Tape & Digi-Reel	ROHS3 Compliant
ICL3243ECAZ	Renesas Electronics	RS232	3/5	3V ~ 5.5V	250 Kbps	500 mV	0°C ~ 70°C	28-SSOP	Tube	ROHS3 Compliant
ICL3243ECAZ-T	Renesas Electronics	RS232	3/5	3V ~ 5.5V	250 Kbps	500 mV	0°C ~ 70°C	28-SSOP	Tape & Reel	ROHS3 Compliant
ICL3243ECVZ	Renesas Electronics	RS232	3/5	3V ~ 5.5V	250 Kbps	500 mV	0°C ~ 70°C	28-TSSOP	Tube	ROHS3 Compliant
ICL3243ECVZ-T	Renesas Electronics	RS232	3/5	3V ~ 5.5V	250 Kbps	500 mV	0°C ~ 70°C	28-TSSOP	Cut Tape & Digi-Reel	ROHS3 Compliant
ICL3243EIVZ	Renesas Electronics	RS232	3/5	3V ~ 5.5V	250 Kbps	500 mV	-40°C ~ 85°C	28-TSSOP	Tube	ROHS3 Compliant
ICL3243EIVZ-T	Renesas Electronics	RS232	3/5	3V ~ 5.5V	250 Kbps	500 mV	-40°C ~ 85°C	28-TSSOP	Cut Tape & Digi-Reel	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Matched Temperature Range): ICL3243ECAZ-T is the primary equivalent for the SP3243EHCA-L/TR, maintaining identical operating temperature range (0°C ~ 70°C) and offering Tape & Reel packaging matching the original specification. Both parts are active products with ROHS3 compliance and equivalent MSL ratings.

For Extended Temperature Applications: ICL3243EIAZ-T or ICL3244EIAZ-T provide -40°C to 85°C operating range with Cut Tape & Digi-Reel packaging. These parts are suitable for applications requiring enhanced thermal performance beyond the original 0°C to 70°C specification.

For Compact Board Layouts: ICL3243ECVZ-T and ICL3243EIVZ-T offer 28-TSSOP packaging (0.173" width) compared to the standard 28-SSOP (0.209" width), enabling reduced footprint while maintaining electrical equivalence. Temperature range selection follows the same criteria as SSOP variants.

Compliance Considerations: All substitute parts maintain RoHS compliance status (ROHS3 designation) and MSL ratings compatible with standard manufacturing processes. Packaging format selection (Tube, Tape & Reel, or Cut Tape & Digi-Reel) should align with production assembly requirements and inventory management protocols.

Frequently Asked Questions (FAQ)

Q: Can ICL3243EIAZ-T replace SP3243EHCA-L/TR in all applications? A: ICL3243EIAZ-T is electrically compatible and maintains the same supply voltage range, driver/receiver configuration, and RS232 protocol. The extended operating temperature range (-40°C to 85°C) exceeds the original specification (0°C to 70°C), making it suitable for applications within the original temperature window. Packaging format differs (Cut Tape & Digi-Reel vs. Tape & Reel), which may affect procurement and assembly processes.

Q: What is the difference between 28-SSOP and 28-TSSOP packages? A: Both packages contain 28 pins in surface mount configuration. The primary difference is package width: 28-SSOP measures 0.209" (5.30mm) while 28-TSSOP measures 0.173" (4.40mm). The TSSOP variant provides a more compact footprint suitable for space-constrained board layouts. Electrical functionality and pin assignments remain equivalent.

Q: Are there data rate differences between the original part and substitutes? A: The SP3243EHCA-L/TR specifies 460 Kbps maximum data rate, while Renesas ICL3243 and ICL3244 series parts specify 250 Kbps. Both rates exceed typical RS232 application requirements. The original part's higher data rate specification does not preclude use of lower-rated substitutes in standard RS232 applications operating below 250 Kbps.

Q: What does receiver hysteresis difference mean for substitution? A: The original part specifies 300 mV receiver hysteresis while substitutes specify 500 mV. Higher hysteresis provides greater noise immunity but may reduce sensitivity to weak input signals. Selection depends on signal integrity requirements in the target application environment.

Q: Which packaging option should I select for production? A: Tape & Reel (TR) packaging is optimized for automated assembly processes. Cut Tape & Digi-Reel offers flexibility for mixed-volume production. Tube packaging is suitable for manual assembly or low-volume applications. Selection should align with your manufacturing process and inventory management requirements.

Q: Are all substitute parts currently in stock? A: Inventory availability varies by part number and packaging format. ICL3243ECAZ-T and ICL3243EIAZ-T maintain the highest stock levels (20,100 and 20,200 units respectively), while other variants have lower availability. Verify current inventory status with your supplier before finalizing design selection.

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