SP3243EEY-L RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The SP3243EEY-L is a full-duplex RS232 transceiver manufactured by MaxLinear, Inc., designed for 3/5 driver/receiver configurations in surface-mount 28-TSSOP packaging. This interface IC operates across 3V to 5.5V supply voltage with a 120 Kbps data rate and 300 mV receiver hysteresis. The part is currently in active product status with 1490 units in stock.

Equivalent and substitute parts are necessary when the original SP3243EEY-L becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when design requirements necessitate different operating temperature ranges or data rate specifications while maintaining functional compatibility within the RS232 transceiver category.

Key Parameters

Parameter	SP3243EEY-L
Manufacturer	MaxLinear, Inc.
Type	Transceiver
Protocol	RS232
Drivers/Receivers	3/5
Duplex	Full
Package/Case	28-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Voltage Supply	3V ~ 5.5V
Data Rate	120 Kbps
Receiver Hysteresis	300 mV
Operating Temperature	-40°C ~ 85°C
RoHS Status	RoHS Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility for the SP3243EEY-L is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Protocol: RS232
Drivers/Receivers: 3/5 configuration
Duplex: Full
Package/Case: 28-TSSOP (0.173", 4.40mm Width)
Mounting Type: Surface Mount
Voltage Supply Range: 3V ~ 5.5V

Allowable Variation Parameters:

Data Rate: Substitute parts may exceed 120 Kbps (250 Kbps, 500 Kbps acceptable)
Receiver Hysteresis: Substitute parts may differ (300 mV, 500 mV acceptable)
Operating Temperature: Substitute parts may have narrower ranges (0°C ~ 70°C) or extended ranges (-40°C ~ 85°C)
Packaging Format: Tube, Cut Tape (CT) & Digi-Reel®, or Tape & Reel (TR)
RoHS Status: RoHS Compliant or ROHS3 Compliant acceptable

All substitute parts listed maintain active or current product status with documented inventory availability.

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Data Rate	Receiver Hysteresis	Operating Temp	Packaging	Product Status	Inventory
SP3243EEY-L	MaxLinear, Inc.	RS232	3/5	120 Kbps	300 mV	-40°C ~ 85°C	Surface Mount 28-TSSOP	Active	1490 Pcs
ICL3243ECVZ	Renesas Electronics	RS232	3/5	250 Kbps	500 mV	0°C ~ 70°C	Tube 28-TSSOP	Active	1859 Pcs
ICL3243ECVZ-T	Renesas Electronics	RS232	3/5	250 Kbps	500 mV	0°C ~ 70°C	Cut Tape (CT) & Digi-Reel® 28-TSSOP	Active	7514 Pcs
ICL3243EIVZ	Renesas Electronics	RS232	3/5	250 Kbps	500 mV	-40°C ~ 85°C	Tube 28-TSSOP	Active	9919 Pcs
ICL3243EIVZ-T	Renesas Electronics	RS232	3/5	250 Kbps	500 mV	-40°C ~ 85°C	Cut Tape (CT) & Digi-Reel® 28-TSSOP	Active	1464 Pcs
ICL3243EIVZ-T7A	Renesas Electronics	RS232	3/5	250 Kbps	500 mV	-40°C ~ 85°C	Tape & Reel (TR) 28-TSSOP	Active	908 Pcs
MAX3243CPW	Texas Instruments	RS232	3/5	250 Kbps	500 mV	0°C ~ 70°C	Tube 28-TSSOP	Obsolete	2118 Pcs
MAX3243CPWR	Texas Instruments	RS232	3/5	250 Kbps	500 mV	0°C ~ 70°C	Cut Tape (CT) & Digi-Reel® 28-TSSOP	Active	45100 Pcs
MAX3243CUI+	Analog Devices Inc./Maxim Integrated	RS232	3/5	120 Kbps	300 mV	0°C ~ 70°C	Tube 28-TSSOP	Active	25200 Pcs
MAX3243ECPW	Texas Instruments	RS232	3/5	500 Kbps	500 mV	0°C ~ 70°C	Tube 28-TSSOP	Obsolete	2200 Pcs
MAX3243ECPWR	Texas Instruments	RS232	3/5	500 Kbps	500 mV	0°C ~ 70°C	Cut Tape (CT) & Digi-Reel® 28-TSSOP	Active	27600 Pcs

Engineering Selection Recommendations

Primary Substitutes (Active Status, Extended Temperature Range):

ICL3243EIVZ, ICL3243EIVZ-T, and ICL3243EIVZ-T7A from Renesas Electronics are direct functional equivalents with active product status and operating temperature range of -40°C to 85°C, matching the SP3243EEY-L thermal specification. These parts support higher data rates (250 Kbps) and are available in multiple packaging formats. All three variants maintain ROHS3 compliance and REACH unaffected status.

Secondary Substitutes (Active Status, Commercial Temperature Range):

MAX3243CPWR (Texas Instruments) and MAX3243CUI+ (Analog Devices Inc./Maxim Integrated) are active products with 28-TSSOP packaging and full RS232 3/5 transceiver functionality. MAX3243CUI+ maintains identical receiver hysteresis (300 mV) and data rate (120 Kbps) specifications as the SP3243EEY-L but operates within 0°C to 70°C temperature range. MAX3243CPWR supports 250 Kbps data rate with 500 mV hysteresis and commercial temperature range.

High Data Rate Alternative:

MAX3243ECPWR (Texas Instruments) provides 500 Kbps data rate capability with active product status and extensive inventory (27600 units). This part is suitable for applications requiring higher bandwidth within the commercial temperature range (0°C to 70°C).

Avoid:

MAX3243CPW and MAX3243ECPW are marked obsolete and should not be selected for new designs despite current inventory availability.

Frequently Asked Questions (FAQ)

Q: Can ICL3243ECVZ replace SP3243EEY-L in all applications?

A: ICL3243ECVZ maintains protocol, driver/receiver configuration, duplex mode, and package equivalence. However, it operates within 0°C to 70°C temperature range compared to SP3243EEY-L's -40°C to 85°C range. Substitution is valid only for applications within the 0°C to 70°C operating window. The part also features 500 mV receiver hysteresis versus 300 mV on the original.

Q: What is the difference between ICL3243ECVZ and ICL3243EIVZ?

A: Both are Renesas Electronics RS232 3/5 transceivers in 28-TSSOP packaging with identical electrical specifications (250 Kbps data rate, 500 mV hysteresis, 3V to 5.5V supply). The primary difference is operating temperature: ICL3243ECVZ operates 0°C to 70°C (commercial), while ICL3243EIVZ operates -40°C to 85°C (industrial). Select ICL3243EIVZ for extended temperature applications.

Q: Why do packaging variants exist for the same part number?

A: Packaging variants (Tube, Cut Tape & Digi-Reel, Tape & Reel) accommodate different manufacturing and assembly processes. Tube packaging suits lower-volume manual assembly. Cut Tape & Digi-Reel format supports semi-automated pick-and-place equipment. Tape & Reel format is optimized for high-volume automated assembly lines. Electrical specifications remain identical across all packaging variants of the same base part number.

Q: Is MAX3243ECPWR suitable as a direct replacement for SP3243EEY-L?

A: MAX3243ECPWR is functionally compatible as a full RS232 3/5 transceiver in 28-TSSOP surface-mount packaging with 3V to 5.5V supply voltage. However, it operates at 500 Kbps data rate (versus 120 Kbps) and within 0°C to 70°C temperature range. Substitution is valid for applications not requiring extended low-temperature operation below 0°C or high-temperature operation above 70°C.

Q: What does RoHS and ROHS3 compliance mean for substitution?

A: RoHS Compliant (SP3243EEY-L) and ROHS3 Compliant (substitute parts) both indicate restriction of hazardous substances in accordance with EU directives. ROHS3 represents the current standard. Both compliance levels are acceptable for substitution purposes in regulated applications.

Q: Can I use MAX3243CUI+ as a drop-in replacement?

A: MAX3243CUI+ maintains identical receiver hysteresis (300 mV) and data rate (120 Kbps) as SP3243EEY-L with full RS232 3/5 transceiver functionality in 28-TSSOP packaging. The primary limitation is operating temperature range of 0°C to 70°C. Substitution is valid for commercial temperature applications. Packaging is Tube format.

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