SP3243EUER-L/TR RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The SP3243EUER-L/TR is a full-duplex RS232 transceiver manufactured by MaxLinear, Inc., designed for serial communication applications requiring 3 drivers and 5 receivers in a compact 32-QFN (5x5) surface mount package. This part operates across a 3V to 5.5V supply range with a 1Mbps data rate and is classified as Active product status with RoHS compliance. Equivalent and substitute parts are identified based on matching functional specifications, package compatibility, and electrical performance parameters within the RS232 transceiver category.

Key Parameters

Parameter	SP3243EUER-L/TR
Manufacturer	MaxLinear, Inc.
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	3/5
Duplex	Full
Package / Case	32-VFQFN Exposed Pad
Supplier Device Package	32-QFN (5x5)
Voltage - Supply	3V ~ 5.5V
Data Rate	1Mbps
Operating Temperature	0°C ~ 70°C
Mounting Type	Surface Mount
RoHS Status	RoHS Compliant
MSL Rating	2 (1 Year)

Substitute Part Grouping Explanation

Substitute parts for the SP3243EUER-L/TR are qualified based on the following criteria:

Functional Equivalence: All substitute parts maintain the same RS232 protocol, 3/5 driver/receiver configuration, and full-duplex operation.

Package Compatibility: All substitutes use the 32-QFN (5x5) package format with exposed pad, ensuring mechanical and electrical pin compatibility.

Electrical Parameters: Substitutes are grouped by supply voltage range and operating temperature specifications. Parts with overlapping or extended voltage and temperature ranges are considered compatible for applications within the main part's operating envelope.

Key Qualifying Parameters:

Protocol: RS232
Driver/Receiver Count: 3/5
Package: 32-QFN (5x5) with exposed pad
Duplex Mode: Full
Mounting: Surface Mount

Parameter Comparison

Parameter	SP3243EUER-L/TR	ISL3243EIRZ	ISL3243EIRZ-T	MAX3243ECRHBR	MAX3243EIRHBR	TRS3243ECRHBR
Manufacturer	MaxLinear, Inc.	Renesas Electronics	Renesas Electronics	Texas Instruments	Texas Instruments	Texas Instruments
Protocol	RS232	RS232	RS232	RS232	RS232	RS232
Drivers/Receivers	3/5	3/5	3/5	3/5	3/5	3/5
Duplex	Full	Full	Full	Full	Full	Full
Package	32-VFQFN Exposed Pad	32-VFQFN Exposed Pad	32-VFQFN Exposed Pad	32-VFQFN Exposed Pad	32-VFQFN Exposed Pad	32-VFQFN Exposed Pad
Voltage - Supply	3V ~ 5.5V	2.7V ~ 3.6V	2.7V ~ 3.6V	3V ~ 5.5V	3V ~ 5.5V	3V ~ 5.5V
Data Rate	1Mbps	250kbps	250kbps	500kbps	500kbps	500kbps
Operating Temperature	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C	0°C ~ 70°C
Receiver Hysteresis	300 mV	500 mV	500 mV	500 mV	500 mV	500 mV
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	2 (1 Year)	2 (1 Year)	2 (1 Year)	2 (1 Year)	2 (1 Year)	2 (1 Year)

Engineering Selection Recommendations

Direct Substitutes (Matching Supply Voltage and Temperature Range):

MAX3243ECRHBR and TRS3243ECRHBR are direct substitutes for applications operating within 3V to 5.5V supply and 0°C to 70°C temperature range. Both parts maintain identical electrical operating parameters and are ROHS3 compliant with equivalent MSL ratings.

MAX3243EIRHBR extends the operating temperature range to -40°C to 85°C while maintaining the same 3V to 5.5V supply voltage, making it suitable for applications requiring wider temperature operation.

Limited Substitutes (Restricted Supply Voltage Range):

ISL3243EIRZ and ISL3243EIRZ-T operate within a narrower supply voltage range of 2.7V to 3.6V and are not suitable for applications requiring the full 3V to 5.5V range of the SP3243EUER-L/TR. These parts are qualified only for 3.3V single-supply applications.

Compliance Status:

All substitute parts maintain ROHS3 compliance and equivalent moisture sensitivity levels, ensuring compatibility with current manufacturing and environmental standards.

Frequently Asked Questions (FAQ)

Q: Can ISL3243EIRZ or ISL3243EIRZ-T be used as direct replacements for SP3243EUER-L/TR?

A: No. The ISL3243 series operates at 2.7V to 3.6V supply voltage, which does not cover the full 3V to 5.5V range of the SP3243EUER-L/TR. These parts are suitable only for 3.3V applications and cannot be used in systems requiring 5V operation.

Q: What is the difference between MAX3243ECRHBR and MAX3243EIRHBR?

A: Both parts share identical electrical specifications and supply voltage range (3V to 5.5V). The primary difference is operating temperature: MAX3243ECRHBR operates 0°C to 70°C, while MAX3243EIRHBR extends to -40°C to 85°C. Select MAX3243EIRHBR for applications requiring extended temperature operation.

Q: Are packaging differences between substitute parts significant?

A: All substitute parts use the 32-QFN (5x5) package with exposed pad, ensuring pin-for-pin compatibility. Packaging format (Tape & Reel, Tube, or Cut Tape) affects supply and handling but not electrical or mechanical compatibility.

Q: What does the 300 mV receiver hysteresis of SP3243EUER-L/TR mean compared to 500 mV in substitutes?

A: Receiver hysteresis defines the voltage difference between rising and falling threshold levels. The SP3243EUER-L/TR has tighter hysteresis (300 mV) compared to substitutes (500 mV), which may affect noise immunity in specific applications. Verify application requirements before substitution.

Q: Can I use a substitute with lower data rate than the original part?

A: Data rate specifications indicate maximum supported speeds. A substitute with lower rated data rate (ISL3243 at 250kbps versus SP3243EUER-L/TR at 1Mbps) can operate at lower speeds but may not support higher-speed applications. Confirm application data rate requirements before selection.

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