SP3243EBEA-L Equivalent & Substitute Parts

Part Overview

The SP3243EBEA-L is a full-duplex RS232 transceiver IC manufactured by MaxLinear, Inc., configured with 3 drivers and 5 receivers in a 28-SSOP surface mount package. This component operates across a 3V to 5.5V supply range with a 250kbps data rate and is rated for -40°C to 85°C operating temperatures. The part is currently obsolete, necessitating identification of functionally equivalent alternatives from active product lines to maintain design continuity and ensure long-term component availability.

Key Parameters

Parameter	SP3243EBEA-L
Manufacturer	MaxLinear, Inc.
Type	Transceiver
Protocol	RS232
Drivers/Receivers	3/5
Duplex	Full
Data Rate	250kbps
Voltage Supply	3V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package	28-SSOP (0.209", 5.30mm Width)
Mounting Type	Surface Mount
Receiver Hysteresis	300 mV
Product Status	Obsolete
Moisture Sensitivity Level	2 (1 Year)

Substitute Part Grouping Explanation

Substitution eligibility for the SP3243EBEA-L is determined by the following critical parameters:

Core Compatibility Requirements:

Protocol: RS232
Drivers/Receivers: 3/5 configuration
Duplex: Full
Package: 28-SSOP (0.209", 5.30mm Width)
Voltage Supply: 3V ~ 5.5V
Mounting Type: Surface Mount

Performance Parameters:

Data Rate: 250kbps minimum (higher rates are backward compatible)
Operating Temperature: -40°C to 85°C range (or subset thereof)
Receiver Hysteresis: 300 mV to 500 mV range

Substitute parts meeting all core compatibility requirements and operating within the specified performance envelope are classified as direct equivalents. Parts with extended data rate capabilities (1Mbps) or improved receiver hysteresis (500 mV) provide enhanced performance while maintaining full functional compatibility.

Parameter Comparison

Part Number	Manufacturer	Data Rate	Receiver Hysteresis	Operating Temp	Product Status	Packaging	Inventory
SP3243EBEA-L	MaxLinear, Inc.	250kbps	300 mV	-40°C ~ 85°C	Obsolete	-	1218 Pcs
MAX3243EEAI+	Analog Devices Inc./Maxim Integrated	250kbps	500 mV	-40°C ~ 85°C	Active	Tube	2140 Pcs
MAX3243EEAI+T	Analog Devices Inc./Maxim Integrated	250kbps	500 mV	-40°C ~ 85°C	Active	Cut Tape & Digi-Reel	15588 Pcs
MAX3244EEAI+	Analog Devices Inc./Maxim Integrated	250kbps	500 mV	-40°C ~ 85°C	Active	Tube	2200 Pcs
MAX3244EEAI+T	Analog Devices Inc./Maxim Integrated	250kbps	500 mV	-40°C ~ 85°C	Active	-	5100 Pcs
MAX3245EEAI+	Analog Devices Inc./Maxim Integrated	1Mbps	500 mV	-40°C ~ 85°C	Active	Tube	2136 Pcs
MAX3245EEAI+T	Analog Devices Inc./Maxim Integrated	1Mbps	500 mV	-40°C ~ 85°C	Active	Cut Tape & Digi-Reel	17641 Pcs
TRSF3243IDB	Texas Instruments	1Mbps	500 mV	-40°C ~ 85°C	Last Time Buy	Tube	1130 Pcs
ICL3243ECAZ	Renesas Electronics Corporation	250kbps	500 mV	0°C ~ 70°C	Active	Tube	2716 Pcs
ICL3243ECAZ-T	Renesas Electronics Corporation	250kbps	500 mV	0°C ~ 70°C	Active	Tape & Reel	20100 Pcs
ICL3245CAZ	Renesas Electronics Corporation	1Mbps	500 mV	0°C ~ 70°C	Active	Tube	1980 Pcs

Engineering Selection Recommendations

Primary Substitutes (Identical Operating Temperature Range):

The MAX3243EEAI+T and MAX3244EEAI+T from Analog Devices Inc./Maxim Integrated are the preferred substitutes. Both maintain the -40°C to 85°C operating temperature range of the original part, are in active product status with ROHS3 compliance, and feature improved receiver hysteresis (500 mV vs. 300 mV). The MAX3243EEAI+T offers the highest inventory availability (15,588 pcs) in Cut Tape & Digi-Reel packaging, suitable for both manual and automated assembly processes.

Extended Performance Alternatives:

The MAX3245EEAI+T provides enhanced data rate capability (1Mbps vs. 250kbps) while maintaining full backward compatibility with the original -40°C to 85°C temperature specification. This part is active, ROHS3 compliant, and available in high volume (17,641 pcs).

Temperature-Constrained Alternatives:

The ICL3243ECAZ-T from Renesas Electronics operates within a narrower temperature range (0°C to 70°C) and is suitable only for applications not requiring the full -40°C to 85°C envelope. This part is active and available in high volume (20,100 pcs) in Tape & Reel packaging.

End-of-Life Consideration:

The TRSF3243IDB from Texas Instruments is in Last Time Buy status and should be avoided for new designs despite meeting functional requirements.

Frequently Asked Questions (FAQ)

Q: Can MAX3245EEAI+T replace SP3243EBEA-L in existing designs?

A: Yes. The MAX3245EEAI+T is a direct functional substitute. It maintains identical package geometry (28-SSOP), voltage supply range (3V ~ 5.5V), operating temperature range (-40°C ~ 85°C), and driver/receiver configuration (3/5). The 1Mbps data rate exceeds the original 250kbps specification, providing enhanced performance margin.

Q: What is the difference between MAX3243EEAI+ and MAX3243EEAI+T?

A: Both parts are electrically identical. The suffix "+T" indicates Cut Tape & Digi-Reel packaging, optimized for automated pick-and-place assembly. The non-T variant (MAX3243EEAI+) is supplied in Tube packaging, suitable for manual assembly or lower-volume applications.

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

A: Receiver hysteresis is the voltage differential required to switch logic states. The 500 mV specification in substitute parts provides improved noise immunity compared to the original 300 mV, enhancing signal integrity in noisy environments while remaining fully compatible with RS232 protocol requirements.

Q: Are ICL3243ECAZ parts suitable for industrial temperature applications?

A: No. The ICL3243ECAZ operates only within 0°C to 70°C, which does not cover the full -40°C to 85°C range of the original SP3243EBEA-L. Use this part only in applications with narrower temperature requirements.

Q: What packaging options are available for high-volume production?

A: For automated assembly, select parts with "+T" suffix in Cut Tape & Digi-Reel packaging: MAX3243EEAI+T (15,588 pcs available), MAX3244EEAI+T (5,100 pcs available), or MAX3245EEAI+T (17,641 pcs available). For manual assembly, Tube packaging variants are available from multiple manufacturers.

Q: Is the SP3243EBEA-L still available for purchase?

A: The SP3243EBEA-L is obsolete. Current inventory of 1,218 pcs is available but represents end-of-life stock. New designs must transition to active alternatives such as the MAX3243EEAI+T or MAX3245EEAI+T.

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