SP3243EBCT-L RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The SP3243EBCT-L is a full-duplex RS232 transceiver manufactured by MaxLinear, Inc., featuring 3 drivers and 5 receivers in a 28-SOIC surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring RS232 interface functionality.

Key Parameters

Parameter	SP3243EBCT-L
Manufacturer	MaxLinear, Inc.
Type	Transceiver
Protocol	RS232
Drivers/Receivers	3/5
Duplex	Full
Receiver Hysteresis	300 mV
Data Rate	250 kbps
Supply Voltage	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package	28-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
MSL Rating	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution for the SP3243EBCT-L is determined by strict equivalence in the following parameters:

Protocol: RS232
Drivers/Receivers: 3/5 configuration
Duplex: Full
Supply Voltage: 3V ~ 5.5V
Package: 28-SOIC
Mounting Type: Surface Mount

Substitute parts are grouped into two categories based on operational temperature range and product status:

Direct Equivalents (Same Operating Temperature Range): Parts maintaining the 0°C ~ 70°C operating temperature range with identical electrical specifications.

Extended Temperature Upgrades: Parts with expanded operating temperature range (-40°C ~ 85°C) and enhanced reliability ratings, suitable for applications requiring broader thermal performance.

Manufacturer-Recommended Alternatives: Parts from alternative manufacturers meeting the same functional and package requirements, with equivalent or superior specifications.

Parameter Comparison

Part Number	Manufacturer	Drivers/Receivers	Data Rate	Receiver Hysteresis	Operating Temp	Product Status	MSL Rating	Packaging
SP3243EBCT-L	MaxLinear, Inc.	3/5	250 kbps	300 mV	0°C ~ 70°C	Obsolete	3 (168 Hours)	Tube
MAX3244ECWI+	Analog Devices Inc./Maxim Integrated	3/5	250 kbps	500 mV	0°C ~ 70°C	Active	1 (Unlimited)	Tube
MAX3243EEWI+	Analog Devices Inc./Maxim Integrated	3/5	250 kbps	500 mV	-40°C ~ 85°C	Active	1 (Unlimited)	Tube
MAX3243EEWI+T	Analog Devices Inc./Maxim Integrated	3/5	250 kbps	500 mV	-40°C ~ 85°C	Active	1 (Unlimited)	Tape & Reel (TR)
MAX3243EIDW	Texas Instruments	3/5	500 kbps	500 mV	-40°C ~ 85°C	Last Time Buy	1 (Unlimited)	Tube
MAX3243EIDWR	Texas Instruments	3/5	500 kbps	500 mV	-40°C ~ 85°C	Active	1 (Unlimited)	Tape & Reel (TR)
MAX3244EEWI+	Analog Devices Inc./Maxim Integrated	3/5	250 kbps	500 mV	-40°C ~ 85°C	Active	1 (Unlimited)	Tube
MAX3244EEWI+T	Analog Devices Inc./Maxim Integrated	3/5	250 kbps	500 mV	-40°C ~ 85°C	Active	1 (Unlimited)	Tape & Reel (TR)
TRS3243IDWR	Texas Instruments	3/5	250 kbps	500 mV	-40°C ~ 85°C	Discontinued at DiGi Electronics	1 (Unlimited)	Tape & Reel (TR)
ICL3243CBZ-T	Renesas Electronics Corporation	3/5	250 kbps	300 mV	0°C ~ 70°C	Active	3 (168 Hours)	Tape & Reel (TR)
MAX3243CDWR	Texas Instruments	3/5	250 kbps	300 mV	0°C ~ 70°C	Active	1 (Unlimited)	Tape & Reel (TR)

Engineering Selection Recommendations

For Direct Replacement (Same Operating Temperature):

ICL3243CBZ-T and MAX3243CDWR are active products maintaining the original 0°C ~ 70°C operating temperature range. ICL3243CBZ-T matches the original 300 mV receiver hysteresis specification. MAX3243CDWR offers improved MSL rating (1 vs. 3) while maintaining temperature specifications. Both are ROHS3 compliant and available in active production status.

For Extended Temperature Applications:

MAX3243EEWI+T, MAX3244EEWI+T, MAX3243EIDWR, and MAX3244EEWI+ provide expanded operating temperature range (-40°C ~ 85°C) with active product status. These parts are suitable for applications requiring broader thermal performance and long-term availability. MAX3243EIDWR and MAX3243EIDW offer enhanced data rate capability (500 kbps vs. 250 kbps).

For High-Volume Production:

MAX3243EEWI+T and MAX3243EIDWR are available in Tape & Reel packaging with highest inventory levels (2100 and 6061 units respectively), supporting high-volume manufacturing requirements.

Avoid:

TRS3243IDWR is discontinued at DiGi Electronics and should not be selected for new designs. MAX3243EIDW carries Last Time Buy status and is not recommended for ongoing production.

Frequently Asked Questions (FAQ)

Q: Can MAX3244ECWI+ directly replace SP3243EBCT-L?

A: MAX3244ECWI+ is functionally equivalent in protocol, driver/receiver configuration, supply voltage, and package. However, it features 500 mV receiver hysteresis versus the original 300 mV, and maintains the same 0°C ~ 70°C operating temperature range. It is ROHS3 compliant with MSL rating 1 (Unlimited) versus the original MSL 3 (168 Hours), providing improved reliability characteristics.

Q: What is the difference between MAX3243EEWI+ and MAX3243EEWI+T?

A: Both parts are electrically identical with identical specifications. The primary difference is packaging: MAX3243EEWI+ is supplied in Tube packaging, while MAX3243EEWI+T is supplied in Tape & Reel (TR) format. Selection depends on assembly process requirements and volume needs.

Q: Why do some substitutes have 500 kbps data rate instead of 250 kbps?

A: MAX3243EIDW and MAX3243EIDWR feature enhanced data rate capability (500 kbps) while maintaining full backward compatibility with 250 kbps operation. This represents a performance upgrade suitable for applications requiring higher communication speeds.

Q: Is ICL3243CBZ-T a suitable replacement?

A: ICL3243CBZ-T is an active product from Renesas Electronics Corporation with identical operating temperature range (0°C ~ 70°C) and receiver hysteresis (300 mV) to the original SP3243EBCT-L. It maintains the same 3/5 driver/receiver configuration and 28-SOIC package. This part is suitable for direct replacement in applications with the original temperature specifications.

Q: What does MSL rating mean for component selection?

A: MSL (Moisture Sensitivity Level) indicates the component's sensitivity to moisture during storage and handling. MSL 1 (Unlimited) provides superior moisture tolerance compared to MSL 3 (168 Hours), which requires controlled storage conditions. Substitute parts with MSL 1 rating offer improved shelf life and handling flexibility.

Q: Are all substitute parts ROHS3 compliant?

A: All listed substitute parts carry ROHS3 compliance certification. The original SP3243EBCT-L does not specify ROHS status. All substitutes are REACH Unaffected and carry EAR99 ECCN classification matching the original part.

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