SN75LBC241DW RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The SN75LBC241DW is a full-duplex RS232 transceiver manufactured by Texas Instruments, housed in a 28-SOIC surface mount package. This device integrates 4 drivers and 5 receivers for bidirectional serial communication. The part is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain flexibility for applications requiring RS232 interface functionality.

Key Parameters

Parameter	Value
Manufacturer Part Number	SN75LBC241DW
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	4/5
Duplex	Full
Data Rate	100 Kbps
Voltage Supply	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package / Case	28-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Receiver Hysteresis	500 mV
RoHS Status	ROHS3 Compliant
Product Status	Last Time Buy

Substitute Part Grouping Explanation

Substitution of the SN75LBC241DW is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

Protocol: RS232
Number of Drivers/Receivers: 4/5 configuration
Duplex: Full
Package / Case: 28-SOIC (0.295", 7.50mm Width)
Voltage Supply: 4.5V ~ 5.5V
Receiver Hysteresis: 500 mV
Mounting Type: Surface Mount
RoHS Compliance: ROHS3 Compliant

Allowable Variations:

Data Rate: Substitute parts may exceed the 100 Kbps specification (120 Kbps or 230 Kbps acceptable)
Operating Temperature: Extended temperature ranges (-40°C ~ 85°C) are acceptable for industrial applications
Packaging Format: Tube or Tape & Reel (TR) formats are interchangeable for the same electrical device
Manufacturer: Alternative manufacturers (Analog Devices Inc./Maxim Integrated, MaxLinear, Inc.) are acceptable if all electrical and mechanical parameters align

Parameter Comparison

Part Number	Manufacturer	Data Rate	Operating Temperature	Packaging	Product Status	Inventory
SN75LBC241DW	Texas Instruments	100 Kbps	0°C ~ 70°C	—	Last Time Buy	3776 Pcs
MAX211CDWR	Texas Instruments	120 Kbps	0°C ~ 70°C	Tape & Reel (TR)	Active	4778 Pcs
MAX241CWI+	Analog Devices Inc./Maxim Integrated	120 Kbps	0°C ~ 70°C	Tube	Active	2200 Pcs
MAX241CWI+T	Analog Devices Inc./Maxim Integrated	120 Kbps	0°C ~ 70°C	Tape & Reel (TR)	Active	2256 Pcs
MAX241ECWI+	Analog Devices Inc./Maxim Integrated	120 Kbps	0°C ~ 70°C	Tube	Active	1736 Pcs
MAX241ECWI+T	Analog Devices Inc./Maxim Integrated	120 Kbps	0°C ~ 70°C	Tape & Reel (TR)	Active	3063 Pcs
MAX241EEWI+	Analog Devices Inc./Maxim Integrated	120 Kbps	-40°C ~ 85°C	Tube	Active	860 Pcs
MAX241EEWI+T	Analog Devices Inc./Maxim Integrated	120 Kbps	-40°C ~ 85°C	Tape & Reel (TR)	Active	2140 Pcs
MAX241EWI+	Analog Devices Inc./Maxim Integrated	120 Kbps	-40°C ~ 85°C	Tube	Active	903 Pcs
MAX241EWI+T	Analog Devices Inc./Maxim Integrated	120 Kbps	-40°C ~ 85°C	Tape & Reel (TR)	Active	2070 Pcs
SP211ECT-L/TR	MaxLinear, Inc.	230 Kbps	0°C ~ 70°C	Tape & Reel (TR)	Active	1761 Pcs

Engineering Selection Recommendations

All listed substitute parts maintain active product status, ensuring long-term availability and manufacturing support. Selection should prioritize parts with Active status over Last Time Buy to avoid future supply constraints.

For Standard Operating Temperature Range (0°C ~ 70°C): MAX211CDWR, MAX241CWI+, MAX241CWI+T, MAX241ECWI+, MAX241ECWI+T, and SP211ECT-L/TR are suitable direct replacements. MAX211CDWR offers the highest inventory availability (4778 Pcs) among Texas Instruments options. SP211ECT-L/TR provides enhanced data rate capability (230 Kbps) for applications requiring higher throughput.

For Extended Operating Temperature Range (-40°C ~ 85°C): MAX241EEWI+, MAX241EEWI+T, MAX241EWI+, and MAX241EWI+T are appropriate selections. These variants support industrial and automotive temperature specifications while maintaining all other electrical parameters.

For Packaging Preference: Tape & Reel (TR) format is recommended for high-volume production environments. Tube packaging is suitable for lower-volume or prototype applications. Both formats are electrically equivalent.

All substitute parts maintain ROHS3 compliance and RoHS certification status, ensuring regulatory alignment with the original SN75LBC241DW specification.

Frequently Asked Questions (FAQ)

Q: Can MAX241 variants from Analog Devices Inc./Maxim Integrated directly replace the SN75LBC241DW?

A: Yes. All MAX241 variants listed maintain identical electrical specifications for RS232 protocol, 4/5 driver-receiver configuration, full-duplex operation, 500 mV receiver hysteresis, 4.5V ~ 5.5V supply voltage, and 28-SOIC package geometry. Data rate differences (120 Kbps vs. 100 Kbps) are not limiting factors, as higher rates are backward compatible.

Q: What is the difference between MAX241ECWI+ and MAX241EWI+ variants?

A: Both variants support extended operating temperature range (-40°C ~ 85°C) and 120 Kbps data rate. The primary difference is packaging format: MAX241ECWI+ is supplied in Tube, while MAX241EWI+ is also supplied in Tube. The "+T" suffix indicates Tape & Reel (TR) packaging. Electrical performance is identical across all variants.

Q: Is SP211ECT-L/TR compatible with the SN75LBC241DW?

A: Yes. SP211ECT-L/TR meets all critical substitution parameters: RS232 protocol, 4/5 driver-receiver configuration, full-duplex operation, 500 mV receiver hysteresis, 4.5V ~ 5.5V supply voltage, and 28-SOIC package. The 230 Kbps data rate exceeds the original 100 Kbps specification, providing enhanced performance capability without compromising compatibility.

Q: Does operating temperature range affect substitution eligibility?

A: Extended temperature variants (MAX241EEWI+, MAX241EEWI+T, MAX241EWI+, MAX241EWI+T) are suitable substitutes for standard temperature applications. However, standard temperature variants (MAX241CWI+, MAX241CWI+T, MAX241ECWI+, MAX241ECWI+T) are not recommended for applications requiring -40°C ~ 85°C operation.

Q: What inventory considerations should guide part selection?

A: MAX211CDWR offers the highest inventory level (4778 Pcs), followed by MAX241ECWI+T (3063 Pcs) and MAX241CWI+T (2256 Pcs). For applications with extended lead time requirements, these options provide supply security. SP211ECT-L/TR (1761 Pcs) and MAX241EEWI+ (860 Pcs) have lower inventory levels.

Q: Are Tube and Tape & Reel packaging formats interchangeable?

A: Yes. Both packaging formats contain electrically identical components. Selection depends on assembly process requirements: Tape & Reel (TR) is optimized for automated pick-and-place assembly, while Tube packaging is suitable for manual assembly or lower-volume production runs.

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