ICL3241CB Equivalent & Substitute Parts

Part Overview

The ICL3241CB is a 3/5 Transceiver Full RS232 interface IC manufactured by Renesas Electronics Corporation 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 design implementations. The ICL3241CB operates across a 3V to 5.5V supply range with a 250kbps data rate and 300mV receiver hysteresis, serving as a full-duplex RS232 transceiver for serial communication applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	ICL3241CB
Manufacturer	Renesas Electronics Corporation
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	3/5
Duplex	Full
Receiver Hysteresis	300 mV
Data Rate	250kbps
Voltage - Supply	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Mounting Type	Surface Mount
Package / Case	28-SOIC (0.295", 7.50mm Width)
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution for the ICL3241CB is determined by strict alignment of the following electrical and mechanical parameters:

Critical Parameters for Substitution:

Protocol: RS232
Number of Drivers/Receivers: 3/5
Duplex: Full
Package / Case: 28-SOIC (0.295", 7.50mm Width)
Mounting Type: Surface Mount
Voltage - Supply: 3V ~ 5.5V

Acceptable Parameter Variations:

Receiver Hysteresis: 300mV or 500mV (both acceptable for RS232 full-duplex operation)
Data Rate: 235kbps or higher (250kbps minimum maintained or exceeded)
Operating Temperature: Extended range (-40°C ~ 85°C) acceptable as superset of 0°C ~ 70°C
RoHS Status: ROHS3 Compliant preferred over non-compliant
Packaging Format: Tube or Tape & Reel (TR) both acceptable

Substitute parts are grouped into two categories: Parametric Equivalents (matching all critical parameters with minimal variation) and Similar parts (matching core functionality with acceptable parameter differences).

Parameter Comparison

Part Number	Manufacturer	Drivers/Receivers	Data Rate	Receiver Hysteresis	Operating Temp	Product Status	RoHS Status	Packaging
ICL3241CB	Renesas	3/5	250kbps	300mV	0°C ~ 70°C	Obsolete	Non-compliant	Tube
ICL3243CBZ	Renesas	3/5	250kbps	300mV	0°C ~ 70°C	Active	ROHS3 Compliant	Tube
MAX3241CWI+	Analog Devices/Maxim	3/5	235kbps	300mV	0°C ~ 70°C	Active	ROHS3 Compliant	Tube
MAX3241ECWI+	Analog Devices/Maxim	3/5	250kbps	500mV	0°C ~ 70°C	Active	ROHS3 Compliant	Tube
MAX3241ECWI+T	Analog Devices/Maxim	3/5	250kbps	500mV	0°C ~ 70°C	Active	ROHS3 Compliant	Tape & Reel
MAX3241EEWI+	Analog Devices/Maxim	3/5	250kbps	500mV	-40°C ~ 85°C	Active	ROHS3 Compliant	Tube
MAX3241EEWI+T	Analog Devices/Maxim	3/5	250kbps	500mV	-40°C ~ 85°C	Active	ROHS3 Compliant	Tape & Reel
MAX3241EWI+	Analog Devices/Maxim	3/5	1Mbps	500mV	-40°C ~ 85°C	Active	ROHS3 Compliant	Tube
MAX3243CDW	Texas Instruments	3/5	250kbps	300mV	0°C ~ 70°C	Obsolete	ROHS3 Compliant	Tube
MAX3243ECWI+	Analog Devices/Maxim	3/5	250kbps	300mV	0°C ~ 70°C	Active	ROHS3 Compliant	Tube

Engineering Selection Recommendations

Primary Recommendation: ICL3243CBZ

The ICL3243CBZ from Renesas Electronics is the closest parametric equivalent to the ICL3241CB. It maintains identical electrical specifications (3/5 drivers/receivers, 250kbps data rate, 300mV receiver hysteresis, 0°C ~ 70°C operating range) while offering active product status and ROHS3 compliance. This part is suitable for direct replacement in existing designs.

Secondary Recommendation: MAX3243ECWI+

The MAX3243ECWI+ from Analog Devices/Maxim Integrated provides parametric equivalence with identical electrical performance and active product status. ROHS3 compliance and unlimited moisture sensitivity level (MSL 1) support extended shelf life and storage flexibility.

Extended Temperature Alternative: MAX3241EEWI+ or MAX3241EEWI+T

For applications requiring extended operating temperature range (-40°C ~ 85°C), the MAX3241EEWI+ (Tube) or MAX3241EEWI+T (Tape & Reel) offer identical electrical specifications with broader thermal performance. The Tape & Reel variant (MAX3241EEWI+T) is preferred for high-volume production.

High-Speed Alternative: MAX3241EWI+

The MAX3241EWI+ supports 1Mbps data rate with extended temperature range (-40°C ~ 85°C), suitable for applications requiring higher communication speeds while maintaining full RS232 3/5 transceiver functionality.

Obsolete Status Consideration: MAX3243CDW

The MAX3243CDW from Texas Instruments shares obsolete product status with the ICL3241CB and is not recommended for new designs. Existing inventory may be used for legacy system maintenance only.

Frequently Asked Questions (FAQ)

Q: Can MAX3241ECWI+ replace ICL3241CB directly?

A: Yes. The MAX3241ECWI+ maintains all critical parameters: 3/5 RS232 transceiver, full-duplex operation, 250kbps data rate, 3V ~ 5.5V supply, and 28-SOIC package. The 500mV receiver hysteresis (versus 300mV) is acceptable for RS232 applications. Both operate within 0°C ~ 70°C range.

Q: What is the difference between Tube and Tape & Reel packaging?

A: Tube packaging is suitable for manual assembly and small-volume applications. Tape & Reel (TR) packaging is designed for automated pick-and-place assembly in high-volume production. Electrical specifications remain identical; packaging choice depends on manufacturing process requirements.

Q: Why is receiver hysteresis variation acceptable?

A: RS232 protocol tolerates receiver hysteresis values of 300mV to 500mV. Both values ensure reliable signal discrimination and noise immunity within the RS232 specification. The higher hysteresis (500mV) provides additional noise margin in electrically noisy environments.

Q: Is ROHS3 compliance mandatory for substitution?

A: ROHS3 compliance is preferred for new designs and regulatory alignment. The ICL3241CB is RoHS non-compliant, but all active substitute parts listed are ROHS3 compliant, supporting modern environmental and regulatory requirements.

Q: Can I use MAX3241EWI+ in place of ICL3241CB?

A: Yes, with consideration for extended capabilities. The MAX3241EWI+ supports 1Mbps data rate (versus 250kbps) and extended operating temperature (-40°C ~ 85°C versus 0°C ~ 70°C). These are superset capabilities; the part operates correctly at ICL3241CB specifications while offering additional performance headroom.

Q: What is the inventory status of substitute parts?

A: ICL3243CBZ (1060 pcs), MAX3243ECWI+ (2384 pcs), and MAX3241EEWI+ (2124 pcs) maintain substantial active inventory. MAX3241CWI+ (947 pcs) and MAX3241ECWI+ (834 pcs) have moderate availability. All listed parts are in stock as new original components.

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