ICL3241IBZ RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The ICL3241IBZ is a 3/5 transceiver for RS232 communication, manufactured by Renesas Electronics Corporation in a 28-SOIC surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. The ICL3241IBZ operates across a 3V to 5.5V supply range with full-duplex RS232 protocol support and a 250kbps data rate, suitable for legacy serial communication applications requiring industrial temperature ranges (-40°C to 85°C).

Key Parameters

Parameter	ICL3241IBZ Value
Manufacturer	Renesas Electronics Corporation
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	3/5
Duplex	Full
Data Rate	250kbps
Voltage - Supply	3V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package / Case	28-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Receiver Hysteresis	300 mV
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the ICL3241IBZ 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
Voltage Supply Range: 3V ~ 5.5V
Mounting Type: Surface Mount
Package Type: 28-SOIC or 28-TSSOP

Secondary Parameters (Allowable Variation):

Data Rate: Minimum 250kbps (higher rates are acceptable)
Operating Temperature: Must support at least -40°C to 85°C range
Receiver Hysteresis: 300 mV or 500 mV (both acceptable)
Product Status: Active preferred for new designs; obsolete acceptable for legacy support

Substitute parts are grouped into two categories: same-package (28-SOIC) direct replacements and alternative-package (28-TSSOP) substitutes. All listed substitutes maintain full electrical compatibility with the ICL3241IBZ within the specified parameter constraints.

Parameter Comparison

Part Number	Manufacturer	Package	Data Rate	Operating Temp	Receiver Hysteresis	Product Status	Inventory
ICL3241IBZ	Renesas	28-SOIC	250kbps	-40°C ~ 85°C	300 mV	Obsolete	816 Pcs
ICL3241EIVZ	Renesas	28-TSSOP	250kbps	-40°C ~ 85°C	500 mV	Active	1244 Pcs
MAX3241CWI+	Analog Devices/Maxim	28-SOIC	235Kbps	0°C ~ 70°C	300 mV	Active	947 Pcs
MAX3241ECWI+	Analog Devices/Maxim	28-SOIC	250kbps	0°C ~ 70°C	500 mV	Active	834 Pcs
MAX3241ECWI+T	Analog Devices/Maxim	28-SOIC	250kbps	0°C ~ 70°C	500 mV	Active	1060 Pcs
MAX3241EEWI+	Analog Devices/Maxim	28-SOIC	250kbps	-40°C ~ 85°C	500 mV	Active	2124 Pcs
MAX3241EEWI+T	Analog Devices/Maxim	28-SOIC	250kbps	-40°C ~ 85°C	500 mV	Active	1108 Pcs
MAX3241EWI+	Analog Devices/Maxim	28-SOIC	1Mbps	-40°C ~ 85°C	500 mV	Active	1002 Pcs

Engineering Selection Recommendations

For Direct Package Replacement (28-SOIC):

MAX3241EEWI+ and MAX3241EEWI+T are the primary substitutes for the ICL3241IBZ. Both parts maintain identical operating temperature range (-40°C to 85°C), matching data rate (250kbps), and package geometry (28-SOIC). Both are active products from Analog Devices/Maxim Integrated with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1), providing superior long-term availability compared to the obsolete ICL3241IBZ. The +T suffix indicates Tape & Reel packaging; both variants are electrically identical.

MAX3241EWI+ offers enhanced data rate capability (1Mbps) within the same package and temperature range, suitable for applications requiring higher serial communication speeds while maintaining full backward compatibility.

MAX3241ECWI+ and MAX3241ECWI+T are suitable alternatives when operating temperature can be limited to 0°C to 70°C. These parts provide active product status and full electrical compatibility within the specified temperature constraint.

MAX3241CWI+ is compatible for applications limited to 0°C to 70°C operation with data rates of 235kbps or lower.

For Alternative Package (28-TSSOP):

ICL3241EIVZ from Renesas Electronics provides an active product alternative in 28-TSSOP packaging. This part maintains the same manufacturer lineage, identical operating temperature range, and data rate specifications. The narrower package width (4.40mm vs. 7.50mm) requires PCB layout modification but provides equivalent electrical performance.

Compliance and Certification:

All substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the regulatory profile of the ICL3241IBZ. All parts carry EAR99 ECCN classification and identical HTSUS commodity codes.

Frequently Asked Questions (FAQ)

Q: Can MAX3241EEWI+ directly replace ICL3241IBZ without PCB modification?

A: Yes. Both parts use identical 28-SOIC packaging (0.295" width, 7.50mm), identical pin count (28), and identical electrical specifications for supply voltage, protocol, and driver/receiver configuration. No PCB layout changes are required for direct substitution.

Q: What is the difference between MAX3241EEWI+ and MAX3241EEWI+T?

A: Both parts are electrically identical. The +T suffix indicates Tape & Reel packaging format for automated assembly, while the non-T variant uses Tube packaging. Select based on your assembly process requirements.

Q: Why does MAX3241CWI+ have a lower data rate (235kbps) than the ICL3241IBZ (250kbps)?

A: MAX3241CWI+ is specified for 0°C to 70°C operating temperature. The lower data rate specification reflects the narrower temperature range. For applications requiring full -40°C to 85°C operation, use MAX3241EEWI+ or MAX3241EWI+.

Q: Is ICL3241EIVZ a suitable substitute if my PCB can accommodate 28-TSSOP packaging?

A: Yes. ICL3241EIVZ maintains all critical electrical parameters (RS232 protocol, 3/5 drivers/receivers, full duplex, 250kbps data rate, 3V to 5.5V supply, -40°C to 85°C operation). The 28-TSSOP package is narrower (4.40mm vs. 7.50mm), requiring PCB footprint modification. This part is active and provides Renesas continuity for legacy designs.

Q: Can I use MAX3241EWI+ in place of ICL3241IBZ if my application only requires 250kbps?

A: Yes. MAX3241EWI+ is rated for 1Mbps operation, which exceeds the 250kbps requirement. The higher data rate capability does not affect compatibility; the part will operate correctly at lower speeds. This substitution provides performance headroom for future design iterations.

Q: What is the moisture sensitivity level (MSL) difference between ICL3241IBZ and MAX3241 variants?

A: ICL3241IBZ carries MSL 3 (168 hours), while all MAX3241 variants carry MSL 1 (unlimited). MSL 1 provides superior moisture tolerance and longer shelf life, reducing risk during storage and assembly processes.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the regulatory requirements of the ICL3241IBZ.

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