ICL3241IV RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The ICL3241IV is a full-duplex RS232 transceiver manufactured by Renesas Electronics Corporation, configured with 3 drivers and 5 receivers in a 28-TSSOP surface mount package. This component operates across a 3V to 5.5V supply range with a 250 kbps data rate and supports industrial temperature ranges from -40°C to 85°C.

The ICL3241IV is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this interface standard.

Key Parameters

Parameter	ICL3241IV Value
Manufacturer	Renesas Electronics Corporation
Protocol	RS232
Type	Transceiver
Drivers/Receivers	3/5
Duplex	Full
Data Rate	250 kbps
Voltage Supply	3V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package Type	28-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Receiver Hysteresis	300 mV
RoHS Status	RoHS non-compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the ICL3241IV is determined by the following critical parameters:

Mandatory Compatibility Parameters:

Protocol: RS232
Type: Transceiver
Drivers/Receivers: 3/5 configuration
Duplex: Full
Voltage Supply: 3V ~ 5.5V
Package/Case: 28-TSSOP or mechanically compatible equivalent
Mounting Type: Surface Mount

Performance Parameters (Allowable Variance):

Data Rate: 235 kbps minimum (ICL3241IV operates at 250 kbps)
Receiver Hysteresis: 300 mV or 500 mV acceptable
Operating Temperature: -40°C to 85°C preferred; 0°C to 70°C acceptable for reduced-range applications

Compliance Parameters:

RoHS Status: Both compliant and non-compliant parts are listed; selection depends on application requirements
Moisture Sensitivity Level: MSL 1 (Unlimited) or MSL 3 (168 Hours) acceptable

Substitute parts are grouped by manufacturer (Analog Devices/Maxim Integrated MAX3241 series and STMicroelectronics ST3241 series) and packaging format (Tube, Tape & Reel, Cut Tape).

Parameter Comparison

Part Number	Manufacturer	Data Rate	Receiver Hysteresis	Operating Temp	Package	RoHS Status	Product Status	Inventory
ICL3241IV	Renesas	250 kbps	300 mV	-40°C ~ 85°C	28-TSSOP	Non-compliant	Obsolete	2806 Pcs
MAX3241CUI+	Analog Devices/Maxim	235 kbps	300 mV	0°C ~ 70°C	28-TSSOP	ROHS3 Compliant	Active	929 Pcs
MAX3241CUI+T	Analog Devices/Maxim	235 kbps	300 mV	0°C ~ 70°C	28-TSSOP	ROHS3 Compliant	Active	1055 Pcs
MAX3241ECUI+	Analog Devices/Maxim	250 kbps	500 mV	0°C ~ 70°C	28-TSSOP	ROHS3 Compliant	Active	10038 Pcs
MAX3241ECUI+T	Analog Devices/Maxim	250 kbps	500 mV	0°C ~ 70°C	28-TSSOP	ROHS3 Compliant	Active	1045 Pcs
MAX3241EEUI+	Analog Devices/Maxim	250 kbps	500 mV	-40°C ~ 85°C	28-TSSOP	ROHS3 Compliant	Active	2228 Pcs
MAX3241EEUI+T	Analog Devices/Maxim	250 kbps	500 mV	-40°C ~ 85°C	28-TSSOP	ROHS3 Compliant	Active	2000 Pcs
MAX3241EUI+	Analog Devices/Maxim	235 kbps	300 mV	-40°C ~ 85°C	28-TSSOP	ROHS3 Compliant	Active	924 Pcs
MAX3241EUI+T	Analog Devices/Maxim	235 kbps	300 mV	-40°C ~ 85°C	28-TSSOP	ROHS3 Compliant	Active	3900 Pcs
ST3241EBPR	STMicroelectronics	250 kbps	300 mV	-40°C ~ 85°C	28-SSOP	ROHS3 Compliant	Active	6553 Pcs
ST3241ECPR	STMicroelectronics	250 kbps	300 mV	0°C ~ 70°C	28-SSOP	ROHS3 Compliant	Active	2610 Pcs

Engineering Selection Recommendations

For Industrial Temperature Range Applications (-40°C to 85°C):

MAX3241EEUI+ and MAX3241EEUI+T are direct functional equivalents with matching operating temperature range, 250 kbps data rate, and 28-TSSOP package. Both are ROHS3 compliant and active products with substantial inventory availability. Selection between these variants depends on packaging format: Tube (MAX3241EEUI+) or Tape & Reel (MAX3241EEUI+T).

MAX3241EUI+ and MAX3241EUI+T also support the full industrial temperature range with 235 kbps data rate and 300 mV receiver hysteresis. These variants offer higher inventory levels (924 and 3900 Pcs respectively) and are suitable where the reduced data rate is acceptable.

ST3241EBPR provides an alternative from STMicroelectronics with matching performance specifications (-40°C to 85°C, 250 kbps, 300 mV hysteresis). The 28-SSOP package (0.209", 5.30mm width) differs from the 28-TSSOP footprint and requires PCB layout verification. MSL rating of 3 (168 Hours) requires moisture control during storage and assembly.

For Commercial Temperature Range Applications (0°C to 70°C):

MAX3241ECUI+ and MAX3241ECUI+T are suitable substitutes with 250 kbps data rate and 28-TSSOP package compatibility. The 500 mV receiver hysteresis provides enhanced noise immunity compared to the original 300 mV specification.

MAX3241CUI+ and MAX3241CUI+T operate at 235 kbps with 300 mV hysteresis and are available in both Tube and Tape & Reel packaging.

ST3241ECPR from STMicroelectronics matches the commercial temperature range with 250 kbps performance and 28-SSOP package.

RoHS Compliance Consideration:

All substitute parts listed are ROHS3 compliant. The original ICL3241IV is RoHS non-compliant. Selection of RoHS-compliant substitutes is necessary for applications subject to RoHS directive requirements or customer specifications mandating compliance.

Frequently Asked Questions (FAQ)

Q: Can MAX3241 series parts directly replace the ICL3241IV without PCB modifications?

A: Yes, all MAX3241 variants maintain the 28-TSSOP package footprint and pinout compatibility with the ICL3241IV. No PCB layout changes are required for these substitutions.

Q: What is the difference between MAX3241EEUI+ and MAX3241EUI+ variants?

A: Both support the full -40°C to 85°C industrial temperature range and 28-TSSOP package. MAX3241EEUI+ operates at 250 kbps with 500 mV receiver hysteresis, while MAX3241EUI+ operates at 235 kbps with 300 mV hysteresis. Selection depends on whether the higher data rate or enhanced noise immunity is required.

Q: Can ST3241EBPR be used as a direct substitute despite the different package designation (28-SSOP vs. 28-TSSOP)?

A: The ST3241EBPR uses a 28-SSOP package (0.209", 5.30mm width) compared to the 28-TSSOP package (0.173", 4.40mm width) of the ICL3241IV. While both are 28-pin surface mount packages, the physical dimensions differ. PCB footprint verification is required before substitution. The ST3241EBPR is functionally equivalent with matching -40°C to 85°C temperature range and 250 kbps data rate.

Q: What does the "+T" suffix indicate in part numbers like MAX3241ECUI+T?

A: The "+T" suffix indicates Tape & Reel packaging format, suitable for automated assembly processes. Parts without this suffix (e.g., MAX3241ECUI+) are supplied in Tube packaging. Both formats contain identical components; packaging selection depends on manufacturing process requirements.

Q: Are there data rate differences between substitute parts, and does this affect compatibility?

A: Yes, some substitutes operate at 235 kbps while others operate at 250 kbps. The ICL3241IV operates at 250 kbps. Parts rated at 235 kbps are backward compatible and will function in applications designed for 250 kbps operation. However, if the application requires the full 250 kbps data rate, select MAX3241ECUI+, MAX3241ECUI+T, MAX3241EEUI+, MAX3241EEUI+T, or ST3241EBPR variants.

Q: What is the significance of receiver hysteresis values (300 mV vs. 500 mV)?

A: Receiver hysteresis determines the voltage differential required for the receiver to switch logic states. Higher hysteresis (500 mV) provides improved noise immunity in electrically noisy environments. Lower hysteresis (300 mV) allows faster switching at lower signal amplitudes. Both values are acceptable for RS232 protocol compliance; selection depends on application noise environment.

Q: Which substitute part offers the best inventory availability?

A: MAX3241ECUI+ offers the highest inventory level at 10,038 Pcs. For applications requiring the full industrial temperature range (-40°C to 85°C), MAX3241EUI+T provides 3,900 Pcs and ST3241EBPR provides 6,553 Pcs.

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