ISL31472EIBZ Equivalent & Substitute Parts

Part Overview

The ISL31472EIBZ is a half-duplex RS422/RS485 transceiver IC manufactured by Renesas Electronics Corporation. This interface component operates at 250 kbps data rate with a 1/1 driver/receiver configuration in an 8-SOIC surface mount package. The part is currently active in production with 12,490 units in stock inventory.

Substitute parts are necessary when the primary part becomes unavailable, when alternative packaging formats are required, or when enhanced performance specifications better suit application requirements while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	ISL31472EIBZ
Manufacturer	Renesas Electronics Corporation
Protocol	RS422, RS485
Number of Drivers/Receivers	1/1
Duplex Mode	Half
Data Rate	250 kbps
Receiver Hysteresis	25 mV
Supply Voltage	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	3 (168 Hours)

Substitute Part Grouping Explanation

Substitute parts for the ISL31472EIBZ are classified into two categories based on parametric equivalence:

Parametric Equivalents maintain identical electrical specifications across all critical parameters: RS422/RS485 protocol support, 1/1 driver/receiver configuration, half-duplex operation, 25 mV receiver hysteresis, 250 kbps data rate, 4.5V–5.5V supply voltage range, -40°C to 85°C operating temperature, and 8-SOIC package format. These parts are direct functional replacements with no design modifications required.

Similar Parts share the same protocol, duplex mode, driver/receiver count, and package format but differ in one or more of the following parameters: data rate, supply voltage range, operating temperature range, receiver hysteresis, or moisture sensitivity level. Selection of similar parts requires engineering evaluation to confirm compatibility with application-specific requirements.

Parameter Comparison

Part Number	Manufacturer	Protocol	Data Rate	Supply Voltage	Operating Temp	Receiver Hysteresis	Package	Inventory	Classification
ISL31472EIBZ	Renesas	RS422, RS485	250 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	25 mV	8-SOIC	12,490	Primary
ISL32472EIBZ	Renesas	RS422, RS485	250 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	25 mV	8-SOIC	1,775	Parametric Equivalent
ISL32492EIBZ	Renesas	RS422, RS485	250 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	25 mV	8-SOIC	7,584	Parametric Equivalent
MAX13444EASA+	Analog Devices/Maxim	RS422, RS485	250 kbps	4.75V ~ 5.25V	-40°C ~ 125°C	25 mV	8-SOIC	3,800	Similar
MAX13444EASA+T	Analog Devices/Maxim	RS422, RS485	250 kbps	4.75V ~ 5.25V	-40°C ~ 125°C	25 mV	8-SOIC	2,498	Similar
MAX13485EESA+	Analog Devices/Maxim	RS422, RS485	500 kbps	4.75V ~ 5.25V	-40°C ~ 85°C	25 mV	8-SOIC	1,210	Similar
MAX13485EESA+T	Analog Devices/Maxim	RS422, RS485	500 kbps	4.75V ~ 5.25V	-40°C ~ 85°C	25 mV	8-SOIC	77,600	Similar
MAX13486EESA+	Analog Devices/Maxim	RS422, RS485	16 Mbps	4.75V ~ 5.25V	-40°C ~ 85°C	25 mV	8-SOIC	12,900	Similar
MAX3463CSA+	Analog Devices/Maxim	RS422, RS485	20 Mbps	4.75V ~ 5.25V	0°C ~ 70°C	50 mV	8-SOIC	2,192	Similar
MAX3463ESA+	Analog Devices/Maxim	RS422, RS485	20 Mbps	4.75V ~ 5.25V	-40°C ~ 85°C	50 mV	8-SOIC	2,300	Similar
MAX3464CSA+	Analog Devices/Maxim	RS422, RS485	20 Mbps	4.75V ~ 5.25V	0°C ~ 70°C	50 mV	8-SOIC	787	Similar

Engineering Selection Recommendations

For Direct Replacement: ISL32472EIBZ and ISL32492EIBZ are parametric equivalents of ISL31472EIBZ and require no circuit modifications. Both parts maintain identical electrical specifications and 8-SOIC packaging. ISL32492EIBZ offers higher inventory availability (7,584 units) compared to ISL32472EIBZ (1,775 units).

For Supply Voltage Compatibility: MAX13444EASA+ and MAX13444EASA+T operate within a narrower supply voltage range (4.75V–5.25V) compared to the primary part (4.5V–5.5V). These parts are suitable for applications with regulated 5V supplies and offer extended operating temperature range (-40°C to 125°C). The +T variant is supplied in Cut Tape format rather than Tube packaging.

For Enhanced Data Rate: MAX13485EESA+, MAX13485EESA+T, MAX13486EESA+, MAX3463ESA+, and MAX3463CSA+ support higher data rates (500 kbps to 20 Mbps) while maintaining RS422/RS485 protocol compliance and 8-SOIC packaging. These parts are suitable for applications requiring bandwidth beyond 250 kbps. MAX13485EESA+T has the highest inventory (77,600 units).

For Industrial Temperature Range: MAX3463ESA+ supports the full -40°C to 85°C operating temperature range with 20 Mbps data rate capability and 50 mV receiver hysteresis. This part is suitable for extended temperature applications requiring higher bandwidth.

Compliance Considerations: All listed parts maintain ROHS3 compliance and REACH unaffected status, consistent with the primary part. Moisture sensitivity levels vary: Renesas parts carry MSL 3 (168 hours) or MSL 2 (1 year), while Maxim/Analog Devices parts carry MSL 1 (unlimited).

Frequently Asked Questions (FAQ)

Q: Can ISL32472EIBZ and ISL32492EIBZ be used as direct replacements for ISL31472EIBZ?

A: Yes. Both parts are parametric equivalents with identical electrical specifications across protocol, data rate, supply voltage, operating temperature, receiver hysteresis, and package format. No circuit modifications are required.

Q: What is the difference between MAX13444EASA+ and MAX13444EASA+T?

A: Both parts are electrically identical. The primary difference is packaging format: MAX13444EASA+ is supplied in Tube packaging, while MAX13444EASA+T is supplied in Cut Tape (CT) & Digi-Reel format. The +T variant is typically used for automated assembly processes.

Q: Can I use MAX13485EESA+T instead of ISL31472EIBZ in a 250 kbps application?

A: Yes, with engineering evaluation. MAX13485EESA+T supports 500 kbps data rate, which exceeds the 250 kbps requirement of ISL31472EIBZ. The part maintains identical supply voltage range (4.5V–5.5V when considering the Renesas part's range), operating temperature (-40°C to 85°C), receiver hysteresis (25 mV), and 8-SOIC package. Higher data rate capability does not degrade performance in lower-speed applications.

Q: Why do MAX3463 series parts have 50 mV receiver hysteresis instead of 25 mV?

A: Receiver hysteresis is a design parameter that affects noise immunity and switching threshold characteristics. The 50 mV hysteresis in MAX3463 series provides increased noise margin compared to the 25 mV specification of ISL31472EIBZ. This difference must be evaluated for applications with marginal signal integrity or high-noise environments.

Q: What is the significance of MSL (Moisture Sensitivity Level) ratings?

A: MSL ratings indicate the maximum time a component can be exposed to ambient conditions (typically 30°C, 85% relative humidity) before soldering. ISL31472EIBZ carries MSL 3 (168 hours), while Maxim/Analog Devices parts carry MSL 1 (unlimited). Lower MSL numbers provide greater handling flexibility and longer shelf life without baking requirements.

Q: Can I use MAX3463CSA+ in an application requiring -40°C operation?

A: No. MAX3463CSA+ operates from 0°C to 70°C and does not support the -40°C lower temperature limit of ISL31472EIBZ. Use MAX3463ESA+ instead, which supports -40°C to 85°C operation.

Q: Are all listed parts available in 8-SOIC package?

A: Yes. All substitute parts listed maintain the 8-SOIC (0.154", 3.90mm Width) package format, ensuring mechanical and electrical compatibility with existing PCB designs.

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