ISO7241CDWG4 Digital Isolator Equivalent & Substitute Parts

Part Overview

The ISO7241CDWG4 is a general purpose digital isolator manufactured by Texas Instruments, featuring 2500Vrms isolation voltage, 4 channels, and 25Mbps data rate in a 16-SOIC package. This part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	ISO7241CDWG4
Manufacturer	Texas Instruments
Isolation Voltage	2500Vrms
Number of Channels	4
Channel Configuration	3 Input / 1 Output (Unidirectional)
Data Rate	25Mbps
Common Mode Transient Immunity	25kV/µs
Propagation Delay (Max)	42ns (tpLH), 42ns (tpHL)
Supply Voltage Range	3.15V ~ 5.5V
Operating Temperature	-40°C ~ 125°C
Package	16-SOIC (0.295", 7.50mm Width)
Technology	Capacitive Coupling
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
MSL Rating	2 (1 Year)

Substitute Part Grouping Explanation

Substitution for the ISO7241CDWG4 is determined by the following critical parameters:

Primary Substitutes (Identical Electrical & Mechanical Specifications):

Isolation voltage: 2500Vrms
Channel count: 4 channels
Channel configuration: 3/1 input/output
Data rate: 25Mbps
Package: 16-SOIC
Technology: Capacitive coupling

Parametric Equivalents (Reduced Channel Count):

ISO7230CDW and ISO7231CDW feature 3 channels instead of 4, with identical isolation voltage, data rate, and package specifications. These are suitable only when the application requires fewer isolated channels.

Cross-Manufacturer Alternatives (Different Isolation Voltage or Data Rate):

MAX14131FAEE+ and MAX14131FAEE+T: 1000Vrms isolation, 150Mbps data rate, 4 channels, 16-SSOP package
MAX14931 series: 2750Vrms isolation, varying data rates (1Mbps to 25Mbps), 4 channels, 16-SOIC package

Parameter Comparison

Part Number	Manufacturer	Isolation (Vrms)	Channels	Config (In/Out)	Data Rate	Package	Status	Inventory
ISO7241CDWG4	Texas Instruments	2500	4	3/1	25Mbps	16-SOIC	Obsolete	1900 Pcs
ISO7241CDW	Texas Instruments	2500	4	3/1	25Mbps	16-SOIC	Last Time Buy	77600 Pcs
ISO7241CDWR	Texas Instruments	2500	4	3/1	25Mbps	16-SOIC	Active	17100 Pcs
ISO7230CDW	Texas Instruments	2500	3	3/0	25Mbps	16-SOIC	Last Time Buy	3400 Pcs
ISO7231CDW	Texas Instruments	2500	3	2/1	25Mbps	16-SOIC	Last Time Buy	1298 Pcs
MAX14131FAEE+	Analog Devices/Maxim	1000	4	3/1	150Mbps	16-SSOP	Active	32100 Pcs
MAX14131FAEE+T	Analog Devices/Maxim	1000	4	3/1	150Mbps	16-SSOP	Active	3614 Pcs
MAX14931AAWE+	Analog Devices/Maxim	2750	4	3/1	1Mbps	16-SOIC	Active	2400 Pcs
MAX14931AAWE+T	Analog Devices/Maxim	2750	4	3/1	1Mbps	16-SOIC	Active	808 Pcs
MAX14931BAWE+	Analog Devices/Maxim	2750	4	3/1	25Mbps	16-SOIC	Active	920 Pcs
MAX14931BAWE+T	Analog Devices/Maxim	2750	4	3/1	25Mbps	16-SOIC	Active	1711 Pcs

Engineering Selection Recommendations

Recommended Primary Substitutes:

ISO7241CDWR is the preferred direct replacement. It maintains identical electrical specifications (2500Vrms, 4 channels, 25Mbps, 3/1 configuration) and package format (16-SOIC), with active product status and substantial inventory availability (17100 units). This part requires no circuit redesign.

ISO7241CDW provides equivalent electrical and mechanical specifications with Last Time Buy status and higher inventory (77600 units), suitable for applications where long-term availability is not critical.

Parametric Equivalents for Reduced Channel Requirements:

ISO7230CDW and ISO7231CDW are suitable only when the application requires fewer than 4 isolated channels. Both maintain 2500Vrms isolation and 25Mbps data rate in the same 16-SOIC package but feature 3-channel configurations with different input/output splits.

Cross-Manufacturer Alternatives:

MAX14931BAWE+ and MAX14931BAWE+T (Analog Devices/Maxim) provide 2750Vrms isolation with 25Mbps data rate in 16-SOIC packaging, maintaining the same channel configuration (3/1). These parts are active with established supply chains and support wider supply voltage range (1.71V ~ 5.5V) compared to the original part (3.15V ~ 5.5V).

MAX14131FAEE+ and MAX14131FAEE+T offer higher data rate performance (150Mbps) with lower isolation voltage (1000Vrms) in a 16-SSOP package. These require PCB layout modifications due to different package footprint and are suitable only when reduced isolation voltage is acceptable and higher speed is required.

All recommended substitutes maintain ROHS3 compliance and EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can ISO7241CDW directly replace ISO7241CDWG4?

A: Yes. ISO7241CDW is electrically and mechanically identical, differing only in packaging format (Tube vs. standard packaging). No circuit modifications are required.

Q: What is the difference between ISO7241CDWR and ISO7241CDW?

A: Both parts are electrically identical with 2500Vrms isolation, 4 channels, and 25Mbps data rate. ISO7241CDWR is in active production status with Cut Tape & Digi-Reel packaging, while ISO7241CDW is Last Time Buy with Tube packaging. ISO7241CDWR is preferred for new designs.

Q: Can ISO7230CDW or ISO7231CDW be used as direct replacements?

A: Only if your application uses 3 or fewer isolated channels. Both parts reduce channel count from 4 to 3 while maintaining 2500Vrms isolation and 25Mbps data rate. ISO7230CDW provides 3 input channels with no output channels, while ISO7231CDW provides 2 input and 1 output channel.

Q: What are the key differences between Texas Instruments ISO7241 and Analog Devices MAX14931 series?

A: MAX14931BAWE+ and MAX14931BAWE+T offer slightly higher isolation voltage (2750Vrms vs. 2500Vrms) and wider supply voltage range (1.71V ~ 5.5V vs. 3.15V ~ 5.5V). Both maintain 4-channel configuration, 25Mbps data rate, and 16-SOIC package. The MAX14931 series is actively produced with established inventory.

Q: Why would I choose MAX14131FAEE+ over ISO7241CDWR?

A: MAX14131FAEE+ provides 6x higher data rate (150Mbps vs. 25Mbps) and lower isolation voltage (1000Vrms vs. 2500Vrms). However, it uses a different package (16-SSOP vs. 16-SOIC), requiring PCB redesign. This part is suitable only for applications requiring higher speed performance where reduced isolation voltage is acceptable.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH Unaffected status, matching the original ISO7241CDWG4 environmental certifications.

Q: What packaging options are available for the recommended substitutes?

A: ISO7241CDWR is available in Cut Tape & Digi-Reel format. ISO7241CDW is available in Tube packaging. MAX14931 series parts are available in both Tube and Tape & Reel formats. Select packaging based on your assembly process requirements.

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