ISO7242MDW Equivalent & Substitute Parts

Part Overview

The ISO7242MDW is a general purpose digital isolator manufactured by Texas Instruments, featuring 2500Vrms isolation voltage, 4 channels, and 150Mbps data rate in a 16-SOIC package. This device is classified as Last Time Buy, indicating end-of-life status. Alternative components are necessary for new designs and ongoing production requirements where continued availability cannot be assured.

Key Parameters

Parameter	ISO7242MDW
Manufacturer	Texas Instruments
Isolation Voltage	2500Vrms
Number of Channels	4
Channel Configuration	2/2 (Inputs - Side 1/Side 2)
Data Rate	150Mbps
Common Mode Transient Immunity	25kV/µs
Supply Voltage Range	3.15V ~ 5.5V
Operating Temperature	-40°C ~ 125°C
Package	16-SOIC (0.295", 7.50mm Width)
Technology	Capacitive Coupling
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution logic is based on the following critical parameters: isolation voltage, number of channels, channel configuration (2/2), data rate capability, common mode transient immunity, package type (16-SOIC), and operating temperature range. Parts are grouped into two categories:

Direct Packaging Substitute (Same Manufacturer): ISO7242MDWR maintains identical electrical specifications but differs in packaging format (Cut Tape & Digi-Reel versus Tube). This part is Active status and suitable for direct replacement in production environments.

Parametric Equivalents (Alternative Manufacturers): MAX14932 series devices from Analog Devices Inc./Maxim Integrated provide 4-channel, 2/2 configuration with 2750Vrms isolation (exceeds 2500Vrms requirement). These parts vary in data rate (1Mbps, 25Mbps, or 150Mbps), propagation delay, and supply voltage range (1.71V ~ 5.5V, broader than ISO7242MDW). All MAX14932 variants maintain 16-SOIC packaging and Active product status.

Limited Channel Equivalent: ISO7231MDW provides 3 channels (2/1 configuration) with identical isolation voltage and data rate but is Obsolete status and not recommended for new designs.

Parameter Comparison

Parameter	ISO7242MDW	ISO7242MDWR	MAX14932AAWE+	MAX14932BAWE+	MAX14932CAWE+	MAX14932DAWE+
Manufacturer	Texas Instruments	Texas Instruments	Analog Devices/Maxim	Analog Devices/Maxim	Analog Devices/Maxim	Analog Devices/Maxim
Isolation Voltage	2500Vrms	2500Vrms	2750Vrms	2750Vrms	2750Vrms	2750Vrms
Number of Channels	4	4	4	4	4	4
Channel Configuration	2/2	2/2	2/2	2/2	2/2	2/2
Data Rate	150Mbps	150Mbps	1Mbps	25Mbps	150Mbps	1Mbps
CMTI (Min)	25kV/µs	25kV/µs	25kV/µs (Typ)	25kV/µs (Typ)	25kV/µs (Typ)	25kV/µs (Typ)
Propagation Delay tpLH (Max)	23ns	23ns	54.1ns	27.5ns	7.5ns	54.1ns
Propagation Delay tpHL (Max)	23ns	23ns	55.3ns	28.8ns	7.4ns	55.3ns
Pulse Width Distortion (Max)	2ns	2ns	4.5ns	2.6ns	1ns	4.5ns
Supply Voltage Range	3.15V ~ 5.5V	3.15V ~ 5.5V	1.71V ~ 5.5V	1.71V ~ 5.5V	1.71V ~ 5.5V	1.71V ~ 5.5V
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC
Product Status	Last Time Buy	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	2 (1 Year)	2 (1 Year)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Direct Replacement (Preferred): ISO7242MDWR is the primary substitute. It maintains all electrical and thermal specifications of the ISO7242MDW while offering Active product status and improved long-term availability. The only difference is packaging format (Cut Tape & Digi-Reel versus Tube), which does not affect electrical performance. This part is ROHS3 compliant and suitable for existing designs requiring minimal qualification effort.

For High-Speed Applications: MAX14932CAWE+ and MAX14932CAWE+T deliver superior propagation delay performance (7.5ns/7.4ns versus 23ns) while maintaining 150Mbps data rate and 2750Vrms isolation. These parts support lower supply voltages (1.71V minimum) and feature MSL 1 rating for unlimited shelf life. Selection between tube and tape & reel packaging depends on production volume requirements.

For Low-Speed, Low-Power Applications: MAX14932AAWE+ and MAX14932DAWE+ operate at 1Mbps data rate with reduced propagation delay sensitivity. These variants are suitable for applications where bandwidth is not critical and lower power consumption is beneficial.

For Mid-Range Data Rates: MAX14932BAWE+ provides 25Mbps performance with balanced propagation delay (27.5ns/28.8ns) and is available in both tube and tape & reel formats.

All MAX14932 variants are Active status with ROHS3 compliance and REACH unaffected certification, ensuring regulatory compliance and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can ISO7242MDWR be used as a direct drop-in replacement for ISO7242MDW?

A: Yes. ISO7242MDWR is electrically and functionally identical to ISO7242MDW. The only difference is packaging format (Cut Tape & Digi-Reel versus Tube). Both parts maintain the same 16-SOIC package dimensions, electrical specifications, and operating characteristics. Packaging format does not affect circuit performance.

Q: What are the key differences between ISO7242MDW and MAX14932 series devices?

A: The primary differences are isolation voltage (2500Vrms versus 2750Vrms), data rate variants (MAX14932 offers 1Mbps, 25Mbps, or 150Mbps options), propagation delay performance, and supply voltage range. MAX14932 devices support lower minimum supply voltage (1.71V versus 3.15V) and feature MSL 1 rating versus MSL 2. All maintain 4-channel, 2/2 configuration and 16-SOIC packaging.

Q: Is ISO7231MDW a suitable substitute?

A: ISO7231MDW is not recommended for new designs. Although it shares isolation voltage and data rate specifications, it provides only 3 channels (2/1 configuration) versus the required 4 channels (2/2), and it is classified as Obsolete. Use only if existing designs specifically require 3-channel operation.

Q: What packaging options are available for substitute parts?

A: ISO7242MDWR is available in Cut Tape & Digi-Reel format. MAX14932 series devices are available in Tube packaging (AAWE+, BAWE+, CAWE+, DAWE+) and Tape & Reel format (AAWE+T, BAWE+T, CAWE+T, DAWE+T). Selection depends on production volume and assembly process requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. ISO7242MDWR and all MAX14932 variants are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Which substitute offers the best propagation delay performance?

A: MAX14932CAWE+ and MAX14932CAWE+T deliver the fastest propagation delay at 7.5ns (tpLH) and 7.4ns (tpHL), compared to 23ns for ISO7242MDW. These parts maintain 150Mbps data rate and are suitable for timing-critical applications.

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