ISO7240MDW Digital Isolator Equivalent & Substitute Parts

Part Overview

The ISO7240MDW is a general purpose digital isolator manufactured by Texas Instruments, featuring 2500Vrms isolation, 4 channels, and 150Mbps data rate in a 16-SOIC package. This device is currently in Last Time Buy status, indicating end-of-life production. Alternative components are necessary for new designs and ongoing production requirements where continued availability is critical.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Part Number	ISO7240MDW
Package / Case	16-SOIC (0.295", 7.50mm Width)
Voltage - Isolation	2500Vrms
Number of Channels	4
Channel Type	Unidirectional
Data Rate	150Mbps
Common Mode Transient Immunity (Min)	25kV/µs
Technology	Capacitive Coupling
Voltage - Supply	3.15V ~ 5.5V
Operating Temperature	-40°C ~ 125°C
RoHS Status	ROHS3 Compliant
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment with the following critical parameters:

Primary Compatibility Criteria:

Package / Case: 16-SOIC (0.295", 7.50mm Width) — mechanical and electrical footprint compatibility
Number of Channels: 4 — functional requirement
Channel Type: Unidirectional — signal direction architecture
Voltage - Isolation: 2500Vrms minimum — isolation barrier specification
Common Mode Transient Immunity: 25kV/µs minimum — transient performance
Data Rate: 150Mbps minimum — bandwidth requirement
Mounting Type: Surface Mount — assembly compatibility
RoHS Status: ROHS3 Compliant — regulatory compliance

Substitute Categories:

Category 1: Direct Equivalents (Identical Parameters)

ISO7240MDWR (Texas Instruments) — same manufacturer, same electrical specifications, Active product status

Category 2: Higher Isolation Voltage (2750Vrms)

MAX14930 series (Analog Devices Inc./Maxim Integrated) — exceeds isolation voltage requirement, meets or exceeds all other parameters, multiple data rate variants available

Category 3: Alternative Technology (Magnetic Coupling)

ADUM1400CRWZ-RL (Analog Devices Inc.) — magnetic coupling technology, meets isolation and CMTI requirements, lower data rate (90Mbps) acceptable for reduced bandwidth applications

Parameter Comparison

Parameter	ISO7240MDW	ISO7240MDWR	ADUM1400CRWZ-RL	MAX14930CAWE+	MAX14930CAWE+T
Manufacturer	Texas Instruments	Texas Instruments	Analog Devices Inc.	Analog Devices Inc./Maxim	Analog Devices Inc./Maxim
Package / Case	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC
Voltage - Isolation	2500Vrms	2500Vrms	2500Vrms	2750Vrms	2750Vrms
Number of Channels	4	4	4	4	4
Channel Type	Unidirectional	Unidirectional	Unidirectional	Unidirectional	Unidirectional
Data Rate	150Mbps	150Mbps	90Mbps	150Mbps	150Mbps
CMTI (Min)	25kV/µs	25kV/µs	25kV/µs	25kV/µs (Typ)	25kV/µs (Typ)
Technology	Capacitive Coupling	Capacitive Coupling	Magnetic Coupling	Capacitive Coupling	Capacitive Coupling
Voltage - Supply	3.15V ~ 5.5V	3.15V ~ 5.5V	2.7V ~ 5.5V	1.71V ~ 5.5V	1.71V ~ 5.5V
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 105°C	-40°C ~ 125°C	-40°C ~ 125°C
Product Status	Last Time Buy	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount

Engineering Selection Recommendations

ISO7240MDWR (Texas Instruments) Primary substitute for direct replacement. Identical electrical and mechanical specifications to ISO7240MDW. Active product status ensures long-term availability. ROHS3 compliant. Available in Cut Tape and Digi-Reel packaging with 6413 units in stock.

MAX14930CAWE+ and MAX14930CAWE+T (Analog Devices Inc./Maxim Integrated) Functionally equivalent alternatives with enhanced isolation voltage (2750Vrms). Capacitive coupling technology matches original design approach. 150Mbps data rate meets bandwidth requirements. Extended supply voltage range (1.71V ~ 5.5V) provides additional design flexibility. Active product status. ROHS3 compliant. Available in Tube (MAX14930CAWE+) and Tape & Reel (MAX14930CAWE+T) packaging.

ADUM1400CRWZ-RL (Analog Devices Inc.) Alternative for applications where 90Mbps data rate is acceptable. Magnetic coupling technology provides different EMI characteristics. Meets isolation and CMTI specifications. Extended supply voltage range (2.7V ~ 5.5V). Operating temperature limited to -40°C ~ 105°C. Active product status. ROHS3 compliant. 35832 units in stock.

MAX14930 Series (Lower Data Rate Variants) MAX14930AAWE+, MAX14930AAWE+T, MAX14930BAWE+, MAX14930BAWE+T, MAX14930DAWE+, MAX14930DAWE+T available for applications with reduced bandwidth requirements (1Mbps to 25Mbps). All variants feature 2750Vrms isolation, capacitive coupling, and extended supply voltage range. Active product status. ROHS3 compliant.

Frequently Asked Questions (FAQ)

Q: Can ISO7240MDWR be used as a direct replacement for ISO7240MDW? A: Yes. ISO7240MDWR is the active production equivalent with identical electrical specifications, isolation voltage, data rate, channel configuration, and 16-SOIC package. The only difference is product status (Active vs. Last Time Buy) and packaging options.

Q: What is the key difference between MAX14930CAWE+ and ISO7240MDW? A: MAX14930CAWE+ provides higher isolation voltage (2750Vrms vs. 2500Vrms) and extended supply voltage range (1.71V ~ 5.5V vs. 3.15V ~ 5.5V). Both use capacitive coupling technology, support 150Mbps data rate, and are housed in 16-SOIC packages. The higher isolation voltage makes MAX14930CAWE+ suitable for more demanding isolation applications.

Q: Why does ADUM1400CRWZ-RL have lower data rate than ISO7240MDW? A: ADUM1400CRWZ-RL uses magnetic coupling technology (iCoupler) while ISO7240MDW uses capacitive coupling. The 90Mbps data rate of ADUM1400CRWZ-RL is a characteristic of its magnetic coupling architecture. This device is suitable for applications requiring lower bandwidth but benefits from different EMI performance characteristics.

Q: Are all substitute parts ROHS3 compliant? A: Yes. ISO7240MDWR, ADUM1400CRWZ-RL, and all MAX14930 variants listed are ROHS3 compliant, matching the compliance status of ISO7240MDW.

Q: What packaging options are available for substitutes? A: ISO7240MDWR is available in Cut Tape (CT) and Digi-Reel packaging. MAX14930 variants are available in Tube or Tape & Reel (TR) packaging depending on part number suffix. ADUM1400CRWZ-RL is available in Cut Tape and Digi-Reel packaging. All maintain the same 16-SOIC footprint.

Q: Can MAX14930 variants with lower data rates (1Mbps, 25Mbps) be used in place of ISO7240MDW? A: No. ISO7240MDW requires 150Mbps data rate capability. MAX14930AAWE+, MAX14930BAWE+, and MAX14930DAWE+ variants support only 1Mbps or 25Mbps respectively and are not suitable for this application. Use MAX14930CAWE+ or MAX14930CAWE+T for 150Mbps requirement.

Q: What is the operating temperature range difference between ADUM1400CRWZ-RL and other substitutes? A: ADUM1400CRWZ-RL operates from -40°C to 105°C, while ISO7240MDW, ISO7240MDWR, and MAX14930 variants operate from -40°C to 125°C. Applications requiring operation above 105°C must use alternatives other than ADUM1400CRWZ-RL.

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