ISO7240MDWR Equivalent & Substitute Parts

Part Overview

The ISO7240MDWR is a general purpose digital isolator manufactured by Texas Instruments, featuring 2500Vrms isolation, 4 channels, and 150Mbps data rate in a 16-SOIC package. The device uses capacitive coupling technology and operates across a supply voltage range of 3.15V to 5.5V with an operating temperature range of -40°C to 125°C. This part is currently in active production status with 6413 units in stock.

Substitute parts are necessary when the ISO7240MDWR becomes unavailable, when alternative isolation technologies offer performance advantages, or when specific packaging or compliance requirements necessitate component alternatives.

Key Parameters

Parameter	ISO7240MDWR
Manufacturer	Texas Instruments
Technology	Capacitive Coupling
Number of Channels	4
Voltage - Isolation	2500Vrms
Common Mode Transient Immunity (Min)	25kV/µs
Data Rate	150Mbps
Propagation Delay tpLH / tpHL (Max)	23ns / 23ns
Voltage - Supply	3.15V ~ 5.5V
Operating Temperature	-40°C ~ 125°C
Package / Case	16-SOIC (0.295", 7.50mm Width)
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Isolation voltage: 2500Vrms minimum
Number of channels: 4 channels required
Channel configuration: Unidirectional, 4 inputs on Side 1, 0 on Side 2
Package type: 16-SOIC surface mount
Operating temperature range: Must support -40°C to 125°C
Supply voltage compatibility: 3.15V to 5.5V overlap required

Substitute parts are grouped into three categories based on isolation technology: capacitive coupling (Texas Instruments), magnetic coupling (Analog Devices), and GMR technology (NVE Corp). Each technology maintains the core electrical specifications while offering different performance characteristics in CMTI, data rate, and propagation delay.

Parameter Comparison

Part Number	Manufacturer	Technology	Channels	Isolation (Vrms)	CMTI (kV/µs)	Data Rate (Mbps)	tpLH/tpHL (ns)	Supply (V)	Temp Range (°C)	Package	Status
ISO7240MDWR	Texas Instruments	Capacitive Coupling	4	2500	25	150	23 / 23	3.15 ~ 5.5	-40 ~ 125	16-SOIC (7.50mm)	Active
ISO7230MDWR	Texas Instruments	Capacitive Coupling	3	2500	25	150	23 / 23	3.15 ~ 5.5	-40 ~ 125	16-SOIC (7.50mm)	Last Time Buy
ADUM1400CRWZ-RL	Analog Devices Inc.	Magnetic Coupling	4	2500	25	90	32 / 32	2.7 ~ 5.5	-40 ~ 105	16-SOIC (7.50mm)	Active
IL 715	NVE Corp/Isolation Products	GMR	4	2500	100	110	15 / 15	3 ~ 5.5	-40 ~ 100	16-SOIC (7.50mm)	Active
IL 715-3	NVE Corp/Isolation Products	GMR	4	2500	100	110	15 / 15	3 ~ 5.5	-40 ~ 100	16-SOIC (3.90mm)	Active
IL 715-3E	NVE Corp/Isolation Products	GMR	4	2500	100	110	15 / 15	3 ~ 5.5	-40 ~ 100	16-SOIC (3.90mm)	Active
IL 715-3ETR7	NVE Corp/Isolation Products	GMR	4	2500	100	110	15 / 15	3 ~ 5.5	-40 ~ 100	16-SOIC (3.90mm)	Active
IL 715ETR13	NVE Corp/Isolation Products	GMR	4	2500	100	110	15 / 15	3 ~ 5.5	-40 ~ 100	16-SOIC (7.50mm)	Active
IL 715T	NVE Corp/Isolation Products	GMR	4	2500	100	110	15 / 15	3 ~ 5.5	-40 ~ 125	16-SOIC (7.50mm)	Active
IL 715T-3E	NVE Corp/Isolation Products	GMR	4	2500	100	110	15 / 15	3 ~ 5.5	-40 ~ 125	16-SOIC (3.90mm)	Active
IL 716	NVE Corp/Isolation Products	GMR	4	2500	100	110	15 / 15	3 ~ 5.5	-40 ~ 100	16-SOIC (7.50mm)	Active

Engineering Selection Recommendations

Direct Substitutes (Same Technology, Same Package Dimensions)

IL 715T and IL 715ETR13 are the closest functional equivalents to ISO7240MDWR. Both maintain the 16-SOIC (0.295", 7.50mm Width) package, support the full -40°C to 125°C operating temperature range, and deliver 2500Vrms isolation with 4 unidirectional channels. IL 715T is RoHS non-compliant, while IL 715ETR13 is ROHS3 compliant. Both use GMR technology, which provides superior CMTI performance (100kV/µs versus 25kV/µs) and faster propagation delay (15ns versus 23ns).

Alternative Technology Substitutes

ADUM1400CRWZ-RL from Analog Devices offers magnetic coupling technology with active product status and ROHS3 compliance. This part maintains 4-channel configuration and 2500Vrms isolation but operates at reduced data rate (90Mbps versus 150Mbps) and higher propagation delay (32ns versus 23ns). The operating temperature range is limited to -40°C to 105°C. Supply voltage range extends to 2.7V minimum, providing broader compatibility.

Channel Configuration Variant

ISO7230MDWR is a 3-channel variant from Texas Instruments using identical capacitive coupling technology. This part is suitable only for applications requiring 3 isolated channels and is designated Last Time Buy status.

Compact Package Alternatives

IL 715-3, IL 715-3E, and IL 715-3ETR7 provide the same electrical specifications as IL 715T but in a narrower 16-SOIC (0.154", 3.90mm Width) package. IL 715-3E and IL 715-3ETR7 are ROHS3 compliant. These variants are appropriate for space-constrained PCB layouts while maintaining GMR technology advantages.

Frequently Asked Questions (FAQ)

Q: Can ISO7230MDWR replace ISO7240MDWR?

A: No. ISO7230MDWR provides only 3 isolated channels versus the 4 channels required by ISO7240MDWR. Channel count is a critical parameter that determines functional compatibility. Additionally, ISO7230MDWR is designated Last Time Buy status, indicating end-of-life production.

Q: What are the key differences between capacitive coupling and GMR technology in these isolators?

A: Capacitive coupling (ISO7240MDWR) and GMR technology (IL 715 series) both achieve 2500Vrms isolation but differ in performance characteristics. GMR technology provides superior common mode transient immunity (100kV/µs versus 25kV/µs) and faster propagation delay (15ns versus 23ns). Capacitive coupling achieves higher data rate (150Mbps versus 110Mbps). Technology selection depends on application requirements for speed versus noise immunity.

Q: Are the IL 715-3 and IL 715T-3E packages interchangeable with ISO7240MDWR?

A: Both IL 715-3 and IL 715T-3E use the narrower 16-SOIC (0.154", 3.90mm Width) package compared to ISO7240MDWR (0.295", 7.50mm Width). While both are 16-pin SOIC packages with identical pin assignments, the physical dimensions differ. PCB layout compatibility must be verified before substitution. The narrower package may not fit existing footprints designed for the wider variant.

Q: Which substitute part offers the best RoHS compliance?

A: IL 715-3E, IL 715-3ETR7, IL 715ETR13, and ADUM1400CRWZ-RL are all ROHS3 compliant. IL 715T and IL 716 are RoHS non-compliant. ISO7240MDWR is ROHS3 compliant. Compliance requirements should be verified against application and regional regulations.

Q: Can ADUM1400CRWZ-RL operate at the full -40°C to 125°C temperature range?

A: No. ADUM1400CRWZ-RL operates from -40°C to 105°C, which is narrower than ISO7240MDWR (-40°C to 125°C). Applications requiring operation above 105°C must use IL 715T, IL 715T-3E, or ISO7240MDWR.

Q: What is the inventory status of substitute parts?

A: IL 715-3E has the highest inventory (8807 units), followed by ADUM1400CRWZ-RL (35832 units). IL 715-3ETR7 has the lowest inventory (658 units). ISO7230MDWR is designated Last Time Buy with 1319 units available. Current inventory levels should be confirmed with the supplier before design commitment.

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