ISO7840FDWR Equivalent & Substitute Parts

Part Overview

The ISO7840FDWR is a General Purpose Digital Isolator manufactured by Texas Instruments, featuring 5700Vrms isolation voltage and 4 channels with 100Mbps data rate capability. This device utilizes capacitive coupling technology and is designed for applications requiring robust galvanic isolation in industrial and automotive environments. The part is currently in Active product status with ROHS3 compliance and is available in 16-SOIC surface mount packaging. Substitute parts are identified when design requirements allow for reduced channel count or modified electrical characteristics while maintaining core isolation and packaging compatibility.

Substiute Parts

ISO7840FDWR

Texas InstrumentsIn Stock: 725ISO7840FDWR Datasheet

Current PartRFQ

ISO7830FDWR

Texas InstrumentsIn Stock: 1151ISO7830FDWR Datasheet

Parametric EquivalentRFQ

ISO7840DWR

Texas InstrumentsIn Stock: 1313ISO7840DWR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ISO7840FDWR are identified based on the following criteria:

Maintained Parameters (Required for Substitution):

• Isolation voltage: 5700Vrms
• Package type: 16-SOIC (0.295", 7.50mm Width)
• Technology: Capacitive Coupling
• Data rate: 100Mbps
• Supply voltage range: 2.25V ~ 5.5V
• Operating temperature range: -55°C ~ 125°C
• Product status: Active
• RoHS compliance: ROHS3 Compliant

Variable Parameters (Allowed to Differ):

• Number of channels
• Common Mode Transient Immunity (CMTI)
• Packaging format (Tape & Reel vs. Cut Tape)

The ISO7840DWR serves as a direct functional equivalent with identical electrical specifications but differs only in packaging format. The ISO7830FDWR is a parametric equivalent with reduced channel count (3 channels vs. 4) and lower CMTI rating (70kV/µs vs. 100kV/µs), suitable for applications not requiring the full 4-channel configuration or maximum transient immunity.

Parameter Comparison

Engineering Selection Recommendations

ISO7840DWR Selection Criteria: Use ISO7840DWR as a substitute when packaging format flexibility is required. This part maintains identical electrical specifications and channel configuration to the ISO7840FDWR. Both parts are Active status products with ROHS3 compliance. The only distinction is the packaging format: ISO7840DWR is supplied in Cut Tape and Digi-Reel format, while ISO7840FDWR is supplied in Tape & Reel format. Selection between these two should be based on procurement and assembly line requirements.

ISO7830FDWR Selection Criteria: Use ISO7830FDWR as a substitute only when design requirements permit reduction from 4 channels to 3 channels and when the lower Common Mode Transient Immunity rating of 70kV/µs is acceptable for the application. This part is suitable for designs where only 3 isolation channels are needed. Both parts maintain identical isolation voltage, data rate, timing characteristics, and compliance certifications. The ISO7830FDWR offers higher inventory availability (1101 pcs vs. 691 pcs for the main part).

Frequently Asked Questions (FAQ)

Q: Can ISO7840DWR be used as a direct replacement for ISO7840FDWR? A: Yes. ISO7840DWR is electrically and functionally identical to ISO7840FDWR. The only difference is the packaging format (Cut Tape & Digi-Reel vs. Tape & Reel). Both are 16-SOIC surface mount packages with identical pin configurations and electrical specifications.

Q: What are the limitations of using ISO7830FDWR instead of ISO7840FDWR? A: ISO7830FDWR has two key differences: it provides 3 channels instead of 4, and its Common Mode Transient Immunity is rated at 70kV/µs instead of 100kV/µs. Use this substitute only if your design requires no more than 3 isolation channels and can tolerate the lower CMTI specification.

Q: Are all three parts pin-compatible? A: ISO7840FDWR and ISO7840DWR are pin-compatible with identical 16-SOIC packaging. ISO7830FDWR is also in 16-SOIC packaging but has different pin assignments due to the reduced channel count. PCB layout modifications are required when substituting ISO7830FDWR.

Q: Do all substitute parts meet the same compliance requirements? A: Yes. All three parts are Active status products with ROHS3 compliance, REACH Unaffected status, and identical moisture sensitivity levels (MSL 2, 1 Year). All maintain the same operating temperature range of -55°C to 125°C.

Q: Which substitute should I choose for high-noise industrial environments? A: For applications with high common mode transient events, ISO7840FDWR or ISO7840DWR are required, as both provide 100kV/µs CMTI. ISO7830FDWR with 70kV/µs CMTI is not suitable for such environments.