ISO7821DWW Digital Isolator - Equivalent & Substitute Parts

Part Overview

The ISO7821DWW is a general purpose digital isolator manufactured by Texas Instruments, featuring 5700Vrms isolation voltage with 2 channels and 100Mbps data rate capability. This device utilizes capacitive coupling technology and is housed in a 16-SOIC surface mount package. The part maintains active product status with ROHS3 compliance and is currently available with substantial inventory (16,400 pcs in stock). Alternative models may be required when single-channel isolation is sufficient for application requirements or when design constraints necessitate reduced channel count configurations.

Substiute Parts

ISO7821DWW

Texas InstrumentsIn Stock: 16432ISO7821DWW Datasheet

Current PartRFQ

ISO7810DWW

Texas InstrumentsIn Stock: 1028ISO7810DWW Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ISO7821DWW is limited to the ISO7810DWW based on the following allowed parameters:

The ISO7810DWW maintains electrical and mechanical compatibility through identical specifications in isolation voltage (5700Vrms), data rate (100Mbps), common mode transient immunity (100kV/µs), propagation delay characteristics (16ns max for both tpLH and tpHL), pulse width distortion (4.6ns max), rise/fall time (2.4ns typical), supply voltage range (2.25V ~ 5.5V), operating temperature range (-55°C ~ 125°C), package type (16-SOIC), and technology platform (capacitive coupling).

The primary difference is channel configuration: ISO7821DWW provides 2 channels (1 input/1 output per side), while ISO7810DWW provides 1 channel (1 input on side 1, 0 inputs on side 2). This substitution is valid only when single-channel isolation meets application requirements.

Parameter Comparison

Engineering Selection Recommendations

Both ISO7821DWW and ISO7810DWW maintain active product status with identical compliance certifications (ROHS3 Compliant, REACH Unaffected). Selection between these parts depends solely on channel count requirements. The ISO7821DWW is appropriate for applications requiring dual-channel isolation. The ISO7810DWW is appropriate for applications requiring single-channel isolation. Both parts are suitable for industrial and commercial applications within the specified operating temperature range and supply voltage specifications.

Frequently Asked Questions (FAQ)

Q: Can ISO7810DWW replace ISO7821DWW in all applications?

A: No. ISO7810DWW provides only 1 channel of isolation compared to ISO7821DWW's 2 channels. Substitution is valid only when your application requires single-channel isolation.

Q: Are the electrical performance characteristics identical between these parts?

A: Yes. Both parts share identical isolation voltage (5700Vrms), data rate (100Mbps), common mode transient immunity (100kV/µs), propagation delay, pulse width distortion, rise/fall time, supply voltage range, and operating temperature range.

Q: Do both parts use the same package?

A: Yes. Both ISO7821DWW and ISO7810DWW use the 16-SOIC (0.551", 14.00mm Width) surface mount package with identical pin configurations for shared functionality.

Q: What is the moisture sensitivity level for these parts?

A: Both parts have MSL 3 rating with 168 hours maximum floor life before reflow soldering.

Q: Are there any compliance differences between these isolators?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and maintain identical environmental compliance certifications.