ISO722D Digital Isolator Equivalent & Substitute Parts

Part Overview

The ISO722D is a general purpose digital isolator manufactured by Texas Instruments, featuring 2500Vrms isolation voltage, 1 channel unidirectional configuration, and 100Mbps data rate in an 8-SOIC package. This component is classified as Last Time Buy, indicating limited future availability. Identifying equivalent and substitute parts ensures design continuity and supply chain flexibility for applications requiring capacitive coupling isolation technology with comparable electrical and mechanical specifications.

Substiute Parts

ISO722D

Texas InstrumentsIn Stock: 5496ISO722D Datasheet

Current PartRFQ

ISO722DR

Texas InstrumentsIn Stock: 2253ISO722DR Datasheet

MFR RecommendedRFQ

ISO721D

Texas InstrumentsIn Stock: 5413ISO721D Datasheet

Parametric EquivalentRFQ

SI8610AB-B-ISR

Skyworks Solutions Inc.In Stock: 4240SI8610AB-B-ISR Datasheet

MFR RecommendedRFQ

SI8710CD-B-ISR

Skyworks Solutions Inc.In Stock: 8568SI8710CD-B-ISR Datasheet

MFR RecommendedRFQ

SI8715BC-A-IS

Skyworks Solutions Inc.In Stock: 5337SI8715BC-A-IS Datasheet

MFR RecommendedRFQ

SI8720BC-A-IS

Skyworks Solutions Inc.In Stock: 897SI8720BC-A-IS Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ISO722D are classified based on the following substitution criteria:

Primary Substitution Criteria (Mandatory Match):

• Capacitive coupling technology
• Single channel, unidirectional configuration
• 8-SOIC (0.154", 3.90mm Width) package footprint
• Operating temperature range: -40°C ~ 125°C
• Surface mount mounting type
• ROHS3 compliance

Secondary Compatibility Parameters (Allowable Variation):

• Isolation voltage: 2500Vrms or higher
• Data rate: 100Mbps or higher
• Common mode transient immunity: 25kV/µs or higher
• Supply voltage range: must encompass 3V ~ 5.5V minimum
• Propagation delay: 24ns or lower for equivalent performance

Packaging Consideration: The ISO722D is supplied in Tube packaging. Substitute parts may be available in alternative packaging formats (Tape & Reel) without affecting functional compatibility, provided the component footprint and electrical specifications remain within allowable parameters.

Parameter Comparison

Engineering Selection Recommendations

Direct Replacement (Identical Electrical Performance): ISO722DR is the primary substitute for ISO722D. Both parts share identical electrical specifications (2500Vrms isolation, 100Mbps data rate, 25kV/µs CMTI, 24ns propagation delay) and 8-SOIC package footprint. ISO722DR maintains Active product status, ensuring long-term availability. The only difference is packaging format (Tape & Reel vs. Tube), which does not affect functional compatibility.

Parametric Equivalent (Texas Instruments Family): ISO721D provides parametric equivalence with identical electrical performance and 8-SOIC package. Both ISO722D and ISO721D are Last Time Buy products; however, ISO721D offers an alternative within the same manufacturer family for applications where supply from either part number is acceptable.

Cross-Manufacturer Alternatives (Skyworks Solutions): SI8715BC-A-IS and SI8720BC-A-IS are functionally compatible alternatives with enhanced specifications. Both feature higher isolation voltage (3750Vrms vs. 2500Vrms), higher data rate (15Mbps vs. 100Mbps), superior CMTI (35kV/µs vs. 25kV/µs), and Active product status. These parts maintain 8-SOIC package compatibility and Tube packaging format. The trade-off is increased propagation delay (50ns vs. 24ns).

SI8610AB-B-ISR maintains 2500Vrms isolation and 8-SOIC package but operates at reduced data rate (1Mbps) and extended propagation delay (35ns). This part is suitable only for low-speed applications where timing margins are not critical.

SI8710CD-B-ISR is not recommended as a direct substitute due to package incompatibility (6-SOIC vs. 8-SOIC), despite offering higher isolation voltage (5000Vrms).

Product Status Consideration: For new designs or long-term production, ISO722DR (Active status) is the recommended choice. For existing designs currently using ISO722D, ISO721D provides continuity within the Last Time Buy window before both parts reach end-of-life.

Frequently Asked Questions (FAQ)

Q: Can ISO722DR be used as a direct replacement for ISO722D? A: Yes. ISO722DR is electrically identical to ISO722D with matching isolation voltage (2500Vrms), data rate (100Mbps), CMTI (25kV/µs), and propagation delay (24ns). Both use 8-SOIC package. The only difference is packaging format (Tape & Reel vs. Tube), which does not affect circuit performance. ISO722DR is recommended for new designs due to Active product status.

Q: What is the difference between ISO722D and ISO721D? A: Both parts are electrically identical with 2500Vrms isolation, 100Mbps data rate, and 8-SOIC package. The primary difference is the base product number (ISO722 vs. ISO721). Both are Last Time Buy products. Selection between them depends on existing design documentation and supply availability.

Q: Can SI8715BC-A-IS or SI8720BC-A-IS replace ISO722D in existing designs? A: These Skyworks parts are pin-compatible alternatives with 8-SOIC package and Tube packaging. However, they feature different electrical characteristics: higher isolation voltage (3750Vrms), higher data rate (15Mbps), and higher CMTI (35kV/µs). Propagation delay is longer (50ns vs. 24ns). Use these parts only if your application tolerates increased propagation delay and does not require the exact 100Mbps data rate of the ISO722D.

Q: Why is SI8610AB-B-ISR listed as a substitute if it has lower data rate? A: SI8610AB-B-ISR maintains 2500Vrms isolation and 8-SOIC package compatibility. However, its 1Mbps data rate is significantly lower than ISO722D's 100Mbps. This part is suitable only for low-speed isolation applications where bandwidth is not a constraint. It is not recommended for designs requiring 100Mbps performance.

Q: Is SI8710CD-B-ISR compatible with ISO722D? A: No. Although SI8710CD-B-ISR offers higher isolation voltage (5000Vrms) and Active product status, it uses a 6-SOIC package (0.295", 7.50mm Width) instead of the 8-SOIC package (0.154", 3.90mm Width) required by ISO722D. Package incompatibility prevents direct substitution without PCB redesign.

Q: What packaging formats are available for ISO722D substitutes? A: ISO722D is supplied in Tube packaging. ISO722DR is available in Tape & Reel format. SI8715BC-A-IS and SI8720BC-A-IS are available in Tube format. Packaging format does not affect electrical performance; selection depends on manufacturing process requirements and inventory management preferences.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts (ISO722DR, ISO721D, SI8610AB-B-ISR, SI8710CD-B-ISR, SI8715BC-A-IS, SI8720BC-A-IS) are ROHS3 compliant and REACH unaffected, matching the compliance status of ISO722D.

Q: What is the moisture sensitivity level difference between ISO722D and Skyworks alternatives? A: ISO722D has MSL 1 (Unlimited), indicating no moisture sensitivity constraints. SI8610AB-B-ISR has MSL 2A (4 Weeks), and SI8715BC-A-IS and SI8720BC-A-IS have MSL 3 (168 Hours). Higher MSL ratings require stricter moisture control during storage and handling. This is a secondary consideration for component selection.