ISO7720FDW Digital Isolator - Equivalent & Substitute Parts

Part Overview

The ISO7720FDW is a general purpose digital isolator manufactured by Texas Instruments, featuring 5000Vrms isolation voltage and 2-channel unidirectional configuration. This device utilizes capacitive coupling technology and operates at 100Mbps data rate with 85kV/µs common mode transient immunity. The part is currently in active production status with 1058 units available in stock. Substitute parts become necessary when channel count requirements differ, inventory constraints occur, or design flexibility is needed within compatible electrical and mechanical specifications.

Substiute Parts

ISO7720FDW

Texas InstrumentsIn Stock: 1094ISO7720FDW Datasheet

Current PartRFQ

ISO7710DW

Texas InstrumentsIn Stock: 3179ISO7710DW Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The ISO7710DW qualifies as a parametric equivalent substitute based on the following criteria:

Matching Parameters (Substitution Basis):

• Isolation voltage: 5000Vrms
• Technology: Capacitive coupling
• Data rate: 100Mbps
• Common mode transient immunity: 85kV/µs
• Propagation delay: 16ns (tpLH and tpHL)
• Pulse width distortion: 4.9ns
• Supply voltage range: 2.25V ~ 5.5V
• Operating temperature range: -55°C ~ 125°C
• Package: 16-SOIC (0.295", 7.50mm Width)
• Mounting type: Surface mount
• Compliance: ROHS3 compliant

Differing Parameter:

• Number of channels: ISO7710DW provides 1 channel versus 2 channels on ISO7720FDW

The ISO7710DW is suitable as a substitute when single-channel isolation is required within the same electrical performance envelope and physical footprint.

Parameter Comparison

Engineering Selection Recommendations

ISO7720FDW Selection Criteria:

• Active product status ensures long-term availability and continued manufacturer support
• ROHS3 compliance and REACH unaffected status meet environmental and regulatory requirements
• 2-channel configuration required for dual-signal isolation applications
• Adequate inventory (1058 units) supports production schedules

ISO7710DW Selection Criteria:

• Designated as Last Time Buy, indicating end-of-life phase with limited future availability
• ROHS3 compliance and REACH unaffected status maintain regulatory alignment
• Single-channel configuration suitable for applications requiring only one isolated signal path
• Higher inventory (3088 units) available for immediate procurement
• Identical electrical performance and package specifications ensure pin-compatible operation within single-channel applications

Component selection should prioritize ISO7720FDW for new designs requiring 2-channel isolation. ISO7710DW remains viable for single-channel applications where inventory availability is advantageous, with awareness of Last Time Buy status for long-term planning.

Frequently Asked Questions (FAQ)

Q: Can ISO7710DW replace ISO7720FDW in all applications?

A: No. ISO7710DW provides single-channel isolation while ISO7720FDW provides dual-channel isolation. Substitution is valid only for applications requiring single-channel functionality. Applications designed for 2-channel isolation cannot use ISO7710DW without circuit redesign.

Q: Are the packages physically identical?

A: Yes. Both parts use 16-SOIC (0.295", 7.50mm Width) surface mount packaging with identical pin counts and footprints. PCB layout compatibility is maintained between the two parts.

Q: What is the significance of ISO7710DW's Last Time Buy status?

A: Last Time Buy indicates the manufacturer has announced end-of-life for this part number. Existing inventory will be sold until depletion, after which the part will no longer be available. For applications currently using ISO7710DW, transition planning to ISO7720FDW or alternative solutions is recommended.

Q: Do both parts meet the same isolation and performance specifications?

A: Yes. Both parts meet 5000Vrms isolation voltage, 85kV/µs common mode transient immunity, 100Mbps data rate, and identical propagation delay specifications. Electrical performance is equivalent within their respective channel configurations.

Q: Are there compliance differences between the two parts?

A: No. Both parts carry ROHS3 compliance and REACH unaffected status. Moisture sensitivity level (MSL 2, 1 Year) is identical for both parts.