Specifications
| Type | Description |
|---|---|
| Part Number | ISO7721 |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Component Type | Other |
| Package Case | D-8 SOIC narrow-body 4.90 mm x 3.91 mm; DWV-8 SOIC wide-body 5.85 mm x 7.50 mm; DW-16 SOIC wide-body 10.30 mm x 7.50 mm |
| Data Rate | 100 Mbps maximum supported data rate |
| Isolation Rating, DW and DWV Packages | 5000 VRMS per UL 1577 |
| Isolation Rating, D Package | 3000 VRMS per UL 1577 |
| Projected Isolation Barrier Lifetime | >30 years at 1.5 kVRMS working voltage |
| Surge Capability | up to 12.8 kV isolation barrier surge capability |
| Common-Mode Transient Immunity | +/-100 kV/us typical |
| Supply Voltage Range | 2.25 V to 5.5 V for VCCI and VCCO |
| Level Translation Range | 2.25 V to 5.5 V across isolation barrier |
| Default Output State, ISO772x | High during input power or signal loss |
| Default Output State, ISO772xF | Low during input power or signal loss |
| Operating Temperature Range | -55°C to +125°C |
| Supply Current | 1.7 mA typical per channel at 1 Mbps |
| Propagation Delay | 11 ns typical |
| ESD Immunity Across Isolation Barrier | +/-8 kV IEC 61000-4-2 contact discharge protection |
| Channel Count | 2 channels |
| Channel Direction, ISO7721 | opposite direction channels |
| Channel Direction, ISO7720 | same direction channels |
| Isolation Barrier Type | double capacitive silicon dioxide insulation barrier |
| Input/Output Logic Compatibility | CMOS or LVCMOS digital I/Os |
| Insulation Rating Type, ISO772x Family | reinforced insulation according to VDE, CSA, TUV and CQC |
| Insulation Rating Type, ISO7721B | basic insulation |
| Package Option, D | D (8), 4.90 mm x 3.91 mm for ISO7720 and ISO7721 |
| Package Option, DWV | DWV (8), 5.85 mm x 7.50 mm for ISO7720 and ISO7721 |
| Package Option, DW | DW (16), 10.30 mm x 7.50 mm for ISO7721F and ISO7721FB |
| Automotive Version | ISO772x-Q1 available |
| Safety Certification | DIN EN IEC 60747-17 (VDE 0884-17) |
| Safety Certification | UL 1577 component recognition program |
| Safety Certification | IEC 61010-1, IEC 62368-1, IEC 60601-1, and GB 4943.1 |
| Datasheet Status | request_only |
Product Overview
The ISO7721 is a Texas Instruments dual-channel digital isolator in the Signal_Chain category. The ISO7721 channel configuration provides two isolated channels in opposite directions, using CMOS or LVCMOS digital I/Os across a double capacitive silicon dioxide insulation barrier.
Key Features
- 100 Mbps maximum supported data rate
- Two isolated channels with opposite-direction ISO7721 configuration
- 2.25 V to 5.5 V VCCI and VCCO range
- 2.25 V to 5.5 V logic level translation
- 5000 VRMS isolation in DW and DWV packages
- 3000 VRMS isolation in D package
- +/-100 kV/us typical common-mode transient immunity
- 11 ns typical propagation delay
- 1.7 mA typical per channel at 1 Mbps
- Double capacitive silicon dioxide insulation barrier
- -55°C to +125°C operating temperature range
- Up to 12.8 kV isolation barrier surge capability
Typical Applications
- Isolated CMOS digital interfaces
- Isolated LVCMOS digital interfaces
- Logic level translation across isolation barrier
- Opposite-direction digital signal isolation
- Reinforced insulation signal paths
- High-CMTI digital isolation designs
- Wide-temperature signal isolation
Procurement Notes
When requesting a quote for ISO7721, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For analog and signal-chain sourcing, supply voltage, bandwidth, accuracy, noise level, package, temperature grade, input/output configuration and qualification requirements should be verified before approval.
FAQ
What type of device is the ISO7721?
The ISO7721 is a Texas Instruments dual-channel digital isolator in the Signal_Chain category. It provides two isolated channels in opposite directions for CMOS or LVCMOS digital I/O interfaces.
What isolation ratings are specified for ISO7721 packages?
The DW and DWV packages are rated for 5000 VRMS isolation per UL 1577. The D package is rated for 3000 VRMS isolation per UL 1577.
What supply voltage range does the ISO7721 support?
The ISO7721 supports a 2.25 V to 5.5 V operating supply range for VCCI and VCCO. The same 2.25 V to 5.5 V range applies to logic level translation across the isolation barrier.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: June 30, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.