ISO7821LLDWR . Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments ISO7821LLDWR is a 2-channel, 100 Mbps digital isolator in a 16-pin wide-body SOIC package with reinforced isolation up to 5 kV peak. It provides bidirectional signal isolation for SPI, UART, and GPIO interfaces in industrial and medical applications. Available from authorized distributors with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- ISO7821LLDWR . Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 2-channel digital isolation at up to 100 Mbps data rate enables high-speed SPI and UART signal crossing across isolation barriers
- Reinforced isolation rated up to 5 kV peak voltage protects low-voltage MCU circuitry from high-voltage transients in industrial systems
- 16-pin wide SOIC (WSOIC) package provides wider creepage and clearance distances mandated by IEC 60747-17 reinforced isolation standards
Applications
The ISO7821LLDWR is designed for industrial motor drives, solar inverters, and medical instrumentation where high-speed digital signals must cross a galvanic isolation barrier safely. Its 100 Mbps throughput supports real-time SPI communication between a microcontroller and an isolated power stage gate driver at update rates up to 10 MHz. In medical devices, the reinforced 5 kV peak isolation rating meets patient-protection requirements in equipment directly connected to mains power.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the maximum data rate of the ISO7821LLDWR, and which serial protocols can it isolate?
The ISO7821LLDWR supports a maximum data rate of 100 Mbps per channel, making it capable of isolating SPI at up to 50 MHz clock, UART at up to 100 Mbps baud, and general-purpose GPIO signals with sub-10 ns propagation delay. The 2-channel configuration allows full-duplex UART TX and RX isolation, or simultaneous isolation of 2 independent digital control signals in an industrial system.
How does the reinforced isolation rating of the ISO7821LLDWR protect industrial equipment from voltage transients?
The ISO7821LLDWR is rated for reinforced isolation up to 5 kV peak voltage across its barrier, complying with IEC 60747-17 requirements for reinforced insulation. This protects the low-voltage MCU side from common-mode transients generated by motor switching events or lightning surges on the high-voltage side. In variable-frequency drives switching 600 V rails, the isolator prevents dangerous voltages from propagating to the control PCB, safeguarding both the circuit and the operator.
For an industrial motor-drive design, when is the ISO7821LLDWR a more appropriate choice than a standard 2.5 kV isolator?
When the motor drive operates from a 400 V AC mains supply and the design must meet IEC 61010-1 reinforced insulation requirements for hazardous-voltage equipment, a standard 2.5 kV basic isolator provides insufficient margin. The ISO7821LLDWR's 5 kV peak reinforced rating gives a 2× safety margin above the system's transient overvoltage category, satisfying both safety agency certification requirements and providing additional headroom for surge immunity in harsh factory environments.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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