ISO7221BDG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments ISO7221BDG4 is a 2-channel CMOS digital isolator supporting data rates up to 5 Mbps across a galvanic isolation barrier. It delivers reliable signal isolation in an 8-pin SOIC package with peak reflow temperature tolerance of 260°C. Suitable for industrial interfaces, motor drives, and medical equipment requiring ground-referenced signal separation.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- ISO7221BDG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of ISO7221BDG4?
- 2-channel galvanic isolation rated for up to 5 Mbps data rate with CMOS logic compatibility
- 8-pin SOIC package with 260°C peak reflow temperature for lead-free soldering processes
- Robust capacitive isolation barrier protecting sensitive control circuitry from high-voltage transients
- Low propagation delay suitable for time-critical industrial communication protocols
What is ISO7221BDG4 used for?
ISO7221BDG4 is used in industrial motor drive gate driver circuits where control signals must cross a high-voltage isolation barrier without electrical coupling. It also suits RS-485 and SPI interface isolation in process control equipment and power converters, preventing ground loops between control and power sections. Medical instrument designers use it to provide patient isolation in diagnostic devices requiring 5 Mbps digital signal throughput.
What are the specifications of ISO7221BDG4?
| YTEOL | 0 |
| Interface IC Type | DIGITAL ISOLATOR |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 3V |
| Supply Voltage-Nom | 3.3V |
| Surface Mount | YES |
| Technology | BICMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| HTS Code | 8542.39.00.01 |
Where can I find the ISO7221BDG4 datasheet?
ISO7221BDG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for ISO7221BDG4?
Compatible alternatives and drop-in replacements for ISO7221BDG4:
Frequently Asked Questions
What maximum data rate does ISO7221BDG4 support across its isolation barrier?
ISO7221BDG4 supports a maximum data rate of 5 Mbps across its 2-channel capacitive isolation barrier. This rate is sufficient for SPI, UART, and custom digital interfaces in industrial motor drive and power converter applications. The CMOS-compatible inputs and outputs allow direct interfacing with 3.3 V and 5 V logic families without additional level translation.
How does ISO7221BDG4 protect control circuits in high-voltage motor drives?
The device uses a capacitive isolation barrier that blocks DC and low-frequency voltage differentials while passing digital signals at up to 5 Mbps. In motor drive applications, where the power stage may switch hundreds of volts, the isolator prevents high-voltage transients from coupling into the 8-pin SOIC control-side circuitry. This protects microcontrollers and DSPs operating at 3.3 V or 5 V from damage caused by inductive switching events.
Can ISO7221BDG4 handle the thermal demands of lead-free reflow soldering?
Yes, ISO7221BDG4 is specified for a peak reflow temperature of 260°C, which meets the standard JEDEC J-STD-020 lead-free soldering profile. The plastic epoxy 8-pin SOIC package and e4 JEDEC-609 classification confirm RoHS-compliant lead-free construction. This allows it to be processed through standard SMT lines without special thermal profiling or low-temperature solder paste.
For which communication interface isolation scenarios is ISO7221BDG4 a practical 2-channel solution?
ISO7221BDG4 is practical for isolating 2-wire interfaces such as unidirectional UART or I2C clock lines where one channel handles transmit and the other handles receive, at data rates up to 5 Mbps. It also fits SPI chip-select and clock isolation, or gate-driver input isolation in half-bridge topologies where 2 isolated channels are sufficient to control high-side and low-side switches within an 8-pin footprint.
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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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