Part A
LTC6820HMS#TRPBF
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6571 Stückzahl
- Package
- MSOP-16
- Series
- Schnittstelle für Spezialisiert
Replacement verdict
Compatible functional replacement candidate
The LTC6820HMS#TRPBF and LTC6820IMS#3ZZTRPBF are functionally equivalent isoSPI transceivers sharing identical core electrical specifications, pinout, and package footprint. The primary distinction is the operating temperature grade, with the H-grade supporting a wider industrial temperature range than the I-grade. Both parts are suitable for drop-in substitution in applications where the respective temperature grade meets the system requirements.
Function
High match
Package Type
High match
Pin Configuration
High match
Operating Temperature
Validation required
Parts at a glance
Part B
LTC6820IMS#3ZZTRPBF
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6272 Stückzahl
- Package
- MSOP-16
- Series
- Schnittstelle für Spezialisiert
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | LTC6820HMS#TRPBF | LTC6820IMS#3ZZTRPBF | Why it matters |
|---|---|---|---|
| Function | Isolated SPI communication interface | Isolated SPI communication interface | Both devices perform the same core function, so they are functionally interchangeable at the system level. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Identical operating voltage range ensures either part can be used in the same power rail design. |
| Data Rate | Up to 1 Mbps | Up to 1 Mbps | Matching maximum data rate means no change in SPI bus throughput when substituting parts. |
| Isolation Voltage | 2500 V RMS | 2500 V RMS | Same isolation rating ensures equivalent safety and noise immunity in isolated interfaces. |
| Operating Temperature Range | -40 °C to 125 °C | -40 °C to 85 °C | The H-grade part supports a wider temperature range, making it suitable for harsher environments than the I-grade part. |
| Package / Pin Count | 16-Lead MSOP | 16-Lead MSOP | Same package and pin count allow drop-in replacement without PCB layout changes. |
| Temperature Grade | H-grade (high temperature) | I-grade (industrial) | The grade determines guaranteed performance limits; H-grade is specified over a wider range than I-grade. |
| Interface Type | SPI to isolated SPI | SPI to isolated SPI | Identical interface type confirms both parts connect to the same host and isolated bus architectures. |
| RoHS Compliance | RoHS compliant | RoHS compliant | Both meet environmental regulations, so no compliance difference affects substitution. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | LTC6820HMS#TRPBF | LTC6820IMS#3ZZTRPBF |
|---|---|---|
| Series | isoSPI | Automotive, isoSPI |
| Part Status | Active | Active |
| Applications | Isolated Communications Interface | Isolated Communications Interface |
| Interface | SPI | SPI |
| Voltage - Supply | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
Frequently asked questions
What are the LTC6820HMS#TRPBF and LTC6820IMS#3ZZTRPBF?
Both are isolated communications interface ICs from Analog Devices (Linear Technology) that implement the physical layer for SPI over a single twisted pair, enabling isolated SPI communication. The LTC6820HMS#TRPBF is specified over the -40°C to 125°C operating temperature range, while the LTC6820IMS#3ZZTRPBF is specified over the -40°C to 85°C operating temperature range.
What is the difference between the LTC6820HMS#TRPBF and LTC6820IMS#3ZZTRPBF?
The primary difference is the specified operating temperature range: the H-grade (LTC6820HMS#TRPBF) is rated for -40°C to 125°C, while the I-grade (LTC6820IMS#3ZZTRPBF) is rated for -40°C to 85°C. Both are functionally identical and share the same electrical specifications at 25°C.
Are the LTC6820HMS#TRPBF and LTC6820IMS#3ZZTRPBF pin-compatible?
Yes. Both devices are offered in the same MSOP-16 package with identical pin assignments, so they are pin-compatible and can use the same PCB land pattern.
Can the LTC6820IMS#3ZZTRPBF be used as a drop-in replacement for the LTC6820HMS#TRPBF?
Functionally yes, but only if the application's ambient temperature does not exceed 85°C. The I-grade device is rated to 85°C, so it cannot replace the H-grade device in applications requiring operation up to 125°C.
What is the maximum data rate supported by these devices?
Both the LTC6820HMS#TRPBF and LTC6820IMS#3ZZTRPBF support SPI clock rates up to 1 Mbps over the isolated twisted-pair interface.
What supply voltage do the LTC6820HMS#TRPBF and LTC6820IMS#3ZZTRPBF require?
Both devices operate from a single 3.0 V to 5.5 V supply on VDD, with a separate logic supply pin (VDDL) that allows interfacing to 1.7 V to 5.5 V logic levels.
Do these devices provide galvanic isolation?
The LTC6820 itself does not provide galvanic isolation; it drives and receives a differential signal over a twisted pair. Isolation is achieved externally by using a transformer or capacitive isolation barrier in the signal path, as shown in the manufacturer's typical application circuits.
What is the difference in packaging designation between #TRPBF and #3ZZTRPBF?
The #TRPBF suffix indicates tape-and-reel packaging with lead-free (Pb-free) finish. The #3ZZTRPBF suffix also indicates tape-and-reel packaging with lead-free finish, with the additional "3ZZ" code specifying the specific reel or packing quantity per Analog Devices' ordering information.