Isolation forum - Recent Threads

ISOW3080: ISOW308x: When will production parts be available

Maxime Augustin — Mon, 09 Nov 2026 16:29:25 GMT

Part Number: ISOW3080
Other Parts Discussed in Thread: ISOW3086,

I would like to know when the ISOW3080 and ISOW3086 will enter production. Thank you.

ISO1228: ISO1228 Input Config

Anicia Yu — Fri, 06 Nov 2026 23:10:41 GMT

Part Number: ISO1228

Hi,

I am using the ISO1228 in sourcing mode. During testing I noticed that the device is not detecting the changes in the external switch states. The outputs remain LOW regardless of whether the switches are open or closed. I double cheked my schematic against Section 8.2.2 of the datasheet and noticed that all LEDx pins are connected to AVSS (GND) instead of AVCC. I am not using external LEDs. Only have RPAR and CIN connected to each LEDx.

Section 7.3.2 says that the LEDx pins can be connected directly to GND in sink or source mode.

Section 8.2.2 says that the LEDs are connected to the module field power instead of AVSS.

For a sourcing mode configuration without external LEDs, should the LEDx pins be connected to AVCC or AVSS?

ISOW1044: PCB Layout Specs

marco gestri — Thu, 05 Nov 2026 09:45:36 GMT

Part Number: ISOW1044

Dear Sir, we are using already the ISOW1044DFMR in multiple device configuration but sumetime we get anomalous heating.

We'd like to have more clear information on the PCB layout specification to be satisfied for a correct device working. For example:

1- How close can be positioned 2 or more devices?

2-Can be positioned two device 1 on Top and 1 mirrored on bottom of the same portion of PCB?

3-Can tracks or planes be positioned below the device?

Below please find:

A-An example of 3 devices positioned in line. Is it correct?

B-An example of 4 devices, 2 placed on TOP side and 2 placed on BOT side. Is it correct?

Thank You and best regards

ISO7041: ISO7041 POWER SUPPLY INFORMATION REQUIRED

ANURAG LOKHANDE — Wed, 04 Nov 2026 11:54:45 GMT

Part Number: ISO7041

Hi,

Why VCC1 mentioned in two input range, 1.71V to 1.89V and 2.25V to 5.5V separately?

We have VCC1 at 2.5V and VCC2 at 3.3V, is it OK?

/Anurag

ISO1540: ISO1540 different behavior when flip

Sean Liao (Yu-Sheng) — Wed, 04 Nov 2026 07:30:52 GMT

Part Number: ISO1540
Other Parts Discussed in Thread: ISO1541

Hi sir,

Customer found ISO1540 behavior different when flip.

Between PWR BD & MB, left side I2C VL is ~0V

When Flip, ISO1540 left side I2C VL can't pull down to 0V, it's ~0.6V, but right side VL can pull down to 0v.

Why is that and any thing need to be careful of this device?

Thanks a lot!

ISOW7742: CN04: ISOW7742FDFMR || JPN: PT00194166-R

PING SWEN ANG — Mon, 02 Nov 2026 10:06:14 GMT

Part Number: ISOW7742

Hi TI team,

Please help advise whether this #MPN: ISOW7742FDFMR is belonging to Multi-component IC or Non-multi-component IC.

Kindly help to provide the composition and structure,thanks.

ISOM8600: Fast Response time issue

Allen Chu — Mon, 02 Nov 2026 08:33:44 GMT

Part Number: ISOM8600

Hello,

ISOM8600 fast response time: 10us typical, at if=5mA, Vcc=20V, RL=200R, Cl=50pF.

Is the fast response time of the same device fixed every time under the same conditions?

SN6507-Q1: SN6507 Spice Model Needed

Robert Rodriguez — Sun, 01 Nov 2026 18:08:28 GMT

Part Number: SN6507-Q1
Other Parts Discussed in Thread: SN6507

I am trying to design an isolated supply using the SN6507 and I can't find a spice model I can use in LTspice. Can you provide a spice model so I can try selecting the correct transformer for it?

My input range is 22V - 33V - I would like to produce 7V ideally but I can settle for 10V. The output current is likely to be no more than 400mA.

I see some folks in the forum are able to simulate with Pspice, so I am trying to identify that model so I can do my simulations.

ISOUSB211-Q1: Without External Regulator - USB ISOLATOR REVIEW SCH

venkatesh a — Sat, 31 Oct 2026 16:28:32 GMT

Part Number: ISOUSB211-Q1

Hi Sir.

Please review the attached schedule. Without External Regulator - USB ISOLATOR REVIEW SCH

VBUS is from the HOST USB CONNECTOR, and 3V3X is core supply rail.

Thanks,

Venkatesh.

ISO7740: ISO7740+ISOW7741 for 4KV isolation COM port applicatiion

GARETH OU — Fri, 30 Oct 2026 07:59:39 GMT

Part Number: ISO7740
Other Parts Discussed in Thread: ISOW7741

Could you please help review the following questions regarding the 4 kV isolation requirement?

Is the combination of ISO7740FDWR + ISOW7741DFMR suitable for this application?
Can the existing PCB layout remain unchanged, or is it necessary to increase the clearance to 8 mm or add isolation slots?
What are the differences between passing a 4 kVac / 60-second Hi-Pot test and meeting IEC 60601 2 MOPP requirements?
Does passing a 4 kV Hi-Pot test mean the design meets 2 MOPP requirements? Are there any differences in component selection and cost?

Thank you for your support!

ISO774X.pdf EIO314BRDA00RC.zip

ISOW1044: ISOW1044DFMR Functional Safety Information

Alec Fremier — Thu, 29 Oct 2026 20:59:36 GMT

Part Number: ISOW1044
Other Parts Discussed in Thread: ISO1042-Q1

Do you have Functional Safety Information for ISOW1044DFMR? We are looking for detailed reliability data, specifically FIT rates and failure mode distributions

ISO7830: ISO7830DWW Functional Safety Information

Alec Fremier — Thu, 29 Oct 2026 19:02:25 GMT

Part Number: ISO7830
Other Parts Discussed in Thread: ISO7741-Q1

Do you have Functional Safety Information for ISO7830DWW? We are looking for detailed reliability data, specifically FIT rates and failure mode distributions.

SN6501: Order code

Roman Buehrer — Thu, 29 Oct 2026 14:04:14 GMT

Part Number: SN6501

what is the difference between SN6501DBVR and SN6501DBVRG4?

Thank you

ISO7763-Q1: ISO7763FQDBQRQ1 Recommended Operating Temperature Range

Shihab — Thu, 29 Oct 2026 07:57:04 GMT

Part Number: ISO7763-Q1

Hi,

As per the ordering information in the datasheet, the operating temperature is -40C to 125C.

But, the recommended operating temperature is specified as -55C to 125C and the parameters in the datasheet tables were given to be valid over the recommended operating temperature (-55C to 125C). Can you please clarify if -55C is a typo? if its rated for -55C why its not a EP part?

Thanks,

Shihab.

ISO7231M: customer wants to know the MTBF / FIT value of ISO7231MDWR

Bruce Li — Thu, 29 Oct 2026 07:07:57 GMT

Part Number: ISO7231M

Hi E2E Team,

Good day.

The customer wants to know the MTBF / FIT value of ISO7231MDWR that can't be found on ti.com,

So, Could you please help to provide it ?

Thank you so much.

Snow case No. is CS3663194

Best Regards,

Bruce Li

X1114157@ti.com

Texas instruments | Customer Support Center

ISO1541: I need Radiation Tolerant Components

sandeep kothapally — Wed, 28 Oct 2026 09:57:49 GMT

Part Number: ISO1541

Dear Team,

I am Sandeep, Lead Engineer – Avionics Hardware Design. Please find the attached component list and suggest suitable radiation-tolerant/hardened alternatives for our existing components, along with datasheets and radiation qualification details.

Thank you for your support.

Best regards,
Sandeep

Master BOM_Unique.xlsx

ISO6041: ISO6041 for Intrinsic Safe applications?

Balz Odermatt — Wed, 28 Oct 2026 09:37:54 GMT

Part Number: ISO6041
Other Parts Discussed in Thread: ISO7041

Hello E2E support

Will the ISO6041 be certified for intrinsic safe applications according to IECEx (IEC 60079-0 & IEC 60079-11) and ATEX (EN 60079-0 & EN 60079-11). I'm looking for a faster version of the ISO7041.

Thanks and best regards,

Balz

ISOW7741-Q1: EMC Test Issue on ISOW7741QDFMRQ1 – Request for Filter Recommendation and Immunity Test Reports

Gaurav Mayekar — Tue, 27 Oct 2026 06:06:10 GMT

Part Number: ISOW7741-Q1

Hello,

We are currently facing an issue during EMC testing. Specifically, the output voltage of the ISOW7741QDFMRQ1 shows an overshoot at certain frequencies during the test. Please find the attached test results presentation for your reference.

Based on the attached test results, could you please recommend a suitable output filter circuit for the ISOW7741QDFMRQ1 to mitigate the observed overshoot and improve EMC performance?

Additionally, could you please share the Radiated Immunity (RI) and Conducted Immunity (CI) test reports for the ISOW7741QDFMRQ1? These reports would be very helpful in understanding and analyzing the observed failure behavior during our EMC testing.

We would appreciate any application notes, reference designs, or recommendations related to EMC filtering at the output side of the device.

Thank you for your support.

Best regards,
Gaurav Mayekar

Audi MLBw BJB BCI test H21 HW.pdf

SN6501: Startup Oscillation / Hiccup Issue with SN6501/SN6505B powering TPS76333 LDO

İsmet Şen — Fri, 23 Oct 2026 10:52:30 GMT

Part Number: SN6501
Other Parts Discussed in Thread: SN6505B, TLV755P

Hello TI Support Team,

I am simulating an SN6501 (and alternatively tested with SN6505B) driving a transformer, followed by a TPS76333 LDO to regulate the output voltage (following the typical application circuit recommended in the datasheet).

I am encountering a startup behavior issue under specific conditions:

With SN6501: When the primary input voltage is applied with a slow ramp (taking ~4 ms to reach 3.3V) instead of a step input, the LDO struggles during startup. As the LDO tries to turn on, the input voltage sags, causing the LDO to shut down. The voltage then recovers, and the cycle repeats (hiccup mode) several times before finally stabilizing into normal operation.

With SN6505B: Due to the built-in soft-start feature of the SN6505B, the exact same startup oscillation / hiccup behavior occurs even when the input voltage is applied as a fast step.

Could you please advise on how to resolve this startup hiccup/cycling behavior? Additionally, does this repeated on-off cycling during startup pose any reliability concerns or reduce the lifespan of the TPS76333 LDO?

Thank you for your support.

Best regards,

ISOW6441: Need to know if I should use ISOW6441 for my new upcoming desing.

Piyush Saxena45 — Thu, 22 Oct 2026 22:37:11 GMT

Part Number: ISOW6441
Other Parts Discussed in Thread: ISOW7841

Hi TI Team,

I am working on a design that requires a digital isolator for SPI communication with an energy metering IC. I have been using the ISOW6441 evaluation board for initial testing and was planning to design a custom daughter card using the same IC.

However, I recently noticed that the ISOW6441 is currently unavailable through TI and major distributors such as DigiKey and Mouser.

The ISOW6441 appears to be a more cost-effective solution compared to the ISOW7841, making it an attractive option for my application.

I understand that the ISOW6441 is currently listed as being in the pre-production stage. Could someone from TI please share an estimated timeline for when this device is expected to transition to full production and become more widely available through distributors?

Any information regarding the production schedule and expected availability would be greatly appreciated, as it would help me make an informed decision about the component selection for my design.

Thank you for your time and support.

ISO7721-Q1: ICC1 value at VCC1=5V and VCC2=0V

Shinji Tsuji — Thu, 22 Oct 2026 02:08:37 GMT

Part Number: ISO7721-Q1

Hi team,

Could you please advise how much is the ICC1 when VCC1=5V and VCC2=0V?

regards.

ISO5500EVM: why TI ISO5500 gate drive IC output fails to generate the related output signal when there is input signal on the input side, when both the primary side 5Vcc &

yenwu lo — Wed, 21 Oct 2026 22:39:44 GMT

Part Number: ISO5500EVM

Dear TI tchnical support, good day,

what is the potential reason for TI "ISO5500DWR" gate driver IC output fails to generate the related output signal when there is input signal on the input side, when both the primary side 5Vcc & 2ndry side 15Vcc are present, & the 2ndry side 15V bias is above the UVLO thrshold?

look forward to hearing from you when convenient.

attached please fine the ISO5500DWR related datasheet for your easy reference,

Thank you

yenwu lo ISO5500.PDF

SN6507: SN6507: Is ILIM valid at VCC = 3.3 V?

Min-Sung Kang — Wed, 21 Oct 2026 05:59:03 GMT

Part Number: SN6507

Hi,

I plan to run the SN6507 at VCC = 3.3 V with RILIM = 127 kohm (200 mA typ).

The datasheet specifies ILIM only for 5 V < VCC < 36 V.

Does the current limit work at 3.3 V with similar accuracy? If there is any data, please share it.

Thanks.

ISO1228: nRST pin function

Qi Liu — Tue, 20 Oct 2026 02:12:37 GMT

Part Number: ISO1228

Hi team,

here are a few questions regarding ISO1228:
1) Does activating the nRST pin reset the contents of the filter configuration registers?
2) Is it possible to reset the SPI interface before each access using the nRST pin?
3) Does the function of the nRST pin depend on the nCS pin?
4) Can the BURST_EN pin be connected directly to GND1 if the COMM_SEL pin is connected to VCC1?

Many thanks in advance,
Alex

ISO721M-EP: Request for Clarification on Date Code Discrepancy – ISO721MMDREP

Chulki Ahn — Tue, 20 Oct 2026 00:34:50 GMT

Part Number: ISO721M-EP

We recently purchased and received the ISO721MMDREP component directly from Texas Instruments.

During our incoming inspection, we identified a discrepancy between the date code indicated on the product packaging label and the date codes listed on the Certificate of Conformance (CoC).

The details are as follows:

Packaging Label Date Code: 2409+5
CoC Date Code: 2409+5, 2426
Quantity Received: 10 pcs

The packaging label indicates only 2409+5, whereas the CoC lists two date codes: 2409+5 and 2426.

Could you please clarify the reason for this discrepancy and confirm which date code(s) are applicable to the components we received?

In particular, we would appreciate clarification on whether the CoC includes multiple manufacturing lots or whether the additional date code was included in error.

If the CoC contains an incorrect date code, please provide a revised Certificate of Conformance reflecting the correct information.

We have attached photographs of the packaging label and the CoC for your reference.

Thank you for your assistance. We look forward to your clarification.