Logic forum - Recent Threads

TXB0304: TXB0304 and TXB0604 spec difference or improvement

Vincent Chiu — Fri, 15 May 2026 04:02:14 GMT

Part Number: TXB0304

Hi TI experts

We design SPI level shifter with TXB0304, however, the infoamtion from TI web site recommend TXB0604 for drop-in placement.

May we know any spec difference/improvement between TXB0304 and TXB0604? Any errata or bug we met and change solution to TXB0604 then fixed?

Regards,

Vincent

RE: TXB0304: TXB0304 and TXB0604 spec difference or improvement

Jack Guan — Fri, 15 May 2026 22:35:28 GMT

Hi Vincent,

Please note the mentioned TXB0304, TXB0604, and TXU0304 are all P2P so they can be dropped in replaced with one another. Can you provide more details on how it isn't feasible in your setup? Is it the specific direction of the 4 signal lanes not routed similar to TXU0304 direction?

Similar to Clemens' response, the TXB0604 supports longer distance driving and higher data rate support then the TXB0304, hence the suggestion to migrate to the TXB060x.

Regards,

Jack

RE: SN74LVC1G373: schematic review request

pragash sangaran78 — Fri, 15 May 2026 19:46:50 GMT

My email to 'logic-apps-dallas@list.ti.com' couldn't be delivered.

SN74LVC1G373: schematic review request

pragash sangaran78 — Sun, 10 May 2026 22:54:21 GMT

Part Number: SN74LVC1G373

i would like help to review my schematic for SN74LVC1G373YZPR. i prefer review via PM or email. thanks.

LSF0102-Q1: Issue with UART Communication Using LSF0102-Q1 – BLE_TX to MCU_RXD Translation Not Working

Vishal Dakre — Fri, 15 May 2026 17:11:15 GMT

Part Number: LSF0102-Q1

Hello TI Team,

I am currently using the LSF0102-Q1 as a level shifter for UART communication between a 5V microcontroller and a 3.3V TI BLE wireless MCU (CC2745), as shown in the attached schematic.

I am facing the following issue:

During transmission from the microcontroller to the BLE IC, UART communication is working properly. We are able to observe pulses at MCU_TXD and BLE_RX, and the BLE IC is receiving the data correctly.
However, during transmission from the BLE IC to the microcontroller, UART communication is not working. We are able to observe pulses at BLE_TX, but no pulses are observed at MCU_RXD. Instead, MCU_RXD remains at a constant voltage of approximately 3.5V, whereas it is expected to go to 5V.

We have attached the schematic for your reference.

Could you please guide me on this issue and let me know if I am missing anything in the schematic or if there are any specific design recommendations for UART implementation using the LSF0102-Q1?

RE: LSF0102-Q1: Issue with UART Communication Using LSF0102-Q1 – BLE_TX to MCU_RXD Translation Not Working

Jack Guan — Fri, 15 May 2026 18:47:09 GMT

Hi Vishal,

The schematic is missing external pull-ups on the outputs on B-side. If this is not feasible, there is also the TXU0202 that is better suited for this application.

Regards,

Jack

CD74AC14: Part failure

John Vu — Thu, 14 May 2026 13:20:45 GMT

Part Number: CD74AC14

Submitting via E2E based on direction provided in TI Case CPR261146332.

RE: CD74AC14: Part failure

John Vu — Fri, 15 May 2026 16:43:43 GMT

Are you available at 2:30 pm EST (today). What email that we can invite to? e2e.ti.com/.../summary_2D00_CPR261146332.pdf e2e.ti.com/.../TI-_2600_-ARROW-835_2D00_6057_2D00_024-AFD_2D00_65x0-_2800_U43_2900_.pdf e2e.ti.com/.../CER127177-.pdf

TPLD2001: Regarding the PUP of the ACMP in the TPLD2001

Kyohei — Fri, 15 May 2026 10:20:53 GMT

Part Number: TPLD2001

Hi team,

When using the ACMP in the TPLD2001, I believe that the ACMP is turned ON by applying a signal to the PUP pin. Are there any High/Low threshold levels for the PUP input?
The device will be operated with Vcc = 5V.

Best regards,

Kyohei

RE: TXB0304: TXB0304 and TXB0604 spec difference or improvement

Vincent Chiu — Fri, 15 May 2026 07:27:38 GMT

Hi Clemens

We design the TXB0304 and replace TXB0604 is feasible, but cahnge to TXU0304 is not feasible.

Therefore, we want to check the spec difference/improvement between TXB0304 and TXB0604.

Regards,

Vincent

RE: TXB0304: TXB0304 and TXB0604 spec difference or improvement

Clemens Ladisch — Fri, 15 May 2026 07:06:21 GMT

The TXB0604 supports higher data rates, but supports smaller supply voltage ranges.

For SPI, the recommended translator is the TXU0304.

TXS0108E: TXS0108EPWR Marking

Jack Barret — Tue, 12 May 2026 09:39:34 GMT

Part Number: TXS0108E

Hello!

Could you please tell me if line 4 of the TXS0108EPWR marking can vary between the same batch?
I know that line 4 is the batch tracking code, but could this code be different on chips from the same batch?
I've provided photos below.

Thank you!

Best ragards,
Jack Barret

RE: TXS0108E: TXS0108EPWR Marking

Jack Barret — Fri, 15 May 2026 06:42:51 GMT

Hi Jack!

Thank you.

Best ragards,
Jack Barret

SN74HC595: Body Mark

Valeria Torrero — Thu, 14 May 2026 22:41:59 GMT

Part Number: SN74HC595

Hello,

I would like to know what means the body mark on our IC received: SN74HC595DR

TI 63A50YM

HC595

RE: SN74HC595: Body Mark

Albert Xu1 — Fri, 15 May 2026 00:04:14 GMT

Hi Valeria,

The part marking at the top is just our internal date codes, This is used for internal tracking and we do not share the information regarding this.

SN74AHC1G00-Q1: PCB BMW 2212609-00 // HTN SN74AHC1G00QDCKRQ1

Emanuela Chis — Thu, 14 May 2026 11:52:47 GMT

Part Number: SN74AHC1G00-Q1

Hello,

could you please support providing us below details about SN74AHC1G00QDCKRQ1:

Assembly location (country/region)

Assembly location (city, country/region)

Fab location (country/region)

Fab location (city, country/region)

COO - NOT Shipping to China, HK or USA

RE: SN74AHC1G00-Q1: PCB BMW 2212609-00 // HTN SN74AHC1G00QDCKRQ1

Albert Xu1 — Fri, 15 May 2026 00:01:10 GMT

Hi Emanuela,

Please see info below:

Assembly: China, Malaysia, Philippines, Thailand

Fab: Richardson, TX, USA

COO: Variable

SN74AHC1G08: Part Marking

Abhilash B — Thu, 14 May 2026 15:46:12 GMT

Part Number: SN74AHC1G08

Hi Team,

The client wanted to get item SN74AHC1G08DBVR.
According to the data sheet, the following marking options are : A083, A08G, A08J, A08L, A08S
The item the client received is marked as 3BVF which they cannot use.

Please help us whether the part markings are correct or Not ?

Part Number : SN74AHC1G08DBVR

RE: SN74AHC1G08: Part Marking

Albert Xu1 — Thu, 14 May 2026 23:53:27 GMT

Hi Abhilash,

This is a valid part marking that is listed in the datasheet.

RE: CD74AC14: Part failure

Albert Xu1 — Thu, 14 May 2026 23:46:27 GMT

Hi John,

I do not have access to the case number. Can you explain the issue you are seeing?

RE: SN74LVC1G373: schematic review request

pragash sangaran78 — Thu, 14 May 2026 22:04:46 GMT

thanks. will try again.

RE: TXS0108E: Internal pull-ups info

Jack Guan — Thu, 14 May 2026 19:39:19 GMT

Hi Alberto,

Thanks for your inquiry. Clemens' comments are applicable and please help to provide more info on use case to help narrow down recommendations.

Regards,

Jack

TXS0108E: Internal pull-ups info

Alberto E. — Thu, 14 May 2026 12:48:17 GMT

Part Number: TXS0108E

Hi there!

I'm analyzing the TXS0108ERGY to use in a project that needs level adaptation from 5V to 3,6V. I've seen in the datasheet this device has internal pull-ups in all the lines, connected to their respective supply levels and I have some doubts regarding this features. Is it recommended to use this resistors to set the default states of signals that need a specific value, such as enable pins of another devices? For example, If am driving a RESET signal, that needs a pull-up, can this internal pull-up used instead of placing an external one for time constrained applications?

And... in case I place an external pull-up resistor, the equivalent resistor should be considered to be the parallel between the external resistor and the internal one, depending if the signal is driving high or low (as in section 7.3.5 of datahseet indicates the Rpua and Rpub changes depending if the signal is high or low).

And 2... what about if I need to place an external pull-down in a signal? Can this device handle that situation, or do I need another level translator without the internal pull-up to handle that default pull-down pins?

Thanks!!

RE: TXS0108E: TXS0108EPWR Marking

Jack Guan — Thu, 14 May 2026 19:06:28 GMT

Hi Jack,

I checked with our packaging team, this is normal and expected.

Regards,

Jack

RE: SN74LVC1G373: schematic review request

Albert Xu1 — Thu, 14 May 2026 17:45:00 GMT

Hi Pragash,

Please double check the email you are sending to. You are missing the "dallas" part.