TI AUTOMOTIVE · PART DECISION PAGE
TPS3840-Q1
Low-power single-rail voltage supervisor
Asserts reset below a monitored rail threshold, with manual reset and capacitor-programmed delay. It is neither a regulator nor a watchdog; choose threshold, polarity and open-drain/push-pull behavior by OPN.
5-second verdict
Key specifications
Orderable variants (OPNs)
The GPN is for selection; the full OPN is for ordering. These examples were observed on the verification date, not live stock. Variants may differ in package, temperature, gain/threshold and, for PMICs, NVM/sequencing. Distinguish TA from TJ in the exact datasheet.
| OPN | Package | Temperature | Note |
|---|---|---|---|
| TPS3840DL16DBVRQ1 | SOT-23 (DBV) · 5 pin | -40 to +125°C (TI OPN listing; verify TA/TJ) | Verify exact OPN, temperature definition and revision; not a stock claim. |
| TPS3840DL18DBVRQ1 | SOT-23 (DBV) · 5 pin | -40 to +125°C (TI OPN listing; verify TA/TJ) | Verify exact OPN, temperature definition and revision; not a stock claim. |
| TPS3840DL20DBVRQ1 | SOT-23 (DBV) · 5 pin | -40 to +125°C (TI OPN listing; verify TA/TJ) | Verify exact OPN, temperature definition and revision; not a stock claim. |
| TPS3840DL25DBVRQ1 | SOT-23 (DBV) · 5 pin | -40 to +125°C (TI OPN listing; verify TA/TJ) | Verify exact OPN, temperature definition and revision; not a stock claim. |
| TPS3840DL28DBVRQ1 | SOT-23 (DBV) · 5 pin | -40 to +125°C (TI OPN listing; verify TA/TJ) | Verify exact OPN, temperature definition and revision; not a stock claim. |
| TPS3840DL29DBVRQ1 | SOT-23 (DBV) · 5 pin | -40 to +125°C (TI OPN listing; verify TA/TJ) | Verify exact OPN, temperature definition and revision; not a stock claim. |
| TPS3840DL30DBVRQ1 | SOT-23 (DBV) · 5 pin | -40 to +125°C (TI OPN listing; verify TA/TJ) | Verify exact OPN, temperature definition and revision; not a stock claim. |
| TPS3840DL31DBVRQ1 | SOT-23 (DBV) · 5 pin | -40 to +125°C (TI OPN listing; verify TA/TJ) | Verify exact OPN, temperature definition and revision; not a stock claim. |
Official ordering page: https://www.ti.com/product/TPS3840-Q1
Typical applications
FAQ
Can it detect stalled software?
Voltage reset differs from watchdog supervision. There is no WDI function; software-liveness monitoring needs a separate watchdog or an integrated alternative.
Are DL, PL and PH interchangeable?
No. DL is active-low open-drain, PL active-low push-pull, and PH active-high push-pull. Match the MCU reset logic and pull-up network.
How should I verify the TPS3840-Q1 orderable?
The page lists 8 OPN examples from official material checked on 2026-11-06. Match package, function options and temperature definitions; obtain live price/stock from TI or authorized distributors.
Sources and verification
Related selection and design checks
NuAxi is an independent semiconductor market-intelligence platform and is not affiliated with Texas Instruments. Information is for selection reference only and is not a design, certification or procurement guarantee; verify against TI's official datasheet, ordering page and terms.