STM6778TWWB6F STMicroelectronics Integrated Circuit (SOT23 (6-Pin)) In Stock
STM6778TWWB6F is a dual ultra-low voltage supervisor with push-button reset from STMicroelectronics, monitoring two supply rails at 3.075 V and 1.665 V reset thresholds in a compact 6-pin SOT-23 package. It includes a manual reset input with configurable delay option, ideal for multi-rail microprocessor and FPGA power sequencing. RoHS e4 compliant, available in lead-free packaging.
- Manufacturer
- STMicroelectronics
- Package
- SOT23 (6-Pin)
- Pin Count
- 6
- Lifecycle
- ACTIVE
- Datasheet
- STM6778TWWB6F Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.8309(MOQ 100)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of STM6778TWWB6F?
- Dual voltage supervisor monitoring 2 supply rails simultaneously with fixed thresholds at 3.075 V and 1.665 V, covering both 3.3 V and 1.8 V rails in a single 6-pin SOT-23 device
- Push-button reset input with programmable reset delay provides glitch-immune manual reset capability for processor boards without discrete RC debounce circuits
- Ultra-low supply current consumption and wide operating voltage range enable always-on supervision in battery-powered IoT and wearable designs
What is STM6778TWWB6F used for?
STM6778TWWB6F is designed for multi-rail embedded systems such as ARM Cortex-M processor boards that require simultaneous supervision of the 3.3 V I/O rail and 1.8 V core supply, asserting reset if either drops below threshold. Its push-button reset with delay option prevents accidental resets in portable industrial handhelds and medical devices where momentary contact bounce is common. The 6-pin SOT-23 package also suits space-constrained IoT gateway designs monitoring a DDR memory rail and processor core rail in parallel.
What are the specifications of STM6778TWWB6F?
| Factory Lead Time | 24Weeks |
| YTEOL | 8 |
| Additional Feature | RESET THRESHOLD VOLTAGES ARE 3.075V AND 1.665V; MANUAL RESET INPUT |
| Adjustable Threshold | YES |
| Analog IC - Other Type | VOLTAGE SUPERVISOR/RESET IC |
| JESD-30 Code | R-PDSO-G6 |
| JESD-609 Code | e4 |
| Number of Channels | 1 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSOP6,.11,37 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 0.035mA |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 0.8V |
| Supply Voltage-Nom (Vsup) | 3.3V |
| Surface Mount | YES |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Threshold Voltage-Nom | +3.075,1.665V |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | SOT23 (6-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Malaysia |
Where can I find the STM6778TWWB6F datasheet?
STM6778TWWB6F Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for STM6778TWWB6F?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
Why does STM6778TWWB6F monitor two separate threshold voltages and which supply rails do they correspond to?
STM6778TWWB6F's two reset thresholds—3.075 V and 1.665 V—correspond to a 3.3 V I/O supply rail and a 1.8 V core or memory supply rail respectively. Monitoring both rails simultaneously in a single 6-pin SOT-23 device ensures reset is asserted whenever either rail droops more than 7% below its nominal voltage, preventing the processor from executing code with an under-powered I/O or core domain. This dual supervision removes the need for 2 separate single-channel supervisors, reducing BOM count by at least 1 component.
How does the push-button reset with delay in STM6778TWWB6F improve reliability over a simple RC reset circuit?
The integrated push-button reset input includes a glitch filter that requires the button to be held for a programmable delay (set by an external capacitor) before asserting reset, typically from 20 ms to several hundred milliseconds. A simple RC circuit provides no such immunity: a 10 ms contact bounce can cause spurious reset events in handheld devices. STM6778TWWB6F's approach ensures the system only resets on intentional button presses longer than the programmed delay, with a reset pulse width of at least 150 ms to allow processor boot completion.
In a battery-powered IoT design, what is the typical quiescent current of STM6778TWWB6F and how does it affect battery life?
STM6778TWWB6F consumes a typical quiescent current of under 10 µA during normal supervision. In a design with a 2,000 mAh AA-cell battery pack powering always-on supervision, this translates to a self-discharge contribution of less than 0.3 µAh per day solely from the supervisor, extending battery life negligibly versus typical MCU sleep currents of 1 µA to 10 µA. The ultra-low current draw makes it practical for always-on power-good monitoring in coin-cell IoT nodes operating for 5 years or more.
For a design with a 24-week lead time on STM6778TWWB6F, what alternative sourcing strategy minimises supply chain risk?
With a 24-week factory lead time, designers should place blanket purchase orders covering at least 26 weeks of anticipated demand to avoid production stoppages. Alternatively, the STM6778 family includes pin-compatible variants with different threshold combinations—evaluating a second threshold option (such as 2.93 V and 1.575 V for 3.0 V and 1.8 V systems) from the same family widens sourcing options within the 6-pin SOT-23 footprint. Keeping a buffer stock of 500 to 1,000 units covers roughly 8 to 12 weeks of a typical embedded-product production run without expedite fees.
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Why Buy from FindMyChip
About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 100+ | $1.4200 | $142.00 |
| 250+ | $1.4100 | $352.50 |
| 500+ | $1.4000 | $700.00 |
| 1000+ | $1.1900 | $1190.00 |
| 3000+ | $0.8400 | $2520.00 |
| 12000+ | $0.8309 | $9970.32 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
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