STM6321：Reset + Watchdog
The STM6xxx supervisors are self-contained devices which provide microprocessor supervisory functions. A precision voltage reference and comparator monitors the VCCinput for an out-of-tolerance condition. When an invalid VCCcondition occurs, the reset output (RST) is forced low (or high in the case of RST). These devices also offer a watchdog timer (except for STM6322/6825) and/or a push-button (MR) reset input.
These devices are available in a standard 5-pin SOT23 package.
Key Features
- Precision VCC monitoring of 5, 3.3, 3, or 2.5 V power supplies
- RST outputs (active low, push-pull or open drain)
- RST outputs (active high, push-pull)
- Reset pulse width of 1.4 ms, 200 ms and 240 ms (typ.)
- Watchdog timeout period of 1.6 s (typ.)
- Manual reset input (MR )
- Low supply current - 3 μA (typ.)
- GuaranteedRST (RST) assertion down to VCC = 1.0 V
- Operating temperature: –40 to +85 °C (industrial grade)
- RoHS complianceLead-free components are compliant with the RoHS directive
Product Specifications
| Description | Version | Size |
|---|---|---|
| DS4189: 5-pin supervisor with watchdog timer and push-button reset | 13.0 | 662 KB |
Application Notes
| Description | Version | Size |
|---|---|---|
| AN1957: Microprocessor supervisor functions | 2.0 | 577 KB |
| AN1336: Power-fail comparator for NVRAM supervisory devices | 2.0 | 127 KB |
Technical Notes & Articles
| Description | Version | Size |
|---|---|---|
| TN0941: Reset and supervisor ICs: frequently asked questions (FAQ) | 1.0 | 328 KB |
Flyers
| Description | Version | Size |
|---|---|---|
| Resets and supervisors - portfolio overview | 1.0 | 1 MB |
| Watchdog ICs For automotive applications | 487 KB |
Sample & Buy
| Part Number | Package | Packing Type | RST Threshold (V) (typ) | Operating Temperature (°C) (min) | Operating Temperature (°C) (max) | Unit Price (US$) * | Quantity | ECCN (EU) | ECCN (US) | Country of Origin |
|---|---|---|---|---|---|---|---|---|---|---|
| STM6321MAWY6F | SOT23-5L | Tape And Reel | 4.39 | - | - | 0.53 | 1000 | NEC | EAR99 | MALAYSIA |
| STM6321LWY6F | SOT23-5L | Tape And Reel | 4.63 | - | - | 0.53 | 1000 | NEC | EAR99 | MALAYSIA |
| STM6321TWY6F | SOT23-5L | Tape And Reel | 3.08 | - | - | 0.53 | 1000 | NEC | EAR99 | MALAYSIA |
| STM6321MWY6F | SOT23-5L | Tape And Reel | 4.39 | - | - | 0.53 | 1000 | NEC | EAR99 | MALAYSIA |
| STM6321SWY6F | SOT23-5L | Tape And Reel | 2.93 | - | - | 0.53 | 1000 | NEC | EAR99 | MALAYSIA |
| STM6321RWY6F | SOT23-5L | Tape And Reel | 2.63 | - | - | 0.53 | 1000 | NEC | EAR99 | MALAYSIA |
Quality & Reliability
| Part Number | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|
| STM6321MAWY6F | SOT23-5L | Industrial | Ecopack3 | |
| STM6321LWY6F | SOT23-5L | Industrial | Ecopack3 | |
| STM6321TWY6F | SOT23-5L | Industrial | Ecopack3 | |
| STM6321MWY6F | SOT23-5L | Industrial | Ecopack3 | |
| STM6321SWY6F | SOT23-5L | Industrial | Ecopack3 | md_wy-wspc-sot-wspc-23-5_dzwy56va4sl-wspc-(stm6321swy6f3)-wspc-ver2_signed.pdf md_wy-wspc-sot-wspc-23-5_dzwy56va4sl-wspc-(stm6321swy6f3)-wspc-ver2.xml |
| STM6321RWY6F | SOT23-5L | Industrial | Ecopack3 | md_wy-wspc-sot-wspc-23-5_dzwy56va4rl-wspc-(stm6321rwy6f)_wcp_ver2_signed.pdf md_wy-wspc-sot-wspc-23-5_dzwy56va4rl-wspc-(stm6321rwy6f)_wcp_ver2.xml |
- circuit_diagram_11110_thumbnail.png STM6321
- Microprocessor supervisor functions STM805T-S-R
- Power-fail comparator for NVRAM supervisory devices M41T60
- Reset and supervisor ICs: frequently asked questions (FAQ) STM805T-S-R
- Reset and supervisor ICs: frequently asked questions (FAQ) STM805T-S-R
- Reset and supervisor ICs: frequently asked questions (FAQ) STM805T-S-R
- md_wy-wspc-sot-wspc-23-5_dzwy56va4sl-wspc-(stm6321swy6f3)-wspc-ver2_signed.pdf STM6321
- md_wy-wspc-sot-wspc-23-5_dzwy56va4sl-wspc-(stm6321swy6f3)-wspc-ver2.xml STM6321
- md_wy-wspc-sot-wspc-23-5_dzwy56va4rl-wspc-(stm6321rwy6f)_wcp_ver2_signed.pdf STM6321
- md_wy-wspc-sot-wspc-23-5_dzwy56va4rl-wspc-(stm6321rwy6f)_wcp_ver2.xml STM6321
