MPQ6411GS-Z - Windowed Watchdog Timer SOIC-8 | Monolithic Power Systems
Référence : MPQ6411GS-Z ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $1.85 | $1,85 |
| 10 | $1.65 | $16,50 |
| 100 | $1.42 | $142,00 |
| 500 | $1.18 | $590,00 |
| 1 000 | $0.95 | $950,00 |
MPQ6411GS-Z Présentation
A watchdog timer is a dedicated supervisor IC that resets a microcontroller when the firmware becomes unresponsive. The windowed variant goes beyond a simple timeout by requiring a service pulse within an upper-bound window, catching both "stuck-too-long" and "stuck-too-fast" (runaway) firmware faults, which is essential for functional-safety designs targeting ISO 26262 or IEC 61508. The MPQ6411 is a member of the broader supervisory / power-management hierarchy: supervisor -> voltage monitor -> PMIC -> semiconductor.
Key features include programmable watchdog window timing set by an external capacitor on the WDT pin, an open-drain active-low reset output, a MODE pin that selects between long-window and short-window watchdog behavior, internal pull-up on WDI, and a low quiescent current suitable for always-on monitoring. The SOIC-8 (G suffix) package offers standard surface-mount handling with a thermal resistance suitable for the device's low dissipation profile.
Internally, the MPQ6411 combines a precision internal reference, an oscillator-based timing core, and a window-comparator logic block. The WDT capacitor charges and discharges through a controlled current source, generating a triangular waveform whose upper and lower thresholds define the service window. Reset is asserted only when the WDI trigger falls outside that window, providing deterministic fault detection.
Typical applications include automotive ECU supervision, ADAS sensor processors, industrial PLC safety monitors, battery management system (BMS) MCUs, and any safety-critical embedded design where firmware lockups must be caught within a deterministic time bound. The wide operating temperature range further supports under-hood and outdoor industrial deployments.
When designing with this device, place the WDT timing capacitor close to the WDT pin and follow MPS application-note guidance on PCB layout for noise immunity. Verify that the chosen window period is shorter than the maximum fault-tolerant latency required by the system safety analysis.
This page synthesizes MPQ6411 family datasheet parameters, same-brand MPQ6411 drop-in alternatives (AEC1, -33, -P, -Z variants), and practical design notes that complement the manufacturer datasheet with selection guidance.
Alternatives de remplacement direct pour MPQ6411GS-Z — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec MPQ6411GS-Z (même facteur de forme et même empreinte) — différant par Function, Operating Temperature Range, Package / Case, Packaging.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
MPQ6411GS-33-Z
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MPQ6411GS-33-AEC1-Z
✅ Remplacement direct✓ En stock
$0.86 / unité
Voir la fiche technique →MPQ6411GS-AEC1-Z
✅ Remplacement direct✓ En stock
$1.18 / unité
Voir la fiche technique →MPQ6411GS-33-P
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MPQ6411GS-Z Spécifications
| Fonction | Windowed Watchdog Timer Supervisor |
| Number of Channels | 1 |
| Reset Output | Active-Low, Open-Drain |
| Watchdog Type | Windowed (upper + lower bound) |
| WDT Timing | Programmable via external capacitor |
| MODE Pin | Yes (window-select) |
| Boîtier | SOIC-8 |
| Type de montage | Surface Mount |
| Statut RoHS | Compliant |
| AEC-Q100 Qualified (this variant) | No - standard grade |
| Output Topology | Open-Drain RESET |
Configuration des broches de MPQ6411GS-Z
| Broche 1 | GND — Ground |
| Broche 2 | WDT — Watchdog timing capacitor pin |
| Broche 3 | MODE — Window-select mode input |
| Broche 4 | WDI — Watchdog input from MCU |
| Broche 5 | NC — Not connected (per datasheet) |
| Broche 6 | RESET — Active-low open-drain reset output |
| Broche 7 | NC — Not connected (per datasheet) |
| Broche 8 | VCC — Supply voltage |
Applications typiques
MPQ6411GS-Z convient pour 7 applications: Automotive ECU Microcontroller Supervision, Industrial PLC Safety Monitor, Battery Management System (BMS) MCU Supervisor, ADAS Sensor Processor Watchdog, Functional-Safety Embedded Controller, Motor Drive Control MCU Supervisor, HMI Touch Panel Controller Watchdog.
Automotive ECU Microcontroller Supervision
The MPQ6411GS-Z monitors the main MCU in an automotive ECU by requiring service pulses within a programmable window, catching both late and runaway firmware faults that would otherwise hang the controller. Its open-drain active-low RESET output directly drives the MCU reset line, and its wide operating voltage range supports both 3.3V and 5V rails commonly used in body, chassis, and powertrain ECUs. For automotive designs the AEC-Q100 -AEC1 variant should be selected, but the GS-Z provides the same core timing logic for industrial controllers with similar architecture.
Recommandé
Industrial PLC Safety Monitor
The MPQ6411GS-Z provides deterministic firmware-fault detection for industrial PLC safety processors by enforcing a windowed watchdog service cadence. The MODE pin allows the designer to select long or short window behavior, matching the PLC's scan-time profile and fault-tolerant latency budget. The SOIC-8 package is industry-standard for PLC control boards and the open-drain RESET allows wired-OR reset aggregation across multiple supervisor sources for redundant safety architectures compliant with IEC 61508 SIL requirements.
Recommandé
Battery Management System (BMS) MCU Supervisor
In a Battery Management System, the MPQ6411GS-Z supervises the cell-monitoring MCU that runs state-of-charge and state-of-health algorithms. A firmware lockup in the BMS MCU could leave cell balancing, overvoltage, or overtemperature protection inactive, so a windowed watchdog is essential for functional safety. The MPQ6411's low quiescent current preserves battery life in always-on monitoring, and its wide supply range supports direct connection to the 3.3V or 5V low-voltage rail derived from the pack.
Recommandé
ADAS Sensor Processor Watchdog
The MPQ6411GS-Z enforces firmware service discipline on ADAS sensor processors (radar, lidar, camera ISP MCUs) where a runaway code path could feed stale or unsafe perception data into the vehicle decision logic. The windowed timing catches both "no response" and "too frequent response" faults, with the MODE pin selecting the appropriate upper-bound window for the sensor's processing latency. The AEC-Q100 -AEC1 variant is required for production ADAS designs, but the GS-Z provides the same functional architecture for prototyping and pre-compliance boards.
Recommandé
Functional-Safety Embedded Controller
The MPQ6411GS-Z supports functional-safety embedded controllers targeting ISO 26262 ASIL-B or IEC 61508 SIL-2 by providing a hardware-enforced windowed watchdog that is independent of the MCU's own clock and firmware. The external WDT capacitor lets the safety engineer tune the window to a precise fault-tolerant time interval (FTTI) derived from the system safety analysis. The open-drain RESET output can be combined with other supervisor outputs for safety-element-out-of-context (SEooC) integration with diagnostic coverage above 90%.
Recommandé
Motor Drive Control MCU Supervisor
The MPQ6411GS-Z supervises the MCU in industrial motor drives (BLDC, stepper, servo controllers) where a firmware hang could leave power devices in a partially-commutated state and cause catastrophic overcurrent. The windowed watchdog catches both lockup and runaway commutation code, with reset bringing the MCU back to a known safe state before the gate-driver enable signal is reasserted. The wide supply range allows direct operation from the 3.3V auxiliary rail typical of motor-drive control boards.
Recommandé
HMI Touch Panel Controller Watchdog
The MPQ6411GS-Z enforces watchdog service discipline on human-machine interface (HMI) touch-panel controllers used in industrial operator panels, medical monitors, and appliance user interfaces. A firmware lockup in the touch controller would freeze the user interface and could mask safety alarms, so a windowed watchdog with reset assertion is essential. The SOIC-8 package fits standard HMI PCB land patterns and the low quiescent current supports battery-backed HMI designs.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MPQ6411GS-Z — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MPQ6411GS-33-Z | MPQ6411GS-33-AEC1-Z | MPQ6411GS-AEC1-Z | MPQ6411GS-33-P |
|---|---|---|---|---|---|
| Brand | Monolithic Power Systems | Monolithic Power Systems | Monolithic Power Systems | Monolithic Power Systems | Monolithic Power Systems |
| Package | SOIC-8 | SOIC-8 - same | SOIC-8 - same | SOIC-8 - same | SOIC-8 - same |
| Function | Windowed Watchdog Timer | Windowed Watchdog Timer | Windowed Watchdog Timer | Windowed Watchdog Timer | Windowed Watchdog Timer |
| AEC-Q100 Qualified | No | No | Yes | Yes | No |
| Reset Output | Active-Low Open-Drain | Active-Low Open-Drain | Active-Low Open-Drain | Active-Low Open-Drain | Active-Low Open-Drain |
| Timing Variant | Standard | 3.3V optimized | 3.3V optimized + AEC-Q100 | Standard + AEC-Q100 | 3.3V optimized |
| Packaging | Tape & Reel (-Z) | Tape & Reel | Tape & Reel | Tape & Reel | Tube |
Principaux différenciateurs
- Standard-grade variant for cost-sensitive industrial designs (vs MPQ6411GS-33-AEC1-Z)
- Windowed (not simple) watchdog architecture (vs MPQ6411GS-33-AEC1-Z (also windowed, automotive grade))
- External-capacitor window timing for design flexibility (vs MPQ6411GS-33-P (also external capacitor, tube packaging))
Notes de conception
Do not leave the WDT pin floating - the external timing capacitor must be placed directly between WDT and GND as close to the IC as possible, with traces kept short to prevent noise coupling that could falsely trigger or suppress a reset. Use a low-leakage ceramic or film capacitor (NPO/C0G preferred) because capacitor leakage directly shifts the watchdog window timing and may cause the window to drift outside the system safety budget.
Route the WDI (watchdog input) trace away from switching power converter traces and other high-dV/dt signals to prevent capacitive coupling that could inject spurious service pulses. The open-drain RESET output requires an external pull-up resistor; place this pull-up near the MCU reset pin rather than near the MPQ6411 to minimize the RESET trace antenna effect. Decouple VCC with a 0.1uF ceramic capacitor placed within 3mm of the VCC pin per MPS layout guidance.
Verify that the chosen window period (set by the WDT capacitor) is shorter than the Fault-Tolerant Time Interval (FTTI) defined in the system safety analysis - the watchdog must assert reset before the FTTI elapses, otherwise the supervisor cannot prevent a hazardous state. The MODE pin must be tied high or low according to the desired window behavior; leaving it floating can cause intermittent window-mode switching and unpredictable reset behavior in production.
The MPQ6411GS-Z dissipates negligible power at its low quiescent current, so the SOIC-8 thermal resistance (theta_JA approximately 150 C/W for a standard SOIC-8 footprint on a 2-layer board) is not a concern for normal operation. However, when designing for high-temperature automotive under-hood environments, route thermal copper under and around the SOIC-8 land pattern to keep the junction temperature well below the -40C to +125C operating range, especially when sourcing the AEC-Q100 -AEC1 variant.
Informations de conformité
RoHS compliant per Monolithic Power Systems product page. The MPQ6411GS-Z (Z suffix without -AEC1) is NOT AEC-Q100 qualified - for automotive applications, select the MPQ6411GS-33-AEC1-Z variant which carries AEC-Q100 qualification. Standard-grade variant suitable for industrial and consumer applications only.
