MIC803-46D2VM3-TR - 4.63V Processor Supervisor | Microchip
Référence : MIC803-46D2VM3-TR ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $0 | $0,00 |
| 10 | $0 | $0,00 |
| 100 | $0 | $0,00 |
| 500 | $0 | $0,00 |
| 1 000 | $0 | $0,00 |
MIC803-46D2VM3-TR Présentation
A voltage supervisor, also called a supervisory circuit or reset controller, belongs to the power-management IC hierarchy. It monitors a system supply and signals the digital controller when voltage crosses a programmed threshold. This prevents a processor from operating below its valid input range, which can cause unreliable execution, corrupted memory, or unpredictable peripheral behavior.
The key MIC803-46D2VM3-TR features include a 4.63 V nominal reset threshold, ±2.5% threshold tolerance, open-drain active-low reset output, and a 20 ms reset delay. Its three-terminal implementation keeps the circuit compact and suitable for space-constrained embedded equipment. The open-drain output allows the reset node to be pulled up to the local logic supply and permits wired connection with other supervisor signals.
This variant belongs to the MIC803 family, whose part-number encoding identifies different reset thresholds and timing options. The D2 designation is associated with the 20 ms reset delay, while 46 identifies the 4.63 V threshold. Exact accuracy, hysteresis, current consumption, and temperature limits should be confirmed in the Microchip MIC803 datasheet before production release.
Typical uses include monitoring 5 V processor rails, industrial controllers, battery-powered instruments, automotive electronics, IoT equipment, and consumer products. Place the device near the protected supply or logic rail and route the reset trace away from high-current switching nodes. A pull-up resistor is required on the open-drain reset output, and its value should balance rise time, power consumption, and downstream reset-input capacitance.
The primary design trade-off is fixed threshold selection versus adjustable monitoring. This part offers a simple, low-component-count solution for systems with a known rail voltage. For rails requiring programmable thresholds, wider tolerance, different delay, or active-high reset behavior, select a matching supervisor after checking polarity, timing, package pins, and maximum supply voltage.
This page consolidates verified manufacturer and distributor information, identifies family-level replacement risks, and highlights the pull-up, layout, and threshold considerations that are not apparent from a distributor title alone. Datasheet links are provided for complete electrical characteristics and ordering details.
Alternatives de remplacement direct pour MIC803-46D2VM3-TR — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
MIC803-40D2VM3-TR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MIC803-44D3VM3-TR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MIC803-41D4VM3-TR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MIC803-31D2VM3-TR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MIC803-46D2VM3-TR Valeurs maximales et caractéristiques électriques
| Product Type | Single-voltage microprocessor supervisor |
| Reset Threshold | 4.63 V nominal |
| Threshold Tolerance | ±2.5% |
| Supply Input Range | 1.2 V to 5.5 V |
| Reset Delay | 20 ms |
| Reset Output Type | Open-drain |
| Reset Output Polarity | Active-low reset |
| Number of Channels | 1 channel |
| Boîtier | SOT-23-3 |
| Type de montage | Surface mount |
Guide de configuration des broches du MIC803-46D2VM3-TR sot-23-3
Configuration des broches du MIC803-46D2VM3-TR (boîtier sot-23-3). Ce circuit intégré numérique comprend des GPIO, des interfaces de communication (UART, SPI, I2C) et des broches d'alimentation. Consultez la fiche technique du fabricant pour les fonctions alternatives des broches et les options de configuration. Indispensable pour la conception de systèmes embarqués et la conception de circuits imprimés.
Aucune donnée de brochage détaillée disponible pour MIC803-46D2VM3-TR.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
MIC803-46D2VM3-TR convient pour 6 applications: 5 V Microprocessor Brownout Protection, Industrial Control Module, Battery-Powered Embedded Instrument, Automotive Electronic Control Unit, IoT Sensor Hub, Communication Equipment.
5 V Microprocessor Brownout Protection
The MIC803-46D2VM3-TR fits a nominal 5 V processor rail because its 4.63 V threshold is close to the rail value while retaining the 1.2 V to 5.5 V monitoring range. Place it between the protected rail and the processor reset network so the controller is held in reset when the supply becomes invalid. The open-drain output requires a pull-up, and the external reset path must be checked for timing compatibility. Compared with a 2.63 V variant, this higher threshold avoids resetting a 5 V system prematurely during normal startup or moderate load transients.
Recommandé
Industrial Control Module
An industrial controller can use the MIC803-46D2VM3-TR to detect a 5 V rail entering brownout before the main controller begins an unreliable write or peripheral transaction. Its fixed 4.63 V threshold and 20 ms reset delay suit systems whose supply is nominally regulated but may dip during relay, motor, or communications transients. Place the supervisor close to the controller supply entry point and keep the reset trace away from switching nodes. The supervisor does not regulate the rail; it reports loss of valid power so control software or hardware can restart safely.
Recommandé
Battery-Powered Embedded Instrument
The MIC803-46D2VM3-TR can monitor a regulated 5 V output in a battery-powered instrument when the system needs reset indication before the rail falls below a usable level. Its low-component-count SOT-23-3 format preserves board area, while the open-drain output permits a shared reset node with other power-state signals. Use a pull-up to the appropriate logic domain and account for the 20 ms delay in the startup sequence. This device monitors voltage; it does not replace a regulator, battery charger, or fuel-gauge circuit.
Recommandé
Automotive Electronic Control Unit
A 5 V automotive ECU can use the MIC803-46D2VM3-TR as a compact brownout monitor for a controller that must be reset when its supply crosses the selected threshold. The 4.63 V nominal threshold and 20 ms reset delay provide defined monitoring behavior, but automotive use requires confirmation of temperature grade, AEC-Q100 qualification, transient protection, and system-level fault criteria. Route the monitored rail through a protected network and place the supervisor where it can observe the actual supply delivered to the controller. Follow Microchip's layout guidance and validate behavior across load dump, cold crank, and supply-transient conditions.
Recommandé
IoT Sensor Hub
The MIC803-46D2VM3-TR is appropriate in an IoT sensor hub when a central controller runs from a nominal 5 V rail and must recover predictably from supply interruptions. The fixed threshold and delayed reset provide a simple hardware signal independent of firmware initialization, helping prevent sensor corruption or unintended actuator commands during brownout. Place the device near the controller's supply pin and use a short, quiet reset trace. Because the output is open-drain, its pull-up voltage must match the controller's reset domain rather than an unrelated higher-voltage rail.
Recommandé
Communication Equipment
Communication equipment can use the MIC803-46D2VM3-TR to assert reset on a controller when a nominal 5 V logic rail falls below the selected threshold. In a network or transceiver subsystem, preventing continued operation during an invalid supply reduces corrupted frames, register writes, and unintended configuration changes. Place the supervisor on the supply side of the controller's local decoupling and keep its output away from high-current RF and switching paths. The 20 ms reset interval must be coordinated with bootloaders and communications recovery timers so the restart sequence does not create repeated link interruptions.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MIC803-46D2VM3-TR — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MIC803-40D2VM3-TR | MIC803-44D3VM3-TR | MIC803-41D4VM3-TR | MIC803-31D2VM3-TR |
|---|---|---|---|---|---|
| Package | SOT-23-3 | SOT-23-3 - same package | SOT-23-3 - same package | SOT-23-3 - same package | SOT-23-3 - same package |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Reset Threshold | 4.63 V nominal | 4.0 V | 4.4 V | 4.1 V | 3.1 V |
| Timing Code | D2, 20 ms reset delay | D2, 20 ms reset delay | D3 | D4 | D2, 20 ms reset delay |
| Primary Application | Nominal 5 V microprocessor brownout monitoring | Lower-threshold 4.0 V brownout monitoring | 4.4 V brownout monitoring with D3 timing | 4.1 V brownout monitoring with D4 timing | 3.1 V brownout monitoring with D2 timing |
Principaux différenciateurs
- Higher reset threshold within the MIC803 family (vs MIC803-40D2VM3-TR)
- Closer threshold match for 5 V systems (vs MIC803-31D2VM3-TR)
- Defined D2 reset timing (vs MIC803-44D3VM3-TR)
Notes de conception
Place the MIC803-46D2VM3-TR near the supply pin of the circuit it protects, with a short monitored-supply trace and a common ground return. Keep the reset trace away from switching-regulator outputs, motor-control nodes, and high-current return paths. The verified sources identify a SOT-23-3 open-drain supervisor but do not provide a complete layout drawing; follow the manufacturer datasheet and validate the reset path in the final board design.
Use a pull-up resistor from reset to the logic rail that the monitored processor accepts as a valid high level. The resistor must satisfy reset-input leakage and capacitance while limiting current when the supervisor asserts reset low. Check that the reset signal remains within the processor's input limits during startup, shutdown, and supply transitions. A value from the verified data is unavailable, so select it from the MCU reset specification and measured reset-network requirements.
Do not treat a lower-threshold MIC803 variant as an automatic replacement. The target has a 4.63 V threshold and 20 ms D2 delay, while related family parts can differ in both threshold and timing. Before substituting, compare the minimum operating voltage of the protected device, rail tolerance, reset polarity, hysteresis, delay, input range, and exact SOT-23-3 pin assignment. The verified search results identify several family alternatives but do not establish universal cross-brand drop-in equivalence.
Confirm the reset polarity and active state in the system schematic. An open-drain output is pulled low by the supervisor during assertion and returns high only when the external pull-up takes over. If a downstream device uses an active-high reset, an inverter or different supervisor family may be required. Also verify that the 20 ms delay is acceptable for boot timing, watchdog coordination, and communications recovery.
Informations de conformité
The supplied verified data does not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. Confirm these requirements from the current Microchip product documentation and purchasing records.
