MAX6468US46D3+T - 4.625V MPU Supervisor w/ Manual Reset | Maxim
Teilenummer: MAX6468US46D3+T ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $1.64 | $1,64 |
| 10 | $1.49 | $14,90 |
| 100 | $1.18 | $118,00 |
| 500 | $1.01 | $505,00 |
| 1.000 | $0.88 | $880,00 |
MAX6468US46D3+T Übersicht
A supervisor (or voltage supervisor / reset IC) is a power-management device whose job is to keep a microcontroller or DSP in a known safe state during power-up, power-down, and brown-out events. It belongs to the broader category hierarchy supervisor -> power-supply support circuit -> power-management IC -> semiconductor. The MAX6468 family combines a precision voltage reference, a comparator, a reset output stage (push-pull totem-pole, active-low), and a debounced manual-reset input that delivers a guaranteed single one-shot pulse even if the MR input is held low for an extended period.
Key features include a ±2.5% reset threshold accuracy over temperature, a quiescent supply current of typically 5 µA, an open-drain/push-pull reset output (this variant is push-pull), and a wide operating temperature range of -40 °C to +125 °C for automotive-grade deployment. The SOT-143-4 footprint is among the smallest 4-pin supervisory packages available, ideal for space-constrained portable designs.
The MAX6468 architecture uses a precision bandgap reference, comparator, and timing generator on a single die. The internal one-shot ensures that even a momentary or bouncing manual-reset press produces exactly one clean reset pulse of the specified width, simplifying firmware debounce and eliminating missed-reset edge cases common with simpler supervisor ICs.
Typical applications include µP/µC brown-out protection in embedded systems, microcontroller reset sequencing in battery-powered portables, automotive ECU and body-controller supervisors, FPGA/CPLD configuration-supervision, and any system requiring a guaranteed reset pulse after power stabilization. The MAX6468 is also widely used in point-of-sale terminals, industrial PLCs, and consumer electronics where clean power-up behavior is mandatory.
When designing with this device, ensure that the VCC ramp rate and decoupling meet the datasheet's minimum requirements. Because the reset output is push-pull (totem-pole), no external pull-up resistor is required - simplifying BOM count. The MR input is debounced internally, but a 1 nF to 10 nF capacitor may be added in noisy environments for additional immunity.
This page synthesizes distributor pricing from Mouser, DigiKey, and Heisener, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in-Alternativen für MAX6468US46D3+T – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit MAX6468US46D3+T (gleiche Bauform und Footprint) – abweichend in Function, Manual Reset Input, Operating Temperature Range, Reset Output Type.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
MAX6468US46D3+
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MAX6468US29D3+T
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MAX6467US46D3+T
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
CAT811LTBI-GT3
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MAX6315US31D3-T
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MAX6468US46D3+T Technische Daten
| Funktion | Microprocessor Supervisory Reset Circuit |
| Number of Voltages Monitored | 1 |
| Reset Threshold (VCC nominal) | 4.625 V |
| Reset Output Type | Push-Pull, Active-Low, Totem Pole |
| Reset Timeout (min) | 150 ms |
| Manual Reset Input | Yes (Edge-Triggered, One-Shot) |
| Operating Supply Voltage Range | 1.0 V to 5.0 V |
| Quiescent Supply Current (typ) | 5 µA |
| Betriebstemperaturbereich | -40 °C to +125 °C |
| Gehäuse / Bauform | SOT-143-4 (TO-253-4) |
| Montageart | Surface Mount |
| Anzahl der Pins | 4 |
| RoHS-Status | Compliant |
| Lead-Free | Yes |
| Temperature Grade | Automotive |
MAX6468US46D3+T Pin-Konfiguration
| Pin 1 | GND — Ground reference |
| Pin 2 | MR — Manual Reset input (active-low, edge-triggered, one-shot) |
| Pin 3 | RESET — Active-low reset output, push-pull (totem-pole) |
| Pin 4 | VCC — Supply voltage input, 1.0V to 5.0V |
Typische Anwendungen
MAX6468US46D3+T ist geeignet für 6 Anwendungs: Microcontroller Brown-Out Protection, Automotive ECU Reset Supervision, Battery-Powered Portable Devices, FPGA/CPLD Configuration Supervision, Industrial PLC and Controller Reset, Point-of-Sale and Consumer Electronics.
Microcontroller Brown-Out Protection
The MAX6468US46D3+T is purpose-built for monitoring a 4.625V microcontroller supply rail and asserting reset during brown-out events. Its factory-trimmed 4.625V threshold matches typical 5V µC VCC rails at 92.5% of nominal, allowing safe operation down to a regulated 4.75V minus tolerance. The 150ms minimum reset timeout ensures the µC has ample time to complete its oscillator stabilization and reset-vector fetch before code execution begins. The 5µA quiescent current is negligible compared to the µC's run current, so the supervisor can remain permanently powered in battery-backed systems.
Empfohlen
Automotive ECU Reset Supervision
With its -40°C to +125°C automotive temperature grade and 4.625V threshold, the MAX6468US46D3+T is well suited for automotive ECU, body controller, and infotainment applications. The edge-triggered one-shot manual reset prevents false reset triggers from switch bounce in cabin-mounted reset buttons, while the SOT-143-4 package fits easily behind the dashboard. The push-pull output directly drives the ECU's reset pin without external pull-ups, reducing BOM and PCB area. AEC-Q100 automotive qualification is supported within the family for OEM designs.
Empfohlen
Battery-Powered Portable Devices
The MAX6468US46D3+T's 5µA quiescent current makes it ideal for handheld and battery-powered portable products where sleep-mode power budget is critical. At 5µA, the supervisor itself adds less than 0.02% to a typical 30mA sleep current budget. The wide 1.0V to 5.0V supply range covers both 1S Li-ion and 3V coin-cell architectures. The SOT-143-4 footprint occupies less than 5mm² of PCB area, making it ideal for wearables, medical patches, and IoT sensor nodes where board space is at a premium.
Empfohlen
FPGA/CPLD Configuration Supervision
FPGAs and CPLDs require their configuration download to complete cleanly before I/O becomes active, making a stable reset signal essential. The MAX6468US46D3+T holds its RESET output low until VCC exceeds 4.625V and the 150ms timeout has elapsed, giving the FPGA's internal POR circuit time to complete configuration. The push-pull output drives the FPGA's active-low configuration or INIT pin directly. The supervisor's automotive-grade temperature range supports industrial and outdoor FPGA deployments including traffic signal controllers and solar inverters.
Empfohlen
Industrial PLC and Controller Reset
In industrial PLC, motor controller, and process-control applications, the MAX6468US46D3+T supervises the 5V logic supply and ensures the controller exits reset only after power is stable. Its -40°C to +125°C operating range handles factory-floor temperature extremes including unheated enclosures. The one-shot manual reset feature simplifies operator-panel reset button debounce - a single button press generates exactly one clean reset pulse to the CPU, regardless of contact bounce duration. This prevents multi-reset events that could leave PLC state machines in undefined conditions.
Empfohlen
Point-of-Sale and Consumer Electronics
POS terminals, payment processors, and consumer electronics require bulletproof reset behavior to prevent bricking during power events. The MAX6468US46D3+T's guaranteed 150ms reset pulse and clean push-pull output ensure the application processor boots from a known state every time. The SOT-143-4 package fits alongside secure-element ICs and touchscreen controllers in space-constrained POS form factors. Its 5µA quiescent current contributes minimally to standby power budgets, helping designs meet Energy Star and similar standby-power regulations.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für MAX6468US46D3+T – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | MAX6468US46D3+ | MAX6468US29D3+T | MAX6467US46D3+T | CAT811LTBI-GT3 | MAX6315US31D3-T |
|---|---|---|---|---|---|---|
| Brand | Analog Devices (Maxim) | Analog Devices (Maxim) | Analog Devices (Maxim) | Analog Devices (Maxim) | onsemi | Analog Devices (Maxim) |
| Package | SOT-143-4 | SOT-143-4 (same) | SOT-143-4 (same) | SOT-143-4 (same) | SOT-143-4 (same) | SOT-143-4 (same) |
| Reset Threshold | 4.625 V | 4.625 V | 2.93 V | 4.625 V | 4.63 V | 3.08 V |
| Reset Timeout (min) | 150 ms | 150 ms | 150 ms | 150 ms | 140 ms | 150 ms |
| Manual Reset Input | Yes (edge-triggered, one-shot) | Yes (edge-triggered, one-shot) | Yes (edge-triggered, one-shot) | No MR input | Yes (standard, not one-shot) | Yes |
| Reset Output Type | Push-Pull, Active-Low | Push-Pull, Active-Low | Push-Pull, Active-Low | Push-Pull, Active-Low | Push-Pull, Active-Low | Push-Pull, Active-Low |
| Operating Temperature | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +85 °C | -40 °C to +125 °C |
Wichtigste Unterscheidungsmerkmale
- Edge-triggered one-shot manual reset eliminates switch-bounce multi-reset bugs (vs. CAT811LTBI-GT3 (onsemi))
- Wide automotive temperature range -40°C to +125°C (vs. CAT811LTBI-GT3 (onsemi))
- Lower quiescent current for battery-powered designs (vs. MAX6315US31D3-T)
Designhinweise
Decouple VCC (pin 4) with a 0.1µF ceramic capacitor placed within 3mm of the IC. The supervisor draws 5µA quiescent, but during the 150ms reset pulse the output transitions draw transient current up to several milliamps - inadequate decoupling causes VCC droop that can re-trigger reset. Estimated: at 1mA transient for 100ns edge, a 0.1µF cap limits droop to ~1mV, well below threshold hysteresis.
SOT-143 pin numbering is non-obvious: pin 1 is GND, pin 2 is MR, pin 3 is RESET, pin 4 is VCC (opposite-side pin). A common mistake is to assume the same pinout as a SOIC-4 or to mirror the layout. Always re-check the datasheet land pattern before PCB fabrication - a mirrored footprint will silently produce a non-functional board that appears correctly assembled.
Route the MR (manual reset) trace away from noisy signals such as switching node traces or clock lines. Although the MAX6468's one-shot MR is internally debounced, a 1nF to 10nF capacitor on the MR pin to GND adds additional noise immunity in electrically noisy environments such as motor-control PCBs. Keep the trace under 25mm if possible to minimize antenna pickup.
Because the RESET output is push-pull (totem-pole), it can drive capacitive loads up to ~50pF directly without external buffering. For longer PCB traces to the MCU's reset pin, place a 10kΩ series resistor at the supervisor output to dampen transmission-line ringing. The active drive strength is sufficient for typical MCU reset inputs but not for long cables or connectors.
Compliance-Informationen
RoHS and REACH compliance confirmed by Maxim product page (now under Analog Devices). AEC-Q100 explicit qualification status to be confirmed with ADI directly - part is rated to +125°C automotive temperature grade per Partstack listing.
