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Analog Devices Inc./Maxim Integrated MAX6392KA46+T
- Part No.:
- MAX6392KA46+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6392KA46+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,919
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Product details
Overview
MAX6392KA46+T from Maxim Integrated is a dual-voltage microprocessor supervisory circuit with sequenced active-low reset outputs for multi-rail systems. It monitors VCC (master supply) at 4.63V threshold and RESET IN2 (adjustable down to 625mV) to control power-up/power-down sequencing of primary and secondary system components. Features push-pull RESET1, open-drain RESET2, manual reset input (MR), and guaranteed reset validity down to VCC = 1V.
For engineers reviewing the MAX6392KA46+T datasheet, MAX6392KA46+T pinout, MAX6392KA46+T application, or MAX6392KA46+T equivalent, this device supports precise dual-supply sequencing in industrial controllers, servers, and multivoltage embedded systems where deterministic reset timing and manual override capability are required.
Technical Context
The MAX6392KA46+T implements two independent voltage monitoring paths: a factory-trimmed VCC comparator (4.63V threshold) driving RESET1 with fixed 140ms min timeout, and a 625mV reference-based RESET IN2 comparator enabling adjustable secondary reset thresholds via external resistor divider. RESET2 assertion is triggered by either VCC or RESET IN2 falling below their respective thresholds.
Sequencing logic ensures RESET2 deasserts only after RESET1 during power-up and asserts before RESET1 during power-down. The MR input forces both resets low with 10µs typical delay to RESET1 and 100ns to RESET2, and internal 47kΩ pullup eliminates external biasing. CSRT pin selects fixed (tied to VCC) or capacitor-adjustable (to ground) RESET2 timeout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 4.63V (factory-fixed, ±13mV max tolerance) - sets precise brownout detection point for master supply |
| RESET IN2 Threshold | 625mV (internal reference) - enables monitoring of secondary supplies as low as 625mV via external divider |
| RESET1 Timeout | 140ms minimum - guarantees stable processor initialization before release of primary reset |
| RESET2 Timeout | 140ms minimum (CSRT = VCC) or user-adjustable (CSRT = capacitor) - provides flexible sequencing window for slave subsystems |
| Supply Current | 15µA typical - enables ultra-low-power operation in battery-backed or energy-sensitive applications |
| Reset Validity Range | VCC ≥ 1.0V - ensures reliable reset assertion even during deep brownout conditions |
| MR Input Logic | Active-low with 47kΩ internal pullup - simplifies manual reset implementation without external components |
Pinout & Package
MAX6392KA46+T is housed in an 8-pin SOT23 package (3.00mm × 1.75mm × 1.30mm body, 0.65mm pitch), specified for -40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET IN2 | Secondary supply monitor input | High-impedance node for external resistive divider; sets RESET2 activation threshold down to 625mV |
| 2 - VCC | Main supply and master monitor input | Power source and reference for VTH1 = 4.63V comparator; all resets assert when VCC falls below threshold |
| 3 - CSRT | RESET2 timeout configuration | Connect to VCC for fixed 140ms timeout or to capacitor for user-adjustable delay (tRP2 = 2.08×10⁶ × C) |
| 4 - GND | Analog/digital ground reference | Common return path for all internal comparators, current sources, and output drivers |
| 5 - RESET2 | Secondary active-low reset output | Open-drain output asserted when VCC or RESET IN2 drops below threshold; deasserts only after RESET1 during power-up |
| 6 - R2 | Internal pullup connection for RESET2 | 47kΩ resistor tied internally to RESET2; connect to external VOH rail for level-shifted high-state drive |
| 7 - RESET1 | Primary active-low reset output | Push-pull output (MAX6392 only); provides full-rail drive without external pullup; deasserts first during power-up |
| 8 - MR | Manual reset input | Active-low input with internal 47kΩ pullup to VCC; forces both RESET1 and RESET2 low synchronously |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of master (VCC @ 4.63V) and slave (RESET IN2 @ 625mV ref) rails enables robust multi-supply sequencing |
| Guaranteed reset validity to 1V | Ensures reliable reset assertion during severe brownout events where VCC drops below 1.2V, critical for fail-safe shutdown |
| Sequenced reset timing control | Hardware-enforced ordering: RESET2 always asserts before RESET1 on power-down and deasserts after RESET1 on power-up |
| Integrated manual reset with fast propagation | MR-to-RESET1 delay ≤ 10µs and MR-to-RESET2 delay ≤ 100ns enable immediate, synchronized system reset initiation |
| No external pullup required for RESET1 | Push-pull architecture eliminates need for external pullup resistor, reducing BOM count and layout area vs. open-drain alternatives |
Applications
| Industrial Controllers | Servers / Workstations |
|---|---|
|
Use Scenario: Dual-rail FPGA/CPU power system with 12V/5V/3.3V/1.8V rails requiring controlled startup order and brownout protection. IC Role / Device Role / Timing Role: Primary supervisory IC coordinating reset sequencing between core logic (RESET1) and I/O banks/peripherals (RESET2). Use Value: Prevents latch-up and bus contention by enforcing strict power-up sequence (e.g., 12V → 5V → 3.3V → 1.8V) and ensuring RESET2 remains asserted until RESET1 releases. |
Use Scenario: Redundant power supply monitoring in rack-mounted servers where main and backup 12V rails must be validated before CPU initialization. IC Role / Device Role / Timing Role: Dual-threshold supervisor using VCC for primary 12V rail and RESET IN2 (via divider) for backup 12V rail, with RESET2 asserting on either fault. Use Value: Enables seamless failover: if primary 12V fails, RESET IN2 detects backup rail drop and triggers RESET2 within 10µs while maintaining RESET1 active for safe CPU hold. |
| Printers / MFPs | Set-Top Boxes |
|
Use Scenario: Multivoltage printer controller with motor driver (24V), logic (5V), and memory (3.3V) rails needing coordinated reset during thermal shutdown. IC Role / Device Role / Timing Role: Sequencing supervisor asserting RESET1 (logic/memory) before RESET2 (motor interface) on power-up, and reversing order on shutdown. Use Value: Avoids motor lock-up by ensuring motor drivers are disabled (RESET2 active) before logic resets (RESET1 released), preventing uncontrolled actuator movement. |
Use Scenario: Consumer STB with SoC (1.2V/3.3V), tuner (5V), and USB peripherals (5V) requiring clean boot and ESD-triggered manual reset. IC Role / Device Role / Timing Role: Supervisory hub using MR input for front-panel reset button and dual monitoring for SoC core and peripheral rails. Use Value: MR input provides instant, glitch-immune reset (<100ns skew) across all subsystems, eliminating software hang recovery delays and improving user experience. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6391KA46+T | Open-drain RESET1 (no push-pull), no MR input, includes R1 pullup resistor instead of MR pin | Lacks manual reset and push-pull drive; suitable only where external pullup is acceptable and MR not required | Select MAX6391KA46+T only if manual reset is unnecessary and board layout accommodates external RESET1 pullup |
| TPS3808G33DBVR | Single-supply monitor (3.3V threshold), no secondary input, no sequenced outputs, no MR | Provides basic reset only for single-rail systems; cannot replace dual-monitoring or sequencing functionality | Use TPS3808G33DBVR only for simple 3.3V-only applications where RESET2 sequencing and MR are irrelevant |
Compared with MAX6391KA46+T and TPS3808G33DBVR, the MAX6392KA46+T uniquely delivers sequenced dual-rail supervision with manual reset and push-pull RESET1-enabling compact, reliable power management in complex multivoltage systems without additional logic or discrete components.
Availability
MAX6392KA46+T is available at Aetrix Electronics and suitable for industrial controllers, servers/workstations, and set-top boxes requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.
Supply support for MAX6392KA46+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for demanding industrial, computing, and communications applications.
The MAX6392KA46+T belongs to Maxim's µP supervisory product line, engineered specifically for deterministic dual-voltage sequencing in multirail embedded systems where reliability, low quiescent current, and manual reset capability are essential.
FAQ
What is the factory-set VCC reset threshold voltage for MAX6392KA46+T?
The MAX6392KA46+T has a factory-trimmed VCC reset threshold of 4.63V, with a maximum tolerance of ±13mV. This precise threshold ensures consistent brownout detection for 5V nominal systems and is laser-trimmed during production. The value is permanently fixed and cannot be adjusted in-circuit. All timing and sequencing behavior of MAX6392KA46+T depends on this calibrated reference point.
How does the CSRT pin configure RESET2 timeout behavior in MAX6392KA46+T?
In MAX6392KA46+T, the CSRT pin determines RESET2 timeout mode: tying CSRT to VCC enables a fixed 140ms minimum timeout, while connecting CSRT to a capacitor-to-ground allows user-adjustable delay calculated as tRP2 = 2.08 × 10⁶ × C (seconds). The internal 600nA current source charges the capacitor against a 1.25V reference. This dual-mode flexibility makes MAX6392KA46+T adaptable to diverse sequencing requirements without changing the IC.
Does MAX6392KA46+T support manual reset, and how is it implemented?
Yes, MAX6392KA46+T includes an active-low manual reset input (MR) on pin 8. It features an internal 47kΩ pullup to VCC, so the pin can be left floating or tied to VCC for normal operation. Pulling MR low forces both RESET1 and RESET2 active immediately, with propagation delays of ≤10µs to RESET1 and ≤100ns to RESET2. This hardware reset bypasses voltage monitoring and provides deterministic system recovery independent of supply conditions.
What is the minimum VCC voltage at which MAX6392KA46+T guarantees valid reset operation?
MAX6392KA46+T guarantees valid reset assertion and deassertion functionality down to VCC = 1.0V across the full -40°C to +85°C temperature range. This extended low-voltage operation ensures reliable brownout response even during deep supply sags, making MAX6392KA46+T suitable for applications with marginal power delivery or battery-backed systems where VCC may dip below typical 1.2V minimums.
How does MAX6392KA46+T ensure correct power-up sequencing between RESET1 and RESET2?
MAX6392KA46+T enforces strict hardware sequencing: during power-up, RESET1 deasserts 140ms after VCC exceeds 4.63V, and RESET2 deasserts only after RESET1 has released - regardless of CSRT configuration. During power-down, RESET2 asserts before RESET1 (tRD2 < tRD1), ensuring slave subsystems are held in reset before the master processor. This deterministic ordering is built into the IC's internal state machine and requires no external timing components.
MAX6392KA46+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 4.63V, Adj
- Output:
- Open Drain, Push-Pull
- Reset:
- Active Low
- Reset Timeout:
- 140ms/Adjustable Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6392KA46+T FAQ
1.How can I place an order for MAX6392KA46+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6392KA46+T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX6392KA46+T reliable?
The price and inventory of MAX6392KA46+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6392KA46+T is usually 5 days.
3.What payment methods are accepted for MAX6392KA46+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6392KA46+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6392KA46+T?
MAX6392KA46+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6392KA46+T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX6392KA46+T?
For technical support, including MAX6392KA46+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6392KA46+T requirements.
6.How does Aetrix verify that MAX6392KA46+T is sourced from the original manufacturer or authorized distributors?
All MAX6392KA46+T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX6392KA46+T meets industry standards.
7.What is the process for return or replacement of MAX6392KA46+T?
All MAX6392KA46+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6392KA46+T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX6392KA46+T part is unused and in its original packaging.
Return procedure for MAX6392KA46+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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