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Analog Devices Inc./Maxim Integrated MAX6358SVUT+T
- Part No.:
- MAX6358SVUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6358SVUT+T.pdf
- Description:
- IC SUPERVISOR MPU SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:12,500
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Product details
Overview
MAX6358SVUT+T from Maxim Integrated is a dual-voltage microprocessor supervisory circuit with open-drain active-low reset output, 2.93V VCC1 threshold, and 1.58V VCC2 threshold, featuring integrated watchdog timer (46.4s startup / 2.9s normal timeout) and debounced manual-reset input. It operates over -40°C to +85°C in 6-pin SOT23 and ensures valid RESET as long as either supply remains ≥1.0V - used in multivoltage embedded systems requiring reliable power-on and fault detection.
For engineers reviewing the MAX6358SVUT+T datasheet, MAX6358SVUT+T pinout, MAX6358SVUT+T application, or MAX6358SVUT+T equivalent, key selection criteria include dual-supply monitoring thresholds, watchdog timing modes, open-drain reset drive capability, supply current (20µA typ), and guaranteed operation down to VCC = 1.0V.
Technical Context
The MAX6358SVUT+T implements independent precision voltage comparators for VCC1 and VCC2, asserting reset when either supply drops below its factory-set threshold (2.93V / 1.58V). Its watchdog timer features two distinct timeout modes: a 46.4s startup period after power-up or reset, followed by a 2.9s normal timeout triggered by missing WDI edges.
Reset assertion is guaranteed while either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V, and the open-drain RST output supports external pull-up for flexible logic-level interfacing. The debounced MR input accepts TTL/CMOS-compatible signals and holds reset active during and for the timeout period after release.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.93V ±0.05V at +25°C; monitors primary supply with 20ppm/°C tempco for stable trip point across temperature. |
| VCC2 Threshold | 1.58V ±0.03V at +25°C; enables low-voltage rail supervision (e.g., 1.8V core or I/O domains). |
| Watchdog Timeout | 46.4s startup mode / 2.9s normal mode; accommodates lengthy boot sequences then enforces rapid fault response. |
| Supply Current | 20µA typical; minimizes quiescent load on battery-backed or energy-constrained systems. |
| Reset Pulse Width | 100ms minimum; meets μP reset hold-time requirements without external timing components. |
| Operating Temp | -40°C to +85°C; qualified for industrial and extended-temperature embedded applications. |
| Reset Valid Down To | VCC1 ≥ 1.0V or VCC2 ≥ 1.0V; ensures deterministic reset behavior during brownout or partial power loss. |
Pinout & Package
MAX6358SVUT+T is housed in a RoHS-compliant 6-pin SOT23 package (U6-1 outline, 90-0175 land pattern), with 1.0mm pitch, 2.9mm × 1.6mm footprint, and thermal pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low open-drain reset output | Drives low during fault; requires external pull-up to define logic-high level and voltage domain compatibility. |
| 2 - GND | Ground reference | Common return path for VCC1, VCC2, MR, WDI, and RST; must be low-impedance for noise immunity. |
| 3 - MR | Debounced manual-reset input | Pull low to force reset; internal 32–100kΩ pull-up allows direct connection to VCC1 if unused. |
| 4 - VCC2 | Secondary supply input & monitor | Supplies device when > VCC1; monitored at 1.58V threshold; must remain ≤ VCC1 to avoid overstress. |
| 5 - WDI | Watchdog timer input | Rising/falling edge clears timer; unconnected disables watchdog; VIH = 0.65×VCC1, VIL = 0.3×VCC1. |
| 6 - VCC1 | Primary supply input & monitor | Supplies device when > VCC2; monitored at 2.93V threshold; powers internal circuitry and MR pull-up. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneously supervises two rails (2.93V/1.58V) with no external components - eliminates discrete resistor dividers or dual ICs. |
| Two-mode watchdog timer | 46.4s startup timeout enables full system initialization; 2.9s normal timeout detects runtime lockups within sub-3-second window. |
| Guaranteed reset validity to 1.0V | Ensures clean, predictable reset assertion even during deep brownout - critical for nonvolatile memory write integrity. |
| 20µA ultra-low supply current | Reduces standby power in always-on subsystems; enables multi-year battery life in portable equipment. |
| Power-supply transient immunity | Rejects short-duration VCC dips (<100ns at 100mV overdrive); prevents false resets from switching noise or ESD events. |
Applications
| Industrial PLC Controllers | Portable Medical Devices |
|---|---|
|
Use Scenario: Programmable logic controllers operating in harsh environments with fluctuating 24V DC input and regulated 3.3V/1.8V internal rails. IC Role / Device Role / Timing Role: Dual-rail supervisor monitors main 3.3V logic supply and 1.8V FPGA core voltage; asserts open-drain RST to halt execution on undervoltage. Use Value: Prevents corrupted firmware execution during brownout; 46.4s watchdog startup accommodates FPGA configuration time before enabling runtime monitoring. |
Use Scenario: Battery-powered glucose meters with dual Li-ion cell input (6–8.4V) and buck-converted 3.3V/1.5V rails. IC Role / Device Role / Timing Role: Supervises 3.3V MCU supply and 1.5V sensor analog front-end; uses MR for user-initiated self-test reset. Use Value: 20µA quiescent current extends battery life; 1.58V VCC2 threshold matches low-voltage sensor rail; open-drain RST interfaces cleanly with mixed-voltage MCU I/O. |
| Automotive Body Control Modules | Network Edge Gateways |
|
Use Scenario: 12V automotive systems with LDO-regulated 5V/3.3V supplies powering microcontrollers and CAN transceivers. IC Role / Device Role / Timing Role: Monitors 3.3V MCU supply (2.93V threshold) and 5V CAN interface rail (1.58V threshold scaled via external divider). Use Value: Reset pulse width ≥100ms satisfies automotive microcontroller reset timing; transient immunity prevents false resets from load-dump spikes. |
Use Scenario: Industrial IoT gateways with PoE-powered 48V input, 12V intermediate rail, and 3.3V/1.2V SoC supplies. IC Role / Device Role / Timing Role: Supervises 3.3V SoC I/O supply and 1.2V core supply (using 1.58V threshold with scaling); WDI tied to SoC GPIO for software watchdog. Use Value: Open-drain RST allows level-shifting to 1.8V logic; 2.9s watchdog timeout detects stalled Linux kernel threads without requiring hardware timer extensions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6358TVUT+T | VCC1 threshold = 3.08V (vs. 2.93V); identical pinout, watchdog, and package. | Suitable where primary supply is 3.3V ±5% instead of 3.3V ±10%; tighter margin against 3.0V brownout. | Select MAX6358TVUT+T if system VCC1 nominal is 3.3V with tighter regulation; otherwise MAX6358SVUT+T provides wider margin. |
| TPS3808G33DBVR | Single-supply (3.3V only), no watchdog timer, push-pull RST, 1.6µA IQ, SOT23-5. | Lacks dual-rail monitoring and watchdog; suited for cost-sensitive single-rail applications without runtime fault detection. | Choose TPS3808G33DBVR only when supervising one rail and watchdog functionality is unnecessary; not a functional substitute for MAX6358SVUT+T. |
Compared with MAX6358TVUT+T, MAX6358SVUT+T offers lower VCC1 trip point for enhanced brownout sensitivity on marginal 3.3V rails; compared with TPS3808G33DBVR, it adds dual-supply monitoring and watchdog - essential for safety-critical multivoltage systems.
Availability
MAX6358SVUT+T is available at Aetrix Electronics and suitable for industrial control systems, portable medical instrumentation, automotive body electronics, and network edge gateways requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6358SVUT+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 high-performance analog, mixed-signal, and power-management ICs for industrial, computing, communications, and consumer applications.
The MAX6351–MAX6360 family delivers precision dual- and triple-voltage supervision with integrated watchdog timers, targeting multirail embedded systems where reliability, low power, and compact size are critical.
FAQ
What is the exact VCC1 and VCC2 threshold voltage for MAX6358SVUT+T?
The MAX6358SVUT+T has a factory-set VCC1 threshold of 2.93V (±0.05V at +25°C) and VCC2 threshold of 1.58V (±0.03V at +25°C), both specified over -40°C to +85°C with 20ppm/°C tempco. These values are fixed per the "SV" suffix in the ordering code and do not require external calibration.
Does MAX6358SVUT+T provide a push-pull or open-drain reset output?
MAX6358SVUT+T provides an active-low open-drain RST output (Pin 1), requiring an external pull-up resistor to define the high-state voltage level. This configuration enables level translation and wired-OR reset bus sharing - unlike push-pull variants such as MAX6359SVUT+T.
How does the watchdog timer in MAX6358SVUT+T operate during system startup?
The MAX6358SVUT+T watchdog timer initiates a 46.4s startup timeout after power-on or any reset event, allowing ample time for firmware initialization. Once the first valid WDI edge occurs or the startup period expires, it switches to 2.9s normal timeout mode - ensuring rapid fault detection during steady-state operation.
Can MAX6358SVUT+T monitor a third voltage rail?
No, MAX6358SVUT+T monitors only two supplies (VCC1 and VCC2). Third-rail monitoring is exclusive to MAX6355/MAX6356/MAX6357 variants, which feature the RSTIN input. For three-rail supervision, consider MAX6356SVUT+T (same thresholds, added RSTIN).
What is the minimum supply voltage required for MAX6358SVUT+T to assert a valid reset?
MAX6358SVUT+T guarantees valid reset assertion as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V. Below these levels, the internal circuitry cannot maintain defined logic states - so system design must ensure at least one supply remains above 1.0V during brownout conditions.
MAX6358SVUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.58V, 2.93V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6358SVUT+T FAQ
1.How can I place an order for MAX6358SVUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6358SVUT+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 MAX6358SVUT+T reliable?
The price and inventory of MAX6358SVUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6358SVUT+T is usually 5 days.
3.What payment methods are accepted for MAX6358SVUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6358SVUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6358SVUT+T?
MAX6358SVUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6358SVUT+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 MAX6358SVUT+T?
For technical support, including MAX6358SVUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6358SVUT+T requirements.
6.How does Aetrix verify that MAX6358SVUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6358SVUT+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 MAX6358SVUT+T meets industry standards.
7.What is the process for return or replacement of MAX6358SVUT+T?
All MAX6358SVUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6358SVUT+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 MAX6358SVUT+T part is unused and in its original packaging.
Return procedure for MAX6358SVUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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