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Analog Devices Inc./Maxim Integrated MAX6358MSUT-T
- Part No.:
- MAX6358MSUT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6358MSUT-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6358MSUT-T from Maxim Integrated is a dual-voltage microprocessor supervisory circuit with open-drain active-low reset output, 4.38V VCC1 threshold, 2.93V VCC2 threshold, 46.4s watchdog startup timeout, and 2.9s normal watchdog timeout. It monitors two independent supply rails in multivoltage systems and asserts reset if either drops below its preset threshold. Used in portable battery-powered equipment requiring reliable power-on and fault detection.
For engineers reviewing the MAX6358MSUT-T datasheet, MAX6358MSUT-T pinout, MAX6358MSUT-T application, or MAX6358MSUT-T equivalent, key selection criteria include dual-supply monitoring capability, guaranteed RESET validity down to VCC1 = 1V or VCC2 = 1V, watchdog timer architecture with startup/normal modes, and SOT23-6 package compatibility for space-constrained embedded designs.
Technical Context
The MAX6358MSUT-T implements a dual-threshold voltage monitor with independent trip points for VCC1 (4.38V) and VCC2 (2.93V), asserting reset when either supply falls below its respective threshold. Its watchdog timer features two distinct timeout periods: a 46.4s startup mode for system initialization and a 2.9s normal mode for runtime supervision.
Reset assertion is guaranteed as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V, enabling robust operation during brownout conditions. The device uses an internal debounced manual-reset input and provides an open-drain RST output compatible with TTL/CMOS logic levels and external pull-up configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.38V ±0.08V at +25°C; factory-trimmed precision reference for primary supply monitoring |
| VCC2 Threshold | 2.93V ±0.05V at +25°C; independent secondary supply trip point for dual-rail validation |
| Watchdog Startup Timeout | 46.4s typical; extended window allowing full system boot before watchdog enforcement begins |
| Watchdog Normal Timeout | 2.9s typical; fast response to processor lockup during active operation |
| Supply Current | 20µA typical at VCC1=5.5V/VCC2=3.6V; ultra-low quiescent current for battery longevity |
| Reset Pulse Width | 100ms minimum; meets μP reset timing requirements without external timing components |
| Operating Temperature | -40°C to +85°C; qualified for industrial and extended-temperature embedded applications |
Pinout & Package
MAX6358MSUT-T is housed in a 6-pin SOT23 package (U6-1 outline, land pattern 90-0175), with 1.0mm pitch, 2.9mm × 1.6mm footprint, and 1.1mm max height - suitable for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low open-drain reset output; requires external pull-up; valid as long as VCC1 ≥ 1V or VCC2 ≥ 1V |
| 2 | GND | Analog/digital ground reference; common return path for all internal circuitry and monitored supplies |
| 3 | MR | Debounced manual-reset input; low pulse forces reset; internally pulled up; VMR ≤ VCC1 |
| 4 | VCC2 | Secondary supply input and monitor rail; powers device when > VCC1; threshold = 2.93V |
| 5 | WDI | Watchdog timer input; rising/falling edge resets timeout counter; unconnected disables watchdog |
| 6 | VCC1 | Primary supply input and monitor rail; powers device when > VCC2; threshold = 4.38V |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage thresholds | Factory-set 4.38V (VCC1) and 2.93V (VCC2) enable precise monitoring of asymmetric supply rails without external resistors |
| Two-mode watchdog timer | 46.4s startup timeout accommodates complex boot sequences; 2.9s normal timeout ensures rapid fault detection post-initialization |
| Guaranteed reset validity to 1V | RESET remains asserted and functional even as either VCC1 or VCC2 decays to 1.0V - critical for brownout recovery |
| 20µA supply current | Enables multi-year operation on coin-cell batteries in portable instrumentation and remote sensors |
| SOT23-6 package | Industry-standard 6-pin footprint allows drop-in replacement in existing supervisory circuits and supports automated assembly |
Applications
| Portable Power Management | Battery-Powered Instrumentation |
|---|---|
|
Use Scenario: A handheld multimeter powered by two AA cells must maintain accurate ADC readings and memory retention during voltage sag. IC Role / Device Role / Timing Role: MAX6358MSUT-T monitors VCC1 (3.3V LDO output) and VCC2 (1.8V analog rail), asserting reset before supply collapse corrupts firmware or sensor data. Use Value: Prevents invalid measurements and EEPROM corruption by guaranteeing clean reset initiation at precisely 4.38V/2.93V thresholds with no external components. |
Use Scenario: An industrial handheld gas detector uses a low-power MCU and electrochemical sensor requiring stable dual-rail power. IC Role / Device Role / Timing Role: MAX6358MSUT-T supervises main 3.3V digital supply and 2.5V analog sensor bias rail, while its watchdog verifies MCU responsiveness during periodic self-test cycles. Use Value: Eliminates need for discrete RC reset networks and separate watchdog ICs - reducing BOM count and board area by 30%. |
| Industrial Controller Boot Integrity | Embedded Multivoltage System Monitoring |
|
Use Scenario: A programmable logic controller (PLC) module boots from flash and initializes multiple peripherals across different voltage domains. IC Role / Device Role / Timing Role: MAX6358MSUT-T provides synchronized reset to CPU and FPGA using its open-drain RST output, with 46.4s startup timeout allowing full FPGA configuration before watchdog activation. Use Value: Ensures deterministic boot sequence by holding reset until both 5V I/O and 3.3V core supplies stabilize above their thresholds. |
Use Scenario: A medical patient monitor integrates ARM Cortex-M4, display driver, and analog front-end - each operating at distinct voltages. IC Role / Device Role / Timing Role: MAX6358MSUT-T continuously validates 4.38V system rail and 2.93V interface rail, asserting reset within 20µs of threshold violation to prevent metastability in cross-domain signals. Use Value: Achieves <100ppm/°C tempco on thresholds and rejects transients <100ns - meeting IEC 60601 immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6359MSUT-T | Same thresholds (4.38V/2.93V) but push-pull RST output referenced to VCC1 instead of open-drain | Requires no external pull-up; incompatible with wired-OR reset buses | Select MAX6359MSUT-T when driving single-load reset lines directly; choose MAX6358MSUT-T for shared reset busses or level-shifting interfaces |
| TPS3808G33DBVR | Single-supply monitor (3.3V threshold only); no dual-rail or watchdog capability; 350nA quiescent current | Lacks VCC2 monitoring and watchdog - suitable only for simple single-rail systems | Use TPS3808G33DBVR only when monitoring one supply and ultra-low current (<1µA) is mandatory; MAX6358MSUT-T is required for dual-rail integrity |
Compared with MAX6359MSUT-T, MAX6358MSUT-T offers open-drain flexibility for bus sharing but requires a pull-up resistor; versus TPS3808G33DBVR, it delivers essential dual-supply supervision and watchdog functionality at the cost of higher quiescent current - making it the only viable choice for multivoltage embedded systems requiring fault resilience.
Availability
MAX6358MSUT-T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, intelligent instruments, and multivoltage systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6358MSUT-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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX6351–MAX6360 family was designed specifically for multivoltage microprocessor supervision - delivering precision dual-threshold monitoring, integrated watchdog timers, and ultra-low-power operation in minimal-footprint packages.
FAQ
What is the exact VCC1 and VCC2 threshold voltage for MAX6358MSUT-T?
The MAX6358MSUT-T has a factory-set VCC1 threshold of 4.38V (±0.08V at +25°C) and VCC2 threshold of 2.93V (±0.05V at +25°C), as defined by the "MS" suffix per the Voltage Threshold Levels table. These values are trimmed during production and guaranteed over -40°C to +85°C.
Does MAX6358MSUT-T provide a push-pull or open-drain reset output?
MAX6358MSUT-T provides an active-low open-drain RST output (Pin 1), requiring an external pull-up resistor. This differs from push-pull variants like MAX6359MSUT-T and enables wired-OR reset bus configurations and level translation across voltage domains.
What are the watchdog timeout periods for MAX6358MSUT-T?
MAX6358MSUT-T features two watchdog timeout periods: a 46.4s startup timeout (after power-on or manual reset) and a 2.9s normal timeout (during steady-state operation). Both are specified at +25°C and vary ±10% over temperature.
Can MAX6358MSUT-T operate with supply voltages below 2.0V?
Yes - MAX6358MSUT-T guarantees valid reset operation as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V. Its internal circuitry remains functional down to 1.2V over the full -40°C to +85°C range, supporting brownout detection in low-voltage battery systems.
Is MAX6358MSUT-T pin-compatible with other devices in the MAX6351–MAX6360 family?
MAX6358MSUT-T shares the same 6-pin SOT23 (U6-1) package and pinout with MAX6351, MAX6355–MAX6360, but differs functionally: Pin 5 is WDI (not RSTIN or RST2), and RST is open-drain. Mechanical compatibility exists, but electrical behavior must be verified per application requirements.
MAX6358MSUT-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 2.93V, 4.38V
- 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-23-6
MAX6358MSUT-T FAQ
1.How can I place an order for MAX6358MSUT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6358MSUT-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 MAX6358MSUT-T reliable?
The price and inventory of MAX6358MSUT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6358MSUT-T is usually 5 days.
3.What payment methods are accepted for MAX6358MSUT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6358MSUT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6358MSUT-T?
MAX6358MSUT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6358MSUT-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 MAX6358MSUT-T?
For technical support, including MAX6358MSUT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6358MSUT-T requirements.
6.How does Aetrix verify that MAX6358MSUT-T is sourced from the original manufacturer or authorized distributors?
All MAX6358MSUT-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 MAX6358MSUT-T meets industry standards.
7.What is the process for return or replacement of MAX6358MSUT-T?
All MAX6358MSUT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6358MSUT-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 MAX6358MSUT-T part is unused and in its original packaging.
Return procedure for MAX6358MSUT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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