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Analog Devices Inc./Maxim Integrated MAX6358LSUT+T
- Part No.:
- MAX6358LSUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6358LSUT+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,785
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Product details
Overview
MAX6358LSUT+T from Maxim Integrated is a dual-voltage microprocessor supervisory circuit with open-drain active-low reset output, 4.63V VCC1 threshold, 2.93V VCC2 threshold, 46.4s watchdog startup timeout, and 2.9s normal watchdog timeout-designed for reliable power monitoring in multivoltage embedded systems such as industrial controllers and portable instrumentation.
For engineers reviewing the MAX6358LSUT+T datasheet, MAX6358LSUT+T pinout, MAX6358LSUT+T application, or MAX6358LSUT+T equivalent, key selection criteria include its dual-supply monitoring capability, guaranteed RESET validity down to VCC1 = 1V or VCC2 = 1V, 20µA supply current, 100ms min reset pulse width, and SOT23-6 lead-free package compatibility.
Technical Context
The MAX6358LSUT+T monitors two independent supply rails (VCC1 and VCC2), asserting reset if either drops below its factory-set threshold (4.63V and 2.93V respectively). Its open-drain RST output requires an external pull-up and remains valid as long as either supply exceeds +1.0V.
It integrates a dual-mode watchdog timer: a 46.4s startup timeout enables extended system initialization, followed by a 2.9s normal timeout for runtime processor activity monitoring. The debounced manual-reset input (MR) forces reset on low assertion and supports TTL/CMOS logic levels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.63V ±0.09V at +25°C; ensures precise reset assertion when primary supply falls below nominal 4.63V rail |
| VCC2 Threshold | 2.93V ±0.05V at +25°C; triggers reset when secondary supply (e.g., I/O or core voltage) dips below 2.93V |
| Watchdog Startup Timeout | 46.4s typical; provides sufficient time for complex boot sequences before watchdog enforcement begins |
| Watchdog Normal Timeout | 2.9s typical; detects processor lockup or software hang during active operation |
| Supply Current | 20µA typical at VCC1=5.5V/VCC2=3.6V; enables ultra-low-power operation in battery-backed systems |
| Reset Pulse Width | 100ms minimum; guarantees sufficient duration for μP reset deassertion and clock stabilization |
| Operating Temperature | -40°C to +85°C; qualified for industrial and extended-environment embedded applications |
Pinout & Package
MAX6358LSUT+T is housed in a RoHS-compliant 6-pin SOT23 package (U6-1 outline), with 1.0mm pitch, 2.9mm × 1.6mm footprint, and thermal pad omitted. Pin 1 is RST (open-drain active-low reset), Pin 2 is GND, Pin 3 is MR (manual reset input), Pin 4 is VCC2, Pin 5 is WDI (watchdog input), and Pin 6 is VCC1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST (Pin 1) | Open-drain active-low reset output | Requires external pull-up; asserts low when VCC1 or VCC2 falls below threshold; valid down to VCC ≥ 1V |
| GND (Pin 2) | Ground reference | Common return path for all internal circuitry and monitored supplies |
| MR (Pin 3) | Debounced manual-reset input | Pull low to force reset; internally debounced; compatible with TTL/CMOS logic |
| VCC2 (Pin 4) | Secondary supply input & monitor | Monitors 2.93V rail; powers device when VCC2 > VCC1; must be ≤ +6V |
| WDI (Pin 5) | Watchdog timer input | Edge-triggered; clears timer on rising/falling edge; timeout occurs if no transition within 2.9s (normal mode) |
| VCC1 (Pin 6) | Primary supply input & monitor | Monitors 4.63V rail; powers device when VCC1 > VCC2; must be ≤ +6V |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneously tracks 4.63V and 2.93V rails with separate thresholds-eliminates need for discrete comparators in dual-supply systems |
| Guaranteed RESET validity to 1V | Ensures functional reset signaling even during brownout conditions where either VCC1 or VCC2 drops to 1.0V |
| Two-phase watchdog timer | 46.4s startup timeout prevents false resets during boot; 2.9s normal timeout delivers rapid fault detection post-initialization |
| 20µA ultra-low quiescent current | Minimizes standby power draw-critical for battery-powered portable equipment and always-on monitoring nodes |
| SOT23-6 lead-free packaging | RoHS-compliant 6-pin surface-mount package enabling high-density PCB layouts and automated assembly |
Applications
| Industrial Controllers | Portable Instrumentation |
|---|---|
Use Scenario: PLCs and motor drives requiring coordinated reset of CPU and I/O power domains during undervoltage events. IC Role / Device Role / Timing Role: Dual-threshold supervisor asserting open-drain reset across both 4.63V (CPU core) and 2.93V (I/O interface) rails. Use Value: Prevents partial initialization and metastable states by guaranteeing synchronized reset when either rail fails-validated over -40°C to +85°C. | Use Scenario: Handheld test meters powered by single-cell Li-ion batteries with regulated 3.3V and 2.8V subsystems. IC Role / Device Role / Timing Role: Monitors main regulator (4.63V) and analog front-end supply (2.93V); uses 20µA current to extend battery life. Use Value: Enables reliable brownout recovery without external components-no pull-ups or RC networks needed for basic supervision. |
| Embedded Communication Gateways | Intelligent Power Management Units |
Use Scenario: Cellular/Wi-Fi gateways with ARM SoC (VCC1 = 4.63V) and RF transceiver (VCC2 = 2.93V) requiring fail-safe boot sequencing. IC Role / Device Role / Timing Role: Provides 46.4s watchdog startup window for firmware loading and PHY calibration before enforcing 2.9s runtime watchdog. Use Value: Eliminates need for external timing capacitors or microcontroller-based watchdog initialization-reduces BOM count and layout area. | Use Scenario: Smart battery packs monitoring cell stack voltage (VCC1) and protection IC supply (VCC2) with autonomous reset coordination. IC Role / Device Role / Timing Role: Open-drain RST output interfaces directly to enable inputs of multiple DC-DC converters and LDOs. Use Value: Ensures all downstream regulators release reset simultaneously upon valid supply restoration-prevents cascaded power-up faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6358LTUT+T | VCC1 threshold = 4.38V (vs. 4.63V); same VCC2 = 2.93V, watchdog, and SOT23-6 package | Suitable for systems using 4.38V primary rail (e.g., certain FPGA I/O banks) instead of 4.63V | Select when primary supply nominal is 4.38V; identical functionality otherwise |
| MAX6359LSUT+T | Push-pull RST output referenced to VCC1 (vs. open-drain); same thresholds and watchdog timing | Eliminates need for external pull-up resistor but requires compatible μP reset input impedance | Choose for simplified board layout where push-pull drive is acceptable and load capacitance is low |
Compared with MAX6358LSUT+T, MAX6358LTUT+T shifts the primary threshold downward for tighter 4.38V tolerance, while MAX6359LSUT+T replaces the open-drain output with push-pull drive-offering layout simplification at the cost of reduced interface flexibility.
Availability
MAX6358LSUT+T is available at Aetrix Electronics and suitable for industrial controllers, portable instrumentation, and embedded communication gateways requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6358LSUT+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 and mixed-signal ICs for industrial, automotive, and communications applications.
The MAX6351–MAX6360 family delivers dual- and triple-voltage supervision with integrated watchdog timers, targeting reliability-critical embedded systems where coordinated power-rail monitoring and fail-safe reset are mandatory.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6358LSUT+T?
The MAX6358LSUT+T has a factory-set VCC1 threshold of 4.63V (±0.09V at +25°C) and a VCC2 threshold of 2.93V (±0.05V at +25°C). These values are specified over the full -40°C to +85°C operating range, with worst-case tolerances of 4.50V to 4.75V for VCC1 and 2.85V to 3.00V for VCC2.
Does the MAX6358LSUT+T provide a push-pull or open-drain reset output?
The MAX6358LSUT+T features an open-drain active-low reset output (RST pin), requiring an external pull-up resistor. This differs from push-pull variants like MAX6359LSUT+T. The open-drain configuration allows wired-OR connectivity with other reset sources and supports level-shifting across different voltage domains.
What are the watchdog timeout periods supported by the MAX6358LSUT+T?
The MAX6358LSUT+T implements a dual-mode watchdog timer: a 46.4s startup timeout (after power-on or manual reset) and a 2.9s normal timeout during steady-state operation. The timer resets on any WDI pin edge and triggers RST assertion if no transition occurs within the active timeout period.
Can the MAX6358LSUT+T operate with supply voltages below 2.0V?
Yes-the MAX6358LSUT+T guarantees valid reset output as long as either VCC1 or VCC2 remains above +1.0V. Its operational supply range is VCC1/VCC2 = +1.2V to +5.5V over temperature, and it maintains functionality down to 1.2V per rail, making it suitable for low-voltage battery-backed systems.
Is the MAX6358LSUT+T pin-compatible with other devices in the MAX6351–MAX6360 family?
The MAX6358LSUT+T uses the standard 6-pin SOT23 (U6-1) package and shares identical pinout with MAX6355–MAX6360 variants: Pin 1 = RST, Pin 2 = GND, Pin 3 = MR, Pin 4 = VCC2, Pin 5 = WDI, Pin 6 = VCC1. However, functionally it is not pin-compatible with 5-pin variants (e.g., MAX6352) or non-watchdog parts due to WDI pin presence and open-drain output behavior.
MAX6358LSUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 2.93V, 4.63V
- 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
MAX6358LSUT+T FAQ
1.How can I place an order for MAX6358LSUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6358LSUT+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 MAX6358LSUT+T reliable?
The price and inventory of MAX6358LSUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6358LSUT+T is usually 5 days.
3.What payment methods are accepted for MAX6358LSUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6358LSUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6358LSUT+T?
MAX6358LSUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6358LSUT+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 MAX6358LSUT+T?
For technical support, including MAX6358LSUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6358LSUT+T requirements.
6.How does Aetrix verify that MAX6358LSUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6358LSUT+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 MAX6358LSUT+T meets industry standards.
7.What is the process for return or replacement of MAX6358LSUT+T?
All MAX6358LSUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6358LSUT+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 MAX6358LSUT+T part is unused and in its original packaging.
Return procedure for MAX6358LSUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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