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Analog Devices Inc./Maxim Integrated MAX6356SZUT+T
- Part No.:
- MAX6356SZUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6356SZUT+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,899
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Product details
Overview
MAX6356SZUT+T from Maxim Integrated is a triple-voltage microprocessor supervisory circuit with active-low push-pull reset output referenced to VCC1, 2.93V VCC1 threshold, 2.32V VCC2 threshold, and adjustable third-voltage monitoring via RSTIN input (1.22V internal reference). It ensures system reliability in multivoltage embedded controllers by asserting reset when either monitored supply drops below its threshold or the third voltage falls below the divider-set point.
For engineers reviewing the MAX6356SZUT+T datasheet, MAX6356SZUT+T pinout, MAX6356SZUT+T application, or MAX6356SZUT+T equivalent, key selection factors include its dual-supply monitoring capability, guaranteed RESET validity down to VCC1 = 1V or VCC2 = 1V, 100ms minimum power-on-reset pulse width, and support for third-voltage supervision using an external resistive divider on RSTIN.
Technical Context
The MAX6356SZUT+T implements a dual-threshold comparator architecture: one precision bandgap-referenced comparator for VCC1 (2.93V ±1.5% over temperature), another for VCC2 (2.32V ±1.5%), plus a dedicated 1.22V ±0.03V reference for the RSTIN input. All comparators feed into a glitch-filtered reset generator with fixed 100–280ms timeout period.
It operates across -40°C to +85°C with 20µA total supply current (ICC1 + ICC2), supports manual reset debouncing, and guarantees valid reset assertion as long as either VCC1 ≥ 1.2V or VCC2 ≥ 1.2V - enabling robust brownout detection even during deep supply sag.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.93V ±1.5% (TA = -40°C to +85°C); precise brownout detection for +3.0V rails |
| VCC2 Threshold | 2.32V ±1.5%; enables monitoring of +2.5V or +2.3V auxiliary supplies |
| RSTIN Reference | 1.22V ±0.03V; allows accurate third-voltage supervision (e.g., +1.8V, +1.2V) via external resistor divider |
| Reset Timeout | 100–280ms; ensures sufficient processor initialization time after power-up or fault recovery |
| Supply Current | 20µA typical (VCC1 = 5.5V, VCC2 = 3.6V); ultra-low power for battery-backed systems |
| Operating Temp | -40°C to +85°C; qualified for industrial and extended-temperature embedded applications |
| RESET Output | Active-low push-pull referenced to VCC1; drives directly into CMOS inputs without pull-up |
Pinout & Package
MAX6356SZUT+T is housed in a lead(Pb)-free 6-pin SOT23 package (U6-1 outline), with 1.27mm pitch, 2.9mm × 1.6mm footprint, and thermal pad not present. Pin 1 is RST (active-low push-pull, referenced to VCC1), Pin 2 is GND, Pin 3 is MR (debounced manual reset input), Pin 4 is VCC2, Pin 5 is RSTIN (third-voltage monitor input), and Pin 6 is VCC1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low push-pull reset output | Drives low to assert reset; referenced to VCC1; no external pull-up required |
| 2 - GND | Ground reference | Common return path for all internal comparators and logic; must be low-impedance |
| 3 - MR | Debounced manual-reset input | Pull low to force reset; internally pulled up (~63.5kΩ); glitch rejection >100ns |
| 4 - VCC2 | Secondary supply input & monitor rail | Power source and voltage threshold target (2.32V); must be ≥1.2V for valid operation |
| 5 - RSTIN | Adjustable third-voltage monitor input | Accepts divided-down voltage; asserts reset if input falls below 1.22V reference |
| 6 - VCC1 | Primary supply input & monitor rail | Power source and voltage threshold target (2.93V); defines RST output reference and powers RSTIN |
Key Features
| Feature | Design Value |
|---|---|
| Dual precision voltage thresholds | Factory-trimmed 2.93V (VCC1) and 2.32V (VCC2) thresholds with ±1.5% tolerance over full temperature range |
| Third-voltage supervision | RSTIN input with 1.22V ±0.03V internal reference enables accurate monitoring of any rail ≥1.22V via external resistor divider |
| Guaranteed reset validity at low VCC | RESET remains asserted and valid down to VCC1 = 1.2V or VCC2 = 1.2V - critical for brownout recovery |
| Ultra-low quiescent current | 20µA typical total supply current enables use in always-on, battery-powered systems without significant drain |
| No external components required | Self-contained dual/three-rail monitoring with integrated comparators, glitch filter, and reset timer - no capacitors or resistors needed |
Applications
| Industrial PLC Controller Power Monitoring | Medical Diagnostic Device Dual-Rail Supervision |
|---|---|
Use Scenario: A programmable logic controller uses +3.3V for I/O and +2.5V for core logic, requiring coordinated reset if either rail fails. IC Role / Device Role / Timing Role: MAX6356SZUT+T monitors both rails simultaneously and asserts a single active-low reset signal referenced to VCC1 (+3.3V) to halt CPU execution until both supplies stabilize. Use Value: Eliminates need for two discrete supervisors and OR-gating logic, reducing BOM count and PCB area while guaranteeing synchronized reset timing. | Use Scenario: A portable ultrasound unit employs +3.0V analog front-end, +2.3V digital subsystem, and +1.8V FPGA core - all requiring independent but coordinated fault detection. IC Role / Device Role / Timing Role: MAX6356SZUT+T supervises +2.93V (VCC1) and +2.32V (VCC2) rails directly, while RSTIN monitors +1.8V via 1.22V reference and 392kΩ/243kΩ divider. Use Value: Single-chip triple-rail supervision replaces three discrete supervisors, cutting component cost by 40% and improving system-level reliability through unified reset assertion. |
| Automotive Body Control Module (BCM) | IoT Edge Node with Backup Battery |
Use Scenario: A BCM requires fail-safe reset behavior during cold-crank events where main 12V-derived +3.3V and +2.5V rails dip transiently. IC Role / Device Role / Timing Role: MAX6356SZUT+T detects dips below 2.93V and 2.32V thresholds and asserts reset only after sustained violation (>100ms), ignoring short transients per built-in immunity design. Use Value: Prevents spurious resets during engine start-up, increasing system uptime and eliminating false fault logs in automotive diagnostic systems. | Use Scenario: An LPWAN sensor node uses primary +3.3V USB power and backup +2.3V coin cell, needing reliable reset coordination during power switchover. IC Role / Device Role / Timing Role: MAX6356SZUT+T continuously monitors both rails and maintains valid RESET state as long as either VCC1 ≥ 1.2V or VCC2 ≥ 1.2V - enabling seamless transition to backup power. Use Value: Guarantees uninterrupted operation during primary power loss, avoiding data corruption or state machine lockup in energy-constrained edge devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6356LTUT+T | VCC1 threshold = 4.63V (vs. 2.93V); same VCC2 = 2.32V and RSTIN capability | Suitable for systems with +5V primary rail instead of +3.0V; identical pinout and function | Select when supervising higher primary supply voltages without changing layout or firmware |
| TPS3808G33DBVR | Single-supply supervisor (3.3V threshold only); no VCC2 or RSTIN inputs; 350ms reset timeout | Lacks dual/third-rail monitoring; requires external circuitry for multivoltage systems | Use only for simple single-rail applications where cost is prioritized over feature set |
Compared with MAX6356SZUT+T, MAX6356LTUT+T offers identical triple-monitoring functionality at a higher VCC1 threshold, enabling drop-in replacement in +5V systems; TPS3808G33DBVR reduces cost but sacrifices multirail capability and requires redesign for dual-supply coordination.
Availability
MAX6356SZUT+T is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic devices, automotive body control modules, and IoT edge nodes requiring stable component supply across extended temperature ranges and multivoltage supervision.
Supply support for MAX6356SZUT+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 multivoltage supervision for embedded systems where simultaneous monitoring of two or three power rails is essential to prevent undetected brownout-induced failures.
FAQ
What is the exact VCC1 and VCC2 threshold voltage for MAX6356SZUT+T?
The MAX6356SZUT+T has a factory-trimmed VCC1 threshold of 2.93V (±1.5% over -40°C to +85°C) and a VCC2 threshold of 2.32V (±1.5%). These values are confirmed in the Voltage Threshold Levels table and Electrical Characteristics section of the official datasheet. The "SZ" suffix explicitly denotes this threshold pair, and MAX6356SZUT+T does not support adjustable thresholds - only the RSTIN input accepts external dividers for third-voltage monitoring.
Does MAX6356SZUT+T provide watchdog timer functionality?
No, MAX6356SZUT+T does not include a watchdog timer. Watchdog capability is exclusive to the MAX6358/MAX6359/MAX6360 variants (denoted by "U" or "W" in the suffix position). The "SZ" suffix identifies MAX6356SZUT+T as a member of the MAX6355/MAX6356/MAX6357 subgroup, which adds RSTIN-based third-voltage monitoring but omits the WDI pin and associated timer circuitry.
How is the third voltage monitored using RSTIN on MAX6356SZUT+T?
The RSTIN pin on MAX6356SZUT+T connects to an internal 1.22V ±0.03V precision reference comparator. To monitor a third voltage (e.g., +1.8V), a resistive divider (e.g., 392kΩ top, 243kΩ bottom) scales the rail down to ≤1.22V. When the divided voltage falls below 1.22V, MAX6356SZUT+T asserts reset. RSTIN must be powered by VCC1, and its input voltage must not exceed VCC1.
What is the reset output type and drive capability of MAX6356SZUT+T?
MAX6356SZUT+T features an active-low push-pull reset output (RST pin) referenced to VCC1. It sinks 1.2mA at VCC1 ≥ 2.7V with VOL ≤ 0.3V, and sinks 3.2mA at VCC1 ≥ 4.5V with VOL ≤ 0.4V. This eliminates the need for an external pull-up resistor and ensures clean, fast CMOS-compatible reset signaling directly to microprocessor reset inputs.
Can MAX6356SZUT+T operate with supply voltages below 2.32V or 2.93V?
Yes - MAX6356SZUT+T remains functional and guarantees valid RESET output as long as either VCC1 ≥ 1.2V or VCC2 ≥ 1.2V, per Absolute Maximum Ratings and Electrical Characteristics. Its reset assertion is triggered only when VCC1 drops below 2.93V *or* VCC2 drops below 2.32V; operation below those thresholds is normal brownout behavior, not device failure.
MAX6356SZUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 2.32V, 2.93V, Adj
- Output:
- Push-Pull, Totem Pole
- 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
MAX6356SZUT+T FAQ
1.How can I place an order for MAX6356SZUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6356SZUT+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 MAX6356SZUT+T reliable?
The price and inventory of MAX6356SZUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6356SZUT+T is usually 5 days.
3.What payment methods are accepted for MAX6356SZUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6356SZUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6356SZUT+T?
MAX6356SZUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6356SZUT+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 MAX6356SZUT+T?
For technical support, including MAX6356SZUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6356SZUT+T requirements.
6.How does Aetrix verify that MAX6356SZUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6356SZUT+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 MAX6356SZUT+T meets industry standards.
7.What is the process for return or replacement of MAX6356SZUT+T?
All MAX6356SZUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6356SZUT+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 MAX6356SZUT+T part is unused and in its original packaging.
Return procedure for MAX6356SZUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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