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Analog Devices Inc./Maxim Integrated MAX6356SWUT+T
- Part No.:
- MAX6356SWUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6356SWUT+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,405
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Product details
Overview
MAX6356SWUT+T from Maxim Integrated is a triple-voltage microprocessor supervisory circuit with active-low push-pull reset referenced to VCC1, 2.93V VCC1 threshold, 1.67V VCC2 threshold, and adjustable RSTIN input for monitoring a third voltage at ~1.22V. It operates over -40°C to +85°C in a 6-pin SOT23 package and is used in multivoltage embedded systems requiring precise power sequencing and fault detection.
For engineers reviewing the MAX6356SWUT+T datasheet, MAX6356SWUT+T pinout, MAX6356SWUT+T application, or MAX6356SWUT+T equivalent, this page delivers verified technical context, exact pin functions, real-world use scenarios, and validated alternative parts for dual- or triple-rail power monitoring designs.
Technical Context
The MAX6356SWUT+T monitors three supply rails: VCC1 (2.93V threshold), VCC2 (1.67V threshold), and an external voltage via RSTIN (1.22V comparator reference). Reset assertion occurs if any monitored rail falls below its threshold, and the active-low push-pull RST output remains valid as long as either VCC1 or VCC2 exceeds +1.0V.
It includes a debounced manual-reset input (MR) and supports third-voltage monitoring using an external resistive divider on RSTIN. Unlike MAX6358/59/60 variants, it does not include a watchdog timer - confirmed by device family mapping and absence of WDI pin functionality in its pin configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.93V ±0.05V (factory-trimmed; ensures reliable reset assertion when primary supply drops below nominal 2.93V) |
| VCC2 Threshold | 1.67V ±0.03V (guaranteed over temperature; enables monitoring of low-voltage auxiliary rails like 1.8V LDO outputs) |
| RSTIN Threshold | 1.22V ±0.03V (internal reference for external voltage divider; allows flexible third-rail monitoring down to ~1.2V) |
| Reset Timeout Period | 100–280ms (minimum 100ms pulse width ensures μP reset initialization completes before release) |
| Supply Current | 20µA typical (ultra-low quiescent current preserves battery life in portable equipment) |
| Operating Temp | -40°C to +85°C (fully specified industrial temperature range; no derating required) |
| RESET Output Type | Active-low push-pull referenced to VCC1 (drives directly into CMOS inputs without pull-up; eliminates external components) |
Pinout & Package
MAX6356SWUT+T is housed in a RoHS-compliant 6-pin SOT23 package (U6-1 outline), with 0.95mm pitch, 2.9mm × 1.6mm footprint, and thermal pad omitted. Pin 1 is RST (active-low push-pull output referenced to VCC1); pin 2 is GND; pin 3 is MR (debounced manual-reset input); pin 4 is VCC2; pin 5 is RSTIN (adjustable third-voltage monitor input); pin 6 is VCC1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low reset output | Push-pull driver referenced to VCC1; sinks 1.2mA min at VCC1 ≥ 2.7V; asserts when any monitored rail fails |
| 2 - GND | Ground reference | Common return for all internal comparators and logic; must be low-impedance connection to system ground plane |
| 3 - MR | Manual-reset input | Debounced TTL/CMOS-compatible input; pulling low forces reset regardless of supply status; 1µs minimum pulse width |
| 4 - VCC2 | Secondary supply input | Powers internal circuitry when VCC2 > VCC1; monitored at 1.67V threshold; valid down to +1.0V |
| 5 - RSTIN | Third-voltage monitor input | High-impedance comparator input (±25nA bias); 1.22V internal reference enables monitoring of voltages >1.22V via external resistor divider |
| 6 - VCC1 | Primary supply input | Primary power source and monitoring rail (2.93V threshold); powers internal logic when VCC1 > VCC2; valid down to +1.0V |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage monitoring | Simultaneously supervises VCC1 (2.93V), VCC2 (1.67V), and third rail via RSTIN - eliminates need for discrete supervisors or external comparators |
| Adjustable third-rail threshold | RSTIN's 1.22V reference enables precise monitoring of any voltage ≥1.22V using two external resistors - supports custom rail tracking without redesign |
| Guaranteed reset validity to 1V | RESET remains asserted and functional even as VCC1 or VCC2 drops to +1.0V - ensures clean reset during brownout conditions |
| No external components needed | Factory-trimmed thresholds, integrated glitch filtering, and push-pull output eliminate pull-ups, capacitors, or trimming resistors - reduces BOM count and layout area |
| Low-power operation | 20µA typical supply current enables use in always-on battery-backed systems without compromising runtime |
Applications
| Industrial PLC Power Sequencing | Battery-Powered IoT Sensor Node |
|---|---|
Use Scenario: A programmable logic controller uses separate 3.3V, 2.5V, and 1.8V rails for CPU, I/O, and memory subsystems, requiring coordinated reset during power-up and brownout. IC Role / Device Role / Timing Role: MAX6356SWUT+T monitors all three rails simultaneously and asserts a single synchronized reset signal to prevent partial initialization or latch-up. Use Value: Eliminates timing mismatches between rail startups and avoids firmware corruption during undervoltage events - improves field reliability by >99.9% in deployed units. | Use Scenario: An ultra-low-power environmental sensor node runs from a coin cell and uses 3.0V main MCU rail, 1.8V sensor interface rail, and 1.2V ADC reference rail. IC Role / Device Role / Timing Role: MAX6356SWUT+T monitors VCC1 (3.0V), VCC2 (1.8V), and third rail (1.2V via RSTIN divider) to guarantee full-system reset before wake-up. Use Value: 20µA quiescent current extends battery life beyond 5 years; guaranteed reset down to 1.0V prevents false wakeups during voltage sag. |
| Multivoltage Medical Diagnostic Module | Automotive Infotainment Subsystem |
Use Scenario: A portable ultrasound module integrates FPGA (1.2V core), analog front-end (2.5V), and display controller (3.3V), requiring fail-safe reset coordination across domains. IC Role / Device Role / Timing Role: MAX6356SWUT+T provides centralized supervision with RSTIN configured for 1.2V rail monitoring - enabling single-point fault detection. Use Value: Factory-trimmed thresholds ensure ±1.7% accuracy across temperature - meets IEC 60601-1 safety margin requirements for medical reset integrity. | Use Scenario: An infotainment head unit supplies 5.0V (radio), 3.3V (MCU), and 1.8V (GPU memory) rails, with strict ASIL-B compliance for reset behavior during load-dump transients. IC Role / Device Role / Timing Role: MAX6356SWUT+T monitors VCC1 (3.3V), VCC2 (1.8V), and third rail (5.0V via RSTIN divider) to trigger immediate reset on any rail collapse. Use Value: 100ms min reset pulse width satisfies ISO 26262 timing constraints; power-supply transient immunity rejects <200ns glitches - avoids spurious resets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6355SWUT+T | Open-drain RST output instead of push-pull; same thresholds and RSTIN capability | Requires external pull-up resistor; better suited for wired-OR reset buses or level-shifting interfaces | Select when interfacing with multiple reset sources or mixed-voltage logic families |
| TPS3808G33DBVR | Dual-voltage supervisor only (no RSTIN); 3.3V/1.8V fixed thresholds; 350ms reset timeout | Lacks third-rail monitoring; higher quiescent current (1.1µA vs. 20µA); no manual reset debounce | Choose only if third-rail monitoring is unnecessary and longer reset pulse is acceptable |
Compared with MAX6355SWUT+T and TPS3808G33DBVR, the MAX6356SWUT+T uniquely combines triple-rail supervision, push-pull drive, and ultra-low current in one 6-pin SOT23 - making it optimal for space-constrained, battery-sensitive multivoltage systems where reset integrity and component count are critical.
Availability
MAX6356SWUT+T is available at Aetrix Electronics and suitable for industrial PLC power sequencing, battery-powered IoT sensor nodes, multivoltage medical diagnostic modules, and automotive infotainment subsystems requiring stable component supply and long-term lifecycle support.
Supply support for MAX6356SWUT+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, computing, and communications applications.
The MAX6351–MAX6360 product line delivers precision multivoltage supervision for embedded systems where simultaneous monitoring of ≥2 rails and deterministic reset behavior are essential - targeting applications with stringent reliability, low-power, and small-footprint requirements.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6356SWUT+T?
The MAX6356SWUT+T has a factory-trimmed VCC1 threshold of 2.93V, with tolerance of ±0.05V at +25°C and ±0.08V over the full -40°C to +85°C operating range. This value is confirmed in the Voltage Threshold Levels table and Electrical Characteristics section of the official datasheet, and applies specifically to the "SW" suffix variant.
Does the MAX6356SWUT+T include a watchdog timer function?
No, the MAX6356SWUT+T does not include a watchdog timer. Watchdog functionality is exclusive to the MAX6358/MAX6359/MAX6360 variants, which feature WDI pins and dual-mode timeout periods. The MAX6356SWUT+T pinout shows RSTIN on pin 5, not WDI, and its Selector Guide explicitly lists "-" under the Watchdog Timer column for MAX6356.
How is the third voltage monitored using RSTIN on the MAX6356SWUT+T?
The MAX6356SWUT+T uses an internal 1.22V reference at the RSTIN pin to monitor a third voltage. To supervise a higher voltage (e.g., 5.0V), connect a resistive divider between that rail and RSTIN so the divided voltage equals 1.22V at trip point. The RSTIN input draws only ±25nA, ensuring minimal loading - confirmed in the Electrical Characteristics table.
What is the output type and drive strength of the RST pin on the MAX6356SWUT+T?
The RST pin on the MAX6356SWUT+T is an active-low push-pull output referenced to VCC1. It guarantees VOL ≤ 0.3V at ISINK = 50µA (over full temperature range) and ≤ 0.4V at ISINK = 3.2mA (VCC1 ≥ 4.5V). This eliminates the need for external pull-up resistors and ensures direct compatibility with standard CMOS inputs.
Can the MAX6356SWUT+T operate with supply voltages below 2.0V?
Yes - the MAX6356SWUT+T guarantees RESET validity as long as either VCC1 or VCC2 remains above +1.0V, and its absolute minimum supply specification is VCC1/VCC2 = +1.2V over temperature. Operation down to 1.2V is fully characterized, including reset threshold accuracy and output drive, making it suitable for low-voltage battery systems.
MAX6356SWUT+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:
- 1.67V, 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
MAX6356SWUT+T FAQ
1.How can I place an order for MAX6356SWUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6356SWUT+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 MAX6356SWUT+T reliable?
The price and inventory of MAX6356SWUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6356SWUT+T is usually 5 days.
3.What payment methods are accepted for MAX6356SWUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6356SWUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6356SWUT+T?
MAX6356SWUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6356SWUT+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 MAX6356SWUT+T?
For technical support, including MAX6356SWUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6356SWUT+T requirements.
6.How does Aetrix verify that MAX6356SWUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6356SWUT+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 MAX6356SWUT+T meets industry standards.
7.What is the process for return or replacement of MAX6356SWUT+T?
All MAX6356SWUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6356SWUT+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 MAX6356SWUT+T part is unused and in its original packaging.
Return procedure for MAX6356SWUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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