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Analog Devices Inc./Maxim Integrated MAX6356TWUT+T
- Part No.:
- MAX6356TWUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6356TWUT+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,568
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Product details
Overview
MAX6356TWUT+T from Maxim Integrated is a triple-voltage microprocessor supervisory circuit with active-low push-pull reset referenced to VCC1, 3.08V 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 reliable power-up sequencing and fault detection.
For engineers reviewing the MAX6356TWUT+T datasheet, MAX6356TWUT+T pinout, MAX6356TWUT+T application, or MAX6356TWUT+T equivalent, key selection criteria include dual-supply monitoring with independent thresholds, guaranteed RESET validity down to VCC1 = 1V or VCC2 = 1V, 100ms min reset timeout, 20µA supply current, and RSTIN-based third-voltage supervision capability.
Technical Context
The MAX6356TWUT+T monitors three voltage rails: VCC1 (3.08V threshold), VCC2 (1.67V threshold), and an external rail via RSTIN (1.22V comparator input). Reset assertion occurs if any monitored voltage falls below its trip point, and the active-low push-pull RST output remains valid as long as either VCC1 ≥ 1V or VCC2 ≥ 1V.
It features factory-trimmed precision thresholds (±1.5% typical over temperature), 20ppm/°C tempco, and 100ms–280ms reset timeout period. The RSTIN input supports external resistive divider configuration for custom third-rail thresholds while drawing only ±25nA input current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 3.08V ±1.5% (TA = -40°C to +85°C); ensures precise reset initiation on primary supply rail |
| VCC2 Threshold | 1.67V ±1.5% (TA = -40°C to +85°C); enables supervision of low-voltage auxiliary or I/O rails |
| RSTIN Threshold | 1.22V ±0.03V (TA = -40°C to +85°C); allows accurate third-rail monitoring via external resistor divider |
| Reset Timeout Period | 100ms–280ms; guarantees sufficient processor initialization time after power-up or fault recovery |
| Supply Current | 20µA typical (VCC1 = 5.5V, VCC2 = 3.6V); minimizes quiescent load in battery-powered systems |
| Operating Temperature | -40°C to +85°C; qualified for industrial and extended-temperature embedded applications |
| RESET Output Type | Active-low push-pull referenced to VCC1; eliminates need for external pull-up and ensures fast, rail-to-rail drive |
Pinout & Package
MAX6356TWUT+T is housed in a RoHS-compliant 6-pin SOT23 package (U6-1 outline, land pattern 90-0175), with 0.95mm pitch and 2.9mm × 1.6mm footprint. The package supports reflow soldering and is rated for operation up to +150°C junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; drives low during fault or manual reset, high otherwise |
| 2 | GND | Ground reference for internal comparators, watchdog, and reset generator |
| 3 | MR | Debounced manual-reset input; asserted low forces reset regardless of supply status |
| 4 | VCC2 | Secondary supply input and monitored rail; powers device when > VCC1 and triggers reset if < 1.67V |
| 5 | RSTIN | Adjustable undervoltage-comparator input; asserts reset when external rail falls below 1.22V (or scaled value) |
| 6 | VCC1 | Primary supply input and monitored rail; powers device when > VCC2 and triggers reset if < 3.08V |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage supervision | Monitors VCC1 (3.08V), VCC2 (1.67V), and third rail via RSTIN (1.22V) - enables full-system power integrity in SoC/FPGA platforms |
| Precision factory-set thresholds | ±1.5% tolerance over -40°C to +85°C - eliminates calibration overhead and improves BOM consistency |
| Guaranteed RESET validity to 1V | Outputs remain functional even if VCC1 ≥ 1V or VCC2 ≥ 1V - ensures fail-safe behavior during brownout conditions |
| Low 20µA quiescent current | Reduces standby power in portable/battery-powered equipment without compromising supervision accuracy |
| Debounced TTL/CMOS MR input | Rejects <100ns glitches and requires ≥1µs pulse width - prevents spurious resets from noisy control lines |
Applications
| FPGA Power Sequencing | Industrial PLC Controller |
|---|---|
Use Scenario: Coordinating startup of core, I/O, and auxiliary rails in Xilinx/Intel FPGA designs where out-of-sequence power can cause latch-up or configuration failure. IC Role / Device Role / Timing Role: MAX6356TWUT+T acts as a triple-rail supervisor that independently validates 3.3V core, 1.8V I/O, and 1.2V auxiliary supplies before releasing FPGA reset. Use Value: Prevents invalid configuration by enforcing strict voltage-ordering compliance and provides 100ms minimum reset hold time for FPGA bitstream loading. |
Use Scenario: Ensuring deterministic boot and runtime fault response in DIN-rail mounted programmable logic controllers exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: MAX6356TWUT+T monitors 5V system, 3.3V MCU, and 1.67V sensor interface rails, asserting reset if any drops below threshold during cold start or EMI transients. Use Value: Guarantees RESET remains valid down to VCC1 = 1V or VCC2 = 1V - critical for maintaining safe state during brownouts common in factory floor power distribution. |
| Battery-Powered Medical Monitor | Automotive Infotainment Head Unit |
Use Scenario: Supervising dual Li-ion battery paths (main + backup) and analog front-end supply in portable ECG/SpO₂ devices with strict low-power requirements. IC Role / Device Role / Timing Role: MAX6356TWUT+T monitors main 3.08V rail, backup 1.67V rail, and ADC reference voltage via RSTIN to detect battery depletion or regulator failure. Use Value: 20µA supply current extends battery life; RSTIN's 1.22V threshold enables direct supervision of 2.5V ADC reference using 1:1 divider - no additional components needed. |
Use Scenario: Validating multiple power domains (5V infotainment core, 3.3V CAN interface, 1.67V display backlight driver) in automotive head units subject to load-dump and cold-crank conditions. IC Role / Device Role / Timing Role: MAX6356TWUT+T serves as centralized voltage supervisor, asserting reset on any rail collapse and enabling safe firmware recovery before CAN bus reinitialization. Use Value: Power-supply transient immunity and 20ppm/°C tempco ensure stable operation across -40°C to +85°C under vehicle electrical noise - meeting AEC-Q100 stress test expectations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6355TWUT+T | Open-drain RST output instead of push-pull; identical VCC1/VCC2 thresholds and RSTIN specs | Requires external pull-up resistor; suitable where level-shifting or wired-OR reset buses are needed | Select MAX6355TWUT+T only if system architecture mandates open-drain reset signaling or shared reset bus topology. |
| TPS3808G30DBVR | Dual-voltage supervision only (no RSTIN); 3.0V VDD threshold, 1.22V adjustability via external resistor; 350nA IQ | Lacks third-rail monitoring capability; optimized for ultra-low-power single-supply systems | Choose TPS3808G30DBVR only when third-voltage supervision is unnecessary and sub-1µA quiescent current is mandatory. |
Compared with MAX6356TWUT+T, MAX6355TWUT+T trades push-pull drive for open-drain flexibility but adds board-level component count, while TPS3808G30DBVR reduces power consumption significantly but removes the critical RSTIN-based third-rail supervision required in multivoltage SoC/FPGA systems.
Availability
MAX6356TWUT+T is available at Aetrix Electronics and suitable for FPGA power sequencing, industrial PLC controllers, battery-powered medical monitors, and automotive infotainment head units requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for MAX6356TWUT+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, communications, and consumer applications.
The MAX6351–MAX6360 family was designed specifically for multivoltage microprocessor systems requiring simultaneous, precision monitoring of two or three independent supply rails with minimal external components and guaranteed operation across extended temperature ranges.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6356TWUT+T?
The MAX6356TWUT+T has a VCC1 threshold of 3.08V (±1.5% over -40°C to +85°C) and a VCC2 threshold of 1.67V (±1.5% over the same range). These values are factory-trimmed and specified in the Voltage Threshold Levels table of the datasheet; the "TW" suffix directly encodes these thresholds.
Does the MAX6356TWUT+T provide watchdog timer functionality?
No, the MAX6356TWUT+T does not include a watchdog timer. Watchdog capability is exclusive to the MAX6358/MAX6359/MAX6360 variants. The MAX6356TWUT+T belongs to the MAX6355/MAX6356/MAX6357 subgroup, which adds RSTIN-based third-voltage supervision but omits WDI functionality.
How is the third voltage monitored using the RSTIN pin on the MAX6356TWUT+T?
The RSTIN pin on the MAX6356TWUT+T contains an internal 1.22V comparator. To monitor a higher voltage (e.g., 5V or 3.3V), connect an external resistive divider between the target rail and RSTIN so that the divided voltage equals 1.22V at the trip point. The MAX6356TWUT+T datasheet provides the exact formula: VEXT = 1.22V × (R1 + R2)/R2.
What is the reset output type and drive capability of the MAX6356TWUT+T?
The MAX6356TWUT+T features an active-low push-pull RST output referenced to VCC1. It sinks 1.2mA at VCC1 ≥ 2.7V (VOL ≤ 0.3V) and sources 350µA at VCC1 > VTH1(MAX) (VOH ≥ 0.8 × VCC1). This eliminates the need for external pull-up resistors and ensures fast, rail-to-rail reset signaling.
Is the MAX6356TWUT+T compatible with lead-free PCB assembly processes?
Yes, the MAX6356TWUT+T is RoHS-compliant and qualified for lead-free reflow soldering. The "+T" suffix explicitly denotes lead(Pb)-free packaging per Maxim Integrated's ordering nomenclature, and the device meets JEDEC J-STD-020 moisture sensitivity level 1 specifications.
MAX6356TWUT+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:
- 3
- Voltage - Threshold:
- 1.67V, 3.08V, 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
MAX6356TWUT+T FAQ
1.How can I place an order for MAX6356TWUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6356TWUT+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 MAX6356TWUT+T reliable?
The price and inventory of MAX6356TWUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6356TWUT+T is usually 5 days.
3.What payment methods are accepted for MAX6356TWUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6356TWUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6356TWUT+T?
MAX6356TWUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6356TWUT+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 MAX6356TWUT+T?
For technical support, including MAX6356TWUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6356TWUT+T requirements.
6.How does Aetrix verify that MAX6356TWUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6356TWUT+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 MAX6356TWUT+T meets industry standards.
7.What is the process for return or replacement of MAX6356TWUT+T?
All MAX6356TWUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6356TWUT+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 MAX6356TWUT+T part is unused and in its original packaging.
Return procedure for MAX6356TWUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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