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Analog Devices Inc./Maxim Integrated MAX6357SYUT+T
- Part No.:
- MAX6357SYUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6357SYUT+T.pdf
- Description:
- IC SUPERVISOR MPU SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,925
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Product details
Overview
The MAX6357SYUT+T from Maxim Integrated is a triple-voltage microprocessor supervisory circuit with active-low push-pull reset output referenced to VCC2, 2.93V VCC1 threshold, 2.19V VCC2 threshold, and integrated 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 supports multivoltage embedded systems requiring precise power-rail sequencing and fault detection.
For engineers reviewing the MAX6357SYUT+T datasheet, MAX6357SYUT+T pinout, MAX6357SYUT+T application, or MAX6357SYUT+T equivalent, this page delivers verified electrical parameters, confirmed pin functions, real-world use cases in battery-powered instrumentation and industrial controllers, and validated alternative parts with documented functional and interface differences.
Technical Context
The MAX6357SYUT+T monitors three supply rails: VCC1 (2.93V threshold), VCC2 (2.19V threshold), and an external voltage via RSTIN (1.22V comparator input). Reset assertion occurs if any monitored rail falls below its threshold, and the active-low RST2 output remains valid as long as either VCC1 or VCC2 exceeds 1.0V.
It features a debounced manual-reset input (MR), guaranteed 100ms minimum reset pulse width, 20μA total supply current, and full temperature-range operation (–40°C to +85°C). Unlike watchdog-equipped variants (MAX6358/59/60), the MAX6357SYUT+T omits WDI functionality - confirmed by pin configuration and selector guide.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.93V ±0.05V at +25°C; ensures reliable reset assertion when primary supply drops below nominal 2.93V rail |
| VCC2 Threshold | 2.19V ±0.03V at +25°C; enables accurate supervision of secondary 2.19V domain (e.g., I/O or analog subsystem) |
| RSTIN Threshold | 1.22V ±0.03V; allows third-rail monitoring (e.g., 1.2V core) using external resistive divider |
| Reset Pulse Width | 100–280ms; guarantees sufficient duration to fully reset microcontrollers and peripheral logic |
| Supply Current | 20μA typical; enables ultra-low-power operation in battery-backed or energy-constrained systems |
| Operating Temp | –40°C to +85°C; qualified for industrial and extended-temperature embedded applications |
| Package | 6-pin SOT23; surface-mount footprint compatible with automated PCB assembly and space-constrained designs |
Pinout & Package
Package: 6-pin SOT23 (U6-1 outline, land pattern 90-0175), RoHS-compliant, lead(Pb)-free (indicated by "+T" suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST2 | Active-low push-pull reset output referenced to VCC2; drives low without external pull-up; asserts when VCC1, VCC2, or RSTIN falls below threshold |
| 2 | GND | Ground reference for all internal circuitry and reset outputs |
| 3 | MR | Debounced manual-reset input; pulled high internally (~63.5kΩ); falling edge forces reset for ≥1µs |
| 4 | VCC2 | Secondary supply input and monitoring rail; powers device when > VCC1; threshold = 2.19V |
| 5 | RSTIN | Adjustable reset comparator input; 1.22V internal reference; accepts external voltage via resistive divider |
| 6 | VCC1 | Primary supply input and monitoring rail; powers device when > VCC2; threshold = 2.93V |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage monitoring | Simultaneously supervises VCC1 (2.93V), VCC2 (2.19V), and third rail via RSTIN (1.22V), eliminating need for discrete comparators in multirail systems |
| Push-pull RST2 output | Active-low output referenced to VCC2 removes dependency on external pull-up resistor, simplifying BOM and improving noise immunity |
| Guaranteed reset validity down to 1.0V | Ensures correct reset state even as either VCC1 or VCC2 decays to 1.0V, supporting graceful shutdown in brownout conditions |
| Low 20μA quiescent current | Minimizes standby power draw in always-on or battery-operated equipment such as portable data loggers and sensor nodes |
| Factory-trimmed thresholds | 2.93V and 2.19V thresholds are laser-trimmed for ±1.7% accuracy over temperature, reducing calibration overhead |
Applications
| Industrial Controllers | Battery-Powered Instrumentation |
|---|---|
Use Scenario: PLC I/O modules with dual 3.3V/2.2V power domains and FPGA core voltage monitoring. IC Role / Device Role / Timing Role: Supervises VCC1 (2.93V), VCC2 (2.19V), and FPGA core rail (1.2V via RSTIN) to assert system-wide reset on any undervoltage event. Use Value: Prevents corrupted register states and metastability during partial power loss, ensuring deterministic recovery without firmware intervention. | Use Scenario: Handheld gas analyzer with 2.9V main rail, 2.2V sensor bias rail, and 1.2V ADC reference. IC Role / Device Role / Timing Role: Monitors all three rails and triggers RST2 to hold MCU in reset until all supplies stabilize post-battery insertion or wake-up. Use Value: Eliminates spurious startup due to uneven rail ramp-up, extending usable battery life by avoiding failed boot cycles. |
| Intelligent Power Meters | Multivoltage Embedded Gateways |
Use Scenario: ANSI C12.22-compliant meter with isolated 3.0V communication rail, 2.2V RTC backup, and 1.2V metrology ASIC supply. IC Role / Device Role / Timing Role: Uses RSTIN to monitor 1.2V metrology rail while VCC1/VCC2 supervise communication and RTC domains; RST2 resets entire system on first fault. Use Value: Meets ANSI/IEC brownout immunity requirements by guaranteeing reset assertion within 280ms of threshold breach. | Use Scenario: Edge gateway with 3.0V SoC core, 2.2V Wi-Fi module, and 1.2V security co-processor. IC Role / Device Role / Timing Role: Provides centralized, single-chip supervision of all three critical rails; RST2 output interfaces directly to SoC's reset pin without level-shifting. Use Value: Reduces component count vs. dual-supervisor solutions, lowering PCB area and qualification effort for UL/CE safety certification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6356SYUT+T | Same thresholds (2.93V/2.19V), but RST1 output referenced to VCC1 instead of RST2 referenced to VCC2 | Used where reset must be asserted relative to primary supply (VCC1) rather than secondary (VCC2) | Select MAX6356SYUT+T when interfacing with MCUs requiring VCC1-referenced reset signaling |
| TPS3808G33DBVR | Single-supply supervisor (3.3V only); no RSTIN input or dual-threshold capability; 350ms reset timeout | Only suitable for single-rail systems; cannot replace MAX6357SYUT+T in triple-monitoring roles | Choose only for cost-sensitive, single-voltage applications where third-rail monitoring is unnecessary |
Compared with MAX6357SYUT+T, MAX6356SYUT+T provides identical voltage thresholds but shifts reset assertion reference from VCC2 to VCC1 - critical for compatibility with certain MCU reset input architectures - while TPS3808G33DBVR lacks multirail capability entirely and serves only basic single-supply supervision.
Availability
MAX6357SYUT+T is available at Aetrix Electronics and suitable for industrial controllers, battery-powered instrumentation, intelligent power meters, and multivoltage embedded gateways requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6357SYUT+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 highly integrated, factory-trimmed supervisory circuits optimized for reliability-critical multivoltage systems where simultaneous monitoring of two or three supply rails is required without external components.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6357SYUT+T?
The MAX6357SYUT+T has a VCC1 threshold of 2.93V, specified as 2.85V (min) to 3.00V (max) over the full –40°C to +85°C operating temperature range. This value is factory-laser-trimmed and confirmed in the Voltage Threshold Levels table and Electrical Characteristics section of the official datasheet. The "SY" suffix explicitly denotes the 2.93V/2.19V threshold pair.
Does the MAX6357SYUT+T include a watchdog timer function?
No, the MAX6357SYUT+T does not include a watchdog timer. Watchdog functionality is exclusive to the MAX6358/MAX6359/MAX6360 variants, as confirmed by the Selector Guide and Pin Configurations table. The MAX6357SYUT+T pin 5 is RSTIN (third-voltage monitor input), not WDI, and its functional description makes no mention of timeout or watchdog behavior.
What is the purpose of the RSTIN pin on the MAX6357SYUT+T?
The RSTIN pin on the MAX6357SYUT+T is an adjustable reset comparator input with a fixed 1.22V internal reference. It enables monitoring of a third voltage rail (e.g., 1.2V core supply) using an external resistive divider. When the divided voltage at RSTIN falls below 1.22V, the device asserts RST2 - allowing single-chip supervision of three independent power domains without additional comparators.
Can the MAX6357SYUT+T operate with VCC1 and VCC2 voltages below 2.0V?
Yes, the MAX6357SYUT+T supports VCC1 and VCC2 down to 1.2V over temperature (–40°C to +85°C), per Absolute Maximum Ratings and Electrical Characteristics. Its reset outputs remain valid as long as either supply stays above 1.0V, enabling use in low-voltage systems such as 1.8V/1.2V FPGA platforms - though actual threshold accuracy is guaranteed only within the specified 1.2V–5.5V operating range.
Is the MAX6357SYUT+T pin-compatible with other devices in the MAX6351–MAX6360 family?
The MAX6357SYUT+T uses the same 6-pin SOT23 (U6-1) package and pinout as MAX6355/MAX6356/MAX6358–MAX6360, with pin 1 = RST2, pin 5 = RSTIN, and pin 6 = VCC1. However, it is not functionally interchangeable with open-drain variants (e.g., MAX6355) or watchdog-enabled parts (e.g., MAX6358), as output drive type and feature set differ despite identical physical layout.
MAX6357SYUT+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:
- 2.19V, 2.93V
- 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
MAX6357SYUT+T FAQ
1.How can I place an order for MAX6357SYUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6357SYUT+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 MAX6357SYUT+T reliable?
The price and inventory of MAX6357SYUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6357SYUT+T is usually 5 days.
3.What payment methods are accepted for MAX6357SYUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6357SYUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6357SYUT+T?
MAX6357SYUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6357SYUT+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 MAX6357SYUT+T?
For technical support, including MAX6357SYUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6357SYUT+T requirements.
6.How does Aetrix verify that MAX6357SYUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6357SYUT+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 MAX6357SYUT+T meets industry standards.
7.What is the process for return or replacement of MAX6357SYUT+T?
All MAX6357SYUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6357SYUT+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 MAX6357SYUT+T part is unused and in its original packaging.
Return procedure for MAX6357SYUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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