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Analog Devices Inc./Maxim Integrated MAX6357SWUT
- Part No.:
- MAX6357SWUT
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6357SWUT.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,785
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Product details
Overview
MAX6357SWUT from Maxim Integrated is a triple-voltage microprocessor supervisory circuit with dual supply monitoring (VCC1/VCC2) and an adjustable third-voltage input (RSTIN), featuring active-low push-pull reset referenced to VCC2, 2.93V/1.67V factory-set thresholds, 20µA supply current, and guaranteed RESET validity down to VCC1 or VCC2 = 1.0V. It supports multivoltage embedded systems requiring coordinated reset assertion across +3.3V, +2.5V, and sub-2V rails.
For engineers reviewing the MAX6357SWUT datasheet, MAX6357SWUT pinout, MAX6357SWUT application, or MAX6357SWUT equivalent, this device is selected for precise dual-supply fault detection with third-rail monitoring capability, low-quiescent-current supervision in space-constrained SOT23-6 designs, and compatibility with battery-backed or low-voltage microcontroller reset sequencing.
Technical Context
The MAX6357SWUT integrates two precision voltage comparators for VCC1 and VCC2 monitoring plus a dedicated RSTIN input with 1.22V internal reference, enabling external resistive divider-based threshold setting for a third supply rail. Its reset generator asserts active-low RST2 when either monitored supply drops below its factory-trimmed threshold or RSTIN falls below 1.22V.
It operates over -40°C to +85°C with full electrical specifications guaranteed, includes debounced TTL/CMOS-compatible manual-reset input (MR), and maintains valid reset output as long as at least one supply remains ≥1.0V - critical for brownout resilience in portable and industrial systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.93V ±0.05V at +25°C; factory-trimmed for stable trip point across temperature |
| VCC2 Threshold | 1.67V ±0.03V at +25°C; enables supervision of low-voltage auxiliary rails like 1.8V or 1.5V domains |
| RSTIN Reference | 1.22V ±0.03V; allows monitoring of third voltage via external resistor divider (e.g., 3.3V, 2.5V, or custom rail) |
| Supply Current | 20µA typical; ensures minimal battery drain in always-on supervision applications |
| Reset Pulse Width | 100ms minimum; meets μP power-on reset timing requirements without external RC |
| Operating Temp | -40°C to +85°C; fully specified for industrial and extended-temperature embedded use |
| RESET Validity | Guaranteed down to VCC1 ≥ 1.0V or VCC2 ≥ 1.0V; supports deep brownout detection |
Pinout & Package
MAX6357SWUT is housed in a 6-pin SOT23 package (U6-1 outline), surface-mount, RoHS-compliant, with 0.95mm pitch and 2.9mm × 1.6mm footprint. Pin 1 is RST2 (active-low push-pull output referenced to VCC2), Pin 2 is GND, Pin 3 is MR (manual-reset input), Pin 4 is VCC2, Pin 5 is RSTIN (adjustable comparator input), and Pin 6 is VCC1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RST2) | Active-low push-pull reset output | Referenced to VCC2; drives low during fault or MR assertion; no external pull-up required |
| 2 (GND) | Ground reference | Common return path for all internal circuits and reset outputs |
| 3 (MR) | Debounced manual-reset input | Pull low to force reset; internally debounced; valid at VCC1 ≥ 1.0V |
| 4 (VCC2) | Secondary supply input & monitor rail | Power source and monitored voltage; threshold = 1.67V; powers internal logic when > VCC1 |
| 5 (RSTIN) | Adjustable undervoltage comparator input | Monitors third rail via 1.22V internal reference; requires external resistive divider for voltages >1.22V |
| 6 (VCC1) | Primary supply input & monitor rail | Power source and monitored voltage; threshold = 2.93V; powers internal logic when > VCC2 |
Key Features
| Feature | Design Value |
|---|---|
| Dual fixed-threshold voltage monitoring | Simultaneously supervises VCC1 = 2.93V and VCC2 = 1.67V with ±0.05V accuracy at +25°C |
| Third-rail adjustable monitoring | RSTIN input with 1.22V internal reference enables precise supervision of any voltage ≥1.22V using two external resistors |
| Push-pull RST2 output referenced to VCC2 | Eliminates need for external pull-up resistor; compatible with 1.67V–5.5V logic domains |
| Ultra-low quiescent current | 20µA typical supply current extends battery life in portable and energy-sensitive applications |
| Full temperature specification | All electrical parameters guaranteed over -40°C to +85°C - no derating or interpolation needed |
Applications
| Industrial PLC Power Sequencing | Portable Medical Sensor Node |
|---|---|
Use Scenario: Coordinated startup and fault response across 3.3V I/O, 1.8V core, and 1.2V analog rails in programmable logic controllers. IC Role / Device Role / Timing Role: Triple-rail supervisor asserting synchronized reset to MCU and FPGA upon any rail dropout, with RSTIN configured for 1.2V analog domain. Use Value: Prevents partial initialization and latch-up by ensuring all subsystems reset together under multi-rail brownout conditions. | Use Scenario: Battery-powered wearable sensor with 3.0V BLE radio, 1.8V MCU, and 1.5V ADC - requiring low-power supervision with deep brownout detection. IC Role / Device Role / Timing Role: Monitors VCC1 = 3.0V (BLE), VCC2 = 1.5V (ADC), and RSTIN = 1.8V (MCU core) via divider; asserts RST2 to halt system before data corruption. Use Value: 20µA quiescent current and 1.0V reset validity extend operational time between battery charges while maintaining safe shutdown. |
| Automotive Body Control Module | Industrial IoT Edge Gateway |
Use Scenario: Supervision of 5V CAN transceiver, 3.3V microcontroller, and 2.5V sensor interface in harsh automotive environments. IC Role / Device Role / Timing Role: Uses VCC1 = 2.93V (3.3V rail), VCC2 = 1.67V (2.5V rail), and RSTIN configured for 5V CAN supply; RST2 drives 3.3V reset line. Use Value: Guaranteed operation to -40°C/+85°C and transient-immune design ensure reliable reset during cold cranking or load dump events. | Use Scenario: Remote gateway with dual-core processor (1.1V core, 1.8V I/O) and 3.3V wireless module operating in uncontrolled ambient conditions. IC Role / Device Role / Timing Role: Configures VCC1 = 2.93V (3.3V wireless), VCC2 = 1.67V (1.8V I/O), RSTIN for 1.1V core via divider; RST2 resets entire SoC on any rail failure. Use Value: Eliminates need for three discrete supervisors, reducing BOM count and PCB area while maintaining independent threshold control per rail. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6356SWUT | Same package and thresholds, but RST1 output referenced to VCC1 instead of RST2 to VCC2 | Requires reset signal referenced to primary rail (VCC1); unsuitable if system reset must be level-shifted to VCC2 domain | Select MAX6356SWUT only when reset assertion must track VCC1 logic levels |
| TPS3808G33DBVR | Single-supply supervisor (3.3V only); no RSTIN or dual-rail monitoring; 1.8µA IQ; SOT23-6 | Lacks third-rail monitoring and dual-supply coordination; suitable only for single-rail systems | Choose TPS3808G33DBVR only when supervising one rail and ultra-low IQ is critical |
Compared with MAX6356SWUT, MAX6357SWUT provides VCC2-referenced reset ideal for systems where the reset signal must interface directly with peripherals powered by VCC2; versus TPS3808G33DBVR, it delivers true triple-rail supervision with configurable thresholds - essential for multivoltage SoC platforms.
Availability
MAX6357SWUT is available at Aetrix Electronics and suitable for industrial PLC power sequencing, portable medical sensor nodes, automotive body control modules, and industrial IoT edge gateways requiring stable component supply, long-lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for MAX6357SWUT 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 product line delivers precision multivoltage supervision for complex embedded systems, designed to replace discrete solutions with integrated, low-power, temperature-stable reset generation across multiple supply domains.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6357SWUT?
The MAX6357SWUT has a factory-set VCC1 threshold of 2.93V (±0.05V at +25°C) and VCC2 threshold of 1.67V (±0.03V at +25°C), both guaranteed over -40°C to +85°C. These values correspond to the "SW" suffix in the Voltage Threshold Levels table and are laser-trimmed for high accuracy without external calibration.
How does the RSTIN pin function on the MAX6357SWUT, and what voltage can it monitor?
The RSTIN pin on the MAX6357SWUT is an adjustable comparator input with a precise 1.22V internal reference. It monitors a third voltage rail by comparing the divided input against this reference - for example, a 3.3V rail can be supervised using a 1.7MΩ/1.0MΩ resistor divider. RSTIN must remain ≤ VCC1 and draws <25nA, enabling high-impedance sensing.
Is the MAX6357SWUT pin-compatible with other devices in the MAX6351–MAX6360 family?
Yes, the MAX6357SWUT uses the same 6-pin SOT23 (U6-1) package and pinout as MAX6355UT-T, MAX6356UT-T, MAX6358UT-T, MAX6359UT-T, and MAX6360UT-T. Pin 1 = RST2, Pin 2 = GND, Pin 3 = MR, Pin 4 = VCC2, Pin 5 = RSTIN, Pin 6 = VCC1 - consistent across all 6-pin variants regardless of reset output reference or feature set.
Does the MAX6357SWUT include a watchdog timer function?
No, the MAX6357SWUT does not include a watchdog timer. Watchdog functionality is exclusive to MAX6358/MAX6359/MAX6360 variants. The MAX6357SWUT provides triple-voltage supervision (VCC1, VCC2, RSTIN) and manual reset only - confirmed by its absence in the Selector Guide and Pin Configurations table for WDI pin assignment.
What is the minimum supply voltage required for the MAX6357SWUT to assert a valid reset output?
The MAX6357SWUT guarantees valid reset output (RST2) as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V - verified in Absolute Maximum Ratings and Electrical Characteristics. This enables reliable brownout detection even during deep discharge of backup batteries or unstable power-up sequences, a key differentiator from single-supply supervisors.
MAX6357SWUT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- 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-23-6
MAX6357SWUT FAQ
1.How can I place an order for MAX6357SWUT through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6357SWUT 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 MAX6357SWUT reliable?
The price and inventory of MAX6357SWUT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6357SWUT is usually 5 days.
3.What payment methods are accepted for MAX6357SWUT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6357SWUT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6357SWUT?
MAX6357SWUT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6357SWUT 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 MAX6357SWUT?
For technical support, including MAX6357SWUT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6357SWUT requirements.
6.How does Aetrix verify that MAX6357SWUT is sourced from the original manufacturer or authorized distributors?
All MAX6357SWUT 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 MAX6357SWUT meets industry standards.
7.What is the process for return or replacement of MAX6357SWUT?
All MAX6357SWUT units undergo pre-shipment inspection (PSI). If there is an issue with MAX6357SWUT, 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 MAX6357SWUT part is unused and in its original packaging.
Return procedure for MAX6357SWUT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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