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Analog Devices Inc./Maxim Integrated MAX6357SVUT+T
- Part No.:
- MAX6357SVUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6357SVUT+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
The MAX6357SVUT+T from Maxim Integrated is a triple-voltage microprocessor supervisory circuit with active-low push-pull reset output referenced to VCC2, factory-set VCC1 threshold of 2.93V and VCC2 threshold of 1.58V, 100ms minimum reset timeout, and support for third-voltage monitoring via RSTIN (1.22V threshold). It operates over –40°C to +85°C in 6-pin SOT23 and ensures valid reset assertion as long as either supply remains ≥1.0V - ideal for multivoltage embedded controllers requiring reliable power sequencing and brownout detection.
For engineers reviewing the MAX6357SVUT+T datasheet, MAX6357SVUT+T pinout, MAX6357SVUT+T application, or MAX6357SVUT+T equivalent, key selection criteria include its dual-supply monitoring capability (VCC1/VCC2), integrated third-voltage comparator input (RSTIN), guaranteed reset validity down to 1.0V on either supply rail, and compatibility with systems requiring precise 2.93V/1.58V trip points without external components.
Technical Context
The MAX6357SVUT+T implements a precision dual-threshold voltage monitor with independent VCC1 and VCC2 inputs, where reset is asserted if either supply drops below its respective factory-trimmed threshold (2.93V and 1.58V). Its RSTIN pin provides a dedicated 1.22V reference for monitoring a third voltage via external resistive divider, enabling flexible system-level undervoltage supervision beyond the two primary rails.
Reset generation uses an internal timer ensuring ≥100ms pulse width after any threshold violation, with hysteresis and transient immunity designed to reject short-duration supply glitches. The device guarantees functional operation across –40°C to +85°C and maintains valid reset output state as long as either VCC1 or VCC2 remains ≥1.0V - critical for robust boot and runtime fault detection in battery-powered and industrial equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.93V ±0.05V at +25°C; factory-trimmed for accurate 2.93V supply monitoring with 20ppm/°C tempco |
| VCC2 Threshold | 1.58V ±0.03V at +25°C; factory-trimmed for accurate 1.58V supply monitoring with 20ppm/°C tempco |
| RSTIN Threshold | 1.22V ±0.03V; enables third-voltage monitoring (e.g., 3.3V or 5V rail) using external resistor divider |
| Reset Timeout | 100–280ms; ensures sufficient processor reset hold time during power-up or brownout recovery |
| Supply Current | 20µA typical; ultra-low quiescent current supports long battery life in portable applications |
| Operating Temp | –40°C to +85°C; fully specified across industrial temperature range without derating |
| Reset Output | Active-low push-pull referenced to VCC2; drives low to ≤0.3V at 50µA sink, eliminating need for external pull-up |
Pinout & Package
MAX6357SVUT+T is housed in a 6-pin SOT23 package (U6-1 outline, land pattern 90-0175), with pin 1 designated as RST2 (active-low push-pull reset referenced to VCC2), pin 2 as GND, pin 3 as MR (debounced manual-reset input), pin 4 as VCC2, pin 5 as RSTIN (third-voltage comparator input), and pin 6 as VCC1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RST2) | Active-low reset output | Push-pull driver referenced to VCC2; asserts low when VCC1 < 2.93V or VCC2 < 1.58V or RSTIN < 1.22V |
| 2 (GND) | Ground reference | Common return path for all internal circuits and reset output; must be low-impedance connection |
| 3 (MR) | Manual reset input | Debounced TTL/CMOS-compatible input; pulling low forces reset regardless of supply conditions |
| 4 (VCC2) | Secondary supply input | Powers device when > VCC1; monitored at 1.58V threshold; also serves as RST2 output reference rail |
| 5 (RSTIN) | Third-voltage monitor input | 1.22V comparator input; accepts external resistive divider to monitor voltages >1.22V (e.g., 3.3V, 5V) |
| 6 (VCC1) | Primary supply input | Powers device when > VCC2; monitored at 2.93V threshold; supplies bias for RSTIN and MR circuits |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage supervision | Monitors VCC1 (2.93V), VCC2 (1.58V), and third voltage via RSTIN (1.22V reference) - eliminates need for separate supervisors in multirail systems |
| Factory-trimmed thresholds | ±0.05V accuracy at +25°C with 20ppm/°C tempco ensures stable trip points across temperature without calibration |
| Guaranteed reset validity to 1.0V | RESET remains valid as long as either VCC1 ≥1.0V or VCC2 ≥1.0V - critical for deep brownout detection and graceful shutdown |
| No external components required | Integrated precision comparators, glitch-filtered MR, and push-pull RST2 eliminate external resistors, capacitors, or pull-ups in standard configurations |
| Low-power operation | 20µA typical supply current enables use in always-on battery-backed systems without compromising runtime |
Applications
| Industrial PLC Controller | Portable Medical Monitor |
|---|---|
Use Scenario: Supervises 3.3V logic rail (VCC1), 1.8V core rail (VCC2), and 5V analog sensor supply (via RSTIN) in a compact programmable logic controller. IC Role / Device Role / Timing Role: Triple-rail voltage supervisor providing synchronized reset assertion and brownout detection across all critical subsystems. Use Value: Prevents erratic operation during partial power loss by asserting reset only when any monitored rail falls below its precise threshold - reducing field failures by eliminating race conditions between rail collapses. | Use Scenario: Monitors main Li-ion battery (VCC1 = 3.3V), low-power MCU core (VCC2 = 1.58V), and ECG front-end analog supply (RSTIN-derived 2.5V) in a handheld diagnostic device. IC Role / Device Role / Timing Role: Power integrity guardian ensuring safe shutdown before battery sag causes data corruption or sensor malfunction. Use Value: Enables reliable operation down to 1.0V on either supply rail - extending usable battery life while guaranteeing deterministic reset behavior during discharge. |
| Automotive Body Control Module | Smart Energy Meter |
Use Scenario: Supervises 5V microcontroller supply (VCC1), 3.3V CAN transceiver rail (VCC2), and 12V battery backup (via RSTIN) in a vehicle body control unit operating across wide temperature ranges. IC Role / Device Role / Timing Role: Fault-tolerant voltage monitor with industrial-grade tempco and transient immunity for automotive environments. Use Value: Rejects short-duration load-dump transients while maintaining accurate trip points - meeting AEC-Q100 stress requirements without additional filtering. | Use Scenario: Monitors 3.3V metering SoC supply (VCC1), 1.58V RTC backup rail (VCC2), and 5V isolated communication interface (RSTIN) in a utility-grade smart electricity meter. IC Role / Device Role / Timing Role: High-reliability power supervisor ensuring data integrity during grid fluctuations and battery switchover events. Use Value: Guarantees ≥100ms reset pulse width and valid output down to 1.0V - preventing firmware corruption during brief AC interruptions or capacitor discharge cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6356SVUT+T | Same VCC1/VCC2 thresholds (2.93V/1.58V), but RST1 output referenced to VCC1 instead of VCC2; no RSTIN pin | Designed for systems where reset must be referenced to primary supply (VCC1); lacks third-voltage monitoring capability | Select MAX6356SVUT+T only if RSTIN functionality is unnecessary and VCC1-referenced reset is preferred |
| TPS3808G33DBVR | Single-supply supervisor (3.3V threshold only); no VCC2 or RSTIN inputs; 200ms fixed reset timeout; 2.5µA supply current | Supports only one monitored rail; requires external circuitry for dual/third-rail supervision | Choose TPS3808G33DBVR only for cost-sensitive single-rail applications where triple-voltage capability is not required |
Compared with MAX6357SVUT+T, MAX6356SVUT+T offers identical voltage thresholds but omits RSTIN and references reset to VCC1 - making it suitable only for dual-rail systems without third-voltage needs. TPS3808G33DBVR provides lower quiescent current but cannot replace MAX6357SVUT+T in triple-rail architectures without adding discrete components and increasing BOM count.
Availability
MAX6357SVUT+T is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, automotive body control modules, smart energy meters, and multivoltage embedded systems requiring stable component supply and guaranteed long-term availability.
Supply support for MAX6357SVUT+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 family was designed to replace discrete supervisory solutions in multivoltage systems - delivering precision dual/third-rail monitoring, low-power operation, and industrial-temperature reliability in minimal SOT23 footprints.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6357SVUT+T?
The MAX6357SVUT+T has a factory-trimmed VCC1 threshold of 2.93V (±0.05V at +25°C) and a VCC2 threshold of 1.58V (±0.03V at +25°C), both specified across –40°C to +85°C with 20ppm/°C tempco. These values are confirmed in the Voltage Threshold Levels table and Electrical Characteristics section of the official datasheet. The "SV" suffix directly encodes these thresholds.
Does the MAX6357SVUT+T support monitoring a third voltage, and how is it implemented?
Yes, the MAX6357SVUT+T supports third-voltage monitoring via its RSTIN pin, which features a precise 1.22V ±0.03V internal reference. To monitor higher voltages (e.g., 3.3V or 5V), connect an external resistive divider between the target rail and RSTIN, with the divider ratio calculated as VEXT = 1.22V × (R1 + R2)/R2. RSTIN is powered by VCC1 and must not exceed VCC1 voltage.
What is the function and electrical specification of the RST2 output on the MAX6357SVUT+T?
The RST2 output on the MAX6357SVUT+T is an active-low push-pull reset signal referenced to VCC2. It asserts low when any monitored condition occurs: VCC1 < 2.93V, VCC2 < 1.58V, or RSTIN < 1.22V. It sinks ≤0.3V at 50µA load across temperature and requires no external pull-up resistor, simplifying PCB layout and reducing component count.
How does the MAX6357SVUT+T ensure reset validity during deep brownout conditions?
The MAX6357SVUT+T guarantees valid reset output as long as either VCC1 ≥1.0V or VCC2 ≥1.0V - a key design feature documented in Absolute Maximum Ratings and Electrical Characteristics. This allows reliable reset assertion even during severe supply sags where traditional supervisors fail, supporting graceful shutdown and data retention in battery-powered and industrial systems.
Is the MAX6357SVUT+T pin-compatible with other devices in the MAX6351–MAX6360 family?
The MAX6357SVUT+T uses the standard 6-pin SOT23 (U6-1) package and shares identical pinout with MAX6355/MAX6356/MAX6358–MAX6360 variants: Pin 1 = RST2, Pin 2 = GND, Pin 3 = MR, Pin 4 = VCC2, Pin 5 = RSTIN, Pin 6 = VCC1. However, functional differences exist - e.g., MAX6355 has open-drain RST, MAX6358 has WDI instead of RSTIN - so electrical compatibility must be verified per application.
MAX6357SVUT+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:
- 1.58V, 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
MAX6357SVUT+T FAQ
1.How can I place an order for MAX6357SVUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6357SVUT+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 MAX6357SVUT+T reliable?
The price and inventory of MAX6357SVUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6357SVUT+T is usually 5 days.
3.What payment methods are accepted for MAX6357SVUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6357SVUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6357SVUT+T?
MAX6357SVUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6357SVUT+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 MAX6357SVUT+T?
For technical support, including MAX6357SVUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6357SVUT+T requirements.
6.How does Aetrix verify that MAX6357SVUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6357SVUT+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 MAX6357SVUT+T meets industry standards.
7.What is the process for return or replacement of MAX6357SVUT+T?
All MAX6357SVUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6357SVUT+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 MAX6357SVUT+T part is unused and in its original packaging.
Return procedure for MAX6357SVUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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