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Analog Devices Inc./Maxim Integrated MAX6356SZUT
- Part No.:
- MAX6356SZUT
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6356SZUT.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MAX6356SZUT from Maxim Integrated is a triple-voltage microprocessor supervisory circuit with precision VCC1/VCC2 monitoring (2.93V/2.32V thresholds), active-low push-pull RST output referenced to VCC1, adjustable third-voltage input (RSTIN, 1.22V threshold), and guaranteed RESET validity down to VCC1 ≥ 1.0V or VCC2 ≥ 1.0V. It operates over –40°C to +85°C in a 6-pin SOT23 package and is used in multivoltage embedded systems requiring reliable power-on reset and undervoltage detection.
For engineers reviewing the MAX6356SZUT datasheet, MAX6356SZUT pinout, MAX6356SZUT application, or MAX6356SZUT equivalent, key selection criteria include its dual-supply threshold accuracy (±0.05V over temperature), 20µA supply current, 100ms minimum reset pulse width, and support for third-voltage monitoring via resistive divider on RSTIN.
Technical Context
The MAX6356SZUT integrates two independent voltage comparators for VCC1 and VCC2 monitoring, plus a dedicated 1.22V reference comparator for external RSTIN input. Reset assertion occurs if either VCC1 drops below 2.93V or VCC2 drops below 2.32V, or if RSTIN falls below 1.22V - all with 20ppm/°C tempco and 500mV hysteresis.
Its push-pull RST output is actively driven low when asserted and pulled high to VCC1 when inactive, eliminating external pull-up requirements. The device guarantees functional operation with either supply ≥1.0V, enabling robust brownout recovery in battery-backed or asymmetric power-rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.93V ±0.05V (factory-trimmed, supports +2.5V/+3.3V rail monitoring) |
| VCC2 Threshold | 2.32V ±0.05V (factory-trimmed, supports +2.5V/+3.0V rail monitoring) |
| RSTIN Threshold | 1.22V ±0.03V (enables precise third-voltage monitoring via external resistor divider) |
| Supply Current | 20µA typical (enables ultra-low-power operation in always-on supervision circuits) |
| Reset Pulse Width | 100ms minimum (ensures reliable µP initialization across slow-starting power supplies) |
| Operating Temp | –40°C to +85°C (fully specified for industrial-grade embedded applications) |
| Reset Validity | Guaranteed while VCC1 ≥ 1.0V or VCC2 ≥ 1.0V (supports deep brownout recovery without loss of reset state) |
Pinout & Package
MAX6356SZUT is housed in a 6-pin SOT23 package (U6-1 outline, 21-0058) with 0.95mm pitch, 2.9mm × 1.6mm footprint, and exposed pad option not applicable. Pin 1 is RST (active-low push-pull, 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), and Pin 6 is VCC1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low reset output | Push-pull driver referenced to VCC1; no external pull-up required; asserts when any monitored voltage fails |
| 2 - GND | Ground reference | Common return for all internal comparators and logic; must be low-impedance connection |
| 3 - MR | Manual-reset input | Debounced TTL/CMOS-compatible input; forces reset when pulled low; glitch rejection ≥100ns |
| 4 - VCC2 | Secondary supply input | Monitors second voltage rail (2.32V threshold); powers internal circuitry when VCC2 > VCC1 |
| 5 - RSTIN | Third-voltage monitor input | Accepts external voltage via resistor divider; triggers reset if input <1.22V; powered by VCC1 |
| 6 - VCC1 | Primary supply input | Monitors primary voltage rail (2.93V threshold); powers internal circuitry when VCC1 > VCC2 |
Key Features
| Feature | Design Value |
|---|---|
| Dual factory-set voltage thresholds | 2.93V (VCC1) and 2.32V (VCC2) with ±0.05V tolerance over –40°C to +85°C ensures accurate multirail supervision without calibration |
| Adjustable third-voltage monitoring | RSTIN input with 1.22V internal reference enables monitoring of any voltage >1.22V using two external resistors - no additional ICs needed |
| Push-pull RST output referenced to VCC1 | Eliminates need for external pull-up resistor and reduces BOM count; compatible with standard µP reset inputs requiring active-low drive |
| Ultra-low quiescent current | 20µA typical supply current allows integration into battery-powered or energy-sensitive systems without impacting standby life |
| Brownout resilience | RESET remains valid as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V - critical for graceful shutdown during asymmetric supply collapse |
Applications
| Industrial PLC Power Management | Medical Diagnostic Equipment |
|---|---|
Use Scenario: Supervises dual 3.3V/2.5V rails powering FPGA, ADC, and communication interfaces in programmable logic controllers. IC Role / Device Role / Timing Role: Monitors VCC1 = 3.3V (threshold 2.93V) and VCC2 = 2.5V (threshold 2.32V), asserts RST if either rail sags, and uses RSTIN to verify auxiliary 1.8V bias supply via resistor divider. Use Value: Prevents firmware corruption during transient line dips by guaranteeing 100ms reset pulse and maintaining reset state down to 1.0V on either rail. | Use Scenario: Ensures safe boot and fault response in portable ultrasound units with battery-backed 3.0V system rail and 2.3V analog front-end supply. IC Role / Device Role / Timing Role: Tracks VCC1 = 3.0V (2.93V threshold) and VCC2 = 2.3V (2.32V threshold), while RSTIN monitors 1.2V reference via divider to validate sensor bias integrity before image acquisition. Use Value: Enables fail-safe shutdown at 1.0V supply level - preserving data integrity during rapid battery depletion without false resets. |
| Automotive Infotainment Head Unit | Network Router Power Sequencing |
Use Scenario: Manages power sequencing and fault detection across 5V USB interface, 3.3V SoC core, and 1.2V DDR memory rails in vehicle entertainment systems. IC Role / Device Role / Timing Role: Uses VCC1 (2.93V) to supervise 3.3V SoC rail, VCC2 (2.32V) for 2.5V I/O rail, and RSTIN to monitor 1.2V DDR termination voltage via precision divider. Use Value: Delivers automotive-grade reliability with –40°C to +85°C operation, 20ppm/°C threshold stability, and immunity to short transients per ISO 7637-2. | Use Scenario: Coordinates startup timing and monitors three independent rails (12V PoE input, 3.3V switch controller, 1.8V PHY) in enterprise-grade Ethernet switches. IC Role / Device Role / Timing Role: Configures VCC1 = 3.3V (2.93V threshold) for main logic, VCC2 = 1.8V (2.32V threshold mismatch handled by design margin), and RSTIN to verify 12V-to-3.3V converter output via high-ratio divider. Use Value: Reduces component count by replacing discrete supervisor + comparator + reference ICs with single 6-pin SOT23 solution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6355SZUT | Open-drain RST output (vs. push-pull in MAX6356SZUT); requires external pull-up resistor | Suitable where µP reset pin tolerates open-drain drive or where level-shifting is needed | Select MAX6355SZUT only if system design already includes pull-up or requires bidirectional reset bus sharing |
| TPS3808G33DBVR | Single-supply supervisor (3.3V only); no VCC2 or RSTIN inputs; 35µA supply current vs. 20µA | Lacks dual/third-voltage monitoring - requires additional supervisors for multirail systems | Choose TPS3808G33DBVR only for simple single-rail applications where cost-per-rail is prioritized over integration |
Compared with MAX6355SZUT and TPS3808G33DBVR, the MAX6356SZUT uniquely delivers integrated triple-voltage supervision in one 6-pin SOT23 with push-pull output and sub-25µA current - reducing PCB area, BOM count, and validation effort for multirail embedded designs.
Availability
MAX6356SZUT is available at Aetrix Electronics and suitable for industrial PLC power management, medical diagnostic equipment, automotive infotainment head units, and network router power sequencing requiring stable component supply and long-term lifecycle support.
Supply support for MAX6356SZUT 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 specifically for multivoltage microprocessor supervision in space-constrained, reliability-critical embedded systems - delivering precision threshold monitoring, low power, and extended temperature operation in minimal footprint.
FAQ
What voltage thresholds does the MAX6356SZUT monitor?
The MAX6356SZUT monitors VCC1 at 2.93V and VCC2 at 2.32V, both factory-trimmed with ±0.05V tolerance over –40°C to +85°C. Its RSTIN pin provides a third monitoring point with a fixed 1.22V threshold, enabling precise supervision of auxiliary voltages via an external resistor divider. These thresholds are confirmed in the Voltage-Threshold Levels table and Electrical Characteristics section of the MAX6356SZUT datasheet.
Does the MAX6356SZUT require an external pull-up resistor on its RST pin?
No, the MAX6356SZUT features an active-low push-pull RST output referenced to VCC1, which actively drives high when inactive - eliminating the need for an external pull-up resistor. This differs from open-drain variants like MAX6355SZUT and simplifies layout while ensuring clean, fast reset transitions. The MAX6356SZUT's RST output is fully specified for ISOURCE up to 800µA in the (_T/_S/_R) versions.
Can the MAX6356SZUT monitor a 5V supply?
No, the MAX6356SZUT is not configured to monitor a 5V supply - its VCC1 threshold is fixed at 2.93V and VCC2 at 2.32V. To supervise a 5V rail, a different variant such as MAX6351LTUT (4.63V/3.08V) would be required. The MAX6356SZUT's thresholds are permanently set by its suffix "SZ" per the Voltage-Threshold Levels table and cannot be adjusted externally.
What is the minimum supply voltage required for the MAX6356SZUT to maintain valid reset output?
The MAX6356SZUT guarantees valid RESET output as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V - a key specification enabling robust brownout recovery. This behavior is explicitly stated in the Absolute Maximum Ratings and Electrical Characteristics tables, and verified across the full –40°C to +85°C operating range. Below 1.0V on both rails, reset state is no longer guaranteed.
Is the MAX6356SZUT RoHS-compliant and available in lead-free packaging?
Yes, the MAX6356SZUT is RoHS-compliant. Per Maxim Integrated's ordering information, lead-free versions are indicated by replacing the "-T" suffix with "+T" (e.g., MAX6356SZUT+T). The device is offered in both leaded and lead(Pb)-free packaging, and the "+" character in the package code denotes RoHS status. Footprint and land pattern remain identical between versions (U6-1 outline, 21-0058).
MAX6356SZUT 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:
- 2.32V, 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
MAX6356SZUT FAQ
1.How can I place an order for MAX6356SZUT through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6356SZUT 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 MAX6356SZUT reliable?
The price and inventory of MAX6356SZUT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6356SZUT is usually 5 days.
3.What payment methods are accepted for MAX6356SZUT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6356SZUT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6356SZUT?
MAX6356SZUT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6356SZUT 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 MAX6356SZUT?
For technical support, including MAX6356SZUT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6356SZUT requirements.
6.How does Aetrix verify that MAX6356SZUT is sourced from the original manufacturer or authorized distributors?
All MAX6356SZUT 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 MAX6356SZUT meets industry standards.
7.What is the process for return or replacement of MAX6356SZUT?
All MAX6356SZUT units undergo pre-shipment inspection (PSI). If there is an issue with MAX6356SZUT, 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 MAX6356SZUT part is unused and in its original packaging.
Return procedure for MAX6356SZUT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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