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Analog Devices Inc./Maxim Integrated MAX6356SVUT+T
- Part No.:
- MAX6356SVUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6356SVUT+T.pdf
- Description:
- IC SUPERVISOR MPU SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6356SVUT+T from Maxim Integrated is a triple-voltage microprocessor supervisory circuit with precision VCC1/VCC2 monitoring and an adjustable third-voltage input (RSTIN). It features active-low push-pull reset referenced to VCC1, 2.93V/1.58V factory-set thresholds, 20µA supply current, and operates from -40°C to +85°C in a 6-pin SOT23 package. It is used in multivoltage embedded systems requiring reliable power-on reset and undervoltage detection.
For engineers reviewing the MAX6356SVUT+T datasheet, MAX6356SVUT+T pinout, MAX6356SVUT+T application, or MAX6356SVUT+T equivalent, this page delivers verified electrical parameters, validated pin functions, confirmed triple-supply supervision capability, and real-world design context for industrial controllers and battery-powered instrumentation.
Technical Context
The MAX6356SVUT+T monitors three voltage rails: VCC1 (2.93V threshold), VCC2 (1.58V threshold), and a third via RSTIN with a fixed 1.22V comparator reference. Its reset output is push-pull, referenced to VCC1, and remains valid as long as either VCC1 ≥ 1.2V or VCC2 ≥ 1.2V.
It includes a debounced manual-reset input (MR) and supports external resistive divider configuration on RSTIN to monitor voltages above 1.22V. No watchdog timer or WDI functionality is present - that is exclusive to MAX6358/MAX6359/MAX6360 variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.93V ±0.05V at +25°C; guaranteed 2.85V–3.00V over -40°C to +85°C - sets precise reset point for primary supply |
| VCC2 Threshold | 1.58V ±0.03V at +25°C; guaranteed 1.53V–1.62V over temperature - enables low-voltage rail supervision (e.g., 1.8V LDO output) |
| RSTIN Threshold | 1.22V ±0.03V at +25°C; 1.19V–1.25V over temperature - allows configurable third-rail monitoring via external resistor divider |
| Supply Current | 20µA typical (VCC1=5.5V, VCC2=3.6V); ensures minimal loading on battery-backed or low-power systems |
| Reset Pulse Width | 100ms minimum - meets JEDEC JESD8-12B requirement for reliable processor initialization |
| Operating Temp | -40°C to +85°C - qualified for industrial-grade embedded applications without derating |
| Reset Output Type | Active-low push-pull referenced to VCC1 - eliminates need for external pull-up and drives directly into CMOS inputs |
Pinout & Package
MAX6356SVUT+T is housed in a RoHS-compliant 6-pin SOT23 package (U6-1 outline, 90-0175 land pattern), with 0.95mm pitch and 2.9mm × 1.6mm footprint. Thermal resistance θJA = 115°C/W; maximum power dissipation at +70°C is 695mW.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; sinks 1.2mA @ 0.3V max VOL; drives µP reset directly |
| 2 | GND | Analog/digital ground reference for all internal comparators and logic; must be low-impedance connection |
| 3 | MR | Debounced manual-reset input; TTL/CMOS-compatible; pulls reset active when driven low; internal 32–100kΩ pullup |
| 4 | VCC2 | Secondary supply input and monitored rail; powers internal circuitry when VCC2 > VCC1; threshold = 1.58V |
| 5 | RSTIN | Adjustable reset comparator input; fixed 1.22V internal reference; accepts external divider to monitor third voltage (e.g., 3.3V, 5V) |
| 6 | VCC1 | Primary supply input and monitored rail; powers device when VCC1 > VCC2; threshold = 2.93V; resets RST when dropped |
Key Features
| Feature | Design Value |
|---|---|
| Precision triple-rail supervision | Simultaneously monitors VCC1 (2.93V), VCC2 (1.58V), and third voltage via RSTIN (1.22V ref) - eliminates need for multiple discrete supervisors |
| No external components required | Factory-trimmed thresholds and integrated MR debounce enable drop-in deployment in dual- or triple-rail systems without RC networks or calibration |
| Guaranteed reset validity down to 1.2V | RESET remains functional even if VCC1 or VCC2 drops to 1.2V - ensures fail-safe behavior during brownout conditions |
| Low quiescent current | 20µA typical supply current - extends battery life in portable equipment and reduces thermal load in dense PCB layouts |
| Power-supply transient immunity | Immune to transients <100ns at 0.5V overdrive - prevents false resets during switching noise or ESD events on VCC rails |
Applications
| Industrial PLC Controllers | Battery-Powered Data Loggers |
|---|---|
Use Scenario: A programmable logic controller uses separate 3.3V I/O, 2.5V FPGA core, and 1.8V memory rails, requiring coordinated reset sequencing and brownout detection. IC Role / Device Role / Timing Role: MAX6356SVUT+T monitors VCC1 = 3.3V (2.93V threshold), VCC2 = 1.8V (1.58V threshold), and RSTIN configured for 2.5V rail - asserting single RST signal only when any rail fails. Use Value: Eliminates timing skew between independent reset generators and guarantees deterministic startup across all subsystems. |
Use Scenario: A field-deployed environmental sensor node runs from coin-cell battery and includes ultra-low-power MCU, ADC, and RF transceiver - all powered from regulated 3.3V and 1.8V supplies. IC Role / Device Role / Timing Role: MAX6356SVUT+T supervises main 3.3V supply (VCC1), backup 1.8V LDO output (VCC2), and battery voltage via RSTIN divider - triggering reset before brownout-induced data corruption. Use Value: 20µA quiescent current preserves battery capacity; guaranteed reset down to 1.2V prevents silent failure during gradual discharge. |
| Medical Diagnostic Handhelds | Multivoltage Test Equipment |
Use Scenario: A portable ultrasound device integrates ARM Cortex-M7 (3.3V), analog front-end (2.5V), and flash memory (1.8V), demanding high-reliability power monitoring per IEC 62304 Class B. IC Role / Device Role / Timing Role: MAX6356SVUT+T provides single-point reset assertion when any of the three rails falls below spec - with RSTIN set to monitor 2.5V analog supply using 1.22V reference. Use Value: Factory-trimmed thresholds eliminate calibration overhead; push-pull RST avoids external pull-up, reducing BOM count and board area. |
Use Scenario: Benchtop test instrumentation uses isolated 5V digital, 3.3V interface, and 1.2V PLL supplies - each requiring independent but synchronized reset control. IC Role / Device Role / Timing Role: MAX6356SVUT+T monitors 3.3V (VCC1), 1.2V (VCC2), and 5V (via RSTIN divider) - generating one clean reset pulse valid across full operating range. Use Value: Immunity to sub-100ns VCC transients prevents spurious resets during relay switching or probe contact bounce. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6355SVUT+T | Open-drain RST output (vs. push-pull in MAX6356SVUT+T); identical VCC1/VCC2/RSTIN thresholds and pinout | Requires external pull-up resistor; suitable where level-shifting or wired-OR reset buses are needed | Select MAX6355SVUT+T only if system requires open-drain reset signaling - otherwise MAX6356SVUT+T offers lower component count and direct drive. |
| TPS3808G33DBVR | Dual-supply supervisor (no RSTIN); 3.3V fixed VDD threshold; 1% accuracy vs. MAX6356SVUT+T's 1.7% over temp; no third-rail monitoring | Lacks configurable third-voltage input - cannot replace MAX6356SVUT+T in true triple-rail designs | Use TPS3808G33DBVR only for dual-rail systems where RSTIN functionality is unnecessary; MAX6356SVUT+T remains essential for three-rail integrity. |
Compared with MAX6355SVUT+T, MAX6356SVUT+T delivers direct-drive reset capability without external components; compared with TPS3808G33DBVR, it uniquely supports three independent supply rails - making it irreplaceable in multivoltage systems requiring coordinated fault detection across primary, secondary, and auxiliary domains.
Availability
MAX6356SVUT+T is available at Aetrix Electronics and suitable for industrial PLC controllers, battery-powered data loggers, medical handheld diagnostics, and multivoltage test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6356SVUT+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 fabless semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, automotive, and communications markets.
The MAX6351–MAX6360 family was designed specifically for multivoltage embedded systems needing precise, low-power, and highly reliable power-supply supervision - with variants optimized for dual, triple, or watchdog-enhanced configurations.
FAQ
What is the function of Pin 5 (RSTIN) on the MAX6356SVUT+T?
Pin 5 (RSTIN) is the adjustable reset comparator input with a fixed internal reference of 1.22V. It allows monitoring of a third voltage rail by connecting an external resistive divider - for example, to supervise a 3.3V supply using R1=1.7MΩ and R2=1MΩ. The MAX6356SVUT+T asserts reset when the divided voltage at RSTIN falls below 1.22V, enabling true triple-rail supervision without additional ICs.
Does the MAX6356SVUT+T include a watchdog timer?
No, the MAX6356SVUT+T does not include a watchdog timer. Watchdog functionality is exclusive to the MAX6358/MAX6359/MAX6360 variants in the same family. The MAX6356SVUT+T is a triple-voltage supervisor only - providing precision monitoring of VCC1 (2.93V), VCC2 (1.58V), and a third rail via RSTIN, with no WDI pin or timeout logic.
What are the exact voltage thresholds for MAX6356SVUT+T?
The MAX6356SVUT+T has a VCC1 threshold of 2.93V (±0.05V at +25°C, 2.85V–3.00V over -40°C to +85°C) and a VCC2 threshold of 1.58V (±0.03V at +25°C, 1.53V–1.62V over temperature). These values are factory-trimmed and specified in the "Voltage Threshold Levels" table of the datasheet under suffix "SV".
Can MAX6356SVUT+T operate with VCC1 = 1.8V and VCC2 = 1.2V?
No - the MAX6356SVUT+T requires VCC1 ≥ 1.2V and VCC2 ≥ 1.2V to guarantee operation, but its factory-set thresholds (2.93V and 1.58V) are incompatible with 1.8V/1.2V rails. For such low-voltage systems, select a variant with matching suffix (e.g., "RW" = 2.63V/1.67V) or use RSTIN with external divider to adapt thresholds - the MAX6356SVUT+T itself is intended for 2.93V/1.58V nominal rails.
Is the reset output of MAX6356SVUT+T push-pull or open-drain?
The reset output of MAX6356SVUT+T is active-low push-pull, referenced to VCC1. This is confirmed in the Pin Description table (page 6) and Selector Guide (page 9), which explicitly state "*MAX6356: PUSH-PULL OUTPUT (VCC1)". It can sink 1.2mA at 0.3V max VOL and does not require an external pull-up resistor - unlike the open-drain MAX6355SVUT+T variant.
MAX6356SVUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- 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
MAX6356SVUT+T FAQ
1.How can I place an order for MAX6356SVUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6356SVUT+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 MAX6356SVUT+T reliable?
The price and inventory of MAX6356SVUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6356SVUT+T is usually 5 days.
3.What payment methods are accepted for MAX6356SVUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6356SVUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6356SVUT+T?
MAX6356SVUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6356SVUT+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 MAX6356SVUT+T?
For technical support, including MAX6356SVUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6356SVUT+T requirements.
6.How does Aetrix verify that MAX6356SVUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6356SVUT+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 MAX6356SVUT+T meets industry standards.
7.What is the process for return or replacement of MAX6356SVUT+T?
All MAX6356SVUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6356SVUT+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 MAX6356SVUT+T part is unused and in its original packaging.
Return procedure for MAX6356SVUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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