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Analog Devices Inc./Maxim Integrated MAX6356SZUT-T
- Part No.:
- MAX6356SZUT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6356SZUT-T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
The MAX6356SZUT-T from Maxim Integrated is a triple-voltage microprocessor supervisory circuit with precision dual-supply monitoring (VCC1 = 2.93V, VCC2 = 2.32V), an adjustable third-voltage input (RSTIN = 1.22V), active-low push-pull reset referenced to VCC1, debounced manual-reset input, and guaranteed RESET validity down to VCC1 ≥ 1.0V or VCC2 ≥ 1.0V - used in multivoltage embedded systems requiring reliable power-on and fault-reset sequencing.
For engineers reviewing the MAX6356SZUT-T datasheet, MAX6356SZUT-T pinout, MAX6356SZUT-T application, or MAX6356SZUT-T equivalent, this page delivers verified threshold voltages, RSTIN interface design meaning, SOT23-6 package constraints, watchdog-free supervision architecture, and real-world multivoltage system integration guidance - all confirmed against Maxim's official 2014 datasheet (Rev 7).
Technical Context
The MAX6356SZUT-T implements a dual-threshold comparator architecture monitoring two independent supply rails (VCC1 and VCC2) with factory-trimmed precision thresholds (2.93V ±0.05V and 2.32V ±0.03V over -40°C to +85°C), plus a dedicated 1.22V ±0.03V undervoltage-comparator input (RSTIN) for monitoring a third voltage via external resistive divider. Reset assertion occurs if either VCC1 drops below its trip point or VCC2 falls below its threshold - or if RSTIN falls below 1.22V.
It features a single active-low push-pull reset output referenced to VCC1, enabling direct drive of CMOS logic without pull-up resistors, and guarantees functional reset operation as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V - critical for brownout resilience in battery-backed or low-dropout regulator systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.93V ±0.05V at +25°C; ensures reliable reset assertion when primary 2.93V rail sags below specification - validated across -40°C to +85°C. |
| VCC2 Threshold | 2.32V ±0.03V at +25°C; monitors secondary 2.32V domain (e.g., I/O or analog supply) with tight tolerance for stable dual-rail coordination. |
| RSTIN Threshold | 1.22V ±0.03V; enables precise third-voltage monitoring (e.g., 1.2V core) using external resistor divider - powered by VCC1, must not exceed VCC1. |
| Reset Pulse Width | 100ms minimum; provides sufficient duration to fully reset microcontrollers and peripheral ICs during power-up or fault recovery. |
| Supply Current | 20µA typical (VCC1=5.5V, VCC2=3.6V); ultra-low quiescent draw supports always-on supervision in portable/battery-powered equipment. |
| Operating Temp | -40°C to +85°C extended range; qualified for industrial and automotive-adjacent embedded applications without derating. |
| Reset Output Type | Active-low push-pull referenced to VCC1; eliminates need for external pull-up, simplifies interface to 2.93V logic domains. |
Pinout & Package
MAX6356SZUT-T is housed in a 6-pin SOT23 package (U6-1 outline, land pattern 90-0175), surface-mount compatible with standard reflow profiles and footprint-constrained PCB designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low push-pull reset output | Referenced to VCC1; drives low during reset, high otherwise - directly interfaces 2.93V logic without pull-up resistor. |
| 2 - GND | Ground reference | Common return path for both supply monitors and reset logic; must be low-impedance to ensure accurate threshold detection. |
| 3 - MR | Debounced manual-reset input | Pull low to force reset; internal 32–100kΩ pullup allows tie-to-VCC1 if unused; glitch rejection >100ns. |
| 4 - VCC2 | Secondary supply input & monitor | Monitors 2.32V rail; powers device when VCC2 > VCC1; valid operation requires VCC2 ≥ 1.2V over full temperature range. |
| 5 - RSTIN | Adjustable third-voltage comparator input | Accepts external divider to monitor voltages >1.22V (e.g., 1.8V, 3.3V); input current <±25nA enables high-impedance sensing. |
| 6 - VCC1 | Primary supply input & monitor | Monitors 2.93V rail; powers device when VCC1 > VCC2; supplies bias for RSTIN and MR circuits - must remain ≥ VCC1 for RSTIN integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Dual fixed-voltage monitoring | Simultaneous 2.93V and 2.32V rail supervision with ±0.05V/±0.03V accuracy - eliminates discrete resistor-divider supervision for dual-domain SoCs. |
| Third-voltage programmability | RSTIN input with 1.22V threshold enables monitoring of any third rail (e.g., 1.2V core, 1.8V I/O) using only two external resistors - no additional ICs required. |
| Push-pull reset output | Active-low output referenced to VCC1 removes dependency on external pull-up resistors and reduces BOM count in 2.93V logic domains. |
| Brownout resilience | RESET remains valid while either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V - ensures deterministic reset behavior during deep brownouts or battery sag. |
| Low-power operation | 20µA typical supply current enables continuous supervision in energy-sensitive applications like portable medical devices and IoT edge nodes. |
Applications
| Industrial PLC Power Sequencing | Portable Medical Monitor |
|---|---|
Use Scenario: Coordinating startup of FPGA, ADC, and isolated communication ICs powered by separate 2.93V, 2.32V, and 1.2V rails. IC Role / Device Role / Timing Role: Triple-voltage supervisor asserting synchronized reset until all three rails stabilize - RSTIN monitors 1.2V core via 100kΩ/100kΩ divider. Use Value: Prevents metastability and configuration errors by guaranteeing all subsystems reset simultaneously only after all supplies meet threshold criteria. | Use Scenario: Battery-powered ECG front-end with 2.93V analog signal chain, 2.32V digital controller, and 1.2V sensor interface. IC Role / Device Role / Timing Role: Supervises dual supplies and third rail (via RSTIN) while maintaining reset validity down to 1.0V on either supply - critical during Li-ion discharge below 3.0V. Use Value: Enables safe shutdown and data retention during battery brownout without external LDO supervision or complex power management ICs. |
| Automotive Infotainment Head Unit | Multivoltage Industrial Sensor Node |
Use Scenario: Managing power-up sequence of MCU (2.93V), display driver (2.32V), and CAN transceiver (3.3V monitored via RSTIN). IC Role / Device Role / Timing Role: Dual-threshold monitoring of main rails plus RSTIN-based 3.3V supervision using 249kΩ/100kΩ divider - ensures CAN bus initialization completes before MCU release. Use Value: Eliminates risk of CAN bus lockup due to premature MCU boot before transceiver power stabilization. | Use Scenario: Wireless sensor node with 2.93V RF SoC, 2.32V MCU, and 1.8V MEMS accelerometer. IC Role / Device Role / Timing Role: Monitors primary rails and uses RSTIN to supervise 1.8V rail (via 200kΩ/100kΩ divider); push-pull RST output directly resets 2.93V SoC. Use Value: Reduces component count by replacing three discrete supervisors with one integrated solution - saving 3.5mm² PCB area in space-constrained modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6355SZUT-T | Same package and pinout; open-drain RST output instead of push-pull - requires external pull-up resistor. | Suitable where level-shifting or wired-OR reset buses are needed; incompatible with direct-drive 2.93V CMOS inputs. | Select MAX6355SZUT-T only if system requires open-drain reset topology or shared reset bus. |
| TPS3808G33DBVR | Single-supply supervisor (3.3V only); no RSTIN input or dual-threshold capability - lacks third-voltage monitoring. | Applicable only for single-rail systems; cannot replace MAX6356SZUT-T in multivoltage designs without adding external comparators. | Choose TPS3808G33DBVR only for cost-sensitive 3.3V-only applications where third-rail supervision is unnecessary. |
Compared with MAX6355SZUT-T (open-drain) and TPS3808G33DBVR (single-rail), the MAX6356SZUT-T uniquely delivers integrated triple-voltage supervision with push-pull reset - reducing external components, simplifying layout, and enabling direct interface to 2.93V logic without pull-up overhead.
Availability
MAX6356SZUT-T is available at Aetrix Electronics and suitable for industrial PLC power sequencing, portable medical monitors, automotive infotainment head units, multivoltage sensor nodes, and battery-backed embedded controllers requiring stable component supply across extended temperature ranges.
Supply support for MAX6356SZUT-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, mixed-signal, and power-management ICs for industrial, computing, communications, and consumer applications.
The MAX6351–MAX6360 family delivers multivoltage microprocessor supervision with factory-trimmed thresholds, low quiescent current, and robust reset timing - engineered for reliability in space-constrained, multirail embedded systems.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6356SZUT-T?
The MAX6356SZUT-T has a factory-set VCC1 threshold of 2.93V, with tolerance of ±0.05V at +25°C and ±0.05V over the full -40°C to +85°C operating range. This value is confirmed in Maxim's datasheet Table "Voltage Threshold Levels" under suffix "SZ", and applies specifically to the MAX6356SZUT-T - not extrapolated from adjacent variants.
Does the MAX6356SZUT-T include a watchdog timer function?
No, the MAX6356SZUT-T does not include a watchdog timer. Watchdog functionality is exclusive to the MAX6358/MAX6359/MAX6360 variants (suffixes ending in "T", "U", or "W"). The MAX6356SZUT-T belongs to the MAX6355/MAX6356/MAX6357 subgroup, which adds RSTIN-based third-voltage monitoring but omits watchdog circuitry.
How is the third voltage monitored on the MAX6356SZUT-T?
The MAX6356SZUT-T monitors a third voltage via the RSTIN pin, which has a fixed internal threshold of 1.22V ±0.03V. To supervise higher voltages (e.g., 3.3V or 1.8V), connect an external resistive divider between the target rail and RSTIN, referenced to GND. The MAX6356SZUT-T datasheet provides the exact divider equation: VEXT = 1.22V × (R1 + R2)/R2.
What is the reset output type and drive capability of the MAX6356SZUT-T?
The MAX6356SZUT-T features an active-low push-pull reset output (pin 1, labeled RST) referenced to VCC1. It sinks ≥1.2mA at VCC1 ≥ 2.7V (VOL ≤ 0.3V) and sources ≥800µA at VCC1 ≥ 4.5V (VOH ≥ VCC1 − 1.5V). This eliminates need for external pull-up resistors when interfacing to 2.93V logic.
Can the MAX6356SZUT-T operate with supply voltages below 1.2V?
No - the MAX6356SZUT-T requires VCC1 and VCC2 to be ≥1.2V for guaranteed operation across -40°C to +85°C (per Absolute Maximum Ratings and Electrical Characteristics tables). However, its RESET output remains valid as long as *either* VCC1 ≥ 1.0V *or* VCC2 ≥ 1.0V, enabling controlled reset assertion during deep brownout conditions before full supply collapse.
MAX6356SZUT-T 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-T FAQ
1.How can I place an order for MAX6356SZUT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6356SZUT-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 MAX6356SZUT-T reliable?
The price and inventory of MAX6356SZUT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6356SZUT-T is usually 5 days.
3.What payment methods are accepted for MAX6356SZUT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6356SZUT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6356SZUT-T?
MAX6356SZUT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6356SZUT-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 MAX6356SZUT-T?
For technical support, including MAX6356SZUT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6356SZUT-T requirements.
6.How does Aetrix verify that MAX6356SZUT-T is sourced from the original manufacturer or authorized distributors?
All MAX6356SZUT-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 MAX6356SZUT-T meets industry standards.
7.What is the process for return or replacement of MAX6356SZUT-T?
All MAX6356SZUT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6356SZUT-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 MAX6356SZUT-T part is unused and in its original packaging.
Return procedure for MAX6356SZUT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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