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Analog Devices Inc./Maxim Integrated MAX6355SYUT-T
- Part No.:
- MAX6355SYUT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6355SYUT-T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
The MAX6355SYUT-T from Maxim Integrated is a triple-voltage microprocessor supervisory circuit with open-drain reset output, monitoring VCC1 (2.93V threshold), VCC2 (2.19V threshold), and a third voltage via RSTIN (1.22V fixed threshold). It features 20µA supply current, 100ms min reset pulse width, and operates over -40°C to +85°C in a 6-pin SOT23 package. Used in multivoltage embedded systems requiring reliable power-on and undervoltage detection.
For engineers reviewing the MAX6355SYUT-T datasheet, MAX6355SYUT-T pinout, MAX6355SYUT-T application, or MAX6355SYUT-T equivalent, key selection factors include its triple-supply monitoring capability, open-drain RST output compatible with mixed-voltage logic, RSTIN input for custom third-voltage thresholds, guaranteed RESET validity down to VCC1 = 1V or VCC2 = 1V, and absence of watchdog timer functionality.
Technical Context
The MAX6355SYUT-T implements dual independent voltage comparators for VCC1 and VCC2, plus a dedicated 1.22V reference comparator for the RSTIN input - enabling precise monitoring of three distinct supply rails. Its reset generator asserts an active-low open-drain RST signal whenever any monitored voltage falls below its factory-trimmed threshold.
Unlike watchdog-equipped variants (MAX6358–MAX6360), the MAX6355SYUT-T omits watchdog circuitry and uses no internal timing elements beyond reset timeout. Its manual-reset input (MR) is debounced and TTL/CMOS-compatible, with glitch rejection of 100ns and MR-to-RST delay under 0.1µs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.93V ±0.05V at +25°C; stable over -40°C to +85°C with 20ppm/°C tempco - ensures accurate reset assertion for 2.93V nominal supplies |
| VCC2 Threshold | 2.19V ±0.03V at +25°C; factory-trimmed for precision - enables reliable supervision of 2.2V-class auxiliary rails |
| RSTIN Threshold | 1.22V ±0.03V at +25°C; fixed internal reference - allows external resistive divider to monitor voltages up to 5.5V |
| Supply Current | 20µA typical at VCC1=5.5V/VCC2=3.6V - supports ultra-low-power battery-backed or energy-constrained systems |
| Reset Pulse Width | 100ms minimum - meets JEDEC JESD8-12B requirements for robust processor initialization |
| Operating Temp | -40°C to +85°C - qualified for industrial-grade embedded applications without derating |
| RESET Validity | Guaranteed as long as VCC1 ≥ 1V or VCC2 ≥ 1V - ensures fail-safe reset assertion during brownout conditions |
Pinout & Package
Package: 6-pin SOT23 (U6-1), surface-mount, RoHS-compliant, 1.6mm × 2.9mm footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST (open-drain) | Active-low reset output; requires external pullup; sinks ≥1.2mA at VCC ≥2.7V - interfaces directly with 1.8V–5V logic families |
| 2 | GND | Ground reference for all internal comparators and logic - must be low-impedance connection to system ground plane |
| 3 | MR | Debounced manual-reset input; active-low; internally pulled up ~63.5kΩ - eliminates need for external pullup resistor |
| 4 | VCC2 | Secondary supply input and monitor rail; powers internal circuitry when VCC2 > VCC1 - enables dual-rail priority supervision |
| 5 | RSTIN | Third-voltage monitor input; referenced to VCC1; threshold = 1.22V - used with external resistor divider to supervise arbitrary supply (e.g., 3.3V, 5V, 12V) |
| 6 | VCC1 | Primary supply input and monitor rail; powers internal circuitry when VCC1 > VCC2 - defines main operating voltage domain |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage monitoring | Simultaneously supervises VCC1 (2.93V), VCC2 (2.19V), and third voltage via RSTIN (1.22V ref) - eliminates need for multiple discrete supervisors in multirail systems |
| Open-drain RST output | Compatible with mixed-voltage I/O domains and wired-OR reset buses - simplifies integration into legacy or heterogeneous logic architectures |
| No external components required | Internal MR pullup (~63.5kΩ) and precision voltage references eliminate external resistors/capacitors - reduces BOM count and PCB area |
| Power-transient immunity | Rejects VCC transients <100ns at 100mV overdrive - prevents false resets during switching noise or load-dump events |
| Guaranteed operation down to 1V | RESET remains valid while either VCC1 ≥1V or VCC2 ≥1V - ensures deterministic behavior during deep brownout or backup-battery switchover |
Applications
| Industrial PLC Power Sequencing | Medical Sensor Node Supervision |
|---|---|
Use Scenario: A programmable logic controller monitors 3.3V I/O, 2.2V FPGA core, and 1.2V ADC reference rails during cold start and brownout. IC Role / Device Role / Timing Role: MAX6355SYUT-T asserts RST until all three rails stabilize above their thresholds, then holds reset for ≥100ms before release. Use Value: Prevents FPGA configuration corruption and ADC data errors by enforcing strict power-rail sequencing and hold time. | Use Scenario: A portable ECG sensor uses coin-cell backup and switches between USB (5V) and battery (3.0V) power, requiring supervision of both main and backup rails plus analog front-end bias. IC Role / Device Role / Timing Role: MAX6355SYUT-T monitors VCC1 (3.0V battery), VCC2 (2.19V LDO output), and RSTIN (1.22V reference via divider off 5V USB) - ensuring clean reset on any source transition. Use Value: Guarantees clinical-grade data integrity by eliminating spurious resets during power-source handover or low-battery sag. |
| Automotive Body Control Module | Industrial IoT Gateway |
Use Scenario: A BCM supervises 5V microcontroller supply, 3.3V CAN transceiver rail, and 1.8V sensor interface voltage across wide temperature (-40°C to +85°C). IC Role / Device Role / Timing Role: MAX6355SYUT-T provides single-chip triple-rail monitoring with automotive-grade temp range and transient immunity - replacing discrete solutions. Use Value: Reduces component count and improves field reliability by eliminating mismatched threshold drift between separate supervisors. | Use Scenario: An edge gateway with dual-core SoC requires coordinated reset of ARM core (1.1V), DDR memory (1.2V), and Wi-Fi module (3.3V) during thermal throttling or power cycling. IC Role / Device Role / Timing Role: MAX6355SYUT-T monitors VCC1 (3.3V), VCC2 (2.19V), and RSTIN (1.22V reference tied to DDR supply) - asserting unified reset on any rail fault. Use Value: Enables deterministic recovery from partial power failures without software intervention or external coordination logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6356SYUT-T | Push-pull RST output referenced to VCC1; same thresholds and RSTIN capability | Requires VCC1-referenced reset bus; not compatible with open-drain wired-OR topologies | Select when driving CMOS inputs directly without pullup and when VCC1 is stable during reset assertion |
| TPS3808G33DBVR | Dual-voltage supervisor only (no RSTIN); 3.3V/1.8V thresholds; 1.8µA quiescent current | Lacks third-voltage monitoring; lower supply current but no RSTIN flexibility | Select for dual-rail-only systems prioritizing ultra-low power over third-rail supervision |
Compared with MAX6356SYUT-T (push-pull) and TPS3808G33DBVR (dual-rail only), the MAX6355SYUT-T uniquely delivers open-drain reset compatibility and full triple-supply supervision in one industrial-grade package - making it optimal for systems requiring flexible reset bus topology and extended voltage monitoring scope.
Availability
MAX6355SYUT-T is available at Aetrix Electronics and suitable for industrial PLCs, medical sensor nodes, automotive body control modules, and industrial IoT gateways requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6355SYUT-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 high-performance analog and mixed-signal ICs for industrial, computing, communications, and consumer applications.
The MAX6351–MAX6360 family delivers precision multivoltage supervision for embedded systems where reliability, low power, and small size are critical - targeting applications with complex power architectures and stringent reset timing requirements.
FAQ
What is the function of the RSTIN pin on the MAX6355SYUT-T?
The RSTIN pin on the MAX6355SYUT-T is a dedicated third-voltage monitor input with a fixed 1.22V threshold. It is powered from VCC1 and accepts an external resistive divider to supervise voltages higher than 1.22V - for example, using R1=200kΩ and R2=20kΩ to monitor a 13.2V rail. The MAX6355SYUT-T asserts reset if the divided voltage at RSTIN falls below 1.22V, enabling flexible supervision of nonstandard supply rails beyond VCC1 and VCC2.
Does the MAX6355SYUT-T include a watchdog timer?
No, the MAX6355SYUT-T does not include a watchdog timer. Watchdog functionality is exclusive to the MAX6358/MAX6359/MAX6360 variants in the same family. The MAX6355SYUT-T provides only voltage supervision (VCC1, VCC2, and RSTIN) and manual reset - making it suitable for systems where processor activity monitoring is handled externally or not required. This omission contributes to its 20µA typical supply current and simplified timing behavior.
What are the exact voltage thresholds for the MAX6355SYUT-T?
The MAX6355SYUT-T has a VCC1 threshold of 2.93V (±0.05V at +25°C) and a VCC2 threshold of 2.19V (±0.03V at +25°C), both factory-trimmed and guaranteed over -40°C to +85°C. These values correspond to the "SY" suffix per the Voltage Threshold Levels table. The RSTIN threshold is fixed at 1.22V (±0.03V), independent of temperature or supply variations - confirmed in the Electrical Characteristics section of the MAX6351–MAX6360 datasheet.
Can the MAX6355SYUT-T operate with VCC1 and VCC2 below 2.0V?
Yes, the MAX6355SYUT-T guarantees operation with VCC1 or VCC2 as low as 1.2V over the full -40°C to +85°C range, and RESET remains valid down to 1.0V on either supply. However, the specified thresholds (2.93V and 2.19V) apply only when the respective supply is within its operational range. Below 1.2V, the device may not assert reset reliably - so the MAX6355SYUT-T supports brownout detection down to 1.0V but requires ≥1.2V for full specification compliance.
Is the MAX6355SYUT-T pin-compatible with other devices in the MAX6351–MAX6360 family?
The MAX6355SYUT-T shares the same 6-pin SOT23 (U6-1) package and pinout as MAX6356/MAX6357/MAX6358/MAX6359/MAX6360, but pin functions differ: Pin 1 is open-drain RST (not push-pull), and Pin 5 is RSTIN (not WDI or RST2). Therefore, it is not a drop-in replacement for those variants - swapping requires schematic and layout review to confirm RST drive strength, RSTIN usage, and absence of watchdog signals. Always verify against the specific variant's Pin Description table.
MAX6355SYUT-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:
- 2.19V, 2.93V, Adj
- Output:
- Open Drain or Open Collector
- 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
MAX6355SYUT-T FAQ
1.How can I place an order for MAX6355SYUT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6355SYUT-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 MAX6355SYUT-T reliable?
The price and inventory of MAX6355SYUT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6355SYUT-T is usually 5 days.
3.What payment methods are accepted for MAX6355SYUT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6355SYUT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6355SYUT-T?
MAX6355SYUT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6355SYUT-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 MAX6355SYUT-T?
For technical support, including MAX6355SYUT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6355SYUT-T requirements.
6.How does Aetrix verify that MAX6355SYUT-T is sourced from the original manufacturer or authorized distributors?
All MAX6355SYUT-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 MAX6355SYUT-T meets industry standards.
7.What is the process for return or replacement of MAX6355SYUT-T?
All MAX6355SYUT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6355SYUT-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 MAX6355SYUT-T part is unused and in its original packaging.
Return procedure for MAX6355SYUT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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