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Analog Devices Inc./Maxim Integrated MAX6355TYUT
- Part No.:
- MAX6355TYUT
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6355TYUT.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,067
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Product details
Overview
MAX6355TYUT from Maxim Integrated is a triple-voltage microprocessor supervisory circuit with open-drain active-low reset output, 3.08V VCC1 threshold, 2.19V VCC2 threshold, and adjustable third-voltage monitoring via RSTIN (1.22V internal reference). It operates from -40°C to +85°C in a 6-pin SOT23 package and supports systems requiring reliable power-on reset and undervoltage detection across three rails - e.g., FPGA-based industrial controllers with separate core, I/O, and auxiliary supply domains.
For engineers reviewing the MAX6355TYUT datasheet, MAX6355TYUT pinout, MAX6355TYUT application, or MAX6355TYUT equivalent, key selection criteria include its dual-supply monitoring capability, guaranteed RESET validity down to VCC1 = 1V or VCC2 = 1V, 100ms minimum reset pulse width, 20µA quiescent current, and compatibility with third-voltage monitoring using external resistive dividers.
Technical Context
The MAX6355TYUT integrates two precision voltage comparators for independent VCC1 and VCC2 monitoring, plus a dedicated RSTIN input with 1.22V ±3mV internal reference for third-rail supervision. Its reset generator asserts an open-drain RST output when any monitored supply falls below its factory-set threshold or when the manual-reset (MR) input is pulled low.
Unlike watchdog-equipped variants (e.g., MAX6358–MAX6360), MAX6355TYUT omits watchdog functionality but adds RSTIN - enabling flexible third-voltage monitoring without external comparators. The device guarantees valid reset assertion as long as either VCC1 ≥ 1.2V or VCC2 ≥ 1.2V over the full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 3.08V ±0.05V at +25°C; ensures reliable reset assertion when primary supply drops below nominal 3.3V rail |
| VCC2 Threshold | 2.19V ±0.03V at +25°C; enables monitoring of secondary 2.2V or 2.5V I/O supply |
| RSTIN Reference | 1.22V ±0.03V; allows precise third-voltage monitoring (e.g., 1.2V core rail) via external resistor divider |
| Reset Pulse Width | 100ms minimum; meets μP reset timing requirements for stable initialization |
| Supply Current | 20µA typical at VCC1=5.5V/VCC2=3.6V; enables battery-backed or ultra-low-power applications |
| Operating Temp | -40°C to +85°C; qualified for industrial embedded environments without derating |
| RESET Validity | Guaranteed while VCC1 ≥ 1.2V or VCC2 ≥ 1.2V; supports brownout detection down to near-1V supplies |
Pinout & Package
MAX6355TYUT is housed in a 6-pin SOT23 package (U6-1 outline, land pattern 90-0175), with 0.95mm pitch and 2.9mm × 1.6mm footprint. Pin 1 is RST (open-drain active-low reset), Pin 2 is GND, Pin 3 is MR (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 | Open-drain active-low reset output | Requires external pull-up; compatible with mixed-voltage logic interfaces and bidirectional μP reset pins |
| 2 - GND | Ground reference | Common return for all internal comparators and logic; must be low-impedance for noise immunity |
| 3 - MR | Debounced manual-reset input | Pull low to force reset; internally debounced to reject <100ns glitches; valid over full VCC range |
| 4 - VCC2 | Secondary supply input & monitor rail | Monitored against 2.19V threshold; powers internal circuitry when VCC2 > VCC1 |
| 5 - RSTIN | Adjustable third-voltage comparator input | Referenced to 1.22V internal threshold; accepts external divider for monitoring voltages >1.22V (e.g., 3.3V, 5V) |
| 6 - VCC1 | Primary supply input & monitor rail | Monitored against 3.08V threshold; powers internal circuitry when VCC1 > VCC2 |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage monitoring | Simultaneous supervision of VCC1 (3.08V), VCC2 (2.19V), and third rail via RSTIN - eliminates need for discrete comparators in multirail systems |
| Open-drain RST output | Enables wired-OR reset bus configuration and safe interfacing with bidirectional μP reset pins using series resistor |
| 1.22V precision RSTIN reference | ±3mV tolerance enables accurate third-rail monitoring (e.g., 1.2V core) without trimming or calibration |
| Low 20µA supply current | Reduces standby power in battery-powered instrumentation and portable equipment without sacrificing reset accuracy |
| Guaranteed operation down to 1.2V | Ensures valid reset assertion during deep brownout conditions where VCC1 or VCC2 dips near 1V |
Applications
| Industrial PLC Controller | FPGA Configuration System |
|---|---|
Use Scenario: Monitoring 3.3V I/O bank, 2.2V transceiver supply, and 1.2V FPGA core voltage during cold start and brownout events. IC Role / Device Role / Timing Role: Triple-rail supervisor asserting synchronized reset to FPGA and peripheral ICs until all supplies stabilize above thresholds. Use Value: Prevents partial configuration or metastability by ensuring all voltage domains meet specification before releasing reset. | Use Scenario: Ensuring reliable configuration of Xilinx Artix-7 FPGA with separate VCCINT (1.2V), VCCAUX (2.5V), and VCCO (3.3V) rails. IC Role / Device Role / Timing Role: Supervises VCC1=3.3V (VCCO), VCC2=2.19V (approximating 2.5V with margin), and RSTIN for 1.2V core via divider. Use Value: Guarantees FPGA enters configuration mode only after all critical supplies are within tolerance - eliminating bitstream corruption. |
| Battery-Powered Data Logger | Medical Sensor Hub |
Use Scenario: Managing Li-ion battery discharge (3.0–4.2V), regulated 2.2V analog sensor supply, and 1.8V MCU core rail in portable diagnostics equipment. IC Role / Device Role / Timing Role: Monitors main battery (VCC1), analog supply (VCC2), and MCU core (RSTIN) to trigger graceful shutdown before brownout. Use Value: 20µA quiescent current extends battery life; 100ms reset pulse ensures clean MCU restart during intermittent power recovery. | Use Scenario: Supervising isolated 3.3V digital domain, 2.2V analog front-end, and 1.2V ADC reference supply in ECG signal acquisition module. IC Role / Device Role / Timing Role: Provides fault-tolerant reset coordination across safety-critical analog/digital boundaries using single-chip triple monitoring. Use Value: Eliminates risk of analog saturation or digital lockup by asserting reset if any rail deviates - meeting IEC 60601-1 reliability requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6356TYUT | Push-pull RST output referenced to VCC1; no RSTIN hysteresis spec; identical thresholds and package | Requires pull-up not needed; less suitable for wired-OR buses or bidirectional μP interfaces | Select MAX6356TYUT when driving CMOS inputs directly and board space permits minor layout change |
| TPS3808G33DBVR | Dual-supply monitor only (no RSTIN); 3.3V fixed VDD threshold; 1.2V enable input instead of adjustable monitor | Lacks third-rail flexibility; requires external circuitry to supervise >2 rails | Choose TPS3808G33DBVR only if third-voltage monitoring is handled separately and cost is primary constraint |
Compared with MAX6355TYUT, MAX6356TYUT offers push-pull drive but loses RSTIN flexibility, while TPS3808G33DBVR reduces integration by omitting the third-voltage path - making MAX6355TYUT uniquely suited for compact, self-contained triple-rail supervision without added components.
Availability
MAX6355TYUT is available at Aetrix Electronics and suitable for industrial PLC controllers, FPGA configuration systems, battery-powered data loggers, and medical sensor hubs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6355TYUT 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, communications, and computing applications.
The MAX6351–MAX6360 family delivers precision multivoltage supervision with minimal external components - targeting space-constrained, reliability-critical embedded systems needing deterministic reset behavior across multiple power domains.
FAQ
What is the exact VCC1 and VCC2 threshold voltage for MAX6355TYUT?
The MAX6355TYUT has a VCC1 threshold of 3.08V (±0.05V at +25°C) and a VCC2 threshold of 2.19V (±0.03V at +25°C), as defined by the "TY" suffix per Maxim's Voltage Threshold Levels table. These values are factory-trimmed and guaranteed over -40°C to +85°C.
Does MAX6355TYUT include a watchdog timer function?
No, MAX6355TYUT does not include a watchdog timer. Watchdog functionality is exclusive to MAX6358/MAX6359/MAX6360 variants. MAX6355TYUT instead provides the RSTIN input for third-voltage monitoring - a feature absent in watchdog-equipped versions.
How is the third-voltage monitoring implemented on MAX6355TYUT?
MAX6355TYUT implements third-voltage monitoring via the RSTIN pin, which connects to an internal 1.22V ±0.03V precision reference comparator. To monitor voltages above 1.22V (e.g., 3.3V or 5V), an external resistive divider scales the target voltage to match the 1.22V threshold at RSTIN.
What is the output type of the reset signal on MAX6355TYUT?
The MAX6355TYUT features an open-drain active-low RST output (Pin 1), requiring an external pull-up resistor. This design enables wired-OR reset busing, level translation across voltage domains, and safe interfacing with bidirectional μP reset pins - unlike push-pull variants such as MAX6356TYUT.
Can MAX6355TYUT operate with supply voltages below 1.8V?
Yes, MAX6355TYUT guarantees functional reset assertion as long as either VCC1 ≥ 1.2V or VCC2 ≥ 1.2V, per Absolute Maximum Ratings and Electrical Characteristics. Its 3.08V/2.19V thresholds are designed to supervise standard low-voltage rails while maintaining validity deep into brownout conditions.
MAX6355TYUT 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, 3.08V, 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
MAX6355TYUT FAQ
1.How can I place an order for MAX6355TYUT through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6355TYUT 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 MAX6355TYUT reliable?
The price and inventory of MAX6355TYUT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6355TYUT is usually 5 days.
3.What payment methods are accepted for MAX6355TYUT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6355TYUT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6355TYUT?
MAX6355TYUT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6355TYUT 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 MAX6355TYUT?
For technical support, including MAX6355TYUT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6355TYUT requirements.
6.How does Aetrix verify that MAX6355TYUT is sourced from the original manufacturer or authorized distributors?
All MAX6355TYUT 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 MAX6355TYUT meets industry standards.
7.What is the process for return or replacement of MAX6355TYUT?
All MAX6355TYUT units undergo pre-shipment inspection (PSI). If there is an issue with MAX6355TYUT, 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 MAX6355TYUT part is unused and in its original packaging.
Return procedure for MAX6355TYUT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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