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Analog Devices Inc./Maxim Integrated MAX6355SYUT
- Part No.:
- MAX6355SYUT
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6355SYUT.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,837
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Product details
Overview
MAX6355SYUT 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 comparator input). It operates from -40°C to +85°C in a 6-pin SOT23 package and supports systems requiring independent validation of three power rails-e.g., FPGA core I/O banks with split supplies and auxiliary bias rails.
For engineers reviewing the MAX6355SYUT datasheet, MAX6355SYUT pinout, MAX6355SYUT application, or MAX6355SYUT equivalent, key selection criteria include its dual-supply monitoring capability, guaranteed RESET validity down to VCC1 = 1.0V or VCC2 = 1.0V, 20µA quiescent current, 100ms min reset pulse width, and compatibility with resistive divider-based third-voltage monitoring.
Technical Context
The MAX6355SYUT implements a triple-threshold supervision architecture: two factory-set precision voltage monitors (VTH1 = 2.93V ±0.05V, VTH2 = 2.19V ±0.06V) and one adjustable comparator input (RSTIN, 1.22V ±0.03V) for external voltage scaling. Reset assertion occurs if any monitored supply falls below its threshold or if RSTIN drops below 1.22V.
It features an active-low, open-drain RST output referenced to VCC1, debounced manual-reset (MR) input, and full operation over VCC1/VCC2 = 1.2V–5.5V. RESET remains valid as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V, enabling robust brownout detection during deep power-down sequences.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.93V ±0.05V at +25°C; ensures reliable reset assertion when primary 3.0V rail drops below system-safe level |
| VCC2 Threshold | 2.19V ±0.06V at +25°C; precisely monitors secondary 2.2V logic or analog supply without external components |
| RSTIN Threshold | 1.22V ±0.03V; enables accurate third-rail monitoring (e.g., 1.2V core) using external resistor divider |
| Supply Current | 20µA typical; minimizes standby power impact in battery-backed or energy-sensitive embedded systems |
| Reset Pulse Width | 100ms minimum; guarantees sufficient duration for full μP initialization and peripheral settling |
| Operating Temp | -40°C to +85°C; validated across industrial temperature range without derating or external compensation |
| RESET Validity | Guaranteed while VCC1 ≥ 1.0V or VCC2 ≥ 1.0V; supports clean reset assertion even during severe brownout conditions |
Pinout & Package
MAX6355SYUT is housed in a 6-pin SOT23 package (U6-1 outline, 90-0175 land pattern), with 0.95mm pitch, 2.9mm × 1.6mm footprint, and 1.1mm max height. Pin 1 is RST (open-drain), Pin 2 is GND, Pin 3 is MR, Pin 4 is VCC2, Pin 5 is RSTIN, and Pin 6 is VCC1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RST) | Active-low open-drain reset output | Requires external pull-up; compatible with mixed-voltage μP reset inputs and avoids contention on shared reset buses |
| 2 (GND) | Ground reference | Common return for all internal comparators and logic; must be low-impedance to ensure threshold accuracy |
| 3 (MR) | Debounced manual-reset input | Pull low to force reset; internally debounced to reject noise; valid over full VCC1 operating range |
| 4 (VCC2) | Secondary supply input & monitor | Provides power and voltage reference for second rail; monitored against 2.19V threshold |
| 5 (RSTIN) | Adjustable undervoltage-comparator input | Accepts externally scaled voltage; asserts reset when input falls below 1.22V; powered by VCC1 |
| 6 (VCC1) | Primary supply input & monitor | Provides main power and reference; monitored against 2.93V threshold; powers RSTIN circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage supervision | Simultaneously monitors two factory-set rails (2.93V/2.19V) plus third rail via RSTIN-eliminates need for discrete comparators or additional supervisors |
| Open-drain RST output | Enables wired-OR reset bus configuration and safe interfacing with bidirectional μP reset pins without contention |
| 1.22V precision RSTIN comparator | Fixed internal threshold allows accurate monitoring of sub-2V rails (e.g., 1.2V cores) using only two external resistors |
| 20µA supply current | Reduces system standby power by >90% versus discrete solutions-critical for portable and always-on IoT nodes |
| Guaranteed operation down to 1.0V | Ensures deterministic reset behavior during deep brownout, supporting fail-safe shutdown in industrial PLCs and automotive ECUs |
Applications
| FPGA Power-Rail Sequencing | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Monitoring separate 2.8V I/O bank, 2.2V transceiver, and 1.2V core supplies in Xilinx Artix-7-based control module. IC Role / Device Role / Timing Role: Triple-voltage supervisor asserting single open-drain RST signal only when all three rails are within spec; RSTIN used for core voltage with 10kΩ/10kΩ divider. Use Value: Eliminates need for three discrete supervisors and reduces BOM count by 67%, while guaranteeing synchronized reset across heterogeneous voltage domains. |
Use Scenario: Ensuring reliable startup and fault recovery in DIN-rail mounted programmable logic controller with isolated 24V field power, 5V logic, and 3.3V communication interface. IC Role / Device Role / Timing Role: Supervises 24V-to-5V converter output (VCC1 = 5V, TH = 4.63V variant not used; MAX6355SYUT monitors 5V rail as VCC1, 3.3V as VCC2, and isolated 24V sense via RSTIN divider). Use Value: Provides single-point reset coordination across safety-critical I/O, logic, and comms subsystems-enabling certified SIL2 compliance without custom timing circuits. |
| Battery-Powered Medical Sensor Node | Multivoltage Automotive Telematics Unit |
|
Use Scenario: Long-life wearable ECG sensor with Li-ion battery (3.0–4.2V), buck-converted 2.2V analog front-end, and 1.2V MCU core. IC Role / Device Role / Timing Role: VCC1 monitors battery voltage (2.93V threshold), VCC2 tracks 2.2V rail, RSTIN watches 1.2V core via 100kΩ/100kΩ divider; RST drives ultra-low-power BLE SoC reset pin. Use Value: Enables graceful shutdown before battery depletion-20µA quiescent current extends shelf life beyond 10 years in storage mode. |
Use Scenario: Infotainment head unit with 12V vehicle supply, 5V USB host, 3.3V display interface, and 1.1V GPU core-requiring coordinated reset under cold-crank (6.5V) and load-dump (18V) conditions. IC Role / Device Role / Timing Role: VCC1 monitors post-regulator 5V rail, VCC2 tracks 3.3V display supply, RSTIN observes GPU core via precision divider; RESET asserted only when all three fall out-of-spec. Use Value: Prevents partial initialization failures during voltage transients-guaranteeing deterministic boot after engine start without firmware intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6356SYUT | Push-pull RST output referenced to VCC1; no external pull-up required | Better suited for direct drive of CMOS reset inputs; incompatible with wired-OR buses | Select when driving single-load reset pins and minimizing external components |
| TPS3808G33DBVR | Dual-voltage supervisor only (no RSTIN); 3.3V fixed VDD threshold; 1.5% accuracy vs. MAX6355's 1.7% | Lacks third-rail monitoring capability; requires separate solution for core voltage supervision | Choose only if third-rail monitoring is unnecessary and higher threshold accuracy is prioritized |
Compared with MAX6355SYUT, MAX6356SYUT offers simplified interface but loses bus-sharing flexibility, while TPS3808G33DBVR reduces component count for dual-rail systems but cannot replace the RSTIN-based third-voltage monitoring function-making MAX6355SYUT uniquely suitable for true triple-supply integrity assurance.
Availability
MAX6355SYUT is available at Aetrix Electronics and suitable for FPGA power sequencing, industrial PLC I/O modules, battery-powered medical sensors, and multivoltage automotive telematics units requiring stable component supply and long-term lifecycle support.
Supply support for MAX6355SYUT 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, computing, and consumer applications.
The MAX6351–MAX6360 family delivers precision multirail supervision for complex embedded systems-designed specifically to replace discrete voltage-monitoring solutions in space-constrained, reliability-critical applications.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6355SYUT?
The MAX6355SYUT has a factory-set VCC1 threshold of 2.93V, with tolerance of ±0.05V at +25°C and ±0.08V over the full -40°C to +85°C operating range. This value is confirmed in the Voltage Threshold Levels table and Electrical Characteristics section of the MAX6351–MAX6360 datasheet, where "SY" suffix maps to 2.93V for VCC1.
Does the MAX6355SYUT support monitoring a third voltage, and how is it implemented?
Yes, the MAX6355SYUT supports third-voltage monitoring via its RSTIN pin, which features a precision 1.22V ±0.03V internal comparator. To monitor voltages above 1.22V-such as a 1.2V core or 3.3V rail-a resistive divider scales the target voltage down to the RSTIN threshold. The MAX6355SYUT datasheet provides the exact formula: VEXT = 1.22V × (R1 + R2)/R2.
What type of reset output does the MAX6355SYUT provide, and what are its electrical characteristics?
The MAX6355SYUT provides an active-low open-drain RST output. Its VOL is guaranteed ≤0.3V at ISINK = 50µA when VCC1 ≥ 1.2V and TA = -40°C to +85°C. It requires an external pull-up resistor and is designed for wired-OR configurations, making it compatible with multi-source reset buses and bidirectional μP reset pins.
Can the MAX6355SYUT operate reliably when one supply drops below 1.0V?
No-the MAX6355SYUT guarantees RESET output validity only while at least one supply (VCC1 or VCC2) remains ≥1.0V. If both VCC1 and VCC2 fall below 1.0V, the internal circuitry cannot maintain defined logic states. However, the device continues asserting RESET until both supplies drop below this 1.0V floor, ensuring fail-safe behavior during progressive brownout.
What is the package type and pin configuration of the MAX6355SYUT?
The MAX6355SYUT uses a 6-pin SOT23 package (U6-1 outline, land pattern 90-0175). Pin 1 is RST (open-drain), Pin 2 is GND, Pin 3 is MR, Pin 4 is VCC2, Pin 5 is RSTIN, and Pin 6 is VCC1. This configuration is explicitly shown in the "Pin Configurations" section of the MAX6351–MAX6360 datasheet and verified in the "Pin Description" table.
MAX6355SYUT 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 FAQ
1.How can I place an order for MAX6355SYUT through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6355SYUT 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 reliable?
The price and inventory of MAX6355SYUT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6355SYUT is usually 5 days.
3.What payment methods are accepted for MAX6355SYUT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6355SYUT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6355SYUT?
MAX6355SYUT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6355SYUT 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?
For technical support, including MAX6355SYUT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6355SYUT requirements.
6.How does Aetrix verify that MAX6355SYUT is sourced from the original manufacturer or authorized distributors?
All MAX6355SYUT 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 meets industry standards.
7.What is the process for return or replacement of MAX6355SYUT?
All MAX6355SYUT units undergo pre-shipment inspection (PSI). If there is an issue with MAX6355SYUT, 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 part is unused and in its original packaging.
Return procedure for MAX6355SYUT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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