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Analog Devices Inc./Maxim Integrated MAX6353LSUK+
- Part No.:
- MAX6353LSUK+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6353LSUK+.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,839
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Product details
Overview
The MAX6353LSUK+ from Maxim Integrated is a dual-voltage microprocessor supervisory circuit with active-low push-pull reset output referenced to VCC1, precision factory-set thresholds of 4.63V (VTH1) and 2.93V (VTH2), 20µA supply current, and guaranteed RESET validity down to VCC1 = 1V or VCC2 = 1V - used in multivoltage embedded systems to ensure reliable power-on and brownout reset sequencing.
For engineers reviewing the MAX6353LSUK+ datasheet, MAX6353LSUK+ pinout, MAX6353LSUK+ application, or MAX6353LSUK+ equivalent, key selection criteria include dual-supply threshold accuracy, reset pulse width (100–280ms), manual-reset debouncing, SOT23-5 package compatibility, and absence of watchdog timer functionality in this variant.
Technical Context
The MAX6353LSUK+ monitors two independent supply rails (VCC1 and VCC2) and asserts its single active-low push-pull RST output when either falls below its respective factory-trimmed threshold (4.63V/2.93V). Reset remains valid as long as at least one supply exceeds +1.0V, enabling robust operation during asymmetric power sequencing.
It features a debounced TTL/CMOS-compatible manual-reset input (MR), 100ms minimum power-on-reset pulse width, and operates across –40°C to +85°C. Unlike MAX6358/MAX6359/MAX6360 variants, it lacks watchdog timer circuitry and third-voltage monitoring capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTH1 Threshold | 4.63V ±0.09V (factory-trimmed; ensures precise 4.63V supply monitoring with 20ppm/°C tempco) |
| VTH2 Threshold | 2.93V ±0.05V (factory-trimmed; enables accurate 2.93V rail supervision) |
| Supply Current | 20µA typical (enables ultra-low-power operation in battery-backed or energy-sensitive systems) |
| Reset Pulse Width | 100–280ms (guaranteed minimum 100ms ensures reliable µP initialization across temperature) |
| Operating Temp | –40°C to +85°C (fully specified for industrial-grade embedded applications) |
| Reset Output Type | Active-low push-pull referenced to VCC1 (drives directly into µP reset pin without external pull-up) |
| VCC Validity Range | RST valid while VCC1 ≥ 1.0V or VCC2 ≥ 1.0V (supports graceful reset assertion during deep brownout) |
Pinout & Package
MAX6353LSUK+ is housed in a 5-pin SOT23 package (U5-1 outline, land pattern 90-0174), RoHS-compliant with lead(Pb)-free finish (indicated by '+' suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; drives low during fault or MR assertion |
| 2 | GND | Ground reference for internal comparators and output stage |
| 3 | MR | Debounced manual-reset input; pulled high internally (~63.5kΩ); assert low ≥1µs to trigger reset |
| 4 | VCC2 | Second monitored supply rail (2.93V threshold); powers internal circuitry when > VCC1 |
| 5 | VCC1 | Primary monitored supply rail (4.63V threshold); powers internal circuitry when > VCC2 |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage precision monitoring | Simultaneously supervises two independent supplies (4.63V/2.93V) with ±0.09V/±0.05V accuracy over temperature |
| Push-pull RST output | Eliminates need for external pull-up resistor; compatible with standard µP reset inputs requiring active-low drive |
| Low quiescent current | 20µA typical draw enables use in always-on or battery-critical subsystems without significant leakage impact |
| Guaranteed reset validity | RST remains functional even if VCC1 drops to 1.0V or VCC2 drops to 1.0V - critical for fail-safe brownout detection |
| Manual reset debouncing | Internal filtering rejects <100ns glitches on MR pin, preventing spurious resets from switch bounce or noise |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
Use Scenario: Dual-rail power system (5V logic + 3.3V I/O) in programmable logic controller where undervoltage on either rail must halt CPU execution. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low reset to ARM Cortex-M7 core upon VCC1 (5V) drop below 4.63V or VCC2 (3.3V) drop below 2.93V. Use Value: Prevents corrupted register writes or memory access during partial power loss, ensuring deterministic recovery after brownout. | Use Scenario: Battery-powered ECG monitor with main Li-ion (4.2V→3.0V) and regulated 3.3V analog front-end supply. IC Role / Device Role / Timing Role: Resets microcontroller when main battery sags below 4.63V or analog rail drops below 2.93V, preserving sensor calibration integrity. Use Value: Enables safe shutdown before ADC reference collapse, avoiding false arrhythmia detection due to supply-induced offset drift. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: 12V-derived 5V MCU rail and isolated 3.3V CAN transceiver rail subject to load-dump and cold-crank transients. IC Role / Device Role / Timing Role: Dual-threshold supervisor triggering reset if 5V rail falls below 4.63V or 3.3V CAN rail drops below 2.93V during cranking. Use Value: Maintains reset assertion through 100ms+ transient events, preventing CAN bus lockup or EEPROM corruption during engine start. | Use Scenario: Dual-supply meter SoC with 3.3V digital core and 2.5V metrology ADC powered from separate LDOs. IC Role / Device Role / Timing Role: Asserts reset when digital supply falls below 4.63V (indicating upstream regulator failure) or metrology rail drops below 2.93V (ADC reference instability). Use Value: Guarantees meter firmware halts before inaccurate kWh calculation occurs, meeting IEC 62053-21 accuracy compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6353LTUK+ | VTH1 = 4.38V / VTH2 = 3.08V; identical pinout, package, and timing specs | Better suited for 4.3V nominal logic rails with tighter 3.08V I/O margin | Select when primary supply is 4.3V instead of 4.63V; no PCB changes required |
| TPS3808G33DBVR | Single-supply (3.3V only), open-drain RST, no VCC2 monitoring, 300ms min reset timeout | Lacks dual-rail capability; requires external voltage divider for second rail monitoring | Use only if monitoring one rail; not a functional substitute for dual-threshold requirement |
Compared with MAX6353LTUK+, the MAX6353LSUK+ provides higher VTH1 (4.63V vs. 4.38V) for stricter 5V rail supervision, while TPS3808G33DBVR cannot replace dual-voltage monitoring without added discrete components and compromises on reset timing control.
Availability
MAX6353LSUK+ is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, automotive body control modules, and smart energy meters requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6353LSUK+ 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, and communications applications.
The MAX6351–MAX6360 family delivers dual- and triple-voltage µP supervisors optimized for multirail embedded systems needing coordinated reset assertion across independent power domains.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6353LSUK+?
The MAX6353LSUK+ has factory-trimmed reset thresholds of 4.63V (VTH1) for VCC1 and 2.93V (VTH2) for VCC2, with tolerances of ±0.09V and ±0.05V respectively over –40°C to +85°C. These values are confirmed in the Voltage-Threshold Levels table and Electrical Characteristics section of the official datasheet. The 'LS' suffix explicitly denotes this 4.63V/2.93V combination.
Does the MAX6353LSUK+ include a watchdog timer function?
No, the MAX6353LSUK+ does not include a watchdog timer. Watchdog functionality is exclusive to MAX6358/MAX6359/MAX6360 variants per the Selector Guide and Pin Description tables. The MAX6353LSUK+ provides only dual-voltage monitoring, manual reset, and push-pull reset output - verified by absence of WDI pin and omission from watchdog-related electrical characteristics.
What is the package type and pin count of the MAX6353LSUK+?
The MAX6353LSUK+ uses a 5-pin SOT23 package (package code U5-1, outline 21-0057, land pattern 90-0174). This matches the ordering information table showing MAX6353__UK-T (and +T) as 5-pin SOT23, and is visually confirmed in the Pin Configurations diagram labeled "MAX6352/MAX6353/MAX6354 5 SOT23".
Can the MAX6353LSUK+ operate with supply voltages below 1.2V?
The MAX6353LSUK+ guarantees RESET output validity down to VCC1 = 1.0V or VCC2 = 1.0V, but its operational supply range is specified as VCC1/VCC2 = +1.2V to +5.5V over –40°C to +85°C per the Absolute Maximum Ratings and Electrical Characteristics tables. Operation below 1.2V is outside guaranteed specifications and may result in undefined comparator behavior or incomplete internal biasing.
Is the reset output of the MAX6353LSUK+ push-pull or open-drain?
The MAX6353LSUK+ features an active-low push-pull reset output (RST pin), referenced to VCC1. This is explicitly stated in the General Description ("MAX6353… offer an active-low, push-pull reset output referenced to VCC1") and confirmed in the Pin Description table where RST is defined as "push-pull with respect to VCC1 for the MAX6353/MAX6356/MAX6359".
MAX6353LSUK+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 2.93V, 4.63V
- 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-23-5
MAX6353LSUK+ FAQ
1.How can I place an order for MAX6353LSUK+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6353LSUK+ 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 MAX6353LSUK+ reliable?
The price and inventory of MAX6353LSUK+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6353LSUK+ is usually 5 days.
3.What payment methods are accepted for MAX6353LSUK+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6353LSUK+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6353LSUK+?
MAX6353LSUK+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6353LSUK+ 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 MAX6353LSUK+?
For technical support, including MAX6353LSUK+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6353LSUK+ requirements.
6.How does Aetrix verify that MAX6353LSUK+ is sourced from the original manufacturer or authorized distributors?
All MAX6353LSUK+ 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 MAX6353LSUK+ meets industry standards.
7.What is the process for return or replacement of MAX6353LSUK+?
All MAX6353LSUK+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6353LSUK+, 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 MAX6353LSUK+ part is unused and in its original packaging.
Return procedure for MAX6353LSUK+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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