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Analog Devices Inc./Maxim Integrated MAX6352LSUK+T
- Part No.:
- MAX6352LSUK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6352LSUK+T.pdf
- Description:
- IC SUPERVISOR MPU SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,495
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Product details
Overview
MAX6352LSUK+T from Maxim Integrated is a dual-voltage microprocessor supervisory circuit with active-low open-drain reset output, factory-set VCC1 threshold of 4.38V and VCC2 threshold of 2.93V, 100ms minimum reset timeout, 20µA supply current, and operation over -40°C to +85°C - used in multivoltage embedded systems to ensure reliable power-on and brownout reset sequencing.
For engineers reviewing the MAX6352LSUK+T datasheet, MAX6352LSUK+T pinout, MAX6352LSUK+T application, or MAX6352LSUK+T equivalent, key selection considerations include its dual-supply monitoring capability, open-drain RST output referenced to either VCC rail, guaranteed RESET validity down to VCC = 1.0V, and compatibility with TTL/CMOS manual-reset inputs.
Technical Context
The MAX6352LSUK+T monitors two independent supply rails (VCC1 and VCC2) and asserts its single open-drain RST output whenever either falls below its precision factory-trimmed threshold (4.38V for VCC1, 2.93V for VCC2). 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), supports no external components for dual-rail supervision, and provides power-supply transient immunity up to 200µs at 100mV overdrive - all within a 5-pin SOT23 package rated for industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.38V ±0.08V (factory-trimmed; ensures precise 4.38V supply monitoring with 20ppm/°C tempco) |
| VCC2 Threshold | 2.93V ±0.05V (factory-trimmed; enables accurate 2.93V rail supervision independent of VCC1) |
| Reset Timeout | 100–280ms (guaranteed minimum 100ms pulse width ensures reliable µP initialization) |
| Supply Current | 20µA typical (ultra-low quiescent current extends battery life in portable equipment) |
| Operating Temp | -40°C to +85°C (fully specified industrial temperature range for harsh environments) |
| RESET Validity | Down to VCC1 ≥ 1.0V or VCC2 ≥ 1.0V (ensures reset integrity during deep brownout conditions) |
| Output Type | Active-low open-drain (supports wired-OR configuration and level-shifting across voltage domains) |
Pinout & Package
MAX6352LSUK+T is housed in a lead(Pb)-free 5-pin SOT23 package (package code U5-1), with 1.27mm pitch, 2.9mm × 1.6mm footprint, and thermal pad omitted. Pin 1 is RST (open-drain), Pin 2 is GND, Pin 3 is MR, Pin 4 is VCC2, and Pin 5 is VCC1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST (Pin 1) | Active-low open-drain reset output | Drives low during fault; requires external pullup; compatible with mixed-voltage logic interfaces |
| GND (Pin 2) | Ground reference | Common return path for both supply monitors and internal comparators |
| MR (Pin 3) | Debounced manual-reset input | Pull low to force reset; internally pulled up; accepts TTL/CMOS levels |
| VCC2 (Pin 4) | Secondary supply input & monitor | Power source and monitored rail; threshold = 2.93V; powers internal circuitry when > VCC1 |
| VCC1 (Pin 5) | Primary supply input & monitor | Power source and monitored rail; threshold = 4.38V; powers internal circuitry when > VCC2 |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage thresholds | Enables simultaneous monitoring of 4.38V and 2.93V rails without external resistors or calibration |
| Open-drain RST output | Allows shared reset bus across multiple voltage domains and simplifies interface with bidirectional µP reset pins |
| Guaranteed RESET down to 1.0V | Ensures deterministic reset assertion even during severe brownout on either supply rail |
| 20µA ultra-low supply current | Minimizes standby power draw in battery-powered applications such as portable instrumentation |
| 100ms min reset pulse width | Meets minimum reset timing requirements of most ARM Cortex-M and legacy 8-bit microcontrollers |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
Use Scenario: Monitoring 5V logic supply and 3.3V I/O supply in programmable logic controllers subject to field-level EMI and voltage sags. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting open-drain reset to halt CPU execution until both supplies stabilize above 4.38V and 2.93V respectively. Use Value: Prevents firmware corruption during brownout by guaranteeing ≥100ms reset hold time and validating reset state down to 1.0V on either rail. | Use Scenario: Power sequencing in handheld ECG devices powered by single-cell Li-ion batteries with buck-boost regulation to 4.38V and 2.93V rails. IC Role / Device Role / Timing Role: Supervises primary system rail and analog front-end rail; triggers reset if battery voltage drops below safe operating thresholds. Use Value: Enables reliable cold-start and graceful shutdown using only 20µA quiescent current, extending operational runtime between charges. |
| Multivoltage Industrial Sensors | Intelligent Power Meters |
Use Scenario: Dual-supply sensor nodes with isolated 4.38V digital core and 2.93V analog signal chain operating in wide-temperature substations. IC Role / Device Role / Timing Role: Provides rail-specific undervoltage detection and synchronized reset assertion to prevent metastability in ADC/DAC interfaces. Use Value: Eliminates need for discrete resistor dividers or separate supervisors, reducing BOM count and PCB area in space-constrained modules. | Use Scenario: Revenue-grade electricity meters requiring fail-safe reset behavior during grid voltage fluctuations and zero-crossing interruptions. IC Role / Device Role / Timing Role: Monitors auxiliary 4.38V metering ASIC supply and 2.93V RTC/communication rail to maintain timekeeping and secure data logging integrity. Use Value: Guarantees reset validity down to 1.0V on either rail, ensuring nonvolatile memory writes complete before power collapse. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6352LTUK+T | VCC1 threshold = 4.63V (vs. 4.38V); same VCC2 = 2.93V; identical pinout and timing | Suitable for systems with tighter 4.63V tolerance on main supply; not interchangeable without revalidation | Select when main rail nominal is 5.0V ±3% rather than 4.5V ±5% |
| TPS3808G18DBVR | Single-supply (1.8V threshold only); fixed 200ms reset timeout; 1.8V–6.0V VDD range; SOT23-5 | Lacks dual-rail monitoring; requires external circuitry for second rail; lower quiescent current (1.1µA) | Use only if monitoring one rail suffices and ultra-low IQ is critical |
Compared with MAX6352LTUK+T, the MAX6352LSUK+T offers tighter VCC1 threshold alignment for 4.5V nominal systems; compared with TPS3808G18DBVR, it delivers true dual-rail supervision without external components but consumes higher quiescent current.
Availability
MAX6352LSUK+T is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, multivoltage industrial sensors, intelligent power meters, and battery-powered instrumentation requiring stable component supply across extended temperature ranges.
Supply support for MAX6352LSUK+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, automotive, and communications markets, with emphasis on reliability and integration.
The MAX6351–MAX6360 family was developed specifically for multivoltage embedded systems needing precise, low-power, dual-rail supervision without external components - targeting applications where supply sequencing integrity is mission-critical.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6352LSUK+T?
The MAX6352LSUK+T has a factory-trimmed VCC1 threshold of 4.38V (±0.08V over temperature) and VCC2 threshold of 2.93V (±0.05V over temperature), as defined by the "LS" suffix per Maxim's Voltage Threshold Levels table. These values are guaranteed across the full -40°C to +85°C operating range and enable precise dual-rail monitoring without calibration.
Does the MAX6352LSUK+T support watchdog timer functionality?
No, the MAX6352LSUK+T does not include a watchdog timer. Watchdog capability is exclusive to the MAX6358/MAX6359/MAX6360 variants in the same family. The MAX6352LSUK+T provides only dual-voltage monitoring, manual reset input, and open-drain reset output - confirmed by its 5-pin SOT23 pinout and absence of WDI pin.
Can the MAX6352LSUK+T operate with supply voltages below 1.2V?
No - while the MAX6352LSUK+T guarantees valid RESET output down to VCC1 ≥ 1.0V or VCC2 ≥ 1.0V, its minimum specified supply voltage is 1.2V over the full -40°C to +85°C range (per Electrical Characteristics table). Operation below 1.2V is outside guaranteed specifications and may result in undefined comparator behavior or insufficient internal biasing.
Is the RST output of the MAX6352LSUK+T push-pull or open-drain?
The RST output of the MAX6352LSUK+T is open-drain, as confirmed by the Pin Description table (page 6), Selector Guide (page 9), and functional diagram (page 7) of the official datasheet. This allows flexible interfacing with multiple voltage domains via external pullup resistors and prevents contention with bidirectional µP reset pins.
What is the maximum allowable voltage on the MR pin of the MAX6352LSUK+T?
The MR pin voltage must not exceed VCC1, as explicitly stated in the Pin Description section: "VMR must not exceed VCC1." Absolute maximum rating for MR is -0.3V to (VCC1 + 0.3V), but sustained operation above VCC1 risks latch-up or damage. For safe TTL/CMOS compatibility, MR should be driven between 0.8V (VIL) and 2.3V (VIH) when VCC1 > VTH1(MAX), per Electrical Characteristics.
MAX6352LSUK+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 2.93V, 4.63V
- 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-23-5
MAX6352LSUK+T FAQ
1.How can I place an order for MAX6352LSUK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6352LSUK+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 MAX6352LSUK+T reliable?
The price and inventory of MAX6352LSUK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6352LSUK+T is usually 5 days.
3.What payment methods are accepted for MAX6352LSUK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6352LSUK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6352LSUK+T?
MAX6352LSUK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6352LSUK+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 MAX6352LSUK+T?
For technical support, including MAX6352LSUK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6352LSUK+T requirements.
6.How does Aetrix verify that MAX6352LSUK+T is sourced from the original manufacturer or authorized distributors?
All MAX6352LSUK+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 MAX6352LSUK+T meets industry standards.
7.What is the process for return or replacement of MAX6352LSUK+T?
All MAX6352LSUK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6352LSUK+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 MAX6352LSUK+T part is unused and in its original packaging.
Return procedure for MAX6352LSUK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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