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Analog Devices Inc./Maxim Integrated MAX6345LUT+T
- Part No.:
- MAX6345LUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6345LUT+T.pdf
- Description:
- IC RESET MPU W/COMP SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:27,500
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Product details
Overview
MAX6345LUT+T from Maxim Integrated is a precision 6-pin SOT23 microprocessor supervisory circuit with dual active-high and active-low push-pull reset outputs, factory-trimmed 4.63V VCC reset threshold, +1.25V power-fail comparator input, and guaranteed RESET validity down to VCC = +1V. It monitors supply integrity in multivoltage embedded systems and provides early warning for brownout or battery depletion.
For engineers reviewing the MAX6345LUT+T datasheet, MAX6345LUT+T pinout, MAX6345LUT+T application, or MAX6345LUT+T equivalent, key selection criteria include dual-reset output polarity, 100ms minimum reset timeout, SOT23-6 footprint compatibility, and operation across –40°C to +125°C industrial temperature range.
Technical Context
The MAX6345LUT+T integrates a precision voltage detector for VCC monitoring (4.63V ±0.5% threshold), a dedicated +1.25V reference-based power-fail comparator (PFI/PFO), and independent reset generators for both RESET (active-high) and RESET (active-low) outputs. Its internal logic ensures synchronized assertion timing and glitch immunity during VCC transients.
Unlike MAX6342–MAX6344 variants, MAX6345LUT+T replaces the manual-reset (MR) input with a second reset output-enabling simultaneous high- and low-active reset signaling without external inversion or pull-up/pull-down dependencies. All outputs are push-pull, eliminating need for external biasing components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 4.63V ±0.5% - factory-trimmed for accurate brownout detection at nominal 5V rail |
| Reset Timeout Period | 100ms min - ensures µP initialization completes before release |
| Supply Voltage Range | +1.0V to +5.5V - supports operation during deep brownout and low-battery conditions |
| PFI Input Threshold | +1.25V - enables configurable power-fail or low-battery warning via external resistor divider |
| Operating Temperature | –40°C to +125°C - qualified for automotive under-hood and industrial control environments |
| Supply Current | 1.2µA typical at +25°C - ultra-low quiescent current for battery-backed applications |
| Output Drive | Push-pull RESET and RESET - drives high/low directly without external resistors |
Pinout & Package
MAX6345LUT+T is housed in a 6-pin SOT23-6 package (JEDEC MO-178AA), with 1.3mm × 2.1mm footprint and 0.95mm height-compatible with standard automated assembly processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Supply Input | Primary power rail input; powers internal comparators and reset generators |
| 2 - GND | Ground Reference | Analog and digital ground return path for all internal circuitry |
| 3 - PFI | Power-Fail Input | Monitors external voltage via resistor divider; trips PFO when < +1.25V |
| 4 - PFO | Power-Fail Output | Active-low open-drain signal indicating impending supply collapse or low battery |
| 5 - RESET | Active-High Reset Output | Push-pull output asserted high for ≥100ms after VCC rise or fault recovery |
| 6 - RESET | Active-Low Reset Output | Push-pull output asserted low for ≥100ms; enables direct interface to µP reset pins requiring active-low assertion |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent reset outputs | Simultaneous active-high and active-low push-pull signals eliminate need for level-shifting or inverting logic |
| Factory-trimmed 4.63V threshold | ±0.5% accuracy over –40°C to +125°C ensures reliable 5V system reset without external calibration |
| +1.25V precision reference | Enables accurate monitoring of secondary supplies (e.g., 3.3V, 2.5V, or battery) using simple resistor dividers |
| Guaranteed RESET validity to VCC = +1V | Ensures deterministic reset behavior during deep undervoltage events where other supervisors fail |
| 100ms minimum reset pulse width | Meets JEDEC JESD76 and Intel VRD requirements for robust µP initialization timing |
Applications
| Portable/Battery-Powered Equipment | Telecom Equipment |
|---|---|
Use Scenario: Real-time clock backup and firmware-safe shutdown during battery depletion. IC Role / Device Role / Timing Role: Power-fail comparator triggers orderly data save via PFO; dual reset outputs hold µP and peripheral ICs in known state. Use Value: Prevents corruption of nonvolatile memory writes by asserting both reset polarities before VBAT drops below critical threshold. | Use Scenario: Hot-swap controller supervision in line cards with redundant 5V/3.3V rails. IC Role / Device Role / Timing Role: Monitors primary 5V rail (VCC) and secondary 3.3V rail (via PFI divider); asserts RESET and RESET simultaneously on any rail failure. Use Value: Enables fail-safe reinitialization of FPGA configuration and SerDes PHY without software intervention. |
| Multivoltage Systems | Embedded Control Systems |
Use Scenario: Industrial PLC with mixed 24V, 5V, and 3.3V domains requiring coordinated reset sequencing. IC Role / Device Role / Timing Role: Uses PFI to monitor isolated 3.3V logic rail while VCC references main 5V supply; generates synchronized reset edges for all domains. Use Value: Eliminates race conditions between µP, ADC, and I/O drivers during power-up by guaranteeing monotonic reset release. | Use Scenario: Automotive body control module operating across wide temperature and supply ranges. IC Role / Device Role / Timing Role: Supervises 5V microcontroller supply and detects alternator dropout via PFI-connected voltage divider; operates from –40°C to +125°C. Use Value: Meets AEC-Q100 Grade 1 requirements with no derating needed-ensures ECU reliability during cold cranking and load dump. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6342LUT+T | Single active-low push-pull reset output; includes MR input instead of second reset output | Requires external inverter or logic to generate active-high reset signal | Select when manual reset capability is required and dual-polarity reset is not needed |
| TLV809LDBZR | Single active-low open-drain reset; no PFI/PFO comparator; 4.63V threshold; SOT23-3 package | Lacks power-fail warning and dual-output capability; smaller footprint but no secondary monitoring | Select for cost-sensitive, space-constrained designs where only basic reset is required |
Compared with MAX6342LUT+T and TLV809LDBZR, MAX6345LUT+T uniquely delivers concurrent active-high and active-low reset signaling plus integrated power-fail detection-reducing BOM count and PCB area while enabling advanced fault-handling architectures.
Availability
MAX6345LUT+T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, telecom equipment, multivoltage systems, and embedded control systems requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX6345LUT+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 precision analog, mixed-signal, and power management ICs for industrial, automotive, communications, and computing applications.
The MAX6342–MAX6345 family was developed specifically for high-reliability microprocessor supervision in harsh environments-emphasizing accuracy, low power, dual-output flexibility, and extended temperature operation.
FAQ
What is the reset threshold voltage of the MAX6345LUT+T?
The MAX6345LUT+T has a factory-trimmed VCC reset threshold of 4.63V with ±0.5% accuracy over –40°C to +125°C. This value is encoded in the part number suffix "L" per Maxim's selector guide and is verified in the Electrical Characteristics table of the official datasheet. The threshold remains stable across full supply voltage range (+1.0V to +5.5V) and temperature extremes.
Does the MAX6345LUT+T provide both active-high and active-low reset outputs?
Yes, the MAX6345LUT+T provides two independent push-pull reset outputs: pin 5 (RESET) is active-high, and pin 6 (RESET) is active-low. Unlike MAX6342–MAX6344 variants, MAX6345LUT+T replaces the manual-reset (MR) input with this second reset output-enabling direct interface to µPs and peripherals requiring either polarity without external components.
What is the function of the PFI and PFO pins on the MAX6345LUT+T?
The PFI (pin 3) is a power-fail input referenced to an internal +1.25V comparator; when voltage at PFI falls below +1.25V, the PFO (pin 4) output goes low. This allows monitoring of secondary supplies (e.g., 3.3V or battery) using a resistor divider. PFO is open-drain and requires a pull-up resistor; it operates independently of the reset outputs for early-warning signaling.
What is the minimum reset pulse width guaranteed by the MAX6345LUT+T?
The MAX6345LUT+T guarantees a minimum reset pulse width of 100ms (tRP) after VCC rises above the 4.63V threshold or after recovery from a fault condition. This value is specified across –40°C to +125°C and ensures compliance with JEDEC JESD76 and common µP initialization timing requirements.
Is the MAX6345LUT+T compatible with lead-free soldering processes?
Yes, the MAX6345LUT+T is offered in lead-free packaging, indicated by the "+T" suffix. It complies with RoHS Directive 2011/65/EU and supports standard reflow profiles including JEDEC J-STD-020D for moisture sensitivity level 1. The SOT23-6 package is rated for peak solder temperatures up to +300°C for 10 seconds.
MAX6345LUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6345LUT+T FAQ
1.How can I place an order for MAX6345LUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6345LUT+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 MAX6345LUT+T reliable?
The price and inventory of MAX6345LUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6345LUT+T is usually 5 days.
3.What payment methods are accepted for MAX6345LUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6345LUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6345LUT+T?
MAX6345LUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6345LUT+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 MAX6345LUT+T?
For technical support, including MAX6345LUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6345LUT+T requirements.
6.How does Aetrix verify that MAX6345LUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6345LUT+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 MAX6345LUT+T meets industry standards.
7.What is the process for return or replacement of MAX6345LUT+T?
All MAX6345LUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6345LUT+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 MAX6345LUT+T part is unused and in its original packaging.
Return procedure for MAX6345LUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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