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Analog Devices Inc./Maxim Integrated MAX6345RUT-T
- Part No.:
- MAX6345RUT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6345RUT-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6345RUT-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 2.63V VCC reset threshold, +1.25V power-fail comparator input (PFI), and guaranteed RESET assertion down to VCC = +1V. It monitors supply integrity in multivoltage embedded systems and provides early power-fail warning for orderly shutdown.
For engineers reviewing the MAX6345RUT-T datasheet, MAX6345RUT-T pinout, MAX6345RUT-T application, or MAX6345RUT-T equivalent, key selection criteria include dual-reset output polarity, 2.63V threshold accuracy over –40°C to +125°C, PFI/PFO monitoring capability, 100ms minimum reset timeout, and SOT23-6 package compatibility with space-constrained portable designs.
Technical Context
The MAX6345RUT-T integrates a precision bandgap reference, voltage comparators for VCC and PFI inputs, a reset timeout timer, and dual push-pull output drivers - all operating from +1V to +5.5V. Its reset generator asserts both RESET (active-high) and RESET (active-low) simultaneously for ≥100ms after VCC rises above 2.63V or MR transitions high.
The dedicated PFI input compares against an internal +1.25V reference, driving PFO low when PFI < 1.25V. This enables independent monitoring of secondary supplies (e.g., battery, auxiliary rail) without affecting reset timing or threshold stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.63V ±1.5% (factory-trimmed; ensures reliable µP reset at precise supply level) |
| Reset Timeout Period | 100ms min (guaranteed assertion duration prevents premature boot under brownout) |
| Supply Voltage Range | +1.0V to +5.5V (enables operation during deep brownout and supports wide-input systems) |
| PFI Input Threshold | +1.25V (fixed internal reference for accurate secondary supply or battery monitoring) |
| Output Drive | Push-pull RESET (active-high) and RESET (active-low); VOH ≥ 0.8×VCC, VOL ≤ 0.4V (direct interface to µP I/O without pull resistors) |
| Operating Temperature | –40°C to +125°C (qualified for automotive under-hood and industrial control environments) |
| Supply Current | 25µA typ at +3V (ultra-low quiescent current extends battery life in portable equipment) |
Pinout & Package
MAX6345RUT-T is housed in a 6-pin SOT23-6 package (JEDEC MO-178AA), 2.9mm × 1.6mm × 1.1mm, with gull-wing leads and RoHS-compliant lead-free finish (suffix "+T" denotes lead-free; "-T" is standard).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Positive supply input | Primary power rail monitored for reset; operates from +1.0V to +5.5V |
| 2 - GND | Ground reference | Common return for all internal comparators, timers, and outputs |
| 3 - PFI | Power-fail input | Monitors external voltage divider; asserts PFO when input falls below +1.25V |
| 4 - PFO | Power-fail output | Active-low open-drain signal indicating secondary supply failure or low-battery condition |
| 5 - RESET | Active-high push-pull reset | Drives high for ≥100ms after valid VCC rise or MR release; no external pull-up required |
| 6 - RESET | Active-low push-pull reset | Drives low for ≥100ms after valid VCC rise or MR release; no external pull-down required |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent reset outputs | Simultaneous active-high and active-low push-pull signals eliminate need for external inverters or level shifters in bidirectional µP reset interfaces |
| Factory-trimmed 2.63V threshold | ±1.5% accuracy over full temperature range ensures deterministic reset point without calibration |
| +1.25V precision PFI reference | Enables accurate monitoring of secondary rails (e.g., 3.3V, 2.5V, battery) via simple resistor divider - no external reference needed |
| Guaranteed RESET validity to VCC = +1V | Ensures clean, logic-valid reset assertion even during severe brownout conditions before system power collapse |
| 100ms minimum reset pulse width | Meets JEDEC JESD8-12B and Intel VRD/IMVP requirements for robust µP initialization across voltage transients |
Applications
| Portable/Battery-Powered Equipment | Telecom Power Management |
|---|---|
|
Use Scenario: Smart meter with Li-ion backup battery and primary AC/DC supply. IC Role / Device Role / Timing Role: Supervises main 3.3V rail and monitors battery voltage via PFI to trigger graceful shutdown before cutoff. Use Value: Dual RESET outputs drive separate enable lines for RF module and MCU; PFO interrupt initiates data save sequence 200ms before brownout. |
Use Scenario: 48V-powered optical line terminal with 3.3V/1.2V FPGA core rails. IC Role / Device Role / Timing Role: Primary supervisor for 3.3V FPGA I/O supply; PFI monitors 48V input via divider to detect upstream power loss. Use Value: Active-high RESET enables FPGA configuration; active-low RESET resets analog front-end ASIC - both synchronized to same 2.63V threshold event. |
| Multivoltage Embedded Systems | Industrial Control PLC Modules |
|
Use Scenario: Programmable logic controller with isolated 5V, 3.3V, and 2.5V domains. IC Role / Device Role / Timing Role: Monitors 3.3V domain while PFI tracks 5V rail; PFO triggers watchdog reset if 5V fails before 3.3V. Use Value: Eliminates need for two discrete supervisors; dual outputs simplify reset tree design across voltage islands. |
Use Scenario: DIN-rail mounted I/O module operating in –40°C to +85°C ambient with 24V DC input. IC Role / Device Role / Timing Role: Provides fail-safe reset for ARM Cortex-M7 processor and isolates PFO to signal power anomaly to host HMI. Use Value: Guaranteed operation to +125°C junction temperature ensures reliability in enclosed enclosures; 100ms timeout prevents spurious resets from EFT noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6342RUT-T | Single active-low push-pull RESET output; includes MR input (MAX6345 omits MR, adds RESET) | Lacks dual-output capability; requires external inverter for active-high reset path | Select when only one reset polarity is needed and manual reset functionality is required |
| TLV809RDBZR | Single active-low open-drain RESET; 2.63V threshold; no PFI/PFO or dual outputs | No power-fail monitoring; requires external pull-up; not suitable for bidirectional µP interfaces | Select for cost-sensitive, single-rail applications where PFI functionality and dual outputs are unnecessary |
Compared with MAX6342RUT-T and TLV809RDBZR, the MAX6345RUT-T uniquely delivers synchronized dual-polarity reset outputs and integrated power-fail detection in the same SOT23-6 footprint - enabling compact, robust supervision of complex multivoltage systems without external components.
Availability
MAX6345RUT-T is available at Aetrix Electronics and suitable for portable computers, telecom equipment, and industrial embedded systems requiring stable component supply, long-term lifecycle support, and guaranteed performance across –40°C to +125°C.
Supply support for MAX6345RUT-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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX6342–MAX6345 family was designed specifically for reliable microprocessor supervision in space- and power-constrained systems, emphasizing precision threshold accuracy, ultra-low supply current, and integrated power-fail warning capability.
FAQ
What is the exact reset threshold voltage of the MAX6345RUT-T?
The MAX6345RUT-T has a factory-trimmed VCC reset threshold of 2.63V, with ±1.5% tolerance over the full operating temperature range (–40°C to +125°C). This value is laser-trimmed during production and confirmed in the Electrical Characteristics table of the official datasheet. The "R" in the part number explicitly denotes the 2.63V variant, and the MAX6345RUT-T maintains this threshold stability without external calibration.
Does the MAX6345RUT-T provide manual reset (MR) functionality?
No, the MAX6345RUT-T does not include a manual-reset (MR) input. Unlike the MAX6342/MAX6343/MAX6344 variants, the MAX6345 replaces the MR pin with a second reset output (RESET). Pin 5 is RESET (active-high push-pull) and Pin 6 is RESET (active-low push-pull); Pin 5 on MAX6342–MAX6344 is MR. This configuration is confirmed in the Pin Description and Selector Guide sections of the datasheet.
How does the PFI/PFO function work in the MAX6345RUT-T?
The MAX6345RUT-T's PFI pin connects to an internal +1.25V comparator reference. When the voltage at PFI falls below +1.25V, the PFO output goes low - providing a power-fail or low-battery warning independent of the main reset function. PFO is an open-drain output, allowing wired-OR connection and flexible interfacing. This feature is fully documented in the "Power-Fail Comparator" section and Typical Operating Circuit of the MAX6345RUT-T datasheet.
What is the reset timeout period for the MAX6345RUT-T?
The MAX6345RUT-T guarantees a minimum reset timeout period of 100ms after VCC rises above the 2.63V threshold or after any reset initiation event. The typical timeout is 180ms, and the maximum is 280ms over temperature. This parameter (tRP) is specified in the Electrical Characteristics table and ensures sufficient hold time for microprocessor initialization, meeting JEDEC and common µP vendor requirements.
Is the MAX6345RUT-T compatible with 1.8V or 2.5V supply rails?
Yes, the MAX6345RUT-T operates from +1.0V to +5.5V and guarantees valid RESET assertion down to VCC = +1V. Its 2.63V reset threshold is appropriate for supervising 3.3V systems, and its wide supply range allows direct use with 2.5V rails (though reset will assert when VCC drops below 2.63V). For 1.8V systems, a different threshold variant (e.g., MAX6345SUT-T, 2.93V) or external divider would be required - the MAX6345RUT-T itself is not intended for 1.8V rail supervision.
MAX6345RUT-T 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:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.63V
- 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-23-6
MAX6345RUT-T FAQ
1.How can I place an order for MAX6345RUT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6345RUT-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 MAX6345RUT-T reliable?
The price and inventory of MAX6345RUT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6345RUT-T is usually 5 days.
3.What payment methods are accepted for MAX6345RUT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6345RUT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6345RUT-T?
MAX6345RUT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6345RUT-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 MAX6345RUT-T?
For technical support, including MAX6345RUT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6345RUT-T requirements.
6.How does Aetrix verify that MAX6345RUT-T is sourced from the original manufacturer or authorized distributors?
All MAX6345RUT-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 MAX6345RUT-T meets industry standards.
7.What is the process for return or replacement of MAX6345RUT-T?
All MAX6345RUT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6345RUT-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 MAX6345RUT-T part is unused and in its original packaging.
Return procedure for MAX6345RUT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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