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Analog Devices Inc./Maxim Integrated MAX6345MUT+T
- Part No.:
- MAX6345MUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6345MUT+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,228
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Product details
Overview
MAX6345MUT+T from Maxim Integrated is a dual-output microprocessor supervisory circuit in SOT23-6 packaging, providing both active-high push-pull RESET and active-low push-pull RESET outputs with factory-trimmed 4.38V VCC reset threshold, guaranteed reset validity down to VCC = +1V, and integrated 1.25V power-fail comparator for low-battery or auxiliary supply monitoring - used in multivoltage embedded systems requiring reliable power sequencing and orderly shutdown.
For engineers reviewing the MAX6345MUT+T datasheet, MAX6345MUT+T pinout, MAX6345MUT+T application, or MAX6345MUT+T equivalent, this device delivers deterministic reset timing (100ms min pulse width), CMOS-compatible manual reset input, glitch-immune VCC transient rejection, and dual independent reset polarity support without external components.
Technical Context
The MAX6345MUT+T integrates two independent reset generators: one asserting active-high RESET on VCC rise above 4.38V (±2.5% over -40°C to +125°C), and another asserting active-low RESET under identical conditions. Its internal 1.25V reference feeds a dedicated PFI comparator whose output (PFO) transitions independently of reset state.
Reset assertion is guaranteed valid for VCC ≥ +1V; both RESET outputs drive push-pull with VOH ≥ 0.8×VCC (ISOURCE = 500µA) and VOL ≤ 0.4V (ISINK = 1.2mA). MR input is debounced with 1µs minimum pulse width and accepts 0.3×VCC/0.7×VCC logic thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 4.38V ±2.5% (factory-trimmed, specified over -40°C to +125°C) |
| Supply Voltage Range | +1.0V to +5.5V - enables operation during brownout and supports wide-input systems |
| Reset Pulse Width | 100ms minimum - ensures µP initialization completes before release |
| PFO Comparator Threshold | +1.25V - fixed internal reference for accurate power-fail or battery-low detection |
| Operating Temperature | -40°C to +125°C - qualified for automotive under-hood and industrial edge applications |
| Supply Current | 25µA typical at +3V, +25°C - ultra-low quiescent current for battery longevity |
| RESET Output Type | Dual: active-high push-pull & active-low push-pull - eliminates need for external inverters or pull resistors |
Pinout & Package
Package: 6-pin SOT23-6, surface-mount, lead-free (RoHS-compliant), 1.6mm × 2.9mm footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Positive supply input | Primary power rail input; powers internal comparators, reset generator, and outputs |
| 2 - GND | Ground reference | Common return path for all internal circuits and output drivers |
| 3 - PFI | Power-fail monitor input | Connects to voltage divider for monitoring secondary supply; trips PFO when <1.25V |
| 4 - PFO | Power-fail comparator output | Open-drain output asserted low when PFI <1.25V; used for early-warning interrupts or MR triggering |
| 5 - RESET | Active-high push-pull reset output | Drives high after timeout (100ms+) when VCC >4.38V or MR deasserts; no external pull-up required |
| 6 - RESET | Active-low push-pull reset output | Drives low under same conditions as pin 5; provides complementary reset signal for mixed-logic systems |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent reset outputs | Simultaneous active-high and active-low push-pull signals eliminate level-shifting or inverter ICs |
| Factory-trimmed precision threshold | 4.38V ±2.5% over full temperature range ensures consistent reset point without calibration |
| Guaranteed reset validity to VCC = +1V | Enables robust reset assertion during deep brownout - critical for nonvolatile memory write protection |
| Integrated 1.25V power-fail comparator | Enables predictive shutdown via PFO interrupt before main supply collapse; no external reference needed |
| Debounced manual-reset input | MR accepts noisy switch inputs directly; 1µs internal filtering removes contact bounce without RC network |
Applications
| Portable/Battery-Powered Equipment | Telecom Equipment |
|---|---|
Use Scenario: Handheld medical monitor operating on single Li-ion cell with backup LDO. IC Role / Device Role / Timing Role: Supervises main 3.3V rail and monitors battery voltage via PFI divider; asserts dual RESET to halt MCU and trigger ADC-based battery estimation. Use Value: Prevents corrupted EEPROM writes during voltage sag; PFO interrupt initiates graceful data save before shutdown. |
Use Scenario: 48V-powered optical line terminal with hot-swap controller and multiple voltage domains. IC Role / Device Role / Timing Role: Monitors 3.3V management rail and uses PFI to track -12V bias supply; dual RESET coordinates FPGA and DSP startup sequencing. Use Value: Ensures deterministic power-up order across isolated domains; PFO-triggered MR forces reinitialization if bias rail fails mid-operation. |
| Multivoltage Systems | Embedded Control Systems |
Use Scenario: Industrial PLC with 5V, 3.3V, and 1.8V rails derived from single buck converter. IC Role / Device Role / Timing Role: Resets 3.3V domain while PFI monitors 5V rail; active-high RESET drives FPGA, active-low RESET drives ARM Cortex-M core. Use Value: Eliminates need for separate reset ICs per rail; dual outputs simplify PCB routing and reduce BOM count. |
Use Scenario: Automotive body control module with CAN interface and EEPROM logging. IC Role / Device Role / Timing Role: Provides fail-safe reset during cold-crank (VCC dip to 1.8V); PFO detects alternator failure by monitoring 12V-to-5V LDO input. Use Value: Maintains valid RESET assertion down to 1.0V VCC - prevents runaway code execution during engine start. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6344MUT+T | Single active-high push-pull RESET output; includes MR input; no active-low RESET | Lacks dual-reset capability - requires external inverter for active-low logic domains | Select when only one reset polarity is needed and board space is constrained |
| TPS3808G33DBVR | Single active-low open-drain RESET; 3.3V fixed threshold; no PFI/PFO function | No power-fail warning or auxiliary supply monitoring capability | Select for cost-sensitive 3.3V-only applications where early-warning functionality is unnecessary |
Compared with MAX6345MUT+T, MAX6344MUT+T omits the second reset output but retains MR and PFI/PFO, making it suitable for simpler systems; TPS3808G33DBVR offers lower cost and smaller footprint but sacrifices dual-output flexibility and power-fail detection - limiting use to basic single-rail supervision.
Availability
MAX6345MUT+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, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6345MUT+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 markets.
The MAX6342–MAX6345 family targets high-reliability digital systems needing deterministic power-on reset, brownout protection, and predictive power-fail response - especially where space-constrained SOT23 packaging and dual-reset polarity are critical.
FAQ
What is the factory-set reset threshold voltage for MAX6345MUT+T?
The MAX6345MUT+T has a factory-trimmed VCC reset threshold of 4.38V, with ±2.5% tolerance over the full operating temperature range (-40°C to +125°C). This value is laser-trimmed during production and does not require external adjustment. The 'M' suffix in MAX6345MUT+T explicitly denotes the 4.38V threshold variant per Maxim's Selector Guide 2.
Does MAX6345MUT+T support operation down to 1.0V VCC, and what does that mean for system design?
Yes, MAX6345MUT+T guarantees valid RESET output states (both active-high and active-low) for VCC ≥ +1.0V. This means the device continues asserting reset during severe brownout conditions - preventing microprocessor execution errors or incomplete nonvolatile memory writes. Designers can rely on this specification to protect firmware integrity in battery-depleted or cold-crank scenarios without adding external undervoltage lockout circuitry.
How does the PFI/PFO function work in MAX6345MUT+T, and what is its reference voltage?
The PFI input connects to an internal +1.25V comparator reference. When voltage at PFI falls below 1.25V, PFO (pin 4) goes low - enabling early-warning detection of power failure or low battery. PFI is high-impedance (leakage <1.2nA), allowing direct connection to resistor dividers. Unlike the main reset function, PFO operates independently and is not gated by VCC threshold crossing, making it ideal for preemptive system shutdown triggers.
What are the key differences between MAX6345MUT+T and MAX6342MUT+T?
MAX6345MUT+T provides both active-high and active-low push-pull RESET outputs (pins 5 and 6), while MAX6342MUT+T offers only active-low RESET (pin 6) plus a manual-reset input (MR) on pin 5. MAX6345MUT+T replaces MR with the second RESET output - eliminating manual reset capability but enabling simultaneous dual-polarity reset signaling. Both share identical VCC threshold (4.38V), PFI/PFO functionality, and SOT23-6 package.
Is MAX6345MUT+T pin-compatible with other members of the MAX6342–MAX6345 family?
Yes, all MAX6342–MAX6345 variants, including MAX6345MUT+T, use identical 6-pin SOT23-6 pinout and footprint. Pin assignments (VCC, GND, PFI, PFO, RESET, RESET) are fixed across the family. However, functional pin behavior differs: MAX6342/MAX6343/MAX6344 assign pin 5 to MR, whereas MAX6345 assigns pin 5 to active-high RESET - meaning PCB layout is compatible, but firmware or external logic must account for the missing MR function in MAX6345MUT+T.
MAX6345MUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.38V
- 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
MAX6345MUT+T FAQ
1.How can I place an order for MAX6345MUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6345MUT+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 MAX6345MUT+T reliable?
The price and inventory of MAX6345MUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6345MUT+T is usually 5 days.
3.What payment methods are accepted for MAX6345MUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6345MUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6345MUT+T?
MAX6345MUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6345MUT+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 MAX6345MUT+T?
For technical support, including MAX6345MUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6345MUT+T requirements.
6.How does Aetrix verify that MAX6345MUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6345MUT+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 MAX6345MUT+T meets industry standards.
7.What is the process for return or replacement of MAX6345MUT+T?
All MAX6345MUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6345MUT+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 MAX6345MUT+T part is unused and in its original packaging.
Return procedure for MAX6345MUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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