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Analog Devices Inc./Maxim Integrated MAX6342MUT+T
- Part No.:
- MAX6342MUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6342MUT+T.pdf
- Description:
- IC RESET MPU W/COMP SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,327
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Product details
Overview
MAX6342MUT+T from Maxim Integrated is a precision microprocessor supervisory circuit with factory-trimmed 4.38V VCC reset threshold, active-low push-pull RESET output, manual-reset (MR) input, and power-fail comparator (PFI/PFO). It operates from +1V to +5.5V supply, guarantees RESET validity down to VCC = +1V, and delivers ≥100ms reset pulse width. Used in portable/battery-powered systems for reliable power-up sequencing and brownout protection.
For engineers reviewing the MAX6342MUT+T datasheet, MAX6342MUT+T pinout, MAX6342MUT+T application, or MAX6342MUT+T equivalent, key selection criteria include its 4.38V reset threshold tolerance (±25mV), -40°C to +125°C operating range, SOT23-6 package, debounced MR input, and independent 1.25V PFI comparator for low-battery warning or secondary supply monitoring.
Technical Context
The MAX6342MUT+T integrates a precision bandgap-based reset threshold detector, a CMOS-compatible manual-reset input with 1µs glitch rejection, and a dedicated 1.25V reference comparator for PFI. Its RESET generator asserts active-low for ≥100ms after VCC rises above 4.38V or MR transitions high.
It features guaranteed operation down to VCC = +1V, push-pull RESET output capable of sourcing 500µA at VCC > 2.7V and sinking 1.2mA at VCC > 2.7V, and PFO output that goes low when PFI falls below 1.25V - enabling early power-fail detection without affecting reset timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 4.38V ±25mV at -40°C to +125°C - ensures deterministic reset assertion during 3.3V or 5V rail brownout |
| Supply Voltage Range | +1.0V to +5.5V - supports operation during deep brownout and enables use with ultra-low-VCC logic |
| RESET Pulse Width | 100ms min - meets µP minimum reset hold time requirements across full temperature range |
| RESET Output Type | Active-low push-pull - eliminates external pull-up resistor, drives directly into µP reset pin |
| PFI Threshold | +1.25V - enables accurate low-battery detection or secondary supply monitoring via resistor divider |
| MR Input Compatibility | CMOS-level, debounced - accepts direct pushbutton connection without external RC filtering |
| Operating Temperature | -40°C to +125°C - qualified for automotive under-hood and industrial embedded environments |
Pinout & Package
MAX6342MUT+T is housed in a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm), optimized for space-constrained portable and battery-powered designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Positive supply input | Accepts +1.0V to +5.5V; powers internal comparators and RESET driver |
| 2 - GND | Ground reference | Return path for all internal circuits and RESET output current |
| 3 - PFI | Power-fail monitor input | Compares external voltage against 1.25V reference; triggers PFO when <1.25V |
| 4 - PFO | Power-fail comparator output | Active-low open-drain output; signals impending supply collapse before reset activates |
| 5 - MR | Manual-reset input | CMOS-compatible active-low input; forces RESET assertion when pulled low |
| 6 - RESET | Active-low reset output | Push-pull driver; holds low ≥100ms after VCC exceeds 4.38V or MR release |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-set reset threshold | 4.38V with ±25mV max deviation over -40°C to +125°C - eliminates calibration and reduces BOM count |
| Guaranteed RESET validity to VCC = +1V | Ensures clean, logic-valid reset signal even during severe brownout - prevents µP latch-up or undefined state |
| Dedicated 1.25V PFI comparator | Enables independent early-warning detection of power failure or low battery without interfering with reset timing |
| Debounced MR input | 1µs minimum pulse width rejection - allows direct pushbutton interface without external debounce circuitry |
| SOT23-6 footprint | Minimizes PCB area and thermal mass; compatible with standard high-volume pick-and-place assembly |
Applications
| Portable/Battery-Powered Equipment | Telecom Power Management |
|---|---|
|
Use Scenario: Smart meter with Li-ion backup battery monitoring voltage decay during grid outage. IC Role / Device Role / Timing Role: MAX6342MUT+T monitors main 3.3V rail and uses PFI to detect battery voltage drop below 3.0V via resistor divider. Use Value: Generates early PFO alert to initiate data save, then asserts RESET when VCC falls below 4.38V - ensuring controlled shutdown before data corruption. |
Use Scenario: Optical line terminal (OLT) with dual 5V/3.3V supplies requiring coordinated reset sequencing. IC Role / Device Role / Timing Role: MAX6342MUT+T supervises primary 5V rail while PFI monitors 3.3V rail via voltage divider; PFO interrupts µP to flag secondary rail fault. Use Value: Enables prioritized reset response: main rail failure triggers immediate RESET; secondary rail fault triggers firmware-handled recovery - improving system uptime. |
| Multivoltage Embedded Systems | Industrial Control HMI |
|
Use Scenario: PLC controller with separate 5V analog, 3.3V digital, and 1.8V core rails. IC Role / Device Role / Timing Role: MAX6342MUT+T supervises 5V rail (VCC); PFI monitors 3.3V rail; RESET drives FPGA configuration logic. Use Value: Guarantees FPGA resets only after stable 5V is present and holds RESET until both rails are validated - preventing partial configuration errors. |
Use Scenario: Human-machine interface panel operating in factory environment with voltage transients on 24V-to-5V DC/DC output. IC Role / Device Role / Timing Role: MAX6342MUT+T provides immunity to short VCC glitches (≤12µs at 100mV overdrive) while asserting RESET on sustained brownout. Use Value: Prevents spurious reboots from EMI-induced dips, yet responds reliably to actual power loss - enhancing UI reliability and user trust. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6343MUT+T | Same 4.38V threshold and SOT23-6 package, but features open-drain RESET instead of push-pull | Requires external pull-up resistor; suitable where RESET must interface with multiple voltage domains | Select when level-shifting or wired-OR reset bus is required; not drop-in compatible due to output structure |
| TLV803EB29DBVR | 2.93V fixed reset threshold, SOT23-5 package, no PFI/PFO function, 35µA typical ICC | Lacks power-fail warning capability and manual reset; limited to single-rail supervision | Choose for cost-sensitive, single-threshold applications without secondary monitoring needs; different pinout and no MR |
Compared with MAX6343MUT+T and TLV803EB29DBVR, the MAX6342MUT+T uniquely combines 4.38V precision reset, integrated PFI/PFO, MR input, and push-pull RESET in SOT23-6 - making it optimal for compact, feature-complete supervision in battery-aware and multirail systems.
Availability
MAX6342MUT+T is available at Aetrix Electronics and suitable for portable computers, telecom equipment, and industrial embedded control systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6342MUT+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 demanding industrial, automotive, and communications applications.
The MAX6342–MAX6345 family was engineered specifically for high-reliability microprocessor supervision in space- and power-constrained systems, emphasizing factory-trimmed accuracy, wide temperature operation, and integrated power-fail warning.
FAQ
What is the exact reset threshold voltage of the MAX6342MUT+T?
The MAX6342MUT+T has a factory-trimmed nominal reset threshold of 4.38V, with a maximum deviation of ±25mV over the full -40°C to +125°C operating temperature range. This value is laser-trimmed during production and specified in the Electrical Characteristics table under "Reset Threshold (VTH)" for the 'M' suffix variant. The threshold remains stable across supply voltages from +1.0V to +5.5V.
Does the MAX6342MUT+T provide power-fail detection capability?
Yes, the MAX6342MUT+T includes a dedicated power-fail comparator with a precise +1.25V internal reference. The PFI pin accepts an external voltage (e.g., from a resistor divider), and when that voltage falls below 1.25V, the PFO pin asserts low. This enables early-warning detection of falling supply rails or battery voltage decay - independent of the main reset function - allowing firmware to initiate graceful shutdown before VCC crosses the 4.38V reset threshold.
What is the function of the MR pin on the MAX6342MUT+T?
The MR (Manual Reset) pin on the MAX6342MUT+T is an active-low, CMOS-compatible input that forces the RESET output low when asserted. It features built-in 1µs glitch rejection, enabling direct connection to a mechanical pushbutton without external RC filtering. When MR is pulled low, RESET remains active for the full timeout period (≥100ms) after MR returns high, ensuring µP reset hold time compliance. If unused, MR should be tied to VCC.
Can the MAX6342MUT+T operate reliably at very low supply voltages?
Yes, the MAX6342MUT+T is guaranteed to assert a valid logic-level RESET signal down to VCC = +1.0V, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables. This ensures robust reset behavior during deep brownout conditions where other supervisors may fail to drive RESET correctly. The device continues monitoring and will deassert RESET only after VCC rises above 4.38V and remains stable for ≥100ms.
What package type and footprint does the MAX6342MUT+T use?
The MAX6342MUT+T is supplied in a 6-pin SOT23-6 package (package code SOT23-6), measuring 2.9mm × 1.6mm × 1.1mm. Its pinout matches the industry-standard SOT23-6 outline (JEDEC MO-178), with pins assigned as VCC, GND, PFI, PFO, MR, and RESET. The '+T' suffix indicates lead-free, RoHS-compliant packaging - verified by Maxim's top mark "AACQ" per the SOT Top Marks table.
MAX6342MUT+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:
- 4.38V
- 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
MAX6342MUT+T FAQ
1.How can I place an order for MAX6342MUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6342MUT+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 MAX6342MUT+T reliable?
The price and inventory of MAX6342MUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6342MUT+T is usually 5 days.
3.What payment methods are accepted for MAX6342MUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6342MUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6342MUT+T?
MAX6342MUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6342MUT+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 MAX6342MUT+T?
For technical support, including MAX6342MUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6342MUT+T requirements.
6.How does Aetrix verify that MAX6342MUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6342MUT+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 MAX6342MUT+T meets industry standards.
7.What is the process for return or replacement of MAX6342MUT+T?
All MAX6342MUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6342MUT+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 MAX6342MUT+T part is unused and in its original packaging.
Return procedure for MAX6342MUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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