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Analog Devices Inc./Maxim Integrated MAX6342LUT+T
- Part No.:
- MAX6342LUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6342LUT+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,410
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Product details
Overview
MAX6342LUT+T from Maxim Integrated is a precision microprocessor supervisory circuit in SOT23-6 packaging, featuring a factory-trimmed 4.63V VCC reset threshold, active-low push-pull RESET output, and manual-reset (MR) input. It monitors supply voltage integrity and provides power-fail warning via PFI/PFO comparator, ensuring reliable reset assertion during power-up, brownout, or low-battery conditions in portable and telecom systems.
For engineers reviewing the MAX6342LUT+T datasheet, MAX6342LUT+T pinout, MAX6342LUT+T application, or MAX6342LUT+T equivalent, this device delivers guaranteed RESET validity down to VCC = +1V, 100ms minimum reset pulse width, and ±25mV reset threshold accuracy over –40°C to +125°C - critical for robust embedded power sequencing and fail-safe shutdown design.
Technical Context
The MAX6342LUT+T integrates a precision bandgap reference, comparator-based reset generator, and independent power-fail comparator with 1.25V internal threshold. Its reset logic asserts active-low RESET when VCC falls below 4.63V (±25mV), holding for ≥100ms after recovery or MR deassertion.
It supports bidirectional µP reset I/O interfacing via buffered output drive (800µA source / 3.2mA sink), operates across 1.0V–5.5V supply range, and rejects negative VCC transients ≤12µs at 100mV overdrive - enabling stable operation in noisy battery-powered environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 4.63V ±25mV - precisely set at factory; ensures deterministic reset activation at nominal 5V rail dropout |
| RESET Output Type | Active-low push-pull - drives low without external pull-up; sinks 3.2mA at VCC ≥4.5V for direct µP reset pin drive |
| Reset Pulse Width | 100ms min - guarantees sufficient duration to initialize all digital logic blocks during power recovery |
| Supply Voltage Range | +1.0V to +5.5V - enables operation down to near-dead-battery levels while maintaining valid RESET logic levels |
| PFI Threshold | +1.25V - fixed internal reference for configurable power-fail or low-battery warning using external resistor divider |
| Operating Temp | –40°C to +125°C - qualified for automotive under-hood and industrial edge computing applications |
| Supply Current | 1.2µA typical at VCC = 3V - ultra-low quiescent draw extends battery life in always-on monitoring circuits |
Pinout & Package
Package: 6-pin SOT23-6, surface-mount, lead-free (RoHS-compliant), 2.9mm × 1.6mm footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Positive supply input | Primary power rail connection; device operates from 1.0V–5.5V; powers internal comparators and output stage |
| 2 - GND | Ground reference | Return path for all internal circuitry and output current; must be low-impedance for noise immunity |
| 3 - PFI | Power-fail input | Monitors external voltage via resistor divider; asserts PFO when input falls below 1.25V |
| 4 - PFO | Power-fail output | Open-drain active-low signal indicating impending supply failure; used for µP interrupt or orderly shutdown |
| 5 - MR | Manual-reset input | CMOS-compatible active-low trigger; debounced internally; forces reset when pulled low |
| 6 - RESET | Active-low reset output | Push-pull driver; actively drives low during reset; holds for ≥100ms after VCC rise or MR release |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-set reset threshold | 4.63V ±25mV - eliminates external resistor calibration; reduces BOM count and layout sensitivity |
| Guaranteed RESET validity to VCC = +1V | Ensures clean reset assertion even during deep brownout or battery sag - no external pulldown needed |
| Dedicated power-fail comparator | Independent 1.25V reference with PFI/PFO pins - enables early-warning shutdown before main reset triggers |
| Debounced CMOS MR input | 1µs internal glitch rejection - allows direct pushbutton connection without RC filter or firmware debounce |
| Ultra-low supply current | 1.2µA typical - enables multi-year operation on coin-cell batteries in remote sensor or backup systems |
Applications
| Portable Computers | Telecom Equipment |
|---|---|
|
Use Scenario: Real-time battery voltage monitoring and graceful OS shutdown prior to critical depletion. IC Role / Device Role / Timing Role: Power-fail comparator (PFI/PFO) detects falling battery voltage; RESET prevents corrupted writes during last operational cycles. Use Value: Extends usable runtime by triggering controlled save-and-hibernate at 4.63V VCC threshold, avoiding sudden power loss crashes. |
Use Scenario: Hot-swap power module supervision in line cards with redundant 5V/3.3V rails. IC Role / Device Role / Timing Role: Dual-rail monitoring via PFI divider and primary VCC supervision; RESET holds system in reset until both supplies stabilize. Use Value: Prevents configuration errors during partial power-up by enforcing 100ms minimum reset hold time across all voltage domains. |
| Networking Equipment | Embedded Control Systems |
|
Use Scenario: FPGA configuration lockout during unstable 12V-to-3.3V DC/DC startup in switch/router PHY modules. IC Role / Device Role / Timing Role: VCC supervisor ensures FPGA remains held in reset until 3.3V rail settles within ±2% of 3.3V, verified by 4.63V threshold scaled via divider. Use Value: Eliminates bitstream corruption by synchronizing FPGA release with verified power stability - not just voltage presence. |
Use Scenario: Industrial PLC I/O module power sequencing where analog front-end must initialize before digital core. IC Role / Device Role / Timing Role: MR input triggered by analog subsystem ready signal; RESET releases microcontroller only after analog bias is stable. Use Value: Enables deterministic power-up order without software coordination - hardware-enforced dependency chain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6343LUT+T | Active-low open-drain RESET output instead of push-pull; requires external pull-up resistor | Better suited for wired-OR reset buses or mixed-voltage systems where RESET must interface with multiple supply domains | Select when level-shifting or bus arbitration is required; avoid if driving high-capacitance µP reset pins directly |
| TPS3808G33DBVR | 3.3V fixed reset threshold; 200ms reset timeout; no PFI/PFO comparator; SOT23-6 package | Lacks power-fail warning capability; optimized for single-rail 3.3V systems without secondary voltage monitoring | Choose for cost-sensitive 3.3V-only designs where early-warning shutdown is unnecessary |
Compared with MAX6342LUT+T, MAX6343LUT+T trades push-pull drive for bus-sharing flexibility, while TPS3808G33DBVR simplifies design for fixed 3.3V rails but removes programmable PFI monitoring - making MAX6342LUT+T uniquely suited for dual-threshold, battery-aware systems.
Availability
MAX6342LUT+T is available at Aetrix Electronics and suitable for portable computers, telecom equipment, and embedded control systems requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for MAX6342LUT+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 and mixed-signal ICs for power management, sensing, and interface applications in industrial, automotive, and communications markets.
The MAX6342–MAX6345 family was engineered specifically for high-reliability microprocessor supervision in space-constrained, wide-temperature, battery-critical systems - delivering integrated reset, manual reset, and power-fail warning in one 6-pin SOT23 package.
FAQ
What is the exact reset threshold voltage of the MAX6342LUT+T?
The MAX6342LUT+T has a factory-trimmed VCC reset threshold of 4.63V with ±25mV tolerance over the full –40°C to +125°C temperature range. This value is laser-trimmed during production and specified in the Electrical Characteristics table of the official Maxim datasheet (19-1568 Rev 2). The "L" suffix in MAX6342LUT+T explicitly denotes the 4.63V variant.
Does the MAX6342LUT+T provide power-fail detection capability?
Yes, the MAX6342LUT+T includes a dedicated power-fail comparator with a fixed +1.25V internal reference. The PFI pin accepts an external voltage (e.g., from a resistor divider), and when that voltage drops below 1.25V, the PFO pin asserts low - enabling early-warning shutdown before the main VCC reset threshold is breached. This function is fully independent of the RESET output timing.
Can the MAX6342LUT+T operate reliably at very low supply voltages?
Yes, the MAX6342LUT+T guarantees valid RESET output logic levels down to VCC = +1.0V - meaning it continues asserting reset correctly even as the supply sags near battery exhaustion. This is confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables, and distinguishes it from supervisors that only guarantee operation above 2.0V or 2.5V.
What is the minimum reset pulse width guaranteed by the MAX6342LUT+T?
The MAX6342LUT+T guarantees a minimum reset pulse width of 100ms after VCC rises above the 4.63V threshold or after the MR input is released. This timeout is internally generated and temperature-compensated, ensuring sufficient duration to initialize complex microprocessors, FPGAs, or memory subsystems - regardless of clock speed or boot sequence complexity.
Is the MAX6342LUT+T pin-compatible with other members of the MAX6342–MAX6345 family?
No - while all MAX6342–MAX6345 devices share the same SOT23-6 package and pinout, the MAX6342LUT+T is not functionally pin-compatible with MAX6344 or MAX6345 variants due to differing RESET output configurations. Specifically, MAX6342LUT+T has MR on pin 5 and active-low push-pull RESET on pin 6, whereas MAX6344 places active-high RESET on pin 6 and omits MR, and MAX6345 provides both RESET outputs but no MR.
MAX6342LUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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
MAX6342LUT+T FAQ
1.How can I place an order for MAX6342LUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6342LUT+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 MAX6342LUT+T reliable?
The price and inventory of MAX6342LUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6342LUT+T is usually 5 days.
3.What payment methods are accepted for MAX6342LUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6342LUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6342LUT+T?
MAX6342LUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6342LUT+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 MAX6342LUT+T?
For technical support, including MAX6342LUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6342LUT+T requirements.
6.How does Aetrix verify that MAX6342LUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6342LUT+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 MAX6342LUT+T meets industry standards.
7.What is the process for return or replacement of MAX6342LUT+T?
All MAX6342LUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6342LUT+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 MAX6342LUT+T part is unused and in its original packaging.
Return procedure for MAX6342LUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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