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Analog Devices Inc./Maxim Integrated MAX6343LUT+T
- Part No.:
- MAX6343LUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6343LUT+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,269
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Product details
Overview
MAX6343LUT+T from Maxim Integrated is a precision microprocessor supervisory circuit with active-low open-drain reset output, factory-trimmed 4.63V VCC reset threshold, +1.25V power-fail comparator input (PFI), and operation down to VCC = +1V. It monitors supply integrity in battery-powered systems and provides reliable reset assertion during brownout or startup, ensuring deterministic µP initialization in portable telecom equipment.
For engineers reviewing the MAX6343LUT+T datasheet, MAX6343LUT+T pinout, MAX6343LUT+T application, or MAX6343LUT+T equivalent, key selection criteria include its open-drain RESET configuration, guaranteed 100ms minimum reset pulse width, PFI-based low-battery warning capability, and SOT23-6 package compatibility with space-constrained embedded designs.
Technical Context
The MAX6343LUT+T implements a precision bandgap-based voltage reference for both the 4.63V VCC reset comparator and the independent +1.25V PFI comparator. Its internal reset generator guarantees valid logic-level output down to VCC = +1V, enabling robust reset assertion even during deep brownout conditions.
It features a debounced CMOS-compatible manual-reset (MR) input with 1µs minimum glitch rejection and 100ns minimum pulse width tolerance. The open-drain RESET output supports flexible voltage translation via external pull-up to any supply ≤ +5.5V, making it suitable for mixed-voltage system interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 4.63V ±1.5% - Factory-trimmed precision threshold ensures accurate power-on reset timing for 5V systems. |
| PFI Threshold | +1.25V - Enables configurable power-fail or low-battery detection using external resistor divider. |
| Reset Pulse Width | 100ms min - Guarantees sufficient duration to fully initialize microprocessors and peripherals. |
| Supply Voltage Range | +1.0V to +5.5V - Supports operation during deep brownout and compatibility with 1.2V–5V logic domains. |
| Operating Temperature | −40°C to +125°C - Qualified for automotive under-hood and industrial embedded environments. |
| Supply Current | 1.2µA typ at VCC = 3V - Ultra-low quiescent current extends battery life in portable applications. |
| RESET Output Type | Active-low open-drain - Allows wired-OR configuration and level-shifting with external pull-up. |
Pinout & Package
MAX6343LUT+T is housed in a RoHS-compliant 6-pin SOT23-6 package (JEDEC MO-178AA), measuring 2.9mm × 1.6mm × 1.1mm, optimized for high-density PCB layouts in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Positive supply input | Primary power rail connection; device operates from +1.0V to +5.5V with full specification compliance. |
| 2 - GND | Ground reference | Return path for all internal circuits and comparator references; 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 | Active-low open-drain signal indicating PFI threshold violation; used for early-warning shutdown or interrupt. |
| 5 - MR | Manual-reset input | CMOS-compatible active-low trigger; debounced internally to reject <1µs glitches and force reset on demand. |
| 6 - RESET | Reset output | Active-low open-drain output; requires external pull-up; remains asserted ≥100ms after VCC rise or MR release. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 4.63V with ±1.5% tolerance over −40°C to +125°C - eliminates external calibration and improves system reliability. |
| Power-fail comparator independence | Dedicated +1.25V reference and PFI/PFO path - enables concurrent reset supervision and predictive power-loss signaling without interference. |
| Ultra-low supply current | 1.2µA typical at 3V - reduces standby power in always-on battery systems by >90% vs. discrete solutions. |
| Valid reset down to VCC = +1V | Guaranteed logic-level output assertion at VCC ≥ +1V - ensures fail-safe behavior during severe brownout before complete power collapse. |
| SOT23-6 footprint | Industry-standard 6-pin package - enables drop-in replacement in existing designs and compatibility with automated SMT assembly. |
Applications
| Portable Telecom Equipment | Battery-Powered IoT Sensors |
|---|---|
Use Scenario: Cellular base station remote units powered by Li-ion packs with variable discharge profiles. IC Role / Device Role / Timing Role: Supervises main 3.3V rail and triggers graceful shutdown via PFO when battery voltage drops below 3.2V (configured via PFI divider). Use Value: Prevents data corruption during low-battery brownout by asserting RESET before µP execution becomes unreliable. |
Use Scenario: Wireless environmental sensor node operating on coin-cell battery with 10-year target lifetime. IC Role / Device Role / Timing Role: Provides power-on reset and monitors backup supply; PFO interrupts µP to initiate sleep mode when primary voltage dips. Use Value: 1.2µA quiescent current minimizes parasitic drain, extending operational life without compromising reset integrity. |
| Multivoltage Embedded Systems | Industrial Control Modules |
Use Scenario: PLC I/O module with separate 5V logic, 3.3V MCU, and 2.5V ADC rails. IC Role / Device Role / Timing Role: Monitors 5V rail with 4.63V threshold; PFO tied to MR to assert RESET if 3.3V rail fails (via secondary divider on PFI). Use Value: Single IC replaces dual-supervisory discrete solution, reducing BOM count and board area by 40%. |
Use Scenario: Motor drive controller exposed to wide ambient temperature swings (−40°C to +125°C). IC Role / Device Role / Timing Role: Ensures deterministic µP reset during cold-start and thermal cycling; RESET holds until stable 5V rail exceeds 4.63V for ≥100ms. Use Value: −40°C to +125°C qualification and 100ms timeout guarantee prevent spurious resets in harsh factory environments. |
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 | Active-low push-pull RESET output instead of open-drain; includes MR input. | Requires no external pull-up; unsuitable where wired-OR reset bus or level translation is needed. | Select when driving single-load µP reset pin directly without shared bus requirements. |
| TLV809KDBZR | Fixed 3.08V reset threshold; no PFI/PFO functionality; SOT23-3 package. | Lacks power-fail monitoring and manual reset; limited to basic VCC supervision only. | Select only for cost-sensitive, single-rail applications where early-warning capability is unnecessary. |
Compared with MAX6342LUT+T, the MAX6343LUT+T offers open-drain flexibility for multi-supply systems but requires an external pull-up; compared with TLV809KDBZR, it delivers full power-fail intelligence and wider voltage range at higher integration density.
Availability
MAX6343LUT+T is available at Aetrix Electronics and suitable for portable computers, telecom equipment, and battery-powered equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6343LUT+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 semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX6342–MAX6345 family was designed specifically for reliable power-supply monitoring in space- and power-constrained digital systems, emphasizing precision threshold accuracy, ultra-low current, and dual-comparator architecture.
FAQ
What is the reset threshold voltage of the MAX6343LUT+T?
The MAX6343LUT+T has a factory-trimmed VCC reset threshold of 4.63V with ±1.5% tolerance over the full −40°C to +125°C temperature range. This value is encoded in the part number suffix 'L' per Maxim's Selector Guide 1, and is verified in the Electrical Characteristics table under VTH parameter. The MAX6343LUT+T uses this precise threshold to assert RESET when the monitored 5V supply falls below specification.
Does the MAX6343LUT+T support manual reset functionality?
Yes, the MAX6343LUT+T includes a debounced CMOS-compatible manual-reset (MR) input on Pin 5. Pulling MR low forces an immediate active-low RESET assertion, which remains active for ≥100ms after MR returns high. The internal 1µs minimum glitch rejection prevents false triggering from switch bounce, and the MR pin accepts logic levels referenced to VCC, making it compatible with standard µP GPIOs.
How does the power-fail comparator work in the MAX6343LUT+T?
The MAX6343LUT+T integrates an independent +1.25V precision reference connected to the inverting input of the PFI comparator. When the voltage applied to Pin 3 (PFI) falls below +1.25V - typically configured via a resistor divider from a secondary supply - Pin 4 (PFO) goes low. This allows early-warning detection of power failure or low battery before the main VCC rail collapses, enabling orderly µP shutdown or state save.
What is the output configuration of the RESET pin on the MAX6343LUT+T?
The RESET output on the MAX6343LUT+T (Pin 6) is an active-low open-drain driver. It sinks current when asserted and requires an external pull-up resistor to a logic-compatible voltage (≤ +5.5V). This configuration supports wired-OR reset buses, level translation across voltage domains, and interface with µPs that require externally pulled reset lines - a key distinction from the push-pull variants in the same family.
Is the MAX6343LUT+T qualified for automotive or industrial temperature ranges?
Yes, the MAX6343LUT+T is fully specified and tested over −40°C to +125°C, meeting industrial and under-hood automotive requirements. Its electrical characteristics - including reset threshold accuracy, supply current, and reset timeout - are guaranteed across this full range, and the SOT23-6 package is qualified for reflow and thermal cycling per JEDEC standards. This makes the MAX6343LUT+T suitable for demanding embedded control and telecom infrastructure applications.
MAX6343LUT+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:
- Open Drain or Open Collector
- 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
MAX6343LUT+T FAQ
1.How can I place an order for MAX6343LUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6343LUT+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 MAX6343LUT+T reliable?
The price and inventory of MAX6343LUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6343LUT+T is usually 5 days.
3.What payment methods are accepted for MAX6343LUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6343LUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6343LUT+T?
MAX6343LUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6343LUT+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 MAX6343LUT+T?
For technical support, including MAX6343LUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6343LUT+T requirements.
6.How does Aetrix verify that MAX6343LUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6343LUT+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 MAX6343LUT+T meets industry standards.
7.What is the process for return or replacement of MAX6343LUT+T?
All MAX6343LUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6343LUT+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 MAX6343LUT+T part is unused and in its original packaging.
Return procedure for MAX6343LUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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