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Analog Devices Inc./Maxim Integrated MAX6342LUT+
- Part No.:
- MAX6342LUT+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- -
- Datasheet:
-
MAX6342LUT+.pdf
- Description:
- IC RESET MPU W/COMP SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,693
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Product details
Overview
MAX6342LUT+ from Maxim Integrated is a precision microprocessor supervisory circuit in SOT23-6 package, featuring factory-trimmed 4.63V VCC reset threshold, active-low push-pull RESET output, and debounced manual-reset (MR) input. It monitors power supply integrity during power-up/down/brownout and provides a +1.25V power-fail comparator (PFI/PFO) for low-battery or auxiliary supply warning in portable and telecom systems.
For engineers reviewing the MAX6342LUT+ datasheet, MAX6342LUT+ pinout, MAX6342LUT+ application, or MAX6342LUT+ equivalent, this device delivers guaranteed RESET assertion down to VCC = +1V, 100ms minimum reset timeout, and validated operation across –40°C to +125°C - critical for battery-powered equipment, multivoltage embedded controllers, and industrial telecom modules requiring deterministic reset behavior.
Technical Context
The MAX6342LUT+ integrates a precision bandgap reference, voltage comparator with hysteresis, reset timer, and CMOS-compatible MR input logic. Its reset generator asserts RESET low when VCC falls below 4.63V (±2.5% over temperature), holding it for ≥100ms after VCC recovers above threshold or MR transitions high.
The independent +1.25V PFI comparator enables external voltage monitoring via resistor divider; PFO asserts low when PFI < 1.25V. RESET output is push-pull, capable of sourcing 800µA at VCC > 4.5V and sinking 3.2mA - eliminating need for external pull-up resistors unlike open-drain variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 4.63V ±2.5% over –40°C to +125°C - ensures reliable reset initiation at precise supply rail margin |
| RESET Pulse Width | 100ms min - guarantees µP initialization completes before release, even under slow-rising VCC |
| Supply Voltage Range | +1.0V to +5.5V - supports operation during deep brownout and compatibility with 1.2V–5V system rails |
| PFI Comparator Threshold | +1.25V ±100mV - enables accurate power-fail or low-battery detection using external resistor divider |
| RESET Output Type | Active-low push-pull - drives RESET line directly without external pull-up, simplifying PCB layout |
| MR Input Compatibility | CMOS-level, debounced - accepts direct pushbutton connection with no external RC filtering required |
| Operating Temperature | –40°C to +125°C - qualified for automotive under-hood, industrial control, and extended-range telecom use |
Pinout & Package
Package: 6-pin SOT23-6, 1.6mm × 2.9mm footprint, lead-free (RoHS-compliant) variant denoted by '+' suffix.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Positive supply input | Primary power rail input; device operates from +1.0V to +5.5V; powers internal comparators and reset logic |
| 2 - GND | Ground reference | Analog and digital ground return; must be low-impedance path to ensure comparator accuracy and noise immunity |
| 3 - PFI | Power-fail monitor input | Connects to voltage divider for monitoring secondary supply; asserts PFO low when voltage < +1.25V |
| 4 - PFO | Power-fail comparator output | Open-drain output; sinks current when PFI < 1.25V - used for early-warning interrupt or shutdown sequencing |
| 5 - MR | Manual-reset input | Active-low CMOS input; pulling low forces RESET assertion regardless of VCC level; debounced internally |
| 6 - RESET | Active-low reset output | Push-pull driver; actively drives low during reset and high otherwise - compatible with µP reset pins requiring driven high/low states |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-set reset threshold | 4.63V trimmed at wafer level with ±2.5% max tolerance over full temperature range - eliminates external resistor calibration |
| Guaranteed RESET validity to VCC = +1V | RESET output remains logic-valid (VOH/VOL within spec) even as VCC drops to 1.0V - prevents spurious release during brownout |
| Dedicated power-fail comparator | Independent +1.25V reference and PFI/PFO pair enables dual-supply monitoring without sharing reset timing path |
| Debounced MR input | Internal 1µs minimum pulse rejection eliminates mechanical switch bounce - removes need for external RC or Schmitt trigger |
| SOT23-6 miniature package | 1.6mm × 2.9mm footprint with 0.95mm height - enables integration into space-constrained portable and modular telecom designs |
Applications
| Portable/Battery-Powered Equipment | Telecom Line Cards |
|---|---|
|
Use Scenario: Smart meter with lithium-thionyl chloride battery and 3.3V LDO powering MCU and RF transceiver. IC Role / Device Role / Timing Role: Supervises main 3.3V rail and monitors battery voltage decay via PFI divider to trigger graceful shutdown before cutoff. Use Value: Prevents data corruption during low-battery brownout and extends usable battery life by enabling firmware-controlled save-and-sleep before power loss. |
Use Scenario: Carrier-grade Ethernet switch line card with dual 12V/3.3V supplies and hot-swap controller. IC Role / Device Role / Timing Role: Monitors 3.3V core rail for brownout; PFO tied to FPGA interrupt to initiate link retraining before reset assertion. Use Value: Enables zero-downtime failover by detecting marginal supply conditions before full reset, reducing packet loss during transient events. |
| Multivoltage Embedded Systems | Industrial Control Modules |
|
Use Scenario: PLC I/O module with isolated 24V field bus, 5V logic, and 1.8V FPGA core. IC Role / Device Role / Timing Role: Uses PFI to monitor 5V rail while RESET controls FPGA and MCU; MR connected to service button for field firmware recovery. Use Value: Ensures synchronized reset across heterogeneous voltage domains and supports safe field updates without disassembly. |
Use Scenario: DIN-rail mounted motor drive with 48V DC input, 15V gate driver, and 3.3V controller supply. IC Role / Device Role / Timing Role: Resets DSP and gate driver logic on 3.3V rail failure; PFO triggers pre-fault logging via CAN before shutdown. Use Value: Captures fault diagnostics prior to power collapse, accelerating root-cause analysis in harsh EMI environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6343LUT+ | Same 4.63V threshold and SOT23-6 package, but features active-low open-drain RESET instead of push-pull | Requires external pull-up resistor; suitable where RESET line must interface with multiple voltage domains or wired-OR logic | Select when system design mandates level-shiftable or shared reset bus architecture |
| TLV803EB29DBVR | 2.93V fixed reset threshold, SOT23-5 package, no PFI/PFO comparator, 200ms reset timeout | Lacks power-fail monitoring capability; smaller footprint but single-rail only; lower temp range (–40°C to +125°C same) | Choose for cost-sensitive, single-supply applications where auxiliary voltage monitoring is unnecessary |
Compared with MAX6342LUT+, MAX6343LUT+ trades push-pull drive for open-drain flexibility at the cost of added BOM component, while TLV803EB29DBVR reduces feature set and package size but omits critical PFI functionality - making MAX6342LUT+ the optimal choice for dual-monitoring, space-constrained, wide-temperature embedded systems.
Availability
MAX6342LUT+ 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 RoHS-compliant packaging.
Supply support for MAX6342LUT+ 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 multivoltage, battery-critical, and extended-temperature systems - emphasizing accuracy, low-voltage operation, and integrated power-fail warning.
FAQ
What is the exact reset threshold voltage of the MAX6342LUT+?
The MAX6342LUT+ has a factory-trimmed VCC reset threshold of 4.63V, with a maximum tolerance of ±2.5% over the full operating temperature range of –40°C to +125°C. This value is laser-trimmed during production and confirmed in the Electrical Characteristics table of the official datasheet. The 'L' suffix in MAX6342LUT+ explicitly denotes the 4.63V variant per Maxim's Selector Guide 1.
Does the MAX6342LUT+ provide power-fail detection capability?
Yes, the MAX6342LUT+ includes a dedicated +1.25V power-fail comparator with PFI (input) and PFO (output) pins. When the voltage at PFI falls below +1.25V, PFO goes low - enabling early-warning detection for low-battery conditions, auxiliary supply failure, or pre-brownout signaling. This function operates independently of the main reset circuitry and is fully specified across temperature.
What is the RESET output configuration of the MAX6342LUT+?
The MAX6342LUT+ features an active-low push-pull RESET output (pin 6). Unlike open-drain variants, it actively drives both high and low states - sourcing up to 800µA and sinking up to 3.2mA - eliminating the need for an external pull-up resistor. This simplifies interface with modern µPs that require driven reset signals rather than open-collector wiring.
Can the MAX6342LUT+ operate reliably during deep brownout conditions?
Yes, the MAX6342LUT+ is guaranteed to maintain valid RESET logic levels down to VCC = +1.0V, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables. Its internal circuitry remains functional and asserts RESET correctly even as supply voltage collapses - a key differentiator versus supervisory ICs that lose output validity below ~1.8V.
Is the MAX6342LUT+ pin-compatible with other members of the MAX6342–MAX6345 family?
No - while all MAX6342–MAX6345 devices share the same SOT23-6 package and pinout numbering, their pin functions differ. For example, MAX6342LUT+ uses pin 6 as active-low push-pull RESET and pin 5 as MR, whereas MAX6344LUT+ uses pin 6 as active-high RESET and pin 5 as PFO. Substituting without verifying signal mapping will cause functional failure.
MAX6342LUT+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- -
- Series:
- *
- Packaging:
- Product Status:
- Active
- Reference Type:
- -
- Output Type:
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Tolerance:
- -
- Temperature Coefficient:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX6342LUT+ FAQ
1.How can I place an order for MAX6342LUT+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6342LUT+ 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+ reliable?
The price and inventory of MAX6342LUT+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6342LUT+ is usually 5 days.
3.What payment methods are accepted for MAX6342LUT+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6342LUT+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6342LUT+?
MAX6342LUT+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6342LUT+ 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+?
For technical support, including MAX6342LUT+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6342LUT+ requirements.
6.How does Aetrix verify that MAX6342LUT+ is sourced from the original manufacturer or authorized distributors?
All MAX6342LUT+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX6342LUT+?
All MAX6342LUT+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6342LUT+, 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+ part is unused and in its original packaging.
Return procedure for MAX6342LUT+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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