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Analog Devices Inc./Maxim Integrated MAX6342TUT+T
- Part No.:
- MAX6342TUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6342TUT+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:985
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Product details
Overview
MAX6342TUT+T from Maxim Integrated is a precision microprocessor supervisory circuit in SOT23-6 package, featuring factory-trimmed 3.08V VCC reset threshold, active-low push-pull RESET output, and debounced 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 multivoltage systems.
For engineers reviewing the MAX6342TUT+T datasheet, MAX6342TUT+T pinout, MAX6342TUT+T application, or MAX6342TUT+T equivalent, key selection criteria include guaranteed RESET validity down to VCC = +1V, 100ms minimum reset timeout, ±25mV reset threshold accuracy over temperature, and compatibility with battery-powered telecom and embedded control designs requiring robust power monitoring.
Technical Context
The MAX6342TUT+T implements a precision bandgap-based reset generator with a fixed 3.08V VCC threshold (±25mV over –40°C to +125°C), and integrates a separate +1.25V reference for the PFI comparator. Its MR input is CMOS-compatible with 0.3×VCC/0.7×VCC logic thresholds and 1µs glitch rejection.
RESET asserts low for ≥100ms after VCC rises above threshold or MR transitions high, with guaranteed valid logic levels down to VCC = +1V. The push-pull output drives up to 1.2mA sink at VCC > 2.7V and sources 50µA at 0.8×VCC, enabling direct interface to µP reset inputs without external pull-ups.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 3.08V ±25mV (–40°C to +125°C); ensures deterministic reset release point across industrial temperature range |
| Reset Timeout Period | 100ms min (tRP); guarantees sufficient hold time for µP initialization before release |
| Supply Voltage Range | +1.0V to +5.5V; supports operation during deep brownout and enables use with 1.2V–5V system rails |
| RESET Output Type | Active-low push-pull; eliminates need for external pull-up resistor and ensures fast, rail-to-rail logic levels |
| PFI Comparator Threshold | +1.25V ±100mV; enables accurate power-fail or low-battery detection when monitoring auxiliary supplies |
| MR Input Compatibility | CMOS logic (VIH = 0.7×VCC, VIL = 0.3×VCC); allows direct connection to pushbutton or GPIO without level-shifting |
| Quiescent Current | 1.2µA typical at VCC = 3V; minimizes battery drain in always-on supervision applications |
Pinout & Package
MAX6342TUT+T is housed in a lead-free 6-pin SOT23-6 package (JEDEC MO-178AA), footprint-compatible with industry-standard SOT-23 layouts and suitable for high-density PCB designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Positive supply input | Accepts +1.0V to +5.5V; powers internal comparators, reset generator, and output driver |
| 2 - GND | Ground reference | System ground return path; must be low-impedance for stable threshold accuracy |
| 3 - PFI | Power-fail input | Monitors auxiliary voltage via resistor divider; asserts PFO low when input falls below +1.25V |
| 4 - PFO | Power-fail output | Open-drain active-low signal; used for early-warning interrupt or secondary reset triggering |
| 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; asserts low for ≥100ms after VCC rise or MR release; valid to VCC = +1V |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-set reset threshold | 3.08V trimmed at wafer level with ±25mV max deviation over –40°C to +125°C, eliminating external resistor calibration |
| Guaranteed RESET validity to VCC = +1V | Ensures clean, logic-valid reset signal even during severe brownout-critical for fail-safe µP recovery |
| Dedicated power-fail comparator | +1.25V reference with independent PFI/PFO pins enables dual-supply monitoring without additional ICs |
| Debounced manual-reset input | 1µs internal glitch rejection on MR pin allows direct pushbutton connection without RC filtering or firmware debounce |
| Low quiescent current | 1.2µA typical at 3V enables multi-year battery life in portable equipment with continuous supervision |
Applications
| Portable/Battery-Powered Equipment | Telecom Equipment |
|---|---|
|
Use Scenario: Supervising main 3.3V rail and backup coin-cell supply in handheld test instruments with sleep/wake cycles. IC Role / Device Role / Timing Role: Primary µP reset supervisor with power-fail warning for orderly shutdown before battery depletion. Use Value: 3.08V threshold matches nominal 3.3V LDO dropout; 1.2µA ICC extends battery runtime; PFO triggers firmware save before VCC collapse. |
Use Scenario: Monitoring 5V and 3.3V rails in VoIP gateway power subsystem with hot-swap capability. IC Role / Device Role / Timing Role: Dual-rail supervisor providing synchronized reset and early power-fail alert to FPGA and PHY controllers. Use Value: Independent PFI input enables monitoring of secondary 5V rail while RESET controls primary 3.3V domain; 100ms tRP meets PCIe reset timing requirements. |
| Multivoltage Systems | Embedded Control Systems |
|
Use Scenario: Coordinating startup sequencing between 1.8V core, 3.3V I/O, and 5V analog rails in industrial PLC CPU module. IC Role / Device Role / Timing Role: Centralized reset arbiter using MR input to gate system-wide reset until all rails stabilize. Use Value: Factory-trimmed 3.08V threshold ensures precise release point for 3.3V rail; MR synchronization prevents race conditions during cold start. |
Use Scenario: Providing watchdog-independent power-on reset and brownout protection in automotive body-control module with CAN interface. IC Role / Device Role / Timing Role: Fail-safe reset source that remains functional down to VCC = +1V, independent of microcontroller health. Use Value: Guaranteed RESET validity to +1V prevents undefined µP state during cranking transients; -40°C to +125°C rating supports under-hood deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6343TUT+T | Same 3.08V threshold and package, but features open-drain RESET output instead of push-pull | Requires external pull-up resistor; suited for wired-OR reset buses or mixed-voltage systems where RESET must interface to multiple supply domains | Select when system-level reset bus architecture mandates open-drain topology or level translation |
| TLV809K31DBVR | 3.08V threshold, SOT23-3 package, no PFI/PFO or MR; only VCC monitoring and active-low reset | Lacks power-fail warning and manual reset functionality; lower pin count but no auxiliary monitoring capability | Choose when only basic VCC supervision is required and board space is constrained; not suitable for dual-supply or button-triggered reset needs |
Compared with MAX6342TUT+T, MAX6343TUT+T trades push-pull drive for open-drain flexibility at the cost of added BOM components, while TLV809K31DBVR reduces size and cost by omitting PFI, PFO, and MR-making it viable only for single-rail, no-button applications.
Availability
MAX6342TUT+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 lead-free compliance.
Supply support for MAX6342TUT+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 solutions for industrial, communications, and consumer applications.
The MAX6342–MAX6345 family was designed specifically for robust, low-power microprocessor supervision in harsh environments-emphasizing precision threshold stability, wide VCC operating range, and integrated power-fail warning for mission-critical systems.
FAQ
What is the exact reset threshold voltage of the MAX6342TUT+T?
The MAX6342TUT+T has a factory-trimmed VCC reset threshold of 3.08V, 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 of the official datasheet. The "T" suffix in MAX6342TUT+T explicitly denotes the 3.08V variant per Maxim's Selector Guide 2.
Does the MAX6342TUT+T provide power-fail detection capability?
Yes, the MAX6342TUT+T includes a dedicated power-fail comparator with a +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. This enables early-warning detection for power failure, low-battery conditions, or secondary supply monitoring-functionality confirmed in the Functional Diagram and Applications Information sections of the datasheet.
Can the MAX6342TUT+T operate reliably during deep brownout conditions?
Yes, the MAX6342TUT+T is guaranteed to assert a valid logic-level RESET signal down to VCC = +1.0V, as stated in both the Absolute Maximum Ratings and Electrical Characteristics tables. This ensures deterministic reset behavior even during severe supply sags, making it suitable for automotive cranking or battery-depleted scenarios where other supervisors may fail to maintain output integrity.
What is the function of the MR pin on the MAX6342TUT+T?
The MR (Manual-Reset) pin on the MAX6342TUT+T is an active-low, CMOS-compatible input that forces a reset when pulled low. It features internal 1µs glitch rejection and debouncing, allowing direct connection to a pushbutton switch without external RC filtering. When MR is low, RESET remains asserted; upon MR release, RESET stays low for the full 100ms timeout period, ensuring µP reset completion.
Is the MAX6342TUT+T pin-compatible with other members of the MAX6342–MAX6345 family?
Yes, all MAX6342–MAX6345 variants-including MAX6342TUT+T-are packaged in identical 6-pin SOT23-6 housings with identical pinouts (VCC, GND, PFI, PFO, MR, RESET). However, functional differences exist: MAX6342TUT+T provides active-low push-pull RESET and MR, whereas MAX6343TUT+T substitutes open-drain RESET, and MAX6344TUT+T offers active-high push-pull RESET. Pin compatibility enables layout reuse, but logic polarity and drive strength must be verified per design.
MAX6342TUT+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:
- 3.08V
- 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
MAX6342TUT+T FAQ
1.How can I place an order for MAX6342TUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6342TUT+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 MAX6342TUT+T reliable?
The price and inventory of MAX6342TUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6342TUT+T is usually 5 days.
3.What payment methods are accepted for MAX6342TUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6342TUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6342TUT+T?
MAX6342TUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6342TUT+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 MAX6342TUT+T?
For technical support, including MAX6342TUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6342TUT+T requirements.
6.How does Aetrix verify that MAX6342TUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6342TUT+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 MAX6342TUT+T meets industry standards.
7.What is the process for return or replacement of MAX6342TUT+T?
All MAX6342TUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6342TUT+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 MAX6342TUT+T part is unused and in its original packaging.
Return procedure for MAX6342TUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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