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Analog Devices Inc./Maxim Integrated MAX6343TUT+T
- Part No.:
- MAX6343TUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6343TUT+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,980
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Product details
Overview
MAX6343TUT+T from Maxim Integrated is an active-low, open-drain microprocessor supervisory circuit in a 6-pin SOT23 package, designed to monitor VCC supply voltage (1.0V–5.5V) and provide reliable reset assertion during power-up, brownout, or power-fail events. It features a factory-trimmed 3.08V reset threshold (T suffix), +1.25V precision PFI comparator for power-fail warning, and guaranteed RESET validity down to VCC = +1V. Used in portable/battery-powered systems requiring low-power, high-accuracy reset control.
For engineers reviewing the MAX6343TUT+T datasheet, MAX6343TUT+T pinout, MAX6343TUT+T application, or MAX6343TUT+T equivalent, key selection criteria include its open-drain reset output configuration, 3.08V VCC threshold tolerance (±2.5% over –40°C to +125°C), 100ms minimum reset timeout, and compatibility with multi-rail monitoring via PFI/PFO.
Technical Context
The MAX6343TUT+T implements a precision bandgap-based voltage reference and comparator architecture to detect VCC falling below 3.08V, triggering an active-low open-drain RESET output. Its PFI input connects to an internal +1.25V reference, enabling independent power-fail detection of secondary supplies or battery voltage.
Unlike push-pull variants, the open-drain RESET requires an external pull-up resistor (e.g., 10kΩ) to any supply ≤+5.5V, allowing level-shifting and wired-OR reset bus configurations. MR input provides debounced manual reset with 1µs glitch rejection and 0.1µs minimum pulse width.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 3.08V ±2.5% (–40°C to +125°C); ensures deterministic reset activation at nominal 3.3V system rail |
| Supply Voltage Range | +1.0V to +5.5V; supports operation down to ultra-low VCC while maintaining valid RESET logic levels |
| Reset Timeout Period | 100ms min (tRP); guarantees sufficient reset hold time for µP initialization across temperature |
| PFI Threshold | +1.25V ±100mV; enables accurate power-fail or low-battery warning independent of VCC reset path |
| RESET Output Type | Active-low, open-drain; allows flexible pull-up to different voltage domains and shared reset buses |
| Supply Current | 25µA typ at VCC = 3V, –40°C to +125°C; minimizes quiescent load in battery-critical applications |
| Operating Temperature | –40°C to +125°C; qualified for industrial and extended-temperature embedded environments |
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 input (1.0V–5.5V); powers internal reference, comparators, and logic |
| 2 - GND | Ground reference | System ground return for all internal circuits and I/O terminals |
| 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 output signaling early power degradation or battery depletion |
| 5 - MR | Manual-reset input | CMOS-compatible active-low input; debounced internally, forces reset when pulled low |
| 6 - RESET | Reset output | Active-low open-drain output; requires external pull-up; remains low ≥100ms after VCC rise or MR release |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 3.08V with ±2.5% max deviation over full temperature range - eliminates external resistor calibration |
| Open-drain RESET output | Supports level translation and wired-OR reset busing across mixed-voltage subsystems |
| +1.25V precision PFI reference | Enables accurate secondary supply or battery voltage monitoring without external reference IC |
| Guaranteed RESET validity to VCC = +1V | Ensures clean, logic-valid reset signal even during deep brownout conditions |
| Debounced MR input | 1µs internal glitch rejection and 0.1µs minimum pulse width - eliminates need for external RC debounce |
Applications
| Portable/Battery-Powered Equipment | Telecom Equipment |
|---|---|
|
Use Scenario: Handheld medical monitors powered by single-cell Li-ion batteries experiencing gradual discharge and transient load drops. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET when VCC falls below 3.08V and generating PFO warning at 1.25V-equivalent battery voltage. Use Value: Prevents firmware corruption during low-battery shutdown and enables graceful data save before power loss. |
Use Scenario: Line-card modules in carrier-grade routers with dual 3.3V/5V rails and strict power sequencing requirements. IC Role / Device Role / Timing Role: Monitors primary 3.3V rail with MAX6343TUT+T while using PFI to track auxiliary 5V bias supply via resistor divider. Use Value: Delivers independent reset and early-warning signals without adding discrete comparators or voltage references. |
| Multivoltage Systems | Embedded Control Systems |
|
Use Scenario: Industrial PLC I/O modules with isolated 24V, 5V, and 3.3V domains requiring coordinated reset timing. IC Role / Device Role / Timing Role: MAX6343TUT+T provides open-drain RESET pulled up to 5V domain, while PFO feeds interrupt to µP monitoring 24V field power. Use Value: Enables cross-domain reset coordination and predictive maintenance alerts via single 6-pin IC. |
Use Scenario: Automotive body-control modules operating in under-hood environments with wide thermal swings and noisy power rails. IC Role / Device Role / Timing Role: Resets microcontroller during cold-crank brownouts (VCC dips to 2.2V) and detects alternator failure via PFI monitoring 12V line. Use Value: Meets AEC-Q100 Grade 1 thermal requirements (–40°C to +125°C) and rejects short VCC glitches ≤12µs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6342TUT+T | Active-low push-pull RESET output; no external pull-up required; same 3.08V threshold and PFI/PFO functionality | Better suited for single-rail systems where RESET must drive directly into µP without level translation | Select when board layout lacks space for pull-up resistor or µP reset pin is not tolerant of open-drain leakage |
| TLV803EB30DBZR | 3.0V reset threshold, SOT23-5 package, no PFI/PFO; lower quiescent current (0.5µA), but no secondary supply monitoring | Applicable only where basic reset supervision suffices and power-fail warning is unnecessary | Choose for cost-sensitive, space-constrained designs needing minimal functionality and ultra-low IQ |
Compared with MAX6342TUT+T, the MAX6343TUT+T trades push-pull drive for open-drain flexibility and bus-sharing capability; compared with TLV803EB30DBZR, it adds critical PFI/PFO functionality for predictive power management at modest IQ penalty.
Availability
MAX6343TUT+T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, telecom equipment, and multivoltage systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6343TUT+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 industrial, automotive, communications, and computing applications.
The MAX6342–MAX6345 family delivers highly integrated, factory-trimmed supervisory circuits targeting space-constrained, high-reliability digital systems needing accurate reset and power-fail detection in one 6-pin SOT23 device.
FAQ
What is the exact reset threshold voltage of the MAX6343TUT+T?
The MAX6343TUT+T has a factory-trimmed nominal reset threshold of 3.08V, with a maximum tolerance of ±2.5% over the full operating temperature range (–40°C to +125°C). This value is confirmed in the Electrical Characteristics table of the official Maxim datasheet (19-1568 Rev 2), and applies specifically to the "T" suffix variant within the MAX6342–MAX6345 family. The MAX6343TUT+T maintains this accuracy without external calibration components.
Does the MAX6343TUT+T support operation down to 1.0V VCC?
Yes, the MAX6343TUT+T is fully specified to operate with VCC as low as +1.0V, and its RESET output remains valid (logically asserted) across this entire range. The datasheet guarantees RESET functionality down to VCC = +1V, enabling robust brownout protection in ultra-low-power or energy-harvesting systems where supply voltage may dip significantly before shutdown.
How does the PFI/PFO function work in the MAX6343TUT+T?
The MAX6343TUT+T uses an internal +1.25V reference connected to the inverting input of a comparator. When the voltage applied to the PFI pin falls below +1.25V (±100mV), the PFO output goes low. This allows monitoring of secondary supplies or battery voltage via an external resistor divider - for example, detecting Li-ion battery voltage drop below 3.0V. PFO operates independently of the VCC reset path and is active-low, open-drain.
What external components are required for the MAX6343TUT+T RESET output?
The MAX6343TUT+T RESET output is active-low and open-drain, so it requires an external pull-up resistor to a valid logic-high voltage (≤+5.5V). A 10kΩ resistor is recommended for most applications, selected to ensure logic-low sinking (≤0.4V at 100µA) and logic-high sourcing (≥0.8×VPULLUP) while accommodating connected loads. No other passive components are required for basic reset functionality.
Is the MAX6343TUT+T compatible with –40°C to +125°C industrial temperature requirements?
Yes, the MAX6343TUT+T is fully rated and tested for continuous operation across –40°C to +125°C ambient temperature. This specification is explicitly stated in the Ordering Information table and validated across all electrical parameters in the datasheet's Electrical Characteristics section. It meets industrial and extended-temperature embedded requirements without derating.
MAX6343TUT+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:
- 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
MAX6343TUT+T FAQ
1.How can I place an order for MAX6343TUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6343TUT+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 MAX6343TUT+T reliable?
The price and inventory of MAX6343TUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6343TUT+T is usually 5 days.
3.What payment methods are accepted for MAX6343TUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6343TUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6343TUT+T?
MAX6343TUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6343TUT+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 MAX6343TUT+T?
For technical support, including MAX6343TUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6343TUT+T requirements.
6.How does Aetrix verify that MAX6343TUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6343TUT+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 MAX6343TUT+T meets industry standards.
7.What is the process for return or replacement of MAX6343TUT+T?
All MAX6343TUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6343TUT+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 MAX6343TUT+T part is unused and in its original packaging.
Return procedure for MAX6343TUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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