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Analog Devices Inc./Maxim Integrated MAX6343RUT-T
- Part No.:
- MAX6343RUT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6343RUT-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6343RUT-T from Maxim Integrated is a precision microprocessor supervisory circuit with active-low open-drain reset output, factory-trimmed 2.63V VCC reset threshold, +1.25V power-fail comparator input (PFI), and guaranteed RESET validity down to VCC = +1V. It operates across -40°C to +125°C in portable/battery-powered systems requiring reliable brownout detection and orderly shutdown signaling.
For engineers reviewing the MAX6343RUT-T datasheet, MAX6343RUT-T pinout, MAX6343RUT-T application, or MAX6343RUT-T equivalent, key selection criteria include its open-drain reset configuration, 100ms minimum reset timeout, PFI-based low-battery warning capability, and SOT23-6 package compatibility with space-constrained embedded control designs.
Technical Context
The MAX6343RUT-T integrates a precision voltage detector for VCC monitoring and a separate +1.25V reference-based comparator for PFI, enabling independent power-fail warning generation. Its reset assertion logic responds to both VCC crossing the 2.63V threshold and debounced manual-reset (MR) input transitions.
Unlike push-pull variants, the open-drain RESET output requires an external pull-up resistor-supporting level-shifting across supply domains up to +5.5V-and guarantees sink capability of 3.2mA at VCC > 4.5V with VOL ≤ 0.4V. MR input is CMOS-compatible with 0.3×VCC/0.7×VCC thresholds and 1µs glitch rejection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.63V ±25mV (factory-trimmed; ensures precise brownout detection at nominal system supply) |
| RESET Output Type | Active-low open-drain (enables wired-OR reset buses and multi-supply level translation via external pull-up) |
| Reset Timeout Period | 100ms min (guaranteed reset pulse width after VCC rise or MR release; prevents premature µP boot) |
| PFI Input Threshold | +1.25V ±100mV (stable reference for external voltage divider; supports low-battery or secondary supply monitoring) |
| Supply Voltage Range | +1.0V to +5.5V (ensures valid reset assertion even during deep brownout conditions) |
| Operating Temperature | -40°C to +125°C (qualified for automotive under-hood and industrial embedded environments) |
| Supply Current | 1.2µA typical at VCC = 3V (ultra-low quiescent current extends battery life in portable equipment) |
Pinout & Package
Package: 6-pin SOT23-6 (1.6mm × 2.9mm × 1.1mm body; JEDEC MO-178AA compliant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Positive supply input | Primary power rail input; powers internal comparators and logic; supports 1.0V–5.5V operation |
| 2 - GND | Ground reference | Analog and digital ground return; must be low-impedance path for accurate threshold sensing |
| 3 - PFI | Power-fail monitor input | Connects to voltage divider; asserts PFO when voltage falls below +1.25V (e.g., battery sag or regulator dropout) |
| 4 - PFO | Power-fail output | Active-low open-drain signal; used to trigger µP interrupt or initiate controlled shutdown before main supply collapse |
| 5 - MR | Manual-reset input | CMOS-compatible active-low input; debounced internally; forces reset when pulled low (e.g., pushbutton interface) |
| 6 - RESET | Active-low open-drain reset output | Sinks current when asserted; requires external pull-up; compatible with 3.3V/5V I/O domains and shared reset buses |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-set reset threshold | 2.63V with ±25mV tolerance over full temperature range ensures consistent brownout response without calibration |
| Guaranteed RESET validity to VCC = +1V | Enables robust reset assertion during deep undervoltage events where other supervisors fail silently |
| Independent +1.25V PFI comparator | Allows early-warning detection of secondary supply failure or battery depletion without affecting reset timing |
| Debounced MR input with 1µs glitch rejection | Eliminates need for external RC filtering; supports direct pushbutton connection in noisy industrial environments |
| Ultra-low 1.2µA supply current | Minimizes standby power draw in always-on battery-backed systems such as smart meters and IoT edge nodes |
Applications
| Portable/Battery-Powered Equipment | Telecom Equipment |
|---|---|
|
Use Scenario: Battery voltage monitoring in handheld test instruments with dual-supply µP and analog front-end. IC Role / Device Role / Timing Role: Supervisory IC providing brownout reset and low-battery warning via PFI/PFO. Use Value: Prevents data corruption during battery sag by asserting RESET before VCC drops below µP minimum operating voltage. |
Use Scenario: Line-card power sequencing in modular telecom chassis with hot-swap capability. IC Role / Device Role / Timing Role: Power-fail detector triggering graceful firmware shutdown prior to 12V backplane collapse. Use Value: Enables deterministic state save and register preservation using PFO interrupt before main supply interruption. |
| Multivoltage Systems | Embedded Control Systems |
|
Use Scenario: Monitoring 3.3V I/O rail while µP runs on 1.8V core supply in FPGA-based motor controller. IC Role / Device Role / Timing Role: Independent voltage supervisor interfacing 3.3V domain to 1.8V µP reset input via open-drain RESET. Use Value: Open-drain output allows safe level translation without voltage translators; PFI monitors I/O rail independently. |
Use Scenario: Industrial PLC module requiring fail-safe reset during AC line sags or DC bus ripple. IC Role / Device Role / Timing Role: Primary reset generator with MR support for field-service reset and brownout immunity. Use Value: 100ms reset timeout and -40°C to +125°C rating ensure reliable operation in uncontrolled cabinet environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6342RUT-T | Active-low push-pull RESET output (no external pull-up required); identical VCC threshold and PFI/PFO functionality | Better suited for single-rail systems where RESET must drive µP directly without level translation | Select MAX6342RUT-T when board layout lacks space for pull-up resistor or when driving high-capacitance reset lines |
| TLV803EB26DBZR | 2.63V reset threshold, SOT23-5 package, no PFI/PFO functionality, 35µA supply current | Lacks power-fail warning capability; suitable only for basic reset supervision without secondary monitoring | Choose TLV803EB26DBZR only if PFI/PFO is unnecessary and ultra-low cost is prioritized over feature set |
Compared with MAX6342RUT-T, the MAX6343RUT-T trades push-pull drive for open-drain flexibility and multi-supply compatibility; compared with TLV803EB26DBZR, it adds critical PFI-based early-warning capability and cuts supply current by >96%, making it superior for battery-critical and multivoltage applications.
Availability
MAX6343RUT-T is available at Aetrix Electronics and suitable for portable computers, telecom equipment, networking equipment, portable/battery-powered equipment, and multivoltage systems requiring stable component supply across extended temperature ranges.
Supply support for MAX6343RUT-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, sensing, and connectivity applications in industrial, automotive, and communications markets.
The MAX6342–MAX6345 family delivers highly integrated, temperature-stable supervisory functions-including dual-threshold monitoring and power-fail warning-for compact, reliable embedded systems where supply integrity is mission-critical.
FAQ
What is the exact reset threshold voltage of the MAX6343RUT-T?
The MAX6343RUT-T has a factory-trimmed VCC reset threshold of 2.63V, with a guaranteed tolerance 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 MAX6342–MAX6345 datasheet. The 'R' suffix in MAX6343RUT-T explicitly denotes the 2.63V variant.
Does the MAX6343RUT-T provide power-fail warning capability?
Yes, the MAX6343RUT-T includes a dedicated +1.25V precision reference-based power-fail comparator. The PFI pin accepts an external voltage (e.g., from a resistor divider), and when that voltage falls below +1.25V, the PFO pin asserts low-providing early warning of battery depletion or secondary supply collapse independent of the main reset function.
What is the required external pull-up resistor value for the MAX6343RUT-T's open-drain RESET output?
No single value is mandated, but a 10kΩ pull-up to the target logic supply (up to +5.5V) is sufficient in most applications. The MAX6343RUT-T guarantees RESET sink capability of 3.2mA at VCC > 4.5V with VOL ≤ 0.4V, so the resistor must be small enough to maintain logic-low levels under worst-case load yet large enough to avoid excessive current draw during assertion. Values between 4.7kΩ and 100kΩ are commonly used.
Can the MAX6343RUT-T operate reliably during deep brownout conditions?
Yes-the MAX6343RUT-T is guaranteed to assert a valid RESET signal down to VCC = +1.0V, unlike many supervisors that cease functioning below 2.0V. This ensures deterministic reset behavior even during severe undervoltage transients, supporting robust system recovery in battery-powered and unregulated supply applications.
Is the MAX6343RUT-T pin-compatible with other members of the MAX6342–MAX6345 family?
Yes, all MAX6342–MAX6345 devices share identical 6-pin SOT23-6 pinouts and footprint. The MAX6343RUT-T uses pins 1–6 for VCC, GND, PFI, PFO, MR, and RESET respectively-matching MAX6342RUT-T and MAX6344RUT-T. Functionally, only the RESET output type differs (open-drain vs. push-pull), requiring minor schematic updates for pull-up placement.
MAX6343RUT-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.63V
- 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-23-6
MAX6343RUT-T FAQ
1.How can I place an order for MAX6343RUT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6343RUT-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 MAX6343RUT-T reliable?
The price and inventory of MAX6343RUT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6343RUT-T is usually 5 days.
3.What payment methods are accepted for MAX6343RUT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6343RUT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6343RUT-T?
MAX6343RUT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6343RUT-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 MAX6343RUT-T?
For technical support, including MAX6343RUT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6343RUT-T requirements.
6.How does Aetrix verify that MAX6343RUT-T is sourced from the original manufacturer or authorized distributors?
All MAX6343RUT-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 MAX6343RUT-T meets industry standards.
7.What is the process for return or replacement of MAX6343RUT-T?
All MAX6343RUT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6343RUT-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 MAX6343RUT-T part is unused and in its original packaging.
Return procedure for MAX6343RUT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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