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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:5,935
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Product details
Overview
MAX6343RUT+T from Maxim Integrated is a precision microprocessor supervisory circuit in SOT23-6 package, providing active-low open-drain reset output, factory-trimmed 2.63V VCC reset threshold, +1.25V power-fail comparator input, and guaranteed RESET validity down to VCC = +1V. It monitors supply integrity during power-up, brownout, and low-battery conditions in portable and multivoltage systems.
For engineers reviewing the MAX6343RUT+T datasheet, MAX6343RUT+T pinout, MAX6343RUT+T application, or MAX6343RUT+T equivalent, this device delivers deterministic reset timing, debounced manual reset, power-fail warning capability, and industrial temperature operation (–40°C to +125°C) for reliable embedded system supervision.
Technical Context
The MAX6343RUT+T integrates a precision voltage detector with 2.63V ±1.5% factory-trimmed threshold, a dedicated +1.25V reference-based power-fail comparator (PFI/PFO), and an MR input with 1µs glitch rejection. Its open-drain RESET output requires an external pull-up and sinks ≥3.2mA at VCC > 4.5V.
It operates across full VCC range of +1.0V to +5.5V with supply current as low as 1.2µA at VCC = 1V and TA = +25°C. Reset timeout is guaranteed 100ms min (180ms typical), and it remains functional through VCC = +1V - enabling robust supervision even during deep undervoltage events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.63V ±1.5% - factory-trimmed for accurate power-on reset at nominal 2.63V supply level |
| Reset Timeout Period | 100ms min - ensures µP remains held in reset long enough for stable clock and supply settling |
| Supply Voltage Range | +1.0V to +5.5V - supports supervision from ultra-low-voltage logic rails up to 5V systems |
| PFO Input Threshold | +1.25V - enables precise power-fail or low-battery detection via external resistor divider |
| RESET Output Type | Active-low open-drain - allows wired-OR configuration and interface with multiple supply domains |
| Operating Temperature | –40°C to +125°C - qualified for automotive under-hood, industrial, and extended-range embedded use |
| Supply Current (Typ) | 1.2µA at VCC = 1V - ultra-low quiescent current preserves battery life in portable equipment |
Pinout & Package
Package: 6-pin SOT23-6, surface-mount, lead-free (RoHS-compliant), top-mark "AACZ" per Maxim SOT Top Marks table.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Positive supply input | Accepts +1.0V to +5.5V; powers internal comparators and logic; RESET assertion valid down to VCC = +1V |
| 2 - GND | Ground reference | System ground return for all internal circuitry and comparator references |
| 3 - PFI | Power-fail input | Monitors external voltage via resistor divider; asserts PFO when voltage falls below +1.25V |
| 4 - PFO | Power-fail output | Active-low open-drain output signaling early power degradation or low-battery condition |
| 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; sinks ≥3.2mA at VCC > 4.5V |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 2.63V ±1.5% - eliminates need for external resistor trimming or calibration in production |
| Power-fail comparator | +1.25V reference with PFI/PFO pair - enables independent early-warning shutdown before main reset triggers |
| Guaranteed operation to VCC = +1V | RESET remains valid logic-low down to 1V supply - ensures fail-safe behavior during deep brownout |
| Debounced manual reset | 1µs minimum MR pulse width immunity - prevents false resets from switch bounce without external RC |
| Industrial temperature range | –40°C to +125°C operation - supports deployment in harsh environments without derating |
Applications
| Portable/Battery-Powered Equipment | Telecom Equipment |
|---|---|
|
Use Scenario: Battery-powered handheld terminal operating on single-cell Li-ion (2.7–4.2V) with real-time clock and flash memory. IC Role / Device Role / Timing Role: Supervises VCC rail and provides low-battery warning via PFI monitoring; asserts RESET during brownout to prevent flash corruption. Use Value: Prevents data loss by holding µP in reset until VCC exceeds 2.63V and ensuring orderly shutdown when battery drops below safe threshold. |
Use Scenario: Line card in carrier-grade access switch with dual 3.3V/1.2V supplies and hot-swap capability. IC Role / Device Role / Timing Role: Monitors primary 3.3V rail with MAX6343RUT+T; uses PFO to trigger interrupt-driven graceful service handoff prior to power collapse. Use Value: Enables predictive fault response - PFO alerts µP 10–100ms before VCC dropout, allowing state save and link deactivation. |
| Multivoltage Systems | Embedded Control Systems |
|
Use Scenario: Industrial PLC with mixed 5V analog, 3.3V I/O, and 1.8V FPGA core supplies. IC Role / Device Role / Timing Role: Supervises 3.3V domain; PFI connected to 5V rail via divider to detect upstream regulator failure before 3.3V collapses. Use Value: Provides cross-rail dependency monitoring - PFO-to-MR feedback creates cascaded reset chain ensuring coordinated power sequencing. |
Use Scenario: Automotive body control module (BCM) requiring ASIL-B–compatible supervision of MCU supply. IC Role / Device Role / Timing Role: Provides certified reset assertion with 100ms min timeout and –40°C to +125°C operation for ECU cold-cranking and thermal stress resilience. Use Value: Meets automotive startup reliability requirements - guaranteed reset hold time and wide-temp performance reduce field failure risk. |
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 instead of open-drain; includes MR input | Eliminates need for external pull-up; not suitable for wired-OR or multi-supply reset bus sharing | Select when direct drive of µP reset pin is required and no shared reset line exists |
| MAX6345RUT+T | Dual reset outputs: active-high push-pull RESET and active-low push-pull RESET; no MR input | Provides complementary reset signals for complex logic or FPGA configuration; lacks manual reset capability | Select when both high- and low-active reset assertions are needed simultaneously without MR control |
Compared with MAX6342RUT+T and MAX6345RUT+T, the MAX6343RUT+T uniquely balances flexibility and simplicity: its open-drain RESET supports shared reset buses and mixed-voltage interfacing, while retaining MR for field-service recovery - making it optimal for portable and telecom systems requiring adaptable supervision.
Availability
MAX6343RUT+T is available at Aetrix Electronics and suitable for portable computers, telecom equipment, networking gear, and battery-powered instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
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, 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 space-constrained, multivoltage, and battery-sensitive systems - delivering factory-trimmed accuracy, ultra-low power, and integrated power-fail warning in minimal SOT23-6 footprint.
FAQ
What is the exact reset threshold voltage for MAX6343RUT+T?
The MAX6343RUT+T has a factory-trimmed VCC reset threshold of 2.63V with ±1.5% tolerance over –40°C to +125°C. This value is laser-trimmed during production and confirmed in the Electrical Characteristics table of the official datasheet. The "R" suffix in MAX6343RUT+T explicitly denotes the 2.63V variant, and the threshold remains stable across temperature and supply voltage variations within specification.
Does MAX6343RUT+T support operation below 2.7V supply?
Yes, MAX6343RUT+T operates across +1.0V to +5.5V supply range. Its reset output is guaranteed valid down to VCC = +1V, and the internal +1.25V reference remains functional throughout this range. This enables reliable supervision of sub-2.7V logic rails such as 1.8V or 1.2V domains when used with appropriate external resistor dividers on PFI.
How is the PFO output used in practice with MAX6343RUT+T?
The PFO output of MAX6343RUT+T is an active-low open-drain signal triggered when the voltage at PFI falls below +1.25V. In practice, PFI connects to a resistor divider from a monitored supply (e.g., 5V rail), so PFO asserts before VCC drops below 2.63V - enabling early warning for µP-initiated shutdown. PFO can also be tied to MR to create cascaded reset behavior.
What external components are required for MAX6343RUT+T to function correctly?
MAX6343RUT+T requires only a pull-up resistor on the RESET pin (typically 10kΩ to VCC or another compatible supply) due to its open-drain output. If MR is used, a pushbutton to GND with optional debounce capacitor is sufficient. No external capacitors are needed for reset timing - the 100ms timeout is internal and factory-guaranteed.
Is MAX6343RUT+T pin-compatible with other members of the MAX6342–MAX6345 family?
Yes, all MAX6342–MAX6345 variants, including MAX6343RUT+T, share identical 6-pin SOT23-6 pinout and footprint. Pin functions are consistent across the family: VCC (1), GND (2), PFI (3), PFO (4), MR (5), and RESET (6). Functional differences (e.g., push-pull vs. open-drain RESET) do not affect PCB layout - only schematic connectivity and external pull-up selection differ.
MAX6343RUT+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:
- 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-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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