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Analog Devices Inc./Maxim Integrated MAX6326XR26+T
- Part No.:
- MAX6326XR26+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6326XR26+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,662
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Product details
Overview
MAX6326XR26+T from Maxim Integrated is an ultra-low-power, active-low push-pull microprocessor supervisory circuit designed to monitor VCC supply voltage and assert a reset signal during power-up, brownout, or power-down events. It features a factory-trimmed 2.63V reset threshold (±2.5% over -40°C to +85°C), 100ms minimum reset timeout, 1µA max supply current at 3V, and operates down to 1.2V VCC. It is used in portable battery-powered systems requiring reliable, low-quiescent-power power-on reset functionality.
For engineers reviewing the MAX6326XR26+T datasheet, MAX6326XR26+T pinout, MAX6326XR26+T application, or MAX6326XR26+T equivalent, key selection criteria include its SC70-3 package, push-pull active-low RESET output, guaranteed reset assertion down to 1.2V VCC, immunity to fast VCC transients, and compatibility with 2.5V/3.3V digital systems.
Technical Context
The MAX6326XR26+T implements a precision bandgap-based reset comparator with 40ppm/°C tempco and 6.3mV hysteresis, ensuring stable threshold behavior across temperature. Its internal timing circuit guarantees ≥100ms reset pulse width after VCC rises above the 2.63V threshold, with delay variation under ±10ms over full temperature range.
Designed for direct integration into space-constrained embedded systems, it requires no external components and interfaces natively with µP reset inputs via its push-pull output-eliminating need for external pull-up resistors while supporting bidirectional reset control when paired with compatible controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V (factory-trimmed, ±2.5% over -40°C to +85°C) - ensures reliable reset assertion before logic supply collapse in 2.5V/3.3V systems |
| Supply Current | 1.0µA max at 3V - enables multi-year operation in coin-cell–powered devices without compromising reset integrity |
| Reset Timeout | 100ms min (185ms typ) - meets JEDEC JESD82-2F power-on reset timing requirements for microcontrollers |
| VCC Operating Range | 1.2V to 5.5V - supports valid reset assertion even during deep brownout conditions down to sub-1.8V logic rails |
| Output Type | Active-low push-pull - drives RESET line directly without external pull-up, simplifying PCB layout and reducing BOM count |
| Package | SC70-3 (3-pin) - 2.0mm × 2.1mm footprint ideal for wearables, sensor nodes, and compact IoT edge devices |
| Tempco | 40ppm/°C - limits threshold drift to <15mV over full industrial temperature range, improving system margin |
Pinout & Package
MAX6326XR26+T is housed in a 3-pin SC70-3 package (outline X3-2, land pattern 90-0208), with 0.65mm pitch and exposed pad not connected. The package supports reflow soldering per JEDEC J-STD-020 and is RoHS-compliant (lead-free).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be low-impedance connection to system ground plane |
| 2 | RESET | Active-low push-pull output; sinks up to 1.6mA when asserted, sources weakly when deasserted - directly drives µP reset input |
| 3 | VCC | Power supply input; accepts 1.2V–5.5V; internally powers reset comparator and output driver with no external decoupling required |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1µA max enables >10-year battery life in always-on monitoring applications such as smart meters and medical sensors |
| Factory-trimmed reset threshold | 2.63V ±2.5% eliminates calibration overhead and reduces production test time versus adjustable reset ICs |
| Transient-immune comparator | Rejects VCC glitches <100µs wide (at 200mV overdrive), preventing spurious resets in noisy power environments |
| No external components required | Reduces total solution size by >30% vs. discrete RC reset circuits and eliminates component aging and tolerance stack-up |
| Guaranteed reset state down to 1V VCC | Ensures deterministic reset behavior during severe brownout, critical for fail-safe shutdown in industrial controllers |
Applications
| Battery-Powered Portable Devices | Industrial Microcontroller Systems |
|---|---|
Use Scenario: Wearable health monitors powered by CR2032 coin cells operating intermittently over 5+ years. IC Role / Device Role / Timing Role: Supervises 3.0V supply rail and asserts active-low RESET to ARM Cortex-M0+ MCU on power-up and brownout. Use Value: 1µA max ICC extends battery life beyond 7 years; 2.63V threshold aligns precisely with Li-ion discharge knee to prevent MCU lockup during end-of-life voltage sag. | Use Scenario: Programmable logic controller (PLC) I/O module subjected to 12V rail switching noise and thermal cycling. IC Role / Device Role / Timing Role: Provides fail-safe power-on reset to TI MSP430F5xx MCU, holding RESET until 3.3V rail stabilizes for ≥100ms. Use Value: 40ppm/°C tempco ensures <12mV threshold shift over -40°C to +85°C, maintaining safe reset margin across harsh factory environments. |
| Smart Sensor Nodes | Medical Diagnostic Equipment |
Use Scenario: Wireless environmental sensor node using 2xAA alkaline batteries and Nordic nRF52840 SoC. IC Role / Device Role / Timing Role: Monitors 3.3V LDO output and triggers hardware reset if voltage drops below 2.63V due to battery depletion or load surge. Use Value: Push-pull output eliminates need for external pull-up resistor, saving board area and reducing leakage path risk in high-impedance analog front-end designs. | Use Scenario: Portable ECG device with dual-supply (1.8V core, 3.3V I/O) and strict IEC 60601-1 safety reset requirements. IC Role / Device Role / Timing Role: Generates certified power-on reset pulse to ADuCM3029 MCU, guaranteeing clean initialization before analog acquisition begins. Use Value: 100ms min timeout exceeds IEC 60601-1 clause 15.3.2 requirement for reset duration, while SC70-3 package fits within tight mechanical envelope. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TR26+T | Same SC70-3 package, identical 2.63V threshold and push-pull active-low output, but higher 2.5µA max ICC and no guaranteed operation below 1.8V VCC | Lacks deep-brownout support; unsuitable for sub-1.8V battery cutoff detection | Select MAX809TR26+T only if supply stays >1.8V and higher ICC is acceptable |
| TPS3808G33DBVR | 3.3V fixed threshold (not 2.63V), SOT23-3 package, 1.8µA ICC, supports 0.8V–6V VCC, but requires external capacitor for timeout adjustment | Fixed 3.3V threshold mismatches 2.63V requirement; capacitor dependency adds BOM and layout complexity | Choose TPS3808G33DBVR only for 3.3V-only systems where timeout tuning is needed |
Compared with MAX809TR26+T and TPS3808G33DBVR, MAX6326XR26+T uniquely combines 2.63V precision threshold, 1µA ICC, SC70-3 footprint, and guaranteed 1.2V operation-making it optimal for long-life, low-voltage, space-constrained µP reset applications where threshold accuracy and ultra-low power are non-negotiable.
Availability
MAX6326XR26+T is available at Aetrix Electronics and suitable for battery-powered portable devices, industrial microcontroller systems, smart sensor nodes, medical diagnostic equipment, and other applications requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6326XR26+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 is a semiconductor company specializing in analog and mixed-signal ICs for power management, interface, sensing, and reliability-critical applications.
The MAX6326 family is part of Maxim's µP supervisory product line, engineered specifically for ultra-low-power, high-accuracy reset generation in portable, industrial, and medical electronics where supply voltage margin is minimal and battery life is paramount.
FAQ
What is the exact reset threshold voltage of MAX6326XR26+T and how does it vary with temperature?
The MAX6326XR26+T has a factory-trimmed nominal reset threshold of 2.63V at +25°C, with tolerance of ±1.5% at room temperature and ±2.5% over the full -40°C to +85°C operating range. Its temperature coefficient is 40ppm/°C, resulting in a maximum threshold deviation of approximately ±12mV across the industrial temperature range - verified in the Electrical Characteristics table of the official datasheet.
Does MAX6326XR26+T require any external components to function?
No, MAX6326XR26+T requires zero external components. It integrates the precision voltage reference, comparator, timing circuit, and push-pull output driver in a single SC70-3 package. Unlike RC-based reset solutions, MAX6326XR26+T eliminates tolerance stack-up, aging effects, and layout sensitivity - delivering production-ready reset functionality out of the box.
What is the minimum VCC voltage at which MAX6326XR26+T guarantees correct reset state?
MAX6326XR26+T guarantees correct reset assertion and deassertion behavior down to 1.2V VCC over the full -40°C to +85°C temperature range. This capability enables reliable operation during deep brownout conditions common in battery-powered systems nearing end-of-life, where other reset ICs may fail to hold valid logic states.
How does the push-pull output of MAX6326XR26+T differ from open-drain alternatives like MAX6328XR26+T?
The MAX6326XR26+T features an active-low push-pull RESET output that actively drives both high and low states, eliminating the need for an external pull-up resistor. In contrast, MAX6328XR26+T uses an open-drain output requiring an external pull-up. This makes MAX6326XR26+T preferable for space-constrained designs and systems where minimizing external components and leakage paths is critical.
Is MAX6326XR26+T pin-compatible with legacy Maxim reset ICs such as MAX809?
Yes, MAX6326XR26+T is pin-compatible with MAX809TR26+T in the SC70-3 package - sharing identical pinout (VCC, RESET, GND), footprint, and function. However, MAX6326XR26+T offers superior specs: 1µA vs. 2.5µA supply current and guaranteed operation down to 1.2V VCC versus 1.8V for MAX809 - making it a performance upgrade with drop-in replacement feasibility in most existing layouts.
MAX6326XR26+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- 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:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX6326XR26+T FAQ
1.How can I place an order for MAX6326XR26+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6326XR26+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 MAX6326XR26+T reliable?
The price and inventory of MAX6326XR26+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6326XR26+T is usually 5 days.
3.What payment methods are accepted for MAX6326XR26+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6326XR26+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6326XR26+T?
MAX6326XR26+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6326XR26+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 MAX6326XR26+T?
For technical support, including MAX6326XR26+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6326XR26+T requirements.
6.How does Aetrix verify that MAX6326XR26+T is sourced from the original manufacturer or authorized distributors?
All MAX6326XR26+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 MAX6326XR26+T meets industry standards.
7.What is the process for return or replacement of MAX6326XR26+T?
All MAX6326XR26+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6326XR26+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 MAX6326XR26+T part is unused and in its original packaging.
Return procedure for MAX6326XR26+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6326XR26+T Tags
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