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Analog Devices Inc./Maxim Integrated MAX6326XR30
- Part No.:
- MAX6326XR30
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6326XR30.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,548
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Product details
Overview
MAX6326XR30 from Maxim Integrated is an ultra-low-power, active-low push-pull microprocessor supervisory circuit designed to monitor 3.0V power supplies and assert a reset signal during brownout or power-up/down events. It features a factory-trimmed 3.0V reset threshold (±1.5% at +25°C), 100ms minimum reset timeout, 1µA max supply current, and operation down to 1V VCC - ideal for battery-powered portable systems requiring reliable power-on reset.
For engineers reviewing the MAX6326XR30 datasheet, MAX6326XR30 pinout, MAX6326XR30 application, or MAX6326XR30 equivalent, this device delivers precision voltage monitoring with transient immunity, no external components, and compatibility with space-constrained SOT23-3 and SC70-3 PCB layouts in embedded controllers and intelligent instrumentation.
Technical Context
The MAX6326XR30 integrates a precision bandgap reference and comparator to detect VCC falling below its 3.0V threshold, holding RESET low for ≥100ms after VCC recovers. Its reset comparator ignores fast transients (up to 200µs at 100mV overdrive), ensuring glitch immunity in noisy environments.
Designed for single-function supervision, it operates across –40°C to +85°C with ±2.5% reset threshold tolerance over temperature and 40ppm/°C tempco - enabling stable reset assertion in automotive and industrial edge nodes without calibration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.0V ±1.5% (25°C); ensures reliable detection of 3.0V supply brownout before µP malfunction |
| Supply Current | 1µA max; enables multi-year battery life in portable/wireless sensors and wearables |
| Reset Timeout | 100ms min; guarantees sufficient hold time for full µP initialization and memory stabilization |
| Operating Voltage Range | 1.0V to 5.5V; supports supervision during deep brownout and full power-up sequencing |
| Output Type | Active-low push-pull; drives RESET line directly without pull-up resistor, reducing BOM count |
| Tempco | 40ppm/°C; maintains tight threshold stability across industrial temperature range |
| VCC Transient Immunity | Rejects ≤200µs negative glitches at 100mV overdrive; prevents false resets in electrically noisy systems |
Pinout & Package
MAX6326XR30 is housed in a 3-pin SOT23-3 or SC70-3 package - footprint-compatible, lead-free capable, and optimized for high-density PCB layouts in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground Reference | Return path for internal comparator and output driver; must be connected to system ground plane for noise immunity |
| 2 (RESET) | Active-Low Push-Pull Output | Drives µP RESET pin low during fault; actively pulls high when released - no external pull-up required |
| 3 (VCC) | Supply Input | Monitored power rail input; powers internal circuitry and enables reset assertion when voltage drops below 3.0V |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 1µA supply current | Extends battery runtime in always-on IoT endpoints and handheld medical devices |
| Precision 3.0V reset threshold | Matches standard 3.0V logic supply rails without external resistor dividers or trimming |
| 100ms minimum reset pulse width | Guarantees complete firmware boot sequence execution in ARM Cortex-M and PIC microcontrollers |
| Push-pull active-low output | Eliminates need for external pull-up resistor, saving board space and reducing EMI susceptibility |
| Factory-trimmed threshold | Delivers production-ready accuracy without post-manufacture calibration or test adjustments |
Applications
| Computers | Intelligent Instruments |
|---|---|
Use Scenario: Embedded controller in fanless industrial PC undergoing unregulated AC/DC adapter input with ripple and dropout. IC Role / Device Role / Timing Role: Power-on reset supervisor asserting clean, timed RESET signal to x86 or RISC-V SoC during cold start and brownout recovery. Use Value: Prevents corrupted BIOS initialization and flash writes by guaranteeing ≥100ms reset hold time independent of input rail slew rate. | Use Scenario: Portable multimeter with lithium coin-cell battery and segmented LCD display. IC Role / Device Role / Timing Role: Low-voltage detector and reset generator ensuring µC remains held in reset until 3.0V rail stabilizes post-battery insertion. Use Value: Enables single-button power-on with zero standby current draw (1µA ICC) and eliminates manual reset switch requirement. |
| Automotive ECUs | Portable/Battery-Powered |
Use Scenario: Body control module subjected to load-dump and cold-crank transients on 3.0V auxiliary rail. IC Role / Device Role / Timing Role: Immune reset supervisor rejecting ≤200µs negative VCC glitches while asserting reset on sustained undervoltage. Use Value: Avoids spurious ECU resets during engine cranking, improving ASIL-B functional safety compliance without added filtering. | Use Scenario: Wireless sensor node powered by CR2032 coin cell, transmitting temperature data every 5 minutes. IC Role / Device Role / Timing Role: Power-fail monitor enabling graceful shutdown and nonvolatile state save before brownout-induced crash. Use Value: Preserves calibration data and last-measurement timestamp using guaranteed 100ms reset window for EEPROM write completion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TR30D3T | Same 3.0V threshold, but 2.5µA max ICC and only specified to VCC ≥1.2V | Lacks 1V operation capability and has higher supply current - less suitable for ultra-low-power wake-on-event designs | Select MAX6326XR30 when operating below 1.2V or requiring sub-2µA quiescent current |
| TPS3808G30DBVR | 3.0V threshold with 1.8µA typical ICC, but requires external capacitor for adjustable delay and lacks factory trim | Needs layout area for timing capacitor; reset timeout varies with component tolerance and temperature | Choose MAX6326XR30 for fixed, guaranteed 100ms delay without external components or tuning |
Compared with MAX809TR30D3T and TPS3808G30DBVR, the MAX6326XR30 provides lower supply current, guaranteed 1V operation, and factory-trimmed timing - delivering higher reliability and smaller BOM in space- and power-constrained portable and automotive applications.
Availability
MAX6326XR30 is available at Aetrix Electronics and suitable for computers, intelligent instruments, and automotive ECUs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6326XR30 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 analog, mixed-signal, and power-management ICs for industrial, automotive, and communications markets.
The MAX6326XR30 belongs to Maxim's µP supervisory circuit product line - engineered for high-accuracy, ultra-low-power reset generation in battery-operated and mission-critical embedded systems.
FAQ
What is the exact reset threshold voltage of the MAX6326XR30 and how tightly is it specified?
The MAX6326XR30 has a factory-trimmed nominal reset threshold of 3.0V, with ±1.5% tolerance at +25°C and ±2.5% over the full –40°C to +85°C operating range. This precision eliminates need for external adjustment and ensures consistent brownout detection across production units and temperature extremes - critical for reliable operation in MAX6326XR30-based power-monitoring circuits.
Does the MAX6326XR30 require any external components to function?
No, the MAX6326XR30 operates autonomously with no external components required. Its internal precision reference, comparator, and push-pull output eliminate the need for resistive dividers, timing capacitors, or pull-up resistors - simplifying design, reducing bill-of-materials cost, and improving reliability in MAX6326XR30 deployments across portable and industrial applications.
What is the minimum VCC voltage at which the MAX6326XR30 guarantees correct reset state?
The MAX6326XR30 guarantees correct reset assertion and release behavior down to VCC = 1.0V - enabling robust supervision during deep brownout conditions where other supervisors fail. This 1V operation margin ensures MAX6326XR30 remains functional even as backup batteries deplete or input rails sag, making it suitable for fail-safe systems.
How does the MAX6326XR30 handle fast voltage transients on the VCC line?
The MAX6326XR30's reset comparator is designed to ignore fast negative-going VCC transients up to 200µs in duration when overdriven by 100mV - preventing false resets in electrically noisy environments. This transient immunity is verified across temperature and ensures MAX6326XR30 delivers deterministic reset behavior in automotive and industrial power systems.
Is the MAX6326XR30 pin-compatible with legacy Maxim reset supervisors like the MAX809?
Yes, the MAX6326XR30 shares identical pinout (VCC–RESET–GND), package dimensions, and functional interface with MAX809/MAX810 series devices - enabling drop-in replacement in existing designs. However, MAX6326XR30 adds 1V operation, lower 1µA supply current, and tighter threshold accuracy, enhancing performance without requiring PCB changes in MAX6326XR30 retrofits.
MAX6326XR30 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3V
- 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
MAX6326XR30 FAQ
1.How can I place an order for MAX6326XR30 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6326XR30 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 MAX6326XR30 reliable?
The price and inventory of MAX6326XR30 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6326XR30 is usually 5 days.
3.What payment methods are accepted for MAX6326XR30?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6326XR30 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6326XR30?
MAX6326XR30 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6326XR30 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 MAX6326XR30?
For technical support, including MAX6326XR30 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6326XR30 requirements.
6.How does Aetrix verify that MAX6326XR30 is sourced from the original manufacturer or authorized distributors?
All MAX6326XR30 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 MAX6326XR30 meets industry standards.
7.What is the process for return or replacement of MAX6326XR30?
All MAX6326XR30 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6326XR30, 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 MAX6326XR30 part is unused and in its original packaging.
Return procedure for MAX6326XR30:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6326XR30 Tags
-
MIC826SYMT-TR
Microchip Technology
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APX803S-31SA-7
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APX803L20-29SA-7
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MCP130T-315I/TT
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