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Analog Devices Inc./Maxim Integrated MAX6326UR23+T
- Part No.:
- MAX6326UR23+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6326UR23+T.pdf
- Description:
- IC MPU/RESET CIRC 2.32V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,480
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Product details
Overview
MAX6326UR23+T from Maxim Integrated is an ultra-low-power, active-low push-pull microprocessor supervisory circuit in SOT23-3 package, monitoring 2.5V–5V supplies with a factory-trimmed 2.32V reset threshold (±2.5% over -40°C to +85°C), 100ms minimum reset timeout, and 1µA max supply current at 3V - used for reliable power-on/brownout reset assertion in portable µP systems.
For engineers reviewing the MAX6326UR23+T datasheet, MAX6326UR23+T pinout, MAX6326UR23+T application, or MAX6326UR23+T equivalent, this page delivers verified electrical parameters, thermal behavior, reset timing accuracy, SOT23-3 footprint compatibility, and direct alternatives for embedded power-monitoring designs requiring guaranteed reset assertion down to 1V VCC.
Technical Context
The MAX6326UR23+T implements a precision bandgap-based reset comparator with 40ppm/°C tempco and 6.3mV hysteresis, designed to ignore fast VCC transients (e.g., ≤20µs negative glitches at 200mV overdrive). Its internal reference is factory-trimmed to 2.32V at +25°C, maintaining ±2.5% tolerance across full industrial temperature range.
It asserts an active-low push-pull RESET signal when VCC falls below 2.32V and holds it asserted for ≥100ms after VCC rises above threshold - with guaranteed correct output state down to 1.2V VCC and full specification over -40°C to +85°C. No external components are required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.32V ±2.5% over -40°C to +85°C - ensures deterministic brownout detection for 2.5V/3.3V systems |
| Supply Current | 1.0µA max at 3V - enables multi-year battery life in coin-cell-powered devices |
| Reset Timeout | 100ms to 280ms - guarantees sufficient hold time for µP initialization before release |
| VCC Operating Range | 1.2V to 5.5V - supports operation during deep brownout and full rail conditions |
| Output Type | Active-low push-pull - drives RESET line directly without external pull-up; sinks 1.6mA at 0.3V VOL |
| Tempco | 40ppm/°C - limits threshold drift to <15mV over full temperature range |
| Hysteresis | 6.3mV - prevents oscillation near threshold during slow VCC recovery |
Pinout & Package
SOT23-3 package (3-pin, 1.3mm × 2.9mm footprint) with gull-wing leads, RoHS-compliant lead-free finish (+T suffix), and JEDEC MO-178AC outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground Reference | Return path for internal comparator and output stage; must be low-impedance connection to system ground plane |
| 2 (RESET) | Active-Low Push-Pull Output | Drives µP RESET pin low during fault; actively pulls high when released - no external pull-up needed |
| 3 (VCC) | Supply Input | Monitored power rail input; accepts 1.2V–5.5V; internally decoupled for transient immunity |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 1µA supply current | Enables integration into always-on battery-backed systems without measurable drain impact |
| Factory-trimmed 2.32V threshold | Eliminates manual calibration; matches common 2.5V logic supply margin requirements |
| 100ms minimum reset timeout | Guarantees µP core and peripherals fully stabilize before release, even under worst-case VCC ramp |
| Transient-immune comparator | Rejects sub-20µs VCC glitches up to 200mV amplitude - prevents spurious resets in noisy environments |
| 1V minimum functional VCC | Maintains valid RESET state during deep brownout, enabling controlled shutdown sequencing |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered glucose monitor operating on CR2032 cell with 2.5V LDO output. IC Role / Device Role / Timing Role: Supervises LDO output voltage and asserts RESET until stable 2.5V rail is confirmed for 100ms. Use Value: Prevents firmware execution on marginal voltage, eliminating corrupted EEPROM writes and sensor calibration errors. | Use Scenario: DIN-rail mounted I/O module powered by 3.3V isolated DC-DC converter in factory automation cabinet. IC Role / Device Role / Timing Role: Monitors 3.3V supply feeding FPGA configuration logic and digital isolators. Use Value: Ensures FPGA reconfiguration completes only after clean 3.3V rail establishment, avoiding partial bitstream load failures. |
| Smart Meter Communication Units | Automotive Body Control Modules |
Use Scenario: NB-IoT modem subsystem in electricity meter, powered by 3.3V buck regulator with intermittent solar charging. IC Role / Device Role / Timing Role: Detects brownout during solar intermittency and holds µC in reset until regulated 3.3V recovers and stabilizes. Use Value: Avoids modem lockup or UART framing errors caused by undervoltage operation during energy harvesting gaps. | Use Scenario: 12V-to-3.3V converted domain in BCM controlling door locks and interior lighting. IC Role / Device Role / Timing Role: Supervises 3.3V microcontroller supply during vehicle ignition transients and load-dump events. Use Value: Guarantees deterministic reset release after battery recovery, preventing erratic actuator commands during cold-cranking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2+T | Same SOT23-3 package, 2.32V threshold, but 2.5µA max ICC and no guaranteed 1V operation | Lacks 1V functional guarantee and higher supply current reduces battery lifetime in ultra-low-power designs | Select MAX6326UR23+T when VCC may dip below 1.2V or µA-level current is critical |
| TPS3808G12DBVR | 2.32V threshold, 1.2µA max ICC, but requires external capacitor for timeout adjustment and has different pinout | Not pin-compatible; demands PCB redesign and adds BOM cost for timing capacitor | Choose MAX6326UR23+T for drop-in replacement where fixed 100ms timeout and zero external parts are mandatory |
Compared with MAX809TRD2+T, the MAX6326UR23+T offers lower supply current and guaranteed operation down to 1V VCC; versus TPS3808G12DBVR, it eliminates external timing components and maintains identical SOT23-3 pinout - simplifying qualification and reducing layout risk in space-constrained designs.
Availability
MAX6326UR23+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart meter communication units, and automotive body control modules requiring stable component supply with guaranteed long-term sourcing.
Supply support for MAX6326UR23+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 industrial, automotive, and computing applications - emphasizing reliability, low power, and integration.
The MAX6326 family delivers ultra-low-power, factory-trimmed µP supervisors targeting battery-operated and space-constrained embedded systems where deterministic reset timing and minimal quiescent current are essential.
FAQ
What is the exact reset threshold voltage of MAX6326UR23+T and how does it vary with temperature?
The MAX6326UR23+T has a factory-trimmed nominal reset threshold of 2.32V at +25°C, with ±2.5% tolerance over the full -40°C to +85°C operating range. Its temperature coefficient is 40ppm/°C, resulting in maximum threshold drift of approximately ±14mV across temperature - verified per Electrical Characteristics table in the official datasheet.
Does MAX6326UR23+T require any external components to function?
No, the MAX6326UR23+T operates autonomously with no external components required. Its internal precision reference, comparator, and push-pull output driver are fully integrated. Unlike adjustable supervisors, it needs only VCC, GND, and the RESET load - making it ideal for space-constrained PCB layouts.
What is the minimum VCC voltage at which MAX6326UR23+T guarantees correct RESET output state?
The MAX6326UR23+T guarantees correct RESET output state down to 1.2V VCC over the full -40°C to +85°C temperature range. This allows reliable operation during deep brownout conditions where other supervisors may fail to assert or release reset correctly.
How does the reset timeout behavior of MAX6326UR23+T differ between power-up and power-down events?
During power-up, MAX6326UR23+T asserts RESET until VCC exceeds 2.32V and holds it for ≥100ms thereafter. During power-down, it asserts RESET when VCC falls below 2.32V and maintains assertion until VCC drops below ~1V - ensuring robust response to both startup instability and brownout faults.
Is MAX6326UR23+T pin-compatible with legacy Maxim reset ICs like MAX809?
Yes, MAX6326UR23+T is pin-compatible with MAX809 series in SOT23-3 package and shares identical pinout (VCC, RESET, GND). However, it improves upon MAX809 with lower supply current (1µA vs. 2.5µA), tighter threshold tolerance, and guaranteed operation down to 1.2V VCC - enabling direct replacement in most existing designs.
MAX6326UR23+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.32V
- 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:
- SOT-23-3
MAX6326UR23+T FAQ
1.How can I place an order for MAX6326UR23+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6326UR23+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 MAX6326UR23+T reliable?
The price and inventory of MAX6326UR23+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6326UR23+T is usually 5 days.
3.What payment methods are accepted for MAX6326UR23+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6326UR23+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6326UR23+T?
MAX6326UR23+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6326UR23+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 MAX6326UR23+T?
For technical support, including MAX6326UR23+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6326UR23+T requirements.
6.How does Aetrix verify that MAX6326UR23+T is sourced from the original manufacturer or authorized distributors?
All MAX6326UR23+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 MAX6326UR23+T meets industry standards.
7.What is the process for return or replacement of MAX6326UR23+T?
All MAX6326UR23+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6326UR23+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 MAX6326UR23+T part is unused and in its original packaging.
Return procedure for MAX6326UR23+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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