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Analog Devices Inc./Maxim Integrated MAX6326UR26-T
- Part No.:
- MAX6326UR26-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6326UR26-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,473
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Product details
Overview
MAX6326UR26-T from Maxim Integrated is an ultra-low-power, active-low push-pull microprocessor supervisory circuit in SOT23-3 package. It monitors VCC supply voltage (1.2V to 5.5V), asserts reset when VCC falls below 2.63V ±2.5%, and holds reset for ≥100ms after VCC recovers - ensuring reliable power-on initialization in battery-powered embedded controllers.
For engineers reviewing the MAX6326UR26-T datasheet, MAX6326UR26-T pinout, MAX6326UR26-T application, or MAX6326UR26-T equivalent, key selection criteria include its 1µA max supply current, factory-trimmed 2.63V reset threshold with 40ppm/°C tempco, open-circuit immunity to fast VCC transients, and compatibility with 3.3V/5V µP systems requiring guaranteed reset assertion down to 1V VCC.
Technical Context
The MAX6326UR26-T implements a precision bandgap-based reset comparator with hysteresis (6.3mV) and internal timing capacitor to guarantee ≥100ms reset timeout after power-up. Its push-pull RESET output drives low (≤0.3V at 1.6mA) during fault and high (≥0.8·VCC at 500µA) otherwise - eliminating need for external pull-up resistors.
Designed for brownout detection in portable systems, it operates across -40°C to +85°C with full electrical specification, ignores VCC transients ≤20µs (at 200mV overdrive), and maintains valid reset state down to 1V VCC - enabling use in deep-sleep microcontroller power domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V ±2.5% (TA = -40°C to +85°C); ensures reliable brownout detection for 3.3V systems with margin |
| Supply Current | 1.0µA max (VCC = 3.2V); enables multi-year operation on coin-cell batteries |
| Reset Timeout | 100ms min power-on delay; meets µP minimum reset pulse width requirements |
| Operating Voltage | 1.2V to 5.5V; supports operation during deep brownout and full 5V logic rails |
| Output Type | Active-low push-pull; drives RESET directly without external pull-up, reducing BOM count |
| Tempco | 40ppm/°C; limits threshold drift to ±21mV over full temperature range |
| VCC Transient Immunity | Rejects negative glitches ≤20µs at 200mV overdrive; prevents false resets in noisy environments |
Pinout & Package
SOT23-3 package: 3-pin surface-mount, 1.3mm × 2.9mm footprint, 0.95mm height, lead-free (RoHS-compliant) option available as MAX6326UR26+T.
| 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 reset output | Drives low (≤0.3V) during reset; high (≥0.8·VCC) otherwise; directly interfaces µP reset input without pull-up |
| 3 (VCC) | Supply input | Power source for internal circuitry; also monitored for reset generation; accepts 1.2V–5.5V with full spec compliance |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1µA max enables >10-year battery life in always-on monitoring applications |
| Precision reset threshold | Factory-trimmed 2.63V with ±2.5% tolerance over temperature eliminates manual calibration |
| No external components | Integrated timing capacitor and comparator eliminate discrete R/C network and reduce PCB area by ≥3mm² |
| Guaranteed reset at low VCC | Valid reset assertion down to 1V VCC supports ultra-low-power sleep modes in modern µCs |
| Transient-immune design | Internal filtering rejects sub-20µs VCC noise spikes common in switching power supply environments |
Applications
| Industrial PLC I/O Module | Battery-Powered Data Logger |
|---|---|
Use Scenario: PLC module powers up after field wiring changes or brownout recovery. IC Role / Device Role / Timing Role: Supervisory circuit asserting hardware reset to ARM Cortex-M4 controller until stable 3.3V rail is confirmed. Use Value: Prevents firmware execution from corrupted memory state by enforcing ≥100ms reset hold time aligned with µP spec. | Use Scenario: Remote environmental sensor node wakes every 2 hours on RTC alarm, samples sensors, and transmits via LoRaWAN. IC Role / Device Role / Timing Role: Reset supervisor monitoring 3.0V Li-SOCl₂ battery output during cold-start and low-voltage aging. Use Value: 1µA quiescent current extends 2000mAh battery life to >7 years; 2.63V threshold triggers reset before µC brownout lockup. |
| Medical Wearable ECG Patch | Automotive Body Control Module (BCM) |
Use Scenario: Disposable ECG patch powers on from button press; analog front-end and BLE SoC require clean reset. IC Role / Device Role / Timing Role: Active-low push-pull reset generator ensuring synchronized startup of ADS129x analog IC and nRF52840 SoC. Use Value: Push-pull output eliminates external pull-up resistor - critical for minimizing leakage paths in ultra-low-current analog signal chains. | Use Scenario: BCM experiences load-dump transients during alternator regulation or relay switching. IC Role / Device Role / Timing Role: Brownout detector monitoring 5V domain supplying CAN transceiver and microcontroller. Use Value: 20µs transient immunity prevents spurious resets during ISO 7637-2 Pulse 1/2a events; 4.3V+ versions used elsewhere in same platform. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD3-T | Same SOT23-3 package, 2.63V threshold, but 3.5µA max ICC and no guaranteed operation below 1.2V VCC | Less suitable for sub-1.2V brownout detection or multi-decade battery life targets | Select MAX6326UR26-T when <1µA supply current or 1V VCC operation is required |
| TPS3808G125DBVR | 2.63V threshold, 1.8µA max ICC, but requires external pull-up for open-drain output (not push-pull) | Increases BOM count and leakage risk in high-impedance reset networks | Select MAX6326UR26-T when push-pull output and zero external components are mandatory |
Compared with MAX809TRD3-T and TPS3808G125DBVR, the MAX6326UR26-T delivers lowest ICC, widest VCC operating range (down to 1V), and true push-pull drive - making it optimal for space-constrained, ultra-low-power, and deep-brownout-sensitive designs.
Availability
MAX6326UR26-T is available at Aetrix Electronics and suitable for industrial PLCs, battery-powered data loggers, medical wearables, automotive body control modules, and portable instrumentation requiring stable component supply with long-term lifecycle support.
Supply support for MAX6326UR26-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 industrial, medical, communications, and consumer applications.
The MAX6326 family delivers ultra-low-power, factory-trimmed reset supervision for microprocessor-based systems where reliability, small size, and minimal quiescent current are critical design constraints.
FAQ
What is the exact reset threshold voltage of MAX6326UR26-T and how tightly is it specified?
The MAX6326UR26-T has a nominal reset threshold of 2.63V, factory-trimmed with ±1.5% tolerance at +25°C and ±2.5% over the full -40°C to +85°C operating range. This corresponds to a guaranteed 2.564V to 2.696V window at temperature extremes - sufficient for robust 3.3V system brownout detection with margin against ripple and noise.
Does MAX6326UR26-T require any external components to function?
No, the MAX6326UR26-T requires zero external components. Its internal precision voltage reference, comparator, and timing capacitor fully implement reset generation and 100ms timeout. The push-pull RESET output drives directly into the microprocessor's reset pin without needing a pull-up resistor - reducing bill-of-materials and PCB area.
Can MAX6326UR26-T operate reliably when VCC drops below 2.0V?
Yes, the MAX6326UR26-T is fully specified to assert and maintain a valid reset signal down to VCC = 1.0V. Its internal circuitry remains functional and the RESET output stays asserted (low) even as VCC declines from 2.63V to 1.0V - enabling safe shutdown sequencing in ultra-low-power microcontrollers with deep-sleep domains.
What is the maximum VCC slew rate the MAX6326UR26-T can tolerate without generating false resets?
The MAX6326UR26-T is rated for VCC slew rates up to 100V/µs. Its internal comparator incorporates filtering that rejects fast transients - specifically, it ignores negative-going VCC glitches ≤20µs duration when overdriven by 200mV below threshold. This ensures immunity to switching regulator noise and load-dump edges.
Is MAX6326UR26-T pin-compatible with legacy Maxim reset supervisors like MAX809?
Yes, the MAX6326UR26-T uses the identical SOT23-3 pinout (GND, RESET, VCC) and is explicitly designed as a drop-in upgrade for MAX809/MAX810 series. It shares the same footprint, thermal characteristics, and interface behavior - allowing direct replacement without PCB layout changes while delivering lower ICC and extended VCC range.
MAX6326UR26-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:
- Obsolete
- 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:
- SOT-23-3
MAX6326UR26-T FAQ
1.How can I place an order for MAX6326UR26-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6326UR26-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 MAX6326UR26-T reliable?
The price and inventory of MAX6326UR26-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6326UR26-T is usually 5 days.
3.What payment methods are accepted for MAX6326UR26-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6326UR26-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6326UR26-T?
MAX6326UR26-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6326UR26-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 MAX6326UR26-T?
For technical support, including MAX6326UR26-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6326UR26-T requirements.
6.How does Aetrix verify that MAX6326UR26-T is sourced from the original manufacturer or authorized distributors?
All MAX6326UR26-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 MAX6326UR26-T meets industry standards.
7.What is the process for return or replacement of MAX6326UR26-T?
All MAX6326UR26-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6326UR26-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 MAX6326UR26-T part is unused and in its original packaging.
Return procedure for MAX6326UR26-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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