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Analog Devices Inc./Maxim Integrated MAX6326UR29+T
- Part No.:
- MAX6326UR29+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6326UR29+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:6,208
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Product details
Overview
MAX6326UR29+T from Maxim Integrated is an ultra-low-power, active-low push-pull microprocessor supervisory circuit designed to monitor 2.93V power supplies in embedded µP systems. It asserts a reset signal when VCC drops below 2.93V (±2.5% over temperature), holds reset for ≥100ms after VCC recovers, draws ≤1µA supply current at 3V, and operates from 1.2V to 5.5V supply range - ideal for battery-powered instrumentation and portable controllers.
For engineers reviewing the MAX6326UR29+T datasheet, MAX6326UR29+T pinout, MAX6326UR29+T application, or MAX6326UR29+T equivalent, key selection criteria include its factory-trimmed 2.93V reset threshold, SOT23-3 package compatibility, 100ms minimum reset timeout, push-pull active-low output drive capability, and guaranteed operation down to 1.2V VCC - all critical for reliable brownout detection in space-constrained industrial and portable designs.
Technical Context
The MAX6326UR29+T integrates a precision bandgap-based voltage comparator with hysteresis (6.3mV) and a 100ms internal timer to generate a clean, glitch-immune reset pulse. Its reset assertion logic is fully specified from -40°C to +85°C, with reset threshold tempco of 40ppm/°C and immunity to VCC transients up to 100µs at 100mV overdrive.
As a member of the MAX6326 family, it uses a single-supply architecture with no external components required and features a dedicated GND–VCC–RESET pinout optimized for minimal PCB footprint. The push-pull output drives low to ≤0.3V at 1.6mA while asserted and high to ≥0.8·VCC while deasserted - enabling direct interface with µP reset inputs without pull-up resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±2.5% over -40°C to +85°C - ensures reliable brownout detection for 3.0V nominal rails with margin |
| Supply Current | ≤1.0µA max at 3V - enables multi-year battery life in always-on monitoring applications |
| Reset Timeout | 100ms to 280ms - guarantees sufficient processor initialization time after power recovery |
| VCC Operating Range | 1.2V to 5.5V - supports operation during deep brownout and across multiple supply domains |
| Output Type | Active-low push-pull - eliminates need for external pull-up resistor and reduces BOM count |
| Reset Hysteresis | 6.3mV - prevents chatter near threshold during slow VCC ramp-up or noise events |
| Package | SOT23-3 - 2.92mm × 1.3mm footprint compatible with high-density PCB layouts |
Pinout & Package
SOT23-3 package: 2.92mm × 1.3mm × 1.02mm body, gull-wing leads, RoHS-compliant lead-free finish (+T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal comparator and output stage; must be connected directly to system ground plane |
| 2 (RESET) | Active-low push-pull reset output | Drives low (≤0.3V @ 1.6mA) during reset; drives high (≥0.8·VCC) otherwise - interfaces directly with µP reset pin |
| 3 (VCC) | Power supply input | Monitored supply rail; accepts 1.2V–5.5V; internally powers comparator, timer, and output driver |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1µA max enables >10-year coin-cell operation in wireless sensor nodes |
| Precision reset threshold | 2.93V ±2.5% over full temperature range ensures consistent brownout response across environments |
| No external components | Eliminates discrete R/C networks and trimming potentiometers - reduces BOM cost and layout area |
| Transient immunity | Rejects VCC glitches <100µs at 100mV overdrive - prevents false resets in noisy power systems |
| Guaranteed state down to 1.2V | Ensures valid reset assertion even during severe undervoltage conditions before complete power loss |
Applications
| Industrial Controllers | Portable Medical Devices |
|---|---|
|
Use Scenario: PLC I/O modules operating on 3.0V rails in factory automation cabinets subject to voltage sags and EMI. IC Role / Device Role / Timing Role: Monitors 3.0V VCC and asserts active-low RESET to ARM Cortex-M7 MCU until stable power is confirmed. Use Value: Prevents firmware corruption during 100ms–200ms line dips by guaranteeing minimum reset hold time independent of capacitor size. |
Use Scenario: Handheld glucose meters powered by CR2032 coin cells with aging-induced voltage droop. IC Role / Device Role / Timing Role: Detects VCC falling below 2.93V and forces MCU reset before ADC reference instability causes erroneous readings. Use Value: Enables accurate low-voltage operation down to 1.2V VCC while consuming only 1µA - extending battery life beyond 2 years. |
| Smart Energy Meters | IoT Edge Gateways |
|
Use Scenario: DIN-rail mounted electricity meters exposed to wide ambient temperatures (-40°C to +85°C) and grid transients. IC Role / Device Role / Timing Role: Provides temperature-stable reset supervision for dual-core metering SoC with 3.3V supply. Use Value: 40ppm/°C tempco and ±2.5% threshold tolerance ensure consistent reset behavior across operating life without calibration. |
Use Scenario: Cellular-connected gateways using 3.0V LDOs feeding application processors in remote deployments. IC Role / Device Role / Timing Role: Generates clean, bounce-free reset pulse upon cold start or brownout recovery to prevent boot failures. Use Value: Push-pull output eliminates external pull-up, reducing component count and improving reliability in high-humidity environments. |
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 | 2.93V threshold, same SOT23-3 package, but higher 2.5µA supply current and no guaranteed 1.2V operation | Lacks deep-brownout support below 1.8V; less suitable for ultra-low-power coin-cell systems | Select MAX6326UR29+T when sub-1.8V operation or <1µA ICC is required |
| TPS3808G33DBVR | 3.3V threshold (not 2.93V), 1.6µA ICC, adjustable delay, but requires external capacitor for timing | Fixed 3.3V trip point mismatches 3.0V rail monitoring; added external component increases BOM and layout complexity | Select MAX6326UR29+T for precise 2.93V detection with zero external parts and smallest footprint |
Compared with MAX809TRD2+T and TPS3808G33DBVR, the MAX6326UR29+T uniquely combines factory-trimmed 2.93V accuracy, guaranteed 1.2V operation, and 1µA max ICC in a no-component SOT23-3 solution - making it optimal for cost-sensitive, space-constrained, and ultra-low-power 3.0V system supervision.
Availability
MAX6326UR29+T is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, smart energy meters, and IoT edge gateways requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6326UR29+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, communications, and computing markets - emphasizing reliability, integration, and low-power performance.
The MAX6326 family delivers ultra-low-power, factory-trimmed µP reset supervision for battery-powered and space-constrained embedded systems - targeting applications where supply stability, small footprint, and long operational life are critical design requirements.
FAQ
What is the exact reset threshold voltage of the MAX6326UR29+T?
The MAX6326UR29+T has a factory-trimmed reset threshold of 2.93V, with ±1.5% tolerance at +25°C and ±2.5% over the full -40°C to +85°C operating temperature range. This value is confirmed in Table 1 of the official datasheet and corresponds to the "R29" suffix in the part number.
Does the MAX6326UR29+T require any external components to function?
No, the MAX6326UR29+T requires no external components. Its internal precision voltage reference, comparator, timer, and push-pull output driver are fully integrated. Unlike adjustable supervisors, it needs only VCC, GND, and the RESET load - eliminating resistors, capacitors, or trimming elements from the design.
What is the maximum supply current draw of the MAX6326UR29+T?
The MAX6326UR29+T draws a maximum supply current of 1.0µA at VCC = 3.0V and TA = +25°C, and up to 1.75µA at VCC = 5.5V. This ultra-low ICC is guaranteed across temperature and enables multi-year operation in battery-powered systems such as portable medical monitors and wireless sensors.
Is the MAX6326UR29+T pin-compatible with other reset ICs?
Yes, the MAX6326UR29+T is pin-compatible with the MAX803/MAX809/MAX810 series in SOT23-3 packages. Pin 1 is GND, Pin 2 is RESET (active-low push-pull), and Pin 3 is VCC - matching industry-standard µP reset supervisor pinouts for drop-in replacement in existing layouts.
What package type and RoHS status does the MAX6326UR29+T use?
The MAX6326UR29+T uses the 3-pin SOT23-3 package (outline U3-1) with dimensions 2.92mm × 1.3mm × 1.02mm. The "+T" suffix indicates lead-free, RoHS-compliant packaging per JEDEC J-STD-020, verified by Maxim Integrated's package documentation and land pattern files.
MAX6326UR29+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:
- 2.93V
- 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
MAX6326UR29+T FAQ
1.How can I place an order for MAX6326UR29+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6326UR29+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 MAX6326UR29+T reliable?
The price and inventory of MAX6326UR29+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6326UR29+T is usually 5 days.
3.What payment methods are accepted for MAX6326UR29+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6326UR29+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6326UR29+T?
MAX6326UR29+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6326UR29+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 MAX6326UR29+T?
For technical support, including MAX6326UR29+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6326UR29+T requirements.
6.How does Aetrix verify that MAX6326UR29+T is sourced from the original manufacturer or authorized distributors?
All MAX6326UR29+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 MAX6326UR29+T meets industry standards.
7.What is the process for return or replacement of MAX6326UR29+T?
All MAX6326UR29+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6326UR29+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 MAX6326UR29+T part is unused and in its original packaging.
Return procedure for MAX6326UR29+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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