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Analog Devices Inc./Maxim Integrated MAX6328UR26+T
- Part No.:
- MAX6328UR26+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6328UR26+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,328
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Product details
Overview
MAX6328UR26+T from Maxim Integrated is an open-drain, active-low microprocessor supervisory circuit in SOT23-3 package, monitoring VCC supply voltage with factory-trimmed 2.63V reset threshold (±2.5% over -40°C to +85°C), 100ms minimum reset timeout, and ultra-low 1µA max supply current - used for reliable power-on/brownout reset assertion in portable 3.3V embedded systems.
For engineers reviewing the MAX6328UR26+T datasheet, MAX6328UR26+T pinout, MAX6328UR26+T application, or MAX6328UR26+T equivalent, key selection criteria include open-drain RESET output compatibility with bidirectional µP reset pins, 2.63V threshold tolerance across temperature, immunity to sub-100µs VCC transients, and SOT23-3 footprint suitability for space-constrained battery-powered designs.
Technical Context
The MAX6328UR26+T implements a precision bandgap-based reset comparator with 40ppm/°C tempco and 6.3mV hysteresis, asserting RESET low when VCC falls below 2.63V and holding it for ≥100ms after VCC recovers. Its open-drain output requires an external pull-up and supports wired-OR reset arbitration with µPs like the Motorola 68HC11.
It operates from 1.2V to 5.5V VCC, guarantees correct state down to 1V, and rejects fast transients via internal filtering - enabling robust reset generation during power-up, brownout, and short-duration negative-going VCC glitches without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V ±2.5% over -40°C to +85°C - ensures deterministic reset activation at defined 3.3V rail collapse point |
| Supply Current | 1µA max at 3V - enables multi-year battery life in always-on portable instrumentation |
| Reset Timeout | 100ms to 280ms - guarantees sufficient µP initialization time after power recovery |
| Output Type | Open-drain active-low - allows shared reset bus with external pull-up and bidirectional µP interface |
| VCC Operating Range | 1.2V to 5.5V - supports operation across 2.5V, 3V, 3.3V, and 5V systems |
| Transient Immunity | Rejects VCC glitches <100µs at 200mV overdrive - prevents false resets during digital 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 low-impedance connection to system ground plane |
| 2 (RESET) | Open-drain active-low reset output | Drives low during reset; requires external pull-up resistor to VCC or another logic rail for proper level translation |
| 3 (VCC) | Power supply input | Monitored voltage source; powers internal circuitry and defines reset threshold reference point |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.63V with ±1.5% room-temp accuracy and ±2.5% full-temperature range tolerance - eliminates manual calibration |
| Ultra-low quiescent current | 1µA max supply current - reduces standby power loss in battery-critical applications |
| Open-drain output architecture | Enables wired-OR reset bus sharing with multiple supervisors or µPs - simplifies system-level reset coordination |
| Power-supply transient immunity | Immune to VCC glitches <100µs duration at 200mV overdrive - avoids spurious resets in noisy environments |
| No external components required | Self-contained reset generation with internal precision reference and timing - reduces BOM count and layout area |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Wearable ECG sensor operating from coin-cell battery with intermittent wake-up cycles. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to ARM Cortex-M0 during VCC brownout below 2.63V. Use Value: 1µA max ICC extends battery life beyond 3 years; open-drain output interfaces directly to µP's bidirectional reset pin without level-shifting. | Use Scenario: DIN-rail mounted I/O module powered by 3.3V DC-DC converter in factory automation cabinet. IC Role / Device Role / Timing Role: Power-monitoring supervisor ensuring clean µP reset after 100ms power recovery following line dip. Use Value: 2.63V threshold matches 3.3V rail tolerance; 100ms–280ms timeout accommodates slow-rising industrial power supplies. |
| Handheld Test Equipment | Smart Energy Meters |
Use Scenario: Battery-powered multimeter with LCD display and auto-ranging ADC requiring glitch-free startup. IC Role / Device Role / Timing Role: Reset generator holding µC in reset until stable 3.3V rail is confirmed post-power-on. Use Value: SOT23-3 footprint saves board space; 40ppm/°C tempco maintains threshold stability across operating temperature range. | Use Scenario: ANSI C12.20-compliant electricity meter with isolated power rails and tamper-detection logic. IC Role / Device Role / Timing Role: Primary VCC monitor on main 3.3V domain, asserting RESET to secure MCU during undervoltage events. Use Value: 2.63V threshold provides 700mV margin above 3.3V nominal rail; open-drain output integrates with existing reset supervision tree. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2+T | Push-pull active-low RESET output; 2.63V threshold; same SOT23-3 package but no open-drain capability | Requires dedicated reset net; incompatible with wired-OR or bidirectional µP reset pins | Select only if system uses single-supervisor topology and does not require shared reset bus |
| TPS3808G12DBVR | Adjustable reset threshold (via external resistor); 1.2µA typical ICC; 200ms fixed timeout; SOT23-5 package | Larger footprint and higher pin count; threshold tuning adds component and calibration overhead | Choose when design requires field-programmable threshold or tighter timeout control than fixed 100ms min |
Compared with MAX809TRD2+T and TPS3808G12DBVR, the MAX6328UR26+T uniquely delivers open-drain reset signaling in minimal SOT23-3 form factor with guaranteed 1µA max ICC - making it optimal for space- and power-constrained systems needing reset bus arbitration.
Availability
MAX6328UR26+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, handheld test equipment, and smart energy meters requiring stable component supply, long-term lifecycle support, and RoHS-compliant lead-free packaging.
Supply support for MAX6328UR26+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, sensing, connectivity, and security applications.
The MAX632x family delivers ultra-low-power, precision voltage supervisors for microprocessor reset management - designed specifically for battery-operated and space-constrained embedded systems demanding high reliability and minimal external components.
FAQ
What is the exact reset threshold voltage of MAX6328UR26+T and how does it vary with temperature?
The MAX6328UR26+T has a factory-trimmed nominal reset threshold of 2.63V, with ±1.5% tolerance at +25°C and ±2.5% over the full -40°C to +85°C operating range. Its temperature coefficient is 40ppm/°C, meaning threshold drift is limited to approximately ±10.5mV across the temperature range - verified per Electrical Characteristics table in the official datasheet.
Does MAX6328UR26+T require an external pull-up resistor on its RESET pin?
Yes, the MAX6328UR26+T features an open-drain RESET output and requires an external pull-up resistor to a valid logic rail (e.g., VCC or another supply) to establish a defined high state when reset is inactive. Typical values range from 10kΩ to 100kΩ depending on bus capacitance and rise-time requirements - confirmed in Pin Description and Applications Information sections.
What is the minimum VCC voltage at which MAX6328UR26+T remains functional and asserts valid reset behavior?
The MAX6328UR26+T guarantees correct reset state down to VCC = 1V, and its internal circuitry remains operational across 1.2V to 5.5V. Below 1.2V, reset assertion is maintained but not actively monitored - this behavior is explicitly stated in the General Description and Absolute Maximum Ratings sections of the datasheet.
How does the reset timeout period of MAX6328UR26+T behave across temperature and supply voltage?
The MAX6328UR26+T provides a minimum reset timeout of 100ms after VCC rises above the threshold, with typical values ranging from 100ms to 280ms depending on temperature and process variation. This is fully specified over -40°C to +85°C and independent of VCC within operating range - documented in the Electrical Characteristics table under "Reset Active Timeout Period".
Is MAX6328UR26+T pin-compatible with other members of the MAX632x family such as MAX6326UR26+T or MAX6327UR26+T?
Yes, all MAX632x variants including MAX6328UR26+T, MAX6326UR26+T, and MAX6327UR26+T share identical SOT23-3 pinout (GND, RESET, VCC) and footprint. However, output type differs: MAX6328UR26+T is open-drain, while MAX6326UR26+T is push-pull active-low and MAX6327UR26+T is push-pull active-high - confirmed in Pin Configuration and Ordering Information tables.
MAX6328UR26+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:
- 2.63V
- Output:
- Open Drain or Open Collector
- 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
MAX6328UR26+T FAQ
1.How can I place an order for MAX6328UR26+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6328UR26+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 MAX6328UR26+T reliable?
The price and inventory of MAX6328UR26+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6328UR26+T is usually 5 days.
3.What payment methods are accepted for MAX6328UR26+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6328UR26+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6328UR26+T?
MAX6328UR26+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6328UR26+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 MAX6328UR26+T?
For technical support, including MAX6328UR26+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6328UR26+T requirements.
6.How does Aetrix verify that MAX6328UR26+T is sourced from the original manufacturer or authorized distributors?
All MAX6328UR26+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 MAX6328UR26+T meets industry standards.
7.What is the process for return or replacement of MAX6328UR26+T?
All MAX6328UR26+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6328UR26+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 MAX6328UR26+T part is unused and in its original packaging.
Return procedure for MAX6328UR26+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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