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Analog Devices Inc./Maxim Integrated MAX6326UR22-T
- Part No.:
- MAX6326UR22-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6326UR22-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,986
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Product details
Overview
MAX6326UR22-T from Maxim Integrated is an ultra-low-power, active-low push-pull microprocessor supervisory circuit designed to monitor 2.5V–5V power supplies and assert a reset signal during brownout, power-up, or power-down events. It features a factory-trimmed 2.20V reset threshold (±2.5% over –40°C to +85°C), 100ms minimum reset timeout, 1µA max supply current at 3V, and operates down to 1.2V VCC. It is used in portable battery-powered systems requiring reliable, low-quiescent-power reset assertion.
For engineers reviewing the MAX6326UR22-T datasheet, MAX6326UR22-T pinout, MAX6326UR22-T application, or MAX6326UR22-T equivalent, key selection criteria include its SOT23-3 package, push-pull active-low RESET output, guaranteed operation down to 1.2V, immunity to fast VCC transients, and compatibility with µP reset interfaces requiring no external components.
Technical Context
The MAX6326UR22-T implements a precision bandgap-based voltage comparator with hysteresis (6.3mV) to detect VCC falling below 2.20V and hold RESET asserted until VCC rises above threshold and remains stable for ≥100ms. Its internal timing circuit ensures deterministic reset timeout independent of external capacitance.
Designed for direct interface with microprocessor reset inputs, it delivers a push-pull active-low RESET output capable of sourcing 500µA (VOH ≥ 0.8·VCC) and sinking 1.6mA (VOL ≤ 0.3V), eliminating need for external pull-up resistors. Reset threshold tempco is specified at 40ppm/°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.20V ±2.5% (–40°C to +85°C); precise brownout detection point for 2.5V systems |
| Supply Current | 1.0µA max at 3V; enables multi-year battery life in always-on monitoring applications |
| Reset Timeout | 100ms min after VCC rise; ensures µP completes internal initialization before release |
| Operating VCC Range | 1.2V to 5.5V; supports operation during deep brownout and full-system voltage range |
| Output Type | Active-low push-pull; drives RESET line directly without external pull-up resistor |
| Package | SOT23-3; 2.92mm × 1.3mm footprint compatible with high-density PCB layouts |
| Tempco | 40ppm/°C; minimal drift across industrial temperature range ensures stable trip point |
Pinout & Package
SOT23-3 package: 2.92mm × 1.3mm × 1.02mm body, gull-wing leads, RoHS-compliant lead-free option available as MAX6326UR22+T.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - GND | Ground reference | Return path for internal comparator and output stage; must be connected 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 | Power source for internal circuitry; monitored for reset assertion; accepts 1.2V–5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1µA max enables use in coin-cell–powered IoT sensors and wearables |
| Factory-trimmed VTH | 2.20V threshold set at wafer level eliminates calibration and reduces BOM count |
| VCC transient immunity | Rejects <200µs negative glitches at 200mV overdrive-prevents spurious resets |
| No external components | Self-contained reset generation eliminates R/C network, saving board space and cost |
| Guaranteed state down to 1V | Remains functional and holds valid RESET state even during severe brownout conditions |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered glucose monitors and pulse oximeters require reliable power-on reset and brownout protection during intermittent battery discharge. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to ARM Cortex-M0 microcontroller during VCC drop below 2.20V. Use Value: 1µA quiescent current extends single-CR2032 battery life beyond 5 years; 100ms timeout ensures complete MCU boot sequence. | Use Scenario: DIN-rail mounted I/O modules operate in harsh environments with fluctuating 24VDC-derived 3.3V logic rails subject to EMI-induced dips. IC Role / Device Role / Timing Role: Primary reset supervisor for FPGA configuration controller and isolated RS-485 transceivers. Use Value: 40ppm/°C tempco maintains 2.20V trip accuracy across –40°C to +85°C ambient; push-pull output drives multiple loads directly. |
| Smart Energy Meters | Automotive Body Control Modules |
Use Scenario: ANSI C12.20-compliant electricity meters use supercapacitor backup and must retain RTC state while asserting clean reset on main supply loss. IC Role / Device Role / Timing Role: Monitors 3.3V rail derived from buck converter; asserts RESET within 20µs of VCC crossing 2.20V threshold. Use Value: 20µs VCC-to-RESET delay enables deterministic fault response; 1.2V minimum VCC operation supports graceful shutdown during capacitor decay. | Use Scenario: BCMs manage door locks, lighting, and window controls using low-voltage 2.5V microcontrollers powered from vehicle battery via LDO. IC Role / Device Role / Timing Role: Resets Infineon AURIX TC234L during cold-crank (battery dip to 6V) and hot-soak (125°C junction). Use Value: Guaranteed function down to 1.2V VCC ensures reset assertion even during worst-case cranking; SOT23-3 footprint fits constrained under-hood layout. |
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 | Same SOT23-3, 2.2V threshold, but 2.5µA max ICC and no 1.2V operation guarantee | Lacks guaranteed sub-1.5V functionality; less suitable for deep-brownout recovery | Select MAX6326UR22-T when extended low-VCC operation or ultra-low ICC is required |
| TPS3808G01QDBVRQ1 | Automotive-grade (AEC-Q100), 2.19V threshold, 1.1µA ICC, but requires external pull-up for open-drain variant | Qualified for automotive use but uses open-drain output (different drive architecture) | Choose MAX6326UR22-T for non-automotive industrial/portable designs needing push-pull simplicity |
Compared with MAX809TRD2-T and TPS3808G01QDBVRQ1, the MAX6326UR22-T uniquely combines 1µA max ICC, guaranteed operation down to 1.2V, and push-pull active-low output in a standard SOT23-3-enabling simpler, lower-power, and more robust reset control in space-constrained embedded systems.
Availability
MAX6326UR22-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart energy meters, and automotive body control modules requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6326UR22-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, computing, communications, and consumer applications.
The MAX6326 family delivers ultra-low-power, factory-trimmed µP supervisory circuits targeting battery-operated and space-constrained embedded systems where reliability, small size, and minimal quiescent current are critical.
FAQ
What is the exact reset threshold voltage and tolerance for MAX6326UR22-T?
The MAX6326UR22-T has a factory-trimmed nominal reset threshold of 2.20V, with a tolerance of ±1.5% at +25°C and ±2.5% over the full operating temperature range of –40°C to +85°C. This specification is guaranteed by design and verified per the Electrical Characteristics table in the official datasheet.
Does MAX6326UR22-T require an external pull-up resistor on the RESET pin?
No, the MAX6326UR22-T features a push-pull active-low RESET output and does not require an external pull-up resistor. It actively drives the output low during reset assertion and high when released, simplifying interface with microprocessor reset inputs and reducing component count.
What is the minimum VCC voltage at which MAX6326UR22-T guarantees correct reset state?
The MAX6326UR22-T guarantees correct reset 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 maintain reset.
How long is the reset timeout period for MAX6326UR22-T after VCC rises above the threshold?
The MAX6326UR22-T provides a minimum reset timeout of 100ms after VCC rises above the 2.20V threshold. The typical timeout is 185ms, with a maximum of 280ms, ensuring sufficient time for microprocessors to complete power-on initialization sequences.
Is MAX6326UR22-T available in lead-free packaging?
Yes, MAX6326UR22-T is available in lead-free packaging. To order the lead-free version, replace the "-T" suffix with "+T", resulting in MAX6326UR22+T. Both versions use the same SOT23-3 package outline and land pattern.
MAX6326UR22-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:
- 2.2V
- 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
MAX6326UR22-T FAQ
1.How can I place an order for MAX6326UR22-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6326UR22-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 MAX6326UR22-T reliable?
The price and inventory of MAX6326UR22-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6326UR22-T is usually 5 days.
3.What payment methods are accepted for MAX6326UR22-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6326UR22-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6326UR22-T?
MAX6326UR22-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6326UR22-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 MAX6326UR22-T?
For technical support, including MAX6326UR22-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6326UR22-T requirements.
6.How does Aetrix verify that MAX6326UR22-T is sourced from the original manufacturer or authorized distributors?
All MAX6326UR22-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 MAX6326UR22-T meets industry standards.
7.What is the process for return or replacement of MAX6326UR22-T?
All MAX6326UR22-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6326UR22-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 MAX6326UR22-T part is unused and in its original packaging.
Return procedure for MAX6326UR22-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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