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Analog Devices Inc./Maxim Integrated MAX6326XR22+T
- Part No.:
- MAX6326XR22+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6326XR22+T.pdf
- Description:
- IC MPU/RESET CIRC 2.20V SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,572
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Product details
Overview
MAX6326XR22+T from Maxim Integrated is an ultra-low-power, active-low push-pull microprocessor supervisory circuit that monitors VCC supply voltage and asserts a reset signal when voltage falls below 2.20V (±2.5% over temperature), maintaining reset for ≥100ms after recovery. It operates from 1.2V to 5.5V, draws ≤1.0µA at 3V, and is housed in a 3-pin SC70 package. It serves as a primary power-on/brownout reset generator in battery-powered µP systems.
For engineers reviewing the MAX6326XR22+T datasheet, MAX6326XR22+T pinout, MAX6326XR22+T application, or MAX6326XR22+T equivalent, key selection criteria include its factory-trimmed 2.20V reset threshold, 100ms minimum reset timeout, push-pull active-low output, SC70-3 footprint, and guaranteed operation down to 1.2V VCC - critical for portable and low-voltage embedded designs.
Technical Context
The MAX6326XR22+T implements a precision bandgap-based reset comparator with 40ppm/°C tempco and 6.3mV hysteresis, ensuring stable threshold behavior across -40°C to +85°C. Its internal circuitry eliminates external components and rejects fast VCC transients up to 100V/µs slew rate.
It features a push-pull RESET output capable of sourcing ≥500µA at 0.8·VCC and sinking ≥1.6mA at ≤0.3V, enabling direct interface with µP reset inputs without pull-up resistors. The device remains fully functional with VCC as low as 1.2V, and its reset assertion is guaranteed even during deep brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.20V ±2.5% over -40°C to +85°C - ensures reliable brownout detection at nominal 2.2V supply rails |
| Supply Current | ≤1.0µA at 3V - enables multi-year battery life in always-on portable monitoring systems |
| Reset Timeout | 100ms to 280ms - guarantees sufficient processor initialization time after power stabilization |
| VCC Operating Range | 1.2V to 5.5V - supports operation across legacy 5V, modern 3.3V/2.5V, and ultra-low-voltage 1.2V logic domains |
| Output Type | Active-low push-pull - drives reset line directly without external pull-up, reducing BOM count and layout area |
| Package | SC70-3 (3-pin) - 2.0mm × 2.1mm footprint ideal for space-constrained portable PCBs |
| Reset Hysteresis | 6.3mV - prevents oscillatory reset assertion near threshold during noisy or slowly recovering supplies |
Pinout & Package
MAX6326XR22+T is packaged in a 3-pin SC70 (X3-2 outline), with 0.65mm lead pitch and exposed pad not present. The package is RoHS-compliant and rated for 174mW continuous dissipation at +70°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal comparator and output driver; must be connected to system ground plane for noise immunity |
| 2 (RESET) | Active-low push-pull reset output | Drives low during VCC undervoltage or brownout; actively pulls high when reset is inactive - no external pull-up required |
| 3 (VCC) | Supply input | Power source for internal circuitry; accepts 1.2V–5.5V; internally monitored for reset generation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 1µA max supply current | Enables integration into energy-harvesting and coin-cell-powered devices without compromising battery lifetime |
| Factory-trimmed 2.20V reset threshold | Eliminates need for external resistor dividers or calibration; reduces design cycle time and test overhead |
| 100ms minimum reset pulse width | Guarantees full µP core and peripheral initialization before release, preventing boot failures in complex SoCs |
| Push-pull active-low output | Provides bidirectional drive strength (sink/source) for robust interfacing with diverse µP reset input architectures |
| VCC transient immunity | Rejects glitches up to 100V/µs dV/dt - avoids spurious resets during switching noise or ESD events |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Wearable ECG patch continuously monitors heart rhythm on a single CR2032 coin cell. IC Role / Device Role / Timing Role: Primary power-on and brownout reset supervisor ensuring clean µC boot after battery insertion or voltage sag. Use Value: 1µA quiescent current extends operational life beyond 2 years; 2.20V threshold matches LiMnO₂ battery discharge profile. |
Use Scenario: DIN-rail mounted analog input module operates in factory environments with fluctuating 24VDC supply. IC Role / Device Role / Timing Role: Resets field-programmable gate array (FPGA) and ADC controller upon 24V rail dip below 22V. Use Value: 100ms reset timeout accommodates slow industrial power supply recovery; SC70 package fits dense I/O board layout. |
| Smart Meter Communication Units | Automotive Body Control Modules |
Use Scenario: NB-IoT cellular modem in electricity meter powers up only during scheduled data transmission bursts. IC Role / Device Role / Timing Role: Ensures deterministic µP reset timing each time the buck converter powers the RF subsystem. Use Value: Push-pull output eliminates need for external pull-up resistor, reducing component count and leakage paths in sleep mode. |
Use Scenario: Door module with LIN transceiver and EEPROM retains configuration during vehicle battery disconnect/reconnect cycles. IC Role / Device Role / Timing Role: Generates clean reset pulse when 12V battery recovers from cranking dip (down to ~9V). Use Value: Guaranteed operation down to 1.2V VCC allows supervision even during severe brownout; -40°C to +85°C rating meets automotive AEC-Q100 ambient requirements. |
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 SC70-3 package, 2.16V reset threshold (±2.5%), 1.6µA max ICC, push-pull active-low output | Slightly lower threshold; higher supply current limits use in ultra-low-power designs | Select when 2.16V trip point better matches 2.1V LDO output or legacy system spec |
| TPS3808G12QDBVRQ1 | Adjustable threshold via external resistor; 2.5µA max ICC; open-drain output; automotive-grade (-40°C to +125°C) | Requires external resistor network; lacks push-pull drive; wider temp range but larger SOT23-6 footprint | Choose for AEC-Q100 qualified designs needing adjustable reset voltage or extended temperature operation |
Compared with MAX6326XR22+T, MAX809TRD2+T offers marginally tighter threshold tolerance but higher quiescent current, while TPS3808G12QDBVRQ1 provides automotive qualification and adjustability at the cost of added components and reduced integration density.
Availability
MAX6326XR22+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, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6326XR22+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, communications, computing, and consumer applications.
The MAX6326 family delivers ultra-low-power, factory-trimmed µP supervisory circuits optimized for 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 of MAX6326XR22+T and how does it vary with temperature?
The MAX6326XR22+T has a factory-trimmed nominal reset threshold of 2.20V at +25°C, with guaranteed tolerance of ±2.5% over the full operating range of -40°C to +85°C. Its temperature coefficient is 40ppm/°C, meaning threshold drift is limited to approximately ±0.9mV per °C change - ensuring predictable brownout behavior across industrial environments. This specification is verified per the Electrical Characteristics table in the official MAX6326 datasheet.
Does MAX6326XR22+T require any external components to function as a reset supervisor?
No, the MAX6326XR22+T requires zero external components to perform its core reset supervision function. Its precision bandgap reference, comparator, and push-pull output driver are fully integrated. Unlike adjustable supervisors, it needs no external resistors or capacitors - simplifying layout, reducing BOM cost, and improving reliability. Only standard decoupling (e.g., 0.1µF ceramic capacitor between VCC and GND) is recommended for noise suppression.
Can MAX6326XR22+T operate reliably when VCC drops below 2.2V?
Yes, the MAX6326XR22+T is fully specified to operate down to VCC = 1.2V over temperature, and its reset output remains valid and asserted until VCC rises above the 2.20V threshold plus hysteresis. Even at 1.2V, the internal circuitry maintains correct state - a key feature enabling robust brownout detection in systems with steeply discharging batteries or unregulated supplies.
What is the maximum transient rejection capability of MAX6326XR22+T on the VCC line?
The MAX6326XR22+T is designed to ignore fast negative-going transients on VCC, with a specified maximum slew rate immunity of 100V/µs. Its internal comparator incorporates filtering to suppress glitches shorter than ~100ns to several microseconds depending on overdrive magnitude - as shown in the "Maximum Transient Duration vs. Reset Threshold Overdrive" graph in the datasheet. This prevents false resets during switching regulator noise or ESD-induced supply disturbances.
Is MAX6326XR22+T pin-compatible with other members of the MAX6326/MAX6327/MAX6328 family?
Yes, all SC70-3 variants in the MAX6326/MAX6327/MAX6328 series - including MAX6326XR22+T - share identical pinout (GND, RESET, VCC), package dimensions, and footprint. The only functional differences are reset threshold voltage and output polarity (MAX6326/MAX6346 = active-low push-pull; MAX6327/MAX6347 = active-high push-pull; MAX6328/MAX6348 = active-low open-drain). This allows drop-in replacement within the same output-type group when threshold adjustment is acceptable.
MAX6326XR22+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- SC-70-3
MAX6326XR22+T FAQ
1.How can I place an order for MAX6326XR22+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6326XR22+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 MAX6326XR22+T reliable?
The price and inventory of MAX6326XR22+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6326XR22+T is usually 5 days.
3.What payment methods are accepted for MAX6326XR22+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6326XR22+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6326XR22+T?
MAX6326XR22+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6326XR22+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 MAX6326XR22+T?
For technical support, including MAX6326XR22+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6326XR22+T requirements.
6.How does Aetrix verify that MAX6326XR22+T is sourced from the original manufacturer or authorized distributors?
All MAX6326XR22+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 MAX6326XR22+T meets industry standards.
7.What is the process for return or replacement of MAX6326XR22+T?
All MAX6326XR22+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6326XR22+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 MAX6326XR22+T part is unused and in its original packaging.
Return procedure for MAX6326XR22+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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