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Analog Devices Inc./Maxim Integrated MAX6326XR30+T
- Part No.:
- MAX6326XR30+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6326XR30+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:619
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Product details
Overview
MAX6326XR30+T from Maxim Integrated is an ultra-low-power, active-low push-pull microprocessor supervisory circuit designed to monitor 3.0V power supplies and assert a reset signal during brownout, power-up, or power-down events. It features a factory-trimmed 3.00V reset threshold (±1.5% at +25°C, ±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 power-on reset functionality.
For engineers reviewing the MAX6326XR30+T datasheet, MAX6326XR30+T pinout, MAX6326XR30+T application, or MAX6326XR30+T equivalent, key selection considerations include its SC70-3 package, push-pull active-low RESET output, guaranteed reset assertion down to 1.2V VCC, immunity to fast VCC transients, and compatibility with 3.0V µP systems requiring precise voltage monitoring without external components.
Technical Context
The MAX6326XR30+T integrates a precision bandgap-based reset comparator with built-in hysteresis (6.3mV) and a 100ms internal timer to guarantee minimum reset pulse width. Its reset threshold is factory-trimmed to 3.00V and specified across -40°C to +85°C with ±2.5% tolerance and 40ppm/°C tempco.
It uses a push-pull output stage capable of sourcing ≥500µA at 0.8·VCC and sinking ≥1.6mA at ≤0.3V, eliminating need for external pull-up resistors. The device ignores VCC transients <20µs at 100mV overdrive, ensuring robust operation in noisy power environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.00V ±1.5% (25°C), ±2.5% (-40°C to +85°C); ensures accurate 3.0V system reset initiation |
| Supply Current | 1.0µA max at 3V; enables multi-year battery life in portable equipment |
| Reset Timeout | 100ms min power-up delay; guarantees µP initialization completes before release |
| VCC Operating Range | 1.2V to 5.5V; supports valid reset assertion even during deep brownout conditions |
| Output Type | Active-low push-pull; drives RESET directly without external pull-up resistor |
| Tempco | 40ppm/°C; maintains tight threshold stability across industrial temperature range |
| Transient Immunity | Rejects VCC glitches <20µs at 100mV overdrive; prevents false resets in noisy rails |
Pinout & Package
MAX6326XR30+T is housed in a 3-pin SC70-3 package (outline X3-2), footprint-compatible with SOT23-3 but with smaller 1.25mm × 1.65mm body and 0.65mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for reset comparator and output driver; must be low-impedance |
| 2 | RESET | Active-low push-pull output; sinks ≥1.6mA when asserted, sources ≥500µA when released |
| 3 | VCC | Supply input; powers internal circuitry and defines reset threshold reference point |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 1µA supply current | Extends battery life in always-on portable devices without compromising reset reliability |
| Factory-trimmed 3.00V threshold | Eliminates external resistor networks and calibration; ensures consistent 3.0V system compatibility |
| 100ms minimum reset timeout | Guarantees sufficient hold time for slow-starting µPs and peripheral initialization sequences |
| Push-pull active-low output | Drives standard µP reset pins directly-no external pull-up required, reducing BOM count |
| VCC transient immunity | Suppresses false resets from sub-20µs power rail noise, improving system robustness |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Wearable ECG monitors powered by coin-cell batteries requiring multi-year runtime and guaranteed boot integrity after battery insertion or voltage sag. IC Role / Device Role / Timing Role: Power-on reset supervisor asserting active-low RESET until 3.0V rail stabilizes and holds for ≥100ms. Use Value: 1µA quiescent current preserves battery capacity; 3.00V threshold matches LiMnO₂ nominal voltage; SC70-3 footprint saves space on compact sensor PCBs. |
Use Scenario: DIN-rail mounted I/O modules exposed to 24VDC field wiring with high EMI and voltage transients. IC Role / Device Role / Timing Role: Brownout detector that asserts RESET during 3.0V logic rail collapse caused by load switching or cable inductance. Use Value: 40ppm/°C tempco ensures stable trip point across -40°C to +85°C ambient; transient immunity rejects spikes induced by relay coil flyback. |
| Smart Meter Communication Units | Low-Power IoT Edge Nodes |
Use Scenario: NB-IoT modem subsystems in electricity meters that wake periodically and require deterministic reset after cold start or brownout. IC Role / Device Role / Timing Role: Supervisory circuit monitoring dedicated 3.0V LDO output powering RF SoC and memory. Use Value: Guaranteed operation down to 1.2V VCC allows reset assertion even during severe brownout; push-pull output interfaces directly with SoC's bidirectional reset pin. |
Use Scenario: Battery-powered environmental sensors using ultra-low-power MCUs (e.g., MSP430, nRF52) that enter deep sleep between readings. IC Role / Device Role / Timing Role: System-level reset generator ensuring clean MCU boot after wake-from-sleep voltage recovery. Use Value: SC70-3 package fits dense sensor node layouts; 1µA ICC minimizes impact on sleep-mode current budget; 3.00V threshold aligns with common 3.0V regulator outputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TR30+T | Same 3.0V threshold, identical SC70-3 package, but 2.0µA max ICC and no guaranteed operation below 1.5V VCC | Lacks deep-brownout support; unsuitable where VCC may dip below 1.5V during power failure | Select MAX809TR30+T only if 2µA supply current is acceptable and brownout voltage never falls below 1.5V |
| TPS3808G30DBVR | 3.0V threshold, SOT23-3 package, but 1.8µA max ICC and requires external capacitor for adjustable timeout (default 200ms) | Higher quiescent current and larger footprint; timeout not fixed internally | Choose TPS3808G30DBVR only if longer reset pulse or adjustable timeout is required and SC70 size is not critical |
Compared with MAX809TR30+T and TPS3808G30DBVR, the MAX6326XR30+T delivers superior deep-brownout resilience (1.2V operation), lowest ICC (1µA), and fixed 100ms timeout in the smallest SC70-3 footprint-making it optimal for space-constrained, battery-critical 3.0V systems.
Availability
MAX6326XR30+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart meter communication units, and low-power IoT edge nodes requiring stable component supply, long-lifecycle availability, and RoHS-compliant packaging.
Supply support for MAX6326XR30+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) is a semiconductor company specializing in analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX6326 family was designed specifically for ultra-low-power microprocessor reset supervision in battery-operated and space-constrained systems, emphasizing precision voltage monitoring, minimal quiescent current, and robust transient immunity.
FAQ
What is the exact reset threshold voltage of the MAX6326XR30+T?
The MAX6326XR30+T has a factory-trimmed nominal reset threshold of 3.00V, with ±1.5% tolerance at +25°C and ±2.5% tolerance over the full -40°C to +85°C operating temperature range. This value is confirmed in Table 1 of the official datasheet and applies specifically to the "R30" suffix variant of the MAX6326XR30+T.
Does the MAX6326XR30+T require an external pull-up resistor on its RESET pin?
No, the MAX6326XR30+T does not require an external pull-up resistor because it features an active-low push-pull RESET output. The output actively drives low during reset assertion and actively drives high (to ≥0.8·VCC) when released, enabling direct connection to standard µP reset inputs without additional components.
What is the minimum VCC voltage at which the MAX6326XR30+T guarantees correct reset state?
The MAX6326XR30+T guarantees correct reset state-i.e., RESET remains asserted while VCC is below threshold and releases only after VCC rises above threshold-for VCC down to 1.2V over the full -40°C to +85°C temperature range. This deep-brownout capability is explicitly specified in the Electrical Characteristics table.
How does the MAX6326XR30+T handle short voltage transients on the VCC line?
The MAX6326XR30+T incorporates internal circuitry to ignore fast negative-going VCC transients; it suppresses reset pulses for glitches shorter than 20µs when the overdrive (VTH − VCC) is 100mV. This transient immunity is documented in the Typical Operating Characteristics graph "Maximum Transient Duration vs. Reset Threshold Overdrive".
Is the MAX6326XR30+T pin-compatible with other members of the MAX6326 family?
Yes, the MAX6326XR30+T shares identical SC70-3 pinout and pin functions with all MAX6326XRxx+T variants (e.g., MAX6326XR22+T, MAX6326XR31+T), as well as with MAX6326URxx-T in SOT23-3. Pin compatibility extends to MAX803/MAX809/MAX810 families per the datasheet Selector Guide.
MAX6326XR30+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:
- 3V
- 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
MAX6326XR30+T FAQ
1.How can I place an order for MAX6326XR30+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6326XR30+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 MAX6326XR30+T reliable?
The price and inventory of MAX6326XR30+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6326XR30+T is usually 5 days.
3.What payment methods are accepted for MAX6326XR30+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6326XR30+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6326XR30+T?
MAX6326XR30+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6326XR30+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 MAX6326XR30+T?
For technical support, including MAX6326XR30+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6326XR30+T requirements.
6.How does Aetrix verify that MAX6326XR30+T is sourced from the original manufacturer or authorized distributors?
All MAX6326XR30+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 MAX6326XR30+T meets industry standards.
7.What is the process for return or replacement of MAX6326XR30+T?
All MAX6326XR30+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6326XR30+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 MAX6326XR30+T part is unused and in its original packaging.
Return procedure for MAX6326XR30+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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