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Analog Devices Inc./Maxim Integrated MAX6326UR30+T
- Part No.:
- MAX6326UR30+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6326UR30+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,672
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Product details
Overview
MAX6326UR30+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 or power-up conditions. 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, 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 MAX6326UR30+T datasheet, MAX6326UR30+T pinout, MAX6326UR30+T application, or MAX6326UR30+T equivalent, key selection criteria include reset threshold accuracy over temperature, push-pull output drive capability, SOT23-3 package compatibility, and immunity to fast VCC transients - all critical for embedded µP power monitoring in space-constrained, low-power designs.
Technical Context
The MAX6326UR30+T implements a precision bandgap-based voltage comparator with hysteresis (6.3mV) to detect VCC drops below its 3.00V threshold. Its internal timing circuit guarantees a minimum 100ms reset pulse width after VCC recovers, independent of supply ramp rate.
It uses a push-pull output stage capable of sourcing ≥500µA at 0.8·VCC and sinking ≥1.6mA at ≤0.3V (VCC > 2.1V), eliminating external pull-up resistors. The device is fully specified from -40°C to +85°C and ignores transients <100µs at typical overdrive levels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.00V ±1.5% at +25°C; ensures accurate brownout detection for 3.0V systems |
| Reset Timeout | 100ms min after VCC rise; guarantees µP initialization completes before release |
| Supply Current | 1.0µA max at 3V; enables multi-year battery life in always-on monitoring |
| Operating VCC Range | 1.2V to 5.5V; supports operation during deep brownout and full supply range |
| Output Type | Active-low push-pull; drives RESET line directly without external pull-up |
| Tempco | 40ppm/°C; maintains threshold stability across industrial temperature range |
| Hysteresis | 6.3mV; prevents chatter near threshold during slow VCC recovery |
Pinout & Package
MAX6326UR30+T is housed in a 3-pin SOT23-3 package (JEDEC MO-178AA), footprint-compatible with industry-standard µP reset ICs. Pin 1 = GND, Pin 2 = RESET (active-low push-pull), Pin 3 = VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage |
| 2 | RESET | Active-low push-pull output; sinks ≥1.6mA or sources ≥500µA; no external pull-up needed |
| 3 | VCC | Supply input; powers internal circuitry and defines reset threshold reference |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1µA max enables use in coin-cell–powered IoT sensors with 10+ year shelf life |
| Factory-trimmed VTH | 3.00V threshold set at wafer level eliminates calibration and reduces BOM count |
| Transient immunity | Rejects VCC glitches <100µs duration, preventing spurious resets in noisy environments |
| No external components | Single-chip solution replaces discrete resistor-divider + comparator + timer circuits |
| Guaranteed state down to 1.2V | Ensures valid reset assertion even during severe brownout or battery depletion |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Wearable ECG patch operating from CR2032 coin cell with intermittent BLE transmission. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to ARM Cortex-M0 until regulated 3.0V rail stabilizes post-power-on and remains asserted during battery sag below 3.0V. Use Value: 1µA quiescent current extends battery life beyond 3 years; 100ms timeout ensures firmware bootloader executes fully before release. | Use Scenario: DIN-rail mounted analog input module powered from 24VDC-to-3.3V isolated converter subject to field wiring transients. IC Role / Device Role / Timing Role: Monitors local 3.0V logic supply and holds µC in reset during 24V line dips or EFT bursts that cause 3.0V rail collapse. Use Value: 40ppm/°C tempco and 6.3mV hysteresis prevent false resets across -25°C to +70°C cabinet temperatures; push-pull output drives long PCB traces reliably. |
| Smart Meter Data Loggers | Automotive Body Control Units |
Use Scenario: Battery-backed electricity meter storing time-stamped kWh data during grid outages. IC Role / Device Role / Timing Role: Detects drop of backup supercapacitor voltage below 3.0V and asserts RESET to halt writes and preserve flash integrity. Use Value: Guaranteed operation down to 1.2V VCC allows reset assertion even as supercap decays to end-of-life; SOT23-3 saves board area in sealed meter housing. | Use Scenario: Low-power door module with LIN transceiver and wake-on-RX functionality. IC Role / Device Role / Timing Role: Monitors 3.0V domain powering MCU and LIN PHY; asserts RESET during ignition cycling or load-dump-induced 3.0V droop. Use Value: Immunity to fast transients (<100µs) avoids reset during normal switching noise; -40°C to +85°C rating meets automotive under-hood requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TR30+T | Same 3.0V threshold, identical SOT23-3 pinout, but 2.5µA max ICC vs. 1µA | Lacks guaranteed operation below 1.8V VCC; not suitable for sub-1.8V brownout detection | Select when legacy design reuse is prioritized over lowest ICC |
| TPS3808G30DBVR | 3.0V threshold, 1.6µA max ICC, open-drain output (requires pull-up) | Open-drain architecture enables wired-OR reset bus; incompatible with direct push-pull drive | Select when system requires shared reset bus or higher sink current (20mA) |
Compared with MAX809TR30+T, MAX6326UR30+T delivers half the supply current and extended low-VCC operation; compared with TPS3808G30DBVR, it eliminates external pull-up components and simplifies layout, though forfeits wired-OR capability.
Availability
MAX6326UR30+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart meter data loggers, and automotive body control units requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.
Supply support for MAX6326UR30+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, interface, and reliability-critical applications.
The MAX6326 family is part of Maxim's ultra-low-power supervisory product line, engineered specifically for battery-operated and energy-sensitive embedded systems requiring precise, glitch-immune reset generation with minimal quiescent power.
FAQ
What is the exact reset threshold voltage and tolerance for MAX6326UR30+T?
The MAX6326UR30+T has a factory-trimmed nominal reset threshold of 3.00V, with a tolerance of ±1.5% at +25°C and ±2.5% over the full -40°C to +85°C operating temperature range. This specification is guaranteed by production test and documented in the Electrical Characteristics table of the official datasheet.
Does MAX6326UR30+T require an external pull-up resistor on the RESET pin?
No, MAX6326UR30+T does not require an external pull-up resistor because it features an active-low push-pull output stage. The RESET pin can both source and sink current, enabling direct connection to a microprocessor's reset input without additional components - a key differentiator from open-drain alternatives like the MAX6328UR30+T.
What is the minimum VCC voltage at which MAX6326UR30+T guarantees correct reset assertion?
MAX6326UR30+T guarantees correct reset assertion and output state validity down to VCC = 1.2V over the full -40°C to +85°C temperature range. This ensures reliable brownout detection even during deep battery discharge or severe power rail collapse, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics sections.
How long is the reset timeout period for MAX6326UR30+T, and is it adjustable?
The reset timeout period for MAX6326UR30+T is fixed at a minimum of 100ms after VCC rises above the reset threshold, with typical values ranging from 100ms to 280ms depending on temperature and unit variation. It is not user-adjustable - the timing is generated by an internal RC network optimized for µP initialization compliance and is guaranteed across voltage and temperature.
Is MAX6326UR30+T compatible with the same PCB footprint as MAX809 series devices?
Yes, MAX6326UR30+T uses the standard 3-pin SOT23-3 package (U3-1 outline) and shares identical pinout (GND–RESET–VCC) and land pattern with MAX809TR30+T and other industry-standard 3-pin reset supervisors, enabling drop-in replacement in existing layouts without PCB modification.
MAX6326UR30+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:
- 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:
- SOT-23-3
MAX6326UR30+T FAQ
1.How can I place an order for MAX6326UR30+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6326UR30+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 MAX6326UR30+T reliable?
The price and inventory of MAX6326UR30+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6326UR30+T is usually 5 days.
3.What payment methods are accepted for MAX6326UR30+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6326UR30+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6326UR30+T?
MAX6326UR30+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6326UR30+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 MAX6326UR30+T?
For technical support, including MAX6326UR30+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6326UR30+T requirements.
6.How does Aetrix verify that MAX6326UR30+T is sourced from the original manufacturer or authorized distributors?
All MAX6326UR30+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 MAX6326UR30+T meets industry standards.
7.What is the process for return or replacement of MAX6326UR30+T?
All MAX6326UR30+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6326UR30+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 MAX6326UR30+T part is unused and in its original packaging.
Return procedure for MAX6326UR30+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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