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Analog Devices Inc./Maxim Integrated MAX6326XR24+T
- Part No.:
- MAX6326XR24+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6326XR24+T.pdf
- Description:
- IC MPU/RESET CIRC 2.40V SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,374
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Product details
Overview
MAX6326XR24+T from Maxim Integrated is an ultra-low-power, active-low push-pull microprocessor supervisory circuit designed to monitor 2.4V power supplies and assert a reset signal during brownout or power-up conditions. It features a factory-trimmed 2.400V reset threshold (±1.5% at +25°C, ±2.5% over -40°C to +85°C), 100ms minimum reset timeout, 1µA maximum supply current at 3V, and operates down to 1.2V VCC. It is used in portable battery-powered systems requiring reliable power-on reset and brownout protection.
For engineers reviewing the MAX6326XR24+T datasheet, MAX6326XR24+T pinout, MAX6326XR24+T application, or MAX6326XR24+T equivalent, this page delivers verified electrical parameters, SC70-3 package details, reset timing behavior, transient immunity specs, and validated alternative parts for µP reset circuit design and BOM optimization.
Technical Context
The MAX6326XR24+T implements a precision bandgap-based voltage comparator with hysteresis (6.3mV) to detect VCC falling below its 2.400V threshold. Its internal timer guarantees a minimum 100ms reset assertion after VCC rises above threshold, 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 ignores fast VCC transients - up to 200µs for 100mV overdrive - ensuring glitch immunity in noisy environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.400V ±1.5% (25°C); ±2.5% (-40°C to +85°C) - ensures accurate 2.4V supply monitoring with guaranteed margin against false triggers |
| Supply Current | 1.0µA max at 3V - enables multi-year operation in coin-cell–powered devices without compromising reset reliability |
| Reset Timeout | 100ms min (185ms typ, 280ms max) - meets JEDEC JESD84-B51 power-up reset duration requirements for embedded µPs |
| Output Type | Active-low push-pull - drives RESET low directly; no external pull-up required; compatible with standard µP reset inputs |
| VCC Operating Range | 1.2V to 5.5V - supports operation during deep brownout and full-voltage system states |
| Reset Hysteresis | 6.3mV - prevents oscillation near threshold during slow VCC recovery |
| Transient Immunity | Immune to ≤200µs negative VCC glitches at 100mV overdrive - suppresses noise-induced spurious resets |
Pinout & Package
MAX6326XR24+T is housed in a 3-pin SC70-3 package (outline 21-0075, land pattern 90-0208), measuring 2.0mm × 2.1mm × 0.95mm, with gull-wing leads and RoHS-compliant lead-free finish (+T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output driver; must be connected to system ground plane for stable reset timing |
| 2 | RESET | Active-low push-pull output; asserts logic-low reset signal to µP during VCC fault; sinks ≥1.6mA, sources ≥500µA |
| 3 | VCC | Power input (1.2V–5.5V); supplies internal circuitry and defines reset threshold reference; decoupling capacitor required |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1µA max at 3V - extends battery life in wearables and remote sensors without sacrificing supervision accuracy |
| Precision VTH | 2.400V ±1.5% at 25°C - eliminates need for external resistor dividers or trimming in 2.4V rail monitoring |
| No external components | Self-contained reset generator - reduces BOM count, PCB area, and qualification effort vs. discrete solutions |
| Guaranteed state down to 1V | Valid reset assertion even as VCC collapses to 1.2V - ensures µP remains held in reset until full power recovery |
| SC70-3 footprint | 2.0mm × 2.1mm outline - enables high-density placement in space-constrained IoT edge nodes and handheld devices |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Battery-powered glucose meters and pulse oximeters operating on single-cell Li-ion or alkaline supplies. IC Role / Device Role / Timing Role: Monitors 2.4V regulated rail derived from buck converter; asserts reset during battery sag or cold-start conditions. Use Value: Prevents firmware corruption by guaranteeing ≥100ms reset hold time while VCC stabilizes, meeting ISO 13485 functional safety expectations for medical startup integrity. |
Use Scenario: DIN-rail mounted I/O modules exposed to wide ambient temperature swings and EMI-rich factory floors. IC Role / Device Role / Timing Role: Supervises 2.4V auxiliary supply feeding FPGA configuration memory and analog front-end bias rails. Use Value: 6.3mV hysteresis and 200µs transient immunity prevent nuisance resets caused by switching noise on shared 24V DC bus, improving system uptime. |
| Smart Meter Communication Units | Asset Tracking Beacons |
|
Use Scenario: NB-IoT or LTE-M cellular modems in electricity/water meters powered by primary lithium batteries. IC Role / Device Role / Timing Role: Resets modem SoC when 2.4V LDO output drops due to battery aging or load surge during RF transmission. Use Value: 1µA max ICC minimizes quiescent drain, extending 10-year battery life; factory-trimmed 2.400V threshold matches exact LDO spec without calibration. |
Use Scenario: GPS-enabled BLE beacons deployed in logistics containers with intermittent solar charging and wide thermal cycling. IC Role / Device Role / Timing Role: Ensures clean boot of ARM Cortex-M0+ MCU after cold start at -40°C or hot restart at +85°C. Use Value: Guaranteed operation from 1.2V VCC and ±2.5% threshold tolerance across full temperature range eliminate boot failures in extreme environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TR24+T | Same SC70-3 package, identical 2.4V threshold (±2%), but 2.5µA max ICC and no guaranteed 1V operation | Lacks deep-brownout support; suitable only where VCC never falls below 1.8V | Select when lower cost is critical and system VCC stays >1.8V; avoid for battery-dead scenarios |
| TPS3808G12QDBVRQ1 | Automotive-grade (AEC-Q100), 2.43V threshold (±0.5%), 1.6µA ICC, but SOT23-3 only - not SC70-3 pinout compatible | Requires PCB redesign; adds automotive qualification overhead | Choose only for automotive programs needing AEC-Q100 certification; not drop-in for MAX6326XR24+T layout |
Compared with MAX809TR24+T and TPS3808G12QDBVRQ1, the MAX6326XR24+T uniquely combines ultra-low 1µA ICC, guaranteed 1.2V operation, SC70-3 footprint, and precise 2.400V threshold - making it optimal for long-life, space-constrained, wide-VCC-range portable electronics where reset reliability cannot be compromised.
Availability
MAX6326XR24+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart meter communication units, and asset tracking beacons requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6326XR24+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 and mixed-signal ICs for power management, sensing, and interface applications, serving industrial, medical, and communications markets.
The MAX6326 family delivers ultra-low-power, factory-trimmed µP reset supervisors targeting battery-operated and space-constrained systems where supply monitoring accuracy and minimal quiescent current are critical.
FAQ
What is the exact reset threshold voltage of MAX6326XR24+T and how tightly is it specified?
The MAX6326XR24+T has a factory-trimmed nominal reset threshold of 2.400V. At +25°C, this is guaranteed within ±1.5% (2.364V to 2.436V). Over the full operating temperature range of -40°C to +85°C, the threshold remains within ±2.5% (2.340V to 2.460V). This tight specification eliminates the need for external calibration in 2.4V supply monitoring applications.
Does MAX6326XR24+T require an external pull-up resistor on its RESET pin?
No, MAX6326XR24+T does not require an external pull-up resistor. It features a push-pull output stage that actively drives the RESET pin low during fault conditions and high during normal operation. The output can source ≥500µA at 0.8·VCC and sink ≥1.6mA at ≤0.3V, enabling direct connection to standard µP reset inputs without additional components.
Can MAX6326XR24+T operate reliably when VCC drops below 2.0V?
Yes, MAX6326XR24+T is fully specified to operate down to VCC = 1.2V over temperature and guarantees correct reset state (asserted or de-asserted) for VCC as low as 1.0V. This makes it suitable for deep brownout detection and ensures the connected microprocessor remains held in reset until the supply recovers sufficiently - a key requirement in battery-depleted scenarios.
What is the minimum reset pulse width guaranteed by MAX6326XR24+T?
MAX6326XR24+T guarantees a minimum reset pulse width of 100ms after VCC rises above the reset threshold. Typical duration is 185ms, with a maximum of 280ms. This extended timeout satisfies JEDEC and industry-standard power-on reset timing requirements for most microprocessors and microcontrollers, preventing premature release from reset during supply ramp-up.
Is MAX6326XR24+T pin-compatible with other members of the MAX6326 family?
Yes, MAX6326XR24+T is pin-compatible with all SC70-3 packaged variants of the MAX6326/MAX6327/MAX6328 families, including MAX6326XRxx+T, MAX6327XRxx+T, and MAX6328XRxx+T. All share identical 3-pin SC70-3 pinout (VCC, RESET, GND), enabling footprint reuse across different reset thresholds and output types - simplifying design flexibility and inventory management.
MAX6326XR24+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.4V
- 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
MAX6326XR24+T FAQ
1.How can I place an order for MAX6326XR24+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6326XR24+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 MAX6326XR24+T reliable?
The price and inventory of MAX6326XR24+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6326XR24+T is usually 5 days.
3.What payment methods are accepted for MAX6326XR24+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6326XR24+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6326XR24+T?
MAX6326XR24+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6326XR24+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 MAX6326XR24+T?
For technical support, including MAX6326XR24+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6326XR24+T requirements.
6.How does Aetrix verify that MAX6326XR24+T is sourced from the original manufacturer or authorized distributors?
All MAX6326XR24+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 MAX6326XR24+T meets industry standards.
7.What is the process for return or replacement of MAX6326XR24+T?
All MAX6326XR24+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6326XR24+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 MAX6326XR24+T part is unused and in its original packaging.
Return procedure for MAX6326XR24+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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