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Analog Devices Inc./Maxim Integrated MAX6326XR24
- Part No.:
- MAX6326XR24
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6326XR24.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,360
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Product details
Overview
MAX6326XR24 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 max supply current at 3V, and operates down to 1.2V VCC. It is used in portable battery-powered systems requiring reliable power-on reset functionality.
For engineers reviewing the MAX6326XR24 datasheet, MAX6326XR24 pinout, MAX6326XR24 application, or MAX6326XR24 equivalent, key selection considerations include its SC70-3 package, push-pull active-low RESET output, 2.4V threshold accuracy over temperature, transient immunity, and compatibility with 2.5V/3V/3.3V/5V digital systems.
Technical Context
The MAX6326XR24 integrates a precision voltage comparator with hysteresis (6.3mV) and an internal timer to guarantee ≥100ms reset assertion after VCC rises above the 2.400V threshold. Its reset logic remains valid down to VCC = 1.2V, ensuring correct state retention during deep brownout.
Designed for immunity to fast VCC transients, it ignores negative-going glitches shorter than ~100µs at 200mV overdrive, and exhibits only 40ppm/°C reset threshold tempco. The push-pull output drives low (≤0.3V at 1.6mA) when asserted and high (≥0.8·VCC) when released.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.400V ±1.5% at +25°C; ensures precise 2.4V supply monitoring with guaranteed trip point across full industrial temperature range |
| Supply Current | 1.0µA max at 3V; enables multi-year operation in coin-cell–powered devices without compromising reset reliability |
| Reset Timeout | 100ms min power-up delay; satisfies µP reset timing requirements for stable clock and memory initialization |
| VCC Operating Range | 1.2V to 5.5V; supports operation during deep undervoltage while maintaining valid reset state |
| Output Type | Active-low push-pull; eliminates need for external pull-up resistor and provides strong drive into heavy capacitive loads |
| Threshold Tempco | 40ppm/°C; limits drift to <±15mV over –40°C to +85°C, critical for stable reset behavior in thermal cycling environments |
| Reset Hysteresis | 6.3mV; prevents chatter near threshold during slow-rising/falling VCC transitions |
Pinout & Package
MAX6326XR24 is housed in a 3-pin SC70-3 package (outline X3-2), footprint-compatible with SOT23-3 but with smaller 1.25mm × 0.85mm body and 0.65mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - GND | Ground reference | Return path for internal comparator and output driver; must be connected directly to system ground plane |
| 2 - RESET | Active-low push-pull reset output | Drives low (≤0.3V @ 1.6mA) during reset; drives high (≥0.8·VCC) otherwise; interfaces directly with µP reset input without pull-up |
| 3 - VCC | Supply voltage input | Monitored power rail input; accepts 1.2V–5.5V; internally powers comparator, timer, and output stage |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1µA max enables >10-year battery life in always-on IoT sensors and wearables |
| Precision 2.4V threshold | Factory-trimmed to 2.400V ±1.5% at +25°C ensures accurate detection of 2.4V supply faults |
| 100ms min reset pulse | Guarantees sufficient hold time for ARM Cortex-M and RISC-V MCU boot sequence completion |
| VCC down to 1.2V operation | Maintains valid reset assertion even during severe brownout, preventing undefined µP execution |
| Transient immunity | Rejects VCC glitches <100µs wide at 200mV overdrive, eliminating false resets in noisy power environments |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Wearable ECG patch powered by CR2032 coin cell with intermittent BLE transmission. IC Role / Device Role / Timing Role: Supervises 2.4V LDO output; asserts RESET until regulated rail stabilizes post-battery insertion or wake-up. Use Value: 1µA quiescent current extends battery life beyond 3 years; 2.4V threshold matches sensor analog front-end supply tolerance. |
Use Scenario: DIN-rail mounted I/O module operating from 24VDC converted to 3.3V/2.4V rails in factory automation. IC Role / Device Role / Timing Role: Monitors 2.4V auxiliary rail powering isolated ADC reference; holds µC in reset during 24V input transients. Use Value: 100ms timeout prevents spurious reboots during brief line sags; SC70-3 footprint saves space on dense PCBs. |
| Smart Meter Battery Backup | Automotive Body Control Unit (BCU) |
|
Use Scenario: Electricity meter with supercapacitor backup maintaining real-time clock and firmware state during AC loss. IC Role / Device Role / Timing Role: Watches 2.4V backup regulator; triggers controlled shutdown and nonvolatile save before VCC drops below safe level. Use Value: Operation down to 1.2V allows graceful shutdown even as supercap decays; 40ppm/°C tempco ensures accuracy across outdoor temperature swings. |
Use Scenario: Low-voltage BCU subsystem powered from vehicle's 12V battery via 2.4V LDO, subject to load-dump and cold-crank events. IC Role / Device Role / Timing Role: Resets microcontroller during cold-crank (VCC dip to ~2.2V); ignores sub-100µs noise from alternator switching. Use Value: 6.3mV hysteresis prevents oscillation near 2.4V threshold during slow battery recovery; push-pull output drives automotive-grade reset inputs directly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TR24D3T1G | Same 2.4V threshold, SOT23-3 package, but 1.6µA max ICC and no guaranteed operation below 1.5V VCC | Lacks deep-brownout support; unsuitable for systems requiring reset assertion below 1.5V | Select MAX6326XR24 when VCC may fall below 1.5V or ultra-low ICC (<1µA) is mandatory |
| TPS3808G125DBVR | 2.43V threshold, 1.8µA ICC, supports 0.8V–6V VCC, but requires external capacitor for timeout adjustment | Timeout not fixed; design requires layout area and BOM addition for timing cap | Choose MAX6326XR24 for fixed 100ms timeout, zero external components, and smallest possible footprint |
Compared with MAX809TR24D3T1G and TPS3808G125DBVR, MAX6326XR24 delivers superior deep-brownout resilience (down to 1.2V), lowest ICC (1µA), and fully integrated timing-enabling simpler, more robust reset architecture in space-constrained, battery-sensitive designs.
Availability
MAX6326XR24 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart meter battery backup circuits, and automotive body control units requiring stable component supply and long-term lifecycle assurance.
Supply support for MAX6326XR24 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 high-performance analog, mixed-signal, and power-management ICs for industrial, computing, and communications applications.
The MAX6326 family is part of Maxim's ultra-low-power supervisory product line, engineered specifically for reliable power-on reset and brownout protection in battery-powered and thermally demanding embedded systems.
FAQ
What is the exact reset threshold voltage of MAX6326XR24 and how tightly is it specified?
The MAX6326XR24 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 industrial temperature range (–40°C to +85°C), the threshold remains within ±2.5% (2.340V to 2.460V), as confirmed in the Electrical Characteristics table. This precision eliminates need for external calibration in 2.4V system monitoring.
Does MAX6326XR24 require any external components to function?
No, MAX6326XR24 requires zero external components. Its 100ms reset timeout is fully internal, and the push-pull RESET output drives directly into the microprocessor's reset pin without needing a pull-up resistor. This simplifies layout, reduces BOM count, and improves reliability compared to solutions requiring timing capacitors or bias resistors.
Can MAX6326XR24 operate reliably when the supply voltage drops below 2.0V?
Yes, MAX6326XR24 is fully specified down to VCC = 1.2V across –40°C to +85°C. Its internal circuitry maintains correct reset assertion state even at 1.2V, and the RESET output remains functional (low ≤0.4V at 100µA sink) - enabling controlled shutdown in deep brownout scenarios where other supervisors fail.
What package type and footprint does MAX6326XR24 use, and is it compatible with automated assembly?
MAX6326XR24 uses the 3-pin SC70-3 package (outline X3-2), measuring 1.25mm × 0.85mm with 0.65mm lead pitch. It is supplied in tape-and-reel format and is fully compatible with standard SMT pick-and-place equipment and reflow profiles. Land pattern 90-0208 is recommended per Maxim's package documentation.
How does MAX6326XR24 handle short voltage transients on the VCC line?
MAX6326XR24 incorporates built-in transient immunity: its reset comparator ignores fast negative-going VCC glitches shorter than ~100µs when overdriven by 200mV. This prevents false resets caused by switching noise or coupling spikes, as verified in the "Maximum Transient Duration vs. Reset Threshold Overdrive" graph in the datasheet.
MAX6326XR24 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 FAQ
1.How can I place an order for MAX6326XR24 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6326XR24 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 reliable?
The price and inventory of MAX6326XR24 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6326XR24 is usually 5 days.
3.What payment methods are accepted for MAX6326XR24?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6326XR24 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6326XR24?
MAX6326XR24 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6326XR24 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?
For technical support, including MAX6326XR24 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6326XR24 requirements.
6.How does Aetrix verify that MAX6326XR24 is sourced from the original manufacturer or authorized distributors?
All MAX6326XR24 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 meets industry standards.
7.What is the process for return or replacement of MAX6326XR24?
All MAX6326XR24 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6326XR24, 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 part is unused and in its original packaging.
Return procedure for MAX6326XR24:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6326XR24 Tags
-
MIC826SYMT-TR
Microchip Technology
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APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
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TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
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MCP120T-300I/TT
Microchip Technology
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MCP130T-315I/TT
Microchip Technology
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MCP120T-475I/TT
Microchip Technology
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MCP111T-300E/TT
Microchip Technology
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MCP120T-315I/TT
Microchip Technology
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MCP809T-315I/TT
Microchip Technology
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