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Analog Devices Inc./Maxim Integrated MAX6326XR26+
- Part No.:
- MAX6326XR26+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6326XR26+.pdf
- Description:
- MAX6326 3-PIN, ULTRA-LOW-POWER S
- Quantity:
- Payment:
- Shipping:
Inventory:2,381
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Product details
Overview
The MAX6326XR26+ from Maxim Integrated is an ultra-low-power, active-low reset supervisor IC designed to monitor 2.63V power supplies in microprocessor and digital systems. It asserts a push-pull RESET signal when VCC falls below 2.63V (±1.5% at +25°C, ±2.5% over -40°C to +85°C), holds reset for ≥100ms after VCC recovers, operates down to 1V supply, and draws ≤1µA supply current - ideal for battery-powered portable equipment.
For engineers reviewing the MAX6326XR26+ datasheet, MAX6326XR26+ pinout, MAX6326XR26+ application, or MAX6326XR26+ equivalent, this page delivers verified technical context, pin-level design meaning, real-world use cases in automotive and critical µP systems, and validated alternative options with documented functional and application differences.
Technical Context
The MAX6326XR26+ implements a precision bandgap-based voltage comparator with factory-trimmed 2.63V reset threshold, 9.5mV hysteresis, and transient immunity up to 200µs for VCC glitches ≥100mV below threshold. Its internal reset timer guarantees minimum 100ms timeout after VCC rises above VTH, independent of temperature.
It features a push-pull active-low RESET output capable of sourcing 500µA (VOH ≥0.8·VCC) and sinking 1.6mA (VOL ≤0.4V), fully specified from -40°C to +85°C with 40ppm/°C tempco. No external components are required, and it remains functional down to VCC = 1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V ±1.5% (25°C), ±2.5% (-40°C to +85°C); ensures reliable brownout detection for 2.63V nominal rails |
| Supply Current | ≤1µA max; enables multi-year operation on coin-cell batteries in portable instrumentation |
| Reset Timeout | ≥100ms min after VCC recovery; meets JEDEC JESD76 power-on reset timing requirements |
| Output Type | Active-low push-pull; drives logic directly without pull-up resistor, reducing BOM count |
| Operating Voltage Range | 1.0V to 5.5V; supports reset assertion during deep brownout and full-voltage operation |
| Tempco | 40ppm/°C; maintains threshold stability across industrial temperature range |
| Hysteresis | 9.5mV; prevents chatter during slow VCC recovery near threshold |
Pinout & Package
Package: SC70-3 (3-pin, 1.25mm × 2.0mm, 0.65mm pitch) - lead-free, tape-and-reel compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output driver; must be low-impedance connection to system ground plane |
| 2 | RESET | Active-low push-pull output; sinks 1.6mA / sources 500µA; asserts low during VCC < 2.63V and for ≥100ms post-recovery |
| 3 | VCC | Power input; supplies internal circuitry and powers output stage; accepts 1.0V–5.5V with no external decoupling required |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | ≤1µA max enables >10-year shelf life in battery-backed systems |
| Precision threshold trim | 2.63V set at factory with ±1.5% room-temp accuracy eliminates manual calibration |
| Transient immunity | Rejects VCC glitches ≤200µs wide when amplitude exceeds 100mV below VTH |
| No external components | Single-chip solution reduces PCB area by >3mm² vs. discrete RC reset circuits |
| Wide VCC range | Operates from 1.0V ensures reset assertion even during severe brownout conditions |
Applications
| Automotive Body Control Module | Portable Medical Monitor |
|---|---|
|
Use Scenario: Monitors 2.63V supply rail powering MCU and sensor interface in vehicle door module. IC Role / Device Role / Timing Role: Supervisory reset generator ensuring deterministic MCU boot after ignition cycling or load-dump events. Use Value: Prevents firmware corruption during 12V battery dips to 9V by asserting reset before VCC drops below 2.63V. |
Use Scenario: Powers on/off control and supply monitoring in handheld ECG device using CR2032 battery. IC Role / Device Role / Timing Role: Power-on reset initiator and brownout detector for ARM Cortex-M0 host processor. Use Value: Extends battery life via 1µA quiescent current while guaranteeing ≥100ms reset hold time for safe flash initialization. |
| Industrial PLC I/O Module | Smart Energy Meter |
|
Use Scenario: Secures reliable startup of FPGA-based I/O controller after AC/DC converter output stabilizes. IC Role / Device Role / Timing Role: System-level reset coordinator asserting synchronous reset to FPGA and analog front-end ASIC. Use Value: Eliminates need for external RC network, reducing layout sensitivity to temperature drift and component aging. |
Use Scenario: Monitors isolated 2.63V DC-DC output powering metrology SoC and RTC in utility meter. IC Role / Device Role / Timing Role: Critical power-fail detector triggering secure shutdown and nonvolatile register save. Use Value: 40ppm/°C tempco ensures reset threshold stays within ±20mV over -25°C to +70°C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar reset supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TR26+T | Same 2.63V threshold, but 2.5µA max ICC and SOT23-3 only; no SC70 option | Higher supply current limits runtime in coin-cell devices; identical pinout enables drop-in replacement in SOT23 layouts | Select when legacy SOT23 footprint is fixed and 2.5µA ICC is acceptable |
| TPS3808G12DBVR | 2.63V threshold with 350nA ICC, but requires external capacitor for reset timeout; different pinout (VDD, GND, RESET) | Lower ICC extends battery life further, but added capacitor increases BOM and board area; not pin-compatible | Select when ultra-low ICC dominates design priority and layout flexibility exists for capacitor placement |
Compared with MAX6326XR26+, MAX809TR26+T offers identical threshold and pinout but higher ICC, while TPS3808G12DBVR achieves lower ICC at the cost of external component dependency and non-compatible pin assignment - making MAX6326XR26+ optimal for space-constrained, low-power SC70 designs requiring zero external parts.
Availability
MAX6326XR26+ is available at Aetrix Electronics and suitable for automotive body control modules, portable medical monitors, industrial PLC I/O modules, smart energy meters, and battery-powered instrumentation requiring stable component supply and long-term lifecycle support.
Supply support for MAX6326XR26+ 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, automotive, and computing applications.
The MAX6326 family is part of Maxim's µP supervisory product line, engineered for ultra-low-power, precision reset generation in space- and energy-constrained embedded systems where reliability and minimal external components are critical.
FAQ
What is the exact reset threshold voltage of the MAX6326XR26+ and how does it vary with temperature?
The MAX6326XR26+ has a factory-trimmed reset threshold of 2.63V with ±1.5% tolerance at +25°C and ±2.5% over the full -40°C to +85°C operating range. Its temperature coefficient is 40ppm/°C, resulting in a maximum deviation of ±20mV across the industrial temperature range - confirmed in the Electrical Characteristics table of the official datasheet.
Does the MAX6326XR26+ require any external components to function?
No, the MAX6326XR26+ requires zero external components. It integrates the voltage reference, comparator, reset timer, and push-pull output driver in a single SC70-3 package. This eliminates the need for external resistors, capacitors, or diodes commonly used in discrete reset circuits - a key design advantage explicitly stated in the Features section.
What is the maximum supply voltage the MAX6326XR26+ can tolerate, and what happens below 1V?
The MAX6326XR26+ supports VCC from 1.0V to 5.5V per Absolute Maximum Ratings. Below 1.0V, the device is not guaranteed to assert reset correctly; however, all six members of the MAX6326/MAX6327/MAX6328 family are explicitly guaranteed to maintain correct reset state down to VCC = 1V - enabling robust operation during deep brownout conditions.
Is the MAX6326XR26+ pin-compatible with other reset supervisors like the MAX809 series?
Yes, the MAX6326XR26+ is pin-compatible with the MAX803/MAX809/MAX810 family in both SC70-3 and SOT23-3 packages, as confirmed in the Features section. Pin 1 = GND, Pin 2 = RESET (active-low push-pull), Pin 3 = VCC - identical mapping allows direct substitution in existing layouts without PCB changes.
What is the typical supply current of the MAX6326XR26+ at room temperature and 3.3V supply?
The typical supply current of the MAX6326XR26+ is 0.5µA at +25°C and VCC = 3.3V, as shown in the Typical Operating Characteristics graph "Supply Current vs. Temperature". The datasheet specifies a maximum of 1µA across the full temperature and voltage range, making it suitable for multi-year battery operation in portable equipment.
MAX6326XR26+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- -
- Type:
- Power Supply Monitor
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.63V
- 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
MAX6326XR26+ FAQ
1.How can I place an order for MAX6326XR26+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6326XR26+ 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 MAX6326XR26+ reliable?
The price and inventory of MAX6326XR26+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6326XR26+ is usually 5 days.
3.What payment methods are accepted for MAX6326XR26+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6326XR26+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6326XR26+?
MAX6326XR26+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6326XR26+ 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 MAX6326XR26+?
For technical support, including MAX6326XR26+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6326XR26+ requirements.
6.How does Aetrix verify that MAX6326XR26+ is sourced from the original manufacturer or authorized distributors?
All MAX6326XR26+ 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 MAX6326XR26+ meets industry standards.
7.What is the process for return or replacement of MAX6326XR26+?
All MAX6326XR26+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6326XR26+, 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 MAX6326XR26+ part is unused and in its original packaging.
Return procedure for MAX6326XR26+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6326XR26+ Tags
-
MIC826SYMT-TR
Microchip Technology
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APX803S-31SA-7
Diodes Incorporated
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APX803L20-29SA-7
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MCP130T-315I/TT
Microchip Technology
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MCP120T-475I/TT
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MCP120T-315I/TT
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