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Analog Devices Inc./Maxim Integrated MAX6326XR25+T
- Part No.:
- MAX6326XR25+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6326XR25+T.pdf
- Description:
- IC MPU/RESET CIRC 2.50V SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,378
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Product details
Overview
MAX6326XR25+T from Maxim Integrated is a 3-pin ultra-low-power microprocessor supervisory circuit in SC70-3 package, providing active-low push-pull reset output with factory-trimmed 2.500V reset threshold (±1.5% at +25°C, ±2.5% over -40°C to +85°C), 100ms minimum reset timeout, and 1µA max supply current at 3V - used for reliable power-on/brownout reset assertion in battery-powered µP systems.
For engineers reviewing the MAX6326XR25+T datasheet, MAX6326XR25+T pinout, MAX6326XR25+T application, or MAX6326XR25+T equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative options for 2.5V system monitoring where low quiescent current and transient immunity are critical.
Technical Context
The MAX6326XR25+T integrates a precision voltage comparator with hysteresis (6.3mV) and internal timing circuitry to generate a clean, glitch-immune reset signal. Its reset assertion remains active for ≥100ms after VCC rises above 2.500V, ensuring µP initialization completes before release.
Designed for operation down to 1.2V VCC, it features 40ppm/°C reset threshold tempco and ignores fast VCC transients - confirmed by Maximum Transient Duration vs. Reset Threshold Overdrive curves showing immunity to sub-200µs negative glitches at 200mV overdrive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.500V ±1.5% (25°C); ensures reliable reset assertion during 2.5V rail brownout |
| Supply Current | 1.0µA max at 3V; enables multi-year battery life in portable equipment |
| Reset Timeout | 100ms min power-up delay; guarantees full µP initialization before release |
| Output Type | Active-low push-pull; drives RESET line directly without external pull-up |
| VCC Range | 1.2V to 5.5V; supports operation during deep brownout and across 2.5V/3.3V/5V systems |
| Tempco | 40ppm/°C; limits threshold drift to ±25mV over -40°C to +85°C |
| Hysteresis | 6.3mV; prevents chatter during slow VCC recovery near threshold |
Pinout & Package
MAX6326XR25+T is housed in a 3-pin SC70-3 package (outline 21-0075, land pattern 90-0208), measuring 2.0mm × 2.1mm × 0.95mm, RoHS-compliant with lead-free finish.
| 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 at 0.3V (VCC > 2.1V) during reset assertion |
| 3 | VCC | Supply input; monitors rail voltage and powers internal circuitry (1.2V–5.5V range) |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1µA max enables >10-year coin-cell operation in always-on monitoring |
| Factory-trimmed VTH | 2.500V threshold set at wafer level with ±1.5% tolerance eliminates calibration |
| Transient immunity | Rejects VCC glitches <200µs at 200mV overdrive per typical operating curves |
| No external components | Self-contained reset generation requires zero external passives or resistors |
| Wide temperature spec | Guaranteed operation from -40°C to +85°C with full parameter validation |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Wearable ECG patch powered by CR2032 coin cell, requiring guaranteed reset on cold-start and battery sag. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET until 2.5V rail stabilizes for 100ms post-power-up. Use Value: 1µA max ICC extends battery life beyond 5 years; 2.500V threshold matches LiMnO₂ nominal voltage. |
Use Scenario: DIN-rail mounted I/O module exposed to 40–85°C ambient, with 2.5V FPGA configuration rail. IC Role / Device Role / Timing Role: Brownout detector holding FPGA in reset during 2.5V rail dip below 2.437V (min over temp). Use Value: ±2.5% threshold tolerance and 40ppm/°C tempco ensure deterministic reset across full industrial range. |
| Smart Meter Communication ICs | Automotive Body Control Units |
Use Scenario: NB-IoT modem subsystem powered from 2.5V LDO, needing glitch-free reset during RF transmit current surges. IC Role / Device Role / Timing Role: Push-pull RESET driver eliminating external pull-up resistor and reducing BOM count. Use Value: 6.3mV hysteresis prevents false resets during 100mV rail ripple induced by GSM burst transmission. |
Use Scenario: Low-power CAN transceiver interface powered from 2.5V domain, requiring fail-safe reset on ignition cycle. IC Role / Device Role / Timing Role: Primary reset supervisor for microcontroller managing door lock actuation logic. Use Value: Guaranteed correct state down to 1.2V VCC ensures reset assertion even during cranking-induced 1.8V dips. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2+T | 2.5V threshold, same SC70-3 package, but 2.5µA max ICC and no 1.2V VCC guarantee | Lacks guaranteed operation below 1.8V; unsuitable for deep brownout detection | Select when lower cost is prioritized and VCC never drops below 1.8V |
| TPS3808G25DBVR | 2.5V threshold, SOT23-3, 1.5µA max ICC, but requires external capacitor for timeout adjustment | Reset timeout not fixed - design must add 0.1µF capacitor for 100ms delay | Select when adjustable timeout is needed and board space allows extra passive |
Compared with MAX809TRD2+T and TPS3808G25DBVR, the MAX6326XR25+T uniquely combines 1µA max ICC, guaranteed 1.2V operation, and factory-fixed 100ms timeout in a no-component solution - making it optimal for space-constrained, long-life 2.5V systems where reliability trumps configurability.
Availability
MAX6326XR25+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart meter communication ICs, and automotive body control units requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6326XR25+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, sensing, and interface applications, with emphasis on high-reliability, low-power solutions.
The MAX6326 family targets ultra-low-power microprocessor supervision in battery-operated and industrial systems, delivering factory-trimmed reset thresholds and guaranteed behavior down to 1.2V VCC.
FAQ
What is the exact reset threshold voltage of MAX6326XR25+T and its tolerance?
The MAX6326XR25+T has a nominal reset threshold of 2.500V, with ±1.5% tolerance at +25°C and ±2.5% over the full -40°C to +85°C operating range. This is factory-trimmed and specified in Table 1 of the datasheet, where suffix "R25" explicitly denotes the 2.500V variant. The MAX6326XR25+T maintains this accuracy without external calibration.
Does MAX6326XR25+T support operation below 2.5V VCC, and down to what voltage?
Yes, the MAX6326XR25+T is fully specified to operate down to 1.2V VCC over the entire -40°C to +85°C temperature range. Its internal circuitry remains functional and asserts reset correctly even when VCC sags to 1.2V, enabling robust brownout detection in low-voltage systems. This capability is guaranteed and documented in the Absolute Maximum Ratings and Electrical Characteristics tables for MAX6326XR25+T.
What is the output configuration of MAX6326XR25+T, and how does it interface with a microcontroller?
The MAX6326XR25+T features an active-low push-pull RESET output (pin 2), eliminating the need for an external pull-up resistor. It drives the RESET line directly: sinking 1.6mA at ≤0.3V when asserted, and presenting high impedance when released. This matches standard µP reset inputs requiring active-low assertion, and is confirmed by the Pin Description table and functional diagram in the MAX6326XR25+T datasheet.
How long is the reset timeout period for MAX6326XR25+T, and is it adjustable?
The MAX6326XR25+T provides a fixed minimum reset timeout of 100ms after VCC rises above the 2.500V threshold. This duration is internally generated and non-adjustable - no external capacitor or resistor is required or supported. The actual timeout ranges from 100ms to 280ms depending on temperature and process variation, as specified in the Electrical Characteristics table for MAX6326XR25+T.
Is MAX6326XR25+T compatible with other Maxim reset supervisors like MAX809?
The MAX6326XR25+T is pin-compatible with MAX809 series devices in SC70-3 and SOT23-3 packages, sharing identical pinout (VCC, RESET, GND) and function. However, MAX6326XR25+T offers superior specs: 1µA max ICC vs. 2.5µA for MAX809, guaranteed 1.2V operation vs. 1.8V minimum, and tighter threshold tolerance. These differences make MAX6326XR25+T a performance upgrade, not a drop-in replacement without validation.
MAX6326XR25+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.5V
- 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
MAX6326XR25+T FAQ
1.How can I place an order for MAX6326XR25+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6326XR25+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 MAX6326XR25+T reliable?
The price and inventory of MAX6326XR25+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6326XR25+T is usually 5 days.
3.What payment methods are accepted for MAX6326XR25+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6326XR25+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6326XR25+T?
MAX6326XR25+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6326XR25+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 MAX6326XR25+T?
For technical support, including MAX6326XR25+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6326XR25+T requirements.
6.How does Aetrix verify that MAX6326XR25+T is sourced from the original manufacturer or authorized distributors?
All MAX6326XR25+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 MAX6326XR25+T meets industry standards.
7.What is the process for return or replacement of MAX6326XR25+T?
All MAX6326XR25+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6326XR25+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 MAX6326XR25+T part is unused and in its original packaging.
Return procedure for MAX6326XR25+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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