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Analog Devices Inc./Maxim Integrated MAX6326UR25-TG104
- Part No.:
- MAX6326UR25-TG104
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6326UR25-TG104.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:14,960
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Product details
Overview
MAX6326UR25-TG104 from Maxim Integrated is an ultra-low-power, active-low push-pull microprocessor supervisory circuit designed to monitor 2.5V power supplies and assert a reset signal during brownout or power-up conditions. It features a factory-trimmed 2.500V reset threshold (±1.5% at +25°C), 100ms minimum reset timeout, 1µA maximum supply current at 3V, and operates over –40°C to +85°C in SOT23-3 packaging. It is used in portable battery-powered systems requiring reliable, low-quiescent-power supply monitoring.
For engineers reviewing the MAX6326UR25-TG104 datasheet, MAX6326UR25-TG104 pinout, MAX6326UR25-TG104 application, or MAX6326UR25-TG104 equivalent, key selection criteria include reset threshold accuracy, push-pull output drive capability, ultra-low ICC, temperature-stable hysteresis (6.3mV), and compatibility with 2.5V µP power rails and bidirectional reset interfaces.
Technical Context
The MAX6326UR25-TG104 implements a precision bandgap-based voltage comparator with internal hysteresis (6.3mV) to reject fast VCC transients and ensure glitch immunity. Its reset assertion logic holds RESET low for ≥100ms after VCC rises above 2.500V, guaranteeing proper µP initialization.
This device uses a push-pull output stage capable of sourcing 500µA at 0.8·VCC and sinking 1.6mA at ≤0.3V - enabling direct interface with µP reset inputs without external pull-up resistors. It remains fully functional down to VCC = 1.2V over full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.500V ±1.5% at +25°C; ensures reliable detection of 2.5V supply brownout before µP malfunction |
| Supply Current | 1.0µA max at 3V; enables multi-year operation in coin-cell–powered IoT sensors and wearables |
| Reset Timeout | 100ms min power-up delay; satisfies ARM Cortex-M and PIC MCU reset timing requirements |
| Output Type | Active-low push-pull; eliminates need for external pull-up resistor on µP reset line |
| Operating Temp | –40°C to +85°C; qualified for industrial embedded control and automotive body electronics |
| VCC Range | 1.2V to 5.5V; supports operation during deep brownout and allows use with Li-ion, NiMH, and regulated 2.5V rails |
| Hysteresis | 6.3mV; prevents chatter during slow-rising/falling VCC transitions near threshold |
Pinout & Package
MAX6326UR25-TG104 is housed in a 3-pin SOT23-3 package (outline U3-1, land pattern 90-0179), with 1.3mm × 2.9mm footprint and 1.45mm height - compatible with high-density PCB layouts and automated assembly.
| 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 during fault; actively pulls high when VCC > 2.500V + hysteresis - no external pull-up required |
| 3 (VCC) | Supply 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 | 1.0µA max ensures <1µA standby load on 2.5V coin-cell sources in always-on monitoring applications |
| Precision 2.5V threshold | Factory-trimmed to 2.500V ±1.5% at +25°C and ±2.5% over –40°C to +85°C - meets tight µP VDD tolerance specs |
| Transient-immune comparator | Rejects VCC glitches <20µs wide (at 200mV overdrive), preventing false resets in noisy power environments |
| No external components | Integrates voltage reference, timer, comparator, and push-pull driver - reduces BOM count and layout area |
| Guaranteed state down to 1.2V | Ensures predictable reset behavior during deep brownout, supporting graceful shutdown in low-VCC conditions |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous glucose monitors and pulse oximeters powered by CR2032 batteries require guaranteed reset during cold-start and low-battery brownout. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to ARM Cortex-M0+ MCU until stable 2.5V rail is confirmed. Use Value: 1µA ICC extends battery life beyond 5 years; 2.500V threshold matches sensor analog front-end supply tolerance. |
Use Scenario: DIN-rail mounted I/O modules operating in factory environments with fluctuating 24VDC-derived 2.5V logic rails. IC Role / Device Role / Timing Role: Power-on reset generator ensuring deterministic FPGA configuration and µP boot sequence after AC power restoration. Use Value: 100ms timeout exceeds typical DC-DC converter startup time; –40°C to +85°C rating supports uncontrolled cabinet temperatures. |
| Smart Energy Meters | Automotive Body Control Units |
Use Scenario: Revenue-grade electricity meters using isolated 2.5V rails for metrology ADCs and real-time clocks. IC Role / Device Role / Timing Role: Brownout detector triggering controlled data save and shutdown before VDD drops below ADC operational minimum. Use Value: 6.3mV hysteresis prevents oscillation during slow grid-sag events; 1.2V functional lower limit enables last-gasp EEPROM write. |
Use Scenario: Door module ECUs powered from vehicle battery via LDO, subject to load-dump and cranking transients. IC Role / Device Role / Timing Role: Reset supervisor holding Infineon AURIX TC3xx in reset until post-cranking 2.5V rail stabilizes. Use Value: Immunity to 20µs VCC glitches avoids spurious resets during alternator switching; SOT23-3 fits constrained space behind door panel. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD3-T | 2.63V reset threshold; 1.2µA ICC; same SOT23-3 package and push-pull output | Designed for 2.63V/2.7V systems; less precise threshold (±2.5%) and higher tempco | Select when 2.63V threshold better matches system VDD tolerance or legacy design reuse is required |
| TPS3808G125DBVR | 2.5V threshold (±0.5%); 1.8µA ICC; open-drain output requiring external pull-up | Higher accuracy but adds BOM component; lacks push-pull drive for direct µP interface | Choose when tighter threshold tolerance is critical and board space allows pull-up resistor |
Compared with MAX6326UR25-TG104, MAX809TRD3-T offers simpler qualification history but looser threshold accuracy, while TPS3808G125DBVR delivers superior voltage precision at the cost of added external components and reduced drive strength - making MAX6326UR25-TG104 optimal for cost-sensitive, space-constrained 2.5V portable designs demanding true push-pull simplicity.
Availability
MAX6326UR25-TG104 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and smart energy meters requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.
Supply support for MAX6326UR25-TG104 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, communications, and consumer applications.
The MAX6326 family was engineered specifically for ultra-low-power microprocessor reset supervision in battery-critical and space-constrained systems - prioritizing sub-µA quiescent current, factory-trimmed voltage thresholds, and minimal external component count.
FAQ
What is the exact reset threshold voltage of MAX6326UR25-TG104, and how does it vary with temperature?
The MAX6326UR25-TG104 has a nominal reset threshold of 2.500V at +25°C, with a tolerance of ±1.5% at room temperature and ±2.5% across the full –40°C to +85°C operating range. Its temperature coefficient is 40ppm/°C, resulting in a maximum deviation of approximately ±12.5mV over the entire temperature span - verified per Electrical Characteristics Table in the official datasheet.
Does MAX6326UR25-TG104 require an external pull-up resistor on its RESET pin?
No, MAX6326UR25-TG104 does not require an external pull-up resistor because it features an active-low push-pull output. The internal driver actively pulls RESET high when VCC exceeds the threshold plus hysteresis, eliminating reliance on external components - a key differentiator from open-drain supervisors like the MAX6328UR25-TG104.
Can MAX6326UR25-TG104 operate reliably below 2.5V, and what is its minimum functional VCC?
Yes, MAX6326UR25-TG104 remains fully specified down to VCC = 1.2V over –40°C to +85°C. It guarantees correct reset assertion and release behavior even at this level, enabling use in deep brownout scenarios where the monitored 2.5V rail collapses partially - critical for safe shutdown in portable equipment.
What is the power-on reset timeout duration of MAX6326UR25-TG104, and is it adjustable?
The MAX6326UR25-TG104 provides a fixed minimum power-on reset timeout of 100ms after VCC rises above the 2.500V threshold. This duration is internally generated and non-adjustable - designed to exceed typical µP and FPGA boot initialization times without requiring external timing components.
How does MAX6326UR25-TG104 handle fast transients on the VCC supply line?
MAX6326UR25-TG104 incorporates transient immunity circuitry that ignores VCC glitches shorter than ~20µs (at 200mV overdrive), as shown in the Typical Operating Characteristics graph "Maximum Transient Duration vs. Reset Threshold Overdrive." This prevents false resets during switching noise or ESD-induced supply disturbances.
MAX6326UR25-TG104 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- SOT-23-3
MAX6326UR25-TG104 FAQ
1.How can I place an order for MAX6326UR25-TG104 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6326UR25-TG104 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 MAX6326UR25-TG104 reliable?
The price and inventory of MAX6326UR25-TG104 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6326UR25-TG104 is usually 5 days.
3.What payment methods are accepted for MAX6326UR25-TG104?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6326UR25-TG104 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6326UR25-TG104?
MAX6326UR25-TG104 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6326UR25-TG104 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 MAX6326UR25-TG104?
For technical support, including MAX6326UR25-TG104 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6326UR25-TG104 requirements.
6.How does Aetrix verify that MAX6326UR25-TG104 is sourced from the original manufacturer or authorized distributors?
All MAX6326UR25-TG104 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 MAX6326UR25-TG104 meets industry standards.
7.What is the process for return or replacement of MAX6326UR25-TG104?
All MAX6326UR25-TG104 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6326UR25-TG104, 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 MAX6326UR25-TG104 part is unused and in its original packaging.
Return procedure for MAX6326UR25-TG104:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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