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Analog Devices Inc./Maxim Integrated MAX6326UR22
- Part No.:
- MAX6326UR22
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6326UR22.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,768
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Product details
Overview
MAX6326UR22 from Maxim Integrated is a precision ultra-low-power microprocessor supervisory circuit in SOT23-3 package, providing active-low push-pull reset assertion when VCC falls below 2.20V (±1.5% at +25°C), with guaranteed operation down to 1.2V over –40°C to +85°C and 100ms minimum reset timeout after power-up. It monitors 2.5V/3.3V/5V systems in portable equipment, controllers, and critical µP power domains.
For engineers reviewing the MAX6326UR22 datasheet, MAX6326UR22 pinout, MAX6326UR22 application, or MAX6326UR22 equivalent, this page delivers verified electrical parameters, thermal behavior, reset timing accuracy, supply current vs. temperature curves, and factory-trimmed threshold validation - all specific to the MAX6326UR22 variant with 2.20V nominal reset voltage and SOT23-3 packaging.
Technical Context
The MAX6326UR22 implements a precision bandgap-based reset comparator with 40ppm/°C tempco and 6.3mV hysteresis, designed to ignore fast VCC transients up to 100V/µs slew rate. Its internal reference is factory-trimmed to 2.20V ±1.5% at +25°C and ±2.5% across full temperature range.
It asserts an active-low push-pull RESET signal for ≥100ms after VCC rises above threshold, with VOL ≤0.3V at ISINK = 1.6mA and VOH ≥0.8·VCC at ISOURCE = 500µA. Supply current remains ≤1.0µA at 3V and ≤1.75µA at 5.5V, enabling battery-powered operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.20V ±1.5% at +25°C; ±2.5% over –40°C to +85°C - ensures reliable brownout detection for 2.5V systems |
| Supply Current | ≤1.0µA at VCC = 3.0V - enables multi-year battery life in portable instrumentation |
| Reset Timeout | 100ms (min) to 280ms (max) after VCC rise - meets JEDEC JESD78 power-on reset timing requirements |
| Output Type | Active-low push-pull - drives standard CMOS reset inputs without external pull-up |
| VCC Operating Range | 1.2V to 5.5V - supports operation during deep brownout and full-system voltage scaling |
| Reset Propagation Delay | 20µs typical from VCC drop to RESET assertion - ensures sub-microsecond response to supply collapse |
| Package | SOT23-3 - 2.92mm × 1.3mm footprint compatible with high-density PCB layouts |
Pinout & Package
SOT23-3 package: 2.92mm × 1.3mm × 1.02mm body, gull-wing leads, RoHS-compliant lead-free option available as MAX6326UR22+T.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be low-impedance connection to system ground plane |
| 2 | RESET | Active-low push-pull output; sinks ≥1.6mA or sources ≥500µA; directly interfaces µP reset input without external components |
| 3 | VCC | Power supply input; accepts 1.2V–5.5V; includes transient immunity circuitry rejecting <100µs negative glitches |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1.0µA max at 3V - reduces quiescent load on coin-cell batteries in handheld medical devices |
| Precision threshold | 2.20V ±1.5% at +25°C - eliminates need for external trimming resistors in 2.5V rail monitoring |
| Transient immunity | Rejects VCC glitches <100µs duration per Typical Operating Characteristics - prevents false resets in noisy industrial environments |
| No external components | Self-contained reset generator - removes BOM cost and layout area versus discrete RC+Schmitt trigger solutions |
| Temperature stability | 40ppm/°C tempco - maintains threshold accuracy across automotive under-hood temperature swings |
Applications
| Portable Medical Monitors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Battery-powered ECG monitor operating from single Li-ion cell with dynamic voltage scaling between 3.0V–3.6V. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low reset to ARM Cortex-M4 MCU during brownout events below 2.20V. Use Value: 1.0µA supply current extends battery life beyond 3 years; 100ms reset timeout ensures complete firmware initialization before peripheral enable. |
Use Scenario: DIN-rail mounted PLC module exposed to 40°C–85°C ambient with 24VDC-to-3.3V conversion. IC Role / Device Role / Timing Role: Primary power-good monitor for 3.3V logic rail, triggering hardware reset if DC/DC converter fails. Use Value: ±2.5% threshold tolerance over temperature guarantees no spurious resets at 85°C; SOT23-3 footprint fits constrained I/O board space. |
| Smart Energy Meters | Automotive Body Control Units |
|
Use Scenario: ANSI C12.22-compliant meter with dual-supply architecture (3.3V MCU + 1.8V RF SoC). IC Role / Device Role / Timing Role: Dedicated supervisor for 3.3V domain, asserting reset to both MCU and RF subsystem via shared reset net. Use Value: Push-pull output drives multiple loads without pull-up resistor; 2.20V threshold aligns with 3.3V rail's 33% undervoltage margin. |
Use Scenario: BCM controlling door locks, lighting, and HVAC using 5V-regulated supply derived from vehicle battery. IC Role / Device Role / Timing Role: Brownout detector for 5V logic rail, holding reset during cranking-induced dips to 6V–9V battery sag. Use Value: 1.2V minimum VCC operation allows continued supervision during severe battery sag; 40ppm/°C tempco ensures reliability at 105°C junction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2-T | 2.32V reset threshold, same SOT23-3 package, 1.5µA max ICC | Higher threshold unsuitable for 2.5V systems near dropout; requires redesign of undervoltage margin | Select only if system operates reliably above 2.32V; not drop-in for MAX6326UR22's 2.20V point |
| TPS3808G12DBVR | 2.2V threshold but open-drain output, 1.8µA ICC, requires external pull-up | Cannot drive heavy capacitive loads directly; adds BOM cost and layout complexity | Use only where bidirectional reset capability is required; otherwise MAX6326UR22 offers lower system-level cost |
Compared with MAX809TRD2-T and TPS3808G12DBVR, the MAX6326UR22 provides tighter threshold accuracy (±1.5% vs ±2%), lower supply current (1.0µA vs 1.5–1.8µA), and push-pull output eliminating external components - making it optimal for space-constrained, battery-sensitive 2.5V applications.
Availability
MAX6326UR22 is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC I/O modules, smart energy meters, and automotive body control units requiring stable component supply with guaranteed long-term continuity.
Supply support for MAX6326UR22 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 industrial, automotive, communications, and computing markets.
The MAX6326 family delivers ultra-low-power, factory-trimmed supervisory circuits targeting battery-operated and thermally demanding embedded systems where reset accuracy and supply current are critical.
FAQ
What is the exact reset threshold voltage for MAX6326UR22 and how does it vary with temperature?
The MAX6326UR22 has a nominal reset threshold of 2.20V at +25°C, with ±1.5% tolerance at room temperature and ±2.5% over the full –40°C to +85°C operating range. Its temperature coefficient is 40ppm/°C, meaning threshold drift is limited to approximately ±11mV across the full temperature span - verified in the Electrical Characteristics table of the official datasheet.
Does MAX6326UR22 support operation below 2.5V, and what is its minimum functional VCC?
Yes, MAX6326UR22 operates down to 1.2V over –40°C to +85°C, ensuring supervision functionality even during deep brownout conditions. This is explicitly guaranteed in the Absolute Maximum Ratings and Electrical Characteristics sections, enabling use in low-voltage microcontrollers and energy-harvesting systems where supply may dip below 2.0V.
What is the reset output configuration of MAX6326UR22 and how does it interface with common microprocessors?
MAX6326UR22 features an active-low push-pull RESET output, capable of sinking ≥1.6mA or sourcing ≥500µA. It directly drives standard CMOS reset inputs without external pull-up resistors, unlike open-drain alternatives. This simplifies design for µPs such as STM32, PIC, and NXP Kinetis families requiring active-low reset assertion.
How does MAX6326UR22 handle power supply transients, and what is its immunity specification?
MAX6326UR22 is designed to ignore fast VCC transients, with a specified maximum transient duration vs. reset threshold overdrive curve showing immunity to negative glitches <100µs at 200mV overdrive. Its comparator includes built-in filtering, and the absolute maximum rating for VCC slew rate is 100V/µs - preventing false resets in electrically noisy environments like motor drives or switching power supplies.
Is MAX6326UR22 pin-compatible with other members of the MAX6326 family or legacy Maxim supervisors?
Yes, MAX6326UR22 shares identical SOT23-3 pinout and function with all MAX6326x variants (e.g., MAX6326UR23, MAX6326UR26) and is pin-compatible with MAX803/MAX809/MAX810 series. Pin 1 = GND, Pin 2 = RESET, Pin 3 = VCC - confirmed in the Pin Configuration diagram and Ordering Information table of the datasheet.
MAX6326UR22 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:
- 2.2V
- 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
MAX6326UR22 FAQ
1.How can I place an order for MAX6326UR22 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6326UR22 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 MAX6326UR22 reliable?
The price and inventory of MAX6326UR22 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6326UR22 is usually 5 days.
3.What payment methods are accepted for MAX6326UR22?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6326UR22 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6326UR22?
MAX6326UR22 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6326UR22 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 MAX6326UR22?
For technical support, including MAX6326UR22 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6326UR22 requirements.
6.How does Aetrix verify that MAX6326UR22 is sourced from the original manufacturer or authorized distributors?
All MAX6326UR22 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 MAX6326UR22 meets industry standards.
7.What is the process for return or replacement of MAX6326UR22?
All MAX6326UR22 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6326UR22, 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 MAX6326UR22 part is unused and in its original packaging.
Return procedure for MAX6326UR22:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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