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Analog Devices Inc./Maxim Integrated MAX6327UR29+T
- Part No.:
- MAX6327UR29+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6327UR29+T.pdf
- Description:
- IC MPU/RESET CIRC 2.93V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,675
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Product details
Overview
MAX6327UR29+T from Maxim Integrated is an active-high push-pull microprocessor supervisory circuit that monitors VCC supply voltage and asserts a reset signal when VCC falls below 2.93V, maintaining reset for ≥100ms after VCC recovers; features ultra-low 1µA max supply current, operates down to 1.2V VCC, and is housed in a 3-pin SOT23 package for portable power-monitoring applications.
For engineers reviewing the MAX6327UR29+T datasheet, MAX6327UR29+T pinout, MAX6327UR29+T application, or MAX6327UR29+T equivalent, this page delivers verified electrical specs, thermal behavior, reset timing accuracy, packaging details, and real-world use cases in battery-powered µP systems requiring reliable brownout detection and low-quiescent-current supervision.
Technical Context
The MAX6327UR29+T implements a precision bandgap-based reset comparator with factory-trimmed 2.93V threshold (±1.5% at +25°C, ±2.5% over –40°C to +85°C) and 40ppm/°C tempco, ensuring stable trip points across temperature. Its push-pull output drives high during reset assertion and low otherwise, eliminating external pull-up components.
Designed for immunity to fast VCC transients, it ignores glitches ≤20µs at 100mV overdrive and supports VCC ramp rates up to 100V/µs. The device guarantees correct reset state down to 1.2V VCC and delivers a minimum 100ms power-on reset timeout with typical 185ms duration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±1.5% at +25°C; ensures precise brownout detection for 3V systems without external calibration |
| Supply Current | 1.0µA max at +25°C; enables multi-year battery life in always-on portable monitoring circuits |
| Reset Timeout | 100ms min (185ms typ); guarantees sufficient µP initialization time after power recovery |
| VCC Operating Range | 1.2V to 5.5V; supports operation during deep brownout and compatibility with 1.2V–5V logic domains |
| Output Type | Active-high push-pull; drives RESET high during fault and low during normal operation-no external pull-up required |
| Temp Range | –40°C to +85°C; validated for industrial-grade embedded control and instrumentation environments |
| Reset Hysteresis | 6.3mV; prevents chatter near threshold during slow VCC recovery or noise |
Pinout & Package
MAX6327UR29+T is packaged in a 3-pin SOT23-3 (U3-1) surface-mount package with 0.95mm pitch, footprint-compatible with industry-standard 3-pin supervisors and optimized for space-constrained PCB layouts.
| 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-high push-pull output | Drives high during reset (VCC < 2.93V) and low during normal operation; sinks/source capability defined per datasheet |
| 3 (VCC) | Supply input | Power rail input monitored by internal comparator; accepts 1.2V–5.5V with guaranteed functionality down to 1.2V |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1µA max enables >10-year battery life in coin-cell–powered IoT sensors and wearables |
| Precision factory-trimmed threshold | 2.93V ±1.5% eliminates need for external resistor dividers or calibration in 3V systems |
| Transient-immune reset comparator | Rejects VCC glitches ≤20µs at 100mV overdrive-critical for noisy automotive or industrial rails |
| No external components required | Integrated reset timer and comparator reduce BOM count and PCB area vs. discrete solutions |
| Guaranteed reset state down to 1.2V | Ensures fail-safe behavior during deep brownout, supporting low-voltage µP architectures |
Applications
| Battery-Powered Data Loggers | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Long-term environmental sensor nodes powered by CR2032 batteries logging temperature/humidity every 5 minutes. IC Role / Device Role / Timing Role: Supervisory IC providing brownout reset to MSP430 µC during battery voltage decay below 2.93V. Use Value: 1µA max ICC extends battery life beyond 5 years; 100ms reset pulse ensures full µC register initialization before firmware execution. | Use Scenario: DIN-rail mounted I/O expansion module operating in factory-floor cabinets with fluctuating 24VDC-derived 3.3V rails. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-high RESET to ARM Cortex-M4 controller during 3.3V rail sags caused by relay switching transients. Use Value: 40ppm/°C tempco maintains threshold stability across –40°C to +85°C ambient; push-pull output avoids pull-up resistor failure modes. |
| Medical Handheld Diagnostics | Smart Energy Meters |
Use Scenario: Portable blood glucose meter using AAA batteries and LCD display requiring deterministic startup after battery insertion. IC Role / Device Role / Timing Role: Power-on reset generator holding Cortex-M0+ in reset until 3V rail stabilizes above 2.93V for ≥100ms. Use Value: Factory-trimmed 2.93V threshold matches nominal 3V supply; SOT23-3 footprint minimizes board area in compact handheld enclosure. | Use Scenario: ANSI C12.20-compliant electricity meter with isolated power supplies and tamper-detection logic. IC Role / Device Role / Timing Role: Critical µP supervisor monitoring the 3.3V MCU domain and triggering secure shutdown on undervoltage. Use Value: Guaranteed reset assertion down to 1.2V VCC ensures fail-safe behavior even during partial power-fail conditions; lead-free +T suffix meets RoHS compliance requirements. |
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 | 2.93V threshold, same SOT23-3 package, but active-low open-drain output; requires external pull-up | Requires redesign of reset net termination; not drop-in compatible due to polarity and drive architecture | Select only if system design already uses active-low reset signaling and includes pull-up resistor |
| TPS3808G33DBVR | 2.93V threshold, push-pull active-high output, but 1.6µA typical ICC (vs. 1µA max for MAX6327UR29+T) | Suitable for same 3V systems but consumes ~60% more quiescent current-reduces battery lifetime in ultra-low-power designs | Prefer MAX6327UR29+T where sub-2µA supply current is critical for multi-year operation |
Compared with MAX809TRD2+T and TPS3808G33DBVR, MAX6327UR29+T uniquely combines active-high push-pull output, 1µA max ICC, and factory-trimmed 2.93V threshold in SOT23-3-making it optimal for space- and power-constrained 3V µP systems needing zero-external-component reliability.
Availability
MAX6327UR29+T is available at Aetrix Electronics and suitable for battery-powered data loggers, industrial PLC I/O modules, medical handheld diagnostics, and smart energy meters requiring stable component supply and long-lifecycle support.
Supply support for MAX6327UR29+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 in industrial, medical, and communications markets.
The MAX6326/MAX6327/MAX6328 family was engineered specifically for ultra-low-power microprocessor supervision in portable and battery-critical systems-prioritizing sub-µA quiescent current, factory-trimmed thresholds, and minimal external component count.
FAQ
What is the exact reset threshold voltage of MAX6327UR29+T and how tightly is it specified?
The MAX6327UR29+T has a nominal reset threshold of 2.93V, factory-trimmed with ±1.5% tolerance at +25°C and ±2.5% over the full –40°C to +85°C operating range. This specification is guaranteed in production testing and documented in the Electrical Characteristics table of the official datasheet. The 2.93V value corresponds directly to the "R29" suffix in MAX6327UR29+T.
Does MAX6327UR29+T require any external components to function as a reset supervisor?
No, MAX6327UR29+T requires no external components. Its active-high push-pull RESET output eliminates the need for a pull-up resistor, and its internal precision voltage reference and timing capacitor deliver guaranteed 100ms minimum reset pulse width. This simplifies design, reduces BOM cost, and improves reliability compared to discrete or open-drain alternatives.
What is the minimum VCC voltage at which MAX6327UR29+T guarantees correct reset behavior?
MAX6327UR29+T guarantees correct reset assertion and deassertion behavior down to VCC = 1.2V across the full –40°C to +85°C temperature range. This allows reliable operation during deep brownout conditions where other supervisors may fail to assert reset, making it suitable for low-voltage µP systems and energy-harvesting applications.
How does the reset timeout of MAX6327UR29+T vary with temperature?
The reset timeout of MAX6327UR29+T is specified as 100ms minimum across temperature, with typical values ranging from 185ms at +25°C to 210ms at +85°C. The datasheet's "Power-Up Reset Timeout vs. Temperature" graph (Figure toc03) confirms monotonic increase with temperature, ensuring conservative timing margins in all operating conditions without derating.
Is MAX6327UR29+T pin-compatible with legacy Maxim supervisors like MAX809?
No, MAX6327UR29+T is not pin-compatible with MAX809. While both use SOT23-3 packages, MAX809 has active-low open-drain output (requiring external pull-up), whereas MAX6327UR29+T features active-high push-pull output. Pin 2 (RESET) serves opposite logic functions and drive types-direct substitution would cause incorrect reset signaling and potential system malfunction.
MAX6327UR29+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6327UR29+T FAQ
1.How can I place an order for MAX6327UR29+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6327UR29+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 MAX6327UR29+T reliable?
The price and inventory of MAX6327UR29+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6327UR29+T is usually 5 days.
3.What payment methods are accepted for MAX6327UR29+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6327UR29+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6327UR29+T?
MAX6327UR29+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6327UR29+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 MAX6327UR29+T?
For technical support, including MAX6327UR29+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6327UR29+T requirements.
6.How does Aetrix verify that MAX6327UR29+T is sourced from the original manufacturer or authorized distributors?
All MAX6327UR29+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 MAX6327UR29+T meets industry standards.
7.What is the process for return or replacement of MAX6327UR29+T?
All MAX6327UR29+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6327UR29+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 MAX6327UR29+T part is unused and in its original packaging.
Return procedure for MAX6327UR29+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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