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Analog Devices Inc./Maxim Integrated MAX6327UR29
- Part No.:
- MAX6327UR29
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6327UR29.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,385
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Product details
Overview
MAX6327UR29 from Maxim Integrated is an active-high push-pull microprocessor supervisory circuit designed to monitor 2.93V power supplies in embedded digital systems. It asserts a high-level reset signal when VCC falls below 2.93V (±1.5% at +25°C, ±2.5% over -40°C to +85°C), holds reset for ≥100ms after VCC recovers, draws ≤1µA supply current, and operates down to 1V VCC - making it suitable for battery-powered portable equipment requiring reliable brownout detection.
For engineers reviewing the MAX6327UR29 datasheet, MAX6327UR29 pinout, MAX6327UR29 application, or MAX6327UR29 equivalent, this device serves as a precision, ultra-low-power reset supervisor for 2.93V rails in space-constrained industrial controllers, automotive ECUs, and intelligent instrumentation where deterministic reset timing and transient immunity are critical.
Technical Context
The MAX6327UR29 integrates a factory-trimmed voltage comparator with hysteresis (9.5mV typical) and a precise timeout delay circuit to guarantee ≥100ms reset assertion after VCC recovery. Its reset threshold is fixed at 2.93V and fully specified across -40°C to +85°C with 40ppm/°C tempco.
It features active-high push-pull output capable of sourcing 800µA (VOH = 0.8·VCC) and sinking 3.2mA (VOL = 0.4V), with built-in immunity to fast VCC transients - rejecting negative glitches up to 200µs at 100mV overdrive - and requires no external components for basic operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±1.5% (25°C), ±2.5% (-40°C to +85°C); ensures reliable detection of 2.93V rail brownout without false triggering. |
| Supply Current | ≤1µA max; enables multi-year operation on coin-cell batteries in portable monitoring devices. |
| Reset Pulse Width | ≥100ms minimum; guarantees sufficient time for microcontroller initialization and memory stabilization. |
| Output Type | Active-high push-pull; drives logic-high reset directly without pull-up resistor, simplifying interface to µP reset pins. |
| VCC Operating Range | 1.0V to 5.5V; supports supervision during deep brownout and full rail operation without latch-up. |
| Tempco | 40ppm/°C; maintains tight threshold stability across industrial temperature range. |
| Hysteresis | 9.5mV typical; prevents oscillation near threshold during slow VCC recovery. |
Pinout & Package
MAX6327UR29 is housed in a 3-pin SOT23-3 package (JEDEC MO-178AA), with 1.3mm × 2.9mm footprint and 1.45mm height - optimized for high-density PCB layouts in portable and automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal comparator and output driver; must be connected to system ground plane for stable threshold accuracy. |
| 2 (RESET) | Active-high push-pull output | Drives high during reset assertion (VCC < 2.93V); sinks 3.2mA or sources 800µA; connects directly to µP reset input. |
| 3 (VCC) | Supply voltage input | Monitored power rail input; also powers internal circuitry; functional down to 1.0V for fail-safe operation. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | ≤1µA max enables >10-year battery life in always-on sensor nodes using CR2032 cells. |
| Precision 2.93V threshold | Factory-trimmed to ±1.5% at 25°C ensures accurate supervision of 2.93V LDO outputs without calibration. |
| 100ms minimum reset timeout | Guaranteed minimum pulse width eliminates need for external RC timing networks in µP boot sequencing. |
| VCC transient immunity | Rejects negative glitches ≤200µs at 100mV overdrive, preventing spurious resets during switching noise events. |
| No external components required | Single-chip solution reduces BOM count, PCB area, and qualification effort versus discrete reset circuits. |
Applications
| Automotive Body Control Module | Portable Medical Sensor Node |
|---|---|
|
Use Scenario: Supervises 2.93V microcontroller supply in door module exposed to load-dump and cold-crank conditions. IC Role / Device Role / Timing Role: Active-high reset supervisor asserting high during VCC dip below 2.93V, holding ≥100ms for MCU firmware reload. Use Value: Prevents erratic MCU behavior during battery voltage sag; push-pull output eliminates external pull-up, reducing component count in ASIL-B–aligned designs. |
Use Scenario: Monitors regulated 2.93V rail powering BLE SoC and analog front-end in wearable ECG patch. IC Role / Device Role / Timing Role: Ultra-low-power reset generator ensuring clean boot after coin-cell insertion or low-battery recovery. Use Value: 1µA max ICC extends CR2032 battery life beyond 5 years in sleep mode; SOT23-3 footprint fits sub-100mm² wearable PCB. |
| Industrial PLC I/O Submodule | Smart Energy Meter Controller |
|
Use Scenario: Provides deterministic reset for ARM Cortex-M4 core operating from 2.93V LDO in DIN-rail mounted controller. IC Role / Device Role / Timing Role: Precision voltage monitor with 40ppm/°C tempco maintaining threshold stability across -40°C to +85°C ambient. Use Value: Eliminates field failures due to thermal drift-induced premature reset; push-pull drive ensures robust noise margin on long PCB traces. |
Use Scenario: Supervises 2.93V supply to metrology ASIC and real-time clock in ANSI C12.20–compliant electricity meter. IC Role / Device Role / Timing Role: Brownout detector with hysteresis (9.5mV) preventing chatter during slow AC line recovery. Use Value: Ensures meter retains timekeeping integrity and avoids corrupted kWh registers during grid sags; operates down to 1V for last-gasp data save. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TR29D3T | Same 2.93V threshold, but open-drain output requiring external pull-up; 1.2µA max ICC. | Suitable only where µP reset pin accepts open-drain interface; adds one passive component and increases leakage risk. | Select MAX809TR29D3T only if legacy design uses open-drain topology or board layout cannot accommodate push-pull drive. |
| TPS3808G33DBVR | 2.93V threshold option available; 1.8µA max ICC; wider VCC range (0.8V–6V); adjustable reset delay via capacitor. | Offers programmable timeout but higher current draw; not pin-compatible; requires additional timing capacitor. | Choose TPS3808G33DBVR when extended reset duration (>100ms) or ultra-low-VCC operation below 1.0V is required. |
Compared with MAX809TR29D3T and TPS3808G33DBVR, the MAX6327UR29 delivers lowest power (≤1µA), guaranteed push-pull drive without external components, and optimal fit for compact, battery-sensitive 2.93V supervision - trading programmability and ultra-wide VCC range for minimal size and current.
Availability
MAX6327UR29 is available at Aetrix Electronics and suitable for automotive body control modules, portable medical sensors, industrial PLC submodules, smart energy meters, and battery-powered instrumentation requiring stable component supply with long-term lifecycle support.
Supply support for MAX6327UR29 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and computing applications.
The MAX6327UR29 belongs to Maxim's µP supervisory circuit product line, engineered specifically for ultra-low-power, precision voltage monitoring in space- and energy-constrained embedded systems where reliability under voltage transients is critical.
FAQ
What is the exact reset threshold voltage of MAX6327UR29 and how tightly is it specified?
The MAX6327UR29 has a factory-trimmed reset threshold of 2.93V, with tolerance of ±1.5% at +25°C and ±2.5% over the full operating temperature range of -40°C to +85°C. This specification is guaranteed by production testing and documented in the Electrical Characteristics table of the official datasheet. The MAX6327UR29 uses laser trimming to achieve this precision without external calibration components.
Does MAX6327UR29 require any external components to function as a reset supervisor?
No, the MAX6327UR29 requires zero external components for basic reset supervision functionality. Its internal voltage reference, comparator, and timer are fully integrated. Unlike open-drain alternatives, its active-high push-pull output eliminates the need for an external pull-up resistor. Only VCC, GND, and the RESET connection to the microprocessor are necessary for operation.
What is the maximum allowable VCC transient duration that MAX6327UR29 will ignore without asserting reset?
The MAX6327UR29 ignores negative-going VCC transients up to 200µs in duration when the overdrive (VTH – VCC) is 100mV, as shown in the "Maximum Transient Duration vs. Reset Threshold Overdrive" graph in the datasheet. This immunity is achieved through internal filtering and ensures robust operation in electrically noisy environments like automotive or industrial motor-control subsystems.
Can MAX6327UR29 operate reliably when VCC drops below 2.93V but remains above 1.0V?
Yes, the MAX6327UR29 is fully functional and guarantees correct reset state down to VCC = 1.0V - well below its 2.93V threshold. This allows it to assert and hold reset even during severe brownout conditions where the supply may collapse to 1.2V or 1.5V before recovering. The internal circuitry remains biased and stable throughout this range, ensuring no metastability or undefined output behavior.
Is MAX6327UR29 pin-compatible with other members of the MAX6326/MAX6327/MAX6328 family?
Yes, all MAX6326/MAX6327/MAX6328 variants share identical SOT23-3 pinout (GND, RESET, VCC) and package dimensions. The MAX6327UR29 is pin-compatible with MAX6326UR29 and MAX6328UR29 - differing only in output polarity (active-high push-pull vs. active-low push-pull vs. active-low open-drain). This allows direct substitution in existing layouts when output logic level requirements change.
MAX6327UR29 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:
- 2.93V
- 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 FAQ
1.How can I place an order for MAX6327UR29 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6327UR29 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 reliable?
The price and inventory of MAX6327UR29 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6327UR29 is usually 5 days.
3.What payment methods are accepted for MAX6327UR29?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6327UR29 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6327UR29?
MAX6327UR29 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6327UR29 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?
For technical support, including MAX6327UR29 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6327UR29 requirements.
6.How does Aetrix verify that MAX6327UR29 is sourced from the original manufacturer or authorized distributors?
All MAX6327UR29 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 meets industry standards.
7.What is the process for return or replacement of MAX6327UR29?
All MAX6327UR29 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6327UR29, 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 part is unused and in its original packaging.
Return procedure for MAX6327UR29:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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