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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:
- MAX6327 3-PIN, ULTRA-LOW-POWER S
- Quantity:
- Payment:
- Shipping:
Inventory:2,360
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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 systems. It asserts a high-level reset signal when VCC falls below 2.93V and holds it for ≥100ms after VCC recovers, operates down to 1V supply, draws ≤1µA supply current, and is housed in a 3-pin SOT23 package for portable and battery-powered applications.
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 critical µP/µC power monitoring where stable threshold accuracy (±1.5% at +25°C), transient immunity, and guaranteed state retention down to 1V are required.
Technical Context
The MAX6327UR29+ integrates a factory-trimmed voltage comparator with 2.93V threshold (±1.5% at +25°C, ±2.5% over –40°C to +85°C), hysteresis of 9.5mV, and temperature coefficient of 40ppm/°C. Its reset timeout is guaranteed ≥100ms, with delay from VCC drop to reset assertion under 20µs.
It features active-high push-pull RESET output capable of sourcing 500µA at VOH ≥0.8·VCC (VCC ≥2.1V) and sinking 1.2mA at VOL ≤0.3V (VCC ≥3.2V). The device ignores fast VCC transients and remains functional down to VCC = 1V, ensuring reliable supervision during brownout and power-up sequences.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±1.5% at +25°C; ensures precise brownout detection for 3V nominal systems |
| Supply Current | ≤1µA max; enables multi-year operation in coin-cell–powered devices |
| Reset Pulse Width | ≥100ms minimum; guarantees sufficient time for µP initialization and memory stabilization |
| Operating Voltage Range | 1.0V to 5.5V; supports supervision down to deep brownout and across 2.5V/3V/3.3V/5V rails |
| Output Type | Active-high push-pull; eliminates need for external pull-up resistor and simplifies interface to µP reset inputs |
| Tempco | 40ppm/°C; maintains threshold stability across industrial temperature range (–40°C to +85°C) |
| Hysteresis | 9.5mV; prevents chatter during slow VCC recovery near threshold |
Pinout & Package
MAX6327UR29+ is packaged in a 3-pin SOT23-3 surface-mount package (2.92mm × 1.3mm × 1.0mm), optimized for space-constrained PCB layouts in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be low-impedance connection |
| 2 | RESET | Active-high push-pull output; drives high during reset assertion (VCC < 2.93V) and low otherwise |
| 3 | VCC | Power supply input; powers internal circuitry and defines monitored rail; functional down to 1V |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | ≤1µA max enables >10-year battery life in always-on monitoring applications |
| Precision threshold trim | Factory-set 2.93V with ±1.5% room-temp tolerance eliminates calibration overhead |
| Transient immunity | Rejects VCC glitches ≤200µs (at 100mV overdrive), preventing false resets |
| No external components | Self-contained reset generation requires zero external parts-reduces BOM and layout area |
| 1V operation guarantee | Ensures valid reset state even during severe brownout, supporting robust system recovery |
Applications
| Industrial Controllers | Portable Medical Devices |
|---|---|
|
Use Scenario: PLC I/O modules requiring fail-safe restart after AC line sags or backup battery dips. IC Role / Device Role / Timing Role: Supervises 3.3V logic rail and asserts active-high reset to ARM Cortex-M controller on undervoltage. Use Value: Guaranteed ≥100ms reset pulse ensures complete firmware reload and peripheral reinitialization before execution resumes. |
Use Scenario: Handheld glucose meters powered by CR2032 coin cell with variable load-induced voltage droop. IC Role / Device Role / Timing Role: Monitors 3V supply and triggers reset when battery voltage drops below 2.93V during measurement burst. Use Value: 1µA quiescent current extends single-cell battery life beyond 3 years while maintaining accurate low-voltage detection. |
| Automotive Body Control Modules | Smart Energy Meters |
|
Use Scenario: 12V-to-3.3V converted subsystems exposed to load-dump and cold-crank transients. IC Role / Device Role / Timing Role: Provides reset supervision for CAN microcontroller during ignition cycling and battery voltage instability. Use Value: 40ppm/°C tempco and –40°C to +85°C rating ensure consistent 2.93V threshold across vehicle thermal environments. |
Use Scenario: Revenue-grade electricity meters operating continuously on auxiliary power with strict uptime requirements. IC Role / Device Role / Timing Role: Resets meter SoC upon detected 3V rail collapse due to capacitor aging or surge events. Use Value: Push-pull output directly drives reset pin without pull-up, eliminating resistor drift and improving long-term reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD29+T | Same 2.93V threshold, but open-drain output requiring external pull-up; 1.2µA max ICC | Suitable where bidirectional reset pins or wired-OR topology is needed | Select when interfacing with µPs like 68HC11 that require open-drain reset assertion |
| TPS3808G33DBVR | 2.93V threshold with adjustable delay (via capacitor); 2.5µA ICC; wider VCC range (up to 6.5V) | Used where programmable reset timeout or higher supply voltage tolerance is required | Choose when design needs configurable reset duration or operation above 5.5V |
Compared with MAX6327UR29+, MAX809TRD29+T offers open-drain flexibility at the cost of added component count and slightly higher current, while TPS3808G33DBVR trades fixed timing simplicity for configurability and extended voltage range-making MAX6327UR29+ optimal for cost-sensitive, space-constrained, ultra-low-power 3V-system supervision.
Availability
MAX6327UR29+ is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, and automotive body electronics requiring stable component supply, long-lifecycle support, and lead-free compliance.
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) designs precision analog, mixed-signal, and power-management ICs for industrial, computing, and communications markets.
The MAX6327UR29+ belongs to Maxim's µP supervisory circuit family, engineered specifically for ultra-low-power, high-accuracy reset generation in battery-operated and mission-critical embedded systems.
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, specified as ±1.5% at +25°C and ±2.5% over the full –40°C to +85°C operating temperature range. This precision eliminates manual calibration and ensures consistent brownout detection across environmental conditions in applications such as portable instrumentation and industrial controllers using the MAX6327UR29+.
Does MAX6327UR29+ require any external components to function?
No, the MAX6327UR29+ is fully self-contained and requires no external resistors, capacitors, or trimming components. Its internal precision voltage reference, comparator, and push-pull output driver enable direct integration into 3V system power rails-reducing BOM count, PCB area, and design validation effort for designs deploying the MAX6327UR29+.
What is the maximum VCC voltage the MAX6327UR29+ can tolerate, and what happens below 1V?
The MAX6327UR29+ supports VCC from 1.0V to 5.5V. Below 1V, the device is not guaranteed to maintain correct reset state; however, it is explicitly guaranteed to operate correctly down to 1V, ensuring reliable reset assertion during deep brownout conditions common in battery-powered systems using the MAX6327UR29+.
How does the active-high push-pull output of MAX6327UR29+ simplify µP interface compared to open-drain alternatives?
The active-high push-pull output of MAX6327UR29+ drives high during reset and low otherwise-eliminating the need for an external pull-up resistor. This reduces component count, avoids resistor tolerance drift, and ensures faster rise/fall times than open-drain equivalents, making MAX6327UR29+ ideal for deterministic reset timing in µP-based systems.
Is MAX6327UR29+ compatible with lead-free assembly processes?
Yes, MAX6327UR29+ is supplied in lead-free packaging compliant with RoHS and JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1). The "+" suffix denotes lead-free finish, and the device supports standard reflow profiles up to 260°C peak, enabling seamless integration into modern lead-free manufacturing lines using the MAX6327UR29+.
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:
- -
- Type:
- Power Supply Monitor
- 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.
MAX6327UR29+ Tags
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