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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 SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,649
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Product details
Overview
MAX6327UR29-T from Maxim Integrated is an active-high push-pull microprocessor supervisory circuit designed to monitor 2.93V power supplies and assert a reset signal during brownout, power-up, and power-down events. It delivers ultra-low 1µA max supply current, guarantees correct operation down to VCC = 1.2V, provides ≥100ms reset timeout after VCC recovery, and features factory-trimmed ±1.5% (±2.5% over temperature) reset threshold accuracy. It is used in portable battery-powered µP systems requiring reliable, low-power supply monitoring.
For engineers reviewing the MAX6327UR29-T datasheet, MAX6327UR29-T pinout, MAX6327UR29-T application, or MAX6327UR29-T equivalent, this page details its precise 2.93V reset threshold behavior, SOT23-3 package compatibility, active-high push-pull output drive capability, transient immunity specifications, and verified drop-in alternatives for µP reset supervision in space-constrained embedded designs.
Technical Context
The MAX6327UR29-T implements a precision bandgap-based voltage comparator with hysteresis (6.3mV) to detect VCC falling below 2.93V and hold RESET high for ≥100ms after VCC rises above threshold. Its internal reset timer is fully specified from –40°C to +85°C and immune to transients up to 200µs at 100mV overdrive.
This device operates across 1.2V–5.5V VCC range, draws ≤1.0µA at 3V (typical), and asserts RESET high while VCC remains below threshold or during the 100–280ms timeout window. Its push-pull output drives loads up to 500µA with VOH ≥0.8·VCC and VOL ≤0.4V under defined sink conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V (±1.5% at +25°C; ±2.5% over –40°C to +85°C) - ensures accurate brownout detection for 3.0V nominal rails. |
| Supply Current | ≤1.0µA max at VCC = 3.2V - enables multi-year battery life in portable equipment. |
| Reset Timeout | 100ms minimum (100–280ms typical) - meets µP power-on initialization timing requirements. |
| Output Type | Active-high push-pull - eliminates external pull-up resistor, simplifies interface to µP reset inputs. |
| VCC Operating Range | 1.2V to 5.5V - supports operation during deep brownout and compatibility with 1.2V–5V logic families. |
| Reset Hysteresis | 6.3mV - prevents chatter during slow VCC recovery near threshold. |
| Transient Immunity | Rejects negative VCC glitches ≤200µs at 100mV overdrive - improves system robustness in noisy environments. |
Pinout & Package
MAX6327UR29-T is housed in a 3-pin SOT23-3 package (outline 21-0051), with 1.3mm × 2.9mm footprint and 0.95mm height - optimized for high-density 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 reset output | Drives high (≥0.8·VCC) when VCC ≥2.93V and timeout complete; drives low (≤0.4V) during reset assertion - directly interfaces µP reset pins without external components. |
| 3 (VCC) | Supply input | Monitored power rail input; accepts 1.2V–5.5V; internal circuitry remains functional down to 1.2V for brownout detection. |
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 2.93V reset threshold | Factory-trimmed ±1.5% tolerance ensures consistent brownout response across production lots without calibration. |
| Guaranteed operation down to 1.2V VCC | Allows reliable reset assertion even during severe undervoltage conditions before system collapse. |
| No external components required | Integrates voltage reference, comparator, timer, and push-pull driver - reduces BOM count and layout area by ≥3 parts. |
| Transient-immune reset detection | Rejects VCC glitches <200µs duration - prevents spurious resets in electrically noisy industrial or automotive environments. |
Applications
| Battery-Powered Data Loggers | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Long-term environmental sensor nodes powered by CR2032 cells, logging temperature/humidity every 5 minutes. IC Role / Device Role / Timing Role: Supervises 3.0V LDO output; asserts active-high RESET to MSP430 µP during battery voltage decay below 2.93V. Use Value: Prevents corrupted flash writes and state corruption by ensuring µP only operates within valid supply range, extending usable battery life by avoiding premature shutdown. |
Use Scenario: DIN-rail mounted analog input module exposed to 24V DC field wiring with EMI and load-switching transients. IC Role / Device Role / Timing Role: Monitors isolated 3.3V supply feeding ARM Cortex-M4; holds RESET high for ≥100ms after power restoration following brief AC line dips. Use Value: Eliminates firmware lockup due to marginal VCC during transient recovery, improving MTBF in unattended factory-floor deployments. |
| Medical Wearable Monitors | Smart Energy Meters |
Use Scenario: ECG patch with Bluetooth LE radio, operating on rechargeable Li-ion cell with 2.8–4.2V range. IC Role / Device Role / Timing Role: Tracks regulated 3.0V rail; triggers active-high RESET to nRF52840 when VCC drops below 2.93V during end-of-charge. Use Value: Ensures safe graceful shutdown before brownout-induced memory corruption, preserving last-recorded vital signs data. |
Use Scenario: ANSI C12.20-compliant electricity meter with dual-supply MCU (1.8V core, 3.3V I/O) and isolated RS-485 interface. IC Role / Device Role / Timing Role: Supervises 3.3V I/O rail; provides 100ms+ reset pulse to guarantee proper initialization of metrology ADC and communication peripherals after power cycling. Use Value: Meets strict reset timing compliance for revenue-grade metering firmware, preventing invalid billing cycles due to incomplete boot sequence. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6327XR29-T | Identical electrical specs and 2.93V threshold, but in SC70-3 package (1.25mm × 2.0mm vs. SOT23's 1.3mm × 2.9mm). | Preferred where board area is more constrained than height; same thermal performance but different land pattern. | Select for ultra-dense layouts where SC70 footprint saves >15% PCB area versus SOT23. |
| MAX809TR33D3T-T | 3.3V reset threshold (not 2.93V); 1.6µA max ICC; push-pull output; same SOT23-3 package. | Requires redesign if system operates near 3.0V nominal - may assert reset prematurely during normal 3.0V ±5% tolerance operation. | Only suitable if target supply is 3.3V ±3% and higher supply current is acceptable; not a direct replacement for 2.93V monitoring. |
Compared with MAX6327UR29-T, the MAX6327XR29-T offers identical functionality in a smaller-footprint SC70 package, while the MAX809TR33D3T-T provides a higher 3.3V threshold with increased supply current - making the former a true footprint-alternative and the latter a functionally distinct option requiring voltage-margin validation.
Availability
MAX6327UR29-T is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial control modules, and medical wearable devices requiring stable component supply with guaranteed long-term availability and RoHS-compliant sourcing.
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, with emphasis on high-reliability, low-power solutions for industrial and portable systems.
The MAX6326/MAX6327/MAX6328 family was engineered specifically for ultra-low-power microprocessor reset supervision in space- and energy-constrained embedded systems, prioritizing sub-µA quiescent current and guaranteed operation across wide VCC and temperature ranges.
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 to ±1.5% at +25°C and ±2.5% over the full –40°C to +85°C operating temperature range. This specification is guaranteed per datasheet Electrical Characteristics table and ensures consistent brownout detection across environmental conditions without user calibration.
Does MAX6327UR29-T require any external components to function as a reset supervisor?
No, the MAX6327UR29-T requires zero external components. It integrates a precision voltage reference, comparator, reset timer, and active-high push-pull output driver. The device connects directly between VCC, GND, and the µP RESET pin - eliminating pull-up resistors, capacitors, or trimming networks traditionally needed in discrete reset circuits.
Can MAX6327UR29-T operate reliably when the supply voltage drops below 2.0V?
Yes, the MAX6327UR29-T is fully specified to operate and assert reset correctly down to VCC = 1.2V. Its internal circuitry remains functional and maintains proper reset state integrity even during deep brownout conditions, enabling robust fail-safe behavior in systems with collapsing power rails.
What is the maximum duration of VCC transient that MAX6327UR29-T can ignore without generating a false reset?
The MAX6327UR29-T ignores negative-going VCC transients up to 200µs in duration when the overdrive (VTH – VCC) is 100mV, as confirmed by the "Maximum Transient Duration vs. Reset Threshold Overdrive" graph in the datasheet. This immunity prevents spurious resets caused by switching noise or load transients in real-world PCB environments.
Is MAX6327UR29-T pin-compatible with other members of the MAX632x family?
Yes, MAX6327UR29-T shares identical SOT23-3 pinout (GND, RESET, VCC) with all MAX6326/6327/6328/6346/6347/6348 variants in the UR_-T package. This allows direct substitution within the same family for different reset thresholds or output types (e.g., swapping MAX6327UR29-T for MAX6328UR29-T requires only changing firmware handling of active-high vs. active-low logic).
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:
- Obsolete
- 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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