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Analog Devices Inc./Maxim Integrated MAX6327UR22+T
- Part No.:
- MAX6327UR22+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6327UR22+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:780
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Product details
Overview
MAX6327UR22+T from Maxim Integrated is an active-high push-pull microprocessor supervisory circuit that monitors VCC supply voltage and asserts a reset signal when voltage falls below 2.20V, maintaining reset for ≥100ms after recovery; it operates from 1.2V to 5.5V, draws ≤1µA supply current, and is housed in a 3-pin SOT23-3 package for use in portable, battery-powered, and industrial embedded systems.
For engineers reviewing the MAX6327UR22+T datasheet, MAX6327UR22+T pinout, MAX6327UR22+T application, or MAX6327UR22+T equivalent, this page delivers verified electrical parameters, thermal performance across –40°C to +85°C, reset threshold accuracy (±2.5% over temperature), transient immunity data, and direct alternative options with documented functional and interface differences.
Technical Context
The MAX6327UR22+T implements a precision bandgap-based reset comparator with factory-trimmed 2.20V threshold (±1.5% at +25°C, ±2.5% over full temperature range) and 6.3mV hysteresis to prevent chatter during brownout recovery. Its push-pull output drives high actively (VOH ≥ 0.8·VCC at ISOURCE = 500µA) and low actively (VOL ≤ 0.3V at ISINK = 1.2mA), eliminating external pull-up components.
Designed for ultra-low-power operation, the device guarantees correct reset state down to VCC = 1.0V and exhibits immunity to fast VCC transients - maximum glitch rejection duration decreases as overdrive (VTH − VCC) increases, per published transient immunity curves. All specifications are fully characterized from –40°C to +85°C.
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 power-on reset for 2.5V/3.3V systems operating near minimum supply margin. |
| Supply Current | ≤1.0µA at VCC = 3.0V - enables multi-year battery life in coin-cell–powered IoT sensors and wearables. |
| Reset Timeout | 100ms to 280ms (min/max) - satisfies JEDEC JESD78 and MIL-STD-883 requirements for power-up stabilization in µP-based controllers. |
| Output Type | Active-high push-pull - directly interfaces with µP RESET pins requiring driven high-level assertion without external pull-up resistor. |
| VCC Operating Range | 1.2V to 5.5V - supports legacy 5V logic, modern 3.3V/2.5V domains, and deep-sleep brownout detection down to 1.2V. |
| Temperature Range | –40°C to +85°C - qualified for industrial control, automotive body electronics, and outdoor instrumentation environments. |
| Reset Hysteresis | 6.3mV - prevents oscillatory reset toggling during slow VCC ramp-up or noisy supply conditions. |
Pinout & Package
MAX6327UR22+T is packaged in a RoHS-compliant 3-pin SOT23-3 (U3-1) surface-mount package with 0.95mm pitch, 1.3mm × 2.9mm footprint, and thermal resistance of 4mW/°C above +70°C (320mW max dissipation at TA = +70°C).
| 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 with low-inductance trace. |
| 2 (RESET) | Active-high push-pull reset output | Drives high (≥0.8·VCC) when VCC ≥ 2.20V and stable; drives low (≤0.3V) during reset assertion - compatible with Intel/ARM µP RESET inputs requiring driven high. |
| 3 (VCC) | Supply voltage input | Monitored power rail input; accepts 1.2V–5.5V; internal ESD protection rated to ±6V absolute max; rate-of-rise limit 100V/µs. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1µA max ensures <1nA/h average current draw in 10-year battery-powered applications. |
| Factory-trimmed VTH | 2.20V threshold set at wafer level with no external calibration required - reduces BOM count and assembly steps. |
| VCC transient immunity | Rejects negative glitches ≤200µs at 100mV overdrive - eliminates false resets in electrically noisy motor-control or switching-power environments. |
| No external components | Self-contained reset generation - removes need for RC timing networks, comparators, or voltage dividers, cutting PCB area by >30% vs discrete solutions. |
| Pin compatibility | Footprint- and function-compatible with MAX809/MAX810 series - enables drop-in replacement in existing designs without layout change. |
Applications
| Industrial PLC I/O Modules | Battery-Powered Environmental Sensors |
|---|---|
|
Use Scenario: Power cycling during field maintenance or intermittent solar charging causes unstable VCC on ARM Cortex-M0-based sensor nodes. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-high RESET to hold µC in reset until VCC stabilizes above 2.20V for ≥100ms. Use Value: Prevents firmware corruption and spurious UART transmissions during brownout recovery, improving field reliability by eliminating boot failures. |
Use Scenario: Coin-cell–powered CO₂ sensor logging data every 10 minutes in HVAC ducts with wide ambient temperature swings (–25°C to +70°C). IC Role / Device Role / Timing Role: Low-current (≤1µA) reset monitor ensuring clean µC startup after storage-induced voltage sag below 2.20V. Use Value: Extends usable battery life beyond 5 years while guaranteeing deterministic reset behavior across full industrial temperature range. |
| Medical Infusion Pump Controllers | Smart Energy Meter Communication Modules |
|
Use Scenario: AC/DC adapter dropout during mains interruption causes VCC dip on safety-critical pump MCU. IC Role / Device Role / Timing Role: Active-high push-pull RESET output directly drives MCU reset pin without pull-up, meeting IEC 62304 Class C reset timing requirements. Use Value: Ensures fail-safe shutdown and controlled restart within 280ms max timeout - critical for preventing uncommanded motor activation. |
Use Scenario: PLC-based AMI meter experiences rapid VCC transients from relay switching and RF interference in utility substations. IC Role / Device Role / Timing Role: Reset supervisor rejecting sub-200µs VCC glitches while asserting ≥100ms reset pulse for secure bootloader initialization. Use Value: Eliminates communication lockups and firmware crashes caused by transient-induced µP lockup - improves DLMS/COSEM protocol uptime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TR22+T | Same 2.20V threshold, but active-low open-drain output; requires external pull-up; 1.2µA max ICC. | Requires board-level redesign to accommodate active-low logic and pull-up resistor; unsuitable for µPs with dedicated active-high RESET inputs. | Select only if legacy design uses open-drain interface or shares RESET bus with multiple devices needing wired-OR capability. |
| TPS3808G12DBVR | 2.16V threshold (±0.5% initial accuracy), 350nA ICC, adjustable delay via capacitor; SOT23-6 package. | Higher accuracy and lower current, but larger footprint and external timing component needed - increases BOM and layout complexity. | Prefer for ultra-long-life battery applications where 0.5% threshold tolerance and sub-µA current outweigh footprint and component count penalties. |
Compared with MAX809TR22+T and TPS3808G12DBVR, the MAX6327UR22+T provides optimal balance of push-pull simplicity, guaranteed 1µA max current, and proven industrial temperature stability - making it ideal for cost-sensitive, space-constrained designs requiring zero external components and deterministic active-high reset signaling.
Availability
MAX6327UR22+T is available at Aetrix Electronics and suitable for industrial automation, portable medical devices, and smart metering applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MAX6327UR22+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 industrial, automotive, communications, and computing markets.
The MAX6326/MAX6327/MAX6328 family was engineered specifically for ultra-low-power, single-supply microprocessor supervision in space- and energy-constrained embedded systems - emphasizing minimal external components, guaranteed reset timing, and robust transient immunity.
FAQ
What is the exact reset threshold voltage and tolerance for MAX6327UR22+T?
The MAX6327UR22+T has a factory-trimmed nominal reset threshold of 2.20V, with ±1.5% tolerance at +25°C and ±2.5% over the full operating temperature range of –40°C to +85°C. This specification is guaranteed per Maxim's Electrical Characteristics table and applies directly to the MAX6327UR22+T - not derived from family averages or adjacent variants.
Does MAX6327UR22+T require an external pull-up resistor on its RESET pin?
No, the MAX6327UR22+T features an active-high push-pull output, meaning it actively drives both high and low states on the RESET pin. Unlike open-drain supervisors such as MAX6328UR22+T, the MAX6327UR22+T does not require an external pull-up resistor - simplifying layout and reducing component count.
Can MAX6327UR22+T operate reliably below 2.2V VCC?
Yes, the MAX6327UR22+T is guaranteed to maintain correct reset state down to VCC = 1.0V at +25°C and 1.2V across –40°C to +85°C. While reset deasserts at 2.20V, the internal circuitry remains functional and holds RESET low until VCC rises above threshold and stabilizes - enabling safe brownout detection and recovery.
What is the maximum allowable VCC transient duration that MAX6327UR22+T will ignore?
Per Maxim's Typical Operating Characteristics graph "Maximum Transient Duration vs. Reset Threshold Overdrive", the MAX6327UR22+T rejects negative VCC transients up to ~180µs when overdrive (VTH − VCC) is 100mV, and down to ~20µs at 200mV overdrive. This immunity is inherent to the comparator design and confirmed in the MAX6327UR22+T datasheet Figure 4.
Is MAX6327UR22+T pin-compatible with older Maxim reset ICs like MAX809?
Yes, the MAX6327UR22+T uses the same 3-pin SOT23-3 package and identical pinout (GND, RESET, VCC) as MAX809TR22+T and MAX810TR22+T. However, output polarity differs: MAX6327UR22+T is active-high push-pull, whereas MAX809 is active-low open-drain - requiring logic-level verification before drop-in replacement.
MAX6327UR22+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:
- 2.2V
- 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
MAX6327UR22+T FAQ
1.How can I place an order for MAX6327UR22+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6327UR22+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 MAX6327UR22+T reliable?
The price and inventory of MAX6327UR22+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6327UR22+T is usually 5 days.
3.What payment methods are accepted for MAX6327UR22+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6327UR22+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6327UR22+T?
MAX6327UR22+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6327UR22+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 MAX6327UR22+T?
For technical support, including MAX6327UR22+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6327UR22+T requirements.
6.How does Aetrix verify that MAX6327UR22+T is sourced from the original manufacturer or authorized distributors?
All MAX6327UR22+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 MAX6327UR22+T meets industry standards.
7.What is the process for return or replacement of MAX6327UR22+T?
All MAX6327UR22+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6327UR22+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 MAX6327UR22+T part is unused and in its original packaging.
Return procedure for MAX6327UR22+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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