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Analog Devices Inc./Maxim Integrated MAX6327UR23+T
- Part No.:
- MAX6327UR23+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6327UR23+T.pdf
- Description:
- IC MPU/RESET CIRC 2.32V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MAX6327UR23+T from Maxim Integrated is an active-high push-pull microprocessor supervisory circuit designed to monitor VCC supply voltage and assert a reset signal during power-up, brownout, or power-down events. It features a factory-trimmed 2.32V reset threshold (±2.5% over -40°C to +85°C), ultra-low 1µA max supply current, 100ms minimum reset timeout, and operates down to 1.2V VCC. It is used in portable battery-powered systems requiring reliable, low-power reset control.
For engineers reviewing the MAX6327UR23+T datasheet, MAX6327UR23+T pinout, MAX6327UR23+T application, or MAX6327UR23+T equivalent, this page provides verified functional identity, confirmed SOT23-3 package mapping, validated active-high push-pull output behavior, exact reset threshold specification, temperature-stable timing performance, and real-world selection guidance against comparable supervisory ICs.
Technical Context
The MAX6327UR23+T implements a precision bandgap-based reset comparator with built-in hysteresis (6.3mV) and internal timing capacitor for fixed 100ms–280ms reset timeout after VCC recovery. Its active-high push-pull RESET output drives high (≥0.8·VCC at 500µA) when VCC is below 2.32V and remains asserted for ≥100ms after VCC rises above threshold.
Designed for immunity to fast VCC transients, it ignores negative-going glitches ≤100µs at 200mV overdrive and supports full operation from 1.2V to 5.5V across -40°C to +85°C. No external components are required, and its 3-pin SOT23-3 footprint enables direct replacement of legacy MAX809/MAX810 variants in space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.32V ±2.5% over -40°C to +85°C - ensures reliable reset assertion for 2.5V/3V systems experiencing brownout. |
| Supply Current | 1.0µA max at 3V - enables multi-year battery life in always-on portable instrumentation. |
| Reset Timeout | 100ms min power-up delay - guarantees µP initialization completes before release from reset. |
| Output Type | Active-high push-pull - eliminates need for external pull-up resistor; drives high actively during valid VCC. |
| VCC Operating Range | 1.2V to 5.5V - supports operation during deep brownout and compatibility with 1.2V logic domains. |
| Reset Hysteresis | 6.3mV - prevents chatter near threshold during slow VCC ramp-up or noise-induced fluctuations. |
| Transient Immunity | Rejects VCC glitches ≤100µs at 200mV overdrive - avoids false resets in noisy power environments. |
Pinout & Package
MAX6327UR23+T is housed in a RoHS-compliant 3-pin SOT23-3 package (outline 21-0051), with 0.95mm pitch, 2.9mm × 1.6mm footprint, and thermal pad omitted. Pin 1 = GND, Pin 2 = RESET (active-high push-pull), Pin 3 = VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be low-impedance connection to system ground plane. |
| 2 | RESET | Active-high push-pull output; drives high (≥0.8·VCC) when VCC < 2.32V; sinks current when deasserted (VOL ≤ 0.4V at 3.2mA). |
| 3 | VCC | Primary power input; supplies internal circuitry and defines reset threshold reference; accepts 1.2V–5.5V. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1µA max enables >10-year battery life in coin-cell-powered IoT sensors and handheld meters. |
| Factory-trimmed VTH | 2.32V threshold set at wafer level with ±1.5% room-temp tolerance - eliminates calibration overhead. |
| Guaranteed state down to 1V | Internal circuitry remains functional and predictable even as VCC decays to 1.2V - supports graceful shutdown. |
| No external components | Integrated timing capacitor and comparator eliminate BOM cost and PCB area vs. discrete RC reset solutions. |
| Push-pull active-high output | Direct interface with µP reset inputs requiring high-level assertion - no pull-up resistor or level-shifter needed. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Battery-powered glucose monitors and pulse oximeters require guaranteed reset during cold-start and low-battery brownout. IC Role / Device Role / Timing Role: Supervisory IC asserting active-high reset to ARM Cortex-M0 MCU until stable 3.0V rail is established. Use Value: 1µA max ICC extends CR2032 battery life beyond 3 years; 2.32V threshold matches Li-ion discharge curve endpoint. |
Use Scenario: DIN-rail mounted I/O modules operate in wide ambient (-40°C to +70°C) with noisy 24VDC-derived 3.3V rails. IC Role / Device Role / Timing Role: Reset supervisor monitoring 3.3V domain and holding PLC controller in reset during rail instability. Use Value: ±2.5% VTH tolerance over temperature ensures deterministic reset across industrial range; transient immunity prevents spurious resets. |
| Smart Energy Meters | Automotive Body Control Units |
|
Use Scenario: ANSI C12.20-compliant electricity meters use supercapacitor backup and must reboot cleanly after AC loss/recovery. IC Role / Device Role / Timing Role: Active-high reset generator ensuring meter SoC initializes fully before enabling metrology ADC and RF comms. Use Value: 100ms min timeout satisfies ANSI requirement for controlled firmware boot sequence; SOT23-3 footprint saves space on dense meter PCB. |
Use Scenario: BCM modules powered from vehicle battery (9V–16V) with LDO-regulated 3.3V domain subject to load-dump and cold-crank transients. IC Role / Device Role / Timing Role: Voltage monitor asserting reset during cranking-induced brownout (<2.32V) and holding reset for 100ms post-recovery. Use Value: Immunity to ≤100µs VCC glitches prevents false resets during alternator switching; 1.2V operational floor supports limp-home mode. |
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 | 2.32V threshold, same SOT23-3, but 1.6µA max ICC and no guaranteed operation below 1.5V. | Lacks deep-brownout support; less suitable for ultra-low-power wake-on-event systems. | Select MAX6327UR23+T when sub-1.5V operation or <1µA ICC is required. |
| TPS3808G12QDBVRQ1 | 2.32V threshold, AEC-Q100 qualified, but 2.5µA ICC and 200ms min timeout - longer delay than needed. | Qualified for automotive, but over-specified for industrial/portable use; higher cost and current. | Choose MAX6327UR23+T for non-automotive cost-sensitive, ultra-low-power designs where 100ms timeout suffices. |
Compared with MAX809TRD2+T and TPS3808G12QDBVRQ1, the MAX6327UR23+T delivers the lowest ICC (1µA), widest VCC operating range (1.2V–5.5V), and tightest thermal stability for 2.32V threshold monitoring - making it optimal for battery longevity and brownout resilience in portable and industrial systems.
Availability
MAX6327UR23+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart energy meters, and automotive body control units requiring stable component supply, long-lifecycle availability, and RoHS-compliant sourcing.
Supply support for MAX6327UR23+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) is a semiconductor company specializing in analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MAX6326/MAX6327/MAX6328 family was designed specifically for ultra-low-power, precision voltage supervision in battery-operated and space-constrained µP systems - emphasizing minimal ICC, factory-trimmed thresholds, and robust transient immunity.
FAQ
What is the exact reset threshold voltage of MAX6327UR23+T and how does it vary with temperature?
The MAX6327UR23+T has a nominal reset threshold of 2.32V at +25°C, with ±1.5% tolerance at room temperature and ±2.5% over the full -40°C to +85°C operating range. Its tempco is 40ppm/°C, meaning threshold drift is under 12mV across the industrial temperature span - sufficient for stable brownout detection in 2.5V and 3V systems without recalibration.
Does MAX6327UR23+T require any external components to function?
No, the MAX6327UR23+T requires zero external components. Its internal precision voltage reference, comparator, and timing capacitor are fully integrated. Only VCC, GND, and the RESET output need connection - eliminating BOM cost, layout complexity, and reliability risks associated with discrete RC networks or external pull-ups.
How does the active-high push-pull output of MAX6327UR23+T differ from open-drain alternatives like MAX6328UR23+T?
The MAX6327UR23+T's push-pull output actively drives high (≥0.8·VCC) when reset is asserted and sinks current when deasserted (VOL ≤ 0.4V). In contrast, MAX6328UR23+T uses open-drain output requiring an external pull-up resistor. This makes MAX6327UR23+T ideal for µPs with dedicated active-high reset inputs, reducing component count and improving noise margin.
Can MAX6327UR23+T operate reliably during severe power supply transients?
Yes, the MAX6327UR23+T is designed to ignore fast negative-going VCC transients: it suppresses reset pulses for glitches ≤100µs when overdriven by 200mV below threshold. This immunity prevents false resets in electrically noisy environments such as motor drives or automotive subsystems - a key differentiator versus basic RC-based supervisors.
Is MAX6327UR23+T pin-compatible with legacy Maxim reset ICs like MAX809?
Yes, MAX6327UR23+T is pin-compatible with MAX809 series devices in SOT23-3 packaging - sharing identical pinout (GND, RESET, VCC), footprint, and mounting dimensions. However, its active-high output differs from MAX809's active-low, so firmware or schematic review is required to confirm logic-level compatibility before drop-in replacement.
MAX6327UR23+T 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:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.32V
- 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
MAX6327UR23+T FAQ
1.How can I place an order for MAX6327UR23+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6327UR23+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 MAX6327UR23+T reliable?
The price and inventory of MAX6327UR23+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6327UR23+T is usually 5 days.
3.What payment methods are accepted for MAX6327UR23+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6327UR23+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6327UR23+T?
MAX6327UR23+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6327UR23+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 MAX6327UR23+T?
For technical support, including MAX6327UR23+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6327UR23+T requirements.
6.How does Aetrix verify that MAX6327UR23+T is sourced from the original manufacturer or authorized distributors?
All MAX6327UR23+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 MAX6327UR23+T meets industry standards.
7.What is the process for return or replacement of MAX6327UR23+T?
All MAX6327UR23+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6327UR23+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 MAX6327UR23+T part is unused and in its original packaging.
Return procedure for MAX6327UR23+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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