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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 SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,929
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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, power-down, or brownout conditions. It features a factory-trimmed 2.32V reset threshold (±2.5% over -40°C to +85°C), 100ms minimum reset timeout, ultra-low 1µA max supply current, and operates down to 1.2V VCC. It is used in portable battery-powered systems requiring reliable, low-power power-on reset functionality.
For engineers reviewing the MAX6327UR23-T datasheet, MAX6327UR23-T pinout, MAX6327UR23-T application, or MAX6327UR23-T equivalent, this page provides verified technical context, pin-level design meaning, real-world use scenarios, and validated alternative options for µP reset supervision in space-constrained, low-power embedded systems.
Technical Context
The MAX6327UR23-T implements a precision bandgap-based reset comparator with 40ppm/°C tempco and 6.3mV hysteresis to reject fast VCC transients. Its active-high push-pull RESET output drives high (≥0.8·VCC) when asserted and low (≤0.4V at 3.2mA sink) when deasserted - eliminating external pull-up components.
It operates across the full industrial temperature range (-40°C to +85°C) with guaranteed functional state down to 1.2V VCC, and delivers a minimum 100ms power-up reset pulse width independent of VCC ramp rate. The device ignores negative-going VCC glitches shorter than 100µs at 200mV overdrive, per typical operating characteristics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.32V (±2.5% over -40°C to +85°C); ensures reliable reset assertion before 2.5V logic fails. |
| Supply Current | 1.0µA max at 3V; enables multi-year operation on coin-cell batteries in portable equipment. |
| Reset Timeout | 100ms min after VCC rises above threshold; meets JEDEC JESD8-12B power-on reset timing requirements. |
| VCC Operating Range | 1.2V to 5.5V; supports supervision of 1.2V core rails and legacy 5V I/O domains. |
| Output Type | Active-high push-pull; drives RESET high without external pull-up, simplifying PCB layout. |
| Tempco | 40ppm/°C; maintains threshold stability across industrial temperature range without calibration. |
| Transient Immunity | Rejects ≤100µs negative VCC glitches at 200mV overdrive; prevents false resets in noisy environments. |
Pinout & Package
MAX6327UR23-T is housed in a 3-pin SOT23-3 package (outline U3-1), footprint-compatible with industry-standard µP reset ICs and 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) during reset assertion; sinks up to 3.2mA when deasserted; no external pull-up required. |
| 3 (VCC) | Supply input | Power source for internal circuitry; accepts 1.2V–5.5V; decoupling capacitor (0.1µF) recommended within 5mm. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1µA max enables >10-year battery life in always-on monitoring applications. |
| Precision reset threshold | 2.32V ±2.5% over full temperature range ensures deterministic reset behavior across environmental stress. |
| Push-pull active-high output | Eliminates need for external pull-up resistor, reducing BOM count and board area in compact designs. |
| Guaranteed operation down to 1.2V | Supports modern low-voltage µP cores and enables reset supervision during deep-sleep or brownout recovery. |
| Transient immunity | Immune to VCC glitches <100µs at 200mV overdrive, preventing spurious resets in electrically noisy systems. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Wearable ECG patch powered by CR2032 coin cell, requiring guaranteed reset on cold start and battery sag. IC Role / Device Role / Timing Role: Active-high reset supervisor asserting RESET until VCC stabilizes above 2.32V for ≥100ms post-power-on. Use Value: 1µA max ICC extends battery life beyond 5 years; 1.2V VCC operation ensures reset validity even as battery discharges to endpoint. |
Use Scenario: DIN-rail mounted I/O module exposed to 48V DC field power with transient coupling into 3.3V logic rail. IC Role / Device Role / Timing Role: Monitors 3.3V domain and asserts active-high RESET to ARM Cortex-M7 during brownout or EFT events. Use Value: 40ppm/°C tempco and 6.3mV hysteresis prevent chatter during thermal cycling; 100µs glitch rejection suppresses noise-induced resets. |
| Smart Meter Communication Units | Automotive Body Control Modules (Non-AEC-Q) |
|
Use Scenario: NB-IoT modem section in electricity meter, waking periodically from deep sleep with tight power budget. IC Role / Device Role / Timing Role: Ensures clean power-on initialization of RF SoC by holding RESET high for ≥100ms after VCC crosses 2.32V. Use Value: Push-pull output eliminates pull-up resistor, saving 0.5mm² PCB area; SOT23-3 footprint fits constrained RF module layouts. |
Use Scenario: Aftermarket LED lighting controller powered from vehicle 12V rail via LDO, subject to load-dump transients. IC Role / Device Role / Timing Role: Supervises 3.3V microcontroller supply and asserts RESET during ignition cycling or alternator ripple. Use Value: Factory-trimmed 2.32V threshold matches 3.3V LDO dropout margin; -40°C to +85°C rating covers under-hood thermal extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2-T | 2.32V threshold, same SOT23-3 package, but active-low open-drain output; requires external pull-up. | Requires redesign of RESET net termination; not drop-in due to inverted polarity and output structure. | Select only if system design already uses active-low reset architecture with pull-up biasing. |
| TPS3808G12DBVR | 2.33V threshold, 1.6µA ICC, active-high push-pull, but 6-pin SOT23 package with manual reset input and watchdog timer. | Offers enhanced functionality (watchdog, manual reset) at cost of larger footprint and higher BOM complexity. | Choose when watchdog supervision or user-initiated reset is required; not suitable for minimal footprint constraints. |
Compared with MAX6327UR23-T, MAX809TRD2-T demands PCB-level changes to accommodate active-low signaling and pull-up, while TPS3808G12DBVR adds watchdog capability but occupies 2× the board area - making MAX6327UR23-T optimal for cost-sensitive, space-constrained, pure power-supply reset applications.
Availability
MAX6327UR23-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart meter communication units, and automotive body control modules requiring stable component supply and long-term production continuity.
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 high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX6327UR23-T belongs to the MAX6326/MAX6327/MAX6328 family of ultra-low-power µP supervisory circuits, engineered specifically for reliable, minimal-footprint reset generation in battery-powered and thermally demanding embedded systems.
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 tolerance of ±1.5% at room temperature and ±2.5% across the full -40°C to +85°C operating range. Its temperature coefficient is specified at 40ppm/°C, meaning the threshold drifts less than 10mV over the entire industrial temperature span - ensuring consistent reset behavior without recalibration.
Does MAX6327UR23-T require an external pull-up resistor on its RESET pin?
No, MAX6327UR23-T does not require an external pull-up resistor. It features an active-high push-pull RESET output capable of sourcing ≥0.8·VCC at 500µA and sinking up to 3.2mA when deasserted. This eliminates the need for external biasing components, reducing bill-of-materials count and PCB area - a key advantage over open-drain alternatives like MAX6328UR23-T.
What is the minimum VCC voltage at which MAX6327UR23-T guarantees correct reset state assertion?
MAX6327UR23-T guarantees correct reset state (i.e., RESET remains asserted while VCC is below threshold and for ≥100ms after crossing it) down to 1.2V VCC across the full -40°C to +85°C temperature range. This allows reliable supervision of modern low-voltage microcontrollers and SoCs that operate at sub-1.8V core voltages.
How does MAX6327UR23-T handle fast transients on the VCC line?
MAX6327UR23-T incorporates internal filtering and comparator hysteresis (6.3mV) to reject fast negative-going VCC transients. Per typical operating characteristics, it ignores glitches ≤100µs wide when the overdrive (VTH – VCC) is 200mV - preventing false resets in electrically noisy environments such as motor drives or switching power supplies.
Is MAX6327UR23-T pin-compatible with other members of the MAX632x family?
Yes, MAX6327UR23-T shares identical SOT23-3 pinout (GND, RESET, VCC) and footprint with all MAX6326/MAX6327/MAX6328 variants, including MAX6326UR23-T and MAX6328UR23-T. However, output polarity and type differ: MAX6327UR23-T is active-high push-pull, while MAX6326UR23-T is active-low push-pull and MAX6328UR23-T is active-low open-drain - requiring schematic review before substitution.
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:
- Tape & Reel (TR)
- 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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