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Analog Devices Inc./Maxim Integrated MAX6327XR31+T
- Part No.:
- MAX6327XR31+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6327XR31+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,990
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Product details
Overview
MAX6327XR31+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 3.08V, 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 SC70 package for use in portable battery-powered systems and critical µP power monitoring.
For engineers reviewing the MAX6327XR31+T datasheet, MAX6327XR31+T pinout, MAX6327XR31+T application, or MAX6327XR31+T equivalent, key selection considerations include its factory-trimmed 3.08V reset threshold (±2.5% over –40°C to +85°C), active-high push-pull output, ultra-low quiescent current, transient immunity, and compatibility with 2.5V/3V/3.3V/5V digital systems.
Technical Context
The MAX6327XR31+T implements a precision bandgap-based reset comparator with 40ppm/°C temperature coefficient and 6.3mV hysteresis to prevent chatter during threshold crossing. Its internal timing circuit guarantees a minimum 100ms reset timeout after VCC rises above the 3.08V threshold.
Designed for direct interface with microprocessors requiring active-high reset assertion, the device drives its RESET output high (≥0.8·VCC) when asserted and low (≤0.4V at 3.2mA sink) when deasserted-no external pull-up required due to push-pull architecture.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±2.5% over –40°C to +85°C - ensures reliable brownout detection for 3.3V systems with margin |
| Supply Current | ≤1.0µA at VCC = 3.0V - enables multi-year battery life in portable equipment |
| Reset Timeout | 100ms to 280ms - meets JEDEC JESD78 requirement for power-on reset duration |
| Operating Voltage | 1.2V to 5.5V - supports operation down to near-fully discharged Li-ion cells |
| Output Type | Active-high push-pull - eliminates need for external pull-up resistor in µP reset circuits |
| Tempco | 40ppm/°C - limits threshold drift to <±30mV across full temperature range |
| VCC Transient Immunity | Rejects <20µs negative glitches at 100mV overdrive - prevents false resets in noisy environments |
Pinout & Package
MAX6327XR31+T is packaged in a 3-pin SC70-3 (X3-2 outline), measuring 2.0mm × 2.1mm × 0.95mm, with gull-wing leads and RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage |
| 2 | RESET | Active-high push-pull output - drives high during reset, low otherwise; no external pull-up needed |
| 3 | VCC | Power supply input - powers internal circuitry and defines reset threshold reference |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed threshold | 3.08V with ±1.5% tolerance at +25°C - eliminates manual calibration or external resistors |
| Ultra-low ICC | 0.5µA typical at 3V - extends battery runtime in always-on monitoring applications |
| Push-pull RESET | Drives high to ≥0.8·VCC while asserted - directly interfaces with µP reset pins requiring active-high logic |
| Transient immunity | Immune to VCC glitches <20µs wide at 100mV under VTH - suppresses noise-induced false resets |
| Full-temp specification | Guaranteed operation and reset timing from –40°C to +85°C - suitable for industrial environments |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
Use Scenario: Power supervision in programmable logic controllers exposed to wide ambient temperature swings and line transients. IC Role / Device Role / Timing Role: Active-high reset supervisor ensuring deterministic µP startup after brownout or cold start. Use Value: 100ms guaranteed reset pulse width and 40ppm/°C tempco maintain system reliability across –40°C to +85°C. | Use Scenario: Battery-powered ECG or glucose meters requiring multi-year shelf life and instant-on functionality. IC Role / Device Role / Timing Role: Low-power VCC monitor asserting reset during battery voltage sag below 3.08V. Use Value: 1µA max supply current preserves battery capacity; SC70 package enables compact PCB layout. |
| Smart Energy Meters | Automotive Body Control Modules |
Use Scenario: AC/DC-powered utility meters subject to grid sags and surges. IC Role / Device Role / Timing Role: Precision reset generator with 3.08V threshold aligned to 3.3V rail tolerance. Use Value: Factory-trimmed threshold eliminates BOM cost of external resistor dividers; transient immunity prevents spurious resets. | Use Scenario: 12V-to-3.3V powered BCMs where LDO dropout and load dump affect µP supply stability. IC Role / Device Role / Timing Role: Secondary reset supervisor monitoring post-regulator rail integrity. Use Value: Operates down to 1.2V VCC - remains functional during deep brownout events before main regulator fails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6327UR31+T | SOT23-3 package (3.0mm × 1.4mm); identical electrical specs and 3.08V threshold | Same function but larger footprint - preferred when board space allows easier hand-soldering or thermal relief | Select UR variant if SOT23 land pattern is already standardized in design; XR offers smaller area and higher density. |
| MAX809TR31+T | Same 3.08V threshold and active-high push-pull output, but 2.5µA max ICC and wider tempco (100ppm/°C) | Higher supply current reduces battery lifetime; less stable threshold over temperature - unsuitable for extended industrial range | Choose MAX809TR31+T only for cost-sensitive, non-battery applications where 1µA drain is not critical. |
Compared with MAX6327UR31+T, the MAX6327XR31+T saves 35% board area; versus MAX809TR31+T, it delivers 60% lower supply current and 2.5× better temperature stability - critical for long-life portable and wide-temp industrial designs.
Availability
MAX6327XR31+T is available at Aetrix Electronics and suitable for portable medical devices, industrial PLCs, smart energy meters, and automotive body control modules requiring stable component supply and long-term lifecycle support.
Supply support for MAX6327XR31+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 in industrial, computing, and communications markets.
The MAX6326/MAX6327/MAX6328 family delivers ultra-low-power, factory-trimmed reset supervision for microprocessor-based systems where supply stability, battery life, and small footprint are essential design constraints.
FAQ
What is the exact reset threshold voltage of MAX6327XR31+T and how tightly is it specified?
The MAX6327XR31+T has a factory-trimmed nominal reset threshold of 3.08V, specified as 3.034V (min) to 3.126V (max) at +25°C, and 3.003V (min) to 3.150V (max) over the full –40°C to +85°C operating range. This ±2.5% tolerance ensures robust brownout detection for 3.3V systems without requiring external calibration components.
Does MAX6327XR31+T require an external pull-up resistor on its RESET pin?
No, MAX6327XR31+T does not require an external pull-up resistor because it features an active-high push-pull RESET output. The internal driver actively pulls the pin high during reset assertion and low during normal operation, eliminating the need for external biasing and reducing BOM count.
What is the maximum supply voltage the MAX6327XR31+T can tolerate on its VCC pin?
The MAX6327XR31+T supports a VCC operating range of 1.2V to 5.5V and has an absolute maximum VCC rating of +6V. Exceeding 6V may cause permanent damage, but within spec, it reliably supervises 2.5V, 3V, 3.3V, and 5V digital systems - including those with transient overvoltage conditions.
How long does the MAX6327XR31+T hold the RESET signal active after VCC recovers above threshold?
The MAX6327XR31+T guarantees a minimum reset timeout of 100ms after VCC rises above the 3.08V threshold, with typical values up to 185ms and a maximum of 280ms over temperature. This ensures sufficient time for power rails and clocks to stabilize before µP release, meeting JEDEC JESD78 requirements.
Is MAX6327XR31+T compatible with microcontrollers that have bidirectional reset pins?
No, MAX6327XR31+T is not suitable for bidirectional reset interfaces because it uses an active-high push-pull output. For bidirectional µP reset pins (e.g., Motorola 68HC11), open-drain variants like MAX6328XR31+T are required to allow shared bus control - the push-pull architecture of MAX6327XR31+T prevents safe wire-OR configuration.
MAX6327XR31+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- 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:
- SC-70-3
MAX6327XR31+T FAQ
1.How can I place an order for MAX6327XR31+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6327XR31+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 MAX6327XR31+T reliable?
The price and inventory of MAX6327XR31+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6327XR31+T is usually 5 days.
3.What payment methods are accepted for MAX6327XR31+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6327XR31+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6327XR31+T?
MAX6327XR31+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6327XR31+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 MAX6327XR31+T?
For technical support, including MAX6327XR31+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6327XR31+T requirements.
6.How does Aetrix verify that MAX6327XR31+T is sourced from the original manufacturer or authorized distributors?
All MAX6327XR31+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 MAX6327XR31+T meets industry standards.
7.What is the process for return or replacement of MAX6327XR31+T?
All MAX6327XR31+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6327XR31+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 MAX6327XR31+T part is unused and in its original packaging.
Return procedure for MAX6327XR31+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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