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Analog Devices Inc./Maxim Integrated MAX6314US31D1-T
- Part No.:
- MAX6314US31D1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6314US31D1-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,330
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Product details
Overview
MAX6314US31D1-T from Maxim Integrated is a low-power CMOS microprocessor supervisory circuit designed to monitor VCC supply voltage and assert a bidirectional reset signal for µPs with compatible reset I/Os (e.g., 68HC11). It features a factory-trimmed 3.08V reset threshold, 1ms minimum reset timeout period, ±1.8% threshold accuracy at +25°C, 5µA supply current, and SOT143 package. It is used in portable/battery-powered equipment requiring reliable power-on and brownout reset control.
For engineers reviewing the MAX6314US31D1-T datasheet, MAX6314US31D1-T pinout, MAX6314US31D1-T application, or MAX6314US31D1-T equivalent, key selection considerations include its bidirectional RESET output architecture, precise 3.08V threshold, 1ms timeout, immunity to short VCC transients, and compatibility with manual reset inputs in space-constrained embedded systems.
Technical Context
The MAX6314US31D1-T implements a precision voltage-monitoring comparator with laser-trimmed internal resistors to set its 3.08V reset threshold, operating across -40°C to +85°C with ±2.5% accuracy over temperature. Its reset timeout is fixed at 1ms (minimum), generated by an internal one-shot timer that restarts on every VCC dip below threshold or MR assertion.
RESET output combines an N-channel pulldown, P-channel active pullup, and 4.7kΩ passive pullup - enabling direct interface to bidirectional µP reset pins without external components. MR input includes a 63kΩ internal pullup and supports debounced manual reset via momentary switch to GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V nominal; ensures reliable reset assertion when VCC drops below this level in 3.3V-system applications. |
| Reset Timeout Period | 1ms minimum; guarantees reset signal remains asserted long enough for µP initialization after power recovery. |
| Threshold Accuracy | ±1.8% at +25°C; minimizes false resets or missed resets due to tolerance drift at room temperature. |
| Supply Current | 5µA typical at +25°C; enables ultra-low-power operation in battery-backed or energy-sensitive designs. |
| Operating Voltage Range | 1.0V to 5.5V; supports valid RESET output down to 1V VCC, ensuring functionality across wide supply conditions. |
| MR Input Threshold | 0.3 × VCC (min); allows clean logic-low detection even under varying VCC, supporting robust manual reset activation. |
| Reset Output Type | Bidirectional-compatible with active pullup + 4.7kΩ resistor; eliminates need for external pullup and enables µP-driven reset acknowledgment. |
Pinout & Package
SOT143 (4-pin) surface-mount package with exposed pad option; compact 2.9mm × 1.5mm footprint suitable for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply voltage and reset threshold monitor input | Primary power rail connection; internally monitored to trigger reset when falling below 3.08V. |
| MR | Manual reset input | Active-low input with 63kΩ internal pullup; asserts reset when pulled to GND; no external debounce required. |
| RESET | Active-low complementary reset output | Bidirectional-capable output with integrated p-channel pullup and n-channel pulldown; interfaces directly to 68HC11-style reset I/Os. |
| GND | Ground reference | Return path for all internal circuitry and reset output sink current; must be low-impedance for accurate threshold sensing. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional RESET output architecture | Integrates 4.7kΩ pullup + P-channel active pullup + N-channel pulldown to enable µP-initiated reset acknowledgment without external components. |
| Factory-trimmed 3.08V reset threshold | Laser-trimmed internal divider ensures precise trip point matching 3.3V system rails, eliminating calibration or external resistor networks. |
| 1ms minimum reset timeout | Internally timed interval guarantees sufficient reset hold time for µP core and peripheral initialization after VCC recovery. |
| 5µA quiescent current | Enables multi-year battery life in portable instrumentation and remote sensor nodes where standby power is critical. |
| Immunity to short VCC transients | Rejects glitches ≤100ns (at 100mV overdrive), preventing spurious resets during switching noise or ESD events. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered glucose meters and pulse oximeters require guaranteed reset during cold-start and brownout conditions. IC Role / Device Role / Timing Role: MAX6314US31D1-T monitors 3.3V supply and asserts bidirectional reset to ARM Cortex-M0 host MCU during power-up and voltage sags. Use Value: 3.08V threshold aligns with 3.3V LDO dropout margin; 1ms timeout satisfies ARM reset timing requirements; 5µA current extends AA/AAA battery life beyond 2 years. |
Use Scenario: DIN-rail mounted PLC modules operate in electrically noisy factory environments with fluctuating 24VDC-derived 3.3V supplies. IC Role / Device Role / Timing Role: MAX6314US31D1-T provides deterministic reset initiation and manual reset capability via front-panel pushbutton connected to MR. Use Value: MR's 63kΩ internal pullup eliminates external resistor; transient immunity prevents false resets from motor drive noise; SOT143 footprint saves board space in dense I/O carrier designs. |
| Smart Energy Meters | Automotive Body Control Units |
Use Scenario: ANSI C12.20-compliant electricity meters use isolated 3.3V domains powered from line-derived supplies subject to dips and surges. IC Role / Device Role / Timing Role: MAX6314US31D1-T guards the metrology SoC and secure bootloader against corrupted startup due to undervoltage. Use Value: ±2.5% threshold stability over -40°C to +85°C ensures consistent behavior across outdoor temperature extremes; 1ms timeout avoids violating SoC reset timing windows. |
Use Scenario: BCMs integrate LIN, CAN, and power switches, requiring fail-safe reset coordination during vehicle battery load-dump or cranking events. IC Role / Device Role / Timing Role: MAX6314US31D1-T monitors post-regulator 3.3V rail and synchronizes reset assertion with other subsystems via shared RESET bus. Use Value: Bidirectional RESET allows BCM MCU to detect external vs. self-initiated reset sources; SOT143 package meets AEC-Q200 board-level vibration requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US31D1-T | Open-drain RESET output (no active pullup); identical 3.08V threshold and 1ms timeout. | Requires external 4.7kΩ pullup resistor; not compatible with bidirectional µP reset I/Os like 68HC11. | Select when interfacing with standard open-drain–compatible µPs or when active pullup is unnecessary. |
| TPS3808G31DBVR | Fixed 3.08V threshold, 20ms default timeout (adjustable via capacitor), 1.6µA IQ, SOT-23-5 package. | Lacks bidirectional RESET capability; uses separate EN input instead of MR; higher pin count. | Choose for ultra-low-power applications where longer timeout is acceptable and bidirectional signaling is not required. |
Compared with MAX6314US31D1-T, MAX6315US31D1-T removes the active pullup but retains identical monitoring specs-making it a drop-in replacement only if external pullup is added and bidirectional operation is unused. TPS3808G31DBVR offers lower current and adjustable timeout but requires layout changes and cannot support 68HC11-style reset arbitration.
Availability
MAX6314US31D1-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and smart energy meters requiring stable component supply, long-term lifecycle support, and AEC-Q200-aligned reliability.
Supply support for MAX6314US31D1-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, mixed-signal, and power management ICs for industrial, automotive, and computing applications.
The MAX6314 family delivers highly accurate, low-power µP supervisory circuits optimized for systems needing deterministic reset behavior, minimal external components, and compatibility with legacy bidirectional reset architectures.
FAQ
What is the exact reset threshold voltage of the MAX6314US31D1-T?
The MAX6314US31D1-T has a factory-trimmed nominal reset threshold of 3.08V, with ±1.8% accuracy at +25°C and ±2.5% over the full -40°C to +85°C operating range. This value is laser-trimmed during production and specified in the Ordering Information table; it is not user-adjustable.
Does the MAX6314US31D1-T support bidirectional reset communication with microcontrollers?
Yes, the MAX6314US31D1-T features a bidirectional-compatible RESET output that combines an N-channel pulldown, P-channel active pullup, and 4.7kΩ passive pullup. This architecture enables direct interface with µPs like the 68HC11 that use the same pin for both asserting and detecting reset, allowing source identification during boot.
What is the reset timeout period for the MAX6314US31D1-T, and is it adjustable?
The MAX6314US31D1-T has a fixed minimum reset timeout period of 1ms, as indicated by the "D1" suffix in its part number. This timeout is internally generated and non-adjustable; alternative versions (e.g., D2 = 20ms, D3 = 140ms) require different orderable part numbers.
Can the MAX6314US31D1-T operate with supply voltages below 3.08V?
Yes, the MAX6314US31D1-T operates from 1.0V to 5.5V. While RESET is guaranteed active (low) for VCC > 1V, the device continues to function down to 1V - though reset assertion ceases below ~1V as the output transitions to high-impedance. For VCC = 0V operation, an external pull-down resistor on RESET is recommended.
Is a pull-up resistor required on the MR pin of the MAX6314US31D1-T?
No external pull-up resistor is required on the MR pin of the MAX6314US31D1-T because it includes a built-in 63kΩ pull-up resistor. The MR input can be left floating if unused, or connected directly to GND via a momentary switch for manual reset - no external debounce circuitry is needed.
MAX6314US31D1-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- 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:
- Bidirectional
- Reset:
- Active Low
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6314US31D1-T FAQ
1.How can I place an order for MAX6314US31D1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6314US31D1-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 MAX6314US31D1-T reliable?
The price and inventory of MAX6314US31D1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6314US31D1-T is usually 5 days.
3.What payment methods are accepted for MAX6314US31D1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6314US31D1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6314US31D1-T?
MAX6314US31D1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6314US31D1-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 MAX6314US31D1-T?
For technical support, including MAX6314US31D1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6314US31D1-T requirements.
6.How does Aetrix verify that MAX6314US31D1-T is sourced from the original manufacturer or authorized distributors?
All MAX6314US31D1-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 MAX6314US31D1-T meets industry standards.
7.What is the process for return or replacement of MAX6314US31D1-T?
All MAX6314US31D1-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6314US31D1-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 MAX6314US31D1-T part is unused and in its original packaging.
Return procedure for MAX6314US31D1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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