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Analog Devices Inc./Maxim Integrated MAX6314US31D2-T
- Part No.:
- MAX6314US31D2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6314US31D2-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,620
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Product details
Overview
MAX6314US31D2-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 bidirectional reset I/Os (e.g., Motorola 68HC11). It features a factory-trimmed reset threshold of 3.08V, a minimum reset timeout period of 20ms, ±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 reset and brownout protection.
For engineers reviewing the MAX6314US31D2-T datasheet, MAX6314US31D2-T pinout, MAX6314US31D2-T application, or MAX6314US31D2-T equivalent, key selection criteria include reset threshold tolerance over temperature, bidirectional reset compatibility, manual reset debounce capability, internal pullup configuration, and immunity to short VCC transients.
Technical Context
The MAX6314US31D2-T implements a precision voltage-monitoring comparator with laser-trimmed resistive divider to detect VCC falling below 3.08V, triggering a reset assertion that persists for ≥20ms after VCC recovers. Its RESET output integrates a 4.7kΩ passive pullup in parallel with a P-channel active pullup transistor and N-channel pulldown, enabling direct interface with bidirectional reset pins without external components.
It includes a debounced manual reset input (MR) with internal 63kΩ pullup, glitch rejection of ≤100ns, and immunity to VCC transients down to 1mV/µs slew rate. The device operates across -40°C to +85°C and draws only 5µA typical supply current at +25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V nominal; ensures reliable reset assertion during brownout when VCC drops below this level |
| Reset Timeout Period | ≥20ms minimum; guarantees µP remains held in reset long enough for stable power recovery |
| Threshold Accuracy | ±1.8% at +25°C; minimizes false resets due to voltage-reference drift at room temperature |
| Supply Current | 5µA typical; enables ultra-low-power operation in battery-powered systems |
| MR Glitch Rejection | 100ns; prevents spurious reset from noise on manual reset line |
| VCC Operating Range | 1.0V to 5.5V; supports operation down to near-dead-battery conditions while maintaining RESET validity |
| Reset Output Type | Bidirectional-compatible with active pullup; eliminates need for external pullup resistor and accelerates rise time under capacitive load |
Pinout & Package
SOT143 package: 4-pin surface-mount, lead-free compatible, -40°C to +85°C operating range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply voltage and reset threshold monitor input | Primary power rail monitored for undervoltage; powers internal circuitry and sets reference for reset comparator |
| MR | Manual reset input | Active-low input; asserts reset when pulled low; internally pulled up to VCC via 63kΩ resistor |
| RESET | Bidirectional reset output | Active-low open-drain-like output with integrated 4.7kΩ pullup + P-channel active pullup; interfaces directly with 68HC11-style bidirectional reset pins |
| GND | Ground reference | Return path for all internal circuits and reset output; must be connected to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional RESET output | Integrates 4.7kΩ pullup + P-channel active pullup to meet timing requirements of fast µPs (e.g., 4MHz 68HC11) with multiple devices on shared reset bus |
| Factory-trimmed reset threshold | 3.08V with ±1.8% accuracy at +25°C ensures precise brownout detection without external calibration |
| Debounced manual reset | Internal 63kΩ MR pullup and 100ns glitch rejection eliminate need for external RC debounce network |
| Low quiescent current | 5µA supply current extends battery life in portable instrumentation and handheld controllers |
| VCC transient immunity | Immune to negative-going VCC transients ≤100ns at 3.08V threshold overdrive, reducing false resets in noisy environments |
Applications
| Portable Medical Devices | Industrial PLC Controllers |
|---|---|
Use Scenario: Battery-powered glucose meters and handheld ECG monitors require guaranteed reset during battery insertion, low-voltage cutoff, and ESD-induced supply dips. IC Role / Device Role / Timing Role: MAX6314US31D2-T monitors 3.3V rail and asserts bidirectional reset to ARM Cortex-M0 host MCU during brownout, ensuring deterministic boot state. Use Value: 3.08V threshold aligns with Li-ion discharge curve; 20ms timeout exceeds MCU power-up stabilization time; 5µA current preserves battery runtime. |
Use Scenario: Programmable logic controllers in factory automation must survive AC line sags and relay coil back-EMF coupling onto 5V logic rails. IC Role / Device Role / Timing Role: MAX6314US31D2-T serves as primary VCC supervisor for dual-core microcontroller, asserting reset when 3.3V supply dips below 3.08V during transient events. Use Value: ±2.5% threshold accuracy over -40°C to +85°C ensures consistent trip point across industrial temperature range; MR input allows front-panel reset button integration. |
| Smart Energy Meters | Automotive Body Control Modules |
Use Scenario: Revenue-grade electricity meters operate from wide-input DC-DC converters; supply ripple and cold-cranking events demand robust reset behavior. IC Role / Device Role / Timing Role: MAX6314US31D2-T supervises the 3.3V domain powering metrology SoC and secure element, interfacing bidirectionally to allow SoC-initiated watchdog resets. Use Value: Bidirectional RESET enables SoC to distinguish self-reset (e.g., firmware crash) from external reset (e.g., power fault); 20ms timeout satisfies IEC 62056-21 power-fail hold-up requirements. |
Use Scenario: BCMs in 12V automotive systems experience load-dump and cold-crank transients; reset must remain valid despite VCC dipping to 2.5V. IC Role / Device Role / Timing Role: MAX6314US31D2-T monitors post-regulator 3.3V rail and drives bidirectional reset pin of Infineon AURIX TC3xx, supporting both hardware and software reset sources. Use Value: Valid RESET output down to VCC = 1.0V prevents floating reset state during deep brownout; 100ns MR glitch rejection suppresses noise from high-current solenoid switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US31D2-T | Open-drain RESET output (no internal pullup), identical 3.08V threshold and 20ms timeout | Requires external 4.7kΩ pullup; not suitable for bidirectional reset I/Os like 68HC11 | Select when interfacing with standard open-drain reset inputs and board space permits external resistor |
| TPS3808G31DBVR | 3.08V threshold, 20ms timeout, but push-pull RESET output and higher 12µA ICC | Lacks bidirectional capability; incompatible with µPs requiring active pullup for reset arbitration | Choose for cost-sensitive designs where bidirectional reset is unnecessary and push-pull drive is acceptable |
Compared with MAX6314US31D2-T, MAX6315US31D2-T requires external pullup and cannot support reset-source arbitration, while TPS3808G31DBVR lacks the active pullup needed for fast rise-time compliance on multi-device reset buses - making MAX6314US31D2-T uniquely suited for 68HC11-class bidirectional reset systems.
Availability
MAX6314US31D2-T is available at Aetrix Electronics and suitable for portable medical devices, industrial PLC controllers, smart energy meters, automotive body control modules, and critical µP power monitoring applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6314US31D2-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 MAX6314 family is designed specifically for microprocessor supervisory functions in space-constrained, low-power systems - delivering precision voltage monitoring, bidirectional reset compatibility, and integrated manual reset with no external components required.
FAQ
What is the exact reset threshold voltage of the MAX6314US31D2-T?
The MAX6314US31D2-T has a factory-trimmed nominal reset threshold voltage of 3.08V, with ±1.8% accuracy at +25°C and ±2.5% over the full -40°C to +85°C operating temperature range. This value is laser-trimmed during manufacturing and specified in the Ordering Information table of the datasheet.
Does the MAX6314US31D2-T support bidirectional reset communication with the Motorola 68HC11?
Yes, the MAX6314US31D2-T is explicitly designed for bidirectional reset compatibility with the Motorola 68HC11 and other µPs featuring bidirectional reset I/Os. Its RESET output combines a 4.7kΩ pullup resistor with a P-channel active pullup transistor to meet the timing requirements for reset-source arbitration.
What is the minimum reset timeout period for the MAX6314US31D2-T?
The MAX6314US31D2-T has a minimum reset timeout period of 20ms, as indicated by the "D2" suffix in the part number. This ensures the reset signal remains asserted long enough for stable power recovery and µP initialization after VCC rises above the 3.08V threshold.
Can the MAX6314US31D2-T operate with supply voltages below 3.08V?
Yes, the MAX6314US31D2-T operates from VCC = 1.0V to 5.5V. While it asserts reset when VCC falls below 3.08V, it continues functioning down to 1.0V - and its RESET output remains valid (logic low) across this entire range, ensuring deterministic behavior during deep brownout.
Is an external pullup resistor required for the RESET pin of the MAX6314US31D2-T?
No, an external pullup resistor is not required for the MAX6314US31D2-T. Its RESET output integrates a 4.7kΩ internal pullup resistor plus a P-channel active pullup transistor, enabling direct connection to bidirectional reset pins without additional components.
MAX6314US31D2-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:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6314US31D2-T FAQ
1.How can I place an order for MAX6314US31D2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6314US31D2-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 MAX6314US31D2-T reliable?
The price and inventory of MAX6314US31D2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6314US31D2-T is usually 5 days.
3.What payment methods are accepted for MAX6314US31D2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6314US31D2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6314US31D2-T?
MAX6314US31D2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6314US31D2-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 MAX6314US31D2-T?
For technical support, including MAX6314US31D2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6314US31D2-T requirements.
6.How does Aetrix verify that MAX6314US31D2-T is sourced from the original manufacturer or authorized distributors?
All MAX6314US31D2-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 MAX6314US31D2-T meets industry standards.
7.What is the process for return or replacement of MAX6314US31D2-T?
All MAX6314US31D2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6314US31D2-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 MAX6314US31D2-T part is unused and in its original packaging.
Return procedure for MAX6314US31D2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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