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Analog Devices Inc./Maxim Integrated MAX6314US31D4+T
- Part No.:
- MAX6314US31D4+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6314US31D4+T.pdf
- Description:
- IC RESET CIRCUIT 3.08V SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,939
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Product details
Overview
MAX6314US31D4+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, minimum reset timeout period of 1120ms, ±2.5% threshold accuracy over temperature, 5µA supply current, and SOT143 package. It is used in portable/battery-powered equipment requiring reliable power-on and brownout reset.
For engineers reviewing the MAX6314US31D4+T datasheet, MAX6314US31D4+T pinout, MAX6314US31D4+T application, or MAX6314US31D4+T equivalent, key selection criteria include bidirectional RESET compatibility, 3.08V threshold tolerance, 1120ms minimum timeout, immunity to short VCC transients, and absence of external components for manual reset debounce.
Technical Context
The MAX6314US31D4+T implements a precision voltage-monitoring comparator with laser-trimmed internal resistors to set its 3.08V reset threshold, and an internal timer that guarantees RESET remains asserted for ≥1120ms after VCC rises above threshold or MR deasserts. Its bidirectional RESET output combines a 4.7kΩ pull-up resistor with a P-channel active pullup transistor to meet timing requirements of fast µPs with bidirectional reset pins.
It includes a debounced manual reset input (MR) with internal 63kΩ pullup, supports operation from 1.0V to 5.5V VCC, and maintains RESET sink capability down to VCC = 1V. The device is immune to VCC transients ≤100µs at 100mV overdrive and exhibits 60ppm/°C reset threshold tempco.
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 | ≥1120ms minimum; guarantees sufficient hold time for full µP initialization after power recovery |
| Supply Current | 5µA typical at +25°C; enables ultra-low-power operation in battery-backed systems |
| Threshold Accuracy | ±2.5% over -40°C to +85°C; minimizes false resets across industrial temperature range |
| MR Input Threshold | 0.3 × VCC max; ensures robust low-level detection even at low VCC voltages |
| RESET Output Structure | Bidirectional with 4.7kΩ passive pullup + P-channel active pullup; eliminates need for external pullup and meets 68HC11 timing |
| VCC Operating Range | 1.0V to 5.5V; supports wide-input systems including single-cell Li-ion and 3.3V/5V logic domains |
Pinout & Package
SOT143 package: 4-pin, surface-mount, lead-free compatible (indicated by "+T" suffix), -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; internal voltage divider derives 3.08V threshold reference |
| MR | Manual reset input | Active-low; asserts reset when pulled low; internally pulled up to VCC via 63kΩ resistor |
| RESET | Bidirectional reset output | Combines N-channel pulldown + P-channel active pullup + 4.7kΩ resistor; interfaces directly with 68HC11-style bidirectional reset pins |
| GND | Ground reference | Return path for all internal circuitry and RESET output current |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional RESET interface | Enables direct connection to µPs like 68HC11 without external level-shifting or pullup components |
| Factory-trimmed 3.08V threshold | Eliminates need for external resistor networks or calibration; achieves ±2.5% accuracy over full temperature range |
| 1120ms minimum reset timeout | Guarantees µP reset hold time exceeds boot-time requirements of complex embedded firmware |
| 5µA quiescent current | Extends battery life in portable instruments and remote sensors where standby power is critical |
| Integrated MR debounce | Internal 63kΩ pullup and noise-immune input design removes need for external RC filter or Schmitt trigger |
Applications
| Portable Medical Monitor | Industrial PLC Controller |
|---|---|
Use Scenario: Battery-powered handheld ECG device with ARM Cortex-M4 MCU requiring guaranteed reset during Li-ion discharge from 4.2V to 2.8V. IC Role / Device Role / Timing Role: Supervisory circuit monitoring VCC and asserting bidirectional RESET to initialize MCU on power-up and brownout. Use Value: 3.08V threshold aligns with safe brownout margin below 3.3V MCU VDD; 1120ms timeout ensures full bootloader execution before peripheral initialization. |
Use Scenario: DIN-rail mounted programmable logic controller with multiple I/O modules sharing a common reset bus. IC Role / Device Role / Timing Role: Central reset supervisor providing synchronized, glitch-immune reset to main CPU and co-processors. Use Value: Bidirectional RESET with active pullup ensures <500ns rise time despite 200pF bus capacitance, preventing misinterpretation of self-reset events. |
| Smart Energy Meter | Automotive Body Control Module |
Use Scenario: ANSI C12.20-compliant electricity meter powered from split-phase AC via isolated DC-DC converter with variable 3.0–3.6V output. IC Role / Device Role / Timing Role: Precision VCC monitor ensuring deterministic reset during line sags or transformer inrush-induced dips. Use Value: ±2.5% threshold accuracy over temperature prevents spurious resets in unventilated enclosures; 100µs transient immunity rejects switching noise from SMPS. |
Use Scenario: 12V automotive system with LDO-regulated 3.3V domain powering CAN microcontroller; subject to load-dump and cold-crank transients. IC Role / Device Role / Timing Role: Primary reset supervisor coordinating safe shutdown and restart during battery voltage excursions. Use Value: Operates down to 1.0V VCC, enabling valid RESET assertion through cold-crank (as low as 2.5V battery); MR input allows service-mode forced reset via dashboard switch. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US31D4+T | Open-drain RESET output (no internal pullup or active pullup); requires external pullup resistor | Not suitable for bidirectional reset interfaces like 68HC11; only appropriate for standard active-low reset inputs | Select only if target µP has dedicated active-low reset pin and board layout already includes pullup |
| TPS3808G33DBVR | Fixed 3.3V threshold (not 3.08V); 200ms default timeout (adjustable via capacitor); no MR input | Lacks manual reset functionality and precise 3.08V threshold needed for tight brownout margins | Use only in 3.3V systems where 3.08V specificity and MR are not required; verify timeout sufficiency for firmware boot |
Compared with MAX6314US31D4+T, MAX6315US31D4+T omits bidirectional capability and requires external components, while TPS3808G33DBVR lacks MR support and offers less precise threshold alignment for sub-3.3V brownout detection-making MAX6314US31D4+T uniquely suited for 68HC11-compatible, manually resettable, low-threshold monitoring.
Availability
MAX6314US31D4+T is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC controllers, smart energy meters, and automotive body control modules requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6314US31D4+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 high-performance analog and mixed-signal ICs for industrial, computing, communications, and consumer applications.
The MAX6314 series was developed specifically for microprocessor supervision in resource-constrained systems requiring bidirectional reset compatibility, minimal external components, and precise voltage thresholding-targeting portable, industrial, and automotive embedded control.
FAQ
What is the exact reset threshold voltage for MAX6314US31D4+T?
The MAX6314US31D4+T has a factory-trimmed nominal reset threshold voltage of 3.08V, with ±2.5% accuracy 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; it is not adjustable or user-configurable.
Does MAX6314US31D4+T support bidirectional reset communication with the Motorola 68HC11?
Yes, MAX6314US31D4+T is explicitly designed for bidirectional reset compatibility with the Motorola 68HC11 and other µPs featuring bidirectional reset I/O pins. Its RESET output integrates a 4.7kΩ pull-up resistor and P-channel active pullup transistor to meet the timing and drive requirements of such interfaces without external components.
What is the minimum reset timeout period for MAX6314US31D4+T?
The MAX6314US31D4+T provides a minimum reset timeout period of 1120ms. This is the guaranteed duration for which the RESET output remains asserted after VCC rises above the 3.08V threshold or after the manual reset (MR) input is deasserted, ensuring sufficient time for complete microprocessor initialization.
Can MAX6314US31D4+T operate with VCC below 3.0V?
Yes, MAX6314US31D4+T operates over a VCC range of 1.0V to 5.5V. While its 3.08V reset threshold means it will assert RESET when VCC falls below that level, the device continues functional operation-including MR input detection and RESET output control-down to 1.0V, and maintains RESET sink capability until VCC drops below 1.0V.
Is an external pull-up resistor required for the RESET pin of MAX6314US31D4+T?
No, an external pull-up resistor is not required for the RESET pin of MAX6314US31D4+T. The device integrates both a 4.7kΩ passive pull-up resistor and a P-channel active pullup transistor, enabling direct interface with bidirectional reset pins and eliminating the need for external components in standard configurations.
MAX6314US31D4+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:
- Active
- 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:
- 1.12s Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6314US31D4+T FAQ
1.How can I place an order for MAX6314US31D4+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6314US31D4+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 MAX6314US31D4+T reliable?
The price and inventory of MAX6314US31D4+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6314US31D4+T is usually 5 days.
3.What payment methods are accepted for MAX6314US31D4+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6314US31D4+T transactions.
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4.How is shipping managed for MAX6314US31D4+T?
MAX6314US31D4+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6314US31D4+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 MAX6314US31D4+T?
For technical support, including MAX6314US31D4+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6314US31D4+T requirements.
6.How does Aetrix verify that MAX6314US31D4+T is sourced from the original manufacturer or authorized distributors?
All MAX6314US31D4+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 MAX6314US31D4+T meets industry standards.
7.What is the process for return or replacement of MAX6314US31D4+T?
All MAX6314US31D4+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6314US31D4+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 MAX6314US31D4+T part is unused and in its original packaging.
Return procedure for MAX6314US31D4+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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