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Analog Devices Inc./Maxim Integrated MAX6314US46D2-T
- Part No.:
- MAX6314US46D2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6314US46D2-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,669
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Product details
Overview
MAX6314US46D2-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 4.63V reset threshold, 20ms minimum reset timeout period, ±1.8% threshold accuracy at +25°C, and operates from 2.5V to 5.5V. Used in portable equipment and critical µP power monitoring.
For engineers reviewing the MAX6314US46D2-T datasheet, MAX6314US46D2-T pinout, MAX6314US46D2-T application, or MAX6314US46D2-T equivalent, key selection factors include bidirectional RESET interface capability, 4.63V precision threshold, 20ms timeout, SOT143 package footprint, and immunity to short VCC transients.
Technical Context
The MAX6314US46D2-T implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider to set its 4.63V reset threshold, with ±2.5% accuracy over –40°C to +85°C. Its reset generator includes an internally programmed 20ms (minimum) timeout timer that restarts on every VCC dip below threshold or MR assertion.
The RESET output combines a 4.7kΩ pull-up resistor and a p-channel active pull-up transistor, enabling fast low-to-high transitions (<35µs typical rise time) even under high capacitive load - essential for reliable interfacing with bidirectional-reset µPs like the 68HC11 in multi-device systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTH Threshold | 4.63V nominal; factory-trimmed for precise brownout detection at this level |
| tRP Timeout | 20ms minimum; ensures µP remains held in reset long enough for stable power recovery |
| Accuracy | ±1.8% at +25°C; guarantees tight voltage margin control during power sequencing |
| ICC | 5µA typical; enables ultra-low-power operation in battery-powered systems |
| VCC Range | 2.5V to 5.5V; supports wide-range logic supplies including 3.3V and 5V systems |
| MR Input | Internal 63kΩ pull-up; allows direct connection of momentary switch to GND without external components |
| RESET Output | Bidirectional with 4.7kΩ + p-channel pull-up; eliminates need for external pull-up and solves timing issues on shared reset buses |
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 and threshold reference input | Monitored voltage source; powers internal circuitry and sets reset trigger point via trimmed divider |
| MR | Manual reset input | Active-low input with internal 63kΩ pull-up; asserts reset when pulled low, debounced internally |
| RESET | Bidirectional reset output | Open-drain-like output with integrated 4.7kΩ resistor and p-channel active pull-up for µP compatibility |
| GND | Ground reference | Return path for all internal current sinks and comparator references |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional RESET interface | Enables direct connection to 68HC11-style µPs without external logic or level-shifting |
| Factory-trimmed 4.63V threshold | Eliminates external resistor network and calibration; reduces BOM count and layout area |
| 20ms minimum reset timeout | Guarantees sufficient hold time for full µP initialization after power stabilization |
| 5µA supply current | Extends battery life in portable instrumentation and handheld controllers |
| Immunity to short VCC transients | Rejects sub-100ns glitches up to 100mV below threshold, preventing spurious resets |
Applications
| Portable/Battery-Powered Equipment | Critical µP and µC Power Monitoring |
|---|---|
Use Scenario: Handheld test meters and medical monitors requiring long battery life and reliable power-on reset behavior. IC Role / Device Role / Timing Role: Supervisory IC asserting reset during battery voltage sag or cold-start conditions. Use Value: Prevents erratic µP execution during low-VCC by holding reset until stable 4.63V is reached and maintained for ≥20ms. |
Use Scenario: Industrial PLC modules where undetected brownout could cause unsafe state transitions. IC Role / Device Role / Timing Role: Precision voltage monitor with deterministic reset assertion and release timing. Use Value: Ensures µC only exits reset after VCC exceeds 4.63V and remains valid for ≥20ms - eliminating marginal startup failures. |
| Computers | Controllers |
Use Scenario: Embedded PC/104 modules with legacy 68HC11-based control subsystems. IC Role / Device Role / Timing Role: Bidirectional reset coordinator between supervisor and µP on shared reset bus. Use Value: Solves slow RESET rise-time issue caused by distributed capacitance using integrated p-channel pull-up + 4.7kΩ resistor. |
Use Scenario: HVAC controllers operating across wide temperature ranges (-40°C to +85°C). IC Role / Device Role / Timing Role: Temperature-stable reset generator with ±2.5% VTH drift over full range. Use Value: Maintains accurate 4.63V trip point across environmental extremes, avoiding false resets or missed brownouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US46D2-T | Open-drain RESET output (no internal pull-up); same 4.63V threshold and 20ms timeout | Requires external 4.7kΩ pull-up; suitable where bidirectional µP interface is not needed | Select when interfacing with standard open-drain–compatible µPs or when board-level pull-up already exists |
| TPS3808G33DBVR | 3.3V fixed threshold; 20ms timeout; 2.5µA quiescent current; SOT-23-5 package | Not bidirectional; lacks MR input; optimized for 3.3V-only systems | Choose for lower-power 3.3V designs where manual reset and bidirectional interface are unnecessary |
Compared with MAX6314US46D2-T, MAX6315US46D2-T removes the active pull-up but retains identical monitoring specs - ideal for simplified open-drain use cases - while TPS3808G33DBVR offers lower current and smaller footprint but sacrifices MR input and bidirectional capability, limiting µP compatibility.
Availability
MAX6314US46D2-T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, critical µP and µC power monitoring, and industrial controllers requiring stable component supply and long-term lifecycle support.
Supply support for MAX6314US46D2-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, with emphasis on reliability and integration.
The MAX6314 family delivers highly accurate, low-power µP supervisory functions targeting systems needing deterministic reset behavior, minimal external components, and robust noise immunity - especially in portable and industrial environments.
FAQ
What is the exact reset threshold voltage for MAX6314US46D2-T?
The MAX6314US46D2-T has a factory-trimmed nominal reset threshold of 4.63V, with ±1.8% accuracy at +25°C and ±2.5% over the full –40°C to +85°C temperature range. This value is laser-trimmed during manufacturing and specified in the Ordering Information table; it is not adjustable or user-configurable.
Does MAX6314US46D2-T support bidirectional reset communication with the 68HC11?
Yes, the MAX6314US46D2-T is explicitly designed for bidirectional reset compatibility with the Motorola 68HC11 and similar µPs. Its RESET pin integrates both an n-channel pulldown and a p-channel active pull-up in parallel with a 4.7kΩ resistor, enabling the µP to drive RESET low and the supervisor to drive it low - with fast rise time ensured by the active pull-up.
What is the reset timeout period for MAX6314US46D2-T?
The MAX6314US46D2-T provides a minimum reset timeout period of 20ms. This interval begins after VCC rises above the 4.63V threshold or after the MR input is deasserted, and ensures the reset signal remains asserted long enough for reliable µP initialization before release.
Can MAX6314US46D2-T operate from a 3.3V supply?
Yes, the MAX6314US46D2-T operates across a VCC range of 2.5V to 5.5V, making it fully compatible with 3.3V systems. Its 4.63V reset threshold remains valid and accurate regardless of supply voltage, allowing robust brownout detection even when VCC is nominally 3.3V - though in such cases, reset will trigger only if VCC rises above 4.63V (e.g., during power sequencing with higher-voltage rails).
Is an external pull-up resistor required for the RESET pin of MAX6314US46D2-T?
No external pull-up resistor is required for the RESET pin of MAX6314US46D2-T. The device integrates a 4.7kΩ pull-up resistor and a p-channel active pull-up transistor, which together eliminate the need for external components while ensuring fast, reliable rise times on shared reset buses - a key design feature confirmed in the Typical Operating Circuit and Functional Diagram.
MAX6314US46D2-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:
- 4.63V
- 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
MAX6314US46D2-T FAQ
1.How can I place an order for MAX6314US46D2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6314US46D2-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 MAX6314US46D2-T reliable?
The price and inventory of MAX6314US46D2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6314US46D2-T is usually 5 days.
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MAX6314US46D2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6314US46D2-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 MAX6314US46D2-T?
For technical support, including MAX6314US46D2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6314US46D2-T requirements.
6.How does Aetrix verify that MAX6314US46D2-T is sourced from the original manufacturer or authorized distributors?
All MAX6314US46D2-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 MAX6314US46D2-T meets industry standards.
7.What is the process for return or replacement of MAX6314US46D2-T?
All MAX6314US46D2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6314US46D2-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 MAX6314US46D2-T part is unused and in its original packaging.
Return procedure for MAX6314US46D2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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