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Analog Devices Inc./Maxim Integrated MAX6314US47D2-T
- Part No.:
- MAX6314US47D2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6314US47D2-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:25,000
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Product details
Overview
MAX6314US47D2-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., 68HC11). It features a factory-trimmed 4.70V reset threshold, 20ms 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 reset and brownout protection.
For engineers reviewing the MAX6314US47D2-T datasheet, MAX6314US47D2-T pinout, MAX6314US47D2-T application, or MAX6314US47D2-T equivalent, key selection criteria include bidirectional RESET compatibility, precise 4.70V threshold tolerance, 20ms timeout timing, immunity to short VCC transients, and absence of external pull-up requirements due to integrated 4.7kΩ resistor + active P-channel pullup.
Technical Context
The MAX6314US47D2-T implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider to set its 4.70V nominal reset threshold, achieving ±1.8% accuracy at +25°C and ±2.5% over –40°C to +85°C. Its reset assertion logic is triggered by VCC falling below threshold or MR pin low assertion, with reset held active for a fixed 20ms (min) timeout after recovery.
Its RESET output combines an N-channel pulldown, a 4.7kΩ passive pullup, and a P-channel active pullup enabled for 2µs after RESET rises above 0.5V - enabling fast rise time (<350ns typical into 100pF) even with multiple devices on the reset bus. The MR input includes a 63kΩ internal pullup and supports debounced manual reset without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTH Nominal | 4.70V - factory-trimmed threshold ensures accurate power-fail detection for 5V systems with margin. |
| tRP Min | 20ms - guarantees sufficient reset hold time for full µP initialization and register clearing. |
| Reset Threshold Accuracy | ±1.8% at +25°C - minimizes false resets and ensures consistent trip point across production units. |
| ICC | 5µA - enables ultra-low-power operation in battery-backed or energy-constrained applications. |
| RESET Output Type | Bidirectional with 4.7kΩ pullup + active P-channel - eliminates need for external pullup and supports 68HC11-style reset arbitration. |
| MR Input | Logic-compatible with internal 63kΩ pullup - allows direct connection of momentary switch to GND; no external debounce required. |
| VCC Operating Range | 1.0V to 5.5V - supports valid reset assertion down to 1V, ensuring robust behavior during deep brownout. |
Pinout & Package
SOT143 (4-pin, surface-mount) package with exposed pad option; footprint compatible with JEDEC MO-178AB standard; rated for –40°C to +85°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply voltage input and reset threshold reference | Monitored rail; powers internal circuitry and sets comparator reference via trimmed divider. |
| MR | Manual reset input | Active-low; asserts reset when pulled ≤0.3×VCC; internally pulled up to VCC (63kΩ). |
| RESET | Bidirectional reset output | Open-drain-like with integrated 4.7kΩ pullup + active P-channel; sinks current when low, pulls high via dual-path. |
| GND | Ground reference | Return path for all internal circuits and reset comparator; must be low-impedance for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.70V reset threshold | Eliminates external resistor network and calibration, reducing BOM count and layout area. |
| 20ms minimum reset timeout | Ensures µP completes power stabilization and internal state initialization before release. |
| Integrated 4.7kΩ pullup + active P-channel | Enables sub-500ns RESET rise time into 100pF load - critical for multi-device reset bus timing compliance. |
| 5µA quiescent current | Extends battery life in portable instrumentation and handheld controllers without sacrificing supervision integrity. |
| Immunity to VCC transients ≤100µs | Prevents spurious resets from switching noise or ESD-induced dips, improving system reliability. |
Applications
| Portable Medical Monitors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Battery-powered ECG or glucose meter operating from single Li-ion cell with dynamic load-induced VCC sag. IC Role / Device Role / Timing Role: Supervises VCC during sleep/wake transitions and asserts reset if voltage drops below 4.70V during peak current draw. Use Value: Prevents corrupted memory writes and firmware lockup by guaranteeing clean restart after brownout, using only 5µA standby current. |
Use Scenario: DIN-rail mounted PLC module subjected to 24V DC supply ripple and field wiring transients. IC Role / Device Role / Timing Role: Detects sustained undervoltage on 5V logic rail and holds µC in reset until stable, while rejecting <100µs noise spikes. Use Value: Avoids erratic I/O control outputs during power disturbances, eliminating unsafe actuator behavior without external filtering. |
| Motorola 68HC11-Based Motor Controllers | Handheld Test Equipment |
|
Use Scenario: Brushless motor drive using 68HC11 with bidirectional reset pin for source-differentiated reset handling. IC Role / Device Role / Timing Role: Provides compatible RESET signal that allows µC to distinguish between external (supervisor) and internal (watchdog) reset causes. Use Value: Enables deterministic fault recovery - e.g., jump to watchdog vector with preserved RAM context instead of full cold boot. |
Use Scenario: Portable multimeter with auto-power-down and button-initiated recalibration sequence. IC Role / Device Role / Timing Role: MR pin accepts front-panel reset button; RESET output coordinates µC, display driver, and ADC power sequencing. Use Value: Eliminates need for RC debounce network and external pullup, reducing component count and PCB space in compact enclosure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US47D2-T | Open-drain RESET output (no internal pullup); same 4.70V threshold and 20ms timeout. | Requires external 4.7kΩ pullup; unsuitable for bidirectional reset arbitration with 68HC11. | Select when µP uses open-drain reset input and board-level pullup already exists. |
| TPS3808G33DBVR | Fixed 3.3V threshold; push-pull RESET; 20ms timeout; 1.6µA ICC; SOT-23-5 package. | Not pin-compatible; lacks bidirectional interface support; optimized for lower-voltage systems. | Choose for 3.3V domains where ultra-low current dominates over reset-source discrimination capability. |
Compared with MAX6314US47D2-T, MAX6315US47D2-T removes the active pullup but retains identical monitoring specs - making it viable only where bidirectional reset signaling is unnecessary. TPS3808G33DBVR offers lower current and smaller footprint but cannot replace MAX6314US47D2-T in 5V, 68HC11-based designs due to voltage mismatch and interface incompatibility.
Availability
MAX6314US47D2-T is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC I/O modules, and Motorola 68HC11-based motor controllers requiring stable component supply, long-term lifecycle assurance, and lead-free compliance.
Supply support for MAX6314US47D2-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 high-reliability, low-power solutions for industrial and embedded markets.
The MAX6314 family delivers cost-effective, pin-efficient µP supervision with factory-trimmed thresholds and bidirectional reset support - specifically engineered for legacy and resource-constrained microcontroller systems requiring deterministic reset behavior.
FAQ
What is the exact reset threshold voltage of the MAX6314US47D2-T?
The MAX6314US47D2-T has a factory-trimmed nominal reset threshold voltage of 4.70V, 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 production and specified in the Ordering Information table under "NOMINAL VTH (V)".
Does the MAX6314US47D2-T require an external pull-up resistor on the RESET pin?
No, the MAX6314US47D2-T does not require an external pull-up resistor. It integrates a 4.7kΩ passive pull-up resistor in parallel with an active P-channel transistor, enabling fast rise times and direct compatibility with bidirectional reset inputs like those on the 68HC11. External pull-ups are redundant and discouraged.
What is the reset timeout period for the MAX6314US47D2-T?
The MAX6314US47D2-T provides a minimum reset timeout period of 20ms. This interval begins after VCC rises above the 4.70V threshold or after the MR pin is released, ensuring sufficient hold time for microprocessor initialization before releasing the reset signal.
Can the MAX6314US47D2-T interface with microcontrollers other than the 68HC11?
Yes, the MAX6314US47D2-T can interface with any microcontroller featuring a bidirectional reset input that accepts an open-drain–compatible signal with internal or external pull-up. Its RESET output architecture is explicitly designed for such interfaces, including derivatives of the 68HC11 and other µCs supporting reset-source arbitration.
Is the MAX6314US47D2-T available in lead-free packaging?
Yes, the MAX6314US47D2-T is available in lead-free packaging. To order the lead-free version, replace the "-T" suffix with "+T" per Maxim's ordering convention (e.g., MAX6314US47D2+T). Both versions use the same SOT143 package and operate across –40°C to +85°C.
MAX6314US47D2-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.7V
- 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
MAX6314US47D2-T FAQ
1.How can I place an order for MAX6314US47D2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6314US47D2-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 MAX6314US47D2-T reliable?
The price and inventory of MAX6314US47D2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6314US47D2-T is usually 5 days.
3.What payment methods are accepted for MAX6314US47D2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6314US47D2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6314US47D2-T?
MAX6314US47D2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6314US47D2-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 MAX6314US47D2-T?
For technical support, including MAX6314US47D2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6314US47D2-T requirements.
6.How does Aetrix verify that MAX6314US47D2-T is sourced from the original manufacturer or authorized distributors?
All MAX6314US47D2-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 MAX6314US47D2-T meets industry standards.
7.What is the process for return or replacement of MAX6314US47D2-T?
All MAX6314US47D2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6314US47D2-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 MAX6314US47D2-T part is unused and in its original packaging.
Return procedure for MAX6314US47D2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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