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Analog Devices Inc./Maxim Integrated MAX6314US44D3-T
- Part No.:
- MAX6314US44D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6314US44D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,777
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Product details
Overview
MAX6314US44D3-T from Maxim Integrated is a low-power CMOS microprocessor supervisory circuit that monitors VCC supply voltage and asserts a bidirectional RESET signal when voltage falls below 4.39V or upon manual reset assertion. It features factory-trimmed 4.39V threshold, 140ms minimum reset timeout period, ±1.8% threshold accuracy at +25°C, and operates from -40°C to +85°C in SOT143 package. Used for reliable power-up/power-down sequencing in embedded controllers.
For engineers reviewing the MAX6314US44D3-T datasheet, MAX6314US44D3-T pinout, MAX6314US44D3-T application, or MAX6314US44D3-T equivalent, key selection criteria include bidirectional reset compatibility with 68HC11-style µPs, 4.39V precision threshold, 140ms timeout, 5µA quiescent current, and immunity to short VCC transients.
Technical Context
The MAX6314US44D3-T implements a precision voltage monitor with laser-trimmed internal resistor divider setting nominal VTH = 4.39V, ±1.8% accuracy at +25°C and ±2.5% over temperature. Its reset generator uses an internal timer with fixed 140ms (min) timeout after VCC recovery or MR deassertion.
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 63kΩ internal pullup and supports debounced manual reset with no external circuitry required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTH Nominal | 4.39V - factory-trimmed threshold for VCC brownout detection |
| tRP Min | 140ms - guaranteed minimum reset assertion time after VCC recovery or MR release |
| ICC | 5µA - ultra-low supply current enables battery-powered system use |
| VTH Accuracy | ±1.8% at +25°C - ensures precise power-fail detection without calibration |
| Temp Range | -40°C to +85°C - industrial-grade operation for embedded control environments |
| MR Input | 63kΩ internal pullup - eliminates need for external pullup on manual reset line |
| RESET Output | Bidirectional with 4.7kΩ + p-channel pullup - directly interfaces 68HC11 and similar µPs |
Pinout & Package
SOT143 (4-pin, surface-mount) package with 1.3mm × 2.9mm footprint, -40°C to +85°C operating range, and lead-free option available (+T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply voltage input | Monitored power rail; device operates from 2.5V–5.5V and asserts reset if voltage drops below 4.39V |
| MR | Manual reset input | Active-low input with 63kΩ internal pullup; asserts reset when pulled low and holds reset for full 140ms timeout after release |
| RESET | Bidirectional reset I/O | Combines n-channel sink, p-channel active pullup, and 4.7kΩ resistor to drive/monitor bidirectional µP reset lines without external components |
| 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 68HC11 and other µPs with bidirectional reset I/O, eliminating level-shifting or external logic |
| Factory-trimmed 4.39V threshold | Eliminates external resistor network and calibration; supports precise 4.39V supply monitoring for 5V systems with margin |
| 140ms reset timeout | Guarantees sufficient hold time for µP initialization and peripheral stabilization after power recovery |
| 5µA supply current | Extends battery life in portable equipment; enables always-on supervision without significant drain |
| Immunity to short VCC transients | Rejects <10µs glitches down to ~100mV below VTH, preventing spurious resets in noisy power environments |
Applications
| Computers | Controllers |
|---|---|
Use Scenario: Desktop and embedded PC motherboard power sequencing during AC power loss or cold boot. IC Role / Device Role / Timing Role: Supervisory IC asserting RESET until VCC stabilizes above 4.39V and holds for ≥140ms. Use Value: Prevents CPU execution errors during unstable power conditions using factory-calibrated threshold and deterministic timeout. | Use Scenario: Industrial PLC main controller board requiring reliable restart after brownout events. IC Role / Device Role / Timing Role: Voltage monitor and reset generator interfacing bidirectional reset pin of ARM Cortex-M4 MCU. Use Value: Eliminates external pullup and debounce components while ensuring µP recognizes external vs. internal reset sources. |
| Intelligent Instruments | Portable/Battery-Powered Equipment |
Use Scenario: Handheld multimeter with lithium coin-cell backup maintaining real-time clock and calibration data. IC Role / Device Role / Timing Role: Low-current supervisor detecting main supply dropout and triggering controlled shutdown sequence. Use Value: 5µA ICC enables multi-year battery life; 4.39V threshold aligns with regulated 4.5V analog front-end supply. | Use Scenario: Wireless sensor node powered by two AA alkaline cells (3.0V–3.2V fresh, dropping to 2.4V under load). IC Role / Device Role / Timing Role: Reset circuit monitoring regulated 3.3V rail derived from boost converter, asserting reset at 4.39V - indicating upstream regulator failure. Use Value: Early fault detection before system-level undervoltage lockout, enabling graceful data save and sleep entry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US44D3-T | Open-drain RESET output instead of bidirectional; identical VTH (4.39V) and tRP (140ms) | Requires external pullup resistor; not compatible with 68HC11-style bidirectional reset I/O | Select when µP reset pin is unidirectional open-drain and board layout allows external 4.7kΩ pullup |
| TPS3808G33DBVR | Fixed 3.3V threshold, 200ms timeout, 1.6µA ICC; SOT-23-5 package | Lower threshold and longer timeout; lacks bidirectional RESET capability and MR glitch rejection | Choose for ultra-low-power 3.3V systems where bidirectional interface is unnecessary and longer reset hold time is acceptable |
Compared with MAX6314US44D3-T, MAX6315US44D3-T requires external pullup and cannot support bidirectional reset arbitration, while TPS3808G33DBVR offers lower current but mismatches the 4.39V threshold and removes MR debouncing - making MAX6314US44D3-T uniquely suited for 5V-system brownout detection with 68HC11-compatible reset signaling.
Availability
MAX6314US44D3-T is available at Aetrix Electronics and suitable for computers, controllers, intelligent instruments, and portable/battery-powered equipment requiring stable component supply, long-term manufacturability, and industrial temperature support.
Supply support for MAX6314US44D3-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 industrial, computing, and communications applications.
The MAX6314 family delivers low-power, factory-trimmed µP supervisors optimized for reliable power monitoring in space-constrained embedded systems with bidirectional reset requirements.
FAQ
What is the exact reset threshold voltage for MAX6314US44D3-T?
The MAX6314US44D3-T has a factory-trimmed nominal reset threshold voltage of 4.39V, 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 is specific to the US44 variant in the MAX6314 family.
Does MAX6314US44D3-T support bidirectional reset communication with microcontrollers?
Yes, MAX6314US44D3-T supports bidirectional reset communication via its unique RESET output architecture - combining an n-channel pulldown, p-channel active pullup, and 4.7kΩ passive pullup. This design enables direct interface with µPs like the 68HC11 that use the same pin for both asserting and sensing reset, without requiring external components.
What is the minimum reset timeout period specified for MAX6314US44D3-T?
The minimum reset timeout period for MAX6314US44D3-T is 140ms, as indicated by the "D3" suffix in the part number. This interval is guaranteed after VCC rises above 4.39V or after the manual reset (MR) input is released, ensuring sufficient time for microprocessor and peripheral initialization.
Can MAX6314US44D3-T operate from a 3.3V supply rail?
No, MAX6314US44D3-T cannot reliably supervise a 3.3V rail because its 4.39V reset threshold exceeds typical 3.3V system voltages. It is designed for 5V or higher-supply systems where 4.39V serves as a robust brownout detection point - for 3.3V supervision, consider MAX6314 variants like US33D3-T (3.30V threshold) or alternative supervisors with lower VTH.
Is external debounce circuitry required for the manual reset input on MAX6314US44D3-T?
No, external debounce circuitry is not required for the MR input of MAX6314US44D3-T. The device includes an internal 63kΩ pullup resistor and inherent noise immunity; a simple normally-open momentary switch from MR to GND suffices. In high-noise environments, a 0.1µF capacitor from MR to GND adds further filtering without external RC networks.
MAX6314US44D3-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:
- 4.39V
- Output:
- Bidirectional
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6314US44D3-T FAQ
1.How can I place an order for MAX6314US44D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6314US44D3-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 MAX6314US44D3-T reliable?
The price and inventory of MAX6314US44D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6314US44D3-T is usually 5 days.
3.What payment methods are accepted for MAX6314US44D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6314US44D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6314US44D3-T?
MAX6314US44D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6314US44D3-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 MAX6314US44D3-T?
For technical support, including MAX6314US44D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6314US44D3-T requirements.
6.How does Aetrix verify that MAX6314US44D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6314US44D3-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 MAX6314US44D3-T meets industry standards.
7.What is the process for return or replacement of MAX6314US44D3-T?
All MAX6314US44D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6314US44D3-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 MAX6314US44D3-T part is unused and in its original packaging.
Return procedure for MAX6314US44D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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