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Analog Devices Inc./Maxim Integrated MAX6314US44D2-T
- Part No.:
- MAX6314US44D2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6314US44D2-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,939
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Product details
Overview
MAX6314US44D2-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 a factory-trimmed 4.39V reset threshold, 20ms minimum reset timeout period, ±1.8% threshold accuracy at +25°C, and operates from -40°C to +85°C in SOT143 package. It is used in critical µP power monitoring for portable equipment and industrial controllers.
For engineers reviewing the MAX6314US44D2-T datasheet, MAX6314US44D2-T pinout, MAX6314US44D2-T application, or MAX6314US44D2-T equivalent, key selection criteria include bidirectional reset compatibility with 68HC11-style µPs, 4.39V threshold tolerance, 20ms timeout timing, SOT143 footprint constraints, and 5µA quiescent current for battery-sensitive designs.
Technical Context
The MAX6314US44D2-T implements a precision voltage monitor with laser-trimmed internal resistive divider setting nominal VTH = 4.39V, validated across -40°C to +85°C with ±2.5% total accuracy. Its reset generator uses an internal timer with fixed 20ms minimum timeout, independent of external components.
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 resistors. MR input includes a 63kΩ internal pullup and supports debounced manual reset via momentary switch to GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTH Nominal | 4.39V - Factory-trimmed reset threshold ensures reliable brownout detection at precisely defined supply level. |
| tRP Min | 20ms - Internally programmed minimum reset pulse width guarantees sufficient hold time for µP initialization. |
| VTH Accuracy | ±1.8% at +25°C - Tight initial tolerance reduces need for system-level calibration or margining. |
| ICC | 5µA - Ultra-low quiescent current extends battery life in portable and always-on monitoring applications. |
| Package | SOT143 - 4-pin surface-mount package with 1.3mm × 2.9mm footprint enables compact PCB layout. |
| Operating Temp | -40°C to +85°C - Industrial-grade temperature range supports deployment in embedded controllers and instrumentation. |
| MR Input | 63kΩ internal pullup - Eliminates external resistor for manual reset; supports direct switch-to-GND connection. |
Pinout & Package
SOT143 package: 4-pin, single-row, gull-wing lead frame; 1.3mm × 2.9mm body size; 0.95mm pitch; RoHS-compliant lead-free option available (replace "-T" with "+T").
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply & Threshold Monitor Input | Primary power rail input; internally monitored for reset assertion when falling below 4.39V. |
| MR | Manual Reset Input | Active-low input; logic low asserts reset; internal 63kΩ pullup allows direct switch connection to GND. |
| RESET | Bidirectional Reset Output | Open-drain–compatible output with integrated 4.7kΩ pullup + p-channel active pullup for fast rise time on shared reset bus. |
| GND | Ground Reference | Return path for VCC, MR, and RESET; required for accurate threshold sensing and output logic levels. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional RESET I/O Support | Enables direct interfacing with 68HC11 and similar µPs having bidirectional reset pins-no external pullup needed. |
| Factory-Trimmed 4.39V Threshold | Eliminates external resistor network; achieves ±1.8% accuracy at +25°C and ±2.5% over full temperature range. |
| 20ms Minimum Reset Timeout | Guarantees µP reset hold time meets boot initialization requirements without external timing components. |
| 5µA Supply Current | Reduces standby power draw in battery-powered systems such as handheld instruments and remote sensors. |
| Immunity to Short VCC Transients | Rejects glitches ≤100ns at 100mV overdrive-prevents spurious resets during switching noise or ESD events. |
Applications
| Portable Medical Monitors | Industrial PLC Controllers |
|---|---|
Use Scenario: Battery-powered ECG or glucose meter requiring reliable power-on reset and brownout recovery during intermittent charging cycles. IC Role / Device Role / Timing Role: Supervisory IC asserting RESET until VCC stabilizes above 4.39V and holds for ≥20ms, ensuring deterministic µC boot sequence. Use Value: 5µA quiescent current extends battery runtime; 4.39V threshold aligns with Li-ion discharge curve; SOT143 footprint saves board space. | Use Scenario: DIN-rail mounted programmable logic controller operating in harsh factory environments with fluctuating 24VDC supplies. IC Role / Device Role / Timing Role: Voltage supervisor detecting undervoltage on 5V logic rail derived from 24VDC converter; provides clean reset pulse to ARM-based µP. Use Value: ±2.5% VTH accuracy over -40°C to +85°C ensures consistent trip point across ambient extremes; MR pin enables front-panel reset button. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: Low-voltage subsystem (e.g., door module) powered from vehicle battery with transient-rich 12V supply. IC Role / Device Role / Timing Role: Resets microcontroller during cold-crank voltage sag (<4.39V); suppresses false triggers using glitch rejection circuitry. Use Value: Immunity to sub-100ns transients prevents nuisance resets; SOT143 package withstands reflow and vibration; -40°C rating matches under-hood specs. | Use Scenario: Revenue-grade electricity meter with isolated µP and real-time clock, requiring fail-safe reset during AC line dropout. IC Role / Device Role / Timing Role: Monitors backup-supply rail (e.g., supercapacitor-derived 5V) and asserts RESET if voltage decays below 4.39V during mains failure. Use Value: 20ms timeout ensures RTC and metering registers retain state long enough for graceful shutdown; 4.7kΩ internal pullup simplifies BOM. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US44D2-T | Open-drain RESET output (no internal pullup); identical VTH = 4.39V and tRP = 20ms. | Requires external 4.7kΩ pullup resistor; suitable only where bidirectional reset is not needed. | Select MAX6315US44D2-T only if target µP has dedicated open-drain reset input and board layout allows adding pullup. |
| TPS3808G33DBVR | Fixed 3.3V reset threshold; adjustable timeout (20ms/300ms); 1.6µA ICC; SOT-23-5 package. | Not pin-compatible; lower supply current but incompatible VTH for 5V systems; requires different PCB footprint. | Choose TPS3808G33DBVR only for 3.3V systems needing ultra-low power; not a functional substitute for MAX6314US44D2-T's 4.39V/20ms/SOT143 combination. |
Compared with MAX6314US44D2-T, MAX6315US44D2-T lacks bidirectional reset capability and requires external pullup, while TPS3808G33DBVR offers lower current but mismatched 3.3V threshold and non-interchangeable packaging-neither serves as drop-in replacement for 4.39V, 20ms, SOT143-constrained designs.
Availability
MAX6314US44D2-T is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC controllers, and automotive body control modules requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.
Supply support for MAX6314US44D2-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, communications, and consumer applications, with emphasis on reliability and integration.
The MAX6314 family delivers cost-effective, single-chip µP supervision for systems requiring factory-set thresholds, minimal external components, and robust reset signaling-targeting embedded controllers and battery-powered instrumentation.
FAQ
What is the exact reset threshold voltage for MAX6314US44D2-T?
The MAX6314US44D2-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 confirmed in the device's ordering information table and electrical characteristics section.
Does MAX6314US44D2-T require an external pullup resistor on the RESET pin?
No, MAX6314US44D2-T does not require an external pullup resistor. It integrates a 4.7kΩ passive pullup in parallel with a p-channel active pullup transistor on the RESET pin, enabling direct connection to bidirectional µP reset inputs like those on the 68HC11 without additional components.
What is the minimum reset timeout period specified for MAX6314US44D2-T?
The minimum reset timeout period for MAX6314US44D2-T is 20ms. This internally programmed duration ensures the RESET signal remains asserted long enough for reliable microprocessor initialization after VCC rises above 4.39V or after manual reset deassertion.
Can MAX6314US44D2-T operate with supply voltages below 4.39V?
Yes, MAX6314US44D2-T operates from VCC = 2.5V to 5.5V. It continues to function and assert RESET down to VCC = 1.0V (per Electrical Characteristics), though RESET becomes high-impedance below 1V. The 4.39V threshold applies only to reset assertion during VCC fall; operation is valid across the full 2.5V–5.5V range.
Is MAX6314US44D2-T pin-compatible with MAX811?
Yes, MAX6314US44D2-T is explicitly stated as pin-compatible with MAX811 in its datasheet Features section. Both devices use the SOT143 package and share identical pin assignments (VCC, MR, RESET, GND), enabling direct substitution where 4.39V threshold and 20ms timeout meet design requirements.
MAX6314US44D2-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:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6314US44D2-T FAQ
1.How can I place an order for MAX6314US44D2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6314US44D2-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 MAX6314US44D2-T reliable?
The price and inventory of MAX6314US44D2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6314US44D2-T is usually 5 days.
3.What payment methods are accepted for MAX6314US44D2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6314US44D2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6314US44D2-T?
MAX6314US44D2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6314US44D2-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 MAX6314US44D2-T?
For technical support, including MAX6314US44D2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6314US44D2-T requirements.
6.How does Aetrix verify that MAX6314US44D2-T is sourced from the original manufacturer or authorized distributors?
All MAX6314US44D2-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 MAX6314US44D2-T meets industry standards.
7.What is the process for return or replacement of MAX6314US44D2-T?
All MAX6314US44D2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6314US44D2-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 MAX6314US44D2-T part is unused and in its original packaging.
Return procedure for MAX6314US44D2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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