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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:4,711
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Product details
Overview
MAX6314US44D2+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 4.39V 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 and brownout reset control.
For engineers reviewing the MAX6314US44D2+T datasheet, MAX6314US44D2+T pinout, MAX6314US44D2+T application, or MAX6314US44D2+T equivalent, key selection considerations include bidirectional RESET interface capability, factory-set 4.39V threshold with ±2.5% tempco, 20ms timeout, immunity to short VCC transients, and compatibility with manual reset input without external debounce.
Technical Context
The MAX6314US44D2+T implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider to set its 4.39V reset threshold, and integrates a monostable timer to guarantee ≥20ms RESET assertion after VCC recovery or MR deassertion. Its RESET output combines an N-channel pulldown, P-channel active pullup, and 4.7kΩ passive pullup-enabling direct connection to bidirectional µP reset pins without external components.
This architecture supports deterministic reset source identification (e.g., external supervisor vs. internal µP fault) by allowing the µP to sample RESET state after release, while the active pullup ensures sub-500ns rise time even with >390pF bus capacitance-critical for high-speed 68HC11-class processors operating at 4MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.39V nominal, ±1.8% at +25°C - ensures accurate power-fail detection for 4.5V–5V systems |
| Reset Timeout Period | ≥20ms - guarantees sufficient hold time for µP initialization after VCC stabilization |
| Supply Current | 5µA typical at +25°C - enables multi-year battery life in portable monitoring applications |
| MR Input Threshold | VIL = 0.3×VCC, VIH = 0.7×VCC - supports clean logic-level manual reset with internal 63kΩ pullup |
| RESET Output Structure | Bidirectional with 4.7kΩ pullup + P-channel active pullup - eliminates need for external pullup and ensures fast rise under capacitive load |
| Operating Voltage Range | 1.0V to 5.5V - allows operation during deep brownout and compatibility with 3.3V/5V systems |
| Temperature Range | −40°C to +85°C - qualified for industrial and automotive-adjacent embedded environments |
Pinout & Package
SOT143 package: 4-pin, surface-mount, lead-free (RoHS-compliant), 1.3mm × 2.9mm footprint, −40°C to +85°C operating range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply voltage and reset threshold monitor input | Primary power rail input; internally monitored to trigger reset when falling below 4.39V |
| MR | Manual reset input | Active-low input with internal 63kΩ pullup; asserts reset when pulled low, no external debounce required |
| RESET | Active-low bidirectional reset output | Combines N-channel sink, P-channel active pullup, and 4.7kΩ resistor-directly interfaces with 68HC11-style bidirectional reset I/O |
| GND | Ground reference | Return path for all internal circuitry and reset comparator reference |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional RESET interface | Enables µP-level reset source discrimination (supervisor vs. internal fault) without external logic or timing circuits |
| Factory-trimmed 4.39V threshold | Eliminates external resistor network and calibration, reducing BOM count and board space in space-constrained designs |
| 20ms minimum reset timeout | Guarantees µP core and peripherals fully stabilize before release-prevents race conditions in multi-clock-domain systems |
| 5µA quiescent current | Supports always-on supervision in battery-backed systems (e.g., smart meters, IoT sensors) with <1% annual drain |
| Immunity to VCC transients ≤100ns | Prevents false resets from ESD or switching noise, verified per Typical Operating Characteristics Figure MAX6314-07 |
Applications
| Portable Medical Monitors | Industrial PLC Controllers |
|---|---|
|
Use Scenario: Battery-powered ECG or glucose meter that must retain calibration data across intermittent power loss and cold start. IC Role / Device Role / Timing Role: Supervisory IC asserting controlled reset during VCC brownout and enabling safe state retention via bidirectional RESET handshake with ARM Cortex-M0. Use Value: The 4.39V threshold aligns with Li-ion discharge curve; 20ms timeout ensures ADC and memory controllers complete shutdown before reset release. |
Use Scenario: DIN-rail mounted programmable logic controller exposed to 24VDC supply fluctuations in factory automation. IC Role / Device Role / Timing Role: Primary power monitor interfacing with Renesas RX65N µP's bidirectional reset pin to distinguish between power-fail and watchdog-triggered resets. Use Value: Active pullup ensures RESET rises within two E-cycles (<500ns) despite 300pF bus capacitance from multiple I/O modules-enabling correct reset vector selection. |
| Smart Energy Meters | Automotive Body Control Modules |
|
Use Scenario: Revenue-grade electricity meter with tamper-detection circuitry requiring guaranteed reset on AC/DC converter dropout. IC Role / Device Role / Timing Role: Single-function VCC supervisor providing glitch-immune reset assertion during 10ms line sags, with manual reset for field firmware updates. Use Value: ±2.5% threshold accuracy over temperature ensures consistent trip point across −25°C to +70°C enclosure ambient; MR pin accepts direct pushbutton connection. |
Use Scenario: Low-power BCM managing door locks and lighting, powered from vehicle battery with wide voltage range (9V–16V). IC Role / Device Role / Timing Role: Secondary supervisor verifying 3.3V LDO output integrity before enabling CAN transceiver and microcontroller boot sequence. Use Value: 5µA supply current minimizes standby drain; 1.0V–5.5V operating range accommodates cold-crank (6.5V) and load-dump (20V) transients without latch-up. |
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 active pullup), same 4.39V threshold and 20ms timeout | Requires external 4.7kΩ pullup; unsuitable for bidirectional µP reset I/Os like 68HC11 | Select only if target µP uses open-drain reset input and board layout already includes pullup resistor |
| TPS3808G33DBVR | Fixed 3.08V threshold, 20ms timeout, 2.5µA ICC, SOT-23-5 package | Lacks bidirectional RESET structure; MR pin requires external pullup; no active pullup transistor | Choose for lower-quiescent-current 3.3V systems where bidirectional reset detection is unnecessary |
Compared with MAX6314US44D2+T, MAX6315US44D2+T omits the P-channel pullup and relies on external biasing-making it incompatible with bidirectional reset protocols-while TPS3808G33DBVR offers lower current but sacrifices the integrated reset-source discrimination capability essential for 68HC11-class µPs.
Availability
MAX6314US44D2+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 across extended temperature ranges and long production lifecycles.
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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and computing applications.
The MAX6314 series was designed specifically for microprocessor reset supervision in resource-constrained embedded systems-emphasizing ultra-low power, factory-trimmed accuracy, and direct interface capability with legacy and modern bidirectional reset architectures.
FAQ
What is the exact reset threshold voltage for MAX6314US44D2+T?
The MAX6314US44D2+T has a factory-trimmed nominal reset threshold 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 specified in the Ordering Information table under "NOMINAL VTH (V)" for the D2 variant.
Does MAX6314US44D2+T require an external pullup resistor on the RESET pin?
No, MAX6314US44D2+T does not require an external pullup resistor. Its RESET output integrates a 4.7kΩ passive pullup resistor in parallel with a P-channel active pullup transistor-enabling direct connection to bidirectional µP reset pins like those on the 68HC11 without additional components.
What is the minimum reset timeout period for MAX6314US44D2+T?
The MAX6314US44D2+T provides a minimum reset timeout period of 20ms. This is the guaranteed duration RESET remains asserted after VCC rises above 4.39V or after the manual reset (MR) input is deasserted, ensuring reliable µP initialization across process and temperature variations.
Can MAX6314US44D2+T be used with microcontrollers other than the 68HC11?
Yes, MAX6314US44D2+T is compatible with any µP or µC featuring a bidirectional reset I/O pin that accepts active-pullup-driven signals-such as certain Renesas RL78, STMicroelectronics STM32L0, and NXP Kinetis variants-provided the reset sampling protocol matches the 68HC11's two-E-cycle evaluation window and logic-level thresholds.
Is MAX6314US44D2+T RoHS-compliant and lead-free?
Yes, MAX6314US44D2+T is RoHS-compliant and supplied in lead-free packaging. The "+T" suffix explicitly denotes lead-free termination per Maxim's ordering convention; the device meets JEDEC J-STD-020 moisture sensitivity level 1 and is qualified for reflow soldering per IPC/JEDEC J-STD-020.
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:
- Active
- 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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