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Analog Devices Inc./Maxim Integrated MAX6314US43D2+
- Part No.:
- MAX6314US43D2+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6314US43D2+.pdf
- Description:
- IC RESET CIRCUIT 4.30V SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,796
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Product details
Overview
MAX6314US43D2+ 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., Motorola 68HC11). It features a factory-trimmed 4.30V reset threshold, 20ms minimum reset timeout period, ±1.8% threshold accuracy at +25°C, 5µA supply current, and SOT143 package. Used in portable/battery-powered equipment requiring reliable power-on reset and brownout protection.
For engineers reviewing the MAX6314US43D2+ datasheet, MAX6314US43D2+ pinout, MAX6314US43D2+ application, or MAX6314US43D2+ equivalent, key selection considerations include its bidirectional RESET output architecture, 4.7kΩ internal pullup + active P-channel pullup, manual reset input with 63kΩ internal pullup, immunity to short VCC transients, and compatibility with systems requiring precise voltage monitoring and deterministic reset timing.
Technical Context
The MAX6314US43D2+ implements a precision voltage-monitoring comparator with laser-trimmed resistive divider to detect VCC falling below 4.30V ±1.8% (at +25°C), triggering a reset assertion that persists for ≥20ms after VCC recovers. Its RESET output combines an N-channel pulldown, 4.7kΩ passive pullup, and P-channel active pullup enabled for 2µs upon rising-edge detection - enabling fast rise time even under high capacitive load (e.g., multi-device reset bus).
It integrates a debounced manual reset input (MR) with internal 63kΩ pullup, supporting direct switch-to-GND connection without external components. The device operates across -40°C to +85°C, draws only 5µA typical supply current, and remains functional down to VCC = 1.0V, ensuring robust reset behavior during power ramp-up/down and brownout events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.30V ±1.8% at +25°C; ensures reliable detection of VCC dip below nominal operating voltage for 3.3V/5V systems. |
| Reset Timeout Period | ≥20ms minimum; guarantees µP remains held in reset long enough for stable power rail recovery and clock stabilization. |
| Supply Current | 5µA typical at +25°C; enables use in battery-critical applications with minimal quiescent drain. |
| MR Input Pullup | 63kΩ internal resistor; allows direct connection of momentary switch to GND without external components. |
| RESET Output Structure | N-channel pulldown + 4.7kΩ pullup + P-channel active pullup (2µs pulse); supports bidirectional reset I/Os and fast rise time on capacitive buses. |
| VCC Operating Range | 1.0V to 5.5V; permits valid reset assertion down to ultra-low supply levels before µP logic becomes unreliable. |
| Temperature Range | -40°C to +85°C; qualified for industrial and extended-temperature embedded applications. |
Pinout & Package
SOT143 package: 4-pin surface-mount, lead-free (indicated by '+' suffix), -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 4.30V. |
| MR | Manual reset input | Active-low input; asserts reset when pulled low; includes internal 63kΩ pullup for NC operation. |
| RESET | Bidirectional reset output | Open-drain-like output with integrated 4.7kΩ pullup and P-channel active pullup; interfaces directly with 68HC11-style bidirectional reset pins. |
| GND | Ground reference | Return path for VCC, MR, and RESET circuits; must be low-impedance for accurate threshold sensing. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional RESET output architecture | Enables direct interface with µPs like 68HC11 that distinguish internal vs. external reset sources via timing-based protocol. |
| Factory-trimmed 4.30V reset threshold | Eliminates external resistor network; achieves ±1.8% accuracy at +25°C and ±2.5% over full temperature range. |
| 20ms minimum reset timeout | Guarantees sufficient hold time for power rail stabilization and oscillator startup in µP-based systems. |
| Integrated 4.7kΩ pullup + 2µs active P-channel pullup | Reduces RESET rise time under capacitive loading (e.g., multi-device buses), preventing false external-reset interpretation. |
| Debounced MR input with 63kΩ internal pullup | Supports direct SPST switch connection to GND; no external RC debounce required in most environments. |
Applications
| Portable Medical Monitors | Industrial PLC Controllers |
|---|---|
Use Scenario: Battery-powered ECG or glucose meter requiring guaranteed reset during cold-start and brownout. IC Role / Device Role / Timing Role: Voltage supervisor asserting bidirectional RESET to ARM Cortex-M0+ MCU during VCC ramp-up and transient dips. Use Value: 5µA quiescent current extends battery life; 4.30V threshold matches Li-ion discharge profile; 20ms timeout ensures reliable core initialization. |
Use Scenario: DIN-rail mounted controller exposed to 24VDC supply fluctuations in factory automation. IC Role / Device Role / Timing Role: Primary reset source monitoring 3.3V LDO output feeding FPGA and communication ICs. Use Value: Immunity to sub-100ns VCC transients prevents spurious resets; SOT143 footprint minimizes PCB area in space-constrained modules. |
| Smart Energy Meters | Automotive Body Control Modules |
Use Scenario: Revenue-grade meter with dual-supply (3.3V logic, 1.8V RTC) needing coordinated reset sequencing. IC Role / Device Role / Timing Role: Supervises main 3.3V rail and triggers system-wide reset via shared RESET net tied to multiple SoCs. Use Value: Bidirectional RESET allows master MCU to detect and log cause of reset (power fault vs. watchdog timeout); 63kΩ MR pullup simplifies front-panel reset button integration. |
Use Scenario: Low-voltage tolerant BCM operating from 9–16V battery with LDO-regulated 5V/3.3V rails. IC Role / Device Role / Timing Role: Monitors 3.3V domain powering CAN transceiver and microcontroller; asserts RESET during cranking-induced brownout. Use Value: Valid operation down to VCC = 1.0V ensures reset assertion even during deep battery sag; ±2.5% tempco maintains accuracy across under-hood thermal range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US43D2+ | Open-drain RESET output (no internal pullup or active pullup); requires external 4.7kΩ pullup resistor. | Lacks bidirectional reset support; unsuitable for 68HC11-style µPs requiring active pullup for reset-source arbitration. | Select only if target µP uses standard open-drain reset input and board layout already includes pullup. |
| TPS3808G33DBVR | Fixed 3.3V reset threshold; 200ms default timeout (adjustable via capacitor); 1.6µA supply current. | Designed for lower-threshold monitoring (3.3V systems); lacks MR input and bidirectional RESET capability. | Prefer for ultra-low-power 3.3V-only applications where manual reset and bidirectional arbitration are unnecessary. |
Compared with MAX6314US43D2+, MAX6315US43D2+ requires external pullup and cannot support reset-source identification protocols, while TPS3808G33DBVR offers lower current but lacks MR input and bidirectional functionality - making MAX6314US43D2+ uniquely suited for legacy µP designs requiring 4.30V monitoring and 68HC11-compatible reset signaling.
Availability
MAX6314US43D2+ 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 and long-term lifecycle support.
Supply support for MAX6314US43D2+ 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 analog, mixed-signal, and power-management ICs for industrial, communications, computing, and consumer applications.
The MAX6314 series is part of Maxim's supervisory IC product line, engineered specifically for reliable power-on reset, brownout detection, and manual reset integration in µP-based systems with stringent voltage and timing requirements.
FAQ
What is the exact reset threshold voltage of the MAX6314US43D2+?
The MAX6314US43D2+ has a factory-trimmed nominal reset threshold of 4.30V, 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 production and specified in the Ordering Information table as "NOMINAL VTH (V) = 4.30".
Does the MAX6314US43D2+ support bidirectional reset communication with the Motorola 68HC11?
Yes, the MAX6314US43D2+ is explicitly designed for bidirectional reset compatibility with the Motorola 68HC11 and similar µPs. Its RESET output includes both an N-channel pulldown and a parallel 4.7kΩ pullup plus P-channel active pullup, enabling the µP to drive RESET low and detect external assertion - a requirement for the 68HC11's reset-source arbitration protocol.
What is the minimum reset timeout period for the MAX6314US43D2+?
The MAX6314US43D2+ provides a minimum reset timeout period of 20ms, as indicated by the "D2" suffix in the part number and confirmed in the Electrical Characteristics table under "tRP". This ensures the RESET signal remains asserted long enough for stable power rail recovery and µP clock initialization.
Can the manual reset input (MR) of the MAX6314US43D2+ be left unconnected?
Yes, the MR pin of the MAX6314US43D2+ features an internal 63kΩ pullup resistor, so it may be left floating (unconnected) if manual reset functionality is not required. When used, a normally open momentary switch between MR and GND provides fully debounced reset initiation without external components.
Is the MAX6314US43D2+ available in lead-free packaging?
Yes, the "+" suffix in MAX6314US43D2+ denotes lead-free packaging per JEDEC standards. This replaces the "-T" suffix used for leaded versions, and the device complies with RoHS requirements. The SOT143 package is qualified for reflow soldering and operates across -40°C to +85°C.
MAX6314US43D2+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.3V
- 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
MAX6314US43D2+ FAQ
1.How can I place an order for MAX6314US43D2+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6314US43D2+ 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 MAX6314US43D2+ reliable?
The price and inventory of MAX6314US43D2+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6314US43D2+ is usually 5 days.
3.What payment methods are accepted for MAX6314US43D2+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6314US43D2+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6314US43D2+?
MAX6314US43D2+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6314US43D2+ 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 MAX6314US43D2+?
For technical support, including MAX6314US43D2+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6314US43D2+ requirements.
6.How does Aetrix verify that MAX6314US43D2+ is sourced from the original manufacturer or authorized distributors?
All MAX6314US43D2+ 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 MAX6314US43D2+ meets industry standards.
7.What is the process for return or replacement of MAX6314US43D2+?
All MAX6314US43D2+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6314US43D2+, 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 MAX6314US43D2+ part is unused and in its original packaging.
Return procedure for MAX6314US43D2+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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