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Analog Devices Inc./Maxim Integrated MAX6314US46D2+T
- Part No.:
- MAX6314US46D2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6314US46D2+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,496
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Product details
Overview
MAX6314US46D2+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., Motorola 68HC11). It features a factory-trimmed 4.63V 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 detection.
For engineers reviewing the MAX6314US46D2+T datasheet, MAX6314US46D2+T pinout, MAX6314US46D2+T application, or MAX6314US46D2+T equivalent, key selection criteria include bidirectional RESET compatibility, precise 4.63V threshold tolerance, 20ms timeout timing, immunity to short VCC transients, and absence of external pull-up requirements due to integrated 4.7kΩ resistor and active P-channel pullup.
Technical Context
The MAX6314US46D2+T implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider to set the 4.63V reset threshold, and includes an internal timer that guarantees RESET remains asserted for ≥20ms after VCC rises above threshold or MR deasserts. Its bidirectional RESET output combines an N-channel pulldown, P-channel active pullup, and 4.7kΩ passive pullup-enabling direct interface to µPs like the 68HC11 without external components.
It incorporates a 63kΩ internal MR pullup, debounced manual reset input, glitch rejection (100ns), and operates across -40°C to +85°C. The device asserts RESET when VCC falls below 4.63V or MR is pulled low, and holds RESET low until both conditions clear and the 20ms timeout expires-ensuring robust power-up sequencing and brownout recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V nominal; factory-laser-trimmed for ±1.8% accuracy at +25°C, enabling precise power-rail monitoring without calibration. |
| Reset Timeout Period | ≥20ms minimum; internally programmed delay ensures µP reset state is held long enough for stable power-up initialization. |
| Supply Current | 5µA typical at +25°C; ultra-low quiescent current extends battery life in portable and always-on systems. |
| RESET Output Type | Bidirectional with integrated 4.7kΩ pullup + P-channel active pullup; eliminates need for external pullup and supports µP-initiated reset handshaking. |
| MR Input | Logic-compatible with internal 63kΩ pullup; accepts momentary switch to GND for manual reset-no external debounce required. |
| Operating Temp Range | -40°C to +85°C; qualified for industrial and embedded applications where ambient temperature varies widely. |
| VCC Operating Range | 1.0V to 5.5V; functional reset assertion guaranteed down to VCC = 1V, supporting wide-input power architectures. |
Pinout & Package
SOT143 (4-pin) surface-mount package with exposed pad option; compact 2.9mm × 1.5mm footprint ideal for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply voltage and reset threshold monitor input | Primary power rail input; internally divided to compare against 4.63V reference-asserts reset when falling below threshold. |
| MR | Manual reset input | Active-low input with 63kΩ internal pullup; logic low forces reset regardless of VCC level-used for operator-triggered or test-mode reset. |
| RESET | Bidirectional reset output | Combines N-channel pulldown, P-channel active pullup, and 4.7kΩ resistor; enables µP to drive low and detect external reset source via timing handshake. |
| GND | Ground reference | Return path for all internal circuitry and reset comparator; must be low-impedance connection to ensure accurate threshold sensing. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional RESET interface | Enables 68HC11-style reset source identification-µP distinguishes self-initiated vs. supervisor-initiated reset by sampling RESET state after release. |
| Factory-trimmed 4.63V threshold | Eliminates external resistor network and calibration; achieves ±1.8% accuracy at +25°C and ±2.5% over full temperature range. |
| Integrated 4.7kΩ pullup + active P-channel pullup | Reduces RESET rise time under capacitive load (e.g., multi-device bus); meets 500ns timing window for 4MHz µP E-clock cycles. |
| Immunity to short VCC transients | Rejects glitches ≤100ns duration (at 1mV/µs slew rate), preventing spurious resets during switching noise or supply coupling events. |
| Ultra-low 5µA supply current | Minimizes standby power draw in battery-backed systems-supports >10-year operation on coin-cell batteries in low-duty-cycle applications. |
Applications
| Portable Medical Monitors | Industrial PLC Controllers |
|---|---|
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: Supervisory IC asserting reset during brownout events below 4.63V and holding reset ≥20ms to prevent firmware corruption during recovery. Use Value: Prevents invalid sensor readings or unsafe actuation by ensuring µP only resumes execution after stable VCC and full initialization. |
Use Scenario: DIN-rail mounted controller subjected to 24V DC supply ripple and ESD transients in factory automation. IC Role / Device Role / Timing Role: Voltage monitor interfacing bidirectionally with ARM-based µP to distinguish watchdog timeout resets from power-fail resets. Use Value: Enables deterministic fault logging and safe I/O shutdown by preserving reset source information without external logic. |
| Smart Energy Meters | Automotive Body Control Modules |
Use Scenario: Revenue-grade meter with tamper-detection circuitry requiring clean power-up sequence after capacitor hold-up decay. IC Role / Device Role / Timing Role: Reset generator with 4.63V threshold aligned to MCU's VDDIO specification and 20ms timeout matching boot ROM latency. Use Value: Guarantees EEPROM write protection and secure bootloader activation before application code execution begins. |
Use Scenario: 12V automotive subsystem experiencing load-dump and cold-crank voltage excursions. IC Role / Device Role / Timing Role: Supervisory circuit asserting reset during cranking dips <4.63V and providing manual reset via dashboard switch for service mode entry. Use Value: Eliminates need for discrete pullup and debounce components-reducing BOM count and improving layout reliability in harsh environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US46D2+T | Open-drain RESET output (no internal pullup or active pullup); requires external 4.7kΩ pullup resistor. | Lacks bidirectional reset capability-cannot support 68HC11-style reset source identification protocol. | Select when µP has dedicated unidirectional reset input and board space allows external pullup. |
| TPS3808G33DBVR | Fixed 3.3V reset threshold; 200ms default timeout (adjustable via capacitor); no MR input; push-pull RESET output. | Not compatible with 4.63V monitoring or manual reset requirement; intended for fixed-VDD systems only. | Choose only if system uses 3.3V rail and does not require MR functionality or bidirectional signaling. |
Compared with MAX6314US46D2+T, MAX6315US46D2+T lacks integrated pullup and bidirectional support-increasing component count and limiting reset-source diagnostics-while TPS3808G33DBVR offers different threshold and no MR, making it unsuitable for 4.63V monitoring or manual intervention use cases.
Availability
MAX6314US46D2+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, long-term lifecycle support, and lead-free compliance.
Supply support for MAX6314US46D2+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, mixed-signal, and power-management ICs for industrial, computing, communications, and consumer applications.
The MAX6314 series was developed specifically for µP supervisory functions in resource-constrained systems-emphasizing low power, high accuracy, and seamless integration with bidirectional reset architectures like the 68HC11.
FAQ
What is the exact reset threshold voltage for MAX6314US46D2+T?
The MAX6314US46D2+T has a factory-trimmed nominal reset threshold of 4.63V, 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-distinct from nearby variants like MAX6314US47D2+T (4.70V) or MAX6314US45D2+T (4.50V).
Does MAX6314US46D2+T require an external pull-up resistor on the RESET pin?
No, MAX6314US46D2+T does not require an external pull-up resistor. It integrates a 4.7kΩ passive pullup resistor in parallel with an active P-channel pullup transistor-enabling fast rise times on capacitive reset buses and eliminating external components needed for bidirectional µP interfaces like the 68HC11.
What is the minimum reset timeout period for MAX6314US46D2+T?
The MAX6314US46D2+T has a minimum reset timeout period of 20ms, as indicated by the "D2" suffix in the part number. This internally programmed delay ensures RESET remains asserted long enough for reliable µP initialization after VCC rises above 4.63V or after manual reset (MR) is released.
Can MAX6314US46D2+T interface with microcontrollers other than the 68HC11?
Yes, MAX6314US46D2+T can interface with any µP or µC featuring a bidirectional reset I/O pin that supports open-drain or open-collector behavior-including derivatives of the 68HC11 family and certain ARM Cortex-M devices with configurable reset pins. Its RESET output architecture is explicitly designed for such handshaking protocols.
Is MAX6314US46D2+T RoHS-compliant and lead-free?
Yes, MAX6314US46D2+T is lead-free and RoHS-compliant. The "+T" suffix denotes lead-free packaging per Maxim's ordering convention-replacing the legacy "-T" designation. It meets JEDEC J-STD-020 moisture sensitivity level 1 and is supplied in tape-and-reel format only.
MAX6314US46D2+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:
- 4.63V
- 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
MAX6314US46D2+T FAQ
1.How can I place an order for MAX6314US46D2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6314US46D2+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 MAX6314US46D2+T reliable?
The price and inventory of MAX6314US46D2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6314US46D2+T is usually 5 days.
3.What payment methods are accepted for MAX6314US46D2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6314US46D2+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6314US46D2+T?
MAX6314US46D2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6314US46D2+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 MAX6314US46D2+T?
For technical support, including MAX6314US46D2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6314US46D2+T requirements.
6.How does Aetrix verify that MAX6314US46D2+T is sourced from the original manufacturer or authorized distributors?
All MAX6314US46D2+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 MAX6314US46D2+T meets industry standards.
7.What is the process for return or replacement of MAX6314US46D2+T?
All MAX6314US46D2+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6314US46D2+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 MAX6314US46D2+T part is unused and in its original packaging.
Return procedure for MAX6314US46D2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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