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Analog Devices Inc./Maxim Integrated MAX6314US47D2
- Part No.:
- MAX6314US47D2
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6314US47D2.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,416
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Product details
Overview
MAX6314US47D2 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 4.70V 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 MAX6314US47D2 datasheet, MAX6314US47D2 pinout, MAX6314US47D2 application, or MAX6314US47D2 equivalent, key selection criteria include bidirectional RESET compatibility, precise 4.70V 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 MAX6314US47D2 implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider to set its nominal 4.70V reset threshold. Its reset generator includes an internally programmed 20ms timeout timer that restarts on every VCC dip below threshold or MR assertion.
The RESET output combines an n-channel pulldown, a 4.7kΩ passive pullup, and a p-channel active pullup enabled for 2µs after RESET transitions from low to high - enabling fast rise time (<350ns typical) even under 390pF load and multiple devices on the reset bus.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.70V ±1.8% at +25°C; ensures reliable detection of VCC falling below safe operating level for 5V systems |
| Reset Timeout Period | 20ms minimum; guarantees µP remains held in reset long enough for stable power rail recovery |
| Supply Current | 5µA typical at +25°C; enables use in battery-critical applications without significant drain |
| VCC Operating Range | 1.0V to 5.5V; supports operation down to brownout levels while maintaining RESET validity |
| MR Input Threshold | 0.3 × VCC (max); ensures robust noise immunity and clean manual reset activation |
| RESET Rise Time | 333ns typical (CL = 100pF); meets timing requirements for fast µPs like 68HC11 with two E-clock sampling windows |
| Reset Threshold Tempco | 60ppm/°C; maintains tight threshold stability across -40°C to +85°C industrial temperature range |
Pinout & Package
SOT143 (4-pin, surface-mount) package with 1.3mm × 2.9mm footprint and 0.95mm height; lead-free and RoHS-compliant options available.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply voltage input and reset threshold monitor | Monitored node for brownout detection; powers internal circuitry and enables RESET functionality above 1.0V |
| MR | Manual reset input | Active-low input with 63kΩ internal pullup; asserts reset when pulled low, no external components required |
| RESET | Bidirectional reset output | Combines n-channel sink, 4.7kΩ pullup, and p-channel active pullup; interfaces directly with 68HC11-style bidirectional reset pins |
| GND | Ground reference | Return path for all internal circuitry and reset current; must be low-impedance for accurate threshold sensing |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional RESET interface | Enables direct connection to µPs like 68HC11 that sample RESET state post-reset to distinguish internal vs. external reset sources |
| Factory-trimmed 4.70V threshold | Eliminates need for external resistor dividers or calibration; achieves ±1.8% accuracy at room temperature |
| Integrated 4.7kΩ pullup + active p-channel pullup | Reduces RESET rise time by >5× vs. passive-only solutions, ensuring valid logic-high detection within tight µP timing windows |
| 20ms minimum reset timeout | Guarantees sufficient hold time for full system stabilization after VCC recovery, preventing premature code execution |
| 5µA quiescent current | Extends battery life in portable instrumentation and handheld controllers without compromising supervision reliability |
Applications
| Portable Medical Monitors | Industrial PLC Controllers |
|---|---|
Use Scenario: Battery-powered ECG or glucose meter requiring guaranteed reset during battery voltage sag or cold-start conditions. IC Role / Device Role / Timing Role: Supervisory IC monitoring VCC and asserting bidirectional RESET to initialize microcontroller upon power-up or brownout. Use Value: Prevents corrupted memory writes or erratic behavior by holding µP in reset until 4.70V rail stabilizes for ≥20ms - validated across -40°C to +85°C. | Use Scenario: DIN-rail mounted programmable logic controller exposed to wide input voltage fluctuations in factory environments. IC Role / Device Role / Timing Role: Voltage supervisor providing deterministic reset initiation and timing for safety-critical control firmware boot sequence. Use Value: Immunity to <100ns VCC transients avoids spurious resets; ±2.5% threshold accuracy over temperature ensures consistent trip point across operating range. |
| Smart Energy Meters | Automotive Body Control Modules |
Use Scenario: Revenue-grade electricity meter with dual-supply architecture (main + backup battery) needing fail-safe reset coordination. IC Role / Device Role / Timing Role: Primary VCC supervisor asserting RESET to main µP when AC-derived supply drops below 4.70V during grid sags. Use Value: Integrated MR input allows external tamper-detection circuits to trigger reset independently; no additional debounce components needed. | Use Scenario: Low-power BCM managing door locks, lighting, and window controls powered from vehicle battery with transient-rich 12V rail. IC Role / Device Role / Timing Role: Reset supervisor interfacing with bidirectional reset-capable automotive µC (e.g., RH850 derivative) to support diagnostic reset source identification. Use Value: Active pullup ensures RESET reaches 0.8×VCC within 500ns even with 300pF bus capacitance - critical for ISO 16750-2 pulse immunity compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US47D2-T | Open-drain RESET output (no internal pullup); requires external 4.7kΩ pullup resistor | Suitable only where µP reset pin is unidirectional and externally pulled up | Select MAX6315US47D2-T only if bidirectional reset interface is unnecessary and board layout allows external pullup placement |
| TPS3808G33DBVR | Fixed 3.3V threshold; 200ms default timeout (adjustable via capacitor); higher 8µA ICC | Designed for 3.3V systems; lacks bidirectional RESET capability and active pullup | Choose TPS3808G33DBVR only for 3.3V applications requiring longer timeout or adjustable delay; not functionally interchangeable with MAX6314US47D2 |
Compared with MAX6314US47D2, MAX6315US47D2-T omits the integrated pullup and active pullup transistor, increasing BOM count and limiting µP compatibility, while TPS3808G33DBVR targets different voltage domains and lacks bidirectional reset support - making MAX6314US47D2 uniquely suited for 4.7V 68HC11-compatible systems requiring minimal external components and fast RESET rise time.
Availability
MAX6314US47D2 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 guaranteed performance across -40°C to +85°C.
Supply support for MAX6314US47D2 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 family delivers highly accurate, low-power µP supervisory circuits optimized for systems requiring deterministic reset timing, bidirectional reset compatibility, and minimal external component count - especially in space-constrained portable and automotive electronics.
FAQ
What is the exact reset threshold voltage and tolerance for MAX6314US47D2?
The MAX6314US47D2 has a factory-trimmed nominal reset threshold of 4.70V, with ±1.8% accuracy at +25°C and ±2.5% over the full -40°C to +85°C operating temperature range. This specification is confirmed in the Electrical Characteristics table of the official MAX6314 datasheet (Rev 2, 12/05), and applies specifically to the D2 variant with 20ms timeout.
Does MAX6314US47D2 require an external pull-up resistor on the RESET pin?
No, MAX6314US47D2 does not require an external pull-up resistor. It integrates a 4.7kΩ passive pull-up resistor in parallel with a p-channel active pull-up transistor, enabling direct interface with bidirectional reset pins like those on the 68HC11. This eliminates external components and ensures fast RESET rise time even under capacitive loads up to 390pF.
Can MAX6314US47D2 be used with microcontrollers other than the 68HC11?
Yes, MAX6314US47D2 is compatible with any µP or µC featuring a bidirectional reset I/O pin that samples the RESET line state after initial deassertion - including derivatives of the 68HC11, certain Renesas RL78 variants, and custom ASICs implementing similar reset-source discrimination logic. Its electrical interface (push-pull-like behavior with active pullup) is not limited to Motorola parts.
What is the minimum VCC voltage at which MAX6314US47D2 guarantees RESET output validity?
MAX6314US47D2 guarantees RESET output validity down to VCC = 1.0V, where it maintains a logic-low state with sink capability. Below 1.0V, RESET becomes high-impedance. For applications requiring asserted RESET down to 0V, a 100kΩ external pull-down resistor on the RESET pin is recommended - a solution explicitly documented in the MAX6314 datasheet Figure 3.
How does the manual reset (MR) input behave on MAX6314US47D2?
The MR input on MAX6314US47D2 is active-low with an internal 63kΩ pull-up resistor. Asserting MR low forces RESET low immediately and holds it low for the full 20ms timeout period after MR returns high. If unused, MR may be left floating (due to internal pull-up) or tied to VCC; no external components are required for basic operation.
MAX6314US47D2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.7V
- 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-23-4
MAX6314US47D2 FAQ
1.How can I place an order for MAX6314US47D2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6314US47D2 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 MAX6314US47D2 reliable?
The price and inventory of MAX6314US47D2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6314US47D2 is usually 5 days.
3.What payment methods are accepted for MAX6314US47D2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6314US47D2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6314US47D2?
MAX6314US47D2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6314US47D2 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 MAX6314US47D2?
For technical support, including MAX6314US47D2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6314US47D2 requirements.
6.How does Aetrix verify that MAX6314US47D2 is sourced from the original manufacturer or authorized distributors?
All MAX6314US47D2 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 MAX6314US47D2 meets industry standards.
7.What is the process for return or replacement of MAX6314US47D2?
All MAX6314US47D2 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6314US47D2, 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 MAX6314US47D2 part is unused and in its original packaging.
Return procedure for MAX6314US47D2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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