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Analog Devices Inc./Maxim Integrated MAX6314US25D1
- Part No.:
- MAX6314US25D1
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6314US25D1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,945
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Product details
Overview
MAX6314US25D1 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 2.5V reset threshold, 1ms 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 MAX6314US25D1 datasheet, MAX6314US25D1 pinout, MAX6314US25D1 application, or MAX6314US25D1 equivalent, key selection criteria include bidirectional RESET compatibility, precise 2.5V threshold tolerance, guaranteed reset assertion down to VCC = 1V, immunity to short VCC transients, and absence of external component requirements for manual reset or pull-up.
Technical Context
The MAX6314US25D1 implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider to set its 2.5V nominal reset threshold, achieving ±1.8% accuracy at +25°C and ±2.5% over –40°C to +85°C. Its reset timeout is internally programmed to a minimum of 1ms after VCC rises above threshold or MR deasserts.
The RESET output combines an n-channel pulldown, p-channel active pullup, and parallel 4.7kΩ resistor - enabling direct interface to bidirectional µP reset pins without external components. MR includes a 63kΩ internal pullup and supports debounced manual reset via simple switch-to-GND connection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.50V nominal, ±1.8% accuracy at +25°C - ensures predictable power-up reset point for 2.5V logic systems |
| Reset Timeout Period | 1ms minimum - guarantees sufficient reset hold time for reliable µP initialization |
| Supply Current | 5µA typical at +25°C - enables ultra-low-power operation in battery-critical applications |
| VCC Operating Range | 1.0V to 5.5V - supports valid RESET assertion down to 1V and compatibility with 3.3V/5V systems |
| MR Input Threshold | 0.3 × VCC (max), 0.7 × VCC (min) - ensures robust noise margin for manual reset detection |
| RESET Output Structure | Bidirectional with 4.7kΩ passive pullup + p-channel active pullup - eliminates need for external pullup and accelerates rising edge on capacitive reset buses |
| Tempco | 60ppm/°C - maintains stable threshold across industrial temperature range (–40°C to +85°C) |
Pinout & Package
SOT143 package: 4-pin, surface-mount, small-outline transistor outline with gull-wing leads; footprint compatible with JEDEC MO-178AB standard; thermal resistance θJA = 250°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply voltage input and reset threshold monitor node | Monitored directly by internal precision comparator; powers internal circuitry and defines reset trigger point |
| MR | Manual reset input | Active-low; asserts reset when pulled below 0.3×VCC; includes 63kΩ internal pullup - requires no external resistor if unused |
| RESET | Bidirectional reset output | Combines n-channel sink, p-channel active pullup, and 4.7kΩ resistor - interfaces directly to 68HC11-style bidirectional reset pins without external components |
| GND | Ground reference | Return path for all internal current sources and sinks; must be connected to system ground plane for accurate threshold monitoring |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 2.5V reset threshold | Eliminates external resistor network and calibration effort while delivering ±1.8% accuracy at room temperature |
| 1ms minimum reset timeout | Guarantees µP reset hold time meets minimum initialization requirements for fast-start microcontrollers |
| Bidirectional RESET output architecture | Enables shared reset bus with multiple devices (e.g., µP + peripherals) and supports source-detection logic in 68HC11-compatible systems |
| 5µA quiescent current | Extends battery life in portable instrumentation and handheld controllers where standby power is constrained |
| 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 I/O Modules |
|---|---|
|
Use Scenario: Battery-powered ECG or glucose meter operating from single Li-ion cell with dynamic load-induced VCC droop. IC Role / Device Role / Timing Role: Supervisory circuit asserting reset during brownout to prevent corrupted memory writes or sensor misreads. Use Value: 2.5V threshold aligns with low-voltage cutoff of protected battery management; 5µA ICC minimizes standby drain; bidirectional RESET allows host µP to distinguish self-reset causes. |
Use Scenario: DIN-rail mounted I/O module exposed to 24V DC supply ripple and transient coupling in factory automation. IC Role / Device Role / Timing Role: Primary VCC supervisor ensuring deterministic µP restart after line sags or hot-swap events. Use Value: ±2.5% threshold stability over –40°C to +85°C prevents false resets in uncontrolled environments; MR pin enables field-service reset without power cycle. |
| Smart Energy Meters | Automotive Body Control Units |
|
Use Scenario: Revenue-grade meter with dual-supply architecture (3.3V µP + 5V metrology ASIC) requiring coordinated reset sequencing. IC Role / Device Role / Timing Role: Dedicated 2.5V supervisor for µP domain, triggered only when its supply falls - independent of analog rail behavior. Use Value: No external components reduce BOM count and PCB area; 1ms timeout satisfies EN 62053-21 cold-start timing requirements. |
Use Scenario: Low-power BCM sub-module powered from vehicle battery with wide VCC range (9V–16V) and load-dump transients. IC Role / Device Role / Timing Role: Secondary supervisor monitoring regulated 2.5V LDO output feeding safety-critical µP core logic. Use Value: Immunity to <100ns transients avoids nuisance resets during alternator switching; SOT143 package supports compact layout near µP. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US25D1-T | Open-drain RESET output (no active pullup); identical 2.5V threshold and 1ms timeout | Requires external 4.7kΩ pullup; incompatible with bidirectional reset protocols like 68HC11 | Select when system uses open-drain reset bus or µP has dedicated reset driver with strong pullup capability |
| TPS3808G12DBVR | 2.5V threshold, 20ms default timeout (adjustable via capacitor), 1.6µA ICC, SOT-23-5 package | Lacks bidirectional RESET support; no MR debounce integration; higher pin count due to enable input | Choose for ultra-low-power applications where longer timeout is acceptable and board space permits SOT-23-5 footprint |
Compared with MAX6314US25D1, MAX6315US25D1-T removes bidirectional capability but simplifies reset bus design in open-drain systems, while TPS3808G12DBVR trades interface flexibility for lower current and adjustable timing - neither offers the integrated 4.7kΩ+active-pullup solution optimized for 68HC11-style µPs.
Availability
MAX6314US25D1 is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC I/O modules, smart energy meters, and automotive body control units requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.
Supply support for MAX6314US25D1 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 high-reliability ICs for industrial, automotive, communications, and computing markets.
The MAX6314 series was developed specifically for microprocessor supervision in resource-constrained systems - emphasizing zero-external-component operation, bidirectional reset compatibility, and robustness against supply transients.
FAQ
What is the exact reset threshold voltage of the MAX6314US25D1?
The MAX6314US25D1 has a factory-trimmed nominal reset threshold of 2.50V, 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 Electrical Characteristics table under "Reset Threshold (Note 1)".
Does the MAX6314US25D1 require an external pull-up resistor on the RESET pin?
No, the MAX6314US25D1 does not require an external pull-up resistor. Its RESET output integrates a 4.7kΩ passive pull-up resistor in parallel with a p-channel active pull-up transistor - this configuration eliminates external components while ensuring fast rise times on capacitive reset buses, as confirmed in the Typical Operating Circuit and Reset Output section.
Can the MAX6314US25D1 interface directly with a Motorola 68HC11 microcontroller?
Yes, the MAX6314US25D1 is explicitly designed for bidirectional reset compatibility with the Motorola 68HC11. Its RESET output structure - combining n-channel sink, p-channel active pull-up, and 4.7kΩ resistor - matches the timing and electrical requirements described in the 68HC11 datasheet for reset source discrimination, as detailed in the Functional Diagram and Detailed Description sections.
What is the minimum reset timeout period for the MAX6314US25D1?
The MAX6314US25D1 has a minimum reset timeout period of 1ms, as indicated by the "D1" suffix in its part number and confirmed in the Ordering Information table. This interval begins after VCC rises above the 2.5V threshold or after the MR input is deasserted, and is guaranteed across temperature and supply voltage variations.
Is the manual reset input (MR) of the MAX6314US25D1 debounced internally?
Yes, the MR input of the MAX6314US25D1 is internally debounced. The device specifies a 100ns MR glitch rejection time and a 1µs minimum MR input pulse width, eliminating the need for external RC filtering or digital debounce logic. Additionally, MR includes a 63kΩ internal pull-up resistor, allowing direct connection of a momentary switch to GND without external components.
MAX6314US25D1 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:
- 2.5V
- Output:
- Bidirectional
- Reset:
- Active Low
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-4
MAX6314US25D1 FAQ
1.How can I place an order for MAX6314US25D1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6314US25D1 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 MAX6314US25D1 reliable?
The price and inventory of MAX6314US25D1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6314US25D1 is usually 5 days.
3.What payment methods are accepted for MAX6314US25D1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6314US25D1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6314US25D1?
MAX6314US25D1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6314US25D1 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 MAX6314US25D1?
For technical support, including MAX6314US25D1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6314US25D1 requirements.
6.How does Aetrix verify that MAX6314US25D1 is sourced from the original manufacturer or authorized distributors?
All MAX6314US25D1 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 MAX6314US25D1 meets industry standards.
7.What is the process for return or replacement of MAX6314US25D1?
All MAX6314US25D1 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6314US25D1, 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 MAX6314US25D1 part is unused and in its original packaging.
Return procedure for MAX6314US25D1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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