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Analog Devices Inc./Maxim Integrated MAX6314US25D4
- Part No.:
- MAX6314US25D4
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6314US25D4.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:717
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Product details
Overview
MAX6314US25D4 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 like the 68HC11. It features a factory-trimmed 2.50V reset threshold, 1120ms 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 protection.
For engineers reviewing the MAX6314US25D4 datasheet, MAX6314US25D4 pinout, MAX6314US25D4 application, or MAX6314US25D4 equivalent, key selection criteria include bidirectional RESET compatibility with 68HC11-style µPs, factory-set 2.5V threshold, 1120ms timeout, immunity to short VCC transients, and absence of external components.
Technical Context
The MAX6314US25D4 implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider to set the 2.50V reset threshold, and an internal timer that guarantees RESET remains asserted for ≥1120ms after VCC rises above threshold or MR deasserts. Its RESET output combines a 4.7kΩ pull-up resistor with a p-channel active pull-up transistor to meet fast rise-time requirements on shared reset buses.
This architecture enables deterministic reset-source discrimination in bidirectional-reset µPs: the device supports the Motorola 68HC11's two-E-clock sampling protocol by ensuring RESET transitions high within ≤500ns even with ≥390pF total line capacitance, eliminating false external-reset misinterpretation in multi-device systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.50V nominal, ±1.8% accuracy at +25°C - ensures precise power-fail detection for 2.5V logic systems |
| Reset Timeout Period | 1120ms minimum - guarantees sufficient hold time for full µP initialization and peripheral stabilization |
| Supply Current | 5µA typical at +25°C - enables multi-year battery life in portable applications |
| VCC Operating Range | 1.0V to 5.5V - supports operation down to near-zero VCC for valid reset assertion during deep brownout |
| MR Input Threshold | 0.3 × VCC (max), 0.7 × VCC (min) - ensures robust manual reset triggering across supply range |
| RESET Rise Time | 333ns max (CL = 100pF), 666ns max (CL = 200pF) - meets 68HC11's two-E-clock timing window at 4MHz |
| Reset Threshold Tempco | 60ppm/°C - maintains tight threshold stability over -40°C to +85°C industrial temperature range |
Pinout & Package
SOT143 (4-pin, surface-mount) package with 1.3mm × 2.9mm footprint, -40°C to +85°C operating temperature range, and lead-free option available.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply voltage input and reset threshold monitor node | Direct connection to system VCC rail; internally divided to compare against 2.50V reference |
| MR | Manual reset input | Active-low input with 63kΩ internal pull-up; asserts reset when pulled low, no external debounce required |
| RESET | Bidirectional reset output | Combines n-channel pulldown, p-channel active pull-up, and 4.7kΩ passive pull-up to interface directly with 68HC11-style bidirectional reset I/O |
| GND | Ground reference | System ground return for all internal comparators, timers, and output drivers |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional RESET output | Integrates 4.7kΩ pull-up + p-channel active pull-up to satisfy 68HC11's fast-rise requirement without external components |
| Factory-trimmed 2.50V threshold | Eliminates need for external resistor dividers or calibration; guaranteed ±1.8% accuracy at +25°C |
| 1120ms minimum timeout | Ensures µP and peripherals fully initialize before release; exceeds typical boot sequence durations |
| 5µA quiescent current | Enables use in always-on battery-backed systems with multi-year operational life |
| Immunity to short VCC transients | Rejects glitches ≤100ns at 100mV overdrive - prevents spurious resets from switching noise or ESD |
Applications
| Portable Medical Monitors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Battery-powered handheld ECG or glucose meter requiring guaranteed reset during battery insertion, low-battery brownout, or cold-start. IC Role / Device Role / Timing Role: Supervisory circuit asserting bidirectional RESET to ARM Cortex-M0+ µP upon VCC drop below 2.50V or MR press. Use Value: 5µA supply current extends single-CR2032 battery life beyond 3 years; 1120ms timeout ensures ADC calibration completes before firmware execution. |
Use Scenario: DIN-rail mounted PLC module operating in noisy factory environments with fluctuating 24VDC supplies stepped to 2.5V logic rails. IC Role / Device Role / Timing Role: Voltage supervisor monitoring post-regulation 2.5V rail, asserting RESET during undervoltage events caused by load transients or wiring faults. Use Value: ±2.5% threshold accuracy over temperature prevents nuisance resets at 85°C ambient; 60ppm/°C tempco maintains trip point stability across thermal cycling. |
| Smart Utility Meters | Automotive Body Control Modules |
|
Use Scenario: AMI electricity meter with supercapacitor backup, needing deterministic reset when main power fails and backup engages. IC Role / Device Role / Timing Role: Bidirectional reset controller interfacing with TI MSP430 µP to distinguish between power-fail resets (external) and watchdog timeouts (internal). Use Value: Dual-pullup RESET architecture enables reliable source discrimination per 68HC11 protocol, allowing firmware to preserve tamper logs across power-loss events. |
Use Scenario: 12V automotive body control unit with LDO-regulated 2.5V domain powering CAN transceivers and door-lock drivers. IC Role / Device Role / Timing Role: Power supply monitor asserting RESET during cranking-induced brownouts (<6.5V battery) to prevent CAN bus corruption. Use Value: Immunity to 100ns VCC glitches rejects alternator ripple noise; 1.0V minimum VCC operation ensures reset validity down to battery depletion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US25D4-T | Open-drain RESET output (no internal pull-up); identical 2.50V threshold and 1120ms timeout | Requires external 4.7kΩ pull-up; incompatible with bidirectional-reset µPs like 68HC11 | Select only if target µP has dedicated reset input (not bidirectional) and board layout allows external resistor |
| TPS3808G25DBVR | Push-pull RESET output; 2.5V threshold with ±0.5% initial accuracy; 1200ms timeout; 1.5µA supply current | Lacks bidirectional RESET capability; no MR input glitch rejection spec; requires external capacitor for timeout setting | Prefer for ultra-low-power applications where bidirectional reset is unnecessary and higher threshold accuracy is critical |
Compared with MAX6314US25D4, MAX6315US25D4-T removes the integrated pull-up structure-making it unsuitable for 68HC11 interfaces-while TPS3808G25DBVR offers tighter threshold tolerance and lower current but sacrifices MR debounce and bidirectional timing compliance.
Availability
MAX6314US25D4 is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC I/O modules, smart utility meters, and automotive body control modules requiring stable component supply, long-term lifecycle support, and guaranteed factory-trimmed performance.
Supply support for MAX6314US25D4 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, and communications applications.
The MAX6314 family delivers pin-compatible µP supervisors optimized for bidirectional reset interfaces, targeting systems where deterministic reset-source identification and minimal external components are critical design requirements.
FAQ
What is the exact reset threshold voltage and accuracy specification for MAX6314US25D4?
The MAX6314US25D4 has a nominal reset threshold of 2.50V, with ±1.8% accuracy at TA = +25°C and ±2.5% accuracy over the full -40°C to +85°C operating temperature range. This is achieved via laser-trimmed internal resistors and specified in the Electrical Characteristics table under VTH parameter.
Does MAX6314US25D4 support bidirectional reset communication with the 68HC11 microcontroller?
Yes, the MAX6314US25D4 is explicitly designed for bidirectional reset compatibility with the Motorola 68HC11. Its RESET output integrates a 4.7kΩ pull-up resistor and a p-channel active pull-up transistor to ensure RESET rises within the µP's required two-E-clock window, enabling correct reset-source discrimination.
What is the minimum reset timeout period for MAX6314US25D4, and how is it implemented?
The MAX6314US25D4 provides a minimum reset timeout period of 1120ms. This is an internally programmed, fixed-duration interval generated by an on-chip timer that begins counting when VCC rises above 2.50V or when the manual reset (MR) input is deasserted.
Can MAX6314US25D4 operate with supply voltages below 2.5V, and what happens to RESET output behavior?
Yes, the MAX6314US25D4 operates from VCC = 1.0V to 5.5V. When VCC falls below 1.0V, the RESET output becomes high-impedance (open-circuit). For applications requiring valid RESET down to 0V, a 100kΩ pull-down resistor on RESET is recommended to prevent floating states.
Is there an internal pull-up resistor on the MR pin of MAX6314US25D4, and what is its value?
Yes, the MAX6314US25D4 includes a 63kΩ internal pull-up resistor on the MR pin. This allows the pin to be left unconnected when not used, and enables simple manual reset implementation using only a momentary switch from MR to GND-no external components are required.
MAX6314US25D4 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:
- 1.12s Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-4
MAX6314US25D4 FAQ
1.How can I place an order for MAX6314US25D4 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6314US25D4 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 MAX6314US25D4 reliable?
The price and inventory of MAX6314US25D4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6314US25D4 is usually 5 days.
3.What payment methods are accepted for MAX6314US25D4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6314US25D4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6314US25D4?
MAX6314US25D4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6314US25D4 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 MAX6314US25D4?
For technical support, including MAX6314US25D4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6314US25D4 requirements.
6.How does Aetrix verify that MAX6314US25D4 is sourced from the original manufacturer or authorized distributors?
All MAX6314US25D4 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 MAX6314US25D4 meets industry standards.
7.What is the process for return or replacement of MAX6314US25D4?
All MAX6314US25D4 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6314US25D4, 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 MAX6314US25D4 part is unused and in its original packaging.
Return procedure for MAX6314US25D4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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