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Analog Devices Inc./Maxim Integrated MAX6314US26D2-T
- Part No.:
- MAX6314US26D2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6314US26D2-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,754
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Product details
Overview
MAX6314US26D2-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 compatible reset I/Os (e.g., 68HC11). It features a factory-trimmed 2.63V reset threshold, 20ms minimum reset timeout period, ±2.5% threshold accuracy over temperature, 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 MAX6314US26D2-T datasheet, MAX6314US26D2-T pinout, MAX6314US26D2-T application, or MAX6314US26D2-T equivalent, key selection criteria include bidirectional RESET compatibility, precise 2.63V threshold tolerance, guaranteed 20ms reset assertion after VCC recovery, immunity to short VCC transients, and integration of internal 4.7kΩ pullup + active P-channel pullup for fast rise time on shared reset buses.
Technical Context
The MAX6314US26D2-T implements a precision voltage-monitoring comparator with laser-trimmed resistive divider to detect VCC falling below 2.63V ±2.5%, triggering a reset generator with fixed 20ms minimum timeout. Its 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.
Manual reset (MR) input includes internal 63kΩ pullup and 100ns glitch rejection; MR assertion forces RESET low for the full 20ms timeout after deassertion. The device operates across -40°C to +85°C, draws only 5µA at +25°C, and maintains valid RESET output down to VCC = 1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V ±2.5% over -40°C to +85°C - ensures reliable detection of brownout conditions near 2.6V logic rails |
| Reset Timeout Period | 20ms minimum - guarantees sufficient hold time for µP initialization after VCC recovery |
| Supply Current | 5µA typical at +25°C - enables ultra-low-power operation in battery-backed systems |
| RESET Output Type | Bidirectional-compatible with integrated 4.7kΩ pullup + active P-channel pullup - eliminates need for external pullup and supports fast rise time on capacitive reset buses |
| MR Input Glitch Rejection | 100ns - rejects noise spikes on manual reset line without external filtering |
| Operating Voltage Range | 1.0V to 5.5V - supports operation during deep brownout and across multiple supply domains |
| Package | SOT143 (4-pin) - surface-mount footprint compatible with high-density PCB layouts |
Pinout & Package
SOT143 package: 4-pin, surface-mount, -40°C to +85°C operating range, lead-free option available (+T suffix).
| 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 2.63V |
| MR | Manual reset input | Active-low input with internal 63kΩ pullup; asserts reset when pulled low, holds reset for full 20ms timeout after release |
| RESET | Active-low bidirectional reset output | Combines N-channel pulldown, 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 circuitry and reset output current |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional RESET output architecture | Integrates 4.7kΩ passive pullup + P-channel active pullup to ensure sub-500ns rise time on reset bus with up to 400pF load - critical for correct reset source identification in 68HC11-class µPs |
| Factory-trimmed 2.63V reset threshold | Laser-trimmed internal voltage divider provides ±2.5% accuracy over full temperature range - eliminates calibration overhead and external resistor networks |
| 20ms minimum reset timeout | Internally programmed monostable ensures µP has sufficient time to stabilize clocks and peripherals before release - no external timing capacitor required |
| 5µA quiescent current | CMOS design with optimized biasing enables >1-year battery life in coin-cell-powered monitoring applications |
| Immunity to short VCC transients | Rejects <100µs negative-going glitches down to 100mV below threshold - prevents spurious resets in electrically noisy environments |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered wearable ECG sensor continuously monitors heart activity and logs data during intermittent BLE transmission. IC Role / Device Role / Timing Role: MAX6314US26D2-T supervises 3.3V LDO output powering the MCU and analog front-end, asserting reset during battery voltage sag below 2.63V. Use Value: Prevents corrupted memory writes and ADC misreads during brownout by guaranteeing 20ms reset hold time while enabling ultra-low 5µA sleep current to extend battery life. | Use Scenario: DIN-rail mounted PLC module controls solenoid valves in factory automation, powered from 24VDC converted to 3.3V via isolated DC/DC converter. IC Role / Device Role / Timing Role: MAX6314US26D2-T monitors the 3.3V rail and interfaces bidirectionally with the Cortex-M4 µP's reset pin to distinguish between watchdog-initiated and supervisor-initiated resets. Use Value: Enables deterministic fault recovery by allowing the µP to read reset cause flags after boot, while the integrated 4.7kΩ+active pullup ensures reliable reset line rise time despite 300pF bus capacitance from 8 connected I/O cards. |
| Smart Utility Meters | Automotive Body Control Modules |
Use Scenario: AMI electricity meter uses supercapacitor backup to retain metrology data during AC mains interruption. IC Role / Device Role / Timing Role: MAX6314US26D2-T supervises the 2.8V supercap backup rail and triggers controlled shutdown when voltage drops below 2.63V. Use Value: Guarantees clean reset initiation before brownout-induced latch-up, with ±2.5% threshold stability ensuring consistent behavior across automotive-grade temperature range (-40°C to +85°C). | Use Scenario: BCM manages door locks, lighting, and window motors using a 3.3V domain derived from vehicle battery via buck regulator. IC Role / Device Role / Timing Role: MAX6314US26D2-T monitors the 3.3V rail and provides debounced manual reset via dashboard service switch. Use Value: Eliminates need for external RC debounce network on MR pin due to built-in 100ns glitch rejection and internal 63kΩ pullup - reducing BOM count and board space in space-constrained modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US26D2-T | Open-drain RESET output (no internal pullup), same 2.63V threshold and 20ms timeout | Requires external pullup resistor; not compatible with bidirectional µP reset I/Os like 68HC11 | Select when system uses open-drain reset topology or shares reset line with multiple open-drain drivers |
| TPS3808G26DBVR | Push-pull RESET output, 2.63V threshold, 20ms timeout, 1.4µA supply current | Lacks bidirectional interface capability; no active pullup - cannot support µP reset-source discrimination | Select for lowest quiescent current in non-bidirectional reset architectures where fast rise time is less critical |
Compared with MAX6314US26D2-T, MAX6315US26D2-T requires external pullup and cannot interface with bidirectional reset µPs, while TPS3808G26DBVR offers lower ICC but lacks the active pullup needed for reliable reset-source identification on shared buses.
Availability
MAX6314US26D2-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart utility 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 MAX6314US26D2-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 family delivers highly accurate, low-power µP supervisory circuits with factory-trimmed thresholds and integrated reset timing - engineered specifically for robust power monitoring in battery-operated and mission-critical embedded systems.
FAQ
What is the exact reset threshold voltage and tolerance for MAX6314US26D2-T?
The MAX6314US26D2-T has a nominal reset threshold of 2.63V with ±2.5% accuracy over the full operating temperature range (-40°C to +85°C). This value is factory-laser-trimmed and specified in the Electrical Characteristics table under "Reset Threshold (Note 1)" with VTH = 2.63V, min = VTH – 2.5%, max = VTH + 2.5%. The device does not require external calibration or adjustment.
Does MAX6314US26D2-T support bidirectional reset communication with microcontrollers like the 68HC11?
Yes, MAX6314US26D2-T is explicitly designed for bidirectional reset compatibility. Its RESET pin integrates an N-channel pulldown, P-channel active pullup, and parallel 4.7kΩ resistor - enabling it to both drive low and be driven low by the µP, which allows the 68HC11 to distinguish between internal and external reset sources using its two-E-clock sampling protocol.
What is the minimum reset timeout period for MAX6314US26D2-T, and how is it implemented?
The MAX6314US26D2-T provides a minimum reset timeout period of 20ms. This is an internally programmed, fixed-duration monostable timer that begins counting when VCC rises above 2.63V or when MR is released. The timeout is guaranteed minimum - actual duration may vary slightly with temperature and supply voltage but remains ≥20ms under all conditions per datasheet specifications.
Can MAX6314US26D2-T operate with supply voltages below 2.63V, and what happens to RESET output?
Yes, MAX6314US26D2-T operates from VCC = 1.0V to 5.5V. When VCC falls below 1.0V, the RESET output becomes high-impedance (open-circuit) and no longer sinks current. For applications requiring RESET to remain valid down to 0V, a 100kΩ pull-down resistor to GND is recommended - this ensures predictable logic-low state even during deep undervoltage conditions.
Is external debounce required for the manual reset (MR) input on MAX6314US26D2-T?
No, external debounce is not required for the MR input of MAX6314US26D2-T. The device includes internal 100ns glitch rejection and a 63kΩ pullup resistor. A normally open momentary switch from MR to GND is sufficient for manual reset functionality. In noisy environments or with long cables, adding a 0.1µF capacitor from MR to GND provides additional immunity without altering core functionality.
MAX6314US26D2-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:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.63V
- 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
MAX6314US26D2-T FAQ
1.How can I place an order for MAX6314US26D2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6314US26D2-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 MAX6314US26D2-T reliable?
The price and inventory of MAX6314US26D2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6314US26D2-T is usually 5 days.
3.What payment methods are accepted for MAX6314US26D2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6314US26D2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6314US26D2-T?
MAX6314US26D2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6314US26D2-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 MAX6314US26D2-T?
For technical support, including MAX6314US26D2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6314US26D2-T requirements.
6.How does Aetrix verify that MAX6314US26D2-T is sourced from the original manufacturer or authorized distributors?
All MAX6314US26D2-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 MAX6314US26D2-T meets industry standards.
7.What is the process for return or replacement of MAX6314US26D2-T?
All MAX6314US26D2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6314US26D2-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 MAX6314US26D2-T part is unused and in its original packaging.
Return procedure for MAX6314US26D2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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