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Analog Devices Inc./Maxim Integrated MAX6314US31D4-T
- Part No.:
- MAX6314US31D4-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6314US31D4-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,703
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Product details
Overview
MAX6314US31D4-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 3.08V reset threshold, 1120ms minimum reset timeout period, 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 MAX6314US31D4-T datasheet, MAX6314US31D4-T pinout, MAX6314US31D4-T application, or MAX6314US31D4-T equivalent, key selection criteria include bidirectional RESET compatibility, ±2.5% reset threshold accuracy over temperature, immunity to short VCC transients, and absence of external pull-up requirements due to integrated 4.7kΩ resistor + active P-channel pullup.
Technical Context
The MAX6314US31D4-T implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider to set its 3.08V nominal reset threshold. Its reset assertion logic combines VCC monitoring and manual reset (MR) input, with an internally programmed 1120ms timeout after recovery.
The RESET output integrates a 4.7kΩ passive pullup resistor in parallel with a P-channel transistor enabled by a 2µs one-shot, enabling fast rise time (<350ns typical at CL=100pF) even under high capacitive load - critical for multi-device reset buses interfacing with fast µPs like the 68HC11.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V nominal, ±2.5% over -40°C to +85°C - ensures consistent brownout detection across industrial temperature range |
| Reset Timeout Period | 1120ms minimum - guarantees sufficient hold time for full system initialization after power recovery |
| Supply Current | 5µA typical at +25°C - enables ultra-low-power operation in battery-backed systems |
| RESET Output Type | Bidirectional with integrated 4.7kΩ pullup + active P-channel transistor - eliminates external components and supports µP-driven reset acknowledgment |
| MR Input Threshold | 0.3 × VCC max (VIL), 0.7 × VCC min (VIH) - ensures robust noise-immune manual reset triggering |
| VCC Operating Range | 1.0V to 5.5V - supports wide-input monitoring including single-cell Li-ion and 3.3V/5V logic domains |
| MR Glitch Rejection | 100ns - rejects EMI-induced false triggers on manual reset line |
Pinout & Package
SOT143 package: 4-pin, surface-mount, lead-free compatible, -40°C to +85°C operating range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply voltage and reset threshold monitor input | Primary power rail input; internally divided to compare against 3.08V reference - must be decoupled with 0.1µF capacitor |
| MR | Manual reset input | Active-low input with 63kΩ internal pullup; asserts reset when pulled ≤0.3×VCC; debounced internally - no external RC needed |
| RESET | Active-low bidirectional reset output | Combines N-channel pulldown + 4.7kΩ pullup + P-channel active pullup; sinks ≥1.2mA at VCC≥2.5V; rises to 0.8×VCC within two E-cycles on multi-device bus |
| GND | Ground reference | Return path for all internal circuitry and RESET output - must be low-impedance connection to minimize noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional RESET interface | Enables µP self-diagnostics (e.g., 68HC11) by allowing device to drive RESET low and detect external vs. internal reset source via timing-based state sampling |
| Factory-trimmed 3.08V threshold | Eliminates external resistor network and calibration; achieves ±2.5% accuracy over full temperature range without trimming |
| 1120ms minimum timeout | Guarantees reset assertion long enough for slow-starting peripherals (e.g., flash memory, RF modules) to stabilize before µP execution resumes |
| Integrated 4.7kΩ + active pullup | Reduces RESET rise time by >5× versus passive-only pullup - ensures valid high-level detection within 500ns even with 390pF total bus capacitance |
| 5µA quiescent current | Extends battery life in always-on monitoring applications (e.g., medical wearables, remote sensors) without sacrificing reset reliability |
Applications
| Portable Medical Devices | Industrial PLC Controllers |
|---|---|
Use Scenario: Battery-powered glucose meters and pulse oximeters require guaranteed reset during Li-ion discharge from 4.2V to 3.0V. IC Role / Device Role / Timing Role: MAX6314US31D4-T monitors VCC and asserts RESET when voltage drops below 3.08V, holding it for 1120ms to ensure ADC and display subsystems fully reinitialize. Use Value: Prevents corrupted sensor readings or display glitches during brownout by enforcing deterministic restart before firmware executes. |
Use Scenario: Programmable logic controllers operate in electrically noisy factory environments with fluctuating 24VDC-derived 3.3V rails. IC Role / Device Role / Timing Role: MAX6314US31D4-T provides immunity to 100ns VCC transients while asserting RESET on sustained dips - synchronized with watchdog timer to avoid spurious resets. Use Value: Eliminates need for external RC debounce or Schmitt-trigger buffers, reducing BOM count and PCB area in DIN-rail mounted modules. |
| Smart Energy Meters | Automotive Body Control Modules |
Use Scenario: Meters with backup supercapacitors must restart cleanly after AC mains interruption causes VCC to sag from 3.3V to 2.8V. IC Role / Device Role / Timing Role: MAX6314US31D4-T detects the 3.08V threshold crossing and holds RESET for 1120ms, allowing real-time clock and metrology ASICs to recover calibration data. Use Value: Ensures timekeeping continuity and billing accuracy by preventing partial register writes during power transition. |
Use Scenario: BCMs powered from vehicle battery (9–16V) via 3.3V LDO experience cold-crank dips to 6V input, causing downstream 3.3V rail to collapse to ~2.6V. IC Role / Device Role / Timing Role: MAX6314US31D4-T asserts RESET at 3.08V and maintains it until VCC recovers and sustains >3.08V for 1120ms - aligning with CAN transceiver wake-up timing. Use Value: Coordinates reset sequencing between µP, CAN PHY, and LIN interface to prevent bus arbitration errors during engine start. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US31D4-T | Open-drain RESET output (no internal pullup); identical 3.08V threshold and 1120ms timeout | Requires external 4.7kΩ pullup; incompatible with bidirectional µP reset I/Os like 68HC11 | Select when system uses open-drain reset bus architecture or needs level-shifting capability |
| TPS3808G31DBVR | Fixed 3.08V threshold, 1200ms timeout, 1.6µA IQ, but push-pull (not bidirectional) RESET output | Lacks MR input debouncing and bidirectional timing handshake - cannot support 68HC11-style reset source identification | Choose for ultra-low-power applications where bidirectional reset functionality is not required |
Compared with MAX6314US31D4-T, MAX6315US31D4-T requires external pullup and lacks bidirectional capability, while TPS3808G31DBVR offers lower current but forfeits µP-driven reset diagnostics - making MAX6314US31D4-T uniquely suited for legacy 68HC11 and similar bidirectional-reset µP platforms.
Availability
MAX6314US31D4-T is available at Aetrix Electronics and suitable for portable medical devices, industrial PLC controllers, smart energy meters, and automotive body control modules requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX6314US31D4-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 and mixed-signal ICs for power, sensing, and interface applications, with emphasis on high-reliability industrial and automotive markets.
The MAX6314 family delivers cost-effective, pin-compatible µP supervisory solutions optimized for bidirectional reset interfaces and battery-constrained systems - targeting applications where external component reduction and deterministic reset timing are critical.
FAQ
What is the exact reset threshold voltage of the MAX6314US31D4-T?
The MAX6314US31D4-T has a factory-trimmed nominal reset threshold of 3.08V, with ±2.5% accuracy over the full operating temperature range (-40°C to +85°C). This value is laser-trimmed during manufacturing and specified in the Ordering Information table - distinct from other variants like MAX6314US30D4-T (3.00V) or MAX6314US32D4-T (3.20V).
Does the MAX6314US31D4-T require an external pull-up resistor on the RESET pin?
No, the MAX6314US31D4-T does not require an external pull-up resistor. It integrates a 4.7kΩ pull-up resistor in parallel with an active P-channel transistor, enabling fast rise time and direct compatibility with bidirectional µP reset I/Os such as the 68HC11. This eliminates external components and ensures reliable reset bus operation under capacitive loads up to 390pF.
How does the manual reset (MR) input behave on the MAX6314US31D4-T?
The MR input on the MAX6314US31D4-T is active-low with an internal 63kΩ pull-up resistor. A logic low ≤0.3×VCC asserts RESET immediately and holds it active for the full 1120ms timeout after MR returns high. No external debounce circuitry is needed - the internal design rejects transients <100ns, making it suitable for direct switch connection to GND.
Can the MAX6314US31D4-T operate down to 1.0V supply voltage?
Yes, the MAX6314US31D4-T operates across a VCC range of 1.0V to 5.5V. At VCC ≥1.0V, the RESET output is guaranteed to sink ≥80µA while asserted. Below 1.0V, RESET becomes high-impedance - if validity down to 0V is required, a 100kΩ external pull-down resistor on RESET is recommended per Figure 3 in the datasheet.
Is the MAX6314US31D4-T pin-compatible with the MAX811?
Yes, the MAX6314US31D4-T is explicitly stated as pin-compatible with the MAX811 in the datasheet Features section. Both use the SOT143 package with identical pinout (VCC, MR, RESET, GND), enabling drop-in replacement in existing designs - though functional differences exist, including bidirectional RESET capability and tighter threshold accuracy in the MAX6314US31D4-T.
MAX6314US31D4-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:
- 3.08V
- 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-143-4
MAX6314US31D4-T FAQ
1.How can I place an order for MAX6314US31D4-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6314US31D4-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 MAX6314US31D4-T reliable?
The price and inventory of MAX6314US31D4-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6314US31D4-T is usually 5 days.
3.What payment methods are accepted for MAX6314US31D4-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6314US31D4-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6314US31D4-T?
MAX6314US31D4-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6314US31D4-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 MAX6314US31D4-T?
For technical support, including MAX6314US31D4-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6314US31D4-T requirements.
6.How does Aetrix verify that MAX6314US31D4-T is sourced from the original manufacturer or authorized distributors?
All MAX6314US31D4-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 MAX6314US31D4-T meets industry standards.
7.What is the process for return or replacement of MAX6314US31D4-T?
All MAX6314US31D4-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6314US31D4-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 MAX6314US31D4-T part is unused and in its original packaging.
Return procedure for MAX6314US31D4-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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