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Analog Devices Inc./Maxim Integrated MAX6314US31D3+
- Part No.:
- MAX6314US31D3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6314US31D3+.pdf
- Description:
- MAX6314 68HC11/BIDIRECTIONAL-COM
- Quantity:
- Payment:
- Shipping:
Inventory:3,699
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Product details
Overview
MAX6314US31D3+ 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, 140ms minimum reset timeout period, ±2.5% threshold accuracy over temperature, 5µA supply current, and SOT143 package. Used in portable/battery-powered equipment requiring reliable power-on and brownout reset control.
For engineers reviewing the MAX6314US31D3+ datasheet, MAX6314US31D3+ pinout, MAX6314US31D3+ application, or MAX6314US31D3+ equivalent, key selection criteria include bidirectional RESET compatibility, precise 3.08V VTH tolerance, 140ms timeout stability across -40°C to +85°C, internal 4.7kΩ pullup + active P-channel pullup, and immunity to sub-100µs VCC transients.
Technical Context
The MAX6314US31D3+ implements a precision voltage-monitoring comparator with laser-trimmed resistive divider to detect VCC falling below 3.08V ±2.5%, triggering a reset assertion that persists for ≥140ms after VCC recovers. Its RESET output combines an N-channel pulldown, 4.7kΩ passive pullup, and P-channel active pullup enabled for 2µs upon rising-edge detection - enabling fast rise time (<350ns at CL=100pF) critical for multi-device reset bus timing compliance with 68HC11-style bidirectional protocols.
It integrates a manual reset input (MR) with 63kΩ internal pullup, glitch rejection (100ns), and debounced response; MR assertion forces RESET low regardless of VCC state, and reset remains active for the full 140ms timeout after MR release. The device operates from 1.0V to 5.5V VCC, draws only 5µA at +25°C, and maintains valid RESET sinking down to VCC = 1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTH Nominal | 3.08V - factory-trimmed threshold for reliable brownout detection in 3.3V systems |
| Reset Timeout (tRP) | ≥140ms - ensures sufficient hold time for µP initialization after power recovery |
| Supply Current (ICC) | 5µA at +25°C - enables ultra-low-power operation in battery-backed applications |
| RESET Output Type | Bidirectional with 4.7kΩ pullup + active P-channel pullup - eliminates external components for 68HC11 interface |
| VTH Accuracy | ±2.5% over -40°C to +85°C - guarantees consistent reset behavior across industrial temperature range |
| MR Input Threshold | VIL = 0.3×VCC, VIH = 0.7×VCC - robust noise margin for manual reset activation |
| Immunity to VCC Transients | Rejects <100µs negative glitches at 100mV overdrive - prevents false resets in noisy power environments |
Pinout & Package
SOT143 package: 4-pin surface-mount, 1.3mm × 2.9mm footprint, -40°C to +85°C operating range, lead-free compliant (indicated by '+' suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply voltage input and reset threshold monitor | Primary power rail connection; internal voltage divider references this node to generate 3.08V trip point |
| MR | Manual reset input | Active-low logic input with 63kΩ internal pullup; asserts reset when pulled ≤0.3×VCC |
| RESET | Bidirectional reset output | Open-drain–compatible output with integrated 4.7kΩ pullup + 2µs active P-channel pullup for fast rise time |
| GND | Ground reference | Return path for all internal circuitry and reset comparator reference |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional RESET interface | Enables direct connection to 68HC11 and similar µPs without external pullup or level-shifting components |
| Factory-trimmed 3.08V threshold | Eliminates need for external resistor network calibration; supports 3.3V system monitoring with margin |
| 140ms minimum reset timeout | Guarantees µP reset hold time exceeds typical boot sequence requirements for embedded controllers |
| 5µA quiescent current | Extends battery life in portable instrumentation and handheld devices during standby |
| Internal MR pullup (63kΩ) | Allows momentary switch-to-GND implementation without external biasing; reduces BOM count |
| Glitch-immune MR input (100ns) | Prevents spurious reset from ESD or EMI on manual reset line in industrial environments |
Applications
| Portable Medical Monitors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered ECG or glucose meter requiring guaranteed reset during Li-ion discharge from 3.6V to 2.8V. IC Role / Device Role / Timing Role: Voltage supervisor asserting RESET when VCC drops below 3.08V, holding for ≥140ms to ensure clean µC restart. Use Value: Prevents corrupted memory writes and firmware lockup during brownout, leveraging ±2.5% VTH stability across temperature. |
Use Scenario: DIN-rail mounted controller with multiple peripherals sharing a common reset bus. IC Role / Device Role / Timing Role: Bidirectional RESET driver enabling 68HC11-based host to distinguish self-initiated vs. supervisor-initiated reset events. Use Value: Active P-channel pullup ensures RESET rises to 0.8×VCC within two E-clock cycles (<500ns @4MHz), even with 390pF total bus capacitance. |
| Smart Energy Meters | Ruggedized Handheld Testers |
Use Scenario: ANSI C12.20-compliant meter exposed to wide ambient temperatures (-25°C to +70°C) and transient-rich AC line coupling. IC Role / Device Role / Timing Role: Primary VCC monitor with 140ms timeout and 100ns MR glitch rejection to suppress noise-induced resets. Use Value: ±2.5% VTH accuracy over temp and immunity to <100µs VCC dips eliminate false resets during load switching. |
Use Scenario: Field-deployed multimeter with pushbutton-initiated calibration reset and battery voltage supervision. IC Role / Device Role / Timing Role: Dual-role supervisor: monitors 3.3V rail and provides debounced MR via internal 63kΩ pullup and 0.1µF optional bypass. Use Value: Eliminates external RC debounce components while maintaining 5µA sleep current for >1-year battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US31D3+ | Open-drain RESET output (no internal pullup); requires external 4.7kΩ pullup resistor | Lacks bidirectional interface capability; unsuitable for 68HC11-style reset arbitration | Select when system uses only unidirectional reset and external pullup is acceptable |
| TPS3808G33DBVR | Fixed 3.3V threshold (not 3.08V); 200ms timeout; 2.5µA ICC; SOT-23-5 package | No MR input; no bidirectional RESET; higher VTH reduces brownout margin in 3.3V systems | Choose for lower quiescent current and tighter VTH tolerance (±0.5%), but verify reset timing and interface compatibility |
Compared with MAX6314US31D3+, MAX6315US31D3+ requires external pullup and cannot support bidirectional reset arbitration, while TPS3808G33DBVR offers lower current and tighter threshold tolerance but lacks MR input and exact 3.08V trip point needed for marginal 3.3V brownout detection.
Availability
MAX6314US31D3+ is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC I/O modules, smart energy meters, and ruggedized handheld testers requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6314US31D3+ 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 industrial, automotive, communications, and computing applications.
The MAX6314 series delivers cost-effective, low-power µP supervision with factory-trimmed thresholds and bidirectional reset capability - engineered specifically for reliability-critical embedded systems where external component reduction and timing predictability are essential.
FAQ
What is the exact reset threshold voltage for MAX6314US31D3+ and how stable is it over temperature?
The MAX6314US31D3+ has a nominal reset threshold of 3.08V, factory-trimmed with ±2.5% accuracy over the full -40°C to +85°C operating range. This stability ensures consistent brownout detection in 3.3V systems across industrial environments without recalibration or external compensation.
Does MAX6314US31D3+ support bidirectional reset communication with the 68HC11 microcontroller?
Yes, the MAX6314US31D3+ is explicitly designed for bidirectional reset compatibility with the Motorola 68HC11. Its RESET output integrates both an N-channel pulldown and a P-channel active pullup in parallel with a 4.7kΩ resistor, enabling the µP to drive RESET low and detect external assertion - a requirement for proper reset source arbitration.
What is the minimum reset timeout period specified for MAX6314US31D3+?
The MAX6314US31D3+ provides a minimum reset timeout period of 140ms. This duration is guaranteed after VCC rises above 3.08V or after manual reset (MR) is deasserted, ensuring sufficient hold time for microcontroller initialization and peripheral stabilization in demanding embedded applications.
Can MAX6314US31D3+ operate with supply voltages below 3.08V?
Yes, the MAX6314US31D3+ functions down to VCC = 1.0V. While reset assertion occurs when VCC falls below 3.08V, the device continues to sink RESET current until VCC drops below 1V, at which point RESET becomes high-impedance. For operation down to 0V, a 100kΩ external pull-down on RESET is recommended.
Is there an internal pullup resistor on the MR pin of MAX6314US31D3+?
Yes, the MAX6314US31D3+ includes a 63kΩ internal pullup resistor on the MR pin. This allows direct connection of a normally open momentary switch between MR and GND for manual reset functionality - no external components are required unless additional noise immunity (e.g., 0.1µF capacitor to GND) is needed in electrically noisy environments.
MAX6314US31D3+ 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:
- -
- Type:
- Power Supply Monitor
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- Output:
- Bidirectional
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-4
MAX6314US31D3+ FAQ
1.How can I place an order for MAX6314US31D3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6314US31D3+ 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 MAX6314US31D3+ reliable?
The price and inventory of MAX6314US31D3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6314US31D3+ is usually 5 days.
3.What payment methods are accepted for MAX6314US31D3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6314US31D3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6314US31D3+?
MAX6314US31D3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6314US31D3+ 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 MAX6314US31D3+?
For technical support, including MAX6314US31D3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6314US31D3+ requirements.
6.How does Aetrix verify that MAX6314US31D3+ is sourced from the original manufacturer or authorized distributors?
All MAX6314US31D3+ 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 MAX6314US31D3+ meets industry standards.
7.What is the process for return or replacement of MAX6314US31D3+?
All MAX6314US31D3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6314US31D3+, 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 MAX6314US31D3+ part is unused and in its original packaging.
Return procedure for MAX6314US31D3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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