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Analog Devices Inc./Maxim Integrated MAX6314US26D3-T
- Part No.:
- MAX6314US26D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6314US26D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,175
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Product details
Overview
MAX6314US26D3-T from Maxim Integrated is a low-power CMOS microprocessor supervisory circuit that monitors VCC supply voltage and asserts a bidirectional RESET signal when voltage falls below 2.63V or upon manual reset assertion. It features a factory-trimmed 2.63V reset threshold, 140ms minimum reset timeout period, 5µA supply current, and SOT143 package. It is designed for reliable power-up/power-down sequencing in 68HC11-compatible µP systems.
For engineers reviewing the MAX6314US26D3-T datasheet, MAX6314US26D3-T pinout, MAX6314US26D3-T application, or MAX6314US26D3-T equivalent, key selection criteria include bidirectional reset interface capability, ±2.5% reset threshold accuracy over temperature, immunity to short VCC transients, and compatibility with systems requiring manual reset debounce without external components.
Technical Context
The MAX6314US26D3-T implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider to set its 2.63V reset threshold, with ±2.5% accuracy across –40°C to +85°C. Its reset timeout is fixed at minimum 140ms and generated by an internal timer that resets on every VCC dip below threshold.
The RESET output combines an n-channel pulldown, p-channel active pullup, and 4.7kΩ passive pullup-enabling direct interface to bidirectional reset pins (e.g., 68HC11) while ensuring sub-500ns rise time under 390pF load. MR input includes a 63kΩ internal pullup and accepts logic-low manual reset pulses as short as 1µs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTH Threshold | 2.63V nominal, ±2.5% over –40°C to +85°C - ensures consistent brownout detection across industrial temperature range |
| Reset Timeout (tRP) | 140ms minimum - guarantees sufficient hold time for full µP initialization after power recovery |
| Supply Current (ICC) | 5µA typical at +25°C - enables use in battery-powered systems with multi-year standby life |
| MR Input Pulse Width | 1µs minimum - supports fast, noise-immune manual reset triggering without external debouncing |
| RESET Rise Time | 333ns max (CL = 100pF), 666ns max (CL = 250pF) - meets timing requirements of high-speed µPs like 68HC11 with multiple devices on shared reset bus |
| VCC Operating Range | 1.0V to 5.5V - supports operation down to near-dead-battery conditions while maintaining valid RESET state |
| Reset Immunity | Rejects VCC transients ≤100µs at 100mV overdrive - prevents false resets during switching noise or ESD events |
Pinout & Package
SOT143 (4-pin, 1.3mm × 2.9mm, 0.95mm height) surface-mount package rated for –40°C to +85°C operation. Lead-free option available as MAX6314US26D3+T.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply voltage and reset threshold monitor input | Primary power rail connection; internally divided to generate precise 2.63V reference for reset comparator |
| MR | Manual reset input | Active-low input with 63kΩ internal pullup; asserts reset when pulled low ≥1µs; open-circuit default is high |
| RESET | Bidirectional reset output | Combines n-channel sink, p-channel active pullup, and 4.7kΩ passive pullup - eliminates need for external pullup and ensures fast rise under capacitive load |
| GND | Ground reference | Return path for all internal circuitry and reset output current; must be low-impedance connection for accurate threshold sensing |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional RESET interface | Enables direct connection to 68HC11 and other µPs with bidirectional reset I/O, supporting source-detection logic without external level-shifting or buffering |
| Factory-trimmed 2.63V threshold | Eliminates external resistor network and calibration; achieves ±2.5% accuracy over full temperature range without user adjustment |
| 140ms minimum reset timeout | Guarantees µP core and peripherals fully stabilize before release; avoids race conditions in multi-clock-domain systems |
| 5µA quiescent current | Reduces battery drain in portable equipment; allows integration into always-on monitoring circuits without compromising runtime |
| Integrated MR debounce | Accepts mechanical switch inputs directly; no external RC network required due to internal glitch rejection and 1µs pulse-width sensitivity |
Applications
| Industrial PLC Controller Power Monitoring | Portable Medical Device Power Sequencing |
|---|---|
Use Scenario: Monitoring 3.3V system rail in programmable logic controller during cold start and brownout events. IC Role / Device Role / Timing Role: Voltage supervisor asserting bidirectional RESET to ARM Cortex-M7 µP with integrated watchdog, coordinating firmware recovery and peripheral reinitialization. Use Value: Prevents corrupted register states during partial power-up; 140ms timeout ensures FPGA configuration completes before µP execution begins. | Use Scenario: Supervising dual 2.8V/3.3V rails in handheld glucose meter with lithium coin-cell battery. IC Role / Device Role / Timing Role: Low-current supervisor detecting end-of-life battery sag below 2.63V and triggering controlled shutdown sequence via manual reset button. Use Value: 5µA supply current extends battery life beyond 3 years; MR internal pullup eliminates BOM cost and PCB space for external resistor. |
| Automotive Body Control Module (BCM) | Smart Energy Meter Microcontroller Reset |
Use Scenario: Reset coordination in 12V-to-3.3V converted subsystem powering CAN-enabled door module. IC Role / Device Role / Timing Role: Supervisor interfacing bidirectionally with Renesas RL78 µP to distinguish between watchdog-initiated and power-fail resets using two-E-clock sampling protocol. Use Value: Active p-channel pullup ensures RESET rises within 500ns under 390pF bus capacitance - critical for correct reset-source identification in noisy automotive environment. | Use Scenario: Ensuring deterministic startup of metrology SoC after AC power interruption in DIN-rail energy meter. IC Role / Device Role / Timing Role: Precision reset generator holding µP in reset until 2.63V rail stabilizes post-blackout, then releasing after 140ms minimum delay. Use Value: ±2.5% threshold accuracy prevents premature release during line-sag events; immunity to 100µs transients avoids spurious resets from relay switching noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US26D3-T | Open-drain RESET output (no internal pullup); identical 2.63V threshold and 140ms timeout | Requires external 4.7kΩ pullup resistor; not compatible with bidirectional reset I/O protocols | Select when interfacing with µPs having standard open-drain reset inputs (e.g., many ARM Cortex-M series) and board layout allows external resistor placement |
| TPS3808G33DBVR | Fixed 3.3V threshold, 200ms timeout, 1.6µA ICC, SOT-23-5 package | Lacks MR input and bidirectional RESET; optimized for ultra-low-power 3.3V-only systems | Choose for battery-sensitive designs where 3.3V rail supervision suffices and manual reset is unnecessary |
Compared with MAX6314US26D3-T, MAX6315US26D3-T requires external pullup and cannot support bidirectional reset source detection, while TPS3808G33DBVR offers lower current but lacks MR and 2.63V precision - making MAX6314US26D3-T uniquely suited for 68HC11-class µP systems needing manual reset and exact 2.63V brownout detection.
Availability
MAX6314US26D3-T is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical devices, automotive body control modules, and smart energy meters requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6314US26D3-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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX6314 family was designed specifically for microprocessor reset supervision in systems requiring bidirectional reset interface compatibility, factory-trimmed voltage thresholds, and minimal external components - targeting cost-sensitive, space-constrained embedded control applications.
FAQ
What is the exact reset threshold voltage of the MAX6314US26D3-T?
The MAX6314US26D3-T has a factory-trimmed nominal reset threshold voltage of 2.63V, with ±2.5% accuracy over the full operating temperature range of –40°C to +85°C. This value is laser-trimmed during manufacturing and does not require external calibration. The MAX6314US26D3-T maintains this precision without user adjustment, enabling reliable brownout detection in low-voltage systems.
Does the MAX6314US26D3-T require an external pullup resistor on the RESET pin?
No, the MAX6314US26D3-T does not require an external pullup resistor. It integrates a 4.7kΩ passive pullup in parallel with a p-channel active pullup transistor on the RESET pin, enabling direct interface to bidirectional reset I/Os like those on the 68HC11. This internal structure eliminates BOM cost and PCB area while ensuring fast rise times under capacitive loads - a key feature of the MAX6314US26D3-T design.
What is the minimum pulse width required on the MR pin to assert reset in the MAX6314US26D3-T?
The MAX6314US26D3-T requires a minimum MR input pulse width of 1µs to reliably assert reset. This specification is verified across temperature and supply voltage ranges, allowing robust manual reset triggering even with fast-switching logic or mechanical pushbuttons. The MAX6314US26D3-T also includes internal glitch rejection and an integrated 63kΩ pullup resistor, so MR can be left floating if unused - a key reliability feature of the MAX6314US26D3-T.
How does the MAX6314US26D3-T handle VCC transients, and what is its immunity specification?
The MAX6314US26D3-T is immune to short-duration negative-going VCC transients up to 100µs when the overdrive (VTH – VCC) is 100mV, as characterized in the Typical Operating Characteristics. This transient immunity prevents false resets caused by switching noise or ESD events. The MAX6314US26D3-T achieves this through internal filtering and comparator hysteresis, making it suitable for electrically noisy environments such as automotive or industrial control systems.
What package type and dimensions does the MAX6314US26D3-T use?
The MAX6314US26D3-T uses the SOT143 package: a 4-pin, surface-mount plastic package measuring 1.3mm × 2.9mm with 0.95mm maximum height and 0.95mm pin pitch. It is rated for operation from –40°C to +85°C and available in both leaded and lead-free versions (MAX6314US26D3+T). This compact footprint supports high-density PCB layouts typical in portable and embedded applications where the MAX6314US26D3-T is commonly deployed.
MAX6314US26D3-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:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6314US26D3-T FAQ
1.How can I place an order for MAX6314US26D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6314US26D3-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 MAX6314US26D3-T reliable?
The price and inventory of MAX6314US26D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6314US26D3-T is usually 5 days.
3.What payment methods are accepted for MAX6314US26D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6314US26D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6314US26D3-T?
MAX6314US26D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6314US26D3-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 MAX6314US26D3-T?
For technical support, including MAX6314US26D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6314US26D3-T requirements.
6.How does Aetrix verify that MAX6314US26D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6314US26D3-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 MAX6314US26D3-T meets industry standards.
7.What is the process for return or replacement of MAX6314US26D3-T?
All MAX6314US26D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6314US26D3-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 MAX6314US26D3-T part is unused and in its original packaging.
Return procedure for MAX6314US26D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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