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Analog Devices Inc./Maxim Integrated MAX6314US41D3
- Part No.:
- MAX6314US41D3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6314US41D3.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,095
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Product details
Overview
MAX6314US41D3 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 bidirectional reset I/Os (e.g., 68HC11). It features a factory-trimmed 4.10V reset threshold, 140ms 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 MAX6314US41D3 datasheet, MAX6314US41D3 pinout, MAX6314US41D3 application, or MAX6314US41D3 equivalent, key selection criteria include bidirectional RESET compatibility, precise 4.10V threshold tolerance, 140ms timeout timing, immunity to short VCC transients, and absence of external components for manual reset debouncing.
Technical Context
The MAX6314US41D3 implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider to set its 4.10V nominal reset threshold. Its RESET output combines an n-channel pulldown, a p-channel active pullup, and a 4.7kΩ passive pullup - enabling direct interface to bidirectional µP reset pins without external components.
Reset assertion occurs when VCC falls below 4.10V (±1.8% at +25°C, ±2.5% over -40°C to +85°C) or MR is pulled low; reset remains asserted for ≥140ms after VCC rises above threshold or MR deasserts. The device includes internal 63kΩ MR pullup and operates across 2.5V–5.5V VCC range with 5µA typical ICC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTH Nominal | 4.10V - Factory-trimmed threshold ensures accurate power-fail detection at system-defined rail level. |
| tRP Min | 140ms - Guarantees sufficient reset hold time for full µP initialization and state clearing. |
| Threshold Accuracy | ±1.8% at +25°C - Enables tight margining for 4.1V rails without calibration overhead. |
| Supply Current | 5µA - Supports ultra-low-power operation in battery-backed or energy-constrained systems. |
| VCC Range | 2.5V to 5.5V - Covers standard logic rails including 3.3V and 5V microcontroller domains. |
| MR Input Threshold | 0.3 × VCC (max) - Ensures robust low-level recognition even under varying VCC. |
| RESET Rise Time | 333ns (CL = 100pF) - Meets fast timing requirements of high-speed µPs like 68HC11 with multi-device reset buses. |
Pinout & Package
SOT143 (4-pin, surface-mount) package with 1.3mm × 2.9mm footprint and −40°C to +85°C operating temperature range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply voltage input and reset threshold monitor node | Internally connected to precision voltage divider; powers all circuitry and defines reset trigger point. |
| MR | Manual reset input | Active-low input with internal 63kΩ pullup; asserts reset when pulled ≤0.3×VCC; no external debounce required. |
| RESET | Bidirectional reset output | Combines n-channel pulldown, p-channel active pullup, and 4.7kΩ resistor - enables µP-driven reset acknowledgment and fast bus rise time. |
| GND | Ground reference | Return path for all internal current sources and comparator references; must be low-impedance for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional RESET output | Integrates 4.7kΩ pullup + p-channel active pullup to meet 68HC11-style reset handshaking without external components. |
| Factory-trimmed 4.10V threshold | Eliminates need for external resistor networks or calibration; supports precise 4.1V rail monitoring in industrial controllers. |
| 140ms reset timeout | Ensures µP completes boot sequence before release; avoids premature execution in systems with slow clock startup. |
| 5µA quiescent current | Enables use in always-on battery-powered instrumentation where standby current directly impacts service life. |
| Immunity to short VCC transients | Rejects glitches ≤100µs (at 4.10V threshold), preventing spurious resets during switching noise or load dump events. |
Applications
| Portable Medical Monitors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered ECG or glucose meter with cold-start requirement and strict power-rail supervision. IC Role / Device Role / Timing Role: Supervisory IC asserting reset until 4.10V rail stabilizes and holding reset ≥140ms to ensure ADC, display, and BLE subsystems initialize fully. Use Value: Prevents corrupted sensor readings or failed wireless pairing due to incomplete µP boot caused by marginal 4.1V LDO output. |
Use Scenario: DIN-rail mounted PLC module powered from 24VDC-to-3.3V isolated converter with transient-prone field wiring. IC Role / Device Role / Timing Role: Voltage supervisor detecting brownout on 3.3V logic rail and generating clean, glitch-immune reset pulse to ARM Cortex-M4 core. Use Value: Eliminates need for external RC network and Schmitt trigger, reducing BOM count while maintaining >100µs transient immunity per IEC 61000-4-4. |
| Automotive Body Control Units | Smart Energy Meters |
Use Scenario: Low-voltage wake-up circuit in BCM that must survive load-dump and cold-crank conditions. IC Role / Device Role / Timing Role: Monitoring 5V domain derived from vehicle battery; asserting reset during cranking dips below 4.10V and holding ≥140ms post-recovery. Use Value: Guarantees deterministic restart after engine start without firmware corruption, meeting ISO 16750-2 pulse 4a/b requirements. |
Use Scenario: Revenue-grade electricity meter with tamper-detection logic and real-time clock backed by supercapacitor. IC Role / Device Role / Timing Role: Providing power-fail interrupt and controlled reset to MSP430 µC when main 3.3V rail drops below 4.10V during capacitor discharge. Use Value: Enables safe EEPROM save and RTC freeze before VCC falls below 1.0V - preserving billing data integrity across power loss events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US41D3-T | Open-drain RESET output (no active pullup); identical 4.10V threshold and 140ms timeout. | Requires external 4.7kΩ pullup; unsuitable for bidirectional reset handshaking with 68HC11-family µPs. | Select when interfacing with µPs having unidirectional reset inputs or when board space allows discrete pullup. |
| TPS3808G33DBVR | Fixed 3.3V threshold; 200ms timeout; push-pull RESET; 1.4µA ICC; SOT-23-5 package. | Not pin-compatible; lacks MR input; optimized for 3.3V-only systems without manual reset capability. | Choose for ultra-low-power 3.3V applications where 4.10V threshold is not required and MR is unused. |
Compared with MAX6314US41D3, MAX6315US41D3-T requires external pullup and cannot support bidirectional reset protocols, while TPS3808G33DBVR offers lower current but sacrifices threshold flexibility, MR functionality, and 4.10V precision - making MAX6314US41D3 uniquely suited for 4.1V rail monitoring with 68HC11-compatible reset signaling.
Availability
MAX6314US41D3 is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC I/O modules, automotive body control units, and smart energy meters requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.
Supply support for MAX6314US41D3 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 highly accurate, low-power µP supervisory functions with factory-trimmed thresholds and integrated reset timing - targeting cost-sensitive, space-constrained embedded systems needing reliable power sequencing and fault recovery.
FAQ
What is the exact reset threshold voltage of the MAX6314US41D3?
The MAX6314US41D3 has a factory-trimmed nominal reset threshold of 4.10V, with ±1.8% accuracy at +25°C and ±2.5% over the full −40°C to +85°C operating temperature range. This value is laser-trimmed during production and specified in the Electrical Characteristics table under "Reset Threshold (Note 1)".
Does the MAX6314US41D3 require external components for manual reset functionality?
No, the MAX6314US41D3 does not require external components for manual reset. It includes an internal 63kΩ pullup resistor on the MR pin, allowing direct connection of a momentary switch to GND. The device also provides built-in debouncing, eliminating the need for external RC networks or Schmitt triggers.
How does the RESET output of the MAX6314US41D3 interface with bidirectional µP reset pins?
The MAX6314US41D3 RESET output integrates an n-channel pulldown, a p-channel active pullup, and a 4.7kΩ passive pullup - enabling true bidirectional handshake with µPs like the 68HC11. This architecture allows the µP to drive RESET low and detect external assertion, supporting source-differentiated reset vector selection without external circuitry.
What is the minimum reset timeout period for the MAX6314US41D3?
The MAX6314US41D3 has a minimum reset timeout period (tRP) of 140ms, as indicated by the "D3" suffix in the part number. This duration is internally programmed and guaranteed over temperature; typical values range from 140ms to 2240ms depending on process variation and temperature.
Is the MAX6314US41D3 compatible with 3.3V microcontrollers?
Yes, the MAX6314US41D3 operates with VCC from 2.5V to 5.5V and drives RESET compatible with 3.3V logic levels. Its RESET output is guaranteed to reach ≥0.8×VCC (2.64V at 3.3V) with CL = 100pF and rises in ≤333ns - meeting timing and voltage requirements of modern 3.3V µPs, provided the 4.10V threshold aligns with system rail supervision needs.
MAX6314US41D3 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:
- 4.1V
- 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
MAX6314US41D3 FAQ
1.How can I place an order for MAX6314US41D3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6314US41D3 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 MAX6314US41D3 reliable?
The price and inventory of MAX6314US41D3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6314US41D3 is usually 5 days.
3.What payment methods are accepted for MAX6314US41D3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6314US41D3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6314US41D3?
MAX6314US41D3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6314US41D3 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 MAX6314US41D3?
For technical support, including MAX6314US41D3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6314US41D3 requirements.
6.How does Aetrix verify that MAX6314US41D3 is sourced from the original manufacturer or authorized distributors?
All MAX6314US41D3 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 MAX6314US41D3 meets industry standards.
7.What is the process for return or replacement of MAX6314US41D3?
All MAX6314US41D3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6314US41D3, 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 MAX6314US41D3 part is unused and in its original packaging.
Return procedure for MAX6314US41D3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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