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Analog Devices Inc./Maxim Integrated MAX6414UK175+
- Part No.:
- MAX6414UK175+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6414UK175+.pdf
- Description:
- MAX6414 LOW-POWER, SINGLE-VOLTAG
- Quantity:
- Payment:
- Shipping:
Inventory:649
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Product details
Overview
MAX6414UK175+ from Maxim Integrated is a low-power, single-voltage microprocessor reset supervisor IC with factory-trimmed 1.75V VCC reset threshold, active-low open-drain RESET output, manual reset input (MR), and capacitor-adjustable reset timeout delay. It monitors supply voltage in battery-powered controllers and embedded systems, asserting reset during brownout or power-up until the external SRT capacitor discharges fully.
For engineers reviewing the MAX6414UK175+ datasheet, MAX6414UK175+ pinout, MAX6414UK175+ application, or MAX6414UK175+ equivalent, this page delivers verified electrical parameters, SOT23-5 package mapping, reset timeout calculation guidance, and real-world dual-supply interface use cases - all confirmed against Maxim's official MAX6412–MAX6420 datasheet Rev 5 (8/2012).
Technical Context
The MAX6414UK175+ implements a precision bandgap-based VCC monitor with ±2.5% threshold accuracy over –40°C to +125°C and guarantees valid RESET assertion down to VCC = 1V. Its internal 240nA current source charges an external capacitor on the SRT pin to generate a programmable timeout period ranging from 275µs (CSRT = 0) up to milliseconds (e.g., 4.375ms at CSRT = 1500pF).
It features a high-impedance MR input with 20kΩ internal pullup, enabling momentary switch reset without external components, and an open-drain RESET output rated for 6.0V max sink voltage - allowing direct interfacing with 3.3V or 5V µP reset inputs via external pullup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 1.75V nominal (suffix "175"), ±2.5% over full temperature range - sets precise brownout detection point for 1.8V logic rails |
| Reset Timeout Range | 275µs minimum (SRT unconnected); scalable to >4ms using external capacitor - enables alignment with µP power-on reset timing requirements |
| Supply Current | 1.7µA typical at +25°C - supports multi-year battery life in portable medical or sensor nodes |
| RESET Output Type | Active-low open-drain - allows wired-OR configuration and level-shifting across mixed-voltage systems (e.g., 3.3V µP with 5V pullup) |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial control environments |
| Package | SOT23-5 - 2.9mm × 1.6mm footprint compatible with high-density PCB layouts and automated assembly |
| MR Input Behavior | Logic-low assertion with 1µs minimum pulse width and 75ns glitch rejection - tolerates noisy switch bounce without spurious resets |
Pinout & Package
SOT23-5 package: 2.9mm × 1.6mm × 1.1mm body, gull-wing leads, RoHS-compliant lead-free finish ("+" suffix). Thermal pad not present; standard reflow profile applies.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low open-drain reset output | Drives µP reset input low; requires external pullup resistor (e.g., 10kΩ to VCC or alternate rail) |
| 2 - GND | Ground reference | Return path for internal comparators and current source; must connect to low-impedance system ground plane |
| 3 - MR | Manual reset input | Pulled high internally (20kΩ); assert reset by grounding - no external debounce needed for long timeout periods |
| 4 - SRT | Set reset timeout input | Connects to external timing capacitor (low-leakage ceramic recommended); 240nA ramp current defines tRP = 2.71×10⁶·CSRT + 275µs |
| 5 - VCC | Supply voltage and monitored rail | Power source and primary voltage monitor input; operates from 1.0V to 5.5V; reset asserted if VCC < 1.75V |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-adjustable reset timeout | Enables precise timing alignment with diverse µP power-on sequences without firmware changes or BOM variants |
| Guaranteed RESET validity down to VCC = 1V | Ensures deterministic reset behavior during deep brownout - critical for fail-safe operation in automotive ECUs |
| 20kΩ internal MR pullup | Eliminates need for external pullup resistor when manual reset is unused - reduces component count and board area |
| Open-drain RESET with 6.0V tolerance | Permits direct connection to higher-voltage logic domains (e.g., 5V pullup driving 3.3V µP) without level translators |
| Power-supply transient immunity | Rejects VCC glitches ≤50µs duration when undershoot is ≤100mV below threshold - improves robustness in noisy power environments |
Applications
| Automotive Body Control Module | Portable Medical Glucose Monitor |
|---|---|
Use Scenario: Monitors 1.8V microcontroller supply in door module exposed to load-dump transients and cold-cranking voltage sags. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset during VCC drop below 1.75V; timeout set to 5ms to exceed µP internal POR delay. Use Value: Prevents erratic MCU execution during 6V–16V battery fluctuations; open-drain output interfaces cleanly with 5V CAN transceiver reset line. |
Use Scenario: Ensures reliable startup of ARM Cortex-M0 in handheld diagnostic device powered by single-cell Li-ion (2.8V–4.2V). IC Role / Device Role / Timing Role: Primary reset generator triggered by VCC crossing 1.75V during charge-cycle wake-up; MR pin used for user-initiated calibration reset. Use Value: 1.7µA quiescent current extends battery life beyond 2 years; SOT23-5 footprint fits compact 30mm × 30mm PCB. |
| Industrial PLC I/O Expansion Card | Smart Energy Meter MCU Subsystem |
Use Scenario: Supervises isolated 3.3V domain powering FPGA configuration logic in DIN-rail mounted controller. IC Role / Device Role / Timing Role: Dual-role supervisor: VCC monitor for local 3.3V rail and manual reset initiator for field-service recovery. Use Value: MR's 75ns glitch rejection prevents false resets from relay coil back-EMF; -40°C to +125°C rating ensures operation inside sealed enclosures. |
Use Scenario: Provides fail-safe reset coordination between metrology ASIC and host MCU during AC mains interruption and backup capacitor discharge. IC Role / Device Role / Timing Role: Generates synchronized reset pulse after VCC decays below 1.75V; timeout extended to 10ms using 3300pF SRT capacitor to cover full hold-up time. Use Value: Open-drain RESET allows shared reset bus across 3.3V metrology and 1.8V communication ICs; guaranteed operation at 1V supports graceful shutdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6414UK180+ | Factory-set 1.80V reset threshold (±2.5%), identical pinout, timing, and features | Used where tighter margin above 1.8V rail is required (e.g., 1.8V ±5% systems) | Select when system VCC nominal is 1.8V and 50mV higher threshold improves noise margin vs. 1.75V version |
| TPS3808G17DBVR | Fixed 1.74V threshold, push-pull active-low RESET, 1.1µA IQ, same SOT23-5 package | Lacks manual reset input and capacitor-adjustable timeout; timeout fixed at 200ms | Choose for ultra-low-power applications where fixed long timeout suffices and MR is unnecessary |
Compared with MAX6414UK175+, the MAX6414UK180+ offers a slightly higher reset threshold for improved noise immunity on 1.8V rails, while the TPS3808G17DBVR trades adjustable timeout and MR capability for lower quiescent current and simpler implementation where fixed timing is acceptable.
Availability
MAX6414UK175+ is available at Aetrix Electronics and suitable for automotive body control modules, portable medical diagnostics, industrial PLC I/O cards, and smart energy meter subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6414UK175+ 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 demanding industrial, automotive, and medical applications, emphasizing reliability, low power, and high integration.
The MAX6412–MAX6420 family was engineered specifically for robust, low-quiescent-current microprocessor supervision in space-constrained, battery-sensitive, and thermally harsh environments - delivering configurable reset timing without sacrificing accuracy or temperature stability.
FAQ
What is the exact reset threshold voltage of MAX6414UK175+ and how is it trimmed?
The MAX6414UK175+ has a factory-laser-trimmed VCC reset threshold of 1.75V nominal, with ±2.5% tolerance over –40°C to +125°C. This value is confirmed in Table 1 of the MAX6412–MAX6420 datasheet (Rev 5), where suffix "175" maps to min/typ/max values of 1.713V/1.75V/1.788V. The trimming uses on-chip laser-fused resistors to achieve tight accuracy without external components.
How do I calculate the reset timeout period for MAX6414UK175+ using the SRT capacitor?
For MAX6414UK175+, the reset timeout period tRP (in seconds) is calculated as tRP = (2.71 × 10⁶) × CSRT + 275µs, where CSRT is the capacitor value in farads. For example, a 1500pF capacitor yields tRP ≈ 4.375ms. This formula is specified in the Pin Description section and validated in Typical Operating Characteristic Figure 3 of the datasheet.
Can MAX6414UK175+ monitor voltages other than VCC, such as a 3.3V auxiliary rail?
No - MAX6414UK175+ is a single-threshold, fixed-VCC monitor only. It lacks the RESET IN pin required for adjustable monitoring (found only in MAX6415–MAX6420 variants). To supervise a 3.3V rail, use MAX6418UK330+ (dual-monitor) or MAX6415UK-T (adjustable-only); MAX6414UK175+ monitors only its own VCC pin.
What is the maximum allowable voltage on the RESET pin of MAX6414UK175+?
The RESET pin of MAX6414UK175+ is open-drain and rated for up to +6.0V, as stated in the Absolute Maximum Ratings table. This allows safe interfacing with 5V pullup resistors even when VCC is 1.8V or 3.3V - a key design advantage for mixed-voltage systems. Exceeding 6.0V risks permanent damage.
Does MAX6414UK175+ include built-in hysteresis, and what is its value?
Yes, MAX6414UK175+ includes internal hysteresis of 4 × VTH mV (e.g., ~7mV at 1.75V threshold), as specified in the Electrical Characteristics table under "Hysteresis". This prevents oscillation during slow VCC ramps near the threshold and is implemented via internal feedback - no external components required.
MAX6414UK175+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- -
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.665V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 3ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6414UK175+ FAQ
1.How can I place an order for MAX6414UK175+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6414UK175+ 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 MAX6414UK175+ reliable?
The price and inventory of MAX6414UK175+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6414UK175+ is usually 5 days.
3.What payment methods are accepted for MAX6414UK175+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6414UK175+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6414UK175+?
MAX6414UK175+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6414UK175+ 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 MAX6414UK175+?
For technical support, including MAX6414UK175+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6414UK175+ requirements.
6.How does Aetrix verify that MAX6414UK175+ is sourced from the original manufacturer or authorized distributors?
All MAX6414UK175+ 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 MAX6414UK175+ meets industry standards.
7.What is the process for return or replacement of MAX6414UK175+?
All MAX6414UK175+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6414UK175+, 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 MAX6414UK175+ part is unused and in its original packaging.
Return procedure for MAX6414UK175+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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