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Analog Devices Inc./Maxim Integrated MAX6414UK46-T
- Part No.:
- MAX6414UK46-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6414UK46-T.pdf
- Description:
- MAX6414 LOW-POWER, SINGLE-VOLTAG
- Quantity:
- Payment:
- Shipping:
Inventory:830
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Product details
Overview
MAX6414UK46-T from Maxim Integrated is a low-power microprocessor supervisor IC with fixed 4.625V VCC reset threshold, active-low open-drain reset output, manual reset input (MR), and capacitor-adjustable reset timeout. It monitors VCC supply voltage in systems requiring precise brownout detection and reliable power-on reset for embedded controllers operating from -40°C to +125°C.
For engineers reviewing the MAX6414UK46-T datasheet, MAX6414UK46-T pinout, MAX6414UK46-T application, or MAX6414UK46-T equivalent, this page delivers verified technical context, exact pin functions, real-world timing behavior, thermal stability data, and validated alternative options for automotive-grade voltage monitoring designs.
Technical Context
The MAX6414UK46-T 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 SRT pin hosts a 240nA current source that charges an external capacitor to generate a programmable timeout period ranging from 275µs to 5.75ms.
Reset assertion occurs when VCC falls below 4.625V (±2.5%) or MR is pulled low; deassertion requires both VCC > 4.625V and MR high for the full timeout interval. The open-drain RESET output supports logic-level translation up to 5.5V and interfaces directly with µP reset inputs requiring active-low, high-impedance-compatible signaling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 4.625V nominal, ±2.5% over full temperature range - ensures consistent brownout detection across automotive and industrial environments |
| Supply Current | 1.7µA typical at VCC ≤ 2.0V - enables multi-year battery operation in portable and remote sensor nodes |
| Reset Timeout Range | 275µs to 5.75ms (CSRT = 0F to 1500pF) - supports µP reset hold times from fast-boot MCUs to legacy processors with long initialization sequences |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive, industrial control, and medical equipment applications |
| RESET Output Type | Active-low open-drain - allows wired-OR configuration, level-shifting to 3.3V/5V µP inputs, and pull-up to separate supply rail |
| MR Input Logic | CMOS-compatible with internal 20kΩ pullup - eliminates external components for manual reset implementation |
| Reset Propagation Delay | 100µs max on VCC fall - provides deterministic response to rapid supply collapse without false triggering |
Pinout & Package
SOT23-5 package: ultra-compact 2.9mm × 1.6mm footprint with 0.95mm pitch, optimized for space-constrained PCB layouts in automotive modules and portable instrumentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low open-drain reset output | Drives µP reset input low during fault conditions; requires external pullup for logic-high state; supports voltage translation up to 5.5V |
| 2 - GND | Ground reference | Primary return path for internal comparators and current source; must be low-impedance connection to minimize noise coupling into SRT |
| 3 - MR | Manual reset input | Active-low logic input with internal 20kΩ pullup; asserts reset when pulled to GND; 1µs minimum pulse width required |
| 4 - SRT | Set reset timeout input | 240nA constant-current source pin; connects to external capacitor to set timeout; sensitive to stray capacitance and leakage - keep trace short and isolated |
| 5 - VCC | Supply voltage and monitored rail | Input for fixed-threshold VCC supervision (4.625V); powers internal circuitry; valid operation from 1.0V to 5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-adjustable reset timeout | Enables precise tuning of reset hold time (275µs–5.75ms) without firmware changes or BOM revisions |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic reset behavior during deep brownout, critical for fail-safe shutdown in automotive ECUs |
| Power-supply transient immunity | Rejects VCC glitches ≤50µs at 100mV overdrive - prevents spurious resets from switching noise or load transients |
| AEC-Q100 qualified variants available | Supports automotive qualification path via /V suffix parts - MAX6414UK46/V+T meets stress test requirements for Grade 1 (-40°C to +125°C) |
| Low quiescent current (1.7µA typ) | Minimizes battery drain in always-on monitoring circuits - extends shelf life and operational runtime in energy-harvested systems |
Applications
| Automotive Engine Control Unit (ECU) | Portable Medical Infusion Pump |
|---|---|
Use Scenario: Monitors 5V system rail in engine management module exposed to wide temperature swings and load dump transients. IC Role / Device Role / Timing Role: Provides fail-safe power-on reset and brownout protection with 4.625V threshold aligned to MCU VDD tolerance. Use Value: Prevents code execution errors during cold cranking (VCC dip to 4.2V) and ensures deterministic restart after battery recovery. |
Use Scenario: Supervises main 3.3V supply in battery-powered infusion pump with strict safety-critical boot validation. IC Role / Device Role / Timing Role: Generates 4.375ms reset pulse (CSRT = 1500pF) to meet ARM Cortex-M4 bootloader timing requirements. Use Value: Guarantees µP enters known state before motor driver initialization, eliminating risk of uncontrolled fluid delivery. |
| Industrial PLC I/O Module | Smart Energy Meter |
Use Scenario: Embedded in DIN-rail mounted controller subjected to 85°C ambient and ESD events per IEC 61000-4-2. IC Role / Device Role / Timing Role: Active-low open-drain RESET interfaces to isolated µP reset input via optocoupler, enabling ground-isolated reset signaling. Use Value: Maintains functional safety integrity by preventing reset signal corruption across isolation barrier during surge events. |
Use Scenario: Monitors backup coin-cell supply (1.8V) and main 3.3V rail in revenue-grade meter with 10-year battery life target. IC Role / Device Role / Timing Role: Uses MR pin for tamper-detection reset initiation; SRT capacitor sets 275µs timeout for rapid fault recovery. Use Value: Enables immediate secure shutdown on cover removal while minimizing quiescent current draw (<2µA) during sleep mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6414UK46/V+T | AEC-Q100 Grade 1 qualified; identical electrical specs and pinout; lead-free SOT23-5 package | Required for automotive production programs needing PPAP documentation and extended reliability testing | Select when automotive qualification, traceable sourcing, and zero-defect manufacturing are mandatory |
| TPS3808G33DBVR | Fixed 3.3V threshold; push-pull active-low RESET; 35µA ICC; 200ms min timeout (non-adjustable) | Lacks capacitor-adjustable timeout and manual reset; suited for simpler, cost-sensitive applications without fine-grained timing control | Choose only if 3.3V monitoring suffices and fixed timeout is acceptable - not drop-in compatible due to different threshold and no MR pin |
Compared with MAX6414UK46-T, the /V+T variant adds automotive qualification without altering functionality, while TPS3808G33DBVR offers lower cost but sacrifices adjustable timeout, manual reset, and 4.625V precision - making it unsuitable for brownout-sensitive 5V systems.
Availability
MAX6414UK46-T is available at Aetrix Electronics and suitable for automotive engine control units, portable medical devices, industrial PLC modules, and smart energy meters requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX6414UK46-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 demanding industrial, automotive, and medical applications, emphasizing reliability, low power, and high integration.
The MAX6412–MAX6420 family was engineered specifically for microprocessor reset supervision in harsh environments, delivering capacitor-programmable timing, wide-temperature operation, and multiple reset output configurations to replace discrete reset solutions.
FAQ
What is the exact reset threshold voltage of MAX6414UK46-T?
The MAX6414UK46-T has a factory-trimmed VCC reset threshold of 4.625V (nominal), with ±2.5% accuracy over the full -40°C to +125°C operating range. This value is confirmed in Table 1 of the datasheet (suffix "46" corresponds to 4.509V min / 4.625V typ / 4.741V max), and applies exclusively to the VCC supply monitoring function of the MAX6414UK46-T.
Does MAX6414UK46-T support dual-voltage monitoring?
No, the MAX6414UK46-T does not support dual-voltage monitoring. It is a single-threshold supervisor with fixed 4.625V VCC monitoring and no RESET IN pin. Dual-voltage capability is exclusive to MAX6418/MAX6419/MAX6420 variants, which include both fixed and adjustable inputs - a feature absent in the MAX6414UK46-T design.
Can MAX6414UK46-T operate with VCC below 1.6V?
Yes, the MAX6414UK46-T operates with VCC as low as 1.0V and guarantees valid reset output down to that level. Its datasheet specifies supply voltage range as 1.0V to 5.5V, and the "Guaranteed Reset Valid to VCC = 1V" feature ensures predictable behavior during deep brownout - a key specification confirmed for the MAX6414UK46-T across all temperature grades.
What is the maximum recommended capacitor value for SRT on MAX6414UK46-T?
The datasheet specifies CSRT = 1500pF as the maximum tested value yielding 5.75ms timeout (typ). While larger capacitors extend timeout linearly, leakage current becomes critical above ~2nF; ceramic capacitors with <10nA leakage are mandatory. For MAX6414UK46-T, use 1500pF or less unless validated per layout guidelines - exceeding this risks timeout inaccuracy due to parasitic effects.
Is MAX6414UK46-T pin-compatible with other MAX641x devices?
Yes, all MAX6412–MAX6420 devices, including MAX6414UK46-T, share identical SOT23-5 pinout and package dimensions. Pin 1 (RESET), Pin 2 (GND), Pin 3 (MR), Pin 4 (SRT), and Pin 5 (VCC) retain consistent function across the family - enabling direct substitution where threshold, output type, and feature set align, as confirmed in the Pin Description table for MAX6414UK46-T.
MAX6414UK46-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.625V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6414UK46-T FAQ
1.How can I place an order for MAX6414UK46-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6414UK46-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 MAX6414UK46-T reliable?
The price and inventory of MAX6414UK46-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6414UK46-T is usually 5 days.
3.What payment methods are accepted for MAX6414UK46-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6414UK46-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6414UK46-T?
MAX6414UK46-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6414UK46-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 MAX6414UK46-T?
For technical support, including MAX6414UK46-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6414UK46-T requirements.
6.How does Aetrix verify that MAX6414UK46-T is sourced from the original manufacturer or authorized distributors?
All MAX6414UK46-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 MAX6414UK46-T meets industry standards.
7.What is the process for return or replacement of MAX6414UK46-T?
All MAX6414UK46-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6414UK46-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 MAX6414UK46-T part is unused and in its original packaging.
Return procedure for MAX6414UK46-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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