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Analog Devices Inc./Maxim Integrated MAX6412UK16+T
- Part No.:
- MAX6412UK16+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6412UK16+T.pdf
- Description:
- IC RESET MPU LOW PWR SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,465
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Product details
Overview
The MAX6412UK16+T from Maxim Integrated is a low-power microprocessor supervisor IC with fixed 1.575V VCC reset threshold, manual reset input (MR), and active-low push-pull reset output. It monitors supply voltage in battery-powered controllers and embedded systems, asserts reset during brownout or power-up, and guarantees valid reset down to VCC = 1V. Reset timeout is capacitor-adjustable (275µs to >5ms) for flexible μP initialization timing.
For engineers reviewing the MAX6412UK16+T datasheet, MAX6412UK16+T pinout, MAX6412UK16+T application, or MAX6412UK16+T equivalent, key selection criteria include its 1.575V fixed threshold accuracy (±2.5% over -40°C to +125°C), 1.7µA typical quiescent current at 2V, SOT23-5 package compatibility, and guaranteed reset validity at VCC ≥ 1V - critical for low-voltage portable and automotive subsystems.
Technical Context
The MAX6412UK16+T implements a precision bandgap-based voltage comparator for VCC monitoring and a dedicated MR input with internal 20kΩ pullup. Its reset timeout is generated by a 240nA current source charging an external capacitor on the SRT pin, referenced to a stable 0.65V internal threshold.
Reset assertion occurs when VCC falls below 1.575V (±2.5%) or MR is pulled low; deassertion requires both VCC > 1.575V and MR high for the full timeout period. The active-low push-pull RESET output drives logic-compatible loads up to 3.2mA sink at VCC ≥ 4.5V with VOL ≤ 0.4V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 1.575V ±2.5% over -40°C to +125°C - ensures reliable brownout detection across automotive/industrial temperature range |
| Quiescent Current | 1.7µA typ at VCC ≤ 2.0V - enables multi-year operation in coin-cell–powered IoT sensors |
| Reset Timeout Range | 275µs to >5ms via 0–1500pF SRT capacitor - supports μP reset hold times from fast boot to complex firmware initialization |
| RESET Output Type | Active-low push-pull - eliminates need for external pullup resistor and ensures fast, rail-to-rail logic transitions |
| Operating Temp Range | -40°C to +125°C - qualified for under-hood automotive and industrial control applications |
| VCC Validity Limit | RESET guaranteed valid down to VCC = 1V - prevents undefined state during deep brownout recovery |
| MR Input Logic | VIH = 0.7×VCC, VIL = 0.3×VCC - compatible with 1.8V/3.3V/5V logic families without level-shifting |
Pinout & Package
SOT23-5 package (5-pin, 2.9mm × 1.6mm × 1.1mm), RoHS-compliant, thermal resistance θJA = 255.9°C/W (multi-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Drives μP reset pin directly; sinks 3.2mA at VCC ≥ 4.5V with VOL ≤ 0.4V; no external pullup required |
| 2 - GND | Ground reference | Common return path for all internal circuitry and external capacitor (SRT) |
| 3 - MR | Manual reset input | Active-low; internal 20kΩ pullup allows direct switch-to-ground connection; 1µs minimum pulse width |
| 4 - SRT | Set reset timeout input | Connects to external capacitor (CSRT); 240nA precision current source sets timeout via ramp-to-0.65V timing |
| 5 - VCC | Supply voltage input | Accepts 1.0V to 5.5V; powers internal comparators, reset logic, and output driver |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-adjustable reset timeout | Enables precise tailoring of reset hold time (275µs–5.75ms) without firmware changes or BOM revisions |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic μP behavior during deep undervoltage recovery, eliminating race conditions in low-power wake-up sequences |
| Power-supply transient immunity | Rejects VCC glitches ≤50µs duration when 100mV below threshold - prevents spurious resets in noisy automotive environments |
| Low-leakage SRT node design | Minimizes timeout drift from PCB leakage; supports ceramic capacitors with <10nA leakage for stable long-term timing |
| AEC-Q100 qualification option | Available as /V variant for automotive applications requiring stress-tested reliability and extended temperature validation |
Applications
| Automotive Body Control Module | Portable Medical Sensor Hub |
|---|---|
Use Scenario: Monitors 3.3V microcontroller supply in door module electronics exposed to load-dump transients and cold-crank voltage sag. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset during VCC drop below 1.575V; timeout set to 4.375ms to cover worst-case brownout recovery. Use Value: Prevents erratic MCU execution during 6V–16V battery fluctuations; push-pull output ensures immediate reset release without pullup delay. | Use Scenario: Supervises 1.8V SoC supply in handheld glucose meter powered by single AAA cell, operating from 0.9V to 1.5V battery range. IC Role / Device Role / Timing Role: Primary VCC monitor with 1.575V threshold; leverages ultra-low 1.7µA ICC to extend battery life beyond 2 years. Use Value: Guarantees valid reset down to VCC = 1V - critical for safe shutdown before battery depletion causes data corruption. |
| Industrial PLC I/O Subsystem | Smart Energy Meter Controller |
Use Scenario: Ensures clean startup of ARM Cortex-M4 controller after AC/DC converter power-up with variable rise time. IC Role / Device Role / Timing Role: Supervisor with manual reset (MR) for field-service firmware reload; SRT capacitor set for 3ms timeout matching μP boot ROM requirements. Use Value: Internal MR pullup eliminates external components; glitch rejection prevents false resets from switching noise on shared 24V bus. | Use Scenario: Monitors dual rails (3.3V MCU and 5.0V metrology ADC) in ANSI C12.22–compliant electricity meter with tamper detection. IC Role / Device Role / Timing Role: Used in conjunction with MAX6418UK16+T for dual-voltage supervision; MAX6412UK16+T handles primary 3.3V domain with fixed threshold. Use Value: Fixed 1.575V threshold provides tighter tolerance than adjustable solutions - improves accuracy of undervoltage lockout during grid instability events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6316LUK16+T | Fixed 1.575V threshold, but uses internal timer (no SRT capacitor); 2.5µA ICC; only 1.25ms min timeout | Lacks adjustable timeout - unsuitable where μP boot sequence varies across firmware versions | Select when fixed, short-duration reset hold is sufficient and board space for SRT capacitor must be minimized |
| TPS3808G16DBVR | 1.6V threshold (±0.5%), 1.1µA ICC, fixed 200ms timeout, open-drain output | Higher threshold tolerance and lower ICC, but open-drain requires pullup and fixed timeout limits flexibility | Select for ultra-low-power applications needing tighter threshold accuracy, accepting trade-off of non-adjustable timing and external pullup |
Compared with MAX6316LUK16+T and TPS3808G16DBVR, the MAX6412UK16+T uniquely balances ultra-low ICC (1.7µA), capacitor-adjustable timeout (275µs–5.75ms), and push-pull output - making it optimal for space-constrained, battery-sensitive designs requiring precise reset timing control without external components.
Availability
MAX6412UK16+T is available at Aetrix Electronics and suitable for automotive body control modules, portable medical sensor hubs, and industrial PLC I/O subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6412UK16+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 low power, high reliability, and AEC-Q100 qualification.
The MAX6412UK16+T belongs to the MAX6412–MAX6420 family of capacitor-programmable μP supervisors, engineered specifically for robust voltage monitoring in battery-powered and harsh-environment systems where deterministic reset timing and low ICC are critical.
FAQ
What is the exact reset threshold voltage of the MAX6412UK16+T and how tightly is it specified?
The MAX6412UK16+T has a factory-trimmed VCC reset threshold of 1.575V, with ±1.25% accuracy at +25°C and ±2.5% over the full -40°C to +125°C operating range. This specification is confirmed in the Electrical Characteristics table (page 3 of the datasheet) and corresponds to the "16" suffix in the part number per Table 1. The threshold is laser-trimmed using internal resistors for high stability without external calibration.
Does the MAX6412UK16+T support dual-voltage monitoring like some members of the MAX6412–MAX6420 family?
No, the MAX6412UK16+T does not support dual-voltage monitoring. It is a single-threshold device with only VCC monitoring and a manual reset input (MR). Dual-voltage capability is exclusive to the MAX6418/MAX6419/MAX6420 variants, which include both a fixed VCC threshold and an adjustable RESET IN input. The MAX6412UK16+T datasheet explicitly lists "-" under RESET IN in the Selector Guide (page 11).
Can the MAX6412UK16+T operate reliably at VCC = 1.2V, and what happens to the RESET output below 1V?
Yes, the MAX6412UK16+T operates reliably at VCC = 1.2V: its supply voltage range is 1.0V to 5.5V, and RESET is guaranteed valid (logic-low when asserted, logic-high when deasserted) for VCC ≥ 1V. Below 1V, RESET output drive strength collapses; for applications requiring valid logic down to 0V, a 100kΩ pulldown resistor on RESET is recommended per Figure 6 in the datasheet.
What capacitor value should I use on the SRT pin of the MAX6412UK16+T to achieve a 4.375ms reset timeout?
To achieve a 4.375ms reset timeout, connect a 1500pF capacitor between the SRT pin and GND. This value is explicitly listed in the Electrical Characteristics table (page 3) under "Reset Timeout Period tRP" for CSRT = 1500pF. The relationship is linear: tRP = (2.71 × 10⁶) × CSRT + 275µs, so 1500pF yields 4.375ms typical at +25°C.
Is the MAX6412UK16+T pin-compatible with other SOT23-5 supervisors such as the MAX6326 or TPS3808 series?
No, the MAX6412UK16+T is not pin-compatible with MAX6326 or TPS3808 series devices. Its pinout (RESET, GND, MR, SRT, VCC) differs functionally: MAX6326 uses different pin assignments (e.g., SRT is not present), and TPS3808DBVR maps GND, VIN, EN, RESET, and VDD differently. Always verify pin functions against the MAX6412UK16+T Pin Description (page 5) - substituting parts without layout review risks functional failure.
MAX6412UK16+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.575V
- Output:
- Push-Pull, Totem Pole
- 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
MAX6412UK16+T FAQ
1.How can I place an order for MAX6412UK16+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6412UK16+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 MAX6412UK16+T reliable?
The price and inventory of MAX6412UK16+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6412UK16+T is usually 5 days.
3.What payment methods are accepted for MAX6412UK16+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6412UK16+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6412UK16+T?
MAX6412UK16+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6412UK16+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 MAX6412UK16+T?
For technical support, including MAX6412UK16+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6412UK16+T requirements.
6.How does Aetrix verify that MAX6412UK16+T is sourced from the original manufacturer or authorized distributors?
All MAX6412UK16+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 MAX6412UK16+T meets industry standards.
7.What is the process for return or replacement of MAX6412UK16+T?
All MAX6412UK16+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6412UK16+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 MAX6412UK16+T part is unused and in its original packaging.
Return procedure for MAX6412UK16+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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