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Analog Devices Inc./Maxim Integrated MAX6412UK22+T
- Part No.:
- MAX6412UK22+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6412UK22+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:8,375
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Product details
Overview
The MAX6412UK22+T from Maxim Integrated is a low-power microprocessor supervisor IC with fixed 2.188V 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 (2.75ms typical with 1500pF).
For engineers reviewing the MAX6412UK22+T datasheet, MAX6412UK22+T pinout, MAX6412UK22+T application, or MAX6412UK22+T equivalent, key selection criteria include fixed 2.188V threshold accuracy (±2.5% over -40°C to +125°C), 1.7µA typical quiescent current at 2V, SOT23-5 package compatibility, and MR pulse rejection (75ns glitch immunity).
Technical Context
The MAX6412UK22+T implements a precision bandgap-based voltage comparator for VCC monitoring and a dedicated manual reset 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 0.65V internal threshold.
It features guaranteed reset assertion validity down to VCC = 1V, power-supply transient immunity (e.g., 50µs rejection for 100mV VCC overdrive), and operates across -40°C to +125°C with AEC-Q100 qualification available in /V variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.188V nominal, ±2.5% tolerance over full temperature range - ensures reliable brownout detection at defined supply level |
| Quiescent Current | 1.7µA typical at VCC ≤ 2.0V - enables multi-year operation in coin-cell–powered devices |
| Reset Timeout Period | 4.375ms typical with 1500pF capacitor - provides sufficient hold time for μP initialization sequences |
| MR Glitch Rejection | 75ns minimum - prevents spurious resets from board-level noise or switch bounce |
| Operating Temperature | -40°C to +125°C - supports automotive under-hood and industrial control environments |
| Supply Voltage Range | 1.0V to 5.5V - allows use with Li-ion, LiFePO₄, and 3.3V/5V logic rails |
| Reset Output Type | Active-low, push-pull - drives standard CMOS μP reset inputs without external pullup |
Pinout & Package
SOT23-5 package (U5+2A outline), 5-pin surface-mount, RoHS-compliant lead-free (+T suffix), 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 500µA at VCC ≥ 1.8V with VOL ≤ 0.3V |
| 2 - GND | Ground reference | Common return for all internal circuitry and external capacitor (SRT) |
| 3 - MR | Manual reset input | Logic-low active; internal 20kΩ pullup enables NC default; 1µs minimum pulse width |
| 4 - SRT | Set reset timeout input | Connects to external timing capacitor; 240nA constant current source sets tRP |
| 5 - VCC | Supply voltage input | Powers device and serves as monitored rail; valid reset asserted down to 1.0V |
Key Features
| Feature | Design Value |
|---|---|
| Fixed factory-trimmed VCC threshold | 2.188V with ±2.5% accuracy over -40°C to +125°C - eliminates external resistor network calibration |
| Capacitor-adjustable reset timeout | Configurable from ~275µs to >10ms using 0–10nF ceramic capacitor - supports diverse μP boot requirements |
| Guaranteed reset validity to VCC = 1V | RESET remains functional even during deep brownout - prevents undefined μP state during low-voltage recovery |
| Low quiescent current | 1.7µA typical at 2V - extends battery life in portable medical and sensor nodes |
| Power-supply transient immunity | Rejects 50µs transients 100mV below threshold - improves robustness in noisy automotive or industrial power domains |
Applications
| Battery-Powered Controllers | Automotive Body Control Modules |
|---|---|
Use Scenario: Monitoring 3.3V supply in a wireless sensor node powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Supervisor asserts reset if VCC drops below 2.188V during cold start or battery depletion. Use Value: Prevents firmware execution errors during marginal supply conditions; 1.7µA ICC enables >5-year shelf life. | Use Scenario: Reset management for infotainment MCU in door module exposed to load-dump transients. IC Role / Device Role / Timing Role: Detects VCC sag during ignition cycling and asserts 4.375ms reset pulse after recovery. Use Value: 75ns MR glitch rejection and transient immunity ensure no false resets during EMI-rich vehicle environment. |
| Medical Diagnostic Handhelds | Industrial PLC I/O Subsystems |
Use Scenario: Ensuring deterministic startup of ARM Cortex-M4 in portable ultrasound probe. IC Role / Device Role / Timing Role: Generates precise reset pulse after 3.3V rail stabilizes, synchronized with clock domain initialization. Use Value: Fixed 2.188V threshold and ±2.5% accuracy guarantee repeatable power-on behavior across temperature extremes. | Use Scenario: Supervising dual-rail 5V/3.3V power in modular I/O controller with hot-swap capability. IC Role / Device Role / Timing Role: Monitors main 5V rail while MR pin accepts system-level reset command from backplane. Use Value: Manual reset input enables coordinated firmware recovery without power cycle; SOT23-5 footprint saves PCB area in dense modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6316LUK22+T | Same SOT23-5 package, 2.188V threshold, but fixed 200ms timeout (no capacitor adjustment) | Lacks programmable reset delay - unsuitable where μP requires custom timeout | Select when simplicity and guaranteed long timeout outweigh need for tuning |
| TPS3808G18DBVR | 2.175V threshold, 1.5µA ICC, but only 2.5% accuracy at +25°C (±5% over full temp range) | Lower accuracy impacts reliability in wide-temperature deployments like automotive | Prefer for cost-sensitive consumer designs where ±5% threshold variation is acceptable |
Compared with MAX6412UK22+T, MAX6316LUK22+T trades timeout flexibility for fixed-duration simplicity, while TPS3808G18DBVR offers lower current but reduced temperature stability - making MAX6412UK22+T optimal for high-reliability, field-deployed systems requiring both precision and configurability.
Availability
MAX6412UK22+T is available at Aetrix Electronics and suitable for battery-powered controllers, automotive body electronics, and medical handhelds requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6412UK22+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.
The MAX6412UK22+T belongs to the MAX6412–MAX6420 family of low-power μP supervisors engineered for robust voltage monitoring and reset generation in space-constrained, battery-sensitive, and high-temperature environments.
FAQ
What is the exact reset threshold voltage of the MAX6412UK22+T?
The MAX6412UK22+T has a factory-trimmed VCC reset threshold of 2.188V, with ±2.5% accuracy over the full operating temperature range (-40°C to +125°C). This value is confirmed in Table 1 of the datasheet (suffix "22") and verified in the Electrical Characteristics table under VTH parameter conditions.
Does the MAX6412UK22+T support manual reset functionality?
Yes, the MAX6412UK22+T includes a dedicated MR (manual reset) input on Pin 3. It is active-low, features an internal 20kΩ pullup resistor, and requires a minimum 1µs pulse width. The MR pin allows external initiation of reset independent of VCC conditions, and reset remains asserted for the full timeout period after MR is released.
What capacitor value sets the typical 4.375ms reset timeout for the MAX6412UK22+T?
A 1500pF ceramic capacitor connected between the SRT pin (Pin 4) and GND sets the typical reset timeout period of 4.375ms for the MAX6412UK22+T. This is explicitly specified in the Electrical Characteristics table under "Reset Timeout Period" with condition CSRT = 1500pF.
Can the MAX6412UK22+T operate reliably below 1.8V supply voltage?
Yes, the MAX6412UK22+T operates from 1.0V to 5.5V and guarantees valid reset output down to VCC = 1.0V. Its supply current remains low (1.7µA typical at VCC ≤ 2.0V), and RESET output specifications (VOL, VOH) are characterized down to 1.0V, enabling use in ultra-low-voltage battery applications.
Is the MAX6412UK22+T qualified for automotive applications?
The base MAX6412UK22+T is rated for -40°C to +125°C and meets AEC-Q100 stress test requirements; however, automotive qualification requires the /V suffix (e.g., MAX6412UK22/V+T). The +T suffix indicates RoHS-compliant lead-free packaging, but full automotive qualification is only confirmed for /V variants per the Ordering Information table.
MAX6412UK22+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:
- 2.188V
- 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
MAX6412UK22+T FAQ
1.How can I place an order for MAX6412UK22+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6412UK22+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 MAX6412UK22+T reliable?
The price and inventory of MAX6412UK22+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6412UK22+T is usually 5 days.
3.What payment methods are accepted for MAX6412UK22+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6412UK22+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6412UK22+T?
MAX6412UK22+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6412UK22+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 MAX6412UK22+T?
For technical support, including MAX6412UK22+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6412UK22+T requirements.
6.How does Aetrix verify that MAX6412UK22+T is sourced from the original manufacturer or authorized distributors?
All MAX6412UK22+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 MAX6412UK22+T meets industry standards.
7.What is the process for return or replacement of MAX6412UK22+T?
All MAX6412UK22+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6412UK22+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 MAX6412UK22+T part is unused and in its original packaging.
Return procedure for MAX6412UK22+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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