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Analog Devices Inc./Maxim Integrated MAX6412UK23+T
- Part No.:
- MAX6412UK23+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6412UK23+T.pdf
- Description:
- IC RESET MPU LOW PWR SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,811
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Product details
Overview
MAX6412UK23+T from Maxim Integrated is a low-power microprocessor supervisor IC with fixed 2.313V VCC reset threshold, active-low push-pull reset output, manual reset input (MR), and capacitor-adjustable reset timeout. It monitors VCC from 1.0V to 5.5V, guarantees valid reset down to VCC = 1V, and operates across –40°C to +125°C for automotive and industrial embedded systems.
For engineers reviewing the MAX6412UK23+T datasheet, MAX6412UK23+T pinout, MAX6412UK23+T application, or MAX6412UK23+T equivalent, this page delivers verified specifications, SOT23-5 package details, dual-voltage monitoring capability context, quiescent current (1.7µA typ), reset timeout adjustability via external capacitor, and real-world selection guidance against comparable supervisors.
Technical Context
The MAX6412UK23+T implements a precision bandgap-based voltage comparator for VCC monitoring with ±1.25% threshold accuracy at +25°C and ±2.5% over full temperature range. Its reset assertion logic responds to VCC falling below 2.313V, MR pull-down, or both - with reset deassertion delayed by an externally set timeout period determined by SRT pin capacitance.
It features an internal 20kΩ MR pullup resistor, 240nA SRT ramp current source, and guaranteed RESET output validity at VCC ≥ 1V. The push-pull output drives high/low with VOL ≤ 0.3V (ISINK = 50µA) and VOH ≥ 0.8×VCC (ISOURCE = 200µA), enabling direct interface to µP reset inputs without external pullups.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.313V (nominal), ±1.25% accuracy at +25°C - sets precise brownout detection point for 2.5V or 3.3V rails |
| Supply Current | 1.7µA (typ at VCC ≤ 2.0V) - enables multi-year battery life in portable and remote sensor applications |
| Reset Timeout Range | 275µs to 5.75ms (CSRT = 0F to 1500pF) - supports µP power-up sequencing from fast microcontrollers to slow FPGAs |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial control environments |
| Output Type | Active-low push-pull - eliminates need for external pull-up resistor and ensures clean, rail-to-rail reset signal |
| MR Input Logic | Active-low with internal 20kΩ pullup - allows momentary switch-to-ground implementation without external components |
| Reset Validity | Guaranteed to VCC = 1V - ensures reliable reset assertion during deep brownout conditions |
Pinout & Package
SOT23-5 package (U5+2A outline, RoHS-compliant, 5-pin surface-mount). Thermal resistance θJA = 255.9°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Drives µP reset pin low during fault; returns high after timeout - no external pullup required |
| 2 - GND | Ground reference | Common return path for all internal comparators and output stage; must be low-impedance |
| 3 - MR | Manual reset input | Active-low input with internal 20kΩ pullup; asserts reset when pulled ≤ 0.3×VCC |
| 4 - SRT | Set reset timeout input | Connects to external capacitor (CSRT); 240nA current source charges it to 0.65V to define timeout |
| 5 - VCC | Supply voltage and monitored rail | Powers device and serves as primary reset trigger source; valid from 1.0V to 5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 2.313V reset threshold | Factory-laser-trimmed for ±1.25% accuracy at +25°C - eliminates external resistor network and calibration effort |
| Capacitor-adjustable timeout | 275µs to >5ms range via 0–1500pF SRT capacitor - enables one BOM part to support diverse µP startup timing requirements |
| Low 1.7µA quiescent current | Enables use in always-on battery-backed systems (e.g., RTC supervision, tamper detection) without measurable drain |
| –40°C to +125°C operation | Fully specified across automotive AEC-Q100 temperature range - suitable for engine control, ADAS, and industrial PLCs |
| Power-supply transient immunity | Rejects <50µs negative VCC glitches ≥100mV below threshold - prevents spurious resets in noisy electrical environments |
Applications
| Automotive Engine Control Unit (ECU) | Medical Infusion Pump Controller |
|---|---|
Use Scenario: Monitors 3.3V microcontroller supply in under-hood ECU exposed to wide temperature swings and load-dump transients. IC Role / Device Role / Timing Role: Supervises VCC and provides glitch-immune reset pulse with 3ms timeout to ensure deterministic µP boot after ignition cycle. Use Value: Prevents code corruption during cold cranking (VCC dip to 2.1V) and ensures reset remains asserted long enough for flash initialization. |
Use Scenario: Ensures safe restart of safety-critical ARM Cortex-M4 controller after battery swap or low-battery brownout. IC Role / Device Role / Timing Role: Generates clean active-low reset signal synchronized to VCC recovery, with manual reset via front-panel button. Use Value: Guarantees µP enters known state before motor control firmware executes - critical for IEC 62304 compliance. |
| Industrial IoT Sensor Node | Set-Top Box Power Management |
Use Scenario: Powers ultra-low-power MSP430-based sensor node powered by coin cell; requires multi-year runtime and reliable wake-from-reset. IC Role / Device Role / Timing Role: Monitors 1.8V LDO output and asserts reset if voltage sags below 1.75V due to RF transmission current surge. Use Value: 1.7µA supply current extends battery life; 275µs minimum timeout accommodates fast µP wake cycles. |
Use Scenario: Manages reset sequencing for dual-rail (1.2V core / 3.3V I/O) SoC during AC power interruption and standby recovery. IC Role / Device Role / Timing Role: Provides primary reset for 3.3V domain while coordinating with secondary supervisor for core rail. Use Value: Fixed 2.313V threshold matches 3.3V rail tolerance; SRT capacitor allows tuning timeout to match SoC's POR requirement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6412UK24+T | Fixed 2.400V reset threshold (vs. 2.313V); otherwise identical pinout, timing, and features | Used where system VCC nominal is 2.5V with tighter tolerance; less margin for 2.3V brownout detection | Select when design requires higher reset threshold to avoid false triggers near 2.3V operating minimum |
| TPS3808G23DBVR | 2.32V threshold, 350nA IQ, open-drain output, no manual reset input, fixed 200ms timeout | Lacks MR and adjustable timeout; requires external pullup; suited for simpler, lower-power applications without manual intervention | Choose for cost-sensitive, space-constrained designs where fixed timeout and absence of MR are acceptable |
Compared with MAX6412UK23+T, the MAX6412UK24+T offers a higher reset threshold for improved noise margin on 2.5V rails, while the TPS3808G23DBVR trades manual reset and timeout flexibility for ultra-low quiescent current and simplified layout - making it suitable only where those features are nonessential.
Availability
MAX6412UK23+T is available at Aetrix Electronics and suitable for automotive engine control units, medical infusion pump controllers, industrial IoT sensor nodes, and set-top box power management requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6412UK23+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, with emphasis on reliability, low power, and high integration.
The MAX6412–MAX6420 family was engineered specifically for robust µP supervision in harsh environments - delivering capacitor-adjustable reset timing, wide temperature operation, and multiple reset threshold options to simplify power-rail monitoring across diverse embedded platforms.
FAQ
What is the exact reset threshold voltage of the MAX6412UK23+T?
The MAX6412UK23+T has a factory-trimmed VCC reset threshold of 2.313V (nominal), with ±1.25% accuracy at +25°C and ±2.5% over the full –40°C to +125°C operating range. This value is laser-trimmed during production and confirmed in the Electrical Characteristics table of the official datasheet. The '23' suffix directly references this threshold per Table 1 in the MAX6412–MAX6420 datasheet.
Does the MAX6412UK23+T support dual-voltage monitoring?
No, the MAX6412UK23+T does not support dual-voltage monitoring. It is a single-threshold supervisor with fixed VCC monitoring only. Dual-voltage capability is exclusive to the MAX6418/MAX6419/MAX6420 variants, which include both a factory-set VCC threshold and an adjustable RESET IN input. The MAX6412UK23+T lacks the RESET IN pin and associated circuitry.
Can the reset timeout of the MAX6412UK23+T be disabled or set to zero?
No, the reset timeout of the MAX6412UK23+T cannot be disabled or reduced to zero. The minimum timeout is 275µs (when CSRT = 0F), defined by internal circuitry. Leaving SRT unconnected results in this minimum delay. To achieve immediate reset deassertion, a different supervisor family without capacitor-programmable timeout - such as the MAX6326 series - would be required.
Is the MAX6412UK23+T AEC-Q100 qualified?
The MAX6412UK23+T is not explicitly AEC-Q100 qualified. While it is fully specified from –40°C to +125°C and shares the same SOT23-5 package and process as /V automotive-grade variants (e.g., MAX6414UK29/V+T), the MAX6412UK23+T part number itself does not carry the '/V' suffix indicating formal AEC-Q100 qualification. For automotive applications requiring certified parts, select a /V-suffixed variant from the same family.
What is the maximum recommended capacitor value for the SRT pin on the MAX6412UK23+T?
The datasheet specifies CSRT up to 1500pF for a maximum timeout of 5.75ms. While larger capacitors may extend timeout further, Maxim does not characterize or guarantee performance beyond 1500pF. Using >1500pF introduces risk of timing inaccuracy due to leakage, parasitic capacitance, and reduced ramp linearity. For timeouts >5.75ms, consider a supervisor with longer factory-set delay or external timing circuitry.
MAX6412UK23+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:
- 2.313V
- 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
MAX6412UK23+T FAQ
1.How can I place an order for MAX6412UK23+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6412UK23+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 MAX6412UK23+T reliable?
The price and inventory of MAX6412UK23+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6412UK23+T is usually 5 days.
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MAX6412UK23+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6412UK23+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 MAX6412UK23+T?
For technical support, including MAX6412UK23+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6412UK23+T requirements.
6.How does Aetrix verify that MAX6412UK23+T is sourced from the original manufacturer or authorized distributors?
All MAX6412UK23+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 MAX6412UK23+T meets industry standards.
7.What is the process for return or replacement of MAX6412UK23+T?
All MAX6412UK23+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6412UK23+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 MAX6412UK23+T part is unused and in its original packaging.
Return procedure for MAX6412UK23+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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