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Analog Devices Inc./Maxim Integrated MAX6414UK29+T
- Part No.:
- MAX6414UK29+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6414UK29+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,498
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Product details
Overview
MAX6414UK29+T from Maxim Integrated is a low-power microprocessor supervisor IC with fixed 2.925V VCC reset threshold, manual reset input (MR), and active-low open-drain RESET output. It monitors supply voltage in battery-powered controllers and embedded systems, asserts reset during brownout or power-up, and uses an external capacitor on SRT to set timeout from 0.275ms to >5ms. Operating from -40°C to +125°C, it draws only 1.7µA typical supply current at VCC ≤ 2.0V.
For engineers reviewing the MAX6414UK29+T datasheet, MAX6414UK29+T pinout, MAX6414UK29+T application, or MAX6414UK29+T equivalent, key selection considerations include its 2.925V ±2.5% threshold accuracy over temperature, guaranteed RESET validity down to VCC = 1V, open-drain output compatibility with mixed-voltage µP interfaces, and AEC-Q100-qualified automotive variants.
Technical Context
This device implements a precision bandgap-based voltage comparator for VCC monitoring and a high-impedance MR input with internal 20kΩ pullup. Reset assertion is triggered by VCC falling below 2.925V, MR pulled low, or both - and remains asserted for a capacitor-programmable timeout after recovery.
The open-drain RESET output uses a dedicated NMOS switch referenced to GND, supporting pullup to voltages up to 5.5V independent of VCC. Its 1.0µA leakage when deasserted enables low-power system-level reset bus sharing without contention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.925V ±2.5% over -40°C to +125°C - ensures reliable brownout detection across automotive/industrial temperature ranges |
| Supply Current | 1.7µA typ at VCC ≤ 2.0V - enables multi-year operation in coin-cell–powered IoT sensors |
| RESET Output Type | Active-low open-drain - allows wired-OR reset buses and level-shifting to 3.3V/5V µP inputs |
| Reset Timeout Range | 0.275ms (CSRT = 0F) to 5.75ms (CSRT = 1500pF) - configurable for diverse µP reset timing requirements |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and industrial control environments |
| MR Input Logic | Active-low with 0.3×VCC VIH/0.7×VCC VIL thresholds - compatible with standard CMOS logic drivers |
| Guaranteed RESET Validity | Valid down to VCC = 1V - ensures deterministic reset behavior during deep brownout conditions |
Pinout & Package
SOT23-5 package (U5+2A outline, 5-pin, RoHS-compliant lead-free). Thermal resistance θJA = 255.9°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low open-drain output | Drives low during reset; requires external pullup to define logic-high level (e.g., to µP VDD) |
| 2 - GND | Ground reference | Primary return path for internal comparators and reset logic; must be low-impedance |
| 3 - MR | Manual reset input | Active-low input with internal 20kΩ pullup; debounced internally for ≥1µs pulses |
| 4 - SRT | Set reset timeout input | Connects to external capacitor (CSRT); 240nA constant-current ramp source sets timeout period |
| 5 - VCC | Supply and monitored voltage input | Powers device and provides input to fixed-threshold VCC monitor; operates from 1.0V to 5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-adjustable reset timeout | Enables precise tuning of reset duration (0.275–5.75ms) without firmware changes or BOM revisions |
| Fixed 2.925V reset threshold | Laser-trimmed accuracy eliminates external resistor networks required by adjustable supervisors |
| Open-drain RESET output | Supports shared reset buses and mixed-voltage µP interfaces (e.g., 1.8V core + 3.3V I/O domains) |
| Low 1.7µA quiescent current | Minimizes battery drain in always-on monitoring applications such as medical wearables and remote sensors |
| AEC-Q100 qualified variants | Available as /V+T versions - validated for automotive powertrain and ADAS subsystems requiring zero-defect reliability |
Applications
| Battery-Powered Controllers | Automotive Body Control Modules |
|---|---|
Use Scenario: Monitoring 3.3V rail in a wireless sensor node powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Supervisor asserts active-low RESET to halt MCU execution until VCC stabilizes above 2.925V after cold start or voltage sag. Use Value: Prevents erratic firmware execution during brownout; 1.7µA ICC extends battery life beyond 5 years. | Use Scenario: Reset management for LIN transceiver and microcontroller in door module. IC Role / Device Role / Timing Role: Detects 12V battery dips below 2.925V during load-dump events and holds µP in reset for 4.375ms (CSRT = 1500pF). Use Value: Ensures deterministic state recovery after electrical transients; AEC-Q100 qualification meets OEM robustness requirements. |
| Medical Infusion Pumps | Industrial PLC I/O Modules |
Use Scenario: Supervising dual 2.5V/3.3V rails in safety-critical drug delivery controller. IC Role / Device Role / Timing Role: Provides fail-safe reset initiation via MR button press and automatic VCC monitoring with open-drain output tied to shared system reset bus. Use Value: Enables manual intervention and autonomous brownout response without logic contention; guaranteed RESET validity to VCC = 1V supports graceful shutdown. | Use Scenario: Reset coordination across multiple µPs in modular I/O backplane. IC Role / Device Role / Timing Role: Single MAX6414UK29+T drives wired-OR reset bus with pullup to 5V, asserting RESET across all modules simultaneously. Use Value: Eliminates need for discrete logic gates or multiple supervisors; low leakage (<1.0µA) prevents bus voltage droop during idle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6414UK29-T | Same electrical specs but leaded (Pb-containing) SOT23-5 package; no RoHS compliance | Restricted to legacy industrial equipment where Pb-free is not mandated | Select only if legacy assembly process requires SnPb solder compatibility |
| TLV803EB29DBZR | Fixed 2.93V threshold, push-pull active-low RESET, 0.8µA ICC, SOT23-3 package (no MR pin) | Lacks manual reset input and timeout adjustability; smaller footprint but less flexible | Choose when space-constrained designs omit MR and require minimal quiescent current |
Compared with MAX6414UK29-T, the +T variant offers RoHS compliance and reflow compatibility; compared with TLV803EB29DBZR, MAX6414UK29+T provides MR functionality, capacitor-adjustable timeout, and open-drain flexibility at the cost of higher pin count and slightly higher ICC.
Availability
MAX6414UK29+T is available at Aetrix Electronics and suitable for battery-powered controllers, automotive body electronics, and medical infusion pumps requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6414UK29+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 industrial, automotive, and communications applications.
The MAX6412–MAX6420 family delivers ultra-low-power, capacitor-programmable microprocessor supervisors targeting harsh-environment embedded systems where deterministic reset behavior and long-term supply stability are critical.
FAQ
What is the exact reset threshold voltage of MAX6414UK29+T and how accurate is it?
The MAX6414UK29+T has a factory-laser-trimmed VCC reset threshold of 2.925V, with ±1.25% accuracy at +25°C and ±2.5% over the full -40°C to +125°C operating range. This value is confirmed in Table 1 of the datasheet (suffix "29") and Electrical Characteristics section. The MAX6414UK29+T maintains this precision without external components, enabling reliable brownout detection in automotive and industrial applications.
Does MAX6414UK29+T support manual reset, and what are the MR input specifications?
Yes, MAX6414UK29+T includes a dedicated MR (manual reset) input on Pin 3. It is active-low with internal 20kΩ pullup, accepts logic-low pulses ≥1µs wide, and rejects glitches <75ns. VIH/VIL thresholds scale with VCC (0.7×VCC / 0.3×VCC), ensuring compatibility with varying logic families. The MR function is fully integrated - no external components are needed unless custom debounce is required.
How is the reset timeout period set on MAX6414UK29+T, and what capacitor value gives a 4.375ms delay?
The reset timeout on MAX6414UK29+T is set by connecting a capacitor (CSRT) between Pin 4 (SRT) and GND. Using the formula tRP = (2.71 × 10⁶) × CSRT + 275µs, a 4.375ms timeout requires CSRT = (4.375ms − 0.275ms) / 2.71M ≈ 1500pF. Ceramic capacitors with <10nA leakage are recommended. The MAX6414UK29+T datasheet confirms this value yields 4.375ms typical timeout at +25°C.
Can MAX6414UK29+T drive a 5V microprocessor reset input while operating from a 3.3V supply?
Yes, MAX6414UK29+T's open-drain RESET output (Pin 1) supports this configuration. When VCC = 3.3V, connect an external pullup resistor (e.g., 10kΩ) from RESET to the µP's 5V VDD rail. The MAX6414UK29+T sinks current during reset and releases the line otherwise, allowing the 5V rail to pull it high. This is explicitly supported per the "Interfacing to Other Voltages" section and Figure 5 in the MAX6414UK29+T datasheet.
Is MAX6414UK29+T qualified for automotive applications, and what is its AEC-Q100 status?
The base MAX6414UK29+T is not AEC-Q100 qualified, but the automotive-grade variant MAX6414UK29/V+T is explicitly listed in the Ordering Information table and qualified per AEC-Q100 Rev H. It shares identical electrical specs and SOT23-5 packaging but undergoes additional stress testing for automotive use. For non-automotive industrial applications, MAX6414UK29+T is fully specified from -40°C to +125°C and widely deployed in harsh environments.
MAX6414UK29+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:
- 2.925V
- 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
MAX6414UK29+T FAQ
1.How can I place an order for MAX6414UK29+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6414UK29+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 MAX6414UK29+T reliable?
The price and inventory of MAX6414UK29+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6414UK29+T is usually 5 days.
3.What payment methods are accepted for MAX6414UK29+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6414UK29+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6414UK29+T?
MAX6414UK29+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6414UK29+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 MAX6414UK29+T?
For technical support, including MAX6414UK29+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6414UK29+T requirements.
6.How does Aetrix verify that MAX6414UK29+T is sourced from the original manufacturer or authorized distributors?
All MAX6414UK29+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 MAX6414UK29+T meets industry standards.
7.What is the process for return or replacement of MAX6414UK29+T?
All MAX6414UK29+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6414UK29+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 MAX6414UK29+T part is unused and in its original packaging.
Return procedure for MAX6414UK29+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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