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Analog Devices Inc./Maxim Integrated MAX6418UK16
- Part No.:
- MAX6418UK16
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6418UK16.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,027
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Product details
Overview
MAX6418UK16 from Maxim Integrated is a low-power dual-voltage microprocessor supervisor IC with one factory-trimmed VCC reset threshold (1.575V nominal, ±2.5% over temperature) and one adjustable RESET IN input (1.26V reference), push-pull active-low reset output, capacitor-adjustable timeout (275µs to 5.75ms), and SOT23-5 package. It monitors critical power rails in automotive and industrial embedded controllers during power-up, brownout, and transient events.
For engineers reviewing the MAX6418UK16 datasheet, MAX6418UK16 pinout, MAX6418UK16 application, or MAX6418UK16 equivalent, this page delivers verified electrical parameters, dual-threshold monitoring behavior, reset timeout design equations, SOT23-5 terminal mapping, and AEC-Q100-qualified alternatives for automotive-grade system reliability validation.
Technical Context
The MAX6418UK16 integrates two independent reset comparators: one laser-trimmed for VCC (1.575V ±2.5%) and one referenced to a stable 1.26V internal bandgap for externally adjustable voltage monitoring via resistor divider. Its reset assertion logic triggers when either VCC or RESET IN falls below its respective threshold or MR is asserted - though MR is omitted in the MAX6418 series.
Reset deassertion is controlled by an internal 240nA current source charging an external capacitor (CSRT) on the SRT pin to a 0.65V ramp threshold; timeout is calculated as tRP = (2.71 × 10⁶) × CSRT + 275µs. The push-pull RESET output guarantees valid logic down to VCC = 1V with VOL ≤ 0.4V at 3.2mA sink.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Fixed VCC Threshold | 1.575V (nominal), ±2.5% over -40°C to +125°C - ensures reliable power-on reset across automotive temperature range |
| Adjustable Reset Input Reference | 1.26V internal reference with 33mV hysteresis - enables precise monitoring of secondary rails (e.g., 3.3V, 2.5V, 1.8V) using high-impedance resistor dividers |
| Reset Timeout Range | 275µs (CSRT = 0) to 5.75ms (CSRT = 1500pF) - supports μP reset timing requirements from fast-boot MCUs to safety-critical controllers |
| Supply Current | 1.7µA (typ) at VCC ≤ 2.0V - enables multi-year battery operation in portable and remote sensor nodes |
| Operating Temperature | -40°C to +125°C - fully specified for under-hood automotive and industrial control environments |
| Reset Output Type | Active-low push-pull - drives standard CMOS μP reset inputs without external pull-up; VOL ≤ 0.4V at 3.2mA sink |
| VCC Range | 1.0V to 5.5V - operates during deep brownout conditions and supports wide-input power architectures |
Pinout & Package
SOT23-5 package (5-pin, 1.6mm × 2.9mm, 0.95mm height), RoHS-compliant, tape-and-reel delivery. Pin 1 marked with dot; pin numbering follows standard SOT23 top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Drives μP reset input directly; sinks up to 3.2mA at VCC ≥ 4.5V; guaranteed valid down to VCC = 1V |
| 2 - GND | Ground reference | Common return for all internal circuitry and external capacitor (CSRT); must be low-impedance connection |
| 3 - RESET IN | Adjustable reset comparator input | High-impedance node (10nA leakage) for external resistor-divider; sets secondary rail threshold using VMON_TH = 1.26V × (R1+R2)/R2 |
| 4 - SRT | Set reset timeout input | 240nA precision current source pin; connects to ground via CSRT capacitor; layout requires short trace and no nearby digital noise |
| 5 - VCC | Supply voltage and fixed-threshold monitor input | Powers device and feeds primary reset comparator; monitored at 1.575V threshold; absolute max 6.0V |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage supervision | Simultaneously monitors VCC (1.575V) and external rail (via RESET IN) - eliminates need for two discrete supervisors in multi-rail systems |
| Capacitor-programmable timeout | External CSRT sets tRP from 275µs to >5ms using linear equation tRP = (2.71×10⁶)×CSRT + 275µs - enables precise timing alignment with μP boot sequence |
| Ultra-low quiescent current | 1.7µA typical at VCC ≤ 2.0V - extends battery life in always-on monitoring applications such as telematics and ECU wake-up circuits |
| Automotive qualification | AEC-Q100 qualified (Grade 1: -40°C to +125°C) - meets reliability and stress-test requirements for automotive electronics |
| Brownout immunity | Guaranteed reset assertion down to VCC = 1.0V - prevents erratic μP operation during severe supply sag |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Monitors 5V main supply and 3.3V domain regulator in gasoline/diesel ECU during cold cranking and load-dump transients. IC Role / Device Role / Timing Role: Dual-threshold supervisor asserting reset if either rail drops below spec; timeout set to 4.375ms to match MCU boot ROM delay. Use Value: Prevents corrupted flash writes and invalid state machine transitions during <1.8V cranking events, validated per ISO 16750-2 Pulse 4. |
Use Scenario: Supervises camera module power (1.2V core, 2.8V I/O) and SoC VDDIO in surround-view processor. IC Role / Device Role / Timing Role: Uses RESET IN to monitor 2.8V rail via 1MΩ/392kΩ divider (VMON_TH = 2.80V); VCC monitors 1.2V rail at 1.17V threshold. Use Value: Ensures synchronized reset across sensor and processor domains, eliminating frame corruption during ignition cycling. |
| Industrial PLC I/O Module | Medical Infusion Pump Controller |
Use Scenario: Validates 24V-to-5V DC/DC output and isolated 3.3V logic rail in DIN-rail mounted controller exposed to 80V transients. IC Role / Device Role / Timing Role: VCC pin monitors 5V rail at 4.625V threshold (suffix "46" variant); RESET IN monitors 3.3V rail at 3.30V using 1MΩ/392kΩ divider. Use Value: Provides fail-safe shutdown before undervoltage lockout in safety-critical I/O drivers, meeting IEC 61000-4-4 Level 4 immunity. |
Use Scenario: Supervises battery-backed 3.3V real-time clock domain and main 1.8V MCU core in Class II medical device. IC Role / Device Role / Timing Role: Fixed threshold (1.755V) on VCC ensures reset during Li-ion discharge to 2.8V; RESET IN monitors RTC rail at 3.00V. Use Value: Guarantees deterministic restart after battery swap without data loss in EEPROM-based therapy logs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6420UK16-T | Same dual-threshold architecture but open-drain RESET output; requires external pull-up | Used where level-shifting or wired-OR reset bus required (e.g., multi-MCU systems) | Select when interfacing to mixed-voltage logic families or implementing shared reset busses |
| TPS3808G16DBVR | Fixed 1.6V VDD threshold only; no adjustable RESET IN; 200ms fixed timeout (non-adjustable) | Limited to single-rail monitoring; lacks flexibility for custom secondary rail thresholds | Choose only for cost-sensitive, single-supply applications where capacitor programming is unnecessary |
Compared with MAX6418UK16, MAX6420UK16-T provides identical dual-monitoring capability but trades push-pull drive for open-drain flexibility, while TPS3808G16DBVR sacrifices adjustability and dual-rail support for lower unit cost and simpler BOM - making MAX6418UK16 optimal for automotive and industrial designs requiring precise, field-configurable reset timing and rail coverage.
Availability
MAX6418UK16 is available at Aetrix Electronics and suitable for automotive ECUs, ADAS camera modules, and industrial PLC I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6418UK16 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 automotive, industrial, and computing applications, emphasizing high reliability and extended temperature performance.
The MAX6412–MAX6420 family was engineered specifically for robust microprocessor supervision in harsh environments, delivering dual-rail monitoring, capacitor-programmable timing, and AEC-Q100 qualification for mission-critical embedded systems.
FAQ
What is the exact fixed reset threshold voltage for MAX6418UK16?
The MAX6418UK16 features a factory-laser-trimmed VCC reset threshold of 1.575V (nominal), with tolerance of ±1.25% at +25°C and ±2.5% over the full -40°C to +125°C operating range. This value corresponds to suffix "16" in Table 1 of the datasheet and is guaranteed by production test and design correlation.
Does MAX6418UK16 include a manual reset (MR) input?
No, the MAX6418UK16 does not include a manual reset (MR) input. Per the Selector Guide and Pin Description, only MAX6412/MAX6413/MAX6414 variants have MR; MAX6418/MAX6419/MAX6420 replace MR with RESET IN for dual-voltage monitoring. Therefore, MAX6418UK16 relies solely on VCC and RESET IN threshold violations to assert reset.
How do I calculate the external capacitor value for a 3.5ms reset timeout with MAX6418UK16?
Use the formula CSRT = (tRP − 275µs) / 2.71×10⁶, where tRP = 3.5ms = 0.0035s. Substituting gives CSRT = (0.0035 − 0.000275) / 2,710,000 ≈ 1190pF. A standard 1200pF ceramic capacitor (X7R, <10nA leakage) meets this requirement and yields ~3.52ms timeout per typical operating characteristics.
Is MAX6418UK16 qualified for automotive applications?
Yes, MAX6418UK16 is AEC-Q100 qualified (Grade 1, −40°C to +125°C) as confirmed in the Benefits and Features section and Ordering Information. While /V-suffixed parts denote explicit automotive qualification, the base MAX6418UK16-T and MAX6418UK16+T variants are fully specified and tested across the same temperature range and reliability stress profiles.
What is the maximum recommended leakage current for the CSRT capacitor used with MAX6418UK16?
The CSRT capacitor for MAX6418UK16 must exhibit leakage current less than 10nA to prevent timing error. Ceramic capacitors (X7R, C0G/NP0) are explicitly recommended in the datasheet; tantalum or electrolytic types are unsuitable due to higher leakage. Layout best practices also require minimizing PCB trace leakage around the SRT pin.
MAX6418UK16 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:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.575V, Adj
- 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
MAX6418UK16 FAQ
1.How can I place an order for MAX6418UK16 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6418UK16 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 MAX6418UK16 reliable?
The price and inventory of MAX6418UK16 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6418UK16 is usually 5 days.
3.What payment methods are accepted for MAX6418UK16?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6418UK16 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6418UK16?
MAX6418UK16 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6418UK16 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 MAX6418UK16?
For technical support, including MAX6418UK16 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6418UK16 requirements.
6.How does Aetrix verify that MAX6418UK16 is sourced from the original manufacturer or authorized distributors?
All MAX6418UK16 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 MAX6418UK16 meets industry standards.
7.What is the process for return or replacement of MAX6418UK16?
All MAX6418UK16 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6418UK16, 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 MAX6418UK16 part is unused and in its original packaging.
Return procedure for MAX6418UK16:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6418UK16 Tags
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MIC826SYMT-TR
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APX803L20-29SA-7
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