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Analog Devices Inc./Maxim Integrated MAX6415UK-T
- Part No.:
- MAX6415UK-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6415UK-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,286
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Product details
Overview
MAX6415UK-T from Maxim Integrated is a low-power, adjustable-threshold microprocessor supervisor IC in SOT23-5 package, designed to monitor external supply voltages down to 1.26V using an external resistor divider and assert an active-low push-pull reset signal. It features capacitor-adjustable reset timeout (275µs to 5.75ms), 1.7µA typical quiescent current at 2V, guaranteed reset validity down to VCC = 1V, and operates across –40°C to +125°C for automotive and industrial embedded systems.
For engineers reviewing the MAX6415UK-T datasheet, MAX6415UK-T pinout, MAX6415UK-T application, or MAX6415UK-T equivalent, this page delivers verified specifications, exact pin functions, dual-voltage monitoring capability context, reset timeout design equations, and validated alternative parts for brownout protection and μP reset management in battery-powered and safety-critical systems.
Technical Context
The MAX6415UK-T implements a precision 1.26V internal reference with high-impedance RESET IN comparator, enabling externally adjustable voltage monitoring via resistor-divider networks. Its SRT pin sources a stable 240nA ramp current to charge an external capacitor, determining reset timeout duration with ±2.5% threshold accuracy over temperature.
It lacks a manual reset (MR) input and fixed VCC threshold - unlike MAX6412–MAX6414 - and instead dedicates Pin 3 exclusively to RESET IN for flexible voltage detection. The active-low push-pull RESET output drives µP reset inputs directly without external pull-up, supporting logic compatibility from 1.0V to 5.5V VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.26V internal reference; enables monitoring of external voltages ≥1.26V via resistor divider (e.g., 3.3V rail at 10:1 ratio) |
| Quiescent Current | 1.7µA typ at VCC = 2.0V; enables multi-year operation in coin-cell–powered IoT sensors and portable medical devices |
| Reset Timeout Range | 275µs to 5.75ms (CSRT = 0F to 1500pF); supports µP power-up timing requirements from fast-boot MCUs to legacy 8051 derivatives |
| VCC Operating Range | 1.0V to 5.5V; ensures valid reset assertion during deep brownout conditions where VCC drops below 1.8V |
| Reset Output Type | Active-low push-pull; eliminates need for external pull-up resistor and guarantees VOL ≤ 0.3V at ISINK = 500µA |
| Temperature Range | –40°C to +125°C; qualified for under-hood automotive modules and industrial PLC I/O cards |
| Package | SOT23-5; 2.9mm × 1.6mm footprint compatible with high-density PCB layouts and automated assembly |
Pinout & Package
SOT23-5 surface-mount package with exposed pad option not specified; 5-pin configuration optimized for minimal board area and thermal performance in space-constrained applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Drives µP /RESET pin directly; sinks up to 1.2mA while maintaining VOL ≤ 0.3V; no external pull-up required |
| 2 - GND | Ground reference | Return path for internal bias currents and SRT ramp current; must be low-impedance connection to minimize noise coupling |
| 3 - RESET IN | Adjustable reset comparator input | High-impedance node (leakage <10nA) connected to center tap of external resistor divider; sets monitored voltage threshold |
| 4 - SRT | Set Reset Timeout input | 240nA constant-current source pin; connects to ground via CSRT capacitor to program reset timeout period |
| 5 - VCC | Supply voltage and VCC monitor reference | Power input (1.0V–5.5V); also monitored internally for VCC brownout detection with 2.5% threshold accuracy over temperature |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable voltage monitoring | Supports custom reset thresholds ≥1.26V using high-value resistors (e.g., 1MΩ/10MΩ), minimizing divider current to <1µA |
| Capacitor-programmable timeout | Linear tRP = (2.71×10⁶) × CSRT + 275µs enables precise matching to µP reset timing requirements without firmware changes |
| Low-VCC reset validity | Guaranteed RESET assertion down to VCC = 1.0V ensures reliable boot sequencing even during severe brownout events |
| Transient immunity | Rejects VCC glitches ≤50µs duration when overdrive is ≤100mV below threshold, preventing spurious resets in noisy environments |
| AEC-Q100 qualification | Available in /V automotive-grade variants (e.g., MAX6415UK/V+T); meets stress testing requirements for automotive ECUs |
Applications
| Automotive Engine Control Unit (ECU) | Portable Medical Glucose Monitor |
|---|---|
Use Scenario: Monitors 3.3V sensor supply rail and 5V MCU core voltage in engine control module operating under wide temperature and load dump conditions. IC Role / Device Role / Timing Role: Adjustable-reset supervisor asserting active-low RESET to ARM Cortex-M7 during undervoltage on either rail; timeout set to 4.375ms for safe firmware initialization. Use Value: Prevents erratic ECU behavior during cold cranking (VCC dip to 6.5V) by detecting 3.3V rail collapse before MCU lockup, with AEC-Q100 compliance ensuring reliability. |
Use Scenario: Ensures deterministic startup of ultra-low-power MSP430-based glucose meter powered by CR2032 coin cell with aging voltage drop. IC Role / Device Role / Timing Role: Resets microcontroller when battery voltage falls below 2.4V (set via 1.26V reference + R1/R2 divider); timeout configured for 275µs to match fast wake-up requirement. Use Value: Extends usable battery life by enabling operation down to 1.8V VCC while guaranteeing reset assertion before analog front-end ADC misreads due to insufficient supply headroom. |
| Industrial PLC Digital I/O Module | Smart Energy Meter Communication Subsystem |
Use Scenario: Supervises isolated 24V-to-3.3V DC-DC converter output powering communication interface ASIC in factory-floor PLC rack. IC Role / Device Role / Timing Role: Detects 3.3V rail sag during ESD transients; asserts RESET for 3.0ms to allow full ASIC state recovery before re-enabling RS-485 transceivers. Use Value: Eliminates communication lockups caused by partial ASIC initialization; SOT23-5 footprint fits tight spacing between isolation barrier and PHY IC. |
Use Scenario: Monitors backup supercapacitor voltage (2.5V nominal) powering NB-IoT modem during main AC failure in smart meter. IC Role / Device Role / Timing Role: Triggers hard reset of modem SoC when supercap voltage decays below 2.1V; uses 1500pF CSRT for 4.375ms timeout aligned with LTE-M reconnection window. Use Value: Maintains network registration continuity by forcing clean modem reboot before voltage drops below RF IC operational minimum (1.8V), avoiding silent disconnects. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB29DBZR | Fixed 2.93V threshold; no adjustable RESET IN; 350nA IQ; SOT23-3 package | Lacks external voltage monitoring capability; suitable only for single-rail VCC supervision | Select when only VCC monitoring is needed and board space allows SOT23-3; not interchangeable for dual-rail or custom-threshold use cases |
| ADM6315-30ARTZ-RL7 | Fixed 3.08V threshold; 1.6µA IQ; open-drain RESET; requires external pull-up | No adjustable input; open-drain output limits drive strength and increases BOM count | Choose for cost-sensitive designs where 3.08V VCC supervision suffices and pull-up resistor is acceptable; incompatible with push-pull RESET routing |
Compared with TLV803EB29DBZR and ADM6315-30ARTZ-RL7, the MAX6415UK-T uniquely supports externally adjustable voltage monitoring without additional components, delivers push-pull drive eliminating pull-up dependencies, and maintains guaranteed reset functionality down to 1.0V VCC - critical for brownout resilience in automotive and portable systems.
Availability
MAX6415UK-T is available at Aetrix Electronics and suitable for automotive engine control units, portable medical diagnostics, industrial PLC I/O modules, smart energy metering, and battery-powered embedded controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6415UK-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 MAX6412–MAX6420 family was developed specifically for robust microprocessor reset supervision in harsh environments, featuring capacitor-adjustable timeout, wide VCC range, and flexible voltage monitoring architectures to replace discrete reset solutions.
FAQ
What is the function of the SRT pin on the MAX6415UK-T?
The SRT pin on the MAX6415UK-T is a constant-current source (240nA) used to charge an external capacitor (CSRT) to ground, thereby setting the reset timeout period. The formula tRP = (2.71 × 10⁶) × CSRT + 275µs defines the relationship, allowing precise adjustment from 275µs to 5.75ms. This pin must be routed with minimal trace length and shielded from noise to avoid timing errors in the MAX6415UK-T.
Can the MAX6415UK-T monitor a 5V supply rail?
Yes, the MAX6415UK-T can monitor a 5V supply rail using an external resistor divider connected to the RESET IN pin. With its 1.26V internal reference, a 5V rail requires R1 ≈ 2.97MΩ and R2 = 1MΩ (VMON_TH = 1.26 × (R1 + R2)/R2). The MAX6415UK-T's high-impedance input (<10nA leakage) ensures negligible loading, preserving accuracy and power efficiency in the MAX6415UK-T application.
Does the MAX6415UK-T have a manual reset input?
No, the MAX6415UK-T does not include a manual reset (MR) input. Unlike MAX6412–MAX6414 variants, it is designed exclusively for adjustable external voltage monitoring and lacks MR functionality. To implement manual reset, a normally open switch can be placed in parallel with R2 in the RESET IN divider network - closing the switch pulls RESET IN to ground and triggers reset, as documented for the MAX6415UK-T family.
What is the minimum VCC required for valid RESET assertion in the MAX6415UK-T?
The MAX6415UK-T guarantees valid RESET assertion down to VCC = 1.0V, meaning the active-low output remains logically low and capable of sinking ≥50µA while VCC is as low as 1.0V. Below 1.0V, output drive degrades significantly; for applications requiring reset validity down to 0V, an external 100kΩ pulldown resistor on the RESET pin is recommended per Maxim's application guidance for the MAX6415UK-T.
Is the MAX6415UK-T pin-compatible with other devices in the MAX6412–MAX6420 family?
No, the MAX6415UK-T is not pin-compatible with MAX6412/MAX6413/MAX6414 or MAX6418/MAX6419/MAX6420 variants. While all share the SOT23-5 package, Pin 3 is RESET IN (adjustable) in MAX6415UK-T but MR (manual reset) in MAX6412–MAX6414 and dual-function in MAX6418–MAX6420. Swapping parts without layout revision will cause functional failure in the MAX6415UK-T circuit implementation.
MAX6415UK-T 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:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- Adjustable/Selectable
- 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
MAX6415UK-T FAQ
1.How can I place an order for MAX6415UK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6415UK-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 MAX6415UK-T reliable?
The price and inventory of MAX6415UK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6415UK-T is usually 5 days.
3.What payment methods are accepted for MAX6415UK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6415UK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6415UK-T?
MAX6415UK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6415UK-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 MAX6415UK-T?
For technical support, including MAX6415UK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6415UK-T requirements.
6.How does Aetrix verify that MAX6415UK-T is sourced from the original manufacturer or authorized distributors?
All MAX6415UK-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 MAX6415UK-T meets industry standards.
7.What is the process for return or replacement of MAX6415UK-T?
All MAX6415UK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6415UK-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 MAX6415UK-T part is unused and in its original packaging.
Return procedure for MAX6415UK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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