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Analog Devices Inc./Maxim Integrated MAX6424UK16+T
- Part No.:
- MAX6424UK16+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6424UK16+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6424UK16+T from Analog Devices is a low-power microprocessor supervisor IC with active-low push-pull reset output, 1.575V nominal reset threshold (±1.5% at +25°C), capacitor-adjustable reset timeout (275µs to 5.75ms), and guaranteed operation down to VCC = 1V. It monitors supply voltage in portable and battery-powered systems to prevent erroneous µP execution during power-up, brownout, or power-down.
For engineers reviewing the MAX6424UK16+T datasheet, MAX6424UK16+T pinout, MAX6424UK16+T application, or MAX6424UK16+T equivalent, key selection criteria include reset threshold accuracy over temperature, quiescent current at low VCC, SRT capacitor timing linearity, and compatibility with 5-pin SOT23-5 PCB layouts for industrial and automotive embedded controllers.
Technical Context
The MAX6424UK16+T implements a precision voltage detector with laser-trimmed internal resistors to set the 1.575V reset threshold, and uses a 240nA constant-current source charging an external capacitor on the SRT pin to generate the reset timeout delay. Its push-pull RESET output drives logic-low actively and pulls high via internal transistor without requiring external pullup.
It operates across -40°C to +125°C, maintains valid RESET assertion down to VCC = 1V, and rejects short VCC transients - e.g., a 100mV dip below threshold lasting ≤50µs typically does not trigger reset. The device draws only 1.6µA typical supply current at VCC ≤ 2.0V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.575V nominal, ±1.5% at +25°C; ensures reliable detection of 1.6V system rail collapse |
| Supply Current | 1.6µA typ at VCC ≤ 2.0V; enables multi-year battery life in always-on monitoring |
| Reset Timeout Range | 275µs to 5.75ms (CSRT = 0 to 1500pF); covers µP initialization windows from fast MCUs to legacy controllers |
| VCC Operating Range | 1.0V to 5.5V; supports valid reset assertion even during deep brownout recovery |
| Output Type | Active-low push-pull; eliminates need for external pullup resistor and reduces BOM count |
| Temperature Range | -40°C to +125°C; qualified for under-hood automotive and industrial control environments |
| Reset Propagation Delay | 80µs max (VCC falling at 1mV/µs); provides deterministic response to rapid supply collapse |
Pinout & Package
MAX6424UK16+T is housed in a 5-pin SOT23-5 package (package code U5+2, outline 21-0057), with exposed pad optional per Analog Devices land pattern 90-0174. Pin 1 is SRT (Set Reset Timeout), Pin 2 is GND, Pin 3 is RESET (active-low push-pull), Pin 4 is N.C., and Pin 5 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SRT | Reset timeout capacitor input | Accepts 240nA ramp current; CSRT value directly sets tRP per tRP = 2.73×10⁶ × CSRT + 275µs |
| 2 - GND | Ground reference | Primary return path for internal bias and RESET sink current; must be low-impedance |
| 3 - RESET | Active-low push-pull reset output | Drives µP reset pin low during fault; actively pulls high when deasserted - no external pullup needed |
| 4 - N.C. | No internal connection | May be left floating or tied to GND; no electrical function or routing requirement |
| 5 - VCC | Supply and threshold monitor input | Monitors same rail it powers; valid reset operation guaranteed down to 1.0V supply |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed reset threshold | 1.575V with ±1.5% initial accuracy enables precise 1.6V rail supervision without calibration |
| Capacitor-programmable timeout | External CSRT (0–1500pF) sets tRP from 275µs to 5.75ms, matching diverse µP reset timing requirements |
| Ultra-low quiescent current | 1.6µA typical at 2.0V allows integration into energy-sensitive battery-backed systems |
| Push-pull RESET output | Eliminates external pullup resistor, reduces layout area, and avoids weak-high timing uncertainty |
| Immunity to short VCC transients | Rejects ≤50µs dips of 100mV below threshold - prevents false resets from digital noise coupling |
Applications
| Battery-Powered Medical Sensors | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Continuous glucose monitor powered by coin cell, requiring reliable reset during cold-start and low-battery brownout. IC Role / Device Role / Timing Role: Voltage supervisor asserting RESET until VCC stabilizes above 1.575V and holds for ≥275µs. Use Value: Prevents firmware crash from partial initialization; 1.6µA ICC extends battery life beyond 3 years. | Use Scenario: BCM microcontroller operating from vehicle battery (9–16V) with LDO-regulated 3.3V rail subject to load-dump transients. IC Role / Device Role / Timing Role: Monitors 3.3V rail and asserts push-pull RESET during undervoltage events, with immunity to ≤50µs glitches. Use Value: Ensures deterministic µP restart after ignition cycling; -40°C to +125°C rating supports under-dash mounting. |
| Industrial PLC I/O Module | Portable Test Equipment |
Use Scenario: DIN-rail mounted I/O module with isolated 5V DC-DC supply, needing fail-safe reset during AC mains interruption. IC Role / Device Role / Timing Role: Supervises 5V rail and generates ≥4ms RESET pulse (via 1500pF CSRT) to guarantee full µP core initialization. Use Value: Eliminates race conditions in multi-core SoC boot; push-pull output ensures clean logic transition without pullup leakage. | Use Scenario: Handheld oscilloscope using Li-ion battery and buck-boost regulator delivering 1.8V/3.3V rails. IC Role / Device Role / Timing Role: Dual-rail supervision (using separate MAX6424UK16+T per rail) with independent timeout tuning. Use Value: Enables synchronized reset across analog front-end and digital controller; 5-pin SOT23 footprint simplifies dual-rail layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCP302LSN16T1G | Fixed 1.6V threshold, 200ms min timeout, open-drain output, requires external pullup | Lacks capacitor-adjustable timeout and push-pull drive; suited for simpler, cost-sensitive designs | Select when fixed long timeout and lower unit cost outweigh need for timing flexibility and reduced BOM |
| MC33464D-16SEFR2 | 1.6V threshold, 200ms timeout, push-pull output, but higher 8µA ICC and only rated to +105°C | Higher current draw limits battery lifetime; temperature range insufficient for under-hood use | Choose only for commercial-temp consumer devices where 1.6V threshold alignment is critical and power budget allows |
Compared with NCP302LSN16T1G and MC33464D-16SEFR2, MAX6424UK16+T offers programmable timeout, ultra-low 1.6µA current, and full AEC-Q100-compatible temperature range - making it optimal for precision, low-power, and automotive-grade supervision where timing adaptability and thermal robustness are essential.
Availability
MAX6424UK16+T is available at Aetrix Electronics and suitable for battery-powered medical sensors, automotive body control modules, and industrial PLC I/O modules requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6424UK16+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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The MAX6424UK16+T belongs to the MAX6340/MAX6421–MAX6426 family of low-power µP supervisors, designed specifically for reliable voltage monitoring and reset generation in space-constrained, energy-sensitive embedded systems.
FAQ
What is the exact reset threshold voltage of MAX6424UK16+T and how accurate is it?
The MAX6424UK16+T has a nominal reset threshold of 1.575V, with ±1.5% accuracy at +25°C and ±2.5% over the full -40°C to +125°C operating range. This specification is laser-trimmed at wafer test and confirmed in the Electrical Characteristics table of the official Analog Devices datasheet (Rev 11, 9/24). The threshold applies directly to the VCC pin and defines the voltage below which the RESET output is asserted.
Does MAX6424UK16+T require an external pullup resistor on the RESET pin?
No, MAX6424UK16+T does not require an external pullup resistor because it features an active-low push-pull RESET output. Unlike open-drain variants (e.g., MAX6425UK16+T), the MAX6424UK16+T internally drives RESET high when deasserted, eliminating pullup components and associated leakage or timing uncertainty. This is explicitly stated in the General Description and Pin Description sections of the datasheet.
How do I calculate the reset timeout capacitor value for MAX6424UK16+T?
To set a desired reset timeout period (tRP) in seconds, use the formula CSRT = (tRP − 275µs) / 2.735 × 10⁶, where CSRT is in farads. For example, a 4.375ms timeout requires CSRT = (0.004375 − 0.000275) / 2.735e6 ≈ 1500pF. Ceramic capacitors with <10nA leakage are recommended, and layout best practices (short traces, minimal leakage near SRT) must be followed for accuracy.
Is MAX6424UK16+T qualified for automotive applications?
While MAX6424UK16+T is specified for -40°C to +125°C operation and shares the same process and design as AEC-Q100-qualified variants (e.g., MAX6340UK31/V+T), the MAX6424UK16+T itself is not explicitly listed as AEC-Q100 qualified in the provided documentation. Its qualification status must be verified against Analog Devices' official automotive part matrix or PPAP documentation before deployment in safety-critical automotive systems.
Can MAX6424UK16+T operate reliably when VCC drops below 1.6V?
Yes, MAX6424UK16+T guarantees valid RESET assertion down to VCC = 1.0V, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables. At VCC = 1.0V, the device continues to monitor and assert RESET if the supply falls below 1.575V, and RESET remains asserted for the full timeout period after VCC recovers - enabling robust brownout recovery in low-voltage systems.
MAX6424UK16+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.575V
- 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
MAX6424UK16+T FAQ
1.How can I place an order for MAX6424UK16+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6424UK16+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 MAX6424UK16+T reliable?
The price and inventory of MAX6424UK16+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6424UK16+T is usually 5 days.
3.What payment methods are accepted for MAX6424UK16+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6424UK16+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6424UK16+T?
MAX6424UK16+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6424UK16+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 MAX6424UK16+T?
For technical support, including MAX6424UK16+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6424UK16+T requirements.
6.How does Aetrix verify that MAX6424UK16+T is sourced from the original manufacturer or authorized distributors?
All MAX6424UK16+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 MAX6424UK16+T meets industry standards.
7.What is the process for return or replacement of MAX6424UK16+T?
All MAX6424UK16+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6424UK16+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 MAX6424UK16+T part is unused and in its original packaging.
Return procedure for MAX6424UK16+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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