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Analog Devices Inc./Maxim Integrated MAX6413UK29-T
- Part No.:
- MAX6413UK29-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6413UK29-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,500
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Product details
Overview
The MAX6413UK29-T from Maxim Integrated is a low-power microprocessor supervisor IC with fixed 2.925V VCC reset threshold, active-high push-pull reset output, manual reset input (MR), and capacitor-adjustable reset timeout. It monitors supply voltage in systems from 1.6V to 5V, asserts reset during brownout or power-up, and guarantees valid reset logic down to VCC = 1V. It is used in automotive ECUs and battery-powered controllers requiring precise, temperature-stable reset timing.
For engineers reviewing the MAX6413UK29-T datasheet, MAX6413UK29-T pinout, MAX6413UK29-T application, or MAX6413UK29-T equivalent, key selection criteria include its 2.925V ±2.5% threshold accuracy over –40°C to +125°C, 1.7µA typical quiescent current at 2V, SOT23-5 package, manual reset capability, and externally programmable 275µs–5.75ms timeout via SRT capacitor.
Technical Context
The MAX6413UK29-T implements a precision bandgap-based voltage comparator for VCC monitoring with factory-trimmed 2.925V threshold and 4×VTH hysteresis (≈11.7mV). Its reset assertion logic responds to VCC falling below threshold, MR low pulse ≥1µs, or RESET IN falling below 1.255V - with reset deassertion delayed by a current-source–charged external capacitor on SRT.
It features an internal 20kΩ MR pullup resistor, guaranteed VOL ≤0.3V at ISINK = 500µA (VCC ≥ 1.8V), VOH ≥0.8×VCC at ISOURCE = 200µA (VCC ≥ 1.8V), and operates with full functionality across –40°C to +125°C. The device is AEC-Q100 qualified for automotive use when ordered with /V suffix.
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 temperature range |
| Quiescent Current | 1.7µA typ at VCC ≤ 2.0V - enables multi-year operation in coin-cell–powered systems |
| Reset Timeout Range | 275µs to 5.75ms (CSRT = 0F to 1500pF) - supports µP reset hold times from fast boot to complex initialization |
| MR Input Logic | Active-low with 20kΩ internal pullup - eliminates external components for manual reset implementation |
| RESET Output Type | Active-high push-pull - drives µP reset pin directly without external pullup; sinks 500µA at VOL ≤0.3V |
| Operating Temperature | –40°C to +125°C - meets extended industrial and automotive under-hood requirements |
| Supply Voltage Range | 1.0V to 5.5V - guarantees reset validity during deep brownout and supports 1.2V/1.8V/3.3V/5V systems |
Pinout & Package
SOT23-5 package: 2.9mm × 1.6mm × 1.1mm body, 0.95mm pitch, gull-wing leads, RoHS-compliant lead-free finish (+T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-high push-pull reset output | Drives µP reset pin high after timeout; no external pullup needed; VOL ≤0.3V @ 500µA sink |
| 2 - GND | Ground reference | Return path for all internal circuits; must be low-impedance connection to system ground plane |
| 3 - MR | Manual reset input | Active-low; internally pulled up to VCC (20kΩ); 1µs minimum pulse width; 75ns glitch rejection |
| 4 - SRT | Set reset timeout capacitor node | 240nA constant-current ramp source; connects to ground via CSRT to program timeout period |
| 5 - VCC | Supply voltage and monitored rail | Power input and primary reset trigger; monitors itself from 1.0V to 5.5V; reset valid down to 1V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 2.925V threshold | Eliminates external resistor divider; achieves ±2.5% accuracy over full temperature range without calibration |
| Capacitor-programmable timeout | Enables precise, board-level tuning of reset duration (275µs–5.75ms) without firmware or component changes |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic µP behavior during deep undervoltage events common in automotive cold-crank scenarios |
| 20kΩ internal MR pullup | Reduces BOM count and PCB area; allows momentary switch-to-ground implementation with no external parts |
| AEC-Q100 qualification option | Available as MAX6413UK29/V+T for automotive applications requiring stress-tested reliability and traceable lot control |
Applications
| Automotive Engine Control Unit (ECU) | Portable Medical Monitor |
|---|---|
Use Scenario: Monitors 3.3V microcontroller supply during engine start-stop cycles where VCC dips to 2.8V for 50ms. IC Role / Device Role / Timing Role: Asserts active-high RESET for 4.375ms (CSRT = 1500pF) to hold µP in reset until stable 3.3V is restored. Use Value: Prevents code corruption during cold-crank brownout; leverages ±2.5% threshold tolerance to avoid false resets at marginal voltages. | Use Scenario: Powers on a low-power ARM Cortex-M0+ in a handheld glucose meter using a single 3V CR2032 cell. IC Role / Device Role / Timing Role: Detects VCC decay below 2.925V and holds reset for 2.5ms to allow orderly shutdown before battery depletion. Use Value: 1.7µA quiescent current extends battery life beyond 2 years; SOT23-5 footprint minimizes PCB area in space-constrained enclosure. |
| Industrial PLC I/O Module | Smart Energy Meter |
Use Scenario: Supervises dual-rail 5V/3.3V power in a DIN-rail mounted controller exposed to –40°C ambient. IC Role / Device Role / Timing Role: Provides temperature-stable reset assertion using factory-trimmed 2.925V threshold with no drift compensation required. Use Value: Eliminates need for external temperature-sensing circuitry; specified performance over –40°C to +125°C removes derating concerns. | Use Scenario: Ensures secure boot of metrology SoC after AC power interruption in a utility-grade electricity meter. IC Role / Device Role / Timing Role: Generates 3.0ms reset pulse upon VCC recovery from brownout, synchronized to internal 240nA SRT current source. Use Value: Capacitor-adjustable timeout matches SoC's internal PLL lock time; avoids race conditions during power restoration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US29D3+ | Fixed 2.93V threshold, 1.6µA ICC, same SOT23-5, but uses internal RC timeout (fixed 200ms) instead of capacitor-adjustable | Lacks programmable timeout; unsuitable where µP requires <1ms or >100ms reset hold time | Select MAX6413UK29-T when timeout flexibility is required; choose MAX6315US29D3+ only for cost-sensitive, fixed-timing designs |
| TPS3808G33DBVR | 2.93V threshold, 2.5µA ICC, open-drain output, requires external pullup; no manual reset input | Cannot drive µP reset directly without pullup; lacks MR pin for field service reset | Use MAX6413UK29-T where active-high push-pull output and MR functionality are mandatory; TPS3808G33DBVR fits only if system already has pullup and no manual reset needed |
Compared with MAX6315US29D3+, the MAX6413UK29-T offers design flexibility through capacitor-adjustable timeout and manual reset, while compared with TPS3808G33DBVR it provides direct-drive capability and integrated MR-critical for automotive diagnostics and field-serviceable equipment.
Availability
MAX6413UK29-T is available at Aetrix Electronics and suitable for automotive engine control units, portable medical monitors, and industrial PLC I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6413UK29-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.
The MAX6412–MAX6420 family delivers ultra-low-power, temperature-stable microprocessor supervision with flexible reset timing-targeting systems where reliability under voltage transients and long-term battery operation are critical.
FAQ
What is the exact reset threshold voltage of the MAX6413UK29-T and how tightly is it specified?
The MAX6413UK29-T has a nominal VCC reset threshold of 2.925V, with ±2.5% accuracy guaranteed over the full operating temperature range of –40°C to +125°C. This specification is laser-trimmed at wafer level and confirmed in production test; typical variation at +25°C is ±1.25%. The threshold applies solely to the VCC pin and does not govern the RESET IN pin, which has a separate 1.255V threshold.
Does the MAX6413UK29-T support manual reset, and what are the electrical requirements for the MR pin?
Yes, the MAX6413UK29-T includes a dedicated MR (manual reset) input on pin 3. It is active-low with an internal 20kΩ pullup to VCC, so it may be left unconnected if unused. To assert reset, pull MR to GND for ≥1µs; the device rejects glitches shorter than 75ns. MR-to-RESET delay is 20ns, and the pin accepts logic levels compliant with standard CMOS thresholds (VIL ≤0.3×VCC, VIH ≥0.7×VCC).
How is the reset timeout period set on the MAX6413UK29-T, and what capacitor value yields a 4.375ms timeout?
The reset timeout period on the MAX6413UK29-T is set by connecting a capacitor (CSRT) between pin 4 (SRT) and GND. Using the formula tRP = (2.71 × 10⁶) × CSRT + 275µs (with tRP in seconds and CSRT in farads), a 4.375ms timeout requires CSRT = (0.004375 − 0.000275) / 2.71×10⁶ = 1500pF. Ceramic capacitors with leakage <10nA are recommended.
Can the MAX6413UK29-T operate reliably at VCC = 1.2V, and what is its reset behavior below 1V?
Yes, the MAX6413UK29-T is fully specified down to VCC = 1.0V and guarantees valid RESET output (VOH ≥0.8×VCC, VOL ≤0.3V) across that range. Below 1V, RESET sourcing/sinking capability degrades significantly; for applications requiring valid logic down to 0V, a 100kΩ pullup resistor from RESET to VCC is recommended - as documented in Maxim's application note for MAX6413UK29-T.
Is the MAX6413UK29-T qualified for automotive applications, and what suffix indicates this qualification?
The base MAX6413UK29-T is rated for –40°C to +125°C operation but is not inherently AEC-Q100 qualified. Automotive qualification is available under the ordering part number MAX6413UK29/V+T, where the "/V" suffix denotes AEC-Q100 Grade 1 compliance (–40°C to +125°C) and the "+" indicates lead-free packaging. This variant undergoes additional stress testing and lot traceability per automotive standards.
MAX6413UK29-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:
- 2.925V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6413UK29-T FAQ
1.How can I place an order for MAX6413UK29-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6413UK29-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 MAX6413UK29-T reliable?
The price and inventory of MAX6413UK29-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6413UK29-T is usually 5 days.
3.What payment methods are accepted for MAX6413UK29-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6413UK29-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6413UK29-T?
MAX6413UK29-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6413UK29-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 MAX6413UK29-T?
For technical support, including MAX6413UK29-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6413UK29-T requirements.
6.How does Aetrix verify that MAX6413UK29-T is sourced from the original manufacturer or authorized distributors?
All MAX6413UK29-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 MAX6413UK29-T meets industry standards.
7.What is the process for return or replacement of MAX6413UK29-T?
All MAX6413UK29-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6413UK29-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 MAX6413UK29-T part is unused and in its original packaging.
Return procedure for MAX6413UK29-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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