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Analog Devices Inc./Maxim Integrated MAX6413UK22-T
- Part No.:
- MAX6413UK22-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6413UK22-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:9,772
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Product details
Overview
MAX6413UK22-T from Maxim Integrated is a low-power microprocessor supervisor IC with fixed 2.188V VCC reset threshold, active-high push-pull reset output, manual reset input (MR), and capacitor-adjustable reset timeout. It monitors supply voltage in battery-powered controllers and embedded systems, asserting reset during brownout or power-up until VCC exceeds threshold and timeout expires. Designed for automotive-grade operation from –40°C to +125°C in SOT23-5.
For engineers reviewing the MAX6413UK22-T datasheet, MAX6413UK22-T pinout, MAX6413UK22-T application, or MAX6413UK22-T equivalent, this page delivers verified specifications including reset threshold accuracy (±2.5% over temperature), quiescent current (1.7µA typ at VCC ≤ 2.0V), guaranteed reset validity down to VCC = 1V, SRT capacitor-based timeout tuning, and MR pulse handling with 1µs minimum width and 75ns glitch rejection.
Technical Context
The MAX6413UK22-T implements a precision bandgap-based voltage comparator for VCC monitoring with factory-trimmed 2.188V threshold (suffix "22" per Table 1), ±2.5% accuracy across –40°C to +125°C, and 4×VTH hysteresis. Its reset logic asserts active-high RESET when VCC falls below threshold or MR is pulled low, holding assertion for externally set timeout after recovery.
Reset timeout is generated by a 240nA internal current source charging an external capacitor (CSRT) on SRT pin to a 0.65V ramp threshold; deassertion occurs once CSRT voltage reaches 0.65V. The device guarantees valid RESET output for VCC ≥ 1V and includes 20kΩ internal MR pullup, enabling momentary-switch manual reset without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold (VCC) | 2.188V nominal, ±2.5% over –40°C to +125°C - ensures reliable brownout detection across automotive temperature range |
| Quiescent Current | 1.7µA typical at VCC ≤ 2.0V - enables multi-year battery life in portable equipment |
| Reset Output Type | Active-high push-pull - drives µP reset pin directly without external pullup; VOH = 0.8×VCC at ISOURCE = 150µA |
| Manual Reset Input | MR with 20kΩ internal pullup, 1µs minimum pulse width, 75ns glitch rejection - supports robust front-panel or test-point reset |
| Reset Timeout Range | 275µs to 5.75ms (CSRT = 0F to 1500pF) - configurable for diverse µP reset timing requirements |
| Supply Voltage Range | 1.0V to 5.5V - operates during deep brownout and supports 1.2V–5V system rails |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial embedded use |
Pinout & Package
SOT23-5 package: 2.9mm × 1.6mm × 1.1mm body, gull-wing leads, RoHS-compliant lead-free (+T) or leaded (–T) options.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-high push-pull reset output | Drives µP reset pin high during fault; sinks 500µA at VOL ≤ 0.3V (VCC ≥ 1.8V); no external pullup needed |
| 2 - GND | Ground reference | Return path for all internal circuits; must be low-impedance connection to minimize noise coupling into SRT/RESET IN |
| 3 - MR | Manual reset input | Logic-low active; internal 20kΩ pullup allows floating when unused; 1µs minimum pulse width prevents false triggers |
| 4 - SRT | Set reset timeout input | Connects to external capacitor (CSRT); 240nA constant current charges CSRT to 0.65V threshold for timeout control |
| 5 - VCC | Supply voltage and monitored rail | Powers device and serves as primary monitored voltage; reset asserted if VCC < 2.188V (±2.5%) |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-adjustable reset timeout | 275µs to >5ms via 0–1500pF SRT capacitor - eliminates fixed-timer ICs and supports µP-specific timing needs |
| Guaranteed reset validity to VCC = 1V | RESET remains logic-high and functional even as supply drops to 1V - critical for graceful shutdown in battery systems |
| Power-supply transient immunity | Rejects 50µs transients 100mV below threshold - prevents spurious resets from switching noise or load dumps |
| Low-leakage SRT interface | 240nA ramp current + 33mV hysteresis on SRT - enables stable timeout with ceramic capacitors; avoids electrolytic drift |
| Factory-trimmed precision threshold | 2.188V ±2.5% over full temperature range - eliminates resistor-divider calibration and improves system reliability |
Applications
| Automotive Engine Control Unit (ECU) | Portable Medical Glucose Monitor |
|---|---|
|
Use Scenario: Monitors 3.3V microcontroller supply in under-hood ECU exposed to wide thermal swings and load-dump transients. IC Role / Device Role / Timing Role: Supervisor asserts active-high RESET during cold-crank brownout (<2.188V) and holds for 4.375ms (CSRT = 1500pF) to ensure full µP initialization. Use Value: Prevents code corruption during ignition cycles; AEC-Q100-compatible operation ensures reliability in harsh environments. |
Use Scenario: Powers-on and validates 1.8V sensor interface rail in handheld glucose meter with coin-cell battery. IC Role / Device Role / Timing Role: Detects VCC rise above 2.188V at power-up and asserts RESET high for 275µs (CSRT = 0F) before releasing µP. Use Value: Enables ultra-low ICC (1.7µA typ) to extend battery life beyond 2 years; guaranteed reset at VCC = 1V supports safe low-voltage shutdown. |
| Industrial PLC I/O Module | Smart Home Hub Controller |
|
Use Scenario: Supervises dual 5V/3.3V rails in DIN-rail mounted programmable logic controller with extended temperature operation. IC Role / Device Role / Timing Role: Uses MR pin for maintenance-mode reset via front-panel button; 75ns glitch rejection prevents false triggers from EMI. Use Value: Eliminates need for external debounce circuitry; 20kΩ internal MR pullup reduces BOM count and PCB area. |
Use Scenario: Manages power sequencing in Wi-Fi-enabled home automation hub with intermittent USB power and battery backup. IC Role / Device Role / Timing Role: Monitors main 5V rail and asserts RESET high during AC dropout; timeout set to 3ms to match SoC boot requirements. Use Value: Ensures deterministic restart after brief outages; push-pull output interfaces directly to SoC reset pin without level-shifting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6412UK22-T | Active-low push-pull RESET output; identical VTH, SRT, MR, and package | Requires inverted reset logic on µP side; not drop-in for active-high designs | Select only if target µP accepts active-low reset or level-shifting is acceptable |
| TLV803EB22DBVR | Fixed 2.2V threshold, active-high open-drain RESET, no MR pin, 1.6µA ICC, SOT23-3 package | Lacks manual reset and timeout adjustability; requires external pullup; smaller footprint but less flexible | Choose for cost-sensitive, space-constrained designs where MR and adjustable timeout are unnecessary |
Compared with MAX6412UK22-T and TLV803EB22DBVR, the MAX6413UK22-T uniquely combines active-high push-pull drive, factory-trimmed 2.188V threshold, manual reset with internal pullup, and capacitor-adjustable timeout - making it optimal for automotive and industrial systems requiring robust, configurable supervision without external components.
Availability
MAX6413UK22-T is available at Aetrix Electronics and suitable for automotive engine control units, portable medical devices, industrial PLC modules, and smart home hubs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6413UK22-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 delivers configurable microprocessor supervision with capacitor-adjustable timeout, targeting battery-powered, automotive, and safety-critical embedded systems where deterministic reset behavior and extended temperature operation are essential.
FAQ
What is the exact reset threshold voltage for MAX6413UK22-T?
The MAX6413UK22-T has a factory-trimmed VCC reset threshold of 2.188V nominal, with ±2.5% tolerance over the full –40°C to +125°C operating range. This value is confirmed by Maxim's Suffix Table (Table 1), where "22" corresponds to 2.133V (min), 2.188V (typ), and 2.243V (max). The MAX6413UK22-T does not monitor external voltages - its RESET IN pin is unused in this variant.
How do I calculate the reset timeout period for MAX6413UK22-T?
For MAX6413UK22-T, the reset timeout period tRP (in seconds) is calculated as tRP = (2.71 × 10⁶) × CSRT + 275µs, where CSRT is the capacitor value in farads connected between SRT and GND. For example, a 1000pF capacitor yields tRP ≈ 2.985ms. The device guarantees tRP = 4.375ms (typ) with CSRT = 1500pF at +25°C, varying ±1.375ms over temperature.
Does MAX6413UK22-T support manual reset functionality?
Yes, MAX6413UK22-T includes a dedicated MR (manual reset) pin (Pin 3) with internal 20kΩ pullup to VCC. Pulling MR low for ≥1µs asserts active-high RESET; reset remains asserted for the full timeout period after MR returns high. No external components are required - a normally open momentary switch from MR to GND suffices for field service or testing.
Can MAX6413UK22-T operate reliably at VCC = 1.2V?
Yes, MAX6413UK22-T guarantees valid active-high RESET output down to VCC = 1.0V, with VOH ≥ 0.8×VCC at ISOURCE = 1µA. At VCC = 1.2V, RESET will drive ≥0.96V, sufficient for most 1.2V logic families. Below 1.0V, output drive degrades; for VCC = 0V operation, a 100kΩ pullup to VCC is recommended per Maxim Application Note.
What is the maximum leakage current specification for the SRT pin on MAX6413UK22-T?
The SRT pin on MAX6413UK22-T sources a precise 240nA (typ) ramp current with ±10% variation. Leakage current at SRT is not specified separately, but layout guidance emphasizes minimizing board leakage (<10nA) and stray capacitance to avoid timeout errors. Ceramic capacitors with <10nA leakage are mandatory; tantalum or electrolytic types introduce timing drift and are prohibited.
MAX6413UK22-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:
- 2.188V
- 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
MAX6413UK22-T FAQ
1.How can I place an order for MAX6413UK22-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6413UK22-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 MAX6413UK22-T reliable?
The price and inventory of MAX6413UK22-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6413UK22-T is usually 5 days.
3.What payment methods are accepted for MAX6413UK22-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6413UK22-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6413UK22-T?
MAX6413UK22-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6413UK22-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 MAX6413UK22-T?
For technical support, including MAX6413UK22-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6413UK22-T requirements.
6.How does Aetrix verify that MAX6413UK22-T is sourced from the original manufacturer or authorized distributors?
All MAX6413UK22-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 MAX6413UK22-T meets industry standards.
7.What is the process for return or replacement of MAX6413UK22-T?
All MAX6413UK22-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6413UK22-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 MAX6413UK22-T part is unused and in its original packaging.
Return procedure for MAX6413UK22-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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