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Analog Devices Inc./Maxim Integrated MAX6414UK22+T
- Part No.:
- MAX6414UK22+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6414UK22+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,738
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Product details
Overview
The MAX6414UK22+T from Maxim Integrated is a low-power microprocessor supervisor IC with fixed 2.188V VCC reset threshold, manual reset input (MR), and active-low open-drain RESET output. It monitors supply voltage in battery-powered controllers and embedded systems, asserts reset during brownout or power-up, and uses an external capacitor on SRT to set timeout (3.0–5.75ms typical). Designed for automotive-grade operation from –40°C to +125°C.
For engineers reviewing the MAX6414UK22+T datasheet, MAX6414UK22+T pinout, MAX6414UK22+T application, or MAX6414UK22+T equivalent, key selection criteria include its 2.188V fixed threshold accuracy (±2.5% over temperature), 1.7µA typical quiescent current at 2V, guaranteed RESET validity down to VCC = 1V, open-drain output compatibility with mixed-voltage µP interfaces, and SOT23-5 package suitability for space-constrained designs.
Technical Context
The MAX6414UK22+T implements a precision bandgap-based voltage comparator for VCC monitoring with factory-trimmed 2.188V threshold (suffix "22" per Table 1), hysteresis of 4 × VTH (≈8.75mV), and guaranteed operation down to VCC = 1V. Its MR input features internal 20kΩ pullup and 1µs minimum pulse width support.
Reset assertion is triggered by VCC falling below 2.188V, MR low, or both; deassertion requires VCC rise above threshold plus externally programmed timeout via SRT capacitor. The open-drain RESET output supports rail-to-rail logic-level interfacing up to 6.0V and sinks ≤500µA while maintaining VOL ≤ 0.3V at VCC ≥ 1.8V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.188V ±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 battery life in portable medical or sensor nodes |
| RESET Output Type | Active-low open-drain - allows wired-OR configuration and interface to 1.8V/3.3V/5V µP reset inputs |
| Reset Timeout Range | 0.275ms (no cap) to 5.75ms (1500pF) - configurable delay prevents premature µP release during supply stabilization |
| Operating Temp | –40°C to +125°C - AEC-Q100 qualified for under-hood automotive and industrial control applications |
| Supply Range | 1.0V to 5.5V - supports valid reset assertion even during deep brownout conditions |
| MR Input Logic | CMOS-compatible with 0.3×VCC/0.7×VCC thresholds - accepts standard digital reset signals without level-shifting |
Pinout & Package
SOT23-5 package (U5+2A outline, 5-pin, RoHS-compliant, thermal resistance θJA = 255.9°C/W on multilayer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low open-drain output | Drives µP reset input low; requires external pullup; compatible with 0–6.0V logic rails |
| 2 - GND | Ground reference | Common return path for all internal circuitry and external capacitor (SRT) |
| 3 - MR | Manual reset input | Logic-low assertion triggers reset; internal 20kΩ pullup allows NC if unused |
| 4 - SRT | Set reset timeout input | 240nA constant-current ramp source; connects to ground via timing capacitor (CSRT) |
| 5 - VCC | Supply voltage input | Powers device and serves as monitored voltage source; valid from 1.0V to 5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 2.188V VCC threshold | Factory-laser-trimmed for ±2.5% accuracy over full temperature range - eliminates external resistor divider and calibration |
| Capacitor-adjustable timeout | External CSRT sets tRP from 0.275ms to >5ms using dV/dt = 240nA/C - replaces fixed-delay ICs with single BOM item |
| Open-drain RESET output | Supports multi-drop reset buses and mixed-voltage µP interfaces (e.g., 3.3V µP with 5V system rail) without level shifters |
| Guaranteed operation at VCC = 1V | Valid RESET assertion and VOL ≤ 0.3V maintained down to 1V supply - critical for Li-ion battery discharge monitoring |
| Low 1.7µA quiescent current | Enables use in always-on battery-backed systems (e.g., smart meters, wearables) with minimal standby drain |
Applications
| Automotive Engine Control Unit (ECU) | Portable Medical Glucose Monitor |
|---|---|
Use Scenario: Monitors 3.3V microcontroller supply in engine management system exposed to wide temperature swings and load dump transients. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset during cold-crank brownout (<2.2V) and holding reset for 4.375ms after recovery. Use Value: Prevents ECU firmware corruption during cranking; open-drain output interfaces directly to 3.3V µP reset pin with no level shifter needed. | Use Scenario: Ensures safe restart of ARM Cortex-M0+ controller after button-press reset in disposable glucose meter powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Provides manual reset via tactile switch on MR pin and monitors VCC decay to prevent operation below 2.1V battery cutoff. Use Value: 1.7µA ICC extends battery life beyond 2 years; SOT23-5 footprint fits tight PCB area constraints. |
| Industrial PLC I/O Module | Smart Home Hub Power Sequencing |
Use Scenario: Supervises 5V auxiliary rail powering isolated CAN transceivers and ADCs in DIN-rail mounted programmable logic controller. IC Role / Device Role / Timing Role: Detects undervoltage on 5V rail and asserts open-drain RESET to coordinate shutdown of multiple subsystems. Use Value: ±2.5% threshold tolerance ensures consistent trip point across –40°C to +125°C ambient; AEC-Q100 qualification validates reliability in harsh environments. | Use Scenario: Coordinates power-up sequence between 1.8V SoC core and 3.3V Wi-Fi module in battery-backed smart home gateway. IC Role / Device Role / Timing Role: Uses SRT capacitor to generate 5ms reset hold time, ensuring SoC completes boot before enabling RF subsystem. Use Value: Single-component solution replaces discrete RC network and Schmitt trigger; reduces BOM count and layout area by 60%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6316LUK22+T | Same SOT23-5 package, 2.188V threshold, but push-pull active-low RESET output; no MR input; fixed 140ms timeout | Lacks manual reset and adjustable timeout - suitable only for simple power-on reset, not brownout recovery or user-initiated reset | Select when fixed long timeout suffices and MR functionality is unnecessary; avoid where flexible reset timing or field service reset is required |
| TPS3808G18DBVR | 2.175V threshold (±0.5%), 350nA IQ, push-pull active-low RESET, no MR, fixed 200ms timeout, same SOT23-5 | Higher accuracy and lower IQ, but no manual reset or timeout adjustability; not AEC-Q100 qualified | Prefer for ultra-low-power battery applications needing high threshold precision, but not for automotive or user-resettable systems |
Compared with MAX6414UK22+T, MAX6316LUK22+T sacrifices MR and timeout flexibility for simpler implementation, while TPS3808G18DBVR trades configurability for ultra-low IQ and tighter threshold tolerance - neither offers the combined manual reset, capacitor-adjustable timing, and automotive qualification of the MAX6414UK22+T.
Availability
MAX6414UK22+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 MAX6414UK22+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 low-power, capacitor-programmable microprocessor supervisors targeting systems requiring robust voltage monitoring, manual reset capability, and flexible reset timing - especially where space, power, and temperature resilience are critical.
FAQ
What is the exact reset threshold voltage of the MAX6414UK22+T?
The MAX6414UK22+T has a factory-trimmed VCC reset threshold of 2.188V, with ±1.25% accuracy at +25°C and ±2.5% over the full –40°C to +125°C operating range. This value is confirmed by the "22" suffix in the part number per Maxim's Reset Voltages Suffix Table and verified in the Electrical Characteristics table under VTH parameter.
Does the MAX6414UK22+T support manual reset functionality?
Yes, the MAX6414UK22+T includes a dedicated MR (manual reset) input on pin 3. Pulling MR low asserts the active-low RESET output for the full timeout period. An internal 20kΩ pullup resistor allows MR to be left unconnected if manual reset is not required, simplifying design when only power-supply monitoring is needed.
What is the function of the SRT pin on the MAX6414UK22+T?
The SRT pin (pin 4) on the MAX6414UK22+T is a constant-current (240nA) ramp source used to set the reset timeout period. Connecting an external capacitor (CSRT) from SRT to GND determines tRP using tRP = (2.71 × 10⁶) × CSRT + 275µs. For example, a 1500pF capacitor yields 4.375ms typical timeout, enabling precise timing without trimming resistors.
Can the MAX6414UK22+T operate with supply voltages below 2.0V?
Yes, the MAX6414UK22+T operates from VCC = 1.0V to 5.5V and guarantees valid RESET output behavior down to VCC = 1.0V, including VOL ≤ 0.3V at 500µA sink current. This makes it suitable for Li-ion battery-powered systems where supply drops below 2.0V during discharge, unlike many supervisors that fail below 1.8V.
Is the MAX6414UK22+T qualified for automotive applications?
Yes, the MAX6414UK22+T is AEC-Q100 qualified for automotive use. While the base part number does not carry the "/V" suffix, Maxim's Ordering Information confirms that MAX6414UK_ _/V+T variants exist and the entire MAX6412–MAX6420 family is specified from –40°C to +125°C with automotive-grade reliability testing - making MAX6414UK22+T suitable for non-safety-critical automotive modules like infotainment and body control units.
MAX6414UK22+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.188V
- Output:
- Open Drain or Open Collector
- 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
MAX6414UK22+T FAQ
1.How can I place an order for MAX6414UK22+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6414UK22+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 MAX6414UK22+T reliable?
The price and inventory of MAX6414UK22+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6414UK22+T is usually 5 days.
3.What payment methods are accepted for MAX6414UK22+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6414UK22+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6414UK22+T?
MAX6414UK22+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6414UK22+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 MAX6414UK22+T?
For technical support, including MAX6414UK22+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6414UK22+T requirements.
6.How does Aetrix verify that MAX6414UK22+T is sourced from the original manufacturer or authorized distributors?
All MAX6414UK22+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 MAX6414UK22+T meets industry standards.
7.What is the process for return or replacement of MAX6414UK22+T?
All MAX6414UK22+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6414UK22+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 MAX6414UK22+T part is unused and in its original packaging.
Return procedure for MAX6414UK22+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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