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Analog Devices Inc./Maxim Integrated MAX6414UK45+T
- Part No.:
- MAX6414UK45+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6414UK45+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,624
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Product details
Overview
MAX6414UK45+T from Maxim Integrated is a low-power microprocessor supervisor IC with fixed 4.5V VCC reset threshold, manual reset input (MR), and active-low open-drain RESET output. It monitors supply voltage in systems from 1.6V to 5V, asserts reset during brownout or manual trigger, and sustains reset for a capacitor-adjustable timeout period (3.0–5.75ms with 1500pF). It is used in automotive and battery-powered controllers requiring AEC-Q100-compliant voltage supervision.
For engineers reviewing the MAX6414UK45+T datasheet, MAX6414UK45+T pinout, MAX6414UK45+T application, or MAX6414UK45+T equivalent, key selection criteria include its 4.5V fixed threshold accuracy (±2.5% over -40°C to +125°C), 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 embedded designs.
Technical Context
The MAX6414UK45+T implements a precision bandgap-based VCC monitor with factory-trimmed 4.5V threshold (suffix "45" per Table 1: TYP = 4.500V, MIN = 4.388V, MAX = 4.613V) and 4×VTH hysteresis. Its reset timeout is controlled by an internal 240nA current source charging an external capacitor on the SRT pin, with deassertion triggered when the ramp reaches 0.65V.
It features a high-impedance MR input with internal 20kΩ pullup, 1µs minimum pulse width support, and 75ns glitch rejection. The open-drain RESET output supports rail-to-rail sinking up to 3.2mA at VCC ≥ 4.5V and leakage <1.0µA when not asserted - enabling flexible level-shifting across 0–5.5V logic domains without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 4.500V (typ), ±2.5% over -40°C to +125°C - ensures reliable brownout detection at nominal 4.5V rails |
| Quiescent Current | 1.7µA (typ) at VCC ≤ 2.0V - enables multi-year operation in battery-backed systems |
| Reset Timeout Period | 3.00–5.75ms (with 1500pF SRT cap) - configurable reset hold time for diverse µP power-up sequences |
| RESET Output Type | Active-low open-drain - allows wired-OR configuration and interface to 0–5.5V logic supplies |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and industrial environments |
| Supply Voltage Range | 1.0V to 5.5V - guarantees functional reset assertion even during deep brownout conditions |
| MR Input Pullup | 20kΩ internal - eliminates need for external resistor when manual reset is unused |
Pinout & Package
SOT23-5 package (package code U5+2A), 5-pin surface-mount, RoHS-compliant lead-free variant (+T suffix), footprint compatible with JEDEC MO-178AA standard (land pattern 90-0174).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low open-drain reset output | Drives µP reset input low; requires external pullup for logic-high state; sinks up to 3.2mA at VCC ≥ 4.5V |
| 2 - GND | Ground reference | Primary return path for internal comparators and current sources; must be low-impedance for accurate SRT timing |
| 3 - MR | Manual reset input | Active-low trigger; internally pulled up to VCC via 20kΩ; 1µs minimum pulse width; 75ns glitch rejection |
| 4 - SRT | Set reset timeout input | Connects to external timing capacitor; driven by precision 240nA current source; sensitive to stray capacitance/leakage |
| 5 - VCC | Power supply and monitored voltage input | Supplies device and serves as primary monitored rail; reset asserted if VCC falls below 4.5V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-adjustable reset timeout | Enables precise tailoring of reset hold time (275µs to >100ms) using a single external capacitor on SRT |
| Factory-trimmed 4.5V threshold | Eliminates external resistor divider; achieves ±2.5% accuracy across full temperature range without calibration |
| Open-drain RESET with wide voltage tolerance | Supports direct interfacing to µPs operating at 1.8V, 3.3V, or 5V logic without level-shifters or additional passives |
| Guaranteed RESET validity to VCC = 1V | Ensures deterministic reset behavior during severe brownout - critical for fail-safe system recovery |
| AEC-Q100 qualified option | Available in /V automotive-grade variant (MAX6414UK45/V+T), meeting stress testing requirements for automotive applications |
Applications
| Automotive Engine Control Unit (ECU) | Portable Medical Monitor |
|---|---|
Use Scenario: Monitors 5V supply rail in engine control module exposed to wide temperature (-40°C to +125°C) and transient-rich environments. IC Role / Device Role / Timing Role: Supervises VCC and provides capacitor-programmable reset timeout to ensure µP completes boot sequence before releasing reset. Use Value: Prevents erratic ECU operation during cold cranking or load dump events; open-drain output interfaces directly to 5V µP reset pin without level translation. | Use Scenario: Powers on/off sequencing and brownout protection in handheld blood glucose meter with coin-cell backup. IC Role / Device Role / Timing Role: Detects 4.5V main supply collapse and asserts reset until stable; MR pin enables user-initiated recalibration reset. Use Value: 1.7µA quiescent current extends battery life; guaranteed RESET function down to VCC = 1V prevents undefined µP state during final battery discharge. |
| Industrial PLC I/O Module | Battery-Powered Wireless Sensor Node |
Use Scenario: Ensures deterministic startup of ARM Cortex-M based controller after 24V DC-DC converter stabilization. IC Role / Device Role / Timing Role: Monitors regulated 4.5V auxiliary rail; SRT capacitor sets 4.375ms timeout aligned with µP's internal oscillator stabilization time. Use Value: Factory-trimmed threshold removes calibration overhead; SOT23-5 footprint saves PCB area in dense modular I/O designs. | Use Scenario: Supervises Li-ion battery voltage (nominal 3.7V) stepped up to 4.5V for ultra-low-power MCU operation. IC Role / Device Role / Timing Role: Triggers reset when battery voltage drops below 4.5V threshold; MR pin allows firmware-triggered deep-sleep wake-up reset. Use Value: Open-drain RESET interfaces cleanly to MCU's 1.8V I/O domain via 10kΩ pullup; low ICC minimizes self-discharge during multi-month sleep cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6413UK45+T | Active-high push-pull RESET output instead of open-drain; identical threshold, timing, and MR functionality | Requires µP with active-high reset input; no external pullup needed but lacks level-shifting flexibility | Select when µP reset pin expects active-high signal and board layout prohibits external pullup resistor |
| TPS3808G33DBVR | Fixed 3.3V threshold (not 4.5V); 1.8µA ICC; push-pull active-low RESET; no MR input | Designed for 3.3V systems only; lacks manual reset capability and adjustable timeout | Choose only if supervising 3.3V rail and manual reset is unnecessary; not a functional substitute for MAX6414UK45+T's 4.5V monitoring |
Compared with MAX6414UK45+T, MAX6413UK45+T offers identical supervision accuracy and timing but mandates active-high µP reset compatibility, while TPS3808G33DBVR targets lower-voltage systems without manual reset or timeout adjustability - making MAX6414UK45+T uniquely suited for 4.5V automotive and industrial applications requiring flexible reset signaling and user intervention.
Availability
MAX6414UK45+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 MAX6414UK45+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 computing applications.
The MAX6412–MAX6420 family delivers low-power, capacitor-adjustable microprocessor supervisors optimized for robust voltage monitoring in harsh environments - specifically targeting applications where supply stability, reset timing control, and AEC-Q100 compliance are critical.
FAQ
What is the exact reset threshold voltage of MAX6414UK45+T and how is it specified?
The MAX6414UK45+T has a factory-trimmed VCC reset threshold of 4.500V (typical), with a guaranteed range of 4.388V to 4.613V at +25°C and ±2.5% variation over -40°C to +125°C. This value is defined by the "45" suffix per Maxim's Reset Voltages Suffix Table and confirmed in the Electrical Characteristics table under VTH parameter.
Does MAX6414UK45+T support manual reset functionality, and how is it implemented?
Yes, MAX6414UK45+T includes a dedicated MR (manual reset) input on Pin 3. It is active-low, features an internal 20kΩ pullup resistor, accepts minimum 1µs pulses, and rejects glitches shorter than 75ns. When pulled low, it asserts the open-drain RESET output for the full capacitor-programmed timeout period after release.
What package type and footprint does MAX6414UK45+T use, and is it RoHS-compliant?
MAX6414UK45+T uses the SOT23-5 package (outline number 21-0057, land pattern 90-0174) with RoHS-compliant lead-free construction indicated by the "+" in the "+T" suffix. It is a 5-pin surface-mount device with standardized JEDEC MO-178AA dimensions and thermal characteristics validated for multi-layer PCBs.
How is the reset timeout period set on MAX6414UK45+T, and what capacitor value yields ~4.4ms?
The reset timeout on MAX6414UK45+T is set by connecting a capacitor between Pin 4 (SRT) and GND. Using the formula tRP = (2.71 × 10⁶) × CSRT + 275µs, a 1500pF capacitor yields a typical timeout of 4.375ms. Ceramic capacitors with <10nA leakage are recommended for accuracy and stability.
Can MAX6414UK45+T be used in automotive applications, and what qualification does it meet?
Yes, MAX6414UK45+T is available in an AEC-Q100 qualified automotive grade variant (MAX6414UK45/V+T), fully specified from -40°C to +125°C and tested to automotive reliability standards. The standard MAX6414UK45+T shares the same operating range and thermal performance, making it suitable for non-certified automotive subsystems.
MAX6414UK45+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:
- 4.5V
- 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
MAX6414UK45+T FAQ
1.How can I place an order for MAX6414UK45+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6414UK45+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 MAX6414UK45+T reliable?
The price and inventory of MAX6414UK45+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6414UK45+T is usually 5 days.
3.What payment methods are accepted for MAX6414UK45+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6414UK45+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6414UK45+T?
MAX6414UK45+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6414UK45+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 MAX6414UK45+T?
For technical support, including MAX6414UK45+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6414UK45+T requirements.
6.How does Aetrix verify that MAX6414UK45+T is sourced from the original manufacturer or authorized distributors?
All MAX6414UK45+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 MAX6414UK45+T meets industry standards.
7.What is the process for return or replacement of MAX6414UK45+T?
All MAX6414UK45+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6414UK45+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 MAX6414UK45+T part is unused and in its original packaging.
Return procedure for MAX6414UK45+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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