My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6414UK18+T
- Part No.:
- MAX6414UK18+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6414UK18+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,259
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6414UK18+T from Maxim Integrated is a low-power microprocessor supervisor IC with fixed 1.8V 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). Operating from -40°C to +125°C, it draws only 1.7µA at 2.0V.
For engineers reviewing the MAX6414UK18+T datasheet, MAX6414UK18+T pinout, MAX6414UK18+T application, or MAX6414UK18+T equivalent, key selection criteria include its 1.8V fixed threshold accuracy (±2.5% over temperature), guaranteed RESET validity down to VCC = 1V, open-drain output compatibility with mixed-voltage µP interfaces, and AEC-Q100-qualified automotive variants.
Technical Context
The MAX6414UK18+T implements a precision bandgap-based voltage comparator for VCC monitoring against a factory-trimmed 1.8V threshold (±2.5% over -40°C to +125°C), with hysteresis of 4×VTH (≈7.2mV). Its reset timeout is generated by a 240nA current source charging an external capacitor on SRT to a 0.65V internal reference.
It features a high-impedance MR input with internal 20kΩ pullup, 1µs minimum pulse width, and 75ns glitch rejection. The open-drain RESET output supports sink currents up to 3.2mA at VCC ≥ 4.5V and tolerates voltages up to +6.0V on the RESET line-enabling direct interfacing with 3.3V or 5V µP reset inputs without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 1.800V ±2.5% over -40°C to +125°C - ensures reliable brownout detection across automotive/industrial temperature range |
| Reset Timeout Period | 3.00–5.75ms (CSRT = 1500pF) - externally adjustable via capacitor for µP-specific reset hold time compliance |
| Supply Current | 1.7µA (typ) at VCC ≤ 2.0V - enables multi-year operation in coin-cell–powered portable equipment |
| RESET Output Type | Active-low open-drain - allows wired-OR configuration and interface with µPs requiring different logic-high supply rails |
| Operating Temperature | -40°C to +125°C - fully specified for under-hood automotive and industrial control applications |
| VCC Range | 1.0V to 5.5V - guarantees valid RESET assertion even during deep brownout conditions |
| MR Input Logic | Pull-low active with 20kΩ internal pullup - eliminates need for external resistor when unused; supports momentary switch interface |
Pinout & Package
SOT23-5 package (U5+2A outline), 5-pin surface-mount, RoHS-compliant lead-free (+T suffix), thermal resistance θJA = 255.9°C/W (multi-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low open-drain reset output | Drives µP reset input low; requires external pullup; sinks up to 3.2mA; tolerant to 6.0V |
| 2 - GND | Ground reference | Common return path for all internal circuitry and external capacitor (SRT) |
| 3 - MR | Manual reset input | Logic-low assertion forces reset; internal 20kΩ pullup enables switch-only interface |
| 4 - SRT | Set reset timeout input | Connects to external timing capacitor; 240nA constant-current ramp source sets timeout period |
| 5 - VCC | Supply voltage and monitored rail | Power input and primary voltage monitor; reset asserted if VCC falls below 1.8V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 1.8V VCC threshold | Factory-laser-trimmed for ±2.5% accuracy over full temperature range-no calibration required in production |
| Capacitor-adjustable timeout | Supports 0.275ms to >100ms timeout via single external capacitor-eliminates need for multiple part numbers |
| Open-drain RESET output | Enables direct connection to 3.3V or 5V µP reset pins without level shifters or additional components |
| Low quiescent current | 1.7µA typical at 2.0V-extends battery life in portable medical instruments and IoT edge sensors |
| Guaranteed RESET validity to VCC = 1V | Ensures deterministic reset behavior during deep undervoltage events before system shutdown |
Applications
| Battery-Powered Portable Equipment | Automotive Body Control Module |
|---|---|
Use Scenario: Monitoring Li-ion battery voltage in handheld diagnostic tools to prevent firmware corruption during discharge. IC Role / Device Role / Timing Role: Supervises main 3.3V rail; asserts open-drain RESET to ARM Cortex-M0+ MCU until battery recovers above 1.8V. Use Value: Prevents erratic execution during brownout by holding MCU in reset until stable supply returns-no software intervention needed. | Use Scenario: Ensuring safe startup of door module microcontroller after vehicle ignition cycle. IC Role / Device Role / Timing Role: Monitors 5V system rail; provides 4.375ms reset pulse (CSRT = 1500pF) to meet AUTOSAR BSW timing requirements. Use Value: Guarantees deterministic µP initialization across -40°C to +125°C ambient-critical for ASIL-B functional safety compliance. |
| Industrial Sensor Node | Medical Infusion Pump Controller |
Use Scenario: Detecting undervoltage in isolated 24V-to-3.3V DC-DC converter powering wireless sensor transceiver. IC Role / Device Role / Timing Role: Acts as secondary supervisor on regulated 3.3V output; MR pin tied to watchdog timer output for fail-safe recovery. Use Value: Combines power-rail monitoring and hardware watchdog reset in one 5-pin SOT23-reducing BOM count and PCB area. | Use Scenario: Securing microcontroller reset during AC/DC adapter brownout in hospital-grade infusion pumps. IC Role / Device Role / Timing Role: Monitors 5V auxiliary rail; open-drain RESET pulled to 5V logic rail ensures clean reset signal despite varying load transients. Use Value: Eliminates risk of partial reset or latch-up due to noise coupling-meets IEC 60601-1 EMI immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6414UK18-T | Same electrical specs but leaded (Pb) packaging; no RoHS compliance | Not suitable for EU/China RoHS-regulated medical or consumer products | Select MAX6414UK18+T for new designs requiring lead-free compliance and traceability |
| TPS3808G18DBVR | 1.8V fixed threshold, push-pull RESET, 35µA ICC (vs. 1.7µA), same SOT23-5 | Lacks open-drain flexibility; higher current draw limits ultra-low-power use cases | Choose TPS3808G18DBVR only if push-pull output and TI supply chain preference outweigh quiescent current penalty |
Compared with MAX6414UK18-T, the +T variant ensures RoHS compliance and long-term supply continuity; versus TPS3808G18DBVR, MAX6414UK18+T delivers 20× lower quiescent current and open-drain interoperability-critical for battery longevity and mixed-voltage system integration.
Availability
MAX6414UK18+T is available at Aetrix Electronics and suitable for battery-powered portable equipment, automotive body control modules, and industrial sensor nodes requiring stable component supply across extended temperature ranges and strict environmental compliance.
Supply support for MAX6414UK18+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 was engineered specifically for ultra-low-power microprocessor supervision in space-constrained, thermally harsh environments-emphasizing accuracy, flexibility, and reliability over wide voltage and temperature ranges.
FAQ
What is the exact reset threshold voltage for MAX6414UK18+T?
The MAX6414UK18+T has a factory-trimmed VCC reset threshold of 1.800V, with ±1.25% accuracy at +25°C and ±2.5% over the full operating temperature range (-40°C to +125°C). This value is laser-trimmed during production and confirmed in the Electrical Characteristics table of the official datasheet. The '18' suffix in MAX6414UK18+T explicitly denotes the 1.8V nominal threshold per Maxim's Suffix Table.
Does MAX6414UK18+T support dual-voltage monitoring?
No, MAX6414UK18+T does not support dual-voltage monitoring. It is a single-threshold supervisor with a fixed 1.8V VCC monitor and manual reset input (MR). Dual-voltage capability requires models like MAX6418/MAX6419/MAX6420, which integrate both a fixed threshold and an adjustable RESET IN input. The MAX6414UK18+T datasheet explicitly lists "-" under RESET IN in the Selector Guide, confirming absence of this feature.
What capacitor value sets a 4.375ms reset timeout for MAX6414UK18+T?
A 1500pF capacitor on the SRT pin sets a nominal 4.375ms reset timeout for MAX6414UK18+T, as specified in the Electrical Characteristics table (tRP = 4.375ms, CSRT = 1500pF). The relationship follows tRP = (2.71 × 10⁶) × CSRT + 275µs, where CSRT is in farads. For 1500pF (1.5 × 10⁻⁹ F), calculation yields ≈4.375ms-matching the typical value in the datasheet.
Can MAX6414UK18+T operate with VCC below 1.8V?
Yes, MAX6414UK18+T operates with VCC as low as 1.0V and guarantees valid RESET output down to VCC = 1.0V. However, reset assertion occurs only when VCC falls *below* the 1.8V threshold. Below 1.0V, functionality is not specified. The device remains powered and functional down to 1.0V, enabling robust brownout detection even during severe undervoltage events prior to complete system collapse.
Is MAX6414UK18+T qualified for automotive applications?
The base MAX6414UK18+T is not AEC-Q100 qualified; however, automotive-grade versions exist with '/V' suffix (e.g., MAX6414UK18/V+T). These variants undergo additional stress testing and screening per AEC-Q100 Rev H and are rated for automotive temperature range (-40°C to +125°C). Always verify ordering code suffixes and consult Maxim's official Automotive Products page for qualification status of specific part numbers.
MAX6414UK18+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:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.8V
- 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
MAX6414UK18+T FAQ
1.How can I place an order for MAX6414UK18+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6414UK18+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 MAX6414UK18+T reliable?
The price and inventory of MAX6414UK18+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6414UK18+T is usually 5 days.
3.What payment methods are accepted for MAX6414UK18+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6414UK18+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6414UK18+T?
MAX6414UK18+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6414UK18+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 MAX6414UK18+T?
For technical support, including MAX6414UK18+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6414UK18+T requirements.
6.How does Aetrix verify that MAX6414UK18+T is sourced from the original manufacturer or authorized distributors?
All MAX6414UK18+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 MAX6414UK18+T meets industry standards.
7.What is the process for return or replacement of MAX6414UK18+T?
All MAX6414UK18+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6414UK18+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 MAX6414UK18+T part is unused and in its original packaging.
Return procedure for MAX6414UK18+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6414UK18+T Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
