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Analog Devices Inc./Maxim Integrated MAX6458UKD3A-T
- Part No.:
- MAX6458UKD3A-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6458UKD3A-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,254
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Product details
Overview
MAX6458UKD3A-T from Maxim Integrated is a dual-threshold, window voltage monitor IC for high-voltage systems, featuring 0.5% internal hysteresis, 150ms reset timeout, 4V–28V supply range, 3.5µA typical supply current at 12V, and a single open-drain output compliant to 28V. It enables precise undervoltage/overvoltage detection in multicell Li+ battery stacks and automotive power rails.
For engineers reviewing the MAX6458UKD3A-T datasheet, MAX6458UKD3A-T pinout, MAX6458UKD3A-T application, or MAX6458UKD3A-T equivalent, key selection criteria include its fixed 150ms timeout for transient-immune overvoltage protection, factory-trimmed 0.5% hysteresis, SOT23-5 package compatibility, and support for adjustable window thresholds via two external resistors.
Technical Context
The MAX6458UKD3A-T integrates two precision comparators-one for undervoltage (IN+) and one for overvoltage (IN−) detection-sharing a single open-drain output that asserts low when input falls outside the user-defined voltage window. Its internal 2.25V ±2.5% bandgap reference enables accurate threshold setting without external references.
It operates with a fixed 150ms timeout period (D3 option), requiring the monitored voltage to remain within the window for the full duration before deasserting the output. Internal hysteresis of 0.5% reduces noise-induced chatter, and the device remains functional down to VCC = 1.5V in undervoltage lockout mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4V to 28V - supports direct monitoring of 5-cell Li+ stacks (~21V nominal) and 12V/24V automotive rails without level shifting. |
| Supply Current (TYP) | 3.5µA at 12V - enables always-on monitoring in battery-powered systems with multi-year runtime. |
| Timeout Period | 150ms minimum - provides immunity to short transients (e.g., load-dump spikes) before asserting fault condition. |
| Threshold Hysteresis | 0.5% of VTH+ - factory-trimmed, eliminates need for external hysteresis network and improves noise margin. |
| Output Type | Open-drain n-channel, 28V-compliant - allows pull-up to any voltage ≤28V, enabling interface with 3.3V/5V logic or higher-voltage control lines. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive and industrial environments. |
| Reference Voltage | 2.25V ±2.5% - stable internal reference used with external resistor dividers to set precise trip points. |
Pinout & Package
MAX6458UKD3A-T is housed in a 5-pin SOT23 package (package code U5+1), with 0.95mm pitch, 2.9mm × 1.6mm footprint, and exposed pad optional per Maxim land pattern 90-0174.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Open-drain monitor output | Asserts low when IN+ < VTH− OR IN− > VTH+; requires external pull-up; sinks up to 20mA; compatible with 28V pull-up. |
| 2 - GND | Ground reference | Primary return path for internal circuitry and comparator inputs; must be low-impedance for accurate threshold operation. |
| 3 - IN+ | Undervoltage threshold input | Noninverting input for UV comparator; connected to lower resistor of voltage divider; accepts 0–VCC common-mode range. |
| 4 - IN− | Overvoltage threshold input | Inverting input for OV comparator; connected to upper resistor of voltage divider; same common-mode range as IN+. |
| 5 - VCC | Power supply input | 4V–28V supply; powers internal reference and comparators; device maintains UVLO state down to 1.5V. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent comparators | One dedicated to undervoltage (IN+), one to overvoltage (IN−), enabling true window detection with single output logic. |
| Factory-trimmed hysteresis | 0.5% hysteresis (D3A variant) is laser-trimmed on-die - eliminates external feedback components and ensures consistent noise immunity. |
| Extended timeout option | 150ms minimum assertion delay prevents false triggering during brief supply disturbances common in automotive and industrial systems. |
| High-voltage open-drain output | OUT rated for 28V sink - allows direct interface with higher-voltage control buses or optocoupler drivers without level-shifting circuitry. |
| Low quiescent current | 3.5µA typical at 12V - enables continuous monitoring in energy-constrained applications such as e-bikes and portable medical devices. |
Applications
| Automotive Power Rail Monitoring | Multicell Battery Stack Protection |
|---|---|
|
Use Scenario: Monitoring 24V vehicle battery rail for overvoltage during alternator regulation faults or load dump events. IC Role / Device Role / Timing Role: Window comparator detecting excursions beyond 23.1V (OV) and below 18.9V (UV) with 150ms holdoff before fault assertion. Use Value: Prevents false shutdowns from <100µs transients while ensuring rapid response to sustained overvoltage conditions exceeding AEC-Q100 stress limits. |
Use Scenario: Supervising 5-cell Li+ battery stack (~21V nominal) in electric scooters to prevent cell overcharge and deep discharge. IC Role / Device Role / Timing Role: Configured as window detector with VTRIPLOW = 18.9V and VTRIPHIGH = 23.1V using R1/R2/R3 divider network. Use Value: Enables single-IC protection against both overvoltage (cell imbalance) and undervoltage (over-discharge), reducing BOM count vs. discrete solutions. |
| Notebook System Power Sequencing | Industrial DC-DC Converter Enable Control |
|
Use Scenario: Validating main 19V adapter input before enabling CPU core voltage regulators in ultrabooks. IC Role / Device Role / Timing Role: Acts as power-good window monitor with 150ms debounce; asserts system reset if input drops below 17V or exceeds 21V. Use Value: Ensures clean power sequencing by preventing regulator enable until stable input is confirmed, avoiding brownout-induced firmware corruption. |
Use Scenario: Enabling isolated 48V-to-12V DC-DC converter only when input bus remains within safe operating window (42–54V). IC Role / Device Role / Timing Role: Drives enable pin of DC-DC controller via open-drain output; uses external 12V pull-up for logic-level compatibility. Use Value: Eliminates need for external voltage supervisor IC or microcontroller polling, simplifying safety-critical power architecture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar window voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6458UKD0A-T | Same 0.5% hysteresis but 50µs timeout instead of 150ms. | Lacks transient immunity; suitable for fast-response applications where noise is minimal. | Select when system requires immediate fault reporting and has low-noise power rails. |
| TLV809E26DBZR | Single-channel 2.63V reset IC with 200ms timeout; no window capability; 1.8–6V supply only. | Cannot perform simultaneous UV/OV detection; limited to low-voltage domains. | Use only for simple undervoltage reset in sub-6V systems; not a functional replacement for window monitoring. |
Compared with MAX6458UKD0A-T and TLV809E26DBZR, the MAX6458UKD3A-T uniquely delivers factory-trimmed 0.5% hysteresis combined with 150ms noise-immune timeout in a 5-pin SOT23, making it the only option among the three capable of robust window supervision across 4V–28V systems.
Availability
MAX6458UKD3A-T is available at Aetrix Electronics and suitable for automotive power rail monitoring, multicell battery stack protection, notebook power sequencing, and industrial DC-DC converter enable control requiring stable component supply across extended temperature and high-voltage operating conditions.
Supply support for MAX6458UKD3A-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, with emphasis on low-power, high-reliability performance.
The MAX6457–MAX6460 family was engineered specifically for high-voltage, low-current supervision in space-constrained systems - delivering accurate window detection, configurable timing, and robust operation from −40°C to +125°C.
FAQ
What is the timeout behavior of the MAX6458UKD3A-T?
The MAX6458UKD3A-T features a fixed 150ms minimum timeout period (D3 option). The OUT pin remains asserted low until the monitored voltage stays continuously within the programmed window for at least 150ms. This delay prevents false triggering from short-duration transients like load dumps or switching noise, and is factory-trimmed for consistency across temperature and voltage.
How do I configure the MAX6458UKD3A-T for window detection?
To configure the MAX6458UKD3A-T for window detection, connect two external resistors between VCC and GND to form a voltage divider, with the midpoint feeding IN+ (for undervoltage threshold) and IN− (for overvoltage threshold). Use the equations VTRIPLOW = VTH− × (R1 + R2 + R3)/R2 and VTRIPHIGH = VTH+ × (R1 + R2 + R3)/R3, where VTH− = 1.167V and VTH+ = 1.228V for the D3A variant. The MAX6458UKD3A-T then asserts OUT low if either threshold is violated.
Does the MAX6458UKD3A-T require an external reference?
No, the MAX6458UKD3A-T does not require an external reference. It includes an internal 2.25V ±2.5% precision bandgap reference used internally to compare against the divided input voltages at IN+ and IN−. External resistors set the actual trip thresholds relative to this reference, eliminating the need for additional reference ICs or trimming components.
What is the maximum voltage the OUT pin can tolerate when pulled up?
The OUT pin of the MAX6458UKD3A-T is rated for 28V compliance. It can be pulled up to any voltage up to +28V, independent of VCC - enabling direct interfacing with 3.3V, 5V, 12V, or 24V logic systems. However, the pull-up voltage must never exceed +28V, and the sink current must remain within 20mA absolute maximum rating.
Is the MAX6458UKD3A-T AEC-Q100 qualified?
No, the MAX6458UKD3A-T is not AEC-Q100 qualified. Only the MAX6459UTA/V-T and MAX6459UT_/V+ variants in the same family carry AEC-Q100 qualification. The MAX6458UKD3A-T is specified for −40°C to +125°C operation and widely used in automotive *applications*, but lacks formal AEC-Q100 certification - verify qualification status with official Maxim/Analog Devices documentation for safety-critical deployments.
MAX6458UKD3A-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:
- Adjustable/Selectable
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 90ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6458UKD3A-T FAQ
1.How can I place an order for MAX6458UKD3A-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6458UKD3A-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 MAX6458UKD3A-T reliable?
The price and inventory of MAX6458UKD3A-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6458UKD3A-T is usually 5 days.
3.What payment methods are accepted for MAX6458UKD3A-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6458UKD3A-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6458UKD3A-T?
MAX6458UKD3A-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6458UKD3A-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 MAX6458UKD3A-T?
For technical support, including MAX6458UKD3A-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6458UKD3A-T requirements.
6.How does Aetrix verify that MAX6458UKD3A-T is sourced from the original manufacturer or authorized distributors?
All MAX6458UKD3A-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 MAX6458UKD3A-T meets industry standards.
7.What is the process for return or replacement of MAX6458UKD3A-T?
All MAX6458UKD3A-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6458UKD3A-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 MAX6458UKD3A-T part is unused and in its original packaging.
Return procedure for MAX6458UKD3A-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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