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Analog Devices Inc./Maxim Integrated MAX6457UKD0B+T
- Part No.:
- MAX6457UKD0B+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6457UKD0B+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:7,653
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Product details
Overview
The MAX6457UKD0B+T from Analog Devices is a single-channel, high-voltage undervoltage/overvoltage monitor IC with 5% internal threshold hysteresis, 50µs timeout period, and latched output via CLEAR input. It operates from 4V to 28V supply, draws only 3.5µA typical current at 12V, features a 2.25V ±2.5% internal reference, and delivers a 28V-compliant open-drain n-channel output. It is used in multicell Li+ battery-stack power management for undervoltage lockout in industrial and automotive equipment.
For engineers reviewing the MAX6457UKD0B+T datasheet, MAX6457UKD0B+T pinout, MAX6457UKD0B+T application, or MAX6457UKD0B+T equivalent, key selection criteria include its fixed 5% hysteresis option, 50µs response time, SOT23-5 package compatibility, latch control logic, and operation across –40°C to +125°C.
Technical Context
The MAX6457UKD0B+T implements a precision bandgap reference (2.25V ±2.5%) feeding a low-offset comparator with programmable trip thresholds set by external resistors. Its internal 5% hysteresis eliminates need for external feedback networks in noise-prone environments.
It features a digital CLEAR input that enables latched overvoltage detection: when IN+ exceeds VTH+, driving CLEAR high holds OUT high until manually toggled; CLEAR must be low at power-up. The device asserts OUT low for VCC < 4V or during undervoltage events, and supports transparent mode when CLEAR is grounded.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4V to 28V - powers directly from high-voltage rails like 5-cell Li+ stacks (~21V nominal) without external regulators. |
| Supply Current | 3.5µA typ at 12V - enables ultra-low-power monitoring in always-on battery systems. |
| Threshold Hysteresis | 5% - reduces false triggering near trip points in electrically noisy automotive or industrial environments. |
| Timeout Period | 50µs - ensures rapid fault response for transient overvoltage/undervoltage events. |
| Output Type | Open-drain n-channel, 28V-compliant - allows pull-up to any voltage ≤28V, independent of VCC. |
| Operating Temperature | –40°C to +125°C - fully specified for under-hood automotive and industrial embedded use. |
| Reference Voltage | 2.25V ±2.5% - stable internal reference enables accurate resistor-divider-based trip setting. |
Pinout & Package
MAX6457UKD0B+T is housed in a RoHS-compliant 5-pin SOT23 package (package code U5+1), with 0.95mm pitch, 2.9mm × 1.6mm footprint, and thermal resistance θJA = 255.9°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Open-drain monitor output | Asserts low for VCC < 4V or VIN+ < VTH−; goes high after 50µs when VIN+ > VTH+; requires external pullup. |
| 2 - GND | Ground reference | Common return path for internal reference, comparator, and output stage; connects to system ground plane. |
| 3 - IN+ | Undervoltage monitor threshold input | Noninverting input for comparator; accepts resistor-divider voltage from monitored rail (e.g., battery stack). |
| 4 - CLEAR | Latch control input | Drives high to latch OUT high after overvoltage event; must be low at power-up; connect to GND if unused. |
| 5 - VCC | Supply voltage input | Accepts 4V–28V; powers internal reference and comparator; OUT remains asserted low down to 1.5V VCC. |
Key Features
| Feature | Design Value |
|---|---|
| Internal 2.25V reference | ±2.5% accuracy over –40°C to +125°C enables precise, temperature-stable trip-point setting without external references. |
| 5% factory-trimmed hysteresis | Eliminates need for external hysteresis resistors and simplifies PCB layout while ensuring noise immunity in harsh EMI environments. |
| Latched CLEAR input | Allows persistent fault indication until manually reset-critical for safety-critical shutdown sequences in automotive and industrial systems. |
| 28V-compliant open-drain output | Permits pull-up to higher voltages (e.g., 24V system rail) than VCC, enabling flexible interface with diverse logic families and power domains. |
| Ultra-low 3.5µA supply current | Minimizes standby power draw in battery-powered equipment, extending operational life without compromising monitoring fidelity. |
Applications
| Automotive Battery Monitoring | Industrial DC-DC Converter UVLO |
|---|---|
Use Scenario: Monitoring 5-cell Li+ battery stack (~21V nominal) in EV auxiliary systems or ADAS modules. IC Role / Device Role / Timing Role: Undervoltage lockout (UVLO) detector that disables DC-DC converter when stack voltage drops below 18.9V. Use Value: Prevents brownout-induced MCU resets and protects downstream electronics using factory-trimmed 5% hysteresis to reject load-dump transients. | Use Scenario: Enabling/disabling isolated 24V-to-3.3V DC-DC converters in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: High-voltage supervisor asserting reset signal to converter enable pin upon input undervoltage. Use Value: Ensures clean power sequencing with 50µs response and latched fault reporting-no spurious restarts during line sags. |
| Telecom Power Shelf Supervision | Notebook Embedded Power Management |
Use Scenario: Monitoring –48V backup supply rails in telecom base station power shelves. IC Role / Device Role / Timing Role: Overvoltage protector that shuts off pass MOSFET when input exceeds 52V threshold. Use Value: Uses CLEAR-latched mode to hold shutdown until service intervention, preventing automatic recovery during sustained overvoltage faults. | Use Scenario: Supervising main battery voltage in ruggedized notebooks operating in wide ambient temperatures. IC Role / Device Role / Timing Role: Single-supply voltage monitor interfacing directly to battery pack via resistor divider. Use Value: Leverages 2.25V internal reference and SOT23-5 footprint to minimize BOM count and PCB area in space-constrained designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV809E33DBZR | Fixed 3.3V threshold, no hysteresis trim, 140ms reset timeout, SOT23-3 package | Only suitable for fixed 3.3V rail monitoring; lacks adjustable trip, latch, or high-voltage capability | Select when cost-sensitive, fixed-threshold, low-voltage (≤6V) supervision suffices and PCB space is extremely constrained. |
| MAX6326UR29D3+T | 2.93V fixed threshold, 140ms timeout, no CLEAR latch, 1.8–5.5V supply range, SOT23-3 | Designed for low-voltage microprocessor reset; incompatible with >5.5V supplies or adjustable thresholds | Choose only for legacy 3.3V/5V digital systems requiring minimal footprint and no high-voltage support. |
Compared with TLV809E33DBZR and MAX6326UR29D3+T, the MAX6457UKD0B+T uniquely supports 4V–28V operation, user-adjustable trip points via resistors, factory-trimmed 5% hysteresis, and latched fault reporting-making it the sole fit for high-voltage, field-configurable, safety-aware monitoring.
Availability
MAX6457UKD0B+T is available at Aetrix Electronics and suitable for automotive battery monitoring, industrial DC-DC converter UVLO, and telecom power shelf supervision requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6457UKD0B+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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The MAX6457UKD0B+T belongs to the MAX6457–MAX6460 family of high-voltage, low-current voltage monitors designed specifically for robust, adjustable power-rail supervision in harsh environments including automotive under-hood and industrial control systems.
FAQ
What is the exact hysteresis percentage and timeout period configured in MAX6457UKD0B+T?
The MAX6457UKD0B+T is factory-trimmed for 5% internal threshold hysteresis and a 50µs timeout period, as indicated by the "0B" suffix per Table 1 in the datasheet. This configuration provides fast response with moderate noise immunity-ideal for applications where rapid fault detection is prioritized over extended transient rejection.
How does the CLEAR input function in MAX6457UKD0B+T, and what happens if it's left unconnected?
In MAX6457UKD0B+T, the CLEAR input controls latched vs. transparent operation: driving CLEAR high latches OUT high after an overvoltage event; driving CLEAR low enables continuous monitoring. If left unconnected, CLEAR floats high, causing unpredictable latch behavior. The datasheet mandates connecting CLEAR to GND when unused to ensure reliable transparent-mode operation.
Can MAX6457UKD0B+T monitor voltages higher than its VCC supply, such as a 24V rail while powered from 12V?
No-MAX6457UKD0B+T's IN+ input must remain within 0V to VCC per Absolute Maximum Ratings. However, its open-drain OUT can be pulled up to voltages up to 28V regardless of VCC, enabling interface with higher-voltage logic. To monitor >VCC rails, use a resistor divider to scale the input voltage into the 0–VCC range before applying to IN+.
What is the maximum sink current capability of the MAX6457UKD0B+T output, and how does it vary with temperature?
The MAX6457UKD0B+T output can sink up to 10mA continuously, with typical VOL = 0.4V at 1mA and –40°C to +125°C. Output short-circuit sink current (ISC) is guaranteed ≥10mA across full temperature range, as verified in Electrical Characteristics table. Derating is not required up to 125°C junction temperature.
Is MAX6457UKD0B+T qualified for automotive applications, and what is its AEC-Q100 status?
MAX6457UKD0B+T is not AEC-Q100 qualified. Only the MAX6459UTA/V+ variant in the same family carries AEC-Q100 Grade 0 qualification. MAX6457UKD0B+T is rated for –40°C to +125°C operation and widely used in industrial and commercial automotive-adjacent systems, but formal automotive qualification applies exclusively to designated /V parts.
MAX6457UKD0B+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:
- Adjustable/Selectable
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 50µs Typical
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6457UKD0B+T FAQ
1.How can I place an order for MAX6457UKD0B+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6457UKD0B+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 MAX6457UKD0B+T reliable?
The price and inventory of MAX6457UKD0B+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6457UKD0B+T is usually 5 days.
3.What payment methods are accepted for MAX6457UKD0B+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6457UKD0B+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6457UKD0B+T?
MAX6457UKD0B+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6457UKD0B+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 MAX6457UKD0B+T?
For technical support, including MAX6457UKD0B+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6457UKD0B+T requirements.
6.How does Aetrix verify that MAX6457UKD0B+T is sourced from the original manufacturer or authorized distributors?
All MAX6457UKD0B+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 MAX6457UKD0B+T meets industry standards.
7.What is the process for return or replacement of MAX6457UKD0B+T?
All MAX6457UKD0B+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6457UKD0B+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 MAX6457UKD0B+T part is unused and in its original packaging.
Return procedure for MAX6457UKD0B+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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