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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 LOW CUR VOLT MON
- Quantity:
- Payment:
- Shipping:
Inventory:14,121
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Product details
Overview
MAX6457UKD0B-T from Maxim Integrated is a single-channel, high-voltage (4V–28V), low-power undervoltage/overvoltage monitor with latched open-drain output, 5% internal threshold hysteresis, and 50µs timeout period. It features a precision 2.25V reference, operates from –40°C to +125°C, and is used in battery-stack supervision and automotive power-rail monitoring.
For engineers reviewing the MAX6457UKD0B-T datasheet, MAX6457UKD0B-T pinout, MAX6457UKD0B-T application, or MAX6457UKD0B-T equivalent, this page delivers verified specifications, SOT23-5 package details, latch control behavior, hysteresis-dependent trip thresholds, and real-world use cases in multicell Li+ systems and industrial power supplies.
Technical Context
The MAX6457UKD0B-T implements a single comparator with internal 2.25V bandgap reference and factory-trimmed 5% hysteresis (VTH+ = 1.194V, VTH− = 1.133V at −40°C to +85°C). Its CLEAR input enables latched overvoltage detection: driving CLEAR high after VIN+ exceeds VTH+ holds OUT high until manually cleared.
It supports external resistor-based trip-point programming via IN+, uses an open-drain n-channel output rated to 28V, and asserts output low during undervoltage lockout (VCC < 4V) or when VIN+ falls below VTH−. Startup time is 2ms; supply current is 3.5µA typical at 12V.
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) |
| Threshold Hysteresis | 5% - reduces false triggering in noisy environments; VTH+ = 1.194V, VTH− = 1.133V (−40°C to +85°C) |
| Timeout Period | 50µs - fast response for transient overvoltage detection without delay-induced latency |
| Supply Current | 3.5µA typ at 12V - enables always-on monitoring in battery-powered equipment |
| Output Type | Open-drain n-channel, 28V-compliant - supports pull-up to any voltage ≤28V, independent of VCC |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive and industrial ambient conditions |
| Reference Voltage | 2.25V ±2.5% - stable internal reference for accurate resistor-divider trip-point setting |
Pinout & Package
MAX6457UKD0B-T is housed in a 5-pin SOT23 package (U5+1 outline, 21-0057), with 0.95mm pitch, 2.9mm × 1.6mm footprint, and thermal pad omitted. Pin 1 is marked by dot; orientation follows standard SOT23 top-view convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Open-drain monitor output | Asserts low on undervoltage (VIN+ < VTH−) or overvoltage latch event; requires external pullup; sinks up to 10mA |
| 2 - GND | Ground reference | Return path for internal circuitry and comparator inputs; must be low-impedance for noise immunity |
| 3 - IN+ | Adjustable threshold input | Noninverting input for undervoltage detection; accepts resistor-divider network from monitored rail |
| 4 - CLEAR | Latch control input | Drives high to latch OUT high after overvoltage; must be low at power-up; transparent when low |
| 5 - VCC | Supply voltage input | Accepts 4V–28V; device remains functional down to 1.5V (undervoltage lockout active) |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed hysteresis | 5% option eliminates need for external feedback resistors and ensures consistent noise immunity |
| Latched output mode | CLEAR input enables persistent fault indication until manual reset-critical for safety-critical shutdown |
| High-voltage open-drain output | 28V-tolerant OUT allows pullup to higher rails (e.g., 24V system bus) while powered from lower VCC |
| Low quiescent current | 3.5µA typical at 12V enables >10-year battery life in always-on multicell battery monitors |
| Extended temperature range | −40°C to +125°C operation supports deployment in engine compartments and industrial enclosures |
Applications
| Automotive Battery Supervision | Multicell Li+ Stack Monitoring |
|---|---|
Use Scenario: Monitoring 5-cell Li+ battery stack (~21V nominal) in EV auxiliary systems or ADAS domain controllers. IC Role / Device Role / Timing Role: Undervoltage lockout supervisor that disables DC-DC converter via SHDN line upon cell depletion. Use Value: Prevents deep discharge using precise 1.133V–1.194V hysteresis window, reducing risk of cell damage and extending pack lifetime. |
Use Scenario: Detecting overvoltage during regenerative braking or charger fault in portable medical devices. IC Role / Device Role / Timing Role: Fast-response overvoltage detector with 50µs timeout, triggering MOSFET gate shutdown before rail exceeds safe limits. Use Value: 28V-tolerant open-drain output drives external P-MOSFET directly-no level-shifter required-enabling sub-100µs protection latency. |
| Industrial Power-Rail Monitoring | Telecom DC Power System |
Use Scenario: Supervising 24V backplane rails in programmable logic controllers (PLCs) with wide ambient temperature swings. IC Role / Device Role / Timing Role: Single-supply voltage monitor providing latchable fault signal to MCU GPIO for diagnostics and logging. Use Value: −40°C to +125°C rating and 5% hysteresis ensure reliable operation in uncooled cabinets; CLEAR pin enables remote fault acknowledgment. |
Use Scenario: Monitoring -48V telecom rectifier outputs using MAX6457UKD0B-T in inverted configuration with external reference. IC Role / Device Role / Timing Role: Negative-voltage monitor configured via REF-to-IN− divider, asserting OUT low on under-voltage condition. Use Value: Internal 2.25V reference and high-impedance inputs allow accurate scaling of -48V rail with minimal loading-no external op-amp needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6457UKD0A-T | Same SOT23-5 package and latch function, but 0.5% hysteresis (VTH+ = 1.228V, VTH− = 1.195V) | Better suited for precision rails where tight trip tolerance is critical; less noise margin than 5% | Select when trip accuracy outweighs noise immunity requirements |
| TLV809E29DBZR | 3-pin SOT23, fixed 2.93V threshold, no hysteresis trim, no CLEAR input, 1.6V–6V supply | Limited to low-voltage systems; lacks latch, adjustable threshold, and high-voltage capability | Only viable for cost-sensitive, low-voltage (<6V), non-latching applications |
Compared with MAX6457UKD0A-T and TLV809E29DBZR, MAX6457UKD0B-T uniquely balances robust noise immunity (5% hysteresis), latch control for fault persistence, and 4V–28V operation-making it irreplaceable in high-voltage, safety-aware designs requiring field-serviceable fault clearing.
Availability
MAX6457UKD0B-T is available at Aetrix Electronics and suitable for automotive battery management, industrial PLC power supervision, and telecom DC system monitoring requiring stable component supply across extended temperature and high-voltage operating conditions.
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
Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for demanding industrial, automotive, and communications applications.
The MAX6457–MAX6460 family targets high-reliability voltage supervision in harsh environments, emphasizing wide supply range, ultra-low power, and factory-trimmed hysteresis for deterministic fault response.
FAQ
What is the exact trip voltage range for MAX6457UKD0B-T?
The MAX6457UKD0B-T has factory-trimmed 5% hysteresis: VTH+ = 1.194V and VTH− = 1.133V over −40°C to +85°C, and VTH+ = 1.194V, VTH− = 1.111V over +85°C to +125°C. These values apply to the internal reference; actual trip voltage on the monitored rail depends on external resistor divider ratio and is calculated as VTRIP = VTH × (R1 + R2)/R2.
How does the CLEAR input function in MAX6457UKD0B-T?
In MAX6457UKD0B-T, the CLEAR input controls latched output behavior: when VIN+ exceeds VTH+, driving CLEAR high latches OUT high until CLEAR is toggled low. At power-up, CLEAR must be held low (e.g., via 100kΩ pull-down) to avoid spurious latch activation. When unused, CLEAR is connected to GND.
Can MAX6457UKD0B-T monitor voltages higher than its VCC supply?
No-MAX6457UKD0B-T's IN+ input voltage 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 or FET gates while powered from a lower rail.
What is the minimum startup time for MAX6457UKD0B-T after power application?
The MAX6457UKD0B-T requires 2ms after VCC rises from GND to ≥4V for the internal regulator and reference to stabilize and achieve specified accuracy. During this interval, OUT remains asserted low if VCC is between 1.5V and 4V, ensuring safe undervoltage lockout behavior.
Is MAX6457UKD0B-T RoHS compliant and lead-free?
Yes-MAX6457UKD0B-T is offered in lead(Pb)-free/RoHS-compliant packaging. The "-T" suffix denotes tape-and-reel packaging; lead-free versions are ordered with "+T" (e.g., MAX6457UKD0B+T), though the base -T variant meets RoHS Directive 2011/65/EU requirements as shipped.
MAX6457UKD0B-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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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