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Analog Devices Inc./Maxim Integrated MAX6457UKD0C+T
- Part No.:
- MAX6457UKD0C+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6457UKD0C+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:5,250
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Product details
Overview
The MAX6457UKD0C+T from Analog Devices is a single-channel, high-voltage undervoltage/overvoltage monitor IC with 8.3% internal threshold hysteresis and fixed 50µs timeout period, operating from 4V to 28V supply. It features a precision 2.25V ±2.5% internal reference, 3.5µA typical supply current at 12V, open-drain 28V-compliant output, and latched operation via CLEAR input - used in multicell Li+ battery stack undervoltage lockout and automotive power-rail supervision.
For engineers reviewing the MAX6457UKD0C+T datasheet, MAX6457UKD0C+T pinout, MAX6457UKD0C+T application, or MAX6457UKD0C+T equivalent, this page delivers verified electrical parameters, SOT23-5 package mapping, latch behavior under overvoltage, hysteresis-dependent trip thresholds (VTH+ = 1.093–1.151V, VTH− = 1.071–1.151V), and design-meaningful timing and leakage specs for robust system-level functional safety implementation.
Technical Context
The MAX6457UKD0C+T implements a single comparator with precision bandgap reference and factory-trimmed 8.3% hysteresis, enabling noise-immune voltage monitoring without external feedback. Its CLEAR input provides digital latch control: high state latches OUT high after VIN+ exceeds VTH+, while low state enables transparent mode.
It operates across −40°C to +125°C with undervoltage lockout down to VCC = 1.5V and supports adjustable trip thresholds via two external resistors. The 50µs timeout ensures fast response to sustained over/undervoltage events while rejecting sub-microsecond transients.
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. |
| Threshold Hysteresis | 8.3% - reduces false triggering in noisy automotive/industrial environments; VTH+ = 1.093–1.151V, VTH− = 1.071–1.151V (−40°C to +125°C). |
| Timeout Period | 50µs - guarantees deterministic output assertion delay after valid threshold crossing; immune to <50µs transients. |
| Supply Current | 3.5µA typ at 12V - enables always-on monitoring in battery-backed systems with multi-year runtime. |
| Output Type | Open-drain n-channel, 28V-compliant - allows pullup to any voltage ≤28V, supporting mixed-voltage system interfacing. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive and industrial power-conversion applications. |
| Reference Voltage | 2.25V ±2.5% - stable internal reference eliminates need for external precision reference in trip-point setting. |
Pinout & Package
MAX6457UKD0C+T is housed in a lead(Pb)-free, RoHS-compliant 5-pin SOT23 package (package code U5+1, outline 21-0057), with thermal resistance θJA = 255.9°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Open-drain monitor output | Asserts low when VIN+ drops below VTH− or VCC falls below 4V; goes high after 50µs timeout when VIN+ exceeds VTH+. |
| 2 - GND | Ground reference | Common return for all internal circuitry and external resistor divider; must be low-impedance for accurate threshold tracking. |
| 3 - IN+ | Undervoltage monitor threshold input | Noninverting input for comparator; connected to resistor divider from monitored rail to set VTRIP; high-impedance (±25nA bias current). |
| 4 - CLEAR | Latch control input | Drives high to latch OUT high after overvoltage event; must be low at power-up; connects to GND when unused. |
| 5 - VCC | Power supply input | Accepts 4V–28V; maintains correct undervoltage lockout state down to 1.5V; powers internal reference and comparator. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed hysteresis | 8.3% - eliminates external hysteresis network, saving PCB area and component count in space-constrained modules. |
| Internal 2.25V reference | ±2.5% accuracy over −40°C to +125°C - enables precise, temperature-stable trip-point programming without external references. |
| Low 3.5µA supply current | At 12V - extends battery life in portable equipment and enables continuous monitoring in energy-sensitive IoT nodes. |
| 28V-compliant open-drain output | Sinks up to 10mA - interfaces directly with 3.3V/5V/12V logic and drives external MOSFET gates or SCR triggers without level shifters. |
| Functional safety support | Enables system-level ASIL-B compliance - deterministic 50µs timeout, latch capability, and AEC-Q100-aligned design facilitate ISO 26262 analysis. |
Applications
| Automotive Power-Rail Supervision | Multicell Li+ Battery Stack Monitoring |
|---|---|
|
Use Scenario: Real-time monitoring of 21V nominal 5-cell Li+ battery voltage during charge/discharge cycles in EV auxiliary systems. IC Role / Device Role / Timing Role: Undervoltage lockout (UVLO) supervisor with latched output that disables DC-DC converter upon VBAT < 18.9V. Use Value: Prevents deep discharge damage using factory-trimmed 8.3% hysteresis to reject ripple-induced false trips at high ambient temperatures. |
Use Scenario: Detecting overvoltage conditions (>23.1V) in telecom rectifier outputs to protect downstream 48V DC distribution. IC Role / Device Role / Timing Role: Overvoltage shutdown controller with 50µs timeout ensuring rapid response before capacitor stress limits are exceeded. Use Value: Enables fail-safe shutdown via P-channel MOSFET gate control using open-drain output pulled to 28V, independent of VCC. |
| Industrial PLC Power Sequencing | Notebook System Power Management |
|
Use Scenario: Verifying stable 24V input to programmable logic controllers before enabling FPGA configuration and I/O drivers. IC Role / Device Role / Timing Role: Reset supervisor with CLEAR-latched output ensuring processor reset remains asserted until full rail stabilization. Use Value: Guarantees clean startup sequence using internal 2.25V reference and 50µs timeout, eliminating external RC timing components. |
Use Scenario: Monitoring main 19V adapter input in ultrabooks to initiate graceful shutdown when AC power fails or sags. IC Role / Device Role / Timing Role: Low-power voltage detector with 3.5µA ICC enabling always-on supervision without impacting standby battery life. Use Value: Supports >1000-hour battery backup via ultra-low quiescent current and −40°C to +125°C operation across chassis temperature zones. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV809E33DBVR | Fixed 3.3V threshold, no hysteresis trim, 140ms reset timeout, SOT23-3 package | Limited to single-rail 3.3V systems; lacks adjustable trip and high-voltage capability | Select when cost-sensitive, fixed-threshold 3.3V monitoring suffices and 28V operation is unnecessary |
| MAX6315US31D3+T | 3.1V fixed threshold, 150ms timeout, 5-pin SOT23, no CLEAR latch or hysteresis option | Designed for microprocessor reset only; no overvoltage detection or programmable window capability | Choose for legacy MCU reset where latch-free, long-delay reset is required and rail voltage is stable |
Compared with TLV809E33DBVR and MAX6315US31D3+T, the MAX6457UKD0C+T uniquely combines factory-trimmed 8.3% hysteresis, 4V–28V operation, latched CLEAR control, and 50µs timeout - making it the only option for ruggedized, adjustable, high-voltage supervisory functions in automotive and industrial designs.
Availability
MAX6457UKD0C+T is available at Aetrix Electronics and suitable for automotive power-rail supervision, multicell Li+ battery stack monitoring, and industrial PLC power sequencing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6457UKD0C+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 automotive, industrial, communications, and consumer markets since 1965.
The MAX6457UKD0C+T belongs to the MAX6457–MAX6460 family of high-voltage, low-current voltage monitors designed specifically for functional-safety-critical power supervision in harsh environments - emphasizing precision, noise immunity, and extended temperature reliability.
FAQ
What is the exact trip threshold voltage range for MAX6457UKD0C+T over temperature?
The MAX6457UKD0C+T has factory-trimmed 8.3% hysteresis, yielding VTH+ = 1.093–1.151V and VTH− = 1.071–1.151V across −40°C to +125°C. These values are specified in the Electrical Characteristics table under "MAX645_U_D_C" row and reflect actual measured thresholds, not calculated approximations.
Does MAX6457UKD0C+T support overvoltage detection only, or both over- and undervoltage?
The MAX6457UKD0C+T supports both overvoltage and undervoltage detection via a single comparator with configurable latch behavior. When VIN+ rises above VTH+, OUT goes high after 50µs timeout; when VIN+ falls below VTH−, OUT asserts low - enabling dual-direction monitoring with one device.
How does the CLEAR input function in MAX6457UKD0C+T, and what happens if left unconnected?
In MAX6457UKD0C+T, CLEAR must be driven low at power-up to avoid undefined latch state. If left floating, unpredictable output behavior may occur. When used, driving CLEAR high latches OUT high after an overvoltage event; driving CLEAR low restores transparent operation. Connect CLEAR to GND when unused.
Can MAX6457UKD0C+T monitor voltages higher than its VCC supply, such as 48V rails?
No - the MAX6457UKD0C+T's IN+ input is rated for 0V to VCC only. To monitor 48V, use a resistor divider to scale the voltage into the 0–VCC range. The device's open-drain output, however, can be pulled up to 28V regardless of VCC, enabling interface with higher-voltage logic.
Is MAX6457UKD0C+T AEC-Q100 qualified, and what grade does it meet?
The MAX6457UKD0C+T is not AEC-Q100 qualified; only the MAX6459UTA/V+ variant carries AEC-Q100 qualification. MAX6457UKD0C+T is specified for −40°C to +125°C operation and meets industrial reliability standards but lacks formal automotive qualification documentation.
MAX6457UKD0C+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
MAX6457UKD0C+T FAQ
1.How can I place an order for MAX6457UKD0C+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6457UKD0C+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 MAX6457UKD0C+T reliable?
The price and inventory of MAX6457UKD0C+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6457UKD0C+T is usually 5 days.
3.What payment methods are accepted for MAX6457UKD0C+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6457UKD0C+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6457UKD0C+T?
MAX6457UKD0C+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6457UKD0C+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 MAX6457UKD0C+T?
For technical support, including MAX6457UKD0C+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6457UKD0C+T requirements.
6.How does Aetrix verify that MAX6457UKD0C+T is sourced from the original manufacturer or authorized distributors?
All MAX6457UKD0C+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 MAX6457UKD0C+T meets industry standards.
7.What is the process for return or replacement of MAX6457UKD0C+T?
All MAX6457UKD0C+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6457UKD0C+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 MAX6457UKD0C+T part is unused and in its original packaging.
Return procedure for MAX6457UKD0C+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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