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Analog Devices Inc./Maxim Integrated MAX6457UKD3A+T
- Part No.:
- MAX6457UKD3A+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6457UKD3A+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:9,726
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Product details
Overview
MAX6457UKD3A+T from Analog Devices is a single-channel, high-voltage undervoltage/overvoltage monitor IC with latched open-drain output, 150ms reset timeout, 0.5% internal threshold hysteresis, and operation across 4V–28V supply range. It features precision 1.228V bandgap reference, CLEAR input for latch control, and is used in battery-stack undervoltage lockout and automotive power-rail monitoring.
For engineers reviewing the MAX6457UKD3A+T datasheet, MAX6457UKD3A+T pinout, MAX6457UKD3A+T application, or MAX6457UKD3A+T equivalent, this page delivers verified electrical parameters, SOT23-5 package layout, functional timing behavior, and validated alternative options for industrial and automotive voltage supervision designs.
Technical Context
The MAX6457UKD3A+T implements a single comparator with internal 1.228V reference and factory-trimmed 0.5% hysteresis (VTH+ = 1.228V, VTH− = 1.222V), enabling stable trip-point discrimination under noise. Its CLEAR input provides digital latch control: high level latches OUT high after overvoltage detection, while low level enables transparent mode.
This variant uses the D3 suffix, specifying 150ms minimum reset timeout delay - not the default 50μs - making it suitable for transient-immune overvoltage shutdown where brief spikes must be ignored. The device asserts OUT low when VIN+ drops below VTH− or VCC falls below 4V, and releases OUT after 150ms only when VIN+ exceeds VTH+ and remains stable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4V to 28V - supports direct monitoring of multicell Li+ stacks (e.g., 5-cell ≈ 21V nominal) without external regulators. |
| Threshold Voltage (VTH+) | 1.228V ±0.033V at +25°C - precise internal reference sets trip point via external resistor divider; temperature drift < ±15mV from −40°C to +125°C. |
| Timeout Period | 150ms minimum - ensures output remains asserted during short transients; prevents false resets in noisy automotive or industrial environments. |
| Supply Current | 3.5μA typical at 12V - ultra-low quiescent current extends battery life in always-on monitoring applications. |
| Output Type | Open-drain n-channel, 28V-compliant - allows pull-up to any voltage ≤28V, enabling level-shifted interface with 3.3V/5V logic or higher-voltage control rails. |
| Hysteresis | 0.5% of VTH+ - reduces chatter near threshold; corresponds to ~6mV window between VTH+ and VTH− at room temperature. |
| Operating Temperature | −40°C to +125°C - fully specified for under-hood automotive, industrial power supplies, and telecom equipment. |
Pinout & Package
MAX6457UKD3A+T is housed in a lead(Pb)-free, RoHS-compliant 5-pin SOT23 package (package code U5+1, outline 21-0057), footprint-compatible with JEDEC MO-178AB, thermal resistance θJA = 255.9°C/W on multilayer board.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Open-drain output; asserts low during undervoltage (VIN+ < VTH−) or overvoltage (if latched); requires external pull-up; sinks up to 10mA. |
| 2 | GND | Ground reference for all internal circuitry and comparator inputs; must be low-impedance connection to system ground plane. |
| 3 | IN+ | Noninverting input for undervoltage/overvoltage detection; accepts divided VCC or external monitored voltage (0–VCC range). |
| 4 | CLEAR | Digital latch control: high = latch OUT high after overvoltage event; low = transparent mode; must be low at power-up. |
| 5 | VCC | Power supply input; powers internal reference, comparator, and logic; operates from 4V to 28V; UVLO active down to 1.5V. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed hysteresis | 0.5% VTH+ (≈6mV) - eliminates need for external feedback resistors and improves repeatability across temperature and unit variance. |
| Latched output with CLEAR | Digital control pin enables persistent fault indication until manually cleared - critical for safety-critical undervoltage lockout in automotive ECUs. |
| 150ms timeout option | Guaranteed minimum assertion time prevents nuisance tripping from sub-150ms transients - validated per AEC-Q100 transient immunity requirements. |
| 28V-compliant open-drain output | Supports pull-up to voltages up to 28V independent of VCC - simplifies interfacing with higher-voltage gate drivers or PLC I/O modules. |
| Ultra-low ICC (3.5μA typ) | Enables continuous monitoring in energy-constrained systems such as battery-backed telemetry nodes or e-bike BMS standby circuits. |
Applications
| Automotive Power-Rail Supervision | Multicell Battery Stack Undervoltage Lockout |
|---|---|
Use Scenario: Monitoring 12V/24V vehicle battery rail for brownout conditions during cold cranking or alternator failure. IC Role / Device Role / Timing Role: MAX6457UKD3A+T acts as primary undervoltage detector; its 150ms timeout ignores cranking dips while asserting reset to microcontroller upon sustained drop below 10.5V. Use Value: Prevents MCU corruption during engine start by ensuring reset remains active >150ms - matching ISO 16750-2 pulse 4a duration. |
Use Scenario: Protecting 5-cell Li+ battery stack (nominal 21V) from deep discharge in portable medical devices or drones. IC Role / Device Role / Timing Role: MAX6457UKD3A+T monitors stack voltage via resistor divider; triggers shutdown signal to DC-DC converter when cell voltage falls below 3.6V/cell. Use Value: 0.5% hysteresis avoids oscillation near 18.9V trip point; 150ms hold-off prevents false shutdown during load surges. |
| Industrial PLC Input Power Monitoring | Telecom DC Power Shelf Supervision |
Use Scenario: Verifying stable 24V DC input to programmable logic controller before enabling I/O modules and fieldbus communication. IC Role / Device Role / Timing Role: MAX6457UKD3A+T serves as system enable supervisor; its CLEAR pin allows remote reset via PLC firmware after fault recovery. Use Value: Open-drain output pulls up to 24V logic rail directly - no level shifter needed; 4V–28V operation covers full industrial supply tolerance. |
Use Scenario: Detecting undervoltage on −48V telecom rectifier outputs to initiate graceful shutdown of line cards before backup batteries deplete. IC Role / Device Role / Timing Role: MAX6457UKD3A+T monitors scaled −48V rail using external resistor network; latched output holds alarm until operator acknowledges fault. Use Value: 125°C rating ensures reliability in sealed, fanless telecom cabinets; 3.5μA supply current minimizes loading on backup battery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV809E29DBZR | Fixed 2.93V threshold, no adjustable hysteresis, 200ms timeout, SOT23-3 package, 1.8V–6V supply only. | Only suitable for low-voltage logic rails (e.g., 3.3V MCU supply); cannot monitor 24V systems or battery stacks directly. | Select TLV809E29DBZR only for cost-sensitive, fixed-threshold 3.3V/5V applications where external scaling is impractical. |
| MAX6315US29D3+T | Same 150ms timeout and SOT23-5 package, but fixed 2.93V threshold, no CLEAR pin, 1.6V–5.5V supply range. | Lacks adjustable trip point and latch control - limited to simple reset generation on low-voltage supplies. | Choose MAX6315US29D3+T when replacing legacy fixed-reset ICs in 3.3V systems, but not for high-voltage or configurable supervision. |
Compared with TLV809E29DBZR and MAX6315US29D3+T, the MAX6457UKD3A+T uniquely supports 4V–28V operation, user-adjustable thresholds via resistor dividers, and programmable latch behavior - making it the only option among the three qualified for automotive and industrial high-voltage monitoring.
Availability
MAX6457UKD3A+T is available at Aetrix Electronics and suitable for automotive power-rail supervision, multicell battery stack undervoltage lockout, and industrial PLC input power monitoring requiring stable component supply across extended temperature and high-reliability environments.
Supply support for MAX6457UKD3A+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 MAX6457UKD3A+T belongs to the MAX6457–MAX6460 family of high-voltage, low-quiescent-current voltage supervisors, designed specifically for robust power-rail monitoring in harsh environments including automotive under-hood and industrial control systems.
FAQ
What is the exact timeout period of the MAX6457UKD3A+T?
The MAX6457UKD3A+T has a guaranteed minimum reset timeout period of 150ms. This is the time from when the monitored input (IN+) rises above the upper threshold (VTH+) until the open-drain output (OUT) transitions from low to high. Typical values range from 150ms to 210ms across temperature, per the datasheet's Electrical Characteristics table.
Does the MAX6457UKD3A+T support overvoltage detection?
Yes, the MAX6457UKD3A+T supports both undervoltage and overvoltage detection through its single comparator architecture and CLEAR input. When IN+ exceeds VTH+, driving CLEAR high latches OUT high - providing an overvoltage fault flag that persists until manually cleared. This dual-mode capability is confirmed in the General Description and Functional Diagram sections of the datasheet.
What is the function of the CLEAR pin on the MAX6457UKD3A+T?
The CLEAR pin on the MAX6457UKD3A+T controls latch behavior: when driven high, it latches the OUT pin high after an overvoltage event (IN+ > VTH+); when held low, the device operates in transparent mode where OUT follows input state with 150ms delay. The pin must be low at power-up; connecting it to GND is required if unused.
Can the MAX6457UKD3A+T monitor voltages higher than its VCC supply?
No - the MAX6457UKD3A+T's IN+ input is rated for 0V to VCC only. To monitor voltages exceeding VCC (e.g., 48V bus), a resistor divider must scale the input down to within the 0–VCC range. However, its open-drain OUT can be pulled up to voltages up to 28V regardless of VCC, enabling level-shifted signaling.
Is the MAX6457UKD3A+T AEC-Q100 qualified?
No - only the MAX6459UTA/V+ and MAX6459UTA/V-T variants in the same family are explicitly AEC-Q100 qualified per the Benefits and Features section. The MAX6457UKD3A+T is specified for −40°C to +125°C and widely used in automotive applications, but it does not carry formal AEC-Q100 certification.
MAX6457UKD3A+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:
- 90ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6457UKD3A+T FAQ
1.How can I place an order for MAX6457UKD3A+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6457UKD3A+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 MAX6457UKD3A+T reliable?
The price and inventory of MAX6457UKD3A+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6457UKD3A+T is usually 5 days.
3.What payment methods are accepted for MAX6457UKD3A+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6457UKD3A+T transactions.
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4.How is shipping managed for MAX6457UKD3A+T?
MAX6457UKD3A+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6457UKD3A+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 MAX6457UKD3A+T?
For technical support, including MAX6457UKD3A+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6457UKD3A+T requirements.
6.How does Aetrix verify that MAX6457UKD3A+T is sourced from the original manufacturer or authorized distributors?
All MAX6457UKD3A+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 MAX6457UKD3A+T meets industry standards.
7.What is the process for return or replacement of MAX6457UKD3A+T?
All MAX6457UKD3A+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6457UKD3A+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 MAX6457UKD3A+T part is unused and in its original packaging.
Return procedure for MAX6457UKD3A+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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