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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Supervisors

Analog Devices Inc./Maxim Integrated MAX6458UKD0B/GH9-T

Name: MAX6458UKD0B/GH9-T
Brand: Analog Devices Inc./Maxim Integrated
SKU: MAX6458UKD0B/GH9-T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MAX6458UKD0B/GH9-T

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Supervisors

Package:: SC-74A, SOT-753

Datasheet:: MAX6458UKD0B/GH9-T.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23-5

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Product details

Overview

MAX6458UKD0B/GH9-T from Maxim Integrated is a dual-threshold, window voltage monitor IC in SOT23-5 package, designed for high-voltage (4V–28V) battery-stack and power-rail supervision. It features two precision comparators (one for undervoltage, one for overvoltage), 5% internal threshold hysteresis, 50µs timeout, open-drain output, and operates across –40°C to +125°C. Used in 5-cell Li+ battery protection circuits to assert fault when input falls below VTH− or exceeds VTH+.

For engineers reviewing the MAX6458UKD0B/GH9-T datasheet, MAX6458UKD0B/GH9-T pinout, MAX6458UKD0B/GH9-T application, or MAX6458UKD0B/GH9-T equivalent, this page delivers verified functional identity, exact SOT23-5 pin mapping, confirmed 5% hysteresis and 50µs timeout behavior, real-world window-detection use cases, and two validated alternative parts with documented technical and application differences.

Technical Context

The MAX6458UKD0B/GH9-T implements a fixed 5% internal hysteresis between rising (VTH+) and falling (VTH−) thresholds-1.228V and 1.167V respectively at +25°C-enabling noise-immune window detection without external feedback. Its single open-drain output asserts low when VIN+ drops below VTH− *or* VIN− exceeds VTH+, and returns high only after both conditions are simultaneously satisfied for ≥50µs.

Unlike the latched MAX6457, the MAX6458UKD0B/GH9-T has no CLEAR input and operates transparently; its IN+ and IN− pins accept externally resistor-divided monitoring voltages up to VCC, while the output supports pull-up to voltages ≤28V independent of VCC-critical for interfacing with higher-voltage logic or MOSFET gate drivers.

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	5% - fixed factory-trimmed hysteresis reduces false triggering in noisy automotive/industrial environments.
Timeout Period	50µs - fast response suitable for transient overvoltage detection; excludes extended 150ms option found in "3"-suffix variants.
Supply Current	3.5µA typical at 12V - enables always-on battery supervision with negligible drain on multibattery systems.
Operating Temperature	–40°C to +125°C - qualified for under-hood automotive, industrial DC-DC converters, and telecom power modules.
Output Type	Open-drain n-channel, 28V-compliant - allows flexible level-shifting via external pull-up to any voltage ≤28V, including isolated control rails.
Input Threshold Accuracy	VTH+ = 1.228V ±2.5%, VTH− = 1.167V ±2.5% - enables precise window setting (e.g., 18.9V–23.1V at 21V rail) using high-impedance dividers.

Pinout & Package

MAX6458UKD0B/GH9-T is housed in a RoHS-compliant 5-pin SOT23 package (outline 21-0057), with 0.95mm pitch, 2.9mm × 1.6mm footprint, and thermal pad omitted. Pin 1 is marked by dot; device orientation follows JEDEC MO-178.

Pin/Terminal	Circuit Role	Design Meaning
1 OUT	Open-drain output	Asserts low during UV or OV fault; requires external pull-up; sinks up to 10mA; compatible with 28V logic rails.
2 GND	Ground reference	Common return for VCC, IN+, IN−, and output sink current; must be low-impedance for accurate threshold sensing.
3 IN+	Undervoltage comparator noninverting input	Accepts resistor-divided monitored voltage (e.g., battery stack); high-impedance (±25nA bias) enables MΩ-scale dividers.
4 IN−	Overvoltage comparator inverting input	Accepts second resistor-divided voltage; common-mode range 0–1.4V; used with IN+ to define window bounds.
5 VCC	Power supply input	4V–28V operation; internal UVLO holds OUT asserted low if VCC drops below 1.5V, ensuring fail-safe behavior.

Key Features

Feature	Design Value
Dual independent comparators	Simultaneous UV and OV detection enables true window monitoring with single output state-no external logic required.
Factory-trimmed 5% hysteresis	Eliminates need for external hysteresis resistors or feedback networks, reducing BOM count and layout sensitivity to noise.
50µs fixed timeout	Guarantees minimum assertion time before output transition, rejecting sub-50µs transients (e.g., switching spikes) without software intervention.
28V-tolerant open-drain output	Permits direct interface to higher-voltage control signals (e.g., 24V PLC I/O or MOSFET gate drivers) without level translators.
–40°C to +125°C operation	Validated performance across full automotive and industrial temperature range-no derating needed for under-hood or factory-floor deployment.

Applications

5-Cell Li+ Battery Stack Supervision	Automotive Power-Rail Monitoring
Use Scenario: Monitoring a 5-cell Li+ battery pack (~18–24V) to prevent deep discharge or overcharge during charging/discharging cycles. IC Role / Device Role / Timing Role: Window comparator that asserts fault when pack voltage falls below 18.9V (UV) or rises above 23.1V (OV), enabling shutdown of DC-DC converter or charger. Use Value: Prevents cell imbalance and thermal runaway by enforcing strict voltage boundaries with 5% hysteresis-no external components beyond R1/R2/R3 divider.	Use Scenario: Supervising 12V or 24V vehicle battery rail for engine control units (ECUs) or ADAS modules exposed to load-dump transients. IC Role / Device Role / Timing Role: High-voltage monitor detecting overvoltage events (>16V) and undervoltage sags (<9V) on main power bus, triggering safe-state entry. Use Value: 50µs timeout rejects ISO 7637-2 pulse 1/2a spikes; 28V output tolerance allows direct drive of 12V/24V watchdog reset lines without level shifters.
Industrial DC-DC Converter Enable Control	Telecom Rectifier Output Monitoring
Use Scenario: Enabling/disabling isolated DC-DC converters in programmable logic controllers (PLCs) based on input rail stability. IC Role / Device Role / Timing Role: Window detector on primary-side 24V input rail, asserting enable signal only when voltage remains within 22–26V window for ≥50µs. Use Value: Eliminates brownout-induced latch-up; 3.5µA quiescent current avoids loading auxiliary bias supplies in energy-constrained designs.	Use Scenario: Monitoring +48V telecom rectifier outputs for compliance with GR-1089 immunity requirements and backup battery switchover. IC Role / Device Role / Timing Role: Dual-threshold supervisor verifying rectifier output stays within ±5% of nominal (45.6–50.4V) before enabling downstream 48V distribution. Use Value: Factory-trimmed 5% hysteresis matches telecom voltage tolerance specs; SOT23-5 footprint minimizes PCB area in dense telecom line cards.

5-Cell Li+ Battery Stack Supervision

Automotive Power-Rail Monitoring

Use Scenario: Monitoring a 5-cell Li+ battery pack (~18–24V) to prevent deep discharge or overcharge during charging/discharging cycles.

IC Role / Device Role / Timing Role: Window comparator that asserts fault when pack voltage falls below 18.9V (UV) or rises above 23.1V (OV), enabling shutdown of DC-DC converter or charger.

Use Value: Prevents cell imbalance and thermal runaway by enforcing strict voltage boundaries with 5% hysteresis-no external components beyond R1/R2/R3 divider.

Use Scenario: Supervising 12V or 24V vehicle battery rail for engine control units (ECUs) or ADAS modules exposed to load-dump transients.

IC Role / Device Role / Timing Role: High-voltage monitor detecting overvoltage events (>16V) and undervoltage sags (<9V) on main power bus, triggering safe-state entry.

Use Value: 50µs timeout rejects ISO 7637-2 pulse 1/2a spikes; 28V output tolerance allows direct drive of 12V/24V watchdog reset lines without level shifters.

Industrial DC-DC Converter Enable Control

Telecom Rectifier Output Monitoring

Use Scenario: Enabling/disabling isolated DC-DC converters in programmable logic controllers (PLCs) based on input rail stability.

IC Role / Device Role / Timing Role: Window detector on primary-side 24V input rail, asserting enable signal only when voltage remains within 22–26V window for ≥50µs.

Use Value: Eliminates brownout-induced latch-up; 3.5µA quiescent current avoids loading auxiliary bias supplies in energy-constrained designs.

Use Scenario: Monitoring +48V telecom rectifier outputs for compliance with GR-1089 immunity requirements and backup battery switchover.

IC Role / Device Role / Timing Role: Dual-threshold supervisor verifying rectifier output stays within ±5% of nominal (45.6–50.4V) before enabling downstream 48V distribution.

Use Value: Factory-trimmed 5% hysteresis matches telecom voltage tolerance specs; SOT23-5 footprint minimizes PCB area in dense telecom line cards.

Equivalent & Alternatives

The following parts are listed as comparable options for similar window voltage monitor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX6458UKD0C-T	8.3% internal hysteresis vs. 5% in MAX6458UKD0B/GH9-T; otherwise identical pinout, timing, and package.	Higher hysteresis better suited for extremely noisy environments (e.g., motor drives), but reduces effective window width by ~1.5%.	Select MAX6458UKD0C-T only if measured noise amplitude exceeds 5% of trip voltage; otherwise MAX6458UKD0B/GH9-T provides optimal noise margin vs. window resolution trade-off.
TLV809E26DBVR	Single-channel 2.63V reset IC with 200ms timeout, SOT23-3 package, no window capability, no adjustable thresholds.	Limited to fixed-threshold undervoltage detection; cannot replace window function without adding external comparator circuitry.	Only viable as drop-in replacement in legacy UV-only designs where window detection is not required; not suitable for MAX6458UKD0B/GH9-T's dual-threshold use cases.

Compared with MAX6458UKD0C-T and TLV809E26DBVR, the MAX6458UKD0B/GH9-T uniquely delivers factory-trimmed 5% hysteresis with dual-comparator window functionality in a 5-pin SOT23-enabling compact, reliable rail supervision without external components or layout compromises.

Availability

MAX6458UKD0B/GH9-T is available at Aetrix Electronics and suitable for 5-cell Li+ battery supervision, automotive power-rail monitoring, and industrial DC-DC converter enable control requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for MAX6458UKD0B/GH9-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 power, sensing, and interface applications, with emphasis on high-reliability industrial and automotive markets.

The MAX6457–MAX6460 family was engineered specifically for high-voltage, low-quiescent-current supervision of battery stacks and unregulated power rails-addressing needs in electric vehicles, energy storage, and ruggedized power systems.

FAQ

What is the exact hysteresis percentage and timeout period for MAX6458UKD0B/GH9-T?

The MAX6458UKD0B/GH9-T features a factory-trimmed 5% internal threshold hysteresis and a fixed 50µs timeout period. These values are confirmed in Table 1 of the MAX6457–MAX6460 datasheet and correspond to the "0B" suffix in the part number. The 5% hysteresis applies between VTH+ (1.228V) and VTH− (1.167V) at +25°C, and the 50µs delay ensures immunity to sub-microsecond transients while maintaining fast fault response. This specification is intrinsic to the MAX6458UKD0B/GH9-T and does not require external configuration.

Does MAX6458UKD0B/GH9-T support window detection with a single output?

Yes, the MAX6458UKD0B/GH9-T implements true window detection using two internal comparators (one for undervoltage, one for overvoltage) and a single open-drain output. The output asserts low when the monitored voltage falls below the lower threshold (VTH−) *or* exceeds the upper threshold (VTH+), and returns high only after the voltage re-enters the window and remains there for ≥50µs. This behavior is explicitly defined in the General Description and Functional Diagram sections of the MAX6457–MAX6460 datasheet and is a core feature of the MAX6458UKD0B/GH9-T variant.

Can MAX6458UKD0B/GH9-T monitor voltages higher than its VCC supply?

No-MAX6458UKD0B/GH9-T inputs (IN+ and IN−) must remain within 0V to VCC, per Absolute Maximum Ratings and Electrical Characteristics. However, its open-drain output can be pulled up to voltages up to 28V, independent of VCC, enabling interface with higher-voltage logic or gate drivers. To monitor voltages >28V, external resistor dividers must scale the input down to fit within the 0–VCC range. The MAX6458UKD0B/GH9-T itself does not support direct high-side sensing above VCC on its inputs.

What is the operating temperature range and supply current of MAX6458UKD0B/GH9-T?

The MAX6458UKD0B/GH9-T is fully specified from –40°C to +125°C and draws 3.5µA typical supply current at 12V (with no load), as stated in the Electrical Characteristics table. This low quiescent current enables continuous supervision in battery-powered equipment such as portable medical devices or remote sensors without significant runtime impact. The device maintains threshold accuracy and timeout stability across the full temperature range, with VTH+ and VTH− drift bounded per the Typical Operating Characteristics plots.

Is MAX6458UKD0B/GH9-T pin-compatible with other MAX6458 variants?

Yes, all MAX6458 variants-including MAX6458UKD0B/GH9-T, MAX6458UKD0A-T, and MAX6458UKD3B-T-are packaged in identical 5-pin SOT23 (U5+1) packages with identical pinouts (OUT, GND, IN+, IN−, VCC). Differences lie solely in factory-trimmed hysteresis (0.5%/5%/8.3%) and timeout (50µs/150ms), which are internal and do not affect pin function or layout. Thus, MAX6458UKD0B/GH9-T can be substituted on the same PCB footprint as other MAX6458UKDxx-T parts, provided system timing and noise immunity requirements align with its 5% hysteresis and 50µs timeout.

MAX6458UKD0B/GH9-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:: 50µs Typical

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-5

MAX6458UKD0B/GH9-T FAQ

1.How can I place an order for MAX6458UKD0B/GH9-T through Aetrix?

Please submit a Request for Quotation (RFQ) for MAX6458UKD0B/GH9-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 MAX6458UKD0B/GH9-T reliable?

The price and inventory of MAX6458UKD0B/GH9-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6458UKD0B/GH9-T is usually 5 days.

3.What payment methods are accepted for MAX6458UKD0B/GH9-T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6458UKD0B/GH9-T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MAX6458UKD0B/GH9-T?

MAX6458UKD0B/GH9-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MAX6458UKD0B/GH9-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 MAX6458UKD0B/GH9-T?

For technical support, including MAX6458UKD0B/GH9-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6458UKD0B/GH9-T requirements.

6.How does Aetrix verify that MAX6458UKD0B/GH9-T is sourced from the original manufacturer or authorized distributors?

All MAX6458UKD0B/GH9-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 MAX6458UKD0B/GH9-T meets industry standards.

7.What is the process for return or replacement of MAX6458UKD0B/GH9-T?

All MAX6458UKD0B/GH9-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6458UKD0B/GH9-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 MAX6458UKD0B/GH9-T part is unused and in its original packaging.

Return procedure for MAX6458UKD0B/GH9-T:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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