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Analog Devices Inc./Maxim Integrated MAX6501UKP125
- Part No.:
- MAX6501UKP125
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Thermostats - Solid State
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6501UKP125.pdf
- Description:
- MICROPOWER TEMPERATURE SWITCH
- Quantity:
- Payment:
- Shipping:
Inventory:1,693
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Product details
Overview
MAX6501UKP125 from Maxim Integrated is a factory-programmed, hot-temperature threshold IC that asserts an active-low open-drain signal when die temperature exceeds +125°C. It operates from +2.7V to +5.5V, consumes 30µA typical supply current, features ±0.5°C (typ) threshold accuracy, and uses pin-selectable 2°C or 10°C hysteresis. Designed for microprocessor reset signaling in high-speed computing thermal protection.
For engineers reviewing the MAX6501UKP125 datasheet, MAX6501UKP125 pinout, MAX6501UKP125 application, or MAX6501UKP125 equivalent, this page delivers verified functional identity, SOT23-5 package mapping, trip-point-specific electrical behavior, and direct substitution guidance for overtemperature monitoring systems requiring fail-safe shutdown at +125°C.
Technical Context
The MAX6501UKP125 implements a fully integrated comparator architecture with dual on-chip temperature-dependent voltage references-one positive and one negative temperature coefficient-whose intersection defines the +125°C trip point. Internal power-on reset ensures output stability for 50µs at startup.
Hysteresis is selected via the HYST pin: grounded for 2°C, tied to VCC for 10°C. The open-drain TOVER output requires an external 100kΩ pullup and supports voltage levels up to 7V, enabling interfacing with higher-voltage logic domains independent of VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Threshold | +125°C hot-trip point; asserts output when die temperature exceeds this factory-programmed value. |
| Supply Voltage Range | +2.7V to +5.5V; compatible with 3.3V and 5V logic rails without level-shifting. |
| Supply Current | 30µA typical; enables micropower operation in battery-backed or always-on thermal monitoring. |
| Threshold Accuracy | ±0.5°C (typ), ±6°C (max); ensures precise overtemperature detection critical for CPU/GPU thermal safety margins. |
| Hysteresis Options | PIN-selectable 2°C (HYST = GND) or 10°C (HYST = VCC); prevents output oscillation near trip point during slow thermal transients. |
| Output Type | Active-low open-drain TOVER; sinks ≥1.2mA at VOL ≤ 0.3V, directly compatible with µP reset inputs. |
| Package | SOT23-5; compact footprint with Pin 2 providing lowest thermal resistance to die for accurate junction sensing. |
Pinout & Package
SOT23-5 package with exposed thermal pad not electrically connected; Pin 2 provides lowest thermal resistance path to die and must be connected to ground plane for optimal thermal response.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | GND | Ground reference; both pins must be shorted externally and connected to PCB ground near device for minimal thermal impedance. |
| 3 | HYST | Hysteresis select input; CMOS-compatible; must be driven to GND (2°C hysteresis) or VCC (10°C hysteresis); floating prohibited. |
| 4 | VCC | Positive supply input; accepts +2.7V to +5.5V; decoupling capacitor recommended within 1cm. |
| 5 | TOVER | Active-low open-drain output; sinks current when TDIE > +125°C; requires external 100kΩ pullup to logic rail (≤7V). |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed +125°C threshold | Eliminates calibration effort and external sensor components in high-temperature shutdown circuits. |
| 30µA supply current | Enables integration into low-power systems such as portable instrumentation or standby-mode controllers without measurable self-heating impact. |
| Open-drain output with 7V tolerance | Allows direct interface to 3.3V/5V µP reset inputs while supporting higher-voltage alarm buses without level shifters. |
| Pin-selectable hysteresis | Permits system-level optimization: tight 2°C control for precision thermal regulation or wide 10°C margin for noisy environments. |
| Integrated power-on reset | Guarantees TOVER remains high for 50µs at power-up, preventing false resets during supply ramp. |
Applications
| Microprocessor Thermal Reset | Fan Control Enable |
|---|---|
Use Scenario: Monitoring CPU die temperature in high-performance servers to trigger immediate reset before thermal damage occurs. IC Role / Device Role / Timing Role: Temperature switch asserting active-low signal to µP reset pin upon exceeding +125°C. Use Value: Prevents permanent silicon degradation by initiating controlled shutdown within 100ms of threshold breach, leveraging <2°C thermal lag in SOT23 package. |
Use Scenario: Activating cooling fans only when ambient or component temperature reaches critical +125°C threshold. IC Role / Device Role / Timing Role: Open-drain output driving fan controller enable line through pullup resistor. Use Value: Reduces system power consumption by eliminating continuous fan operation; eliminates need for external comparator or ADC. |
| Overtemperature Alarm System | Industrial Power Supply Protection |
Use Scenario: Generating audible/visual alarms in industrial enclosures where internal temperature must not exceed +125°C. IC Role / Device Role / Timing Role: TOVER output wired-OR'd with other thermal switches to drive alarm logic or LED driver. Use Value: Provides deterministic, single-event fault detection without software intervention; immune to firmware crashes. |
Use Scenario: Safeguarding DC-DC converters in telecom power supplies against thermal runaway under overload conditions. IC Role / Device Role / Timing Role: Direct connection of TOVER to enable/disable circuitry or latch-off mechanism. Use Value: Achieves <10ms response from thermal excursion to shutdown, meeting IEC 62368-1 thermal hazard mitigation requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar temperature switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6502UKP125 | Push-pull active-high output instead of open-drain active-low; identical +125°C trip, supply range, and accuracy. | Requires no external pullup; drives logic-high fan enable or interrupt lines directly; incompatible with µP reset inputs expecting active-low assertion. | Select MAX6502UKP125 when interfacing with active-high control logic or when minimizing external components is prioritized over µP reset compatibility. |
| LM20BIMAX/NOPB | Analog temperature sensor (output voltage proportional to temp); no built-in comparator or programmable trip; requires external comparator and reference. | Provides continuous temperature readout rather than binary overtemp flag; supports adjustable thresholds via external resistors but adds design complexity. | Choose LM20BIMAX/NOPB only when system requires analog temperature telemetry alongside overtemp protection; not a drop-in replacement. |
Compared with MAX6501UKP125, MAX6502UKP125 offers simplified board layout at the cost of µP reset compatibility, while LM20BIMAX/NOPB trades integration for flexibility-neither matches the exact function, pinout, or application scope of the MAX6501UKP125 in dedicated hot-trip reset roles.
Availability
MAX6501UKP125 is available at Aetrix Electronics and suitable for high-reliability microprocessor thermal reset, industrial power supply protection, and overtemperature alarm systems requiring stable component supply across extended temperature ranges (-55°C to +125°C operating).
Supply support for MAX6501UKP125 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 in industrial, computing, and communications markets.
The MAX6501–MAX6504 family delivers highly integrated, low-cost temperature switches optimized for fail-safe thermal monitoring in space-constrained, micropower systems-specifically targeting µP reset, fan control, and alarm generation without external components.
FAQ
What is the exact temperature trip point of the MAX6501UKP125?
The MAX6501UKP125 has a factory-programmed hot-temperature threshold of +125°C. When the die temperature exceeds this value, the TOVER output transitions low. This trip point is trimmed during manufacturing and specified with ±0.5°C typical accuracy across the full operating range. The "P125" suffix explicitly denotes the +125°C positive (hot) trip configuration.
Can the MAX6501UKP125 operate from a 3.3V supply?
Yes, the MAX6501UKP125 operates from +2.7V to +5.5V, making it fully compatible with standard 3.3V logic rails. At VCC = 3.3V, the device maintains its 30µA typical supply current, ±0.5°C threshold accuracy, and guaranteed output sink capability (≥1.2mA at VOL ≤ 0.3V). No derating or external adjustments are required.
How is hysteresis configured on the MAX6501UKP125?
Hysteresis on the MAX6501UKP125 is configured via the HYST pin: connect HYST to GND for 2°C hysteresis or to VCC for 10°C hysteresis. The actual hysteresis value depends on the programmed trip point and is validated per the Typical Operating Characteristics graph in the datasheet. Leaving HYST floating increases supply current and must be avoided.
Is the MAX6501UKP125 pin-compatible with other devices in the MAX6501–MAX6504 family?
Yes, all MAX6501–MAX6504 variants-including MAX6501UKP125-share identical SOT23-5 pinout and package dimensions. However, output type differs: MAX6501/MAX6503 use open-drain TOVER/TUNDER, while MAX6502/MAX6504 use push-pull outputs. Swapping MAX6501UKP125 for MAX6502UKP125 requires circuit modification due to active-low vs. active-high logic polarity.
Does the MAX6501UKP125 require external components to function?
No, the MAX6501UKP125 requires no external components for basic operation. It integrates the temperature-sensing element, reference generators, comparator, and hysteresis control. Only an external 100kΩ pullup resistor on the TOVER pin is needed to interface with standard µP reset inputs-a minimal, non-critical component not affecting core functionality.
MAX6501UKP125 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Trip Temperature Threshold:
- Hot
- Switching Temperature:
- 125°C
- Accuracy:
- ±6°C
- Current - Output (Max):
- 20mA
- Output Type:
- Open Drain
- Output:
- Active Low
- Output Function:
- /OverTemp
- Selectable Hysteresis:
- Yes
- Features:
- Selectable Hysteresis
- Voltage - Supply:
- 2.7 V ~ 5.5 V
- Current - Supply:
- 30µA
- Operating Temperature:
- -55°C ~ 125°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- SOT-23-5
MAX6501UKP125 FAQ
1.How can I place an order for MAX6501UKP125 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6501UKP125 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 MAX6501UKP125 reliable?
The price and inventory of MAX6501UKP125 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6501UKP125 is usually 5 days.
3.What payment methods are accepted for MAX6501UKP125?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6501UKP125 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6501UKP125?
MAX6501UKP125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6501UKP125 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 MAX6501UKP125?
For technical support, including MAX6501UKP125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6501UKP125 requirements.
6.How does Aetrix verify that MAX6501UKP125 is sourced from the original manufacturer or authorized distributors?
All MAX6501UKP125 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 MAX6501UKP125 meets industry standards.
7.What is the process for return or replacement of MAX6501UKP125?
All MAX6501UKP125 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6501UKP125, 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 MAX6501UKP125 part is unused and in its original packaging.
Return procedure for MAX6501UKP125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6501UKP125 Tags
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LM26CIM5-RPA/NOPB
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Analog Devices Inc./Maxim Integrated
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