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Analog Devices Inc./Maxim Integrated MAX6501UKP120-T
- Part No.:
- MAX6501UKP120-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Thermostats - Solid State
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6501UKP120-T.pdf
- Description:
- MICROPOWER TEMPERATURE SWITCH
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
MAX6501UKP120-T from onsemi is an ultra-small, open-drain, active-low temperature switch in a 5-pin SOT-23A package, factory-programmed to trip at +120°C with ±4°C max threshold accuracy and pin-selectable +2°C or +10°C hysteresis. It draws only 17 µA typical supply current and operates across -55°C to +125°C, designed for microprocessor reset control in thermal safety circuits.
For engineers reviewing the MAX6501UKP120-T datasheet, MAX6501UKP120-T pinout, MAX6501UKP120-T application, or MAX6501UKP120-T equivalent, this device is selected for hot-temperature monitoring in space-constrained embedded systems where low quiescent current, factory-trimmed trip points, and hysteresis configurability are critical design requirements.
Technical Context
The MAX6501UKP120-T integrates a precision bandgap-based temperature sensor and comparator with internal reference trimming. Its output asserts low when die temperature exceeds the factory-set +120°C threshold, and hysteresis is controlled via the HYST pin (GND = +2°C, VCC = +10°C), independent of trip point selection.
It requires no external components beyond a pull-up resistor on TOVER and a 100 pF decoupling capacitor on VCC. The GND pin (Pin 2) provides lowest thermal resistance to the die, enabling accurate thermal coupling to monitored components such as CPUs or power MOSFETs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Threshold | +120°C factory-programmed trip point - defines exact overtemperature shutdown activation temperature |
| Hysteresis | +2°C (HYST = GND) or +10°C (HYST = VCC) - prevents output chatter near threshold during thermal transients |
| Threshold Accuracy | ±4°C maximum over full -55°C to +125°C range - ensures reliable fail-safe triggering within defined thermal margin |
| Supply Current | 17 µA typical at +25°C - enables always-on thermal monitoring without impacting system power budget |
| Supply Voltage Range | +2.7 V to +5.5 V - compatible with common logic rails including 3.3 V and 5 V microcontroller systems |
| Output Type | Open-drain, active-low TOVER - allows wired-OR configuration and level-shifting up to 7 V with external pull-up |
| Package | 5-pin SOT-23A (EIAJ SC-74A) - 2.9 mm × 2.8 mm footprint ideal for PCB space-constrained thermal sensing nodes |
Pinout & Package
5-pin SOT-23A package (Case 1212, EIAJ SC-74A), 2.9 mm × 2.8 mm × 1.15 mm body, with Pin 2 providing lowest thermal resistance to die for optimal thermal coupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | GND | Ground reference; both pins must be connected together near chip; Pin 2 is thermally optimized for minimal junction-to-PCB resistance |
| 3 | HYST | Hysteresis select input - CMOS-compatible; tie to GND for +2°C hysteresis or VCC for +10°C; floating prohibited |
| 4 | VCC | Positive supply input (+2.7 V to +5.5 V); requires ≥100 pF decoupling capacitor to GND for stable operation |
| 5 | TOVER | Open-drain, active-low output - sinks current when temperature exceeds +120°C; requires external pull-up resistor |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed +120°C trip point | Eliminates need for external calibration or trimming components; guarantees consistent thermal response across production units |
| Pin-selectable hysteresis (+2°C / +10°C) | Enables optimization for fast-response alarms (low hysteresis) or noise-immune thermal latching (high hysteresis) |
| 17 µA typical supply current | Supports continuous thermal monitoring in battery-backed or energy-sensitive systems without measurable power penalty |
| No external components required | Reduces BOM count and layout area; simplifies qualification and improves long-term reliability by removing passive drift sources |
| −55°C to +125°C operating range | Validated performance across industrial and extended-temperature environments, including under-hood and server chassis applications |
Applications
| Server CPU Thermal Shutdown | Notebook GPU Overtemperature Protection |
|---|---|
|
Use Scenario: Monitoring CPU die temperature in 1U rack servers to prevent thermal throttling or permanent damage during sustained compute loads. IC Role / Device Role / Timing Role: Standalone overtemperature detector asserting active-low reset signal to motherboard CPLD upon exceeding +120°C. Use Value: Enables deterministic, hardware-level shutdown before silicon thermal limits are breached - no firmware dependency or latency. |
Use Scenario: Protecting discrete GPU modules in thin-profile notebooks where airflow is restricted and localized hotspots exceed 115°C. IC Role / Device Role / Timing Role: Directly interfacing with GPU's reset input via open-drain output; HYST tied to VCC for +10°C hysteresis to avoid cycling during transient spikes. Use Value: Prevents GPU lockup or artifacting by triggering hard reset before thermal runaway - validated down to −55°C cold-start conditions. |
| Industrial PLC Power Module Monitoring | Network Switch ASIC Thermal Guard |
|
Use Scenario: Safeguarding IGBT gate drivers in programmable logic controller power stages exposed to ambient temperatures up to +85°C. IC Role / Device Role / Timing Role: Mounted adjacent to power stage with Pin 2 soldered to large copper pour; asserts TOVER low to disable PWM controller when local board temperature reaches +120°C. Use Value: Provides fail-safe, analog-independent protection that remains functional even if main controller firmware hangs or loses communication. |
Use Scenario: Detecting overheating in high-density Ethernet switch ASICs operating at 20+ W TDP in sealed fanless enclosures. IC Role / Device Role / Timing Role: Integrated into ASIC thermal management circuitry; TOVER drives optocoupler input to isolate shutdown signal from management MCU. Use Value: Guarantees ASIC shutdown within 200 ms of crossing +120°C - verified via SOT-23 thermal step response in still air per Figure 10. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar temperature switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6501UKP115-T | Factory-trimmed trip point at +115°C (5°C lower); identical pinout, hysteresis, and electrical specs | Suitable where thermal margin requires earlier intervention before reaching critical +120°C limit | Select when system derating or safety margin mandates shutdown at lower absolute temperature |
| LM75BIMM-3/NOPB | I²C digital output, ±2°C accuracy, 8-pin VSSOP, requires host MCU polling - no autonomous reset assertion | Used in systems with available I²C bus and firmware-controlled thermal policy, not hardware-fail-safe paths | Choose only if digital interface and programmable thresholds outweigh need for immediate, autonomous shutdown |
Compared with MAX6501UKP120-T, the MAX6501UKP115-T offers tighter thermal margin at same form factor and autonomy, while the LM75BIMM-3/NOPB trades instant hardware response for configurability and multi-zone monitoring - neither is pin-compatible, and both require PCB redesign.
Availability
MAX6501UKP120-T is available at Aetrix Electronics and suitable for server thermal shutdown, industrial PLC protection, notebook GPU safeguarding, and network switch ASIC guarding requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6501UKP120-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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud computing, and IoT applications.
The MAX6501 series belongs to onsemi's precision analog temperature sensing product line, engineered specifically for autonomous, low-power, hardware-based thermal protection in mission-critical embedded systems.
FAQ
What is the factory-set temperature threshold for MAX6501UKP120-T?
The MAX6501UKP120-T is factory-programmed to assert its open-drain output low when the die temperature reaches +120°C. This threshold is laser-trimmed during manufacturing and specified with ±4°C maximum accuracy over the full −55°C to +125°C operating range. No external calibration is required, and the value is fixed - it cannot be adjusted in-circuit.
Can MAX6501UKP120-T drive a microprocessor reset pin directly?
Yes, MAX6501UKP120-T is explicitly designed for microprocessor reset control. Its open-drain, active-low TOVER output can be pulled up to the processor's reset rail voltage (e.g., 3.3 V or 5 V) using a standard 10–100 kΩ resistor. When temperature exceeds +120°C, TOVER pulls low to hold the processor in reset until temperature falls below (120°C − hysteresis).
How is hysteresis configured on MAX6501UKP120-T?
Hysteresis on MAX6501UKP120-T is set by the voltage applied to the HYST pin (Pin 3): connect HYST to GND for +2°C hysteresis, or to VCC for +10°C hysteresis. The datasheet confirms this selection is CMOS-compatible and independent of the +120°C trip point. Floating HYST is prohibited - it increases supply current and risks erratic behavior.
What package type does MAX6501UKP120-T use, and what are its key mechanical dimensions?
MAX6501UKP120-T uses the 5-pin SOT-23A package (EIAJ SC-74A), with body dimensions of 2.9 mm × 2.8 mm × 1.15 mm. Per the official package drawing (Case 1212-01), it features 0.95 mm lead pitch and Pin 2 optimized for minimal thermal resistance - critical for accurate die temperature tracking in thermal management designs.
Does MAX6501UKP120-T require any external passive components to operate?
MAX6501UKP120-T requires only two external components: a 100 pF (or larger) ceramic capacitor between VCC and GND for supply decoupling, and a pull-up resistor on the TOVER pin (typically 10–100 kΩ). No resistors, capacitors, or references are needed for threshold setting or hysteresis - all functions are fully integrated and factory-configured in the MAX6501UKP120-T.
MAX6501UKP120-T 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:
- 120°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
MAX6501UKP120-T FAQ
1.How can I place an order for MAX6501UKP120-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6501UKP120-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 MAX6501UKP120-T reliable?
The price and inventory of MAX6501UKP120-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6501UKP120-T is usually 5 days.
3.What payment methods are accepted for MAX6501UKP120-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6501UKP120-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6501UKP120-T?
MAX6501UKP120-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6501UKP120-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 MAX6501UKP120-T?
For technical support, including MAX6501UKP120-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6501UKP120-T requirements.
6.How does Aetrix verify that MAX6501UKP120-T is sourced from the original manufacturer or authorized distributors?
All MAX6501UKP120-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 MAX6501UKP120-T meets industry standards.
7.What is the process for return or replacement of MAX6501UKP120-T?
All MAX6501UKP120-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6501UKP120-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 MAX6501UKP120-T part is unused and in its original packaging.
Return procedure for MAX6501UKP120-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6501UKP120-T Tags
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