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Analog Devices Inc./Maxim Integrated MAX6502UKP045+T
- Part No.:
- MAX6502UKP045+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Thermostats - Solid State
- Package:
- -
- Datasheet:
-
MAX6502UKP045+T.pdf
- Description:
- IC TEMP SWITCH SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,924
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Product details
Overview
MAX6502UKP045+T from Maxim Integrated is a factory-programmed, hot-temperature-threshold micropower temperature switch in SOT23-5 package, asserting an active-high push-pull output when die temperature exceeds +45°C (±0.5°C typical accuracy), operating from +2.7V to +5.5V supply with 30µA quiescent current and pin-selectable 2°C or 10°C hysteresis. It directly drives fan-control logic in thermal management systems.
For engineers reviewing the MAX6502UKP045+T datasheet, MAX6502UKP045+T pinout, MAX6502UKP045+T application, or MAX6502UKP045+T equivalent, key selection criteria include trip-point accuracy, push-pull drive capability, hysteresis configuration, supply current budget, and SOT23 thermal interface suitability for PCB-mounted thermal monitoring.
Technical Context
The MAX6502UKP045+T implements a comparator-based architecture using dual on-chip temperature-dependent voltage references-one with positive and one with negative temperature coefficient-to define the +45°C trip point. Its internal power-on reset guarantees output stability for 50µs at startup.
Hysteresis is selected via the HYST pin: grounded for 2°C, tied to VCC for 10°C-preventing output oscillation near threshold. The push-pull output sources up to 800µA (VCC > 4.5V) and sinks up to 3.2mA, enabling direct interface with fan control logic without external pull-up components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Threshold | +45°C factory-trimmed, ±0.5°C typical accuracy over full range ensures precise overtemperature detection without calibration. |
| Supply Voltage Range | +2.7V to +5.5V supports operation across 3.3V and 5V system rails without level-shifting. |
| Quiescent Current | 30µA typical enables battery-powered or ultra-low-power thermal monitoring with negligible impact on system energy budget. |
| Output Type | Active-high push-pull eliminates need for external pull-up resistor and provides robust drive for fan enable inputs. |
| Hysteresis Options | PIN-selectable 2°C (HYST = GND) or 10°C (HYST = VCC) prevents chatter during slow thermal transitions. |
| Operating Temp Range | -55°C to +135°C ambient rating allows deployment in industrial and automotive under-hood environments. |
| Package | SOT23-5 with dual GND pins (pins 1 & 2) optimized for low thermal resistance-pin 2 provides lowest θJA path to die. |
Pinout & Package
SOT23-5 package with exposed thermal pad not electrically connected; pins 1 and 2 are both GND (connect together near device for lowest thermal impedance); pin 2 offers lowest thermal resistance to die.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 GND | Ground reference and thermal path | Both pins must be connected to system ground; pin 2 provides optimal thermal conduction to PCB copper for accurate die temperature tracking. |
| 3 HYST | Hysteresis select input | CMOS-compatible digital input: tie to GND for 2°C hysteresis, to VCC for 10°C; floating state increases supply current and must be avoided. |
| 4 VCC | Positive supply input | Accepts +2.7V to +5.5V; decoupling capacitor recommended close to pin for noise immunity during output switching. |
| 5 TOVER | Active-high push-pull output | Drives high when die temperature > +45°C; sources 800µA / sinks 3.2mA (VCC > 4.5V); compatible with TTL/CMOS fan-enable inputs. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed +45°C threshold | Eliminates external calibration and reduces BOM count-enables drop-in thermal protection in fan-control circuits. |
| Push-pull output stage | Directly interfaces with fan driver ICs or logic inputs without pull-up resistors, reducing layout complexity and board space. |
| Pin-selectable hysteresis | Enables system-level tuning of thermal response: 2°C for tight control, 10°C for noisy or slowly varying thermal environments. |
| 30µA supply current | Supports always-on thermal monitoring in power-constrained applications such as portable instrumentation or edge sensors. |
| Dual GND pins in SOT23 | Improves thermal coupling to PCB-pin 2's lower θJA enhances measurement fidelity when mounted near heat sources like CPUs or power MOSFETs. |
Applications
| Fan Control in Embedded Systems | Microprocessor Thermal Monitoring |
|---|---|
Use Scenario: Monitors CPU or SoC die temperature on embedded boards and activates cooling fan before thermal throttling occurs. IC Role / Device Role / Timing Role: Temperature switch providing immediate, deterministic overtemperature assertion at +45°C with no software latency. Use Value: Prevents performance degradation by triggering fan at a safe margin below critical junction temperature, leveraging 30µA quiescent current for continuous monitoring. | Use Scenario: Mounted under a socketed microprocessor to detect overheating and assert interrupt or reset signal. IC Role / Device Role / Timing Role: Hardware-level thermal watchdog with 50µs power-on reset guarantee ensuring reliable startup behavior. Use Value: Provides fail-safe hardware reset independent of firmware execution-critical for mission-critical industrial controllers. |
| Industrial Power Supply Protection | Thermal Window Alarm (with companion device) |
Use Scenario: Mounted on heatsink of DC-DC converter to shut down output if MOSFET temperature exceeds safe limit. IC Role / Device Role / Timing Role: Overtemperature cutoff switch interfacing directly with enable/disable logic of power controller IC. Use Value: Enables autonomous shutdown without MCU involvement-reduces single-point failure risk in safety-critical power stages. | Use Scenario: Paired with MAX6503UKN005 (−5°C cold threshold) to generate out-of-window alarm for systems requiring −5°C to +45°C operational envelope. IC Role / Device Role / Timing Role: Hot-side leg of complementary temperature window detector with push-pull output OR'd with cold-side open-drain output. Use Value: Delivers precise thermal guardbanding using two discrete, factory-trimmed switches-no trimming resistors or op-amps required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar temperature switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM75BIMM/NOPB | I²C digital output, ±2°C accuracy, 12-bit temperature readback, requires host MCU polling. | Used where programmable thresholds and temperature telemetry are needed-not suitable for autonomous hardware-triggered actions. | Select LM75BIMM/NOPB only when digital interface and temperature logging are required; MAX6502UKP045+T is preferred for deterministic, zero-latency hardware response. |
| TC74A0-5.0VAT | I²C interface, ±2°C accuracy, 8-bit temperature register, 2.7–5.5V supply, no hysteresis pin. | Requires firmware intervention for threshold action; lacks pin-selectable hysteresis and push-pull drive strength. | Choose TC74A0-5.0VAT for systems with available I²C bandwidth and MCU resources; MAX6502UKP045+T delivers simpler, more robust hardware-level control. |
Compared with LM75BIMM/NOPB and TC74A0-5.0VAT, the MAX6502UKP045+T provides deterministic, zero-software-latency overtemperature response with push-pull drive-making it superior for fan enable, hardware reset, or autonomous shutdown where MCU involvement cannot be assumed.
Availability
MAX6502UKP045+T is available at Aetrix Electronics and suitable for fan control, microprocessor thermal monitoring, industrial power supply protection, and thermal window alarm applications requiring stable component supply and long-term manufacturability.
Supply support for MAX6502UKP045+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, mixed-signal, and power management ICs for industrial, communications, computing, and consumer applications.
The MAX6501–MAX6504 family was designed specifically for low-cost, micropower, hardware-based thermal monitoring-delivering factory-trimmed accuracy and minimal external components in space-constrained SOT23 packaging.
FAQ
What is the exact temperature trip point of the MAX6502UKP045+T?
The MAX6502UKP045+T has a factory-programmed hot-temperature threshold of +45°C, with ±0.5°C typical accuracy over the full operating temperature range (−55°C to +135°C). This value is laser-trimmed during production and does not require external calibration. The MAX6502UKP045+T asserts its active-high TOVER output when die temperature exceeds this threshold.
Does the MAX6502UKP045+T require external components to operate?
No, the MAX6502UKP045+T requires no external components for basic operation. Its push-pull output eliminates the need for a pull-up resistor, and internal references and comparator are fully integrated. Only a 0.1µF VCC bypass capacitor is recommended for noise immunity. The MAX6502UKP045+T achieves full functionality with just power, ground, hysteresis configuration, and load connection.
How is hysteresis configured on the MAX6502UKP045+T?
Hysteresis on the MAX6502UKP045+T is configured via the HYST pin: connect HYST to GND for 2°C hysteresis or to VCC for 10°C hysteresis. The pin is CMOS-compatible and must not be left floating, as that increases supply current and may cause erratic behavior. The actual hysteresis value also depends on the programmed trip point, per the device's Typical Operating Characteristics graph.
Can the MAX6502UKP045+T drive a fan directly?
Yes, the MAX6502UKP045+T can drive small-to-medium fan control inputs directly. Its push-pull TOVER output sources up to 800µA and sinks up to 3.2mA (at VCC > 4.5V), meeting typical fan-enable input requirements. For higher-current fans, use the MAX6502UKP045+T to drive a MOSFET gate or dedicated fan controller-never connect the output directly to a fan motor winding.
What is the thermal resistance and self-heating effect of the MAX6502UKP045+T in SOT23-5?
The MAX6502UKP045+T in SOT23-5 has a typical junction-to-ambient thermal resistance (θJA) of 140°C/W. With 30µA supply current at 5V, power dissipation is ~150µW-resulting in negligible self-heating (<0.02°C). When sinking 1mA, additional dissipation raises die temperature by ~0.042°C. Pin 2 provides the lowest thermal resistance path to the die, so grounding both GND pins near the device maximizes thermal tracking accuracy.
MAX6502UKP045+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Trip Temperature Threshold:
- -
- Switching Temperature:
- -
- Accuracy:
- -
- Current - Output (Max):
- -
- Output Type:
- -
- Output:
- -
- Output Function:
- -
- Selectable Hysteresis:
- -
- Features:
- -
- Voltage - Supply:
- -
- Current - Supply:
- -
- Operating Temperature:
- -
- Mounting Type:
- -
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- -
MAX6502UKP045+T FAQ
1.How can I place an order for MAX6502UKP045+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6502UKP045+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 MAX6502UKP045+T reliable?
The price and inventory of MAX6502UKP045+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6502UKP045+T is usually 5 days.
3.What payment methods are accepted for MAX6502UKP045+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6502UKP045+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6502UKP045+T?
MAX6502UKP045+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6502UKP045+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 MAX6502UKP045+T?
For technical support, including MAX6502UKP045+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6502UKP045+T requirements.
6.How does Aetrix verify that MAX6502UKP045+T is sourced from the original manufacturer or authorized distributors?
All MAX6502UKP045+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 MAX6502UKP045+T meets industry standards.
7.What is the process for return or replacement of MAX6502UKP045+T?
All MAX6502UKP045+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6502UKP045+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 MAX6502UKP045+T part is unused and in its original packaging.
Return procedure for MAX6502UKP045+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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