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Analog Devices Inc./Maxim Integrated MAX6501UKP085-T
- Part No.:
- MAX6501UKP085-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Thermostats - Solid State
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6501UKP085-T.pdf
- Description:
- MICROPOWER TEMPERATURE SWITCH
- Quantity:
- Payment:
- Shipping:
Inventory:12,444
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Product details
Overview
MAX6501UKP085-T from Maxim Integrated is a factory-programmed, micropower temperature switch with +85°C hot-trip threshold, active-low open-drain output, and pin-selectable 2°C/10°C hysteresis. It operates from +2.7V to +5.5V, consumes 30µA typical supply current, achieves ±0.5°C typical threshold accuracy over -55°C to +125°C, and requires no external components. It interfaces directly with microprocessor reset inputs for thermal safety in high-speed computing systems.
For engineers reviewing the MAX6501UKP085-T datasheet, MAX6501UKP085-T pinout, MAX6501UKP085-T application, or MAX6501UKP085-T equivalent, key selection criteria include trip-point precision, open-drain drive capability into µP reset logic, hysteresis configuration flexibility, low quiescent current for battery-sensitive designs, and SOT23-5 footprint compatibility with space-constrained PCB layouts.
Technical Context
The MAX6501UKP085-T uses dual on-chip temperature-dependent voltage references-one with positive and one with negative temperature coefficient-to define its +85°C trip point via their intersection. Its internal comparator drives an open-drain output stage that sinks up to 1.2mA at VCC > 2.7V, with guaranteed VOL ≤ 0.3V under that condition.
Hysteresis is selected by biasing the HYST pin to GND (2°C) or VCC (10°C); this prevents output oscillation near threshold and is confirmed functional across the full -55°C to +125°C operating range. The device incorporates a power-on reset circuit ensuring defined output state for 50µs at startup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.7V to +5.5V - supports direct connection to common logic rails without regulation. |
| Temperature Threshold | +85°C - factory-trimmed hot-trip point, accurate to ±0.5°C (typ) over full operating range. |
| Output Type | Active-low, open-drain - compatible with µP reset inputs; requires external pull-up resistor. |
| Supply Current | 30µA (typ) - enables use in always-on, battery-backed thermal monitoring circuits. |
| Hysteresis Options | 2°C (HYST = GND) or 10°C (HYST = VCC) - user-configurable to prevent chatter during slow thermal transients. |
| Operating Temperature | -55°C to +125°C - qualified for industrial and extended-temperature embedded environments. |
| Package | SOT23-5 - compact 2.9mm × 1.6mm footprint with Pin 2 optimized for lowest thermal resistance to die. |
Pinout & Package
SOT23-5 package with exposed 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 are ground; connect together near chip; Pin 2 is thermally critical for die-to-PCB heat transfer. |
| 3 HYST | Hysteresis select input | CMOS-compatible digital input: tie to GND for 2°C hysteresis, VCC for 10°C; must not float. |
| 4 VCC | Positive supply | +2.7V to +5.5V supply input; decoupling capacitor recommended near pin. |
| 5 TOVER | Active-low open-drain output | Sinks current when die temperature exceeds +85°C; requires external pull-up (e.g., 100kΩ) to VCC or higher voltage. |
Key Features
| Feature | Design Value |
|---|---|
| ±0.5°C typical threshold accuracy | Enables precise thermal shutdown without calibration overhead in production systems. |
| No external components required | Reduces BOM count and layout area; eliminates trimming resistors or external references. |
| 30µA typical supply current | Supports multi-year operation on coin-cell batteries in remote sensor or watchdog applications. |
| Pin-selectable hysteresis | Allows dynamic trade-off between noise immunity (10°C) and tight thermal control window (2°C). |
| Open-drain output with 1.2mA sink capability | Directly drives standard µP reset inputs without level-shifting or buffering circuitry. |
Applications
| Microprocessor Thermal Reset | Fan Control Enable Signal |
|---|---|
Use Scenario: Monitoring CPU die temperature in high-speed desktop or server motherboards to prevent thermal runaway. IC Role / Device Role / Timing Role: Temperature switch asserting active-low reset signal to processor when local board temperature exceeds +85°C. Use Value: Prevents permanent silicon damage by triggering immediate system halt before junction temperature reaches destructive levels. |
Use Scenario: Activating cooling fans in industrial PLC controllers when ambient enclosure temperature rises above safe limit. IC Role / Device Role / Timing Role: Open-drain output pulled up to 3.3V logic rail, driving fan controller enable input upon thermal excursion. Use Value: Eliminates need for discrete transistor interface; reduces component count while maintaining fail-safe thermal response. |
| Temperature Window Alarm | Fail-Safe System Monitor |
Use Scenario: Detecting out-of-range temperature in medical diagnostic equipment requiring stable thermal environment (-5°C to +75°C window). IC Role / Device Role / Timing Role: Paired with MAX6503UKN005 cold-switch; outputs wire-ORed via single pull-up to generate unified over/under alarm. Use Value: Enables accurate window detection using two dedicated switches instead of complex analog circuitry or µC firmware. |
Use Scenario: Dual-redundant thermal monitoring in aerospace avionics where single-point failure must be avoided. IC Role / Device Role / Timing Role: One MAX6501UKP085-T triggers fan at +85°C; second unit (e.g., MAX6501UKP105-T) asserts hard shutdown at +105°C. Use Value: Provides graded response-cooling first, then shutdown-without software intervention or timing dependencies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar temperature switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM20BIMAX/NOPB | Analog output temperature sensor (0.5V–1.5V linear scale), not a switch; requires external comparator and reference. | Used where variable temperature feedback is needed-not suitable for direct reset assertion. | Select only if system already includes ADC/comparator and needs analog telemetry alongside switching. |
| TC74A0-5.0VAT | I²C digital output, ±2°C accuracy, 250µA supply current, +2.7V to +5.5V supply, SOIC-8 package. | Requires µC I²C interface and firmware polling; no autonomous reset assertion. | Choose when centralized thermal management with multiple sensors is preferred over distributed autonomous switches. |
Compared with LM20BIMAX/NOPB and TC74A0-5.0VAT, the MAX6501UKP085-T delivers autonomous, zero-software, sub-1ms response to thermal excursions with minimal external components-making it optimal for safety-critical reset and alarm functions where latency and reliability are paramount.
Availability
MAX6501UKP085-T is available at Aetrix Electronics and suitable for microprocessor thermal reset, fan control enable, temperature window alarm, and fail-safe system monitor applications requiring stable component supply and long-term industrial lifecycle support.
Supply support for MAX6501UKP085-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, automotive, communications, and computing markets.
The MAX6501–MAX6504 family was developed specifically for cost-sensitive, space-constrained thermal monitoring applications requiring autonomous, low-power, factory-calibrated switching without µC involvement.
FAQ
What is the exact temperature trip point of the MAX6501UKP085-T?
The MAX6501UKP085-T has a factory-programmed hot-trip threshold of +85°C, with typical accuracy of ±0.5°C over the full -55°C to +125°C operating range. This value is laser-trimmed during manufacturing and does not require field calibration. The MAX6501UKP085-T asserts its open-drain output low when die temperature exceeds this point.
Does the MAX6501UKP085-T require external components to operate?
No, the MAX6501UKP085-T requires no external components for basic operation. It integrates both temperature references and a comparator internally. Only an external pull-up resistor (e.g., 100kΩ) on the TOVER pin is needed to interface with a microprocessor reset input. No capacitors, resistors, or trimming networks are necessary for threshold functionality.
How is hysteresis configured on the MAX6501UKP085-T?
Hysteresis on the MAX6501UKP085-T is set by the voltage applied to the HYST pin: connect HYST to GND for 2°C hysteresis or to VCC for 10°C hysteresis. The pin must not be left floating, as intermediate voltages increase supply current. This configuration is verified functional across the entire -55°C to +125°C operating temperature range of the MAX6501UKP085-T.
Can the MAX6501UKP085-T drive a microprocessor reset input directly?
Yes, the MAX6501UKP085-T's active-low open-drain TOVER output is designed specifically for direct interface with µP reset inputs. When the die temperature exceeds +85°C, TOVER pulls low and sinks up to 1.2mA (at VCC > 2.7V), meeting standard reset input requirements. A pull-up resistor to the µP's logic rail completes the interface-no buffer or level shifter is needed for the MAX6501UKP085-T.
What is the thermal resistance and self-heating impact of the MAX6501UKP085-T?
The MAX6501UKP085-T in SOT23-5 has a typical θJA of 140°C/W. With 30µA supply current and negligible output loading, self-heating is <0.01°C. Even under worst-case 1mA sink, power dissipation adds only ~0.3mW, causing a die temperature rise of ~0.042°C-well within the ±0.5°C accuracy spec. Pin 2's low thermal resistance ensures rapid thermal tracking of the monitored device.
MAX6501UKP085-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:
- 85°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
MAX6501UKP085-T FAQ
1.How can I place an order for MAX6501UKP085-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6501UKP085-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 MAX6501UKP085-T reliable?
The price and inventory of MAX6501UKP085-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6501UKP085-T is usually 5 days.
3.What payment methods are accepted for MAX6501UKP085-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6501UKP085-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6501UKP085-T?
MAX6501UKP085-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6501UKP085-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 MAX6501UKP085-T?
For technical support, including MAX6501UKP085-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6501UKP085-T requirements.
6.How does Aetrix verify that MAX6501UKP085-T is sourced from the original manufacturer or authorized distributors?
All MAX6501UKP085-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 MAX6501UKP085-T meets industry standards.
7.What is the process for return or replacement of MAX6501UKP085-T?
All MAX6501UKP085-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6501UKP085-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 MAX6501UKP085-T part is unused and in its original packaging.
Return procedure for MAX6501UKP085-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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