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Analog Devices Inc./Maxim Integrated MAX6501UKP045
- Part No.:
- MAX6501UKP045
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Thermostats - Solid State
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6501UKP045.pdf
- Description:
- MICROPOWER TEMPERATURE SWITCH
- Quantity:
- Payment:
- Shipping:
Inventory:1,855
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Product details
Overview
MAX6501UKP045 from Maxim Integrated is a factory-programmed, hot-temperature threshold micropower temperature switch in SOT23-5 package, asserting an active-low open-drain output when die temperature exceeds +45°C with ±0.5°C typical accuracy, 30µA supply current, and pin-selectable 2°C/10°C hysteresis - used for microprocessor reset initiation in high-speed computing thermal monitoring.
For engineers reviewing the MAX6501UKP045 datasheet, MAX6501UKP045 pinout, MAX6501UKP045 application, or MAX6501UKP045 equivalent, this page delivers verified functional identity, confirmed SOT23-5 pin mapping, exact trip-point behavior (+45°C hot threshold), hysteresis configuration logic, and real-world µP reset integration requirements without generic assumptions.
Technical Context
The MAX6501UKP045 implements a fully integrated comparator architecture using dual on-chip temperature-dependent voltage references - one with positive temperature coefficient and one with negative temperature coefficient - whose intersection defines the precise +45°C trip point. Its internal power-on reset guarantees TOVER remains high for 50µs at startup.
Hysteresis is selected via the HYST pin: grounded for 2°C hysteresis or tied to VCC for 10°C hysteresis. The open-drain TOVER output requires an external 100kΩ pullup resistor and supports rail-to-rail voltage translation (can be pulled up to voltages exceeding VCC).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Threshold | +45°C hot-trip point - output asserts low when die temperature exceeds +45°C. |
| Threshold Accuracy | ±0.5°C typical over full operating range - enables precise thermal event triggering without calibration. |
| Supply Voltage Range | +2.7V to +5.5V - compatible with 3.3V and 5V logic rails and battery-powered systems. |
| Supply Current | 30µA typical - minimizes self-heating (<0.042°C shift) and extends battery life in portable designs. |
| Output Type | Active-low open-drain TOVER - interfaces directly with µP reset inputs requiring external pullup. |
| Hysteresis Options | 2°C (HYST = GND) or 10°C (HYST = VCC) - prevents output oscillation near trip point. |
| Operating Temp Range | -55°C to +125°C - supports industrial and automotive under-hood environments. |
Pinout & Package
SOT23-5 package with exposed pad not electrically connected; pins 1 and 2 are both GND (pin 2 provides lowest thermal resistance to die); device requires short, wide copper traces 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 optimizes thermal path to die. |
| 3 | HYST | Hysteresis select input - CMOS-compatible; tie to GND for 2°C hysteresis, VCC for 10°C; must not float. |
| 4 | VCC | Positive supply input (+2.7V to +5.5V); powers internal references and comparator. |
| 5 | TOVER | Active-low open-drain output - sinks current when TDIE > +45°C; requires 100kΩ pullup to logic rail. |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Fully integrated reference/comparator eliminates trimming resistors, capacitors, or op-amps. |
| Factory-programmed +45°C threshold | Eliminates field calibration; ensures consistent trip behavior across production batches. |
| Pin-selectable hysteresis | Enables system-level noise immunity tuning without changing BOM or layout. |
| Open-drain output with rail-to-rail pullup support | Allows interface with µP reset inputs operating at different voltage domains (e.g., 3.3V IC with 5V pullup). |
| Low thermal resistance via Pin 2 | Enables accurate die temperature tracking when mounted under socketed µPs or on thermally optimized PCBs. |
Applications
| Microprocessor Thermal Reset | Fan Control Initiation |
|---|---|
Use Scenario: Monitoring CPU die temperature in embedded servers to prevent thermal runaway during sustained load. IC Role / Device Role / Timing Role: Temperature switch providing hardware-level reset signal to µP reset pin upon crossing +45°C. Use Value: Prevents software lockup by forcing hard reset before thermal throttling fails, leveraging 30µA quiescent current to avoid self-heating errors. |
Use Scenario: Triggering cooling fan activation when ambient or board temperature exceeds safe operating limit. IC Role / Device Role / Timing Role: Hot-threshold sensor driving fan controller enable line via open-drain output with configurable hysteresis. Use Value: Enables deterministic fan start at precisely +45°C with 2°C hysteresis to suppress chatter during transient thermal excursions. |
| Industrial Equipment Overtemp Alarm | Power Supply Thermal Shutdown |
Use Scenario: Detecting overheating in motor drive inverters where heatsink temperature must stay below +45°C. IC Role / Device Role / Timing Role: Standalone thermal alarm asserting low on TOVER to activate LED indicator or disable gate driver. Use Value: Provides fail-safe protection independent of MCU firmware, with ±0.5°C accuracy ensuring early fault detection before component derating. |
Use Scenario: Safeguarding DC-DC converter modules against thermal stress during overload or airflow failure. IC Role / Device Role / Timing Role: Die-temperature monitor interfacing with enable/disable logic of power stage to halt operation above +45°C. Use Value: Prevents MOSFET thermal runaway by cutting power before junction temperature reaches critical levels, using minimal board space (SOT23-5). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar temperature switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6502UKP045 | Push-pull active-high output instead of open-drain active-low; same +45°C trip, accuracy, and supply specs. | Directly drives fan-enable logic without external pullup; incompatible with µP reset inputs expecting active-low assertion. | Select MAX6502UKP045 only when interfacing with CMOS logic inputs requiring sourcing capability and no external biasing. |
| LM75BIMM-3/NOPB | I²C digital output, 9-bit temperature reading, ±2°C accuracy, 250µA supply current; no factory-trimmed switch functionality. | Requires MCU firmware polling and decision logic; lacks hardware-level reset assertion and hysteresis control. | Choose LM75BIMM-3/NOPB only when programmable thresholds, remote sensing, or temperature logging are required - not for direct hardware reset. |
Compared with MAX6501UKP045, MAX6502UKP045 offers simplified fan-control wiring but loses µP reset compatibility, while LM75BIMM-3/NOPB adds digital flexibility at the cost of latency, firmware dependency, and reduced trip-point precision - making MAX6501UKP045 optimal for deterministic, low-power, hardware-triggered thermal safety.
Availability
MAX6501UKP045 is available at Aetrix Electronics and suitable for microprocessor thermal reset, industrial equipment overtemperature alarms, and power supply thermal shutdown requiring stable component supply, guaranteed RoHS-compliant sourcing, and long-term lifecycle continuity.
Supply support for MAX6501UKP045 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 industrial, communications, and computing applications, emphasizing integration, low power, and reliability.
The MAX6501–MAX6504 product line delivers micropower, factory-trimmed temperature switches targeting hardware-level thermal safety in space-constrained, cost-sensitive systems - specifically engineered for direct µP reset and fan-control integration without external components.
FAQ
What is the exact temperature trip point of the MAX6501UKP045?
The MAX6501UKP045 has a factory-programmed hot-temperature threshold of +45°C. It asserts its active-low TOVER output when the die temperature exceeds this value. This trip point is trimmed during manufacturing and specified with ±0.5°C typical accuracy across the full -55°C to +125°C operating range, as confirmed in the official Maxim datasheet revision 6.
Does the MAX6501UKP045 require external components to operate?
No, the MAX6501UKP045 requires no external components for basic operation. It integrates two temperature-dependent voltage references and a comparator on-die. However, its open-drain TOVER output necessitates an external 100kΩ pullup resistor to a logic rail - a passive component not considered part of the functional signal chain but essential for level translation and reset assertion.
How is hysteresis configured on the MAX6501UKP045?
Hysteresis on the MAX6501UKP045 is set via the HYST pin: connect HYST to GND for 2°C hysteresis or to VCC for 10°C hysteresis. Leaving HYST floating increases supply current and is prohibited. The actual hysteresis magnitude also depends on the programmed trip temperature, as shown in Figure MAX6501 TOC8 of the datasheet.
Can the MAX6501UKP045 output interface with a 5V microprocessor reset input while powered from 3.3V?
Yes, the MAX6501UKP045 TOVER output is open-drain and supports rail-to-rail pullup. When powered from 3.3V, TOVER can be pulled up to 5V using a 100kΩ resistor, enabling direct interface with 5V µP reset inputs - a key design feature explicitly documented in the Absolute Maximum Ratings and Typical Operating Circuit figures.
What is the thermal resistance and self-heating impact of the MAX6501UKP045 in SOT23-5 package?
The MAX6501UKP045 in SOT23-5 has a typical θJA of 140°C/W. With 30µA supply current at 3.3V, it dissipates ~102µW - resulting in negligible self-heating (~0.014°C). Even with 1mA sink current (e.g., driving a reset line), dissipation rises to ~0.3mW, causing only ~0.042°C die temperature shift - well within the ±0.5°C accuracy specification.
MAX6501UKP045 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:
- 45°C
- Accuracy:
- ±4°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
MAX6501UKP045 FAQ
1.How can I place an order for MAX6501UKP045 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6501UKP045 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 MAX6501UKP045 reliable?
The price and inventory of MAX6501UKP045 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6501UKP045 is usually 5 days.
3.What payment methods are accepted for MAX6501UKP045?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6501UKP045 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6501UKP045?
MAX6501UKP045 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6501UKP045 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 MAX6501UKP045?
For technical support, including MAX6501UKP045 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6501UKP045 requirements.
6.How does Aetrix verify that MAX6501UKP045 is sourced from the original manufacturer or authorized distributors?
All MAX6501UKP045 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 MAX6501UKP045 meets industry standards.
7.What is the process for return or replacement of MAX6501UKP045?
All MAX6501UKP045 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6501UKP045, 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 MAX6501UKP045 part is unused and in its original packaging.
Return procedure for MAX6501UKP045:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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