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Analog Devices Inc./Maxim Integrated MAX6501UKP085
- Part No.:
- MAX6501UKP085
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Thermostats - Solid State
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6501UKP085.pdf
- Description:
- MICROPOWER TEMPERATURE SWITCH
- Quantity:
- Payment:
- Shipping:
Inventory:1,469
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Product details
Overview
MAX6501UKP085 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 is used for microprocessor reset assertion in high-speed computing thermal monitoring.
For engineers reviewing the MAX6501UKP085 datasheet, MAX6501UKP085 pinout, MAX6501UKP085 application, or MAX6501UKP085 equivalent, key selection criteria include trip-point polarity (hot vs. cold), output type (open-drain vs. push-pull), hysteresis configuration, supply current budget, and SOT23-5 thermal interface capability.
Technical Context
The MAX6501UKP085 implements a fully integrated analog temperature sensing architecture using two on-die voltage references-one with positive temperature coefficient and one with negative temperature coefficient-whose intersection defines the +85°C trip point. Its internal comparator drives an open-drain output stage that sinks up to 1.2mA.
Hysteresis is controlled by the HYST pin: logic low selects 2°C hysteresis; logic high selects 10°C hysteresis. The device includes internal power-on reset ensuring defined output state for 50µs at startup, and features dual GND pins (pins 1 and 2) optimized for minimal thermal resistance to the die.
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, asserts output when die temperature exceeds +85°C |
| Threshold Accuracy | ±0.5°C (typ), ±6°C (max) - enables precise thermal event detection without calibration |
| Supply Current | 30µA (typ) - allows battery-powered or ultra-low-power system integration |
| Output Type | Active-low, open-drain - compatible with µP reset inputs and permits wired-OR with other open-drain signals |
| Hysteresis Options | 2°C (HYST = GND) or 10°C (HYST = VCC) - prevents output oscillation near trip point |
| Package | SOT23-5 - compact footprint with dual GND pins for enhanced thermal coupling to PCB copper |
Pinout & Package
SOT23-5 package with exposed thermal pad not electrically connected; pins 1 and 2 are both GND and must be connected together near the device for lowest thermal resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 GND | Ground reference and thermal path | Both pins connect internally to substrate ground; pin 2 provides lowest θJA to die - must be tied together and routed to large copper area |
| 3 HYST | Hysteresis select input | CMOS-compatible logic input: GND → 2°C hysteresis, VCC → 10°C hysteresis; floating not allowed |
| 4 VCC | Positive supply input | Accepts +2.7V to +5.5V; absolute max +7V; powers internal references and comparator |
| 5 TOVER | Active-low open-drain output | Sinks up to 1.2mA; requires external pullup (e.g., 100kΩ); may be pulled to voltage > VCC for level-shifting |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed +85°C trip point | Eliminates need for external resistors or trimming; ensures repeatable thermal response across production lots |
| Dual GND pins with thermal optimization | Pin 2 provides lowest thermal resistance path to die - enables accurate monitoring of adjacent ICs via PCB conduction |
| No external components required | Reduces BOM count, board space, and assembly cost; simplifies layout and qualification |
| Open-drain output with > VCC pullup support | Allows interfacing with µP reset inputs operating at different voltage domains (e.g., 3.3V device driving 5V reset line) |
| 50µs power-on reset guarantee | Ensures known output state during power ramp-up - prevents spurious resets or false alarms at startup |
Applications
| Microprocessor Thermal Reset | Fan Control Enable |
|---|---|
|
Use Scenario: Monitoring CPU die temperature in embedded computing systems to prevent thermal runaway. IC Role / Device Role / Timing Role: Temperature switch asserting active-low reset signal to µP when local board temperature exceeds +85°C. Use Value: Prevents system lockup or data corruption by triggering controlled shutdown before silicon damage occurs. |
Use Scenario: Activating cooling fans when ambient or enclosure temperature rises above safe operating limit. IC Role / Device Role / Timing Role: Open-drain output pulls down fan-enable line upon crossing +85°C threshold. Use Value: Enables immediate thermal mitigation without software intervention or MCU overhead. |
| Industrial Equipment Overtemperature Alarm | Power Supply Thermal Protection |
|
Use Scenario: Detecting overheating in motor drives or PLC modules where ambient temperature exceeds design limits. IC Role / Device Role / Timing Role: Provides fail-safe hardware-level alarm independent of firmware execution. Use Value: Ensures safety-critical shutdown even if control software hangs or fails. |
Use Scenario: Monitoring heatsink temperature near DC-DC converter MOSFETs to prevent thermal stress. IC Role / Device Role / Timing Role: Directly interfaces with supervisor IC or power sequencer reset input. Use Value: Adds robust, low-power thermal guardband without increasing system complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar temperature switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6502UKP085 | Push-pull, active-high output instead of open-drain, active-low; identical +85°C trip and hysteresis options | Directly drives logic inputs without pullup resistor; incompatible with wired-OR configurations | Select when interfacing with fan-control logic requiring high-true signaling and no external pullup |
| LM75BIMM/NOPB | I²C digital temperature sensor with programmable thresholds; 3.5mA active current vs. 30µA; ±2°C accuracy | Requires MCU firmware support; enables adjustable thresholds and remote reading, not simple hardware reset | Select when system already uses I²C bus and needs configurable trip points or temperature telemetry |
Compared with MAX6501UKP085, MAX6502UKP085 offers simpler drive capability but loses wired-OR flexibility, while LM75BIMM/NOPB adds configurability and measurement at the cost of higher power and firmware dependency.
Availability
MAX6501UKP085 is available at Aetrix Electronics and suitable for microprocessor thermal reset, industrial equipment overtemperature alarms, and power supply thermal protection requiring stable component supply and long-term lifecycle support.
Supply support for MAX6501UKP085 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, computing, and communications applications.
The MAX6501–MAX6504 family delivers low-cost, micropower thermal monitoring solutions targeting embedded systems needing deterministic, hardware-based temperature response without software involvement.
FAQ
What is the exact temperature trip point of the MAX6501UKP085?
The MAX6501UKP085 has a factory-programmed hot-trip threshold of +85°C. This means its TOVER output goes low when the die temperature exceeds +85°C. The threshold is trimmed to ±0.5°C typical accuracy across the full operating range of -55°C to +125°C, and the device does not require recalibration or external components to maintain this specification.
Does the MAX6501UKP085 require an external pullup resistor on the TOVER pin?
Yes, the MAX6501UKP085 requires an external pullup resistor on the TOVER pin because it features an active-low open-drain output. A typical value is 100kΩ connected to a logic rail (e.g., 3.3V or 5V). The datasheet confirms TOVER may be pulled up to a voltage higher than VCC, enabling level-shifting applications - a feature not available with push-pull alternatives like MAX6502UKP085.
How is hysteresis configured on the MAX6501UKP085?
Hysteresis on the MAX6501UKP085 is configured via the HYST pin: connecting HYST to GND selects 2°C hysteresis, while connecting it to VCC selects 10°C hysteresis. The pin must not be left floating, as undefined logic levels increase supply current. The actual hysteresis value also depends on the programmed trip point, as shown in the Typical Operating Characteristics graph (Figure MAX6501 TOC8).
Can the MAX6501UKP085 be used in battery-powered applications?
Yes, the MAX6501UKP085 is well-suited for battery-powered applications due to its 30µA typical supply current and operation down to +2.7V. Its micropower consumption enables multi-year operation on coin cells in thermal alarm or environmental monitor designs. Self-heating is negligible (<0.05°C) under typical load conditions, preserving measurement integrity without active thermal compensation.
What is the thermal resistance (θJA) of the MAX6501UKP085 in its SOT23-5 package?
The MAX6501UKP085 in the SOT23-5 package has a typical junction-to-ambient thermal resistance (θJA) of 140°C/W. This value assumes standard PCB mounting on 0.75in² of 2 oz. copper. Pin 2 provides the lowest thermal resistance path to the die, so optimal thermal performance requires tying pins 1 and 2 together and connecting them directly to a large copper pour - critical for accurate die temperature tracking in µP monitoring applications.
MAX6501UKP085 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 FAQ
1.How can I place an order for MAX6501UKP085 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6501UKP085 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 reliable?
The price and inventory of MAX6501UKP085 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6501UKP085 is usually 5 days.
3.What payment methods are accepted for MAX6501UKP085?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6501UKP085 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6501UKP085?
MAX6501UKP085 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6501UKP085 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?
For technical support, including MAX6501UKP085 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6501UKP085 requirements.
6.How does Aetrix verify that MAX6501UKP085 is sourced from the original manufacturer or authorized distributors?
All MAX6501UKP085 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 meets industry standards.
7.What is the process for return or replacement of MAX6501UKP085?
All MAX6501UKP085 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6501UKP085, 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 part is unused and in its original packaging.
Return procedure for MAX6501UKP085:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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Analog Devices Inc./Maxim Integrated
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