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Analog Devices Inc./Maxim Integrated MAX6505UTP100+T
- Part No.:
- MAX6505UTP100+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Thermostats - Solid State
- Package:
- SOT-23-6
- Datasheet:
-
MAX6505UTP100+T.pdf
- Description:
- THERMOSTAT 100DEG ACT LO SOT23-6
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MAX6505UTP100+T from Maxim Integrated is a dual-threshold, open-drain temperature switch with factory-programmed +100°C ALARM trip point and user-selectable WARN offset (ΔTAW = +5°C, +10°C, +20°C, or +30°C). It operates from +2.5V to +5.5V, consumes 30µA typical supply current, and delivers ±0.5°C typical threshold accuracy over −40°C to +125°C. It is used in microprocessor thermal monitoring and fail-safe fan control systems.
For engineers reviewing the MAX6505UTP100+T datasheet, MAX6505UTP100+T pinout, MAX6505UTP100+T application, or MAX6505UTP100+T equivalent, key selection criteria include its open-drain output architecture, SOT23-6 package, pin-selectable ΔTAW, −40°C to +125°C operating range, and absence of external components for trip-point configuration.
Technical Context
The MAX6505UTP100+T integrates two precision bandgap references-one with positive and one with negative temperature coefficient-to generate a stable, temperature-dependent trip voltage. Its comparator-based architecture triggers ALARM when die temperature exceeds +100°C and WARN when temperature crosses (100°C − ΔTAW), with hysteresis applied per output type: 2°C on ALARM and 5°C or 10°C on WARN depending on ΔTAW setting.
Control pins S0 and S1 determine ΔTAW via discrete logic levels (GND/VCC), enabling four fixed offsets without software or external circuitry. The device requires no calibration, uses a single 0.1µF VCC bypass capacitor, and maintains functional integrity across full supply (2.5V–5.5V) and temperature (−40°C to +125°C) ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +5.5V - supports direct interface with common logic rails and low-voltage microcontrollers. |
| ALARM Trip Temperature | +100°C (factory-programmed) - fixed threshold enables deterministic thermal shutdown at critical CPU/GPU junction temperatures. |
| ΔTAW Selection | +5°C / +10°C / +20°C / +30°C - sets WARN activation point relative to ALARM, supporting staged thermal response (e.g., fan ramp before shutdown). |
| Threshold Accuracy | ±0.5°C (typ), ±5.5°C (max) - ensures reliable trip timing across industrial temperature extremes without recalibration. |
| Supply Current | 30µA (typ) - enables always-on thermal monitoring in battery-backed or ultra-low-power systems. |
| Output Type | Open-drain ALARM and WARN - allows wired-OR logic, level translation, and flexible pull-up configuration (e.g., to higher voltage rail). |
| Package | SOT23-6 - compact 2.9mm × 1.6mm footprint fits under socketed µPs or in space-constrained PCB layouts. |
Pinout & Package
SOT23-6 package: 2.9mm × 1.6mm × 1.1mm body, gull-wing leads, RoHS-compliant lead-free finish (+T suffix), thermal resistance θJA = 115°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | WARN | Open-drain active-low warning output - asserts low when TDIE ≥ (100°C − ΔTAW); requires external pull-up. |
| 2 | GND | Analog/digital ground reference - must be connected directly to low-impedance system ground plane. |
| 3 | S1 | Delta-T select input - logic level (GND/VCC) configures upper ΔTAW value (20°C or 30°C when high). |
| 4 | VCC | Positive supply input - bypass with 0.1µF ceramic capacitor placed ≤2mm from pin to minimize noise-induced false trips. |
| 5 | S0 | Delta-T select input - logic level (GND/VCC) configures lower ΔTAW value (5°C or 10°C when low). |
| 6 | ALARM | Open-drain active-low alarm output - asserts low when TDIE ≥ +100°C; drives interrupt lines or latch circuits. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed +100°C trip point | Eliminates need for external resistors or trimming; guarantees repeatable thermal response across production lots. |
| Pin-selectable ΔTAW | Enables hardware-configurable warning margin without firmware changes-supports design reuse across multiple thermal profiles. |
| ±0.5°C typical threshold accuracy | Reduces safety margin requirements in thermal management algorithms, allowing tighter operating envelopes. |
| No external components required | Minimizes BOM count and board area; removes tolerance stack-up errors from resistor-based trip networks. |
| 30µA typical supply current | Permits continuous monitoring in always-on subsystems (e.g., BIOS/UEFI thermal agents) without measurable battery drain. |
Applications
| Microprocessor Thermal Monitoring | Fan Speed Control |
|---|---|
|
Use Scenario: Monitoring CPU die temperature in high-speed x86 or ARM-based servers and workstations. IC Role / Device Role / Timing Role: Dual-output thermal sensor providing early-warning (WARN) and critical-shutdown (ALARM) signals to host controller. Use Value: Enables staged thermal response-fan activation at 90°C (ΔTAW = +10°C) and forced reset at 100°C-preventing thermal runaway without software latency. |
Use Scenario: Regulating cooling fan speed in embedded industrial controllers based on ambient or heatsink temperature. IC Role / Device Role / Timing Role: Hardware-based thermal trigger generating asynchronous control signals independent of MCU firmware state. Use Value: Guarantees fan activation even during MCU lockup or boot failure, improving system reliability and MTBF. |
| Power Supply Overtemperature Protection | Industrial Motor Drive Thermal Safeguard |
|
Use Scenario: Detecting overheating in DC-DC converter modules or AC-DC power supplies. IC Role / Device Role / Timing Role: Standalone overtemperature cutoff that disables PWM gate drivers or latches off primary-side MOSFETs. Use Value: Provides fail-safe shutdown within microseconds of exceeding +100°C, preventing MOSFET thermal destruction before protection ICs respond. |
Use Scenario: Monitoring IGBT junction temperature in variable-frequency motor drives operating in harsh environments. IC Role / Device Role / Timing Role: Direct-die thermal monitor mounted on heatsink near power stage, feeding WARN/ALARM to safety PLC or drive controller. Use Value: Delivers deterministic trip behavior unaffected by communication delays or software watchdog timeouts-critical for SIL-2 compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-threshold temperature switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6506UTP100+T | Push-pull (active-high) outputs instead of open-drain; identical trip points and ΔTAW selection. | Requires no external pull-ups; better suited for direct GPIO interfacing with 3.3V/5V MCUs lacking open-drain support. | Select MAX6506UTP100+T when driving CMOS inputs directly or when minimizing external components beyond pull-ups is critical. |
| LM75BIMM/NOPB | I²C digital output, single threshold (+100°C), ±2°C accuracy, 250µA supply current, SO-8 package. | Provides programmable thresholds and temperature readback but lacks dual-output staging and hardware-only operation. | Select LM75BIMM/NOPB only if system requires temperature telemetry or software-adjustable thresholds; not suitable for fail-safe hardware shutdown. |
Compared with MAX6506UTP100+T, the MAX6505UTP100+T offers open-drain flexibility for wired-OR fault signaling and level translation, while LM75BIMM/NOPB trades deterministic hardware response for digital configurability and measurement capability-making it unsuitable for safety-critical, zero-latency shutdown paths.
Availability
MAX6505UTP100+T is available at Aetrix Electronics and suitable for microprocessor thermal monitoring, fan control, power supply overtemperature protection, and industrial motor drive thermal safeguard applications requiring stable component supply and long-term lifecycle continuity.
Supply support for MAX6505UTP100+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 demanding industrial, computing, and communications applications.
The MAX6505–MAX6508 family was engineered specifically for hardware-based, dual-threshold thermal management-delivering deterministic, zero-software-dependency temperature switching in space- and power-constrained systems.
FAQ
What is the exact factory-programmed ALARM trip temperature for MAX6505UTP100+T?
The MAX6505UTP100+T has a fixed, factory-programmed ALARM trip temperature of +100°C, confirmed in Table 3 of the official datasheet. This value is laser-trimmed during production and does not require external calibration. The WARN output activates at (100°C − ΔTAW), where ΔTAW is set via S0/S1 pins. No field adjustment of the +100°C threshold is possible.
Does MAX6505UTP100+T require external pull-up resistors on its outputs?
Yes, MAX6505UTP100+T requires external pull-up resistors on both ALARM and WARN pins because they are open-drain outputs. Typical values range from 10kΩ to 100kΩ, selected based on rise time requirements and bus loading. The datasheet specifies RPULLUP = 100kΩ for characterization; lower values reduce rise time but increase quiescent current.
How is the WARN trip temperature determined for MAX6505UTP100+T?
The WARN trip temperature for MAX6505UTP100+T is calculated as (100°C − ΔTAW), where ΔTAW is selected using S0 and S1 pin states: GND/GND = +5°C, GND/VCC = +10°C, VCC/GND = +20°C, VCC/VCC = +30°C. For example, with S0 = GND and S1 = VCC, WARN asserts at +90°C. This relationship is fixed and guaranteed across temperature and supply voltage.
What is the maximum allowable supply voltage for MAX6505UTP100+T?
The absolute maximum supply voltage for MAX6505UTP100+T is +6V, but the recommended operating range is +2.5V to +5.5V per the Electrical Characteristics table. Operation above +5.5V risks permanent damage, while operation below +2.5V may cause undefined output behavior or failure to assert outputs. The device is fully specified and tested across the +2.5V to +5.5V range.
Can MAX6505UTP100+T be used in automotive under-hood applications?
MAX6505UTP100+T is rated for −40°C to +125°C operating temperature and qualified per JEDEC standards for industrial use, but it is not AEC-Q100 qualified. While its temperature range covers many under-hood environments, Aetrix Electronics does not recommend MAX6505UTP100+T for safety-critical automotive applications without additional system-level validation and qualification testing per ISO 26262 requirements.
MAX6505UTP100+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Trip Temperature Threshold:
- Hot
- Switching Temperature:
- 100°C
- Accuracy:
- ±4°C
- Current - Output (Max):
- 20mA
- Output Type:
- Open Drain
- Output:
- Active Low
- Output Function:
- /OverTemp, /Warn
- Selectable Hysteresis:
- No
- Features:
- Delta Select Inputs
- Voltage - Supply:
- 2.5 V ~ 5.5 V
- Current - Supply:
- 40µA
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- SOT-6
MAX6505UTP100+T FAQ
1.How can I place an order for MAX6505UTP100+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6505UTP100+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 MAX6505UTP100+T reliable?
The price and inventory of MAX6505UTP100+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6505UTP100+T is usually 5 days.
3.What payment methods are accepted for MAX6505UTP100+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6505UTP100+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6505UTP100+T?
MAX6505UTP100+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6505UTP100+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 MAX6505UTP100+T?
For technical support, including MAX6505UTP100+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6505UTP100+T requirements.
6.How does Aetrix verify that MAX6505UTP100+T is sourced from the original manufacturer or authorized distributors?
All MAX6505UTP100+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 MAX6505UTP100+T meets industry standards.
7.What is the process for return or replacement of MAX6505UTP100+T?
All MAX6505UTP100+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6505UTP100+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 MAX6505UTP100+T part is unused and in its original packaging.
Return procedure for MAX6505UTP100+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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