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Analog Devices Inc./Maxim Integrated MAX6512UT085-T
- Part No.:
- MAX6512UT085-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Thermostats - Solid State
- Package:
- SOT-23-6
- Datasheet:
-
MAX6512UT085-T.pdf
- Description:
- REMOTE TEMPERATURE SWITCH
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
The MAX6512UT085-T from Maxim Integrated is a fully integrated remote temperature switch using an external P-N junction (e.g., diode-connected transistor) to monitor remote die or board temperature. It features a factory-programmed +85°C trip threshold, ±3°C accuracy over –5°C to +55°C ambient, 5°C/10°C pin-selectable hysteresis, open-drain active-low output, and operates from +3.0V to +5.5V. It is used for microprocessor reset signaling in CPU thermal monitoring systems.
For engineers reviewing the MAX6512UT085-T datasheet, MAX6512UT085-T pinout, MAX6512UT085-T application, or MAX6512UT085-T equivalent, key selection criteria include remote-sensing junction compatibility, open-drain drive capability for µP reset/interrupt lines, hysteresis configuration via HYST pin, supply voltage range tolerance, and SOT23-6 package footprint constraints.
Technical Context
The MAX6512UT085-T implements a precision chopper-stabilized amplifier to measure forward voltage across an external diode-connected transistor, converting it to temperature with minimal series-resistance sensitivity (<1°C error for ≤100Ω). Its internal bandgap reference and current-steering architecture enable stable threshold detection independent of supply voltage variation (–0.6°C/V).
It uses oversampling and integrated noise filtering to reject interference on DXP/DXN lines, requiring only a 2200pF ceramic capacitor across those pins. The open-drain TOVER output sinks up to 1mA and is designed for direct interface with microprocessor reset or interrupt inputs without pull-up dependency beyond system-level requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Threshold | +85°C factory-programmed trip point - triggers output assertion precisely at this remote junction temperature. |
| Accuracy | ±3°C (TA = –5°C to +55°C) - ensures reliable overtemperature detection within tight thermal safety margins. |
| Hysteresis | Pin-selectable 5°C or 10°C - prevents output chatter near trip point; HYST = GND selects 5°C, HYST = VDD selects 10°C. |
| Output Type | Active-low open-drain - requires external pull-up; compatible with standard µP reset/interrupt logic thresholds. |
| Supply Range | +3.0V to +5.5V - supports operation across common logic supply rails including 3.3V and 5V systems. |
| Supply Current | 400µA typical - enables low-power thermal monitoring in battery-backed or energy-constrained applications. |
| Response Time | 70–120ms - provides rapid fault detection while filtering transient thermal noise. |
Pinout & Package
MAX6512UT085-T is housed in a 6-pin SOT23-6 package (drawing code U6F-6), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads and RoHS-compliant finish (lead-free per data sheet footnote).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive power supply input | Must be bypassed to GND with 0.1µF capacitor; supplies internal reference, amplifier, and comparator. |
| GND | Ground reference | Common return for all internal circuitry and external sense junction cathode (DXN). |
| HYST | Hysteresis selection input | CMOS-compatible; logic high (VDD) sets 10°C hysteresis, logic low (GND) sets 5°C; must not float. |
| TOVER | Active-low open-drain output | Sinks current when temperature exceeds +85°C; requires external pull-up for logic-level assertion. |
| DXN | Negative sense terminal | Connects to cathode of external P-N junction (e.g., base-collector of diode-connected transistor); tied to GND. |
| DXP | Positive sense terminal | Connects to anode of external P-N junction; bias current sourced here to measure forward voltage. |
Key Features
| Feature | Design Value |
|---|---|
| Remote junction sensing | Uses external diode-connected transistor (e.g., MMBT3904) - enables accurate die-temperature monitoring of CPUs, FPGAs, or power ICs. |
| Series resistance immunity | ≤100Ω parasitic resistance adds <1°C error - simplifies PCB routing without precision trace-length matching. |
| Noise-immune measurement | Oversampling + chopper stabilization - rejects EMI from switching regulators and digital noise without external filtering beyond 2200pF cap. |
| Fast thermal response | <120ms typical - detects rapid overheating events before system damage occurs. |
| Low quiescent power | 400µA supply current - minimizes impact on battery life and thermal load in portable or always-on systems. |
Applications
| CPU Thermal Shutdown | Fan Speed Control Interface |
|---|---|
Use Scenario: Monitoring CPU die temperature in high-speed computing platforms to prevent thermal throttling or permanent damage. IC Role / Device Role / Timing Role: Remote temperature switch asserting active-low signal to processor's RESET# or THERMTRIP# input upon exceeding +85°C. Use Value: Enables deterministic, hardware-based thermal shutdown without software intervention or host CPU overhead. |
Use Scenario: Providing overtemperature alarm signal to fan controller IC or microcontroller PWM driver in embedded cooling systems. IC Role / Device Role / Timing Role: Open-drain output pulls down fan enable line or interrupts MCU when remote sensor junction reaches +85°C. Use Value: Delivers immediate, low-latency fan activation with configurable hysteresis to avoid oscillation near threshold. |
| Battery Pack Overheat Protection | Multichip Module (MCM) Thermal Guard |
Use Scenario: Detecting abnormal cell temperature rise in Li-ion battery packs during charging or discharge cycles. IC Role / Device Role / Timing Role: Interfaces with battery protection IC or charger controller via open-drain alarm output tied to interrupt pin. Use Value: Adds fail-safe hardware layer that disables charging or discharging before thermal runaway initiates. |
Use Scenario: Monitoring hotspots across stacked dies or heterogeneous chiplets in advanced MCM packaging. IC Role / Device Role / Timing Role: Measures temperature at multiple locations using discrete diode-connected transistors placed near critical logic blocks. Use Value: Provides localized, real-time thermal feedback independent of on-die sensors - essential for heterogeneous integration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar remote temperature switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6511UT085-T | Active-low CMOS output instead of open-drain; higher output drive strength (±1mA), no external pull-up required. | Better suited for direct driving of logic inputs without external components; less flexible for wired-OR or level translation. | Select when interfacing directly with CMOS inputs and minimizing BOM count is prioritized over multi-drop bus compatibility. |
| LM75BIMM-3/NOPB | I²C digital output, ±2°C accuracy, programmable threshold (not factory-set), 8-pin VSSOP package. | Requires MCU firmware support and I²C bus resources; supports dynamic threshold adjustment and multi-zone monitoring. | Select when system already uses I²C infrastructure and adaptive thermal management (e.g., gradual fan ramping) is needed. |
Compared with MAX6511UT085-T and LM75BIMM-3/NOPB, the MAX6512UT085-T offers simpler hardware integration for fixed-threshold reset signaling, lower component count due to open-drain flexibility, and faster response than digital sensors - making it optimal for cost-sensitive, single-purpose thermal alarms.
Availability
MAX6512UT085-T is available at Aetrix Electronics and suitable for CPU thermal shutdown, battery pack protection, multichip module monitoring, and fan control applications requiring stable component supply across industrial, computing, and embedded design cycles.
Supply support for MAX6512UT085-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 and mixed-signal ICs for power, sensing, and interface applications, with emphasis on reliability and integration for demanding environments.
The MAX651x family was developed specifically for low-cost, high-accuracy remote temperature monitoring in space-constrained systems where external diode sensing provides superior die-level thermal visibility versus on-chip sensors.
FAQ
What is the exact temperature trip threshold of the MAX6512UT085-T?
The MAX6512UT085-T has a factory-programmed temperature trip threshold of +85°C. This value is laser-trimmed during production and specified with ±3°C accuracy over an ambient temperature range of –5°C to +55°C, and ±5°C accuracy from –40°C to +85°C. The threshold applies to the remote P-N junction temperature, not the IC package temperature.
Can the MAX6512UT085-T be used with any NPN transistor as the remote sensor?
Yes - the MAX6512UT085-T is designed to work with diode-connected NPN transistors such as MMBT3904, SST3904, or KST3904-TF, where base and collector are shorted. These devices provide consistent VBE characteristics required for ±3°C accuracy. Large power transistors are not recommended due to process variation and inconsistent thermal coupling.
How is hysteresis configured on the MAX6512UT085-T?
Hysteresis on the MAX6512UT085-T is selected via the HYST pin: connect HYST to GND for 5°C hysteresis or to VDD for 10°C hysteresis. This pin must not be left floating, as undefined logic levels may cause unstable output behavior near the trip point. The hysteresis defines the temperature drop required before TOVER deasserts after crossing +85°C.
Does the MAX6512UT085-T require an external pull-up resistor on the TOVER pin?
Yes - because the MAX6512UT085-T features an open-drain output, a pull-up resistor is mandatory to establish a defined high logic level when the output is inactive. Typical values range from 4.7kΩ to 10kΩ to +3.3V or +5V, depending on rise time and bus loading requirements. No internal pull-up is provided.
What package type and footprint does the MAX6512UT085-T use?
The MAX6512UT085-T uses a 6-pin SOT23-6 package (drawing code U6F-6), with 0.95mm pitch, 2.9mm × 1.6mm body size, and gull-wing leads. It is not offered in TDFN - only the MAX6513 variant is available in lead-free TDFN. This SOT23-6 footprint is compatible with standard pick-and-place equipment and reflow profiles.
MAX6512UT085-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Trip Temperature Threshold:
- Hot
- Switching Temperature:
- 85°C
- Accuracy:
- ±5°C
- Current - Output (Max):
- 50mA
- Output Type:
- Open Drain
- Output:
- Active High
- Output Function:
- /OverTemp
- Selectable Hysteresis:
- Yes
- Features:
- Selectable Hysteresis
- Voltage - Supply:
- 3 V ~ 5.5 V
- Current - Supply:
- 400µA
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- SOT-23-6
MAX6512UT085-T FAQ
1.How can I place an order for MAX6512UT085-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6512UT085-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 MAX6512UT085-T reliable?
The price and inventory of MAX6512UT085-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6512UT085-T is usually 5 days.
3.What payment methods are accepted for MAX6512UT085-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6512UT085-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6512UT085-T?
MAX6512UT085-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6512UT085-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 MAX6512UT085-T?
For technical support, including MAX6512UT085-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6512UT085-T requirements.
6.How does Aetrix verify that MAX6512UT085-T is sourced from the original manufacturer or authorized distributors?
All MAX6512UT085-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 MAX6512UT085-T meets industry standards.
7.What is the process for return or replacement of MAX6512UT085-T?
All MAX6512UT085-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6512UT085-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 MAX6512UT085-T part is unused and in its original packaging.
Return procedure for MAX6512UT085-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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