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Analog Devices Inc./Maxim Integrated MAX6512UT125-T
- Part No.:
- MAX6512UT125-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Thermostats - Solid State
- Package:
- SOT-23-6
- Datasheet:
-
MAX6512UT125-T.pdf
- Description:
- REMOTE TEMPERATURE SWITCH
- Quantity:
- Payment:
- Shipping:
Inventory:17,500
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Product details
Overview
MAX6512UT125-T from Maxim Integrated is a remote temperature switch IC that uses an external P-N junction (e.g., diode-connected transistor) to monitor remote die or board temperature, with a factory-programmed +125°C trip threshold, ±5°C accuracy over –40°C to +85°C ambient, 5°C/10°C pin-selectable hysteresis, and open-drain active-low output for µP reset or interrupt assertion in CPU thermal protection circuits.
For engineers reviewing the MAX6512UT125-T datasheet, MAX6512UT125-T pinout, MAX6512UT125-T application, or MAX6512UT125-T equivalent, key selection criteria include remote-sensing junction interface compatibility, open-drain drive capability into microprocessor reset inputs, hysteresis configuration via HYST pin, and operation across +3.0V to +5.5V supply with <600µA quiescent current.
Technical Context
The MAX6512UT125-T integrates a precision bandgap reference, chopper-stabilized amplifier, current source, and comparator to measure forward voltage of an external diode-connected transistor and compute temperature. It continuously steers bias currents through DXP/DXN and rejects series parasitic resistance up to 100Ω with <1°C error.
Its open-drain TOVER output sinks current only and requires an external pull-up; the HYST pin selects hysteresis (5°C at GND, 10°C at VDD) to prevent output chatter near trip point; response time is 70–120ms with 2200pF noise-filtering capacitor on DXP/DXN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Threshold | +125°C factory-programmed trip point - triggers output assertion when remote junction exceeds this fixed value. |
| Accuracy | ±5°C over –40°C to +85°C ambient - defines maximum deviation between actual and reported trip temperature under full operating range. |
| Hysteresis | Pin-selectable 5°C (HYST = GND) or 10°C (HYST = VDD) - prevents oscillation during slow temperature transitions near threshold. |
| Supply Range | +3.0V to +5.5V - supports direct connection to common logic rails without regulation. |
| Supply Current | 400µA typical, ≤600µA max - enables low-power thermal monitoring in battery-backed or energy-constrained systems. |
| Response Time | 70–120ms - determines minimum detectable rate of temperature rise before output assertion. |
| Output Type | Active-low open-drain - requires external pull-up; compatible with µP reset/interrupt inputs and wired-OR bus configurations. |
Pinout & Package
MAX6512UT125-T is housed in a 6-pin SOT23-6 package (drawing code U6F-6), with 1.6mm × 2.9mm footprint and 0.95mm pitch. Thermal pad not present; standard surface-mount reflow compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive power supply input | Accepts +3.0V to +5.5V; must be bypassed to GND with 0.1µF ceramic capacitor for stable operation. |
| GND | Ground reference | System ground return for all internal circuitry and sensing bias paths. |
| HYST | Hysteresis select input | CMOS-compatible digital input: logic low = 5°C hysteresis, logic high = 10°C hysteresis; must not float. |
| TOVER | Open-drain active-low output | Sinks current only; asserts low when temperature exceeds +125°C; requires external pull-up resistor. |
| DXN | Negative sense junction terminal | Connects to cathode of external diode-connected transistor; must be tied to GND. |
| DXP | Positive sense junction terminal | Connects to anode of external diode-connected transistor; forms remote temperature sensing path with DXN. |
Key Features
| Feature | Design Value |
|---|---|
| Remote junction sensing | Measures temperature using external P-N junction (e.g., MMBT3904), enabling accurate die-level monitoring of CPUs or power ICs. |
| Insensitivity to series resistance | Supports up to 100Ω parasitic resistance in DXP/DXN lines with <1°C trip error - simplifies PCB routing and eliminates calibration for trace resistance. |
| Noise-immune measurement | Uses oversampling and chopper stabilization to reject noise on DXP/DXN; enhanced by 2200pF capacitor placement adjacent to pins. |
| Fast thermal response | 70–120ms output assertion delay allows detection of rapid thermal events such as CPU load spikes or fan failure. |
| Low quiescent power | 400µA typical supply current enables integration into always-on thermal watchdog circuits without significant battery drain. |
Applications
| CPU Thermal Protection | Fan Control Interface |
|---|---|
Use Scenario: Monitoring processor die temperature in high-speed computing systems to prevent thermal throttling or shutdown. IC Role / Device Role / Timing Role: Remote temperature switch asserting active-low signal to microprocessor reset input upon exceeding +125°C. Use Value: Enables hardware-level thermal safety without software intervention; hysteresis prevents false resets during transient overshoot. |
Use Scenario: Triggering cooling fan activation when system temperature crosses critical threshold in embedded controllers. IC Role / Device Role / Timing Role: Open-drain output drives base/gate of external NPN transistor or MOSFET controlling fan power rail. Use Value: Direct hardware control eliminates MCU polling latency; 5°C/10°C hysteresis avoids fan cycling near trip point. |
| Battery Pack Overtemperature Cut-off | Multichip Module (MCM) Thermal Monitoring |
Use Scenario: Detecting unsafe cell temperature in Li-ion battery packs during fast charging or high-load discharge. IC Role / Device Role / Timing Role: Interfaces with battery management system (BMS) supervisor IC via open-drain alarm line. Use Value: Provides fail-safe thermal cutoff independent of BMS firmware; ±5°C accuracy ensures reliable margin above chemistry limits. |
Use Scenario: Monitoring hotspots across stacked dies or heterogeneous chiplets in advanced packaging. IC Role / Device Role / Timing Role: Each MAX6512UT125-T monitors one die's on-chip diode, feeding discrete alarms to system health controller. Use Value: Enables per-die thermal awareness without shared analog front-end; small SOT23 footprint minimizes area overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar remote temperature switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6511UT125-T | Active-low CMOS output (not open-drain); same threshold, accuracy, and package. | Directly drives logic inputs without pull-up; unsuitable for wired-OR or level translation. | Select when interfacing with CMOS-compatible reset inputs requiring voltage-driven assertion. |
| LM75BIMM-3/NOPB | I²C digital output, ±2°C accuracy, programmable thresholds, 8-pin VSSOP package. | Requires MCU firmware support; offers adjustable trip points and temperature readback, not simple switch action. | Select when system needs configurable thresholds or temperature telemetry, not hardware-only alarm. |
Compared with MAX6511UT125-T, MAX6512UT125-T provides open-drain flexibility for shared interrupt buses; compared with LM75BIMM-3/NOPB, it delivers deterministic, zero-software thermal response ideal for safety-critical reset functions.
Availability
MAX6512UT125-T is available at Aetrix Electronics and suitable for CPU thermal protection, battery pack safety monitoring, and multichip module temperature supervision requiring stable component supply across industrial and computing applications.
Supply support for MAX6512UT125-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 industrial, computing, and automotive applications, emphasizing high reliability and integration.
The MAX651x family targets cost-sensitive, space-constrained thermal management where hardware-based overtemperature response is mandatory - delivering factory-trimmed accuracy without calibration or digital interface overhead.
FAQ
What is the exact temperature trip point of the MAX6512UT125-T?
The MAX6512UT125-T has a factory-programmed temperature threshold of +125°C. This value is laser-trimmed during production and is fixed for the device; it triggers the open-drain TOVER output to assert low when the remote P-N junction temperature exceeds this point. Accuracy is specified as ±5°C over the full –40°C to +85°C ambient operating range.
Can the MAX6512UT125-T be used with a CPU that has an integrated thermal diode?
Yes, the MAX6512UT125-T is explicitly designed to interface with on-die thermal diodes found in modern CPUs and SoCs. Its DXP/DXN inputs connect directly to the diode's anode and cathode, and its architecture compensates for series resistance and noise - making it suitable for accurate die-temperature monitoring without additional signal conditioning circuitry.
How is hysteresis configured on the MAX6512UT125-T?
Hysteresis on the MAX6512UT125-T is selected via the HYST pin: tie HYST to GND for 5°C hysteresis or to VDD for 10°C hysteresis. This setting determines the temperature drop required after trip-point crossing before TOVER deasserts. The pin must not be left floating, as undefined logic levels may cause erratic output behavior.
Does the MAX6512UT125-T require an external capacitor on the DXP/DXN lines?
Yes, a 2200pF ceramic capacitor must be placed between DXP and DXN, located physically close to the MAX6512UT125-T package. This capacitor filters noise and maintains trip-threshold accuracy; deviations of ±50% from 2200pF can introduce up to ±1°C error. Larger values degrade response time and increase measurement inaccuracy.
What is the maximum sink current capability of the MAX6512UT125-T's TOVER output?
The TOVER output of the MAX6512UT125-T is rated to sink up to 1mA while maintaining VOL ≤ 0.2V (at VDD = 3.3V). For higher current loads (e.g., driving LED indicators or transistor bases), an external buffer or level-shifting stage is required. The output is not designed to source current.
MAX6512UT125-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:
- 125°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
MAX6512UT125-T FAQ
1.How can I place an order for MAX6512UT125-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6512UT125-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 MAX6512UT125-T reliable?
The price and inventory of MAX6512UT125-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6512UT125-T is usually 5 days.
3.What payment methods are accepted for MAX6512UT125-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6512UT125-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6512UT125-T?
MAX6512UT125-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6512UT125-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 MAX6512UT125-T?
For technical support, including MAX6512UT125-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6512UT125-T requirements.
6.How does Aetrix verify that MAX6512UT125-T is sourced from the original manufacturer or authorized distributors?
All MAX6512UT125-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 MAX6512UT125-T meets industry standards.
7.What is the process for return or replacement of MAX6512UT125-T?
All MAX6512UT125-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6512UT125-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 MAX6512UT125-T part is unused and in its original packaging.
Return procedure for MAX6512UT125-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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