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Analog Devices Inc./Maxim Integrated MAX6512UT115-T
- Part No.:
- MAX6512UT115-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Thermostats - Solid State
- Package:
- SOT-23-6
- Datasheet:
-
MAX6512UT115-T.pdf
- Description:
- REMOTE TEMPERATURE SWITCH
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6512UT115-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, asserting an active-low open-drain output when temperature exceeds +115°C. It operates from +3.0V to +5.5V, consumes 400µA typical supply current, and features pin-selectable 5°C or 10°C hysteresis. It is used for microprocessor reset signaling and overtemperature shutdown in CPU modules and battery packs.
For engineers reviewing the MAX6512UT115-T datasheet, MAX6512UT115-T pinout, MAX6512UT115-T application, or MAX6512UT115-T equivalent, this page provides verified technical context, exact pin functions, real-world use scenarios, confirmed alternatives with documented differences, and supply-chain support details for industrial thermal management designs.
Technical Context
The MAX6512UT115-T integrates a precision bandgap reference, chopper-stabilized amplifier, current source, and comparator to measure forward voltage across an external diode-connected transistor and compute temperature. Its architecture rejects series parasitic resistance up to 100Ω with <1°C error.
It implements hysteresis via CMOS-compatible HYST pin (VDD = 10°C, GND = 5°C), preventing output chatter near trip point. The open-drain TOVER output sinks current only and requires an external pull-up for logic-level compatibility with µP reset/interrupt inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Threshold | +115°C factory-programmed trip point - triggers action precisely at this junction temperature without calibration. |
| Accuracy | ±3°C over TA = -5°C to +55°C - ensures reliable alarm activation within tight thermal margins for consumer/industrial CPUs. |
| Hysteresis | PIN-selectable 5°C or 10°C - prevents oscillation during slow thermal transients; selected by tying HYST to GND or VDD. |
| Supply Range | +3.0V to +5.5V - compatible with standard logic rails and battery-backed systems without LDO overhead. |
| Supply Current | 400µA typical - enables always-on thermal monitoring in power-constrained embedded systems. |
| Response Time | 70–120ms - delivers fast overtemperature detection for immediate system protection. |
| Output Type | Active-low open-drain - interfaces directly with µP reset pins or interrupt controllers using external pull-up. |
Pinout & Package
MAX6512UT115-T is housed in a 6-pin SOT23-6 package (JEDEC MO-178AA, pkg code U6F-6), with 1.9mm × 2.9mm footprint and 1.1mm max height. Thermal pad not present; standard reflow compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive supply input | Accepts +3.0V to +5.5V; must be bypassed to GND with 0.1µF ceramic capacitor for noise immunity. |
| GND | Ground reference | System ground return for internal circuitry and DXP/DXN sensing path. |
| HYST | Hysteresis selection input | CMOS-compatible control: tie to GND for 5°C hysteresis, VDD for 10°C; must not float. |
| TOVER | Active-low open-drain output | Sinks current only; requires external pull-up to VDD or another rail; asserts low on overtemperature. |
| DXN | Negative sense terminal | Connects to cathode of external P-N junction (e.g., MMBT3904 base-collector); must be 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 | Measures temperature of external diode-connected transistor (e.g., MMBT3904) - enables accurate die-level monitoring without on-chip sensor. |
| Factory-trimmed threshold | +115°C trip point laser-trimmed at wafer test - eliminates need for external calibration or resistor networks. |
| Series resistance immunity | Supports ≤100Ω trace/wire resistance in DXP/DXN path with <1°C error - simplifies PCB layout in noisy environments. |
| Noise-immune measurement | Oversampling + chopper stabilization rejects high-frequency noise - allows routing near switching regulators without added filtering. |
| Fast response | 70–120ms thermal detection latency - meets real-time shutdown requirements for CPU and battery safety circuits. |
Applications
| CPU Thermal Shutdown | Battery Pack Overtemperature Protection |
|---|---|
Use Scenario: Monitors CPU die temperature via on-die sensing diode to prevent thermal runaway during sustained load. IC Role / Device Role / Timing Role: Remote temperature switch providing hardware-level overtemperature signal to processor reset controller. Use Value: Enables deterministic, sub-120ms shutdown before silicon damage occurs - independent of firmware or OS responsiveness. |
Use Scenario: Tracks cell stack temperature in Li-ion battery packs to halt charging/discharging above safe limits. IC Role / Device Role / Timing Role: Standalone thermal alarm interfacing with battery management system (BMS) supervisor logic. Use Value: Provides fail-safe, analog-hardwired cutoff that operates even if BMS microcontroller fails or resets. |
| Fan Speed Control Trigger | Industrial Module Temperature Alarm |
Use Scenario: Activates cooling fan when ambient or heatsink temperature exceeds +115°C in enclosed enclosures. IC Role / Device Role / Timing Role: Open-drain output drives gate of external N-channel MOSFET controlling 12V fan supply. Use Value: Eliminates need for level-shifting or additional driver IC - direct interface reduces BOM count and layout area. |
Use Scenario: Detects overheating in multichip modules (MCMs) or FPGA carrier boards where localized hot spots occur. IC Role / Device Role / Timing Role: Remote sensing node feeding alarm signal to system health monitor or PLC input. Use Value: Pin-selectable hysteresis avoids nuisance alarms during transient thermal excursions in convection-cooled systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar remote temperature switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6511UT115-T | Same threshold (+115°C), same package, but active-low CMOS output (not open-drain) | Requires no external pull-up; unsuitable for wired-OR or mixed-voltage interrupt buses | Select when driving CMOS inputs directly and board space prohibits pull-up resistor. |
| LM20BIMAX/NOPB | Analog output (2mV/°C), no built-in comparator or trip logic; requires external ADC/comparator | Enables programmable thresholds and multi-point monitoring; lacks integrated hysteresis or digital output | Select when flexible threshold configuration or temperature logging is required instead of fixed-point alarm. |
Compared with MAX6512UT115-T, MAX6511UT115-T offers simpler drive capability but less interface flexibility, while LM20BIMAX/NOPB trades integration for configurability - making MAX6512UT115-T optimal for cost-sensitive, fixed-threshold hardware shutdowns.
Availability
MAX6512UT115-T is available at Aetrix Electronics and suitable for CPU thermal shutdown, battery pack protection, and industrial module temperature alarms requiring stable component supply across production lifecycles.
Supply support for MAX6512UT115-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, with emphasis on reliability and integration.
The MAX651x family was developed specifically for low-cost, high-accuracy remote temperature monitoring in space-constrained systems using standard diode-connected transistors as sensors.
FAQ
What is the exact temperature trip point of the MAX6512UT115-T?
The MAX6512UT115-T has a factory-programmed temperature threshold of +115°C. This value is laser-trimmed during production and guaranteed over the full operating ambient range of -40°C to +85°C. Accuracy is ±3°C when ambient temperature is between -5°C and +55°C, and ±5°C across the full -40°C to +85°C range. The trip point is fixed and not user-adjustable.
Does the MAX6512UT115-T require an external pull-up resistor on the TOVER pin?
Yes, the MAX6512UT115-T features an active-low open-drain TOVER output that can only sink current. An external pull-up resistor (typically 4.7kΩ to VDD) is mandatory to establish a valid high logic level when the output is deasserted. Without it, TOVER remains floating and cannot interface reliably with microprocessor reset or interrupt inputs.
Which external transistor is recommended for use with the MAX6512UT115-T?
The MAX6512UT115-T is optimized for diode-connected transistors such as the MMBT3904 (ON Semiconductor), SST3904 (Rohm), or KST3904-TF (Samsung). These devices offer tight VBE matching and consistent forward voltage characteristics. Base must be shorted to collector to form the P-N junction; large power transistors are not recommended due to process variation.
Can the MAX6512UT115-T measure temperature accurately with long PCB traces to the remote diode?
Yes - the MAX6512UT115-T is designed to tolerate up to 100Ω of series resistance in the DXP/DXN path with less than 1°C trip-point error. This allows use of longer PCB traces or connectors without significant accuracy degradation, provided the DXP/DXN pair is routed as a tightly coupled differential pair and shielded from noise sources like switching regulators.
How is hysteresis configured on the MAX6512UT115-T?
Hysteresis on the MAX6512UT115-T is set via the HYST pin: connect HYST to GND for 5°C hysteresis or to VDD for 10°C hysteresis. This CMOS-compatible input must not be left floating. Hysteresis defines the temperature gap between trip assertion (+115°C) and deassertion (+115°C minus hysteresis), preventing output oscillation near the threshold.
MAX6512UT115-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:
- 115°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
MAX6512UT115-T FAQ
1.How can I place an order for MAX6512UT115-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6512UT115-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 MAX6512UT115-T reliable?
The price and inventory of MAX6512UT115-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6512UT115-T is usually 5 days.
3.What payment methods are accepted for MAX6512UT115-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6512UT115-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6512UT115-T?
MAX6512UT115-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6512UT115-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 MAX6512UT115-T?
For technical support, including MAX6512UT115-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6512UT115-T requirements.
6.How does Aetrix verify that MAX6512UT115-T is sourced from the original manufacturer or authorized distributors?
All MAX6512UT115-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 MAX6512UT115-T meets industry standards.
7.What is the process for return or replacement of MAX6512UT115-T?
All MAX6512UT115-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6512UT115-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 MAX6512UT115-T part is unused and in its original packaging.
Return procedure for MAX6512UT115-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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