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Analog Devices Inc./Maxim Integrated MAX6512UT115
- Part No.:
- MAX6512UT115
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Thermostats - Solid State
- Package:
- SOT-23-6
- Datasheet:
-
MAX6512UT115.pdf
- Description:
- REMOTE TEMPERATURE SWITCH
- Quantity:
- Payment:
- Shipping:
Inventory:667
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Product details
Overview
MAX6512UT115 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 in CPU thermal monitoring and microprocessor reset circuits.
For engineers reviewing the MAX6512UT115 datasheet, MAX6512UT115 pinout, MAX6512UT115 application, or MAX6512UT115 equivalent, this page delivers verified technical context, exact pin functions, real-world use cases for overtemperature protection, and validated alternative parts with documented functional differences.
Technical Context
The MAX6512UT115 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 a fixed +115°C factory-programmed trip threshold with ±3°C accuracy over TA = –5°C to +55°C and ±5°C over TA = –40°C to +85°C. Hysteresis is selected via HYST pin logic level (VDD = 10°C, GND = 5°C), preventing output chatter near threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Threshold | +115°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 in controlled ambient environments |
| Hysteresis | PIN-selectable 5°C or 10°C - prevents oscillation during slow temperature transitions near trip point |
| Supply Voltage Range | +3.0V to +5.5V - compatible with standard logic and microcontroller I/O rails |
| Supply Current | 400µA typical - enables low-power thermal monitoring in battery-backed or always-on systems |
| Response Time | 70–120ms - provides fast reaction to rapid thermal events without excessive noise sensitivity |
| Output Type | Active-low open-drain - allows wired-OR configuration and direct interface to µP reset/interrupt inputs |
Pinout & Package
MAX6512UT115 is housed in a 6-pin SOT23-6 package (drawing code U6F-6), with 0.95mm pitch, 2.9mm × 1.6mm footprint, and exposed pad not present. Pin 1 is marked by a dot or chamfered corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Power supply input | Must be bypassed to GND with 0.1µF ceramic capacitor; supplies internal reference and comparator circuitry |
| GND (Pin 2) | Ground reference | Common return path for supply and sensing circuitry; must be low-impedance connection |
| HYST (Pin 3) | Hysteresis selection input | CMOS-compatible; tie to VDD for 10°C hysteresis, GND for 5°C; floating not allowed |
| TOVER (Pin 4) | Active-low open-drain output | Sinks current only; requires external pull-up to assert logic high; drives µP reset or interrupt lines |
| DXN (Pin 5) | Negative sense terminal | Connects to cathode of external P-N junction; must be tied to GND for proper biasing |
| DXP (Pin 6) | Positive sense terminal | Connects to anode of external P-N junction; steers measurement current through remote diode |
Key Features
| Feature | Design Value |
|---|---|
| Remote junction temperature sensing | Measures temperature at external diode-connected transistor (e.g., MMBT3904), enabling die-level CPU or ASIC thermal monitoring |
| Factory-trimmed +115°C threshold | Eliminates need for external calibration or resistor networks; guarantees trip point without user adjustment |
| Insensitivity to series parasitic resistance | Supports PCB trace lengths up to 100Ω series resistance with <1°C trip error - simplifies layout routing |
| Sub-120ms response time | Enables timely intervention before thermal damage occurs in high-speed processors or power modules |
| Low 400µA quiescent current | Minimizes system power overhead in always-monitoring applications such as server baseboards or industrial controllers |
Applications
| CPU Thermal Monitoring | Fan Control Interface |
|---|---|
Use Scenario: Monitoring die temperature of high-speed x86 or ARM processors during peak load conditions. IC Role / Device Role / Timing Role: Remote temperature switch providing overtemperature signal to processor reset controller or system management unit. Use Value: Prevents thermal runaway by triggering hard reset before junction temperature exceeds safe operating limit. |
Use Scenario: Activating cooling fans in embedded computing modules when ambient or component temperature rises. IC Role / Device Role / Timing Role: Open-drain alarm output directly pulls down fan enable line or drives external MOSFET gate. Use Value: Enables simple, low-component-count fan control without requiring microcontroller firmware intervention. |
| Battery Pack Protection | Industrial Power Module Monitoring |
Use Scenario: Detecting unsafe cell temperature rise in multi-cell Li-ion battery packs during charging or discharge. IC Role / Device Role / Timing Role: Overtemperature switch interfacing with battery management system (BMS) fault logic or charger disable input. Use Value: Adds hardware-level thermal cutoff independent of BMS software, improving safety compliance. |
Use Scenario: Monitoring heatsink or IGBT junction temperature in motor drives or UPS inverters. IC Role / Device Role / Timing Role: Remote sensing switch asserting shutdown signal to gate driver or PWM controller upon overtemperature. Use Value: Provides fast, deterministic thermal protection without latency introduced by digital temperature sensors or ADC polling. |
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 | Same +115°C threshold and SOT23-6 package, but features active-low CMOS output instead of open-drain | Requires no external pull-up; unsuitable for wired-OR or level-shifting interfaces | Select when driving CMOS inputs directly and shared bus operation is unnecessary |
| LM75BIMM-3/NOPB | Digital I²C temperature sensor with programmable thresholds; no remote diode interface; ±2°C accuracy at +25°C | Provides full temperature readback and configurable hysteresis, but lacks dedicated overtemperature alarm output | Select when system requires temperature telemetry and flexible trip configuration over simple hardware alarm |
Compared with MAX6512UT115, MAX6511UT115 offers simpler drive capability but less interface flexibility, while LM75BIMM-3/NOPB adds digital configurability at the cost of increased software dependency and slower response.
Availability
MAX6512UT115 is available at Aetrix Electronics and suitable for CPU thermal monitoring, battery pack protection, and industrial power module monitoring requiring stable component supply and guaranteed +115°C trip behavior.
Supply support for MAX6512UT115 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 communications applications.
The MAX651x family was developed specifically for low-cost, high-reliability remote temperature monitoring using standard diode-connected transistors - targeting thermal management in space-constrained, cost-sensitive systems.
FAQ
What is the exact temperature trip threshold of the MAX6512UT115?
The MAX6512UT115 has a factory-programmed temperature trip threshold of +115°C. This value is laser-trimmed during production and specified with ±3°C accuracy over ambient temperatures from –5°C to +55°C, and ±5°C over –40°C to +85°C. The threshold is fixed and non-adjustable.
Does the MAX6512UT115 require an external diode, and what type is recommended?
Yes, the MAX6512UT115 requires an external P-N junction - typically a diode-connected NPN transistor such as MMBT3904, SST3904, or KST3904-TF. These devices must have base shorted to collector. Discrete diodes are not recommended due to inconsistent VBE characteristics and higher series resistance.
How does the HYST pin affect the MAX6512UT115's operation?
The HYST pin on the MAX6512UT115 selects hysteresis: connect to VDD for 10°C hysteresis or to GND for 5°C hysteresis. This setting determines the temperature drop required before the output deasserts after crossing the +115°C threshold. The pin must not be left floating, as it is CMOS-input and undefined states cause unreliable behavior.
Can the MAX6512UT115 drive a microprocessor reset input directly?
Yes, the MAX6512UT115's active-low open-drain TOVER output is designed for direct interface to µP reset inputs. An external pull-up resistor (typically 4.7kΩ to VCC) is required. When temperature exceeds +115°C, TOVER sinks current to pull the reset line low, initiating processor reset - no additional buffering or level translation is needed.
What is the supply current consumption of the MAX6512UT115 across temperature?
The MAX6512UT115 consumes 400µA typical supply current at +25°C, with variation from ~340µA at –40°C to ~440µA at +85°C. This includes current drawn by the internal current source driving the external diode. Total system current also depends on diode leakage and external capacitor size.
MAX6512UT115 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 FAQ
1.How can I place an order for MAX6512UT115 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6512UT115 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 reliable?
The price and inventory of MAX6512UT115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6512UT115 is usually 5 days.
3.What payment methods are accepted for MAX6512UT115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6512UT115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6512UT115?
MAX6512UT115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6512UT115 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?
For technical support, including MAX6512UT115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6512UT115 requirements.
6.How does Aetrix verify that MAX6512UT115 is sourced from the original manufacturer or authorized distributors?
All MAX6512UT115 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 meets industry standards.
7.What is the process for return or replacement of MAX6512UT115?
All MAX6512UT115 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6512UT115, 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 part is unused and in its original packaging.
Return procedure for MAX6512UT115:
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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