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Analog Devices Inc./Maxim Integrated MAX6511UT115-T
- Part No.:
- MAX6511UT115-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Thermostats - Solid State
- Package:
- SOT-23-6
- Datasheet:
-
MAX6511UT115-T.pdf
- Description:
- REMOTE TEMPERATURE SWITCH
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
The MAX6511UT115-T from Maxim Integrated is a factory-programmed, remote temperature switch with +115°C trip threshold, active-low CMOS output, and 6-pin SOT23 package. It uses an external P-N junction (e.g., diode-connected transistor) for remote die temperature sensing in CPUs or power ICs, delivers ±3°C accuracy over -5°C to +55°C ambient, features pin-selectable 5°C/10°C hysteresis, and consumes only 400µA typical supply current. It is deployed in high-speed CPU thermal monitoring and fan control circuits.
For engineers reviewing the MAX6511UT115-T datasheet, MAX6511UT115-T pinout, MAX6511UT115-T application, or MAX6511UT115-T equivalent, key selection criteria include trip-point accuracy across ambient range, hysteresis configuration flexibility, low quiescent current for always-on thermal supervision, compatibility with standard diode-connected transistors (e.g., MMBT3904), and SOT23-6 footprint constraints in space-constrained embedded systems.
Technical Context
The MAX6511UT115-T integrates a precision bandgap reference, chopper-stabilized amplifier, current source, and comparator to measure forward voltage of an external P-N junction and compute temperature. Its architecture rejects series parasitic resistance up to 100Ω with <1°C error and employs oversampling and integration for noise immunity on DXP/DXN lines.
It asserts TOVER low when remote junction temperature exceeds +115°C, deasserts only after temperature falls below (115°C – hysteresis), and supports hysteresis selection via HYST pin logic level (VDD = 10°C, GND = 5°C). The active-low CMOS output drives microprocessor reset or interrupt inputs directly without pull-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Threshold | +115°C factory-programmed trip point - defines exact overtemperature shutdown activation point for thermal protection. |
| Accuracy | ±3°C at TA = -5°C to +55°C - ensures reliable trip timing in commercial ambient environments. |
| Supply Voltage Range | +3.0V to +5.5V - compatible with standard 3.3V and 5V system rails without level-shifting. |
| Supply Current | 400µA typical - enables low-power thermal supervision in battery-backed or energy-sensitive systems. |
| Hysteresis | PIN-selectable 5°C or 10°C - prevents output chatter near trip point; selected by HYST pin voltage level. |
| Response Time | 70–120ms - provides fast thermal fault detection while filtering transient spikes via internal averaging. |
| Output Type | Active-low CMOS - directly interfaces µP reset/interrupt pins; no external pull-up required. |
Pinout & Package
Package: 6-pin SOT23-6 (package code U6F-6), 2.9mm × 1.6mm footprint, 0.95mm height, lead-free option not available for this variant (RoHS/lead-free status: No per Maxim ordering info).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | 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 | Common return path for supply and sensing circuitry; connects to system ground plane. |
| HYST | Hysteresis select input | CMOS-compatible logic input: VDD = 10°C hysteresis, GND = 5°C hysteresis; must not float. |
| TOVER | Active-low CMOS output | Drives low when TREMOTE ≥ +115°C; sinks up to 1mA; directly resets µP or triggers alarm logic. |
| DXN | Negative sense terminal | Connects to cathode of external diode-connected transistor; must be tied to GND. |
| DXP | Positive sense terminal | Connects to anode of external diode-connected transistor; pairs with DXN for differential remote sensing. |
Key Features
| Feature | Design Value |
|---|---|
| Remote junction sensing | Measures temperature using external P-N junction (e.g., MMBT3904), enabling die-level monitoring of CPUs or power ICs. |
| Factory-trimmed threshold | +115°C trip point laser-trimmed at wafer test - eliminates need for external calibration components or firmware compensation. |
| Parasitic resistance immunity | Supports ≤100Ω series resistance in DXP/DXN path with <1°C trip error - simplifies PCB routing and connector use. |
| Noise-immune measurement | Oversampling + chopper stabilization rejects EMI from switching regulators and digital noise - reduces need for shielding or guard traces. |
| Fast thermal response | 70–120ms typical response time - balances speed and noise rejection for reliable real-time overtemperature detection. |
Applications
| CPU Thermal Monitoring | Fan Control Activation |
|---|---|
Use Scenario: Real-time die temperature supervision of high-performance x86 or ARM processors during burst workloads. IC Role / Device Role / Timing Role: Remote temperature switch asserting TOVER to trigger hardware reset or OS-initiated throttling before thermal throttling limits are exceeded. Use Value: Prevents silicon damage by enforcing hard +115°C trip limit with ±3°C accuracy, eliminating reliance on less accurate on-die thermal diodes alone. |
Use Scenario: Automatic cooling fan enablement in industrial PCs or network switches when ambient or component temperature rises. IC Role / Device Role / Timing Role: Active-low CMOS output directly drives gate of N-channel MOSFET controlling 12V fan supply. Use Value: Enables immediate fan spin-up with no software latency; hysteresis prevents rapid cycling near trip point. |
| Battery Pack Overtemperature Protection | Multichip Module (MCM) Thermal Guard |
Use Scenario: Safety cutoff for Li-ion battery packs in portable medical or test equipment during charging or discharge faults. IC Role / Device Role / Timing Role: Monitors temperature of cell stack via external diode; TOVER asserts to disable charge/discharge FETs through protection IC interface. Use Value: Adds hardware-level fail-safe beyond BMS firmware, meeting IEC 62368-1 thermal safety requirements with deterministic response. |
Use Scenario: Thermal supervision of stacked ASICs or RF front-end modules where localized hot spots risk interposer delamination. IC Role / Device Role / Timing Role: Dedicated remote sensor per die in MCM; TOVER signals thermal violation to system management controller (SMC). Use Value: Provides independent, calibrated trip point per critical zone - avoids single-point failure of integrated thermal sensors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar remote temperature switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6512UT115-T | Same +115°C threshold and SOT23-6 package, but open-drain active-low output requiring external pull-up. | Suitable where wired-OR bus or level translation is needed; not direct drop-in for CMOS-input-only systems. | Select if interfacing with legacy µP interrupt pins requiring open-drain compatibility or shared-bus signaling. |
| LM20BIM7-115/NOPB | Fixed +115°C trip, SOT23-5 package, open-drain output, ±4°C accuracy over -40°C to +125°C ambient. | Lacks hysteresis selection and remote diode interface - uses internal sensor only; smaller footprint but limited to local sensing. | Choose only for local ambient monitoring where remote junction sensing is unnecessary and board space is constrained. |
Compared with MAX6512UT115-T and LM20BIM7-115/NOPB, the MAX6511UT115-T uniquely combines factory-trimmed +115°C trip, pin-selectable hysteresis, active-low CMOS drive, and true remote diode sensing - making it the only option among the three that supports both precise die-level monitoring and direct µP reset assertion without external components.
Availability
MAX6511UT115-T is available at Aetrix Electronics and suitable for CPU thermal monitoring, battery pack protection, multichip module supervision, and fan control applications requiring stable component supply across industrial and computing product lifecycles.
Supply support for MAX6511UT115-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 MAX6511UT115-T belongs to Maxim's remote temperature switch product line, engineered specifically for high-accuracy, low-power thermal supervision of semiconductor dies using external P-N junctions in space-constrained systems.
FAQ
What is the exact temperature trip threshold of the MAX6511UT115-T?
The MAX6511UT115-T has a factory-programmed temperature trip threshold of +115°C. This value is laser-trimmed during production and guaranteed across the operating ambient temperature range of -40°C to +85°C. Accuracy is ±3°C when ambient temperature is between -5°C and +55°C, and ±5°C over the full -40°C to +85°C ambient range. The MAX6511UT115-T does not support user-adjustable thresholds.
Does the MAX6511UT115-T require an external diode-connected transistor, and which devices are recommended?
Yes, the MAX6511UT115-T requires an external P-N junction - typically a diode-connected transistor - connected between DXP (anode) and DXN (cathode, tied to GND). Recommended transistors include MMBT3904, CMPT3904, SST3904, and KST3904-TF. These devices provide consistent VBE characteristics essential for ±3°C accuracy; large power transistors are not recommended due to process variation.
How is hysteresis configured on the MAX6511UT115-T, and what are the available values?
Hysteresis on the MAX6511UT115-T is configured via the HYST pin: applying VDD selects 10°C hysteresis, and grounding HYST selects 5°C hysteresis. This setting determines the temperature delta between trip assertion (+115°C) and deassertion (115°C – hysteresis). The HYST pin must not be left floating, as undefined logic levels may cause unpredictable output behavior.
Can the MAX6511UT115-T operate from a 3.3V supply, and what is its typical supply current?
Yes, the MAX6511UT115-T operates from +3.0V to +5.5V, fully supporting standard 3.3V system rails. Its typical supply current is 400µA, with a maximum of 600µA across temperature and voltage ranges. This low quiescent current enables continuous thermal monitoring in always-on subsystems without significant power budget impact.
What package type and RoHS status does the MAX6511UT115-T use?
The MAX6511UT115-T is supplied in a 6-pin SOT23-6 package (package code U6F-6), measuring 2.9mm × 1.6mm with 0.95mm height. Per Maxim's official ordering information, this variant is not RoHS/lead-free compliant (RoHS/Lead-Free: No). Lead-free alternatives are available in the MAX6513 family with TDFN packaging, but not for the MAX6511UT115-T.
MAX6511UT115-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 Low
- Output Function:
- /OverTemp
- Selectable Hysteresis:
- Yes
- Features:
- Selectable Hysteresis
- Voltage - Supply:
- 3 V ~ 5.5 V
- Current - Supply:
- 600µA
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- SOT-23-6
MAX6511UT115-T FAQ
1.How can I place an order for MAX6511UT115-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6511UT115-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 MAX6511UT115-T reliable?
The price and inventory of MAX6511UT115-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6511UT115-T is usually 5 days.
3.What payment methods are accepted for MAX6511UT115-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6511UT115-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6511UT115-T?
MAX6511UT115-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6511UT115-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 MAX6511UT115-T?
For technical support, including MAX6511UT115-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6511UT115-T requirements.
6.How does Aetrix verify that MAX6511UT115-T is sourced from the original manufacturer or authorized distributors?
All MAX6511UT115-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 MAX6511UT115-T meets industry standards.
7.What is the process for return or replacement of MAX6511UT115-T?
All MAX6511UT115-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6511UT115-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 MAX6511UT115-T part is unused and in its original packaging.
Return procedure for MAX6511UT115-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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