My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6513UT085
- Part No.:
- MAX6513UT085
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Thermostats - Solid State
- Package:
- SOT-23-6
- Datasheet:
-
MAX6513UT085.pdf
- Description:
- REMOTE TEMPERATURE SWITCH
- Quantity:
- Payment:
- Shipping:
Inventory:325
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX6513UT085 from Maxim Integrated is an active-high remote temperature switch that uses an external diode-connected transistor as a sensing element to monitor remote junction temperature, with a factory-programmed trip threshold of +85°C, ±5°C accuracy over -40°C to +85°C ambient, 5°C/10°C pin-selectable hysteresis, and CMOS output capable of directly driving a cooling fan in CPU thermal management systems.
For engineers reviewing the MAX6513UT085 datasheet, MAX6513UT085 pinout, MAX6513UT085 application, or MAX6513UT085 equivalent, this device serves as a precision, low-power, SOT23-packaged thermal protection solution for embedded computing, battery packs, and multichip modules where accurate remote diode-based temperature monitoring and immediate logic-level fan control are required.
Technical Context
The MAX6513UT085 integrates a precision bandgap reference, chopper-stabilized amplifier, current source, and comparator to measure forward voltage across an external P-N junction and compute temperature. It continuously steers bias currents through the remote diode and performs oversampled voltage integration for noise immunity.
Hysteresis is selected via the HYST pin (VDD = 10°C, GND = 5°C), preventing output chatter near the +85°C trip point; the active-high TOVER output asserts when temperature exceeds the threshold and deasserts only after falling below (85°C – hysteresis), ensuring stable fan activation/deactivation timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Threshold | +85°C factory-programmed trip point - defines exact thermal shutdown or fan-on activation temperature |
| Accuracy | ±5°C over -40°C to +85°C ambient - guarantees worst-case trip error in industrial operating environments |
| Hysteresis | PIN-selectable 5°C or 10°C - prevents oscillation during slow temperature transitions near threshold |
| Supply Range | +3.0V to +5.5V - compatible with standard 3.3V and 5V logic rails without level-shifting |
| Supply Current | 400µA typical - enables always-on thermal monitoring in power-constrained systems |
| Response Time | <100ms - ensures rapid reaction to thermal events such as CPU load spikes |
| Output Type | Active-high CMOS - directly interfaces with gate of power FET for fan control without pull-up resistors |
Pinout & Package
The MAX6513UT085 is packaged in a 6-pin SOT23-6 (package code U6F-6), with exposed pad not present; footprint is 9 mm², lead pitch 0.95 mm, body dimensions 2.9 mm × 1.6 mm × 1.1 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Accepts +3.0V to +5.5V; requires 0.1µF bypass capacitor to GND for noise suppression |
| GND | Ground reference | Common return path for supply, sensing, and output; must be low-impedance |
| HYST | Hysteresis selection input | CMOS-compatible; VDD = 10°C hysteresis, GND = 5°C hysteresis; must not float |
| TOVER | Active-high CMOS output | Drives high (VDD – 0.2V min) when T ≥ 85°C; sinks ≤0.2V at 1mA load; fan-control ready |
| DXN | Negative sense terminal | Connects to cathode of external diode/transistor; must be tied to GND |
| DXP | Positive sense terminal | Connects to anode of external diode/transistor; pairs with DXN for differential remote sensing |
Key Features
| Feature | Design Value |
|---|---|
| Remote junction temperature measurement | Uses external diode-connected transistor (e.g., MMBT3904) - enables precise die-temperature monitoring of CPUs and SoCs |
| Factory-trimmed trip threshold | +85°C with no user calibration needed - reduces BOM count and firmware complexity in thermal management |
| Series resistance immunity | <1°C error with ≤100Ω parasitic resistance in DXP/DXN lines - tolerates PCB trace resistance without compensation |
| Noise-immune sensing architecture | Oversampling + chopper stabilization - rejects EMI from switching regulators and digital noise without external filtering beyond 2200pF |
| Low quiescent power | 400µA supply current - supports continuous monitoring in battery-backed or energy-harvesting applications |
Applications
| CPU Temperature Monitoring | Fan Control |
|---|---|
Use Scenario: Real-time thermal monitoring of microprocessor die temperature using on-die sensing diode. IC Role / Device Role / Timing Role: Remote temperature switch asserting active-high signal to enable fan driver FET when core temperature reaches +85°C. Use Value: Prevents thermal throttling by initiating cooling before critical junction temperature is exceeded; hysteresis avoids fan cycling during transient loads. | Use Scenario: Direct drive of 5V-cooling fan in embedded industrial controller with variable thermal load. IC Role / Device Role / Timing Role: Active-high CMOS output replaces discrete logic + transistor stage, simplifying fan enable circuitry. Use Value: Eliminates need for external pull-up resistor and level shifter; reduces component count and layout area while improving response time. |
| Battery Pack Protection | Multichip Module Thermal Management |
Use Scenario: Overtemperature cutoff for Li-ion battery pack during fast charging in portable medical equipment. IC Role / Device Role / Timing Role: Monitors remote NTC/diode sensor on cell stack; asserts TOVER to disable charge FET when pack surface reaches +85°C. Use Value: Provides fail-safe thermal cutoff independent of host MCU, meeting IEC 62368-1 safety requirements without software dependency. | Use Scenario: Thermal coordination across stacked ASICs and memory in high-density compute module. IC Role / Device Role / Timing Role: Dedicated per-module MAX6513UT085 monitors local junction temp; outputs feed centralized thermal manager. Use Value: Enables granular, localized thermal response instead of system-wide throttling - preserves performance in non-hot zones. |
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 | Active-low CMOS output; identical threshold, accuracy, and package | Requires inverted logic interface (e.g., µP reset input); cannot directly drive high-side fan FET | Select when interfacing with microcontroller reset/interrupt pins expecting active-low assertion |
| LM75BIMM-3/NOPB | I²C digital output; ±2°C accuracy; no remote diode support; 8-pin VSSOP | Requires MCU firmware polling or interrupt handling; measures local ambient, not remote junction | Select when digital bus integration and higher accuracy are prioritized over simplicity and direct actuation |
Compared with MAX6511UT085, the MAX6513UT085 provides native active-high fan control without inversion logic; compared with LM75BIMM-3/NOPB, it delivers faster, autonomous analog switching with remote diode capability but lacks digital configurability.
Availability
MAX6513UT085 is available at Aetrix Electronics and suitable for CPU thermal monitoring, battery pack protection, and multichip module temperature alarms requiring stable component supply across industrial, computing, and portable electronics programs.
Supply support for MAX6513UT085 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, with expertise in sensor interfaces, power management, and data conversion.
The MAX6513UT085 belongs to Maxim's remote temperature switch product line, engineered specifically for low-cost, high-reliability thermal protection in space-constrained systems using external P-N junction sensing - targeting CPU, battery, and MCM thermal management.
FAQ
What is the factory-set temperature threshold for the MAX6513UT085?
The MAX6513UT085 has a factory-programmed temperature trip threshold of +85°C. This value is laser-trimmed during production and is not user-adjustable. The device asserts its active-high TOVER output when the measured remote junction temperature equals or exceeds +85°C, and deasserts only after temperature falls below (85°C – hysteresis), where hysteresis is set to either 5°C or 10°C via the HYST pin. This fixed threshold eliminates calibration overhead in thermal protection circuits.
Does the MAX6513UT085 require an external sensing element, and what type is recommended?
Yes, the MAX6513UT085 requires an external P-N junction sensing element - typically a diode-connected transistor such as the MMBT3904, SST3904, or KST3904-TF. These devices must have base shorted to collector to form a two-terminal diode. The MAX6513UT085 steers bias currents through this external junction and measures its forward voltage to compute temperature. Transistors with tight forward current gain specs ensure consistent VBE characteristics and optimal accuracy.
Can the MAX6513UT085 operate from a 3.3V supply, and what is its typical current draw?
Yes, the MAX6513UT085 operates from +3.0V to +5.5V, making it fully compatible with standard 3.3V logic rails. Its typical supply current is 400µA at +25°C ambient, with a maximum of 600µA across the full -40°C to +85°C operating range. This low quiescent current enables continuous thermal monitoring in power-sensitive applications such as battery-powered instrumentation or always-on embedded controllers without significant impact on system runtime.
How is hysteresis configured on the MAX6513UT085, and why is it important?
Hysteresis on the MAX6513UT085 is configured using the HYST pin: connect to VDD for 10°C hysteresis or to GND for 5°C hysteresis. This setting determines the temperature delta between output assertion (+85°C) and deassertion (85°C – hysteresis). Hysteresis prevents output chatter when temperature fluctuates near the trip point - critical for reliable fan control or shutdown sequencing. The HYST pin must never be left floating, as undefined logic levels may cause unpredictable hysteresis behavior.
What package options are available for the MAX6513UT085, and are they RoHS-compliant?
The MAX6513UT085 is offered in the 6-pin SOT23-6 package (package code U6F-6), with footprint dimensions 2.9 mm × 1.6 mm × 1.1 mm. Per Maxim's ordering information, the MAX6513UT085 variant is not RoHS/lead-free - it is leaded. A lead-free TDFN option exists under the MAX6513TTxxx series (e.g., MAX6513TT085), but that is a distinct part number with different package (6-pin TDFN, 3×3 mm) and marking code (+ACY). The MAX6513UT085 itself remains a leaded SOT23 device.
MAX6513UT085 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:
- Programmable
- Accuracy:
- ±3°C
- Current - Output (Max):
- 250µA
- Output Type:
- Open Collector
- 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
MAX6513UT085 FAQ
1.How can I place an order for MAX6513UT085 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6513UT085 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 MAX6513UT085 reliable?
The price and inventory of MAX6513UT085 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6513UT085 is usually 5 days.
3.What payment methods are accepted for MAX6513UT085?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6513UT085 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6513UT085?
MAX6513UT085 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6513UT085 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 MAX6513UT085?
For technical support, including MAX6513UT085 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6513UT085 requirements.
6.How does Aetrix verify that MAX6513UT085 is sourced from the original manufacturer or authorized distributors?
All MAX6513UT085 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 MAX6513UT085 meets industry standards.
7.What is the process for return or replacement of MAX6513UT085?
All MAX6513UT085 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6513UT085, 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 MAX6513UT085 part is unused and in its original packaging.
Return procedure for MAX6513UT085:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6513UT085 Tags
-
N34TS04MT3ETG
onsemi
-
MCP9501PT-095E/OT
Microchip Technology
-
TMP390AQDRLRQ1
Texas Instruments
-
TC6501P125VCTTR
Microchip Technology
-
LM26CIM5-RPA/NOPB
Texas Instruments
-
MCP9509HT-E/OT
Microchip Technology
-
MCP9509CT-E/OT
Microchip Technology
-
MCP9510HT-E/CH
Microchip Technology
-
TC622VOA
Microchip Technology
-
TC620CEOA
Microchip Technology
-
TC622VAT
Microchip Technology
-
MAX6509HAUK+T
Analog Devices Inc./Maxim Integrated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
