My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6670AUB65+
- Part No.:
- MAX6670AUB65+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Thermostats - Solid State
- Package:
- -
- Datasheet:
-
MAX6670AUB65+.pdf
- Description:
- IC TEMP SENSOR REMOTE 10-UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:3,982
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6670AUB65+ from Maxim Integrated is a remote-junction thermal switch with integrated +12V/250mA fan driver, factory-programmed trip threshold of +65°C, ±2.2°C max temperature accuracy over -40°C to +125°C, and dual open-drain overtemperature alarms (WARN at +80°C, OT at +95°C). It directly controls cooling fans in automotive-grade power systems using an external diode-connected transistor for remote die temperature sensing.
For engineers reviewing the MAX6670AUB65+ datasheet, MAX6670AUB65+ pinout, MAX6670AUB65+ application, or MAX6670AUB65+ equivalent, key selection criteria include its 10-pin µMAX package, pin-selectable hysteresis (4°C/8°C/12°C), FORCEON override capability, and automotive temperature range compliance.
Technical Context
The MAX6670AUB65+ integrates a BiCMOS remote diode temperature sensor, comparator with programmable hysteresis via HYST pin, and a high-current open-drain FANOUT MOSFET driver. It operates from +3V to +3.6V and samples temperature at 3.3Hz to 4Hz.
It features two dedicated alarm outputs: WARN (active-low at +15°C above trip) and OT (active-low at +30°C above trip), both open-drain with 6mA sink capability and <0.5V VOL. The FORCEON input allows external fan activation independent of temperature sensing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Fan Trip Threshold | +65°C factory-programmed; defines exact temperature at which FANOUT activates cooling fan |
| Temperature Accuracy | ±2.2°C max over +40°C to +75°C remote junction range; ensures reliable thermal margin in automotive systems |
| FANOUT Drive Capability | +12V/250mA open-drain sink; directly drives standard PC/industrial cooling fans without external transistors |
| Hysteresis Options | Pin-selectable: 4°C (HYST = GND), 8°C (HYST = float), 12°C (HYST = VDD); prevents fan chatter during thermal transients |
| Supply Current | 110µA typical; enables low-power thermal monitoring in always-on automotive subsystems |
| Operating Temperature | -40°C to +125°C; qualified for under-hood and industrial control environments |
| WARN/OT Threshold Offset | +15°C (WARN) and +30°C (OT) above fan trip; provides staged thermal warning and shutdown signaling |
Pinout & Package
MAX6670AUB65+ is housed in a 10-pin µMAX package (3.0mm × 3.0mm × 0.8mm), optimized for space-constrained automotive and industrial PCB layouts. PGND serves as dedicated power ground for the FANOUT MOSFET, isolating switching noise from signal ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PGND | Power Ground | Dedicated return path for FANOUT current; separates high-current fan drive from signal ground to reduce noise coupling |
| 2 FORCEON | Fan-Control Input | Active-low logic input that overrides internal temperature control to force FANOUT on regardless of sensed temperature |
| 3 DXP | Current Source Positive | Connects to anode of remote diode; supplies bias current for junction temperature measurement |
| 4 DXN | Current Sink Negative | Connects to cathode of remote diode; completes remote-sensing current path with internal bias |
| 5 GND | Signal Ground | Reference for all logic inputs/outputs and internal circuitry; separate from PGND for noise immunity |
| 6 VDD | Positive Supply | +3V to +3.6V digital/analog supply; requires local 1µF bypass capacitor per layout guidelines |
| 7 FANOUT | Fan-Drive Output | Open-drain power MOSFET output capable of sinking ≥250mA at ≤1V drop; drives fan between VDD and +12V rail |
| 8 WARN | Warning Output | Active-low open-drain alarm indicating remote junction exceeds +65°C by +15°C (+80°C); sinks 6mA |
| 9 HYST | Hysteresis Control | Three-level logic input selecting 4°C (GND), 8°C (float), or 12°C (VDD) hysteresis to match system cooling dynamics |
| 10 OT | Overtemperature Output | Active-low open-drain shutdown signal triggered at +95°C; used for critical thermal cutoff in safety-critical systems |
Key Features
| Feature | Design Value |
|---|---|
| Integrated +12V/250mA Fan Driver | Eliminates need for external MOSFET and gate driver; reduces BOM count and PCB area in fan-control circuits |
| Factory-Programmed +65°C Trip Point | Guarantees precise thermal activation without calibration; supports consistent thermal management across production batches |
| Pin-Selectable Hysteresis (4°C/8°C/12°C) | Enables tuning of fan on/off cycling behavior to match specific heatsink response time and acoustic requirements |
| Dual Alarm Outputs (WARN/OT) | Provides layered thermal response: early warning (+15°C) and hard shutdown (+30°C) for fail-safe system protection |
| FORCEON Override Input | Allows host microcontroller or system logic to manually activate fan for diagnostics, startup, or emergency cooling |
Applications
| Automotive Engine Control Units | Industrial Power Supplies |
|---|---|
|
Use Scenario: Monitoring IGBT junction temperature in 12V/24V vehicle DC-DC converters. IC Role / Device Role / Timing Role: Remote-junction thermal switch triggering fan cooling when power stage exceeds +65°C. Use Value: Prevents thermal runaway by activating forced-air cooling before critical semiconductor limits are breached. |
Use Scenario: Thermal management of high-density AC-DC power modules in factory automation equipment. IC Role / Device Role / Timing Role: Direct fan controller responding to remote diode temperature with staged WARN/OT alerts. Use Value: Enables predictive maintenance via WARN output while ensuring safe shutdown via OT at +95°C. |
| Network Equipment Racks | Laboratory Instrumentation |
|
Use Scenario: Cooling high-speed ASICs in telecom line cards where airflow is constrained. IC Role / Device Role / Timing Role: Compact thermal switch driving 12V fans with minimal external components. Use Value: Reduces board space vs. discrete solutions while maintaining ±2.2°C accuracy across -40°C to +125°C ambient. |
Use Scenario: Protecting precision analog front-ends in benchtop test equipment from self-heating drift. IC Role / Device Role / Timing Role: Low-quiescent-current (+3.3V/110µA) thermal monitor enabling always-on operation. Use Value: Extends instrument uptime by preventing thermal-induced calibration drift through proactive fan activation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar remote thermal switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6670AUB70+ | +70°C factory trip threshold; identical pinout, hysteresis options, and alarm offsets | Suitable where higher thermal margin is required before fan activation | Select when system thermal design targets fan start at +70°C instead of +65°C |
| MAX6668AUA65+ | 8-pin µMAX package; fixed 8°C hysteresis; no WARN/OT outputs; same +65°C trip | Lower-cost solution where only basic fan control is needed without staged alarms | Choose for cost-sensitive designs omitting overtemperature warning functionality |
Compared with MAX6670AUB70+, MAX6670AUB65+ triggers fan control 5°C earlier-critical for systems with rapid thermal rise. Versus MAX6668AUA65+, it adds WARN/OT alarms and hysteresis flexibility at the cost of two extra pins and slightly higher complexity.
Availability
MAX6670AUB65+ is available at Aetrix Electronics and suitable for automotive engine control units, industrial power supplies, and network equipment racks requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6670AUB65+ 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) is a U.S.-based semiconductor company specializing in high-performance analog and mixed-signal ICs for industrial, automotive, and communications markets.
The MAX6668/MAX6670 product line delivers integrated thermal management solutions targeting fan control in harsh-environment systems, combining remote diode sensing, power switching, and alarm signaling in single-chip form.
FAQ
What is the factory-programmed temperature threshold for MAX6670AUB65+?
The MAX6670AUB65+ has a factory-programmed fan activation threshold of +65°C. This value is laser-trimmed during manufacturing and cannot be adjusted. The device asserts FANOUT when the remote P-N junction temperature exceeds this point, with hysteresis applied to prevent oscillation. The WARN output activates at +80°C (+65°C +15°C), and OT at +95°C (+65°C +30°C).
Does MAX6670AUB65+ require external calibration or trimming?
No, MAX6670AUB65+ requires no external calibration or trimming. Its temperature measurement accuracy is guaranteed at ±2.2°C maximum over the +40°C to +75°C remote junction range, and the +65°C trip point is factory-programmed with ±1°C typical tolerance. The internal BiCMOS sensor and comparator eliminate need for software compensation or resistor networks.
What is the maximum fan voltage and current supported by MAX6670AUB65+?
MAX6670AUB65+ supports fan operation up to +12V nominal (15V absolute maximum) and can sink up to 250mA through its FANOUT pin. The output is an open-drain power MOSFET with ≤1V voltage drop at 250mA, enabling direct drive of common 12V cooling fans without external transistors or drivers.
How does the HYST pin affect hysteresis behavior in MAX6670AUB65+?
In MAX6670AUB65+, the HYST pin selects hysteresis value: connect to GND for 4°C, leave floating for 8°C, or tie to VDD for 12°C. This adjusts the temperature difference between fan turn-on (+65°C) and turn-off (+65°C − hysteresis), preventing rapid cycling near the trip point. The MAX6668 variant lacks this pin and uses fixed 8°C hysteresis.
Can MAX6670AUB65+ drive fans from a supply different than its VDD?
Yes, MAX6670AUB65+ supports split-rail operation: VDD is +3V to +3.6V for logic and sensing, while FANOUT switches the fan between its own PGND and an independent +12V (or lower) fan supply rail. This isolation allows the device to control higher-voltage fans without exposing its low-voltage circuitry to those rails.
MAX6670AUB65+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Trip Temperature Threshold:
- -
- Switching Temperature:
- -
- Accuracy:
- -
- Current - Output (Max):
- -
- Output Type:
- -
- Output:
- -
- Output Function:
- -
- Selectable Hysteresis:
- -
- Features:
- -
- Voltage - Supply:
- -
- Current - Supply:
- -
- Operating Temperature:
- -
- Mounting Type:
- -
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- -
MAX6670AUB65+ FAQ
1.How can I place an order for MAX6670AUB65+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6670AUB65+ 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 MAX6670AUB65+ reliable?
The price and inventory of MAX6670AUB65+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6670AUB65+ is usually 5 days.
3.What payment methods are accepted for MAX6670AUB65+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6670AUB65+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6670AUB65+?
MAX6670AUB65+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6670AUB65+ 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 MAX6670AUB65+?
For technical support, including MAX6670AUB65+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6670AUB65+ requirements.
6.How does Aetrix verify that MAX6670AUB65+ is sourced from the original manufacturer or authorized distributors?
All MAX6670AUB65+ 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 MAX6670AUB65+ meets industry standards.
7.What is the process for return or replacement of MAX6670AUB65+?
All MAX6670AUB65+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6670AUB65+, 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 MAX6670AUB65+ part is unused and in its original packaging.
Return procedure for MAX6670AUB65+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6670AUB65+ 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…
