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Analog Devices Inc./Maxim Integrated MAX6509CAZK-T
- Part No.:
- MAX6509CAZK-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Thermostats - Solid State
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX6509CAZK-T.pdf
- Description:
- RESISTOR-PROGRAMMABLE SOT TEMPER
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
MAX6509CAZK-T from Maxim Integrated is a resistor-programmable SOT23-5 temperature switch with open-drain output, ±0.5°C typical threshold accuracy, -40°C to +125°C operating range, and pin-selectable 2°C/10°C hysteresis. It interfaces directly with microprocessor reset inputs for thermal monitoring in high-speed computing systems.
For engineers reviewing the MAX6509CAZK-T datasheet, MAX6509CAZK-T pinout, MAX6509CAZK-T application, or MAX6509CAZK-T equivalent, key selection criteria include external resistor-based trip-point programming, low 32µA supply current, SOT23-5 footprint compatibility, and set-cold functionality for underrange detection.
Technical Context
The MAX6509CAZK-T integrates dual temperature-dependent references (one positive, one negative TC) and a comparator to determine trip point; threshold is set by an external 1% resistor between SET and GND. Its open-drain output sinks current only and requires an external pull-up for logic-high assertion.
Hysteresis is selected via HYST pin (GND = 2°C, VCC = 10°C); leaving HYST unconnected increases supply current. The "C" suffix denotes set-cold configuration: output asserts when temperature falls below programmed threshold and deasserts after rising above threshold + hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | +2.7V to +5.5V - supports standard logic rails including 3.3V and 5V systems |
| Threshold Accuracy | ±0.5°C (typ), ±4.7°C (max) - enables precise thermal trip points across full -40°C to +125°C range |
| Supply Current | 32µA (typ) - minimizes self-heating and power budget impact in battery or low-power designs |
| Hysteresis Options | 2°C (HYST = GND) or 10°C (HYST = VCC) - prevents output oscillation near trip point |
| Output Type | Open-drain - allows wired-OR configuration and level translation with external pull-up |
| Package | SOT23-5 - compact 2.9mm × 1.6mm footprint suitable for space-constrained PCB layouts |
Pinout & Package
SOT23-5 package with 1.27mm pitch, 1.6mm width, and 2.9mm length; RoHS-compliant, lead-free construction.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal circuitry and SET resistor return path |
| 2 | VCC | Positive supply input; powers internal references, comparator, and bias networks |
| 3 | OUT | Open-drain output; sinks current when asserted; requires external pull-up for logic-high state |
| 4 | HYST | Hysteresis select input; CMOS-compatible; must be tied to GND or VCC (not floating) |
| 5 | SET | Temperature set-point input; connects to 1% external resistor to GND to program trip point |
Key Features
| Feature | Design Value |
|---|---|
| Set-cold operation | Asserts output on temperature decrease - enables underrange alarms and cold-start protection |
| Resistor-programmable threshold | Single 1% external resistor sets trip point from -40°C to +125°C without trimming or calibration |
| Low quiescent current | 32µA typical supply current limits self-heating to <0.2°C error in SOT23-5 package |
| Pin-selectable hysteresis | 2°C or 10°C hysteresis chosen by hardwiring HYST - eliminates need for external components |
Applications
| Microprocessor Thermal Monitoring | Fan Control Activation |
|---|---|
Use Scenario: Monitors CPU die temperature under load in desktop/server motherboards. IC Role / Device Role / Timing Role: Set-cold MAX6509CAZK-T triggers system reset if core temperature drops unexpectedly during cold boot or cooling failure. Use Value: Prevents erroneous operation due to sensor drift or thermal shock by asserting reset at validated cold threshold (e.g., -30°C). | Use Scenario: Activates cooling fan when ambient or enclosure temperature exceeds safe limit. IC Role / Device Role / Timing Role: Open-drain output drives fan enable line through pull-up; hysteresis avoids fan chatter near trip point. Use Value: Enables reliable fan start/stop control using only one external resistor and no microcontroller intervention. |
| Temperature Window Detection | Fail-Safe System Shutdown |
Use Scenario: Paired with a set-hot device (e.g., MAX6509HAUK+T) to detect out-of-range temperature in industrial controllers. IC Role / Device Role / Timing Role: MAX6509CAZK-T asserts when temperature falls below lower bound; outputs wire-ORed for single alarm signal. Use Value: Achieves full window detection with two ICs and one shared pull-up resistor - no additional logic required. | Use Scenario: Triggers emergency shutdown in automotive ECUs when coolant temperature drops below operational minimum. IC Role / Device Role / Timing Role: Directly interfaces with safety MCU's NMI or reset pin to halt execution on cold fault. Use Value: Guarantees deterministic response within 10ms of trip event, independent of firmware state. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar temperature switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6509HAUK+T | Set-hot configuration; asserts on temperature rise, deasserts on fall minus hysteresis | Used for overtemperature detection (e.g., CPU throttling), not cold-fault monitoring | Select MAX6509CAZK-T when cold-trip behavior is required; MAX6509HAUK+T for hot-trip only |
| LM75BIMM/NOPB | I²C digital output; ±2°C accuracy; fixed thresholds; no resistor programming | Requires MCU firmware support; unsuitable for standalone reset/fan control | Choose MAX6509CAZK-T for analog, pin-strapped simplicity; LM75BIMM/NOPB only if digital interface and configurability are needed |
Compared with MAX6509HAUK+T and LM75BIMM/NOPB, the MAX6509CAZK-T uniquely delivers set-cold behavior in a resistor-programmable, open-drain analog switch - enabling cold-fault detection without software or bus overhead.
Availability
MAX6509CAZK-T is available at Aetrix Electronics and suitable for microprocessor thermal monitoring, fan control activation, and fail-safe system shutdown requiring stable component supply and long-term obsolescence management.
Supply support for MAX6509CAZK-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.
The MAX6509/MAX6510 product line delivers resistor-programmable temperature switches optimized for standalone thermal protection in space- and cost-constrained systems without MCU dependency.
FAQ
What does the "C" suffix in MAX6509CAZK-T signify?
The "C" suffix indicates set-cold functionality: the MAX6509CAZK-T asserts its open-drain output when temperature falls below the programmed threshold and deasserts only after temperature rises above threshold + hysteresis. This behavior is essential for cold-start validation and underrange alarm applications - distinct from the "H" (set-hot) variant which responds to rising temperature.
How is the temperature threshold set for MAX6509CAZK-T?
The temperature threshold for MAX6509CAZK-T is set by connecting a single 1% tolerance resistor between the SET pin and GND. Resistor value is determined from published RSET vs. temperature curves or equations in the datasheet - e.g., for a -25°C trip point, RSET ≈ 122kΩ. No trimming or calibration is required.
Can MAX6509CAZK-T drive a fan directly?
No - MAX6509CAZK-T has an open-drain output and cannot source current. To drive a fan, it must interface with an external transistor or driver IC. Typical use connects OUT to the base/gate of an NPN/N-channel switch, with fan powered from VCC and grounded through the switch. A pull-up resistor on OUT ensures defined logic-high when inactive.
What is the role of the HYST pin on MAX6509CAZK-T?
The HYST pin selects hysteresis magnitude: tie to GND for 2°C hysteresis or to VCC for 10°C hysteresis. Leaving HYST floating increases supply current and risks unstable operation. Hysteresis prevents output oscillation when temperature lingers near the trip point - critical for reliable reset or alarm signaling in noisy thermal environments.
Is MAX6509CAZK-T compatible with 3.3V systems?
Yes - MAX6509CAZK-T operates from +2.7V to +5.5V, making it fully compatible with 3.3V logic systems. Its open-drain output can interface with 3.3V or 5V pull-up rails, and its 32µA supply current minimizes loading on low-voltage supplies. Threshold accuracy and hysteresis remain guaranteed across the full voltage range.
MAX6509CAZK-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Bulk
- Product Status:
- Active
- Trip Temperature Threshold:
- Hot
- Switching Temperature:
- Programmable
- Accuracy:
- ±4.7°C
- Current - Output (Max):
- 20mA
- Output Type:
- Open Drain
- Output:
- Active Low
- Output Function:
- /OverTemp
- Selectable Hysteresis:
- Yes
- Features:
- Selectable Trip Point
- Voltage - Supply:
- 2.7 V ~ 5.5 V
- Current - Supply:
- 32µA
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- TSOT-23-5
MAX6509CAZK-T FAQ
1.How can I place an order for MAX6509CAZK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6509CAZK-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 MAX6509CAZK-T reliable?
The price and inventory of MAX6509CAZK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6509CAZK-T is usually 5 days.
3.What payment methods are accepted for MAX6509CAZK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6509CAZK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6509CAZK-T?
MAX6509CAZK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6509CAZK-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 MAX6509CAZK-T?
For technical support, including MAX6509CAZK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6509CAZK-T requirements.
6.How does Aetrix verify that MAX6509CAZK-T is sourced from the original manufacturer or authorized distributors?
All MAX6509CAZK-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 MAX6509CAZK-T meets industry standards.
7.What is the process for return or replacement of MAX6509CAZK-T?
All MAX6509CAZK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6509CAZK-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 MAX6509CAZK-T part is unused and in its original packaging.
Return procedure for MAX6509CAZK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6509CAZK-T Tags
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Analog Devices Inc./Maxim Integrated
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