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Analog Devices Inc./Maxim Integrated MAX6504UKN035+
- Part No.:
- MAX6504UKN035+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Thermostats - Solid State
- Package:
- -
- Datasheet:
-
MAX6504UKN035+.pdf
- Description:
- THERMOSTAT
- Quantity:
- Payment:
- Shipping:
Inventory:3,625
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Product details
Overview
MAX6504UKN035+ from Maxim Integrated is a cold-temperature threshold, push-pull output temperature switch with factory-trimmed trip point of -35°C, ±0.5°C typical accuracy, 2.7V to 5.5V supply range, and 30µA quiescent current. It asserts an active-high signal when die temperature falls below -35°C and is used in thermal shutdown circuits for low-temperature monitoring in industrial sensors and battery-powered equipment.
For engineers reviewing the MAX6504UKN035+ datasheet, MAX6504UKN035+ pinout, MAX6504UKN035+ application, or MAX6504UKN035+ equivalent, key selection criteria include cold-threshold behavior, push-pull drive capability (800µA source / 3.2mA sink), pin-selectable hysteresis (2°C or 10°C), SOT23-5 package compatibility, and absence of external components.
Technical Context
The MAX6504UKN035+ integrates dual on-chip temperature-dependent voltage references (one positive, one negative TC) and a comparator to define its -35°C trip point. Its internal power-on reset ensures stable output state for 50µs at startup.
Hysteresis is selected via the HYST pin: grounded for 2°C, tied to VCC for 10°C - preventing output oscillation near threshold. The TUNDER output is push-pull active-high, eliminating need for external pull-up resistors unlike open-drain variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Threshold | -35°C cold-trip point; output goes high when die temperature falls below this value |
| Accuracy (typ) | ±0.5°C over full operating range; enables precise low-temperature fault detection |
| Supply Voltage | +2.7V to +5.5V; compatible with 3.3V and 5V logic systems without level shifting |
| Supply Current | 30µA typical; supports micropower operation in battery-backed or energy-constrained systems |
| Output Type | Push-pull active-high; drives fan control or logic directly without external pull-up |
| Hysteresis | PIN-selectable 2°C (HYST = GND) or 10°C (HYST = VCC); prevents chatter during slow thermal transitions |
| Operating Range | -55°C to +125°C ambient; validated for industrial and automotive under-hood environments |
Pinout & Package
SOT23-5 package with exposed pad thermal path; pins 1 and 2 are both GND (pin 2 provides lowest thermal resistance to die); pin 3 is HYST; pin 4 is VCC; pin 5 is TUNDER (push-pull active-high output).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 GND | Ground reference and thermal path | Both pins must be connected to system ground; pin 2 offers lowest θJA for accurate thermal coupling |
| 3 HYST | Hysteresis select input | CMOS-compatible; tie to GND for 2°C hysteresis, VCC for 10°C; must not float |
| 4 VCC | Positive supply input | Accepts +2.7V to +5.5V; powers internal references and comparator |
| 5 TUNDER | Active-high temperature alarm output | Push-pull structure sinks up to 3.2mA or sources up to 800µA; no external pull-up required |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed cold threshold | -35°C trip point laser-trimmed at wafer test; eliminates calibration overhead in production |
| No external components | Self-contained sensing and switching; reduces BOM count and PCB area vs. discrete thermistor + comparator solutions |
| Low thermal self-heating | Typical 0.042°C shift at 1mA sink load; maintains measurement fidelity in thermally isolated placements |
| Fail-safe power-on reset | Guaranteed known output state for 50µs after VCC ramp; prevents spurious resets during power sequencing |
| RoHS-compliant SOT23-5 | Lead(Pb)-free package with JEDEC-standard footprint; supports automated assembly and reflow |
Applications
| Industrial Battery Monitoring | Automotive Cabin Sensors |
|---|---|
Use Scenario: Monitoring lithium-thionyl chloride battery packs in remote telemetry units where low-temperature operation down to -40°C is required. IC Role / Device Role / Timing Role: Cold-temperature alarm generator that triggers battery disconnect before electrolyte freezing occurs. Use Value: Prevents irreversible cell damage by asserting shutdown at precisely -35°C with ±0.5°C repeatability across temperature cycles. | Use Scenario: Detecting cabin temperature drop below safe occupancy thresholds in parked EVs with passive heating systems. IC Role / Device Role / Timing Role: Low-power thermal watchdog that activates seat heater control logic upon reaching -35°C. Use Value: Enables direct drive of heater enable lines with 800µA source capability, eliminating interface transistors and reducing standby current. |
| Medical Diagnostic Equipment | Outdoor IoT Edge Nodes |
Use Scenario: Ensuring reagent storage modules remain above minimum operational temperature during winter field deployment. IC Role / Device Role / Timing Role: Cold-temperature interlock that disables instrument startup until ambient exceeds -35°C. Use Value: Uses pin-selectable 10°C hysteresis (HYST = VCC) to avoid repeated enable/disable cycling near threshold in fluctuating outdoor conditions. | Use Scenario: Protecting LoRaWAN gateways mounted on utility poles from condensation-induced failure during sub-zero nights. IC Role / Device Role / Timing Role: Thermal guard that asserts system reset when enclosure temperature drops below -35°C. Use Value: Leverages 30µA supply current and SOT23-5 size to fit within space-constrained enclosures while maintaining reliable cold-start behavior. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar cold-threshold temperature switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6503UKN035+ | Same -35°C cold threshold and SOT23-5 package, but open-drain active-low output requiring external pull-up | Requires 100kΩ pull-up resistor; incompatible with direct logic-level interfacing | Select when interfacing with µP reset inputs expecting active-low assertion |
| LM20BIMAX/NOPB | Analog temperature sensor (output voltage proportional to temp), not a switch; requires external comparator and reference | Enables programmable thresholds but adds design complexity and component count | Select when variable trip points or analog feedback are needed instead of fixed cold-alarm behavior |
Compared with MAX6503UKN035+, the MAX6504UKN035+ eliminates pull-up dependency and simplifies fan/logic drive; compared with LM20BIMAX/NOPB, it delivers immediate digital alarm response without signal conditioning or firmware interpretation.
Availability
MAX6504UKN035+ is available at Aetrix Electronics and suitable for industrial battery monitoring, automotive cabin sensors, medical diagnostic equipment, and outdoor IoT edge nodes requiring stable component supply and long-term lifecycle support.
Supply support for MAX6504UKN035+ 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 industrial, automotive, communications, and computing markets.
The MAX6501–MAX6504 family was developed to deliver low-cost, micropower, fully integrated temperature switches with factory-trimmed thresholds for thermal protection in space- and power-constrained systems.
FAQ
What is the exact temperature trip point of the MAX6504UKN035+?
The MAX6504UKN035+ has a factory-programmed cold-temperature threshold of -35°C, meaning its TUNDER output goes high when the die temperature falls below this value. This trip point is laser-trimmed during manufacturing and specified with ±0.5°C typical accuracy over the full -55°C to +125°C operating range, as confirmed in the official Maxim datasheet revision 6.
Does the MAX6504UKN035+ require external components to operate?
No, the MAX6504UKN035+ requires no external components. It integrates dual temperature-dependent voltage references, a comparator, and push-pull output stage internally. Unlike open-drain variants such as MAX6503UKN035+, the MAX6504UKN035+ does not need a pull-up resistor because its TUNDER pin provides active-high drive capability up to 800µA source current.
How is hysteresis configured on the MAX6504UKN035+?
Hysteresis on the MAX6504UKN035+ is configured via the HYST pin: connect HYST to GND for 2°C hysteresis or to VCC for 10°C hysteresis. This pin is CMOS-compatible and must not be left floating, as intermediate voltages increase supply current. The actual hysteresis value also depends on the programmed trip temperature, per the Typical Operating Characteristics graph in the MAX6504UKN035+ datasheet.
What is the supply voltage range supported by the MAX6504UKN035+?
The MAX6504UKN035+ operates from a single supply voltage ranging from +2.7V to +5.5V. This range supports direct connection to common logic rails including 3.3V and 5V systems without regulation or level translation. Absolute maximum rating is +7V, but functional operation is guaranteed only within the 2.7V–5.5V window specified in the Electrical Characteristics table of the MAX6504UKN035+ datasheet.
Can the MAX6504UKN035+ be used in a temperature window alarm configuration?
Yes, the MAX6504UKN035+ can be paired with a hot-threshold device like MAX6502UKP075+ to form a temperature window alarm. In this configuration, the MAX6504UKN035+ monitors the lower limit (-35°C) and the MAX6502 asserts above +75°C; their outputs can be ORed externally to generate an out-of-range signal. The push-pull outputs of both devices simplify wired-OR implementation without additional transistors or pull-ups.
MAX6504UKN035+ 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:
- -
MAX6504UKN035+ FAQ
1.How can I place an order for MAX6504UKN035+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6504UKN035+ 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 MAX6504UKN035+ reliable?
The price and inventory of MAX6504UKN035+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6504UKN035+ is usually 5 days.
3.What payment methods are accepted for MAX6504UKN035+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6504UKN035+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6504UKN035+?
MAX6504UKN035+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6504UKN035+ 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 MAX6504UKN035+?
For technical support, including MAX6504UKN035+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6504UKN035+ requirements.
6.How does Aetrix verify that MAX6504UKN035+ is sourced from the original manufacturer or authorized distributors?
All MAX6504UKN035+ 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 MAX6504UKN035+ meets industry standards.
7.What is the process for return or replacement of MAX6504UKN035+?
All MAX6504UKN035+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6504UKN035+, 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 MAX6504UKN035+ part is unused and in its original packaging.
Return procedure for MAX6504UKN035+:
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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