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Analog Devices Inc./Maxim Integrated MAX6503UKP015
- Part No.:
- MAX6503UKP015
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Thermostats - Solid State
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6503UKP015.pdf
- Description:
- MICROPOWER TEMPERATURE SWITCH
- Quantity:
- Payment:
- Shipping:
Inventory:2,339
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Product details
Overview
MAX6503UKP015 from Maxim Integrated is a cold-temperature threshold, open-drain, micropower temperature switch in SOT23-5 package with factory-programmed trip point of +15°C, ±0.5°C typical accuracy, 2.7V–5.5V supply range, and pin-selectable 2°C/10°C hysteresis-designed for microprocessor reset signaling when ambient or component temperature falls below threshold.
For engineers reviewing the MAX6503UKP015 datasheet, MAX6503UKP015 pinout, MAX6503UKP015 application, or MAX6503UKP015 equivalent, this device serves as a low-cost, no-component-required thermal alarm for cold-temperature monitoring in embedded systems, industrial controllers, and power management circuits where precise sub-threshold detection and minimal quiescent current (30µA) are critical.
Technical Context
The MAX6503UKP015 integrates two on-die temperature-dependent voltage references (one positive, one negative TC) and a comparator to define its +15°C trip point. Its active-low, open-drain TUNDER output requires an external pull-up resistor and interfaces directly with µP reset inputs.
Hysteresis is selected via the HYST pin: grounded for 2°C hysteresis or tied to VCC for 10°C hysteresis-preventing output oscillation near threshold. The device operates across -55°C to +125°C ambient, with die temperature tracking package temperature due to negligible self-heating (30µA ICC, θJA = 140°C/W).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Threshold | +15°C factory-trimmed cold-trip point; asserts output when die temperature falls below this value |
| Accuracy | ±0.5°C typical over full operating range; enables high-confidence cold-alarm triggering without calibration |
| Supply Voltage Range | +2.7V to +5.5V; compatible with 3.3V and 5V logic rails and battery-backed systems |
| Supply Current | 30µA typical at +25°C; supports always-on thermal monitoring in power-constrained applications |
| Output Type | Active-low, open-drain TUNDER; sinks up to 1.2mA, supports level-shifting via external pull-up to voltages > VCC |
| Hysteresis Options | PIN-selectable: 2°C (HYST = GND) or 10°C (HYST = VCC); prevents chatter during slow thermal transitions |
| Package | SOT23-5 with dual GND pins (pins 1 & 2); pin 2 provides lowest thermal resistance to die for accurate sensing |
Pinout & Package
SOT23-5 package with exposed thermal pad not electrically connected; dual ground pins (1 & 2) must be shorted externally near the device; pin 2 offers lowest thermal resistance to die for optimal temperature tracking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 - GND | Ground reference and thermal path | Both pins connect to system ground; pin 2 provides lowest θJA for accurate die temperature coupling |
| 3 - HYST | Hysteresis selection input | CMOS-compatible; tie to GND for 2°C hysteresis, to VCC for 10°C; floating state increases ICC |
| 4 - VCC | Positive supply input | Accepts +2.7V to +5.5V; powers internal references, comparator, and output stage |
| 5 - TUNDER | Active-low, open-drain output | Sinks current when die temperature < +15°C; requires external pull-up; supports voltage translation |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed cold threshold | +15°C trip point laser-trimmed at wafer test; eliminates need for external calibration or trimming components |
| No external components required | Self-contained sensing and decision circuitry; only external part needed is pull-up resistor on TUNDER |
| Low 30µA supply current | Enables continuous monitoring in battery-powered or energy-harvesting systems without significant drain |
| Pin-selectable hysteresis | 2°C or 10°C hysteresis chosen at board level via HYST connection-no BOM change or firmware update needed |
| SOT23-5 footprint compatibility | Standard 5-pin SOT23 layout enables drop-in replacement within same package family and PCB land pattern |
Applications
| Microprocessor Cold-Start Protection | Industrial Sensor Cold-Drift Alarm |
|---|---|
Use Scenario: Monitors CPU or FPGA junction temperature during cold startup in outdoor telecom equipment operating down to -40°C ambient. IC Role / Device Role / Timing Role: MAX6503UKP015 acts as cold-temperature enable switch-holding µP in reset until die reaches +15°C, preventing unstable boot at sub-optimal temperatures. Use Value: Eliminates need for software-based thermal validation during boot; ensures deterministic hardware-level readiness before initialization. |
Use Scenario: Installed adjacent to precision analog sensor in industrial PLC module to detect abnormal cooling that causes gain drift or offset error. IC Role / Device Role / Timing Role: MAX6503UKP015 functions as cold-fault detector-asserting TUNDER low when sensor housing cools below +15°C due to HVAC failure or environmental breach. Use Value: Provides immediate hardware interrupt to trigger diagnostic logging or safe-mode entry before measurement errors propagate. |
| Medical Device Battery-Chamber Monitoring | Automotive ECU Low-Temperature Enable |
Use Scenario: Mounted inside battery compartment of portable ultrasound unit to prevent operation below safe Li-ion discharge temperature. IC Role / Device Role / Timing Role: MAX6503UKP015 serves as battery-temperature interlock-disabling power path control logic when cell temperature drops below +15°C. Use Value: Prevents lithium plating and capacity loss by enforcing hardware-enforced lower thermal limit on system activation. |
Use Scenario: Embedded in engine control unit to delay CAN bus initialization and fuel injection sequencing until coolant temperature exceeds +15°C after cold soak. IC Role / Device Role / Timing Role: MAX6503UKP015 delivers cold-enable signal to MCU reset controller-ensuring firmware loads only after minimum thermal stability is reached. Use Value: Avoids cold-start misfires and emissions noncompliance by synchronizing software execution with verified thermal readiness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar cold-temperature switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6503UKN015 | Same +15°C cold threshold, identical electrical specs, but marked with N suffix indicating negative-trip coding convention (functionally identical) | No functional difference; used interchangeably where marking code compliance is not required | Select MAX6503UKN015 if legacy BOM or internal traceability mandates N-suffix coding; otherwise MAX6503UKP015 preferred per standard ordering guide |
| LM75BIMM/NOPB | Digital I²C temperature sensor with programmable thresholds; 0.5°C resolution but requires MCU interface and firmware polling | Not a direct replacement: provides temperature reading, not autonomous switching; adds software overhead and latency | Choose LM75BIMM/NOPB only when system already uses I²C infrastructure and needs configurable thresholds or temperature telemetry-not for simple reset assertion |
Compared with MAX6503UKN015, the MAX6503UKP015 offers identical performance with standard P-suffix marking; compared with LM75BIMM/NOPB, it delivers zero-latency, zero-software cold-alarm response in a smaller footprint and lower power budget-making it superior for deterministic hardware safety interlocks.
Availability
MAX6503UKP015 is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and automotive electronics requiring stable component supply with guaranteed long-term availability and RoHS-compliant packaging.
Supply support for MAX6503UKP015 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 power, sensing, and interface applications, with emphasis on high-reliability, low-power solutions for industrial and automotive markets.
The MAX6501–MAX6504 product line was developed specifically for cost-sensitive, space-constrained thermal monitoring-delivering factory-calibrated temperature switching in ultra-small SOT23 packages without external components.
FAQ
What is the exact temperature trip point of the MAX6503UKP015?
The MAX6503UKP015 has a factory-programmed cold-temperature trip threshold of +15°C, meaning its TUNDER output goes low when the die temperature falls below +15°C. This value is laser-trimmed during production and specified with ±0.5°C typical accuracy across the full -55°C to +125°C operating range, as confirmed in the official Maxim datasheet revision 6.
Does the MAX6503UKP015 require external components to operate?
No, the MAX6503UKP015 requires no external components for basic operation. It integrates all necessary temperature references, comparator, and output driver. Only an external pull-up resistor on the TUNDER pin is needed for proper open-drain logic interfacing-typically 100kΩ to VCC or another logic rail-as explicitly stated in the Typical Operating Circuit and Applications Information sections of the MAX6503UKP015 datasheet.
How is hysteresis configured on the MAX6503UKP015?
Hysteresis on the MAX6503UKP015 is configured solely via the HYST pin: connecting HYST to GND selects 2°C hysteresis, while connecting HYST to VCC selects 10°C hysteresis. The datasheet warns against leaving HYST floating, as it increases supply current. The actual hysteresis value also varies slightly with trip temperature, as shown in Figure MAX6501 TOC8, but +15°C devices exhibit values closely matching the selected mode.
Can the MAX6503UKP015 output drive a microcontroller reset pin directly?
Yes, the MAX6503UKP015's open-drain TUNDER output is explicitly designed to interface with microprocessor reset inputs. When the die temperature falls below +15°C, TUNDER pulls low (≤0.3V at 1.2mA sink), satisfying standard CMOS reset voltage thresholds. A pull-up resistor (e.g., 100kΩ) to the µP's VDD rail completes the interface-exactly as shown in Figure 2 ("Microprocessor Alarm/Reset") of the MAX6503UKP015 datasheet.
What is the thermal resistance and self-heating impact of the MAX6503UKP015?
The MAX6503UKP015 in SOT23-5 package has a typical junction-to-ambient thermal resistance (θJA) of 140°C/W. With 30µA supply current at 5V, power dissipation is ~150µW-resulting in negligible self-heating (<0.02°C). Even under worst-case 1mA sink, additional dissipation is ≤0.3mW, causing only ~0.042°C die shift. Thus, die temperature accurately reflects package temperature, enabling reliable ambient or component monitoring.
MAX6503UKP015 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Trip Temperature Threshold:
- Cold
- Switching Temperature:
- -15°C
- Accuracy:
- ±4°C
- Current - Output (Max):
- 20mA
- Output Type:
- Open Drain
- Output:
- Active Low
- Output Function:
- /UnderTemp
- Selectable Hysteresis:
- Yes
- Features:
- Selectable Hysteresis
- Voltage - Supply:
- 2.7 V ~ 5.5 V
- Current - Supply:
- 30µA
- Operating Temperature:
- -55°C ~ 125°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- SOT-23-5
MAX6503UKP015 FAQ
1.How can I place an order for MAX6503UKP015 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6503UKP015 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 MAX6503UKP015 reliable?
The price and inventory of MAX6503UKP015 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6503UKP015 is usually 5 days.
3.What payment methods are accepted for MAX6503UKP015?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6503UKP015 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6503UKP015?
MAX6503UKP015 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6503UKP015 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 MAX6503UKP015?
For technical support, including MAX6503UKP015 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6503UKP015 requirements.
6.How does Aetrix verify that MAX6503UKP015 is sourced from the original manufacturer or authorized distributors?
All MAX6503UKP015 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 MAX6503UKP015 meets industry standards.
7.What is the process for return or replacement of MAX6503UKP015?
All MAX6503UKP015 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6503UKP015, 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 MAX6503UKP015 part is unused and in its original packaging.
Return procedure for MAX6503UKP015:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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