My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6503UKN015
- Part No.:
- MAX6503UKN015
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Thermostats - Solid State
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6503UKN015.pdf
- Description:
- MICROPOWER TEMPERATURE SWITCH
- Quantity:
- Payment:
- Shipping:
Inventory:1,061
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6503UKN015 from Maxim Integrated is a cold-temperature threshold, open-drain, micropower temperature switch with factory-trimmed trip point of -15°C, ±0.5°C typical accuracy, 30µA supply current, and pin-selectable 2°C/10°C hysteresis. It interfaces directly with µP reset inputs in thermal monitoring circuits for industrial control and embedded systems.
For engineers reviewing the MAX6503UKN015 datasheet, MAX6503UKN015 pinout, MAX6503UKN015 application, or MAX6503UKN015 equivalent, this page provides verified functional identity, SOT23-5 package mapping, cold-threshold behavior (asserts low below -15°C), hysteresis configuration logic, and validated alternative options for thermal alarm designs requiring sub-zero trip points.
Technical Context
The MAX6503UKN015 uses dual on-chip temperature-dependent voltage references-one with positive and one with negative temperature coefficient-to define its -15°C trip point. Its comparator output drives an active-low, open-drain TOVER terminal that sinks up to 1.2mA at VCC > 2.7V.
Hysteresis is selected via the HYST pin: grounded for 2°C hysteresis, tied to VCC for 10°C hysteresis. The device operates across -55°C to +125°C ambient, with internal power-on reset guaranteeing stable output state for 50µs at startup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.7V to +5.5V - supports direct connection to 3.3V or 5V logic rails without regulation |
| Temperature Threshold | -15°C - factory-programmed cold-trip point; asserts output low when die temperature falls below -15°C |
| Threshold Accuracy | ±0.5°C (typ) - enables precise low-temperature alarm triggering in battery-powered sensors |
| Supply Current | 30µA - allows continuous operation for years on coin-cell batteries in remote monitoring nodes |
| Output Type | Active-low open-drain - requires external pull-up; compatible with µP reset inputs and wired-OR alarm buses |
| Hysteresis Options | 2°C (HYST = GND) or 10°C (HYST = VCC) - prevents chatter near trip point in thermally noisy environments |
| Package | SOT23-5 - surface-mount footprint with Pin 2 providing lowest thermal resistance to die for accurate sensing |
Pinout & Package
SOT23-5 package with exposed thermal pad not electrically connected; Pin 2 provides lowest thermal resistance path to die for optimal thermal coupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 GND | Ground reference | Both pins must be connected together near chip; Pin 2 is thermally optimized for die-to-PCB heat transfer |
| 3 HYST | Hysteresis select input | CMOS-compatible; drive to GND for 2°C hysteresis, to VCC for 10°C hysteresis; floating not allowed |
| 4 VCC | Positive supply | 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 resistor (e.g., 100kΩ) |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Fully integrated references and comparator eliminate calibration resistors, capacitors, or op-amps |
| Factory-programmed cold threshold | -15°C trip point laser-trimmed during production; no field adjustment needed |
| Low thermal self-heating | Typical 140°C/W θJA; 30µA supply current limits self-heating to <0.05°C error under normal conditions |
| Microprocessor reset compatibility | Open-drain output meets µP reset timing and voltage thresholds when pulled up to same or higher rail |
| Thermal step response | 12.5°C/div in perfluorinated fluid; enables fast detection of rapid cooling events in refrigeration controls |
Applications
| Refrigeration Unit Monitoring | Industrial PLC Cold-Start Protection |
|---|---|
Use Scenario: Monitoring evaporator coil temperature in commercial refrigeration units to prevent freezing damage. IC Role / Device Role / Timing Role: Cold-temperature switch asserting low when coil drops below -15°C, triggering compressor shutdown. Use Value: Prevents ice formation by reacting within seconds of crossing threshold, leveraging SOT23's fast thermal response. | Use Scenario: Ensuring programmable logic controllers only boot when ambient cabinet temperature exceeds safe cold-start limit. IC Role / Device Role / Timing Role: Reset supervisor that holds µP in reset until cabinet warms above -15°C during winter deployment. Use Value: Eliminates firmware corruption risk from cold-induced SRAM bit flips using factory-trimmed -15°C threshold. |
| Medical Cryogenic Storage Alert | Battery-Powered Environmental Logger |
Use Scenario: Audible/visual alarm activation when ultra-low temperature freezers exceed safe warm limit (-15°C). IC Role / Device Role / Timing Role: Cold-trip sensor driving buzzer or LED via open-drain output and pull-up resistor. Use Value: ±0.5°C typical accuracy ensures alarm triggers before sample integrity is compromised. | Use Scenario: Long-term temperature logging in remote field deployments powered by lithium thionyl chloride cells. IC Role / Device Role / Timing Role: Low-power thermal watchdog enabling wake-up circuitry only when temperature falls below -15°C. Use Value: 30µA quiescent current extends battery life to >10 years in intermittent-monitoring applications. |
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 |
|---|---|---|---|
| MAX6503UKN005 | Factory-trimmed trip point of -5°C instead of -15°C; identical package, pinout, and electrical specs | Suitable where alarm threshold must trigger at milder cold conditions (e.g., HVAC freeze protection) | Select when system requires earlier warning before reaching deep-cold operational limits |
| LM75BIMM-3/NOPB | Digital I²C temperature sensor with programmable thresholds; 8-pin VSSOP; requires MCU interface and firmware | Enables dual hot/cold thresholds and temperature readback, but adds software complexity and power overhead | Choose when design needs configurable thresholds or temperature telemetry, not just binary alarm |
Compared with MAX6503UKN015, MAX6503UKN005 offers a higher cold threshold for less aggressive shutdown, while LM75BIMM-3/NOPB trades simplicity and ultra-low power for digital configurability and measurement capability-making it appropriate only when system-level intelligence justifies added BOM cost and firmware effort.
Availability
MAX6503UKN015 is available at Aetrix Electronics and suitable for refrigeration monitoring, industrial PLC cold-start protection, and medical cryogenic storage alert systems requiring stable component supply and guaranteed long-term availability.
Supply support for MAX6503UKN015 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, and communications applications.
The MAX6501–MAX6504 family delivers fully integrated, low-cost temperature switches targeting thermal safety and reliability in space-constrained, battery-operated, and high-volume embedded systems.
FAQ
What is the exact factory-programmed temperature threshold for MAX6503UKN015?
The MAX6503UKN015 has a factory-programmed cold-temperature threshold of -15°C. This means the open-drain output (TUNDER) asserts low when the die temperature falls below -15°C. The threshold is laser-trimmed during production and specified with ±0.5°C typical accuracy over the full operating range.
Does MAX6503UKN015 require external components to operate?
No, the MAX6503UKN015 requires no external components for basic operation. It integrates two temperature-dependent voltage references and a comparator internally. 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.
How is hysteresis configured on MAX6503UKN015?
Hysteresis on the MAX6503UKN015 is configured via the HYST pin: connect HYST to GND for 2°C hysteresis or to VCC for 10°C hysteresis. The pin must not be left floating, as intermediate voltages increase supply current. The actual hysteresis value also depends on the programmed trip point, as confirmed in the Typical Operating Characteristics graph.
What is the supply current consumption of MAX6503UKN015 across temperature?
The MAX6503UKN015 consumes 30µA typical supply current over the full -55°C to +125°C operating range. Data sheet Figure TOC01 shows supply current remains stable between 25µA and 35µA across temperature, confirming micropower performance essential for battery-backed applications.
Can MAX6503UKN015 be used in a temperature window alarm with a hot-threshold device?
Yes, the MAX6503UKN015 is designed to pair with hot-threshold devices like MAX6501UKP075 to form a temperature window alarm. Its open-drain TUNDER output can be wire-ORed with a MAX6501's TOVER output using a single pull-up resistor, generating a single "out-of-range" signal when temperature falls below -15°C or rises above the hot threshold.
MAX6503UKN015 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
MAX6503UKN015 FAQ
1.How can I place an order for MAX6503UKN015 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6503UKN015 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 MAX6503UKN015 reliable?
The price and inventory of MAX6503UKN015 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6503UKN015 is usually 5 days.
3.What payment methods are accepted for MAX6503UKN015?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6503UKN015 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6503UKN015?
MAX6503UKN015 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6503UKN015 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 MAX6503UKN015?
For technical support, including MAX6503UKN015 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6503UKN015 requirements.
6.How does Aetrix verify that MAX6503UKN015 is sourced from the original manufacturer or authorized distributors?
All MAX6503UKN015 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 MAX6503UKN015 meets industry standards.
7.What is the process for return or replacement of MAX6503UKN015?
All MAX6503UKN015 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6503UKN015, 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 MAX6503UKN015 part is unused and in its original packaging.
Return procedure for MAX6503UKN015:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6503UKN015 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…
