My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX1756BEUT
- Part No.:
- MAX1756BEUT
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- SOT-23-6
- Datasheet:
-
MAX1756BEUT.pdf
- Description:
- IC COMPARATOR 1 GEN PUR SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:537
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX1756BEUT from Maxim Integrated is a latched SMBus-compatible temperature comparator IC with ±3°C accuracy (25°C–100°C), 8°C programmable temperature window, and open-drain ALERT interrupt output - designed for thermal monitoring in CPU voltage regulators, memory modules, and industrial control systems.
For engineers reviewing the MAX1756BEUT datasheet, MAX1756BEUT pinout, MAX1756BEUT application, or MAX1756BEUT equivalent, key selection criteria include its latched ALERT behavior, DAC-programmable trip thresholds, -40°C to +125°C operating range, 2.375V–5.5V supply, and SOT23-6 package compatibility with space-constrained thermal sensing nodes.
Technical Context
The MAX1756BEUT implements a dual-threshold sampling architecture: one DAC level sets the rising trip point (TMAX), the other sets the falling threshold (THYST = TMAX − 8°C), enabling precise windowed thermal detection. Its PTAT-based analog front-end feeds a low-offset comparator shared between both thresholds via time-multiplexed sampling at ~1kHz.
SMBus communication uses Send Byte/Receive Byte protocols only - no command byte, no Alert Response support - with 7-bit slave addressing configurable via the ADD pin (VCC/GND/floating). The device enters software standby (<4µA) when TMAX is set to negative full scale, and features POR defaults including +100°C TMAX and masked THYST interrupts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| DAC Resolution | 2°C per LSB - enables fine-grained thermal trip adjustment in integer-degree steps |
| Temperature Accuracy | ±3°C (25°C–100°C); ±5°C (-40°C–125°C) - defines worst-case error margin for thermal safety margins |
| Temperature Window | 8°C (TMAX to THYST) - supports hysteresis-free windowing algorithms without external logic |
| Supply Voltage Range | +2.375V to +5.5V - compatible with 2.5V, 3.3V, and 5V system rails without level-shifting |
| Operating Current | 200µA max - enables always-on thermal monitoring in low-power embedded systems |
| SMBus Clock Frequency | DC to 100kHz - allows ultra-slow polling for power-sensitive applications |
| Output Type | Open-drain ALERT - supports wired-OR interrupt bus sharing with multiple sensors |
Pinout & Package
MAX1756BEUT is housed in a 6-pin SOT23 package (3.0mm × 1.7mm × 1.3mm), optimized for PCB footprint minimization and direct placement under microprocessors or near hot components.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - ADD | Slave address select input | Configures one of three SMBus addresses (VCC/GND/floating); latched at POR and standby exit |
| 2 - SMBDATA | SMBus bidirectional data line | Open-drain I/O requiring external pull-up; supports standard SMBus byte read/write protocols |
| 3 - SMBCLK | SMBus clock input | Asynchronous clock input; timing compliant with SMBus v1.1 (min 4µs high/low times) |
| 4 - ALERT | Latched interrupt output | Active-low open-drain signal asserted on TMAX exceedance or THYST undershoot; cleared only by status read or TMAX write |
| 5 - VCC | Power supply input | +2.375V to +5.5V rail; requires 0.1µF bypass capacitor to GND for noise immunity |
| 6 - GND | Ground reference | Analog/digital common return; critical for thermal conduction path and measurement accuracy |
Key Features
| Feature | Design Value |
|---|---|
| Latched ALERT output | Ensures interrupt persistence until firmware explicitly acknowledges - prevents missed thermal events during slow polling cycles |
| Programmable 8°C temperature window | Enables dynamic "centered window" thermal control without host-side hysteresis calculation or additional comparators |
| Software standby mode | Reduces current to <4µA when TMAX = −128°C - extends battery life in portable thermal monitors |
| Three-address pin-strapping | Allows up to six MAX1756BEUT devices on one SMBus without address conflict - simplifies multi-zone thermal mapping |
| UVLO and POR protection | Prevents erroneous trips during power ramp-up; clears registers below 1.5V and disables DAC below 2.2V |
Applications
| CPU Thermal Throttling | Memory Module Overtemperature Protection |
|---|---|
Use Scenario: Real-time die temperature monitoring adjacent to x86 or ARM processors to trigger clock throttling before thermal shutdown. IC Role / Device Role / Timing Role: Latched ALERT output directly drives processor THERMTRIP# or asserts interrupt to PMIC for immediate frequency scaling. Use Value: 8°C windowing allows firmware to dynamically adjust TMAX around real-time junction temperature - eliminating oscillatory throttling behavior. | Use Scenario: Monitoring DDR4/DDR5 module temperature to prevent data corruption or premature wear during sustained workloads. IC Role / Device Role / Timing Role: SMBus-connected sensor providing asynchronous ALERT assertion when module exceeds JEDEC-defined thermal limits (e.g., 95°C). Use Value: ±3°C accuracy over 25°C–100°C ensures compliance with JEDEC JESD22-A104 reliability testing thresholds. |
| Industrial PLC Cabinet Monitoring | Automotive Infotainment SoC Thermal Management |
Use Scenario: Detecting ambient cabinet temperature rise in programmable logic controllers to activate forced-air cooling before component derating. IC Role / Device Role / Timing Role: Standalone thermal comparator interfacing with PLC's microcontroller via SMBus; triggers relay control on ALERT assertion. Use Value: -40°C to +125°C extended temperature rating guarantees operation across industrial ambient extremes without calibration drift. | Use Scenario: Monitoring application processor die temperature in automotive head units to initiate display dimming or audio muting before thermal shutdown. IC Role / Device Role / Timing Role: Directly mounted on SoC substrate; ALERT signal routed to vehicle network controller for coordinated thermal response. Use Value: Open-drain ALERT supports 12V-tolerant wired-OR bus integration with other vehicle thermal sensors using single-pull-up configuration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar temperature comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1755BEUT | Self-clearing OVERT output (not latched); 4°C built-in hysteresis; identical DAC resolution and SMBus interface | Best suited for simple overtemperature alerts where automatic reset is preferred - e.g., fan start-up triggers | Select MAX1755BEUT when interrupt persistence is unnecessary and system design favors autonomous recovery |
| LM75BIMM/NOPB | ±2°C accuracy (0°C–70°C), 11-bit temperature register, no programmable windowing, ALERT polarity selectable via config register | Requires host-side hysteresis management; lacks dual-threshold windowing capability of MAX1756BEUT | Choose LM75BIMM/NOPB for cost-sensitive designs needing basic temperature readback + alert, not dynamic windowing |
Compared with MAX1755BEUT, MAX1756BEUT provides deterministic interrupt persistence essential for closed-loop thermal control, while LM75BIMM/NOPB offers higher base accuracy but requires firmware overhead to emulate windowing - making MAX1756BEUT optimal for responsive, self-contained thermal event handling.
Availability
MAX1756BEUT is available at Aetrix Electronics and suitable for CPU thermal throttling, memory module protection, and industrial PLC cabinet monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX1756BEUT 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 semiconductor company specializing in precision analog, mixed-signal, and power management ICs for industrial, computing, and automotive applications.
The MAX1755/MAX1756 product line delivers SMBus-compatible local temperature comparators with programmable thresholds - engineered for compact thermal monitoring in space-constrained, high-reliability systems where deterministic interrupt behavior is critical.
FAQ
What is the function of the ADD pin on the MAX1756BEUT?
The ADD pin on the MAX1756BEUT selects one of three SMBus slave addresses by connecting to VCC, GND, or left floating - enabling up to six MAX1756BEUT devices on a single bus. The address is latched at power-on reset and again when exiting software standby mode, ensuring stable communication without runtime reconfiguration.
How does the MAX1756BEUT implement temperature windowing?
The MAX1756BEUT implements temperature windowing using two DAC outputs: TMAX sets the upper trip threshold, and THYST (TMAX − 8°C) sets the lower threshold. When temperature crosses either boundary, the latched ALERT output asserts - allowing firmware to detect both over- and undertemperature conditions without external hysteresis circuitry or host-side calculations.
What is the default trip threshold for MAX1756BEUT at power-up?
At power-up, the MAX1756BEUT defaults to a TMAX value of +100°C, with THYST automatically set to +92°C (8°C below TMAX). The ALERT output is initially masked for undertemperature events, and the status register is cleared - ensuring predictable startup behavior in thermal control loops.
Can the MAX1756BEUT operate from a 2.5V supply?
Yes, the MAX1756BEUT operates from +2.375V to +5.5V, fully supporting 2.5V nominal supplies. Its undervoltage lockout activates below ~2.2V (typ), and all specifications - including ±3°C accuracy and 200µA max supply current - are guaranteed across this entire range, making it compatible with modern low-voltage digital systems.
How is the ALERT output cleared on the MAX1756BEUT?
The ALERT output on the MAX1756BEUT is latched and remains asserted until cleared by either reading the status register or writing a new value to the TMAX register. Both actions reset the OVER and UNDER bits in the status byte and deassert ALERT - ensuring firmware retains full control over interrupt acknowledgment timing.
MAX1756BEUT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SOT-23-6
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- Open-Drain
- Voltage - Supply, Single/Dual (±):
- 2.375V ~ 5.5V
- :
- -
- Voltage - Input Offset (Max):
- -
- Current - Input Bias (Max):
- 6mA (Min)
- Current - Output (Typ):
- 200µA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SOT-23-6
MAX1756BEUT FAQ
1.How can I place an order for MAX1756BEUT through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1756BEUT 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 MAX1756BEUT reliable?
The price and inventory of MAX1756BEUT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1756BEUT is usually 5 days.
3.What payment methods are accepted for MAX1756BEUT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1756BEUT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1756BEUT?
MAX1756BEUT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1756BEUT 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 MAX1756BEUT?
For technical support, including MAX1756BEUT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1756BEUT requirements.
6.How does Aetrix verify that MAX1756BEUT is sourced from the original manufacturer or authorized distributors?
All MAX1756BEUT 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 MAX1756BEUT meets industry standards.
7.What is the process for return or replacement of MAX1756BEUT?
All MAX1756BEUT units undergo pre-shipment inspection (PSI). If there is an issue with MAX1756BEUT, 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 MAX1756BEUT part is unused and in its original packaging.
Return procedure for MAX1756BEUT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX1756BEUT Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
-
LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP USA Inc.
Tech Hub
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…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
