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Microchip Technology MCP9844T-BE/MNYAA
- Part No.:
- MCP9844T-BE/MNYAA
- Manufacturer:
- Microchip Technology
- Category:
- Thermal Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
MCP9844T-BE/MNYAA.pdf
- Description:
- IC DIMM TEMP SENSOR 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,741
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Product details
Overview
MCP9844T-BE/MNYAA from Microchip Technology is a high-accuracy digital temperature sensor IC with ±0.2°C typical accuracy from +75°C to +95°C, 1 MHz I²C Fast Mode Plus interface, user-selectable resolution down to 0.0625°C, and programmable temperature alert output. It operates from 1.7V to 3.6V and draws only 100 µA typical supply current, making it suitable for battery-powered SSD thermal monitoring and embedded industrial sensing.
For engineers reviewing the MCP9844T-BE/MNYAA datasheet, MCP9844T-BE/MNYAA pinout, MCP9844T-BE/MNYAA application, or MCP9844T-BE/MNYAA equivalent, this page delivers verified technical context, validated pin functions, real-world use cases in thermal event management, and confirmed alternative options for precision ambient temperature measurement in space-constrained designs.
Technical Context
The MCP9844T-BE/MNYAA integrates a bandgap temperature sensor, delta-sigma ADC, and I²C-compatible serial interface in a single die. Its register-mapped architecture supports independent configuration of upper/lower temperature window limits (TUPPER/TLOWER), critical trip point (TCRIT), hysteresis (0°C/1.5°C/3°C/6°C), and event output polarity (active-low or active-high).
It implements a 16-bit configuration register enabling shutdown mode (0.2 µA typical), lock bits for trip registers, interrupt clear functionality, and selectable event trigger modes - either full-window alarm or critical-only interrupt - all accessible via standard I²C read/write sequences without sequential register access.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Range | −40°C to +125°C operating range; supports industrial freezer, server, and SSD thermal guardbanding. |
| Accuracy (typ./max) | ±0.2°C / ±1°C from +75°C to +95°C; enables tight thermal throttling control in compute applications. |
| Resolution Options | User-selectable: 0.5°C, 0.25°C, 0.125°C, or 0.0625°C LSB; balances precision vs. conversion time (260 ms max). |
| I²C Interface Speed | Up to 1 MHz (Fast Mode Plus); compatible with high-speed microcontrollers without bus stretching. |
| Supply Voltage | 1.7V to 3.6V; interoperable with 1.8V and 3.3V logic domains in mixed-voltage systems. |
| Quiescent Current | 100 µA typical; allows continuous monitoring in always-on portable devices with minimal power impact. |
| Shutdown Current | 0.2 µA typical; extends battery life in intermittently sampled thermal logging applications. |
Pinout & Package
Package: 8-pin 2×3 mm TDFN with exposed thermal pad (EP), optimized for low thermal resistance (θJA = 52.5°C/W) and PCB heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1, A2 | Slave address inputs | Set LSBs of I²C address (0011xxx); enable up to 8 devices on same bus without external logic. |
| GND | Ground reference | Common return path; internally connected to EP for enhanced thermal conduction to PCB ground plane. |
| SDA | Bidirectional data line | Open-drain I²C data pin requiring external pull-up; supports standard/fast/fast-plus timing with 50 ns setup. |
| SCL | Clock input | Master-generated clock; device does not stretch SCL, ensuring deterministic bus timing at 1 MHz. |
| Event | Open-drain alert output | Asserts when TA exceeds programmed limits; polarity and mode (comparator/interrupt) configurable via register. |
| VDD | Power supply | Accepts 1.7–3.6 V; includes internal POR (1.4–1.6 V threshold) and line regulation <0.2°C error across full range. |
| EP | Exposed thermal pad | Internally tied to GND; must be soldered to PCB thermal pad to achieve specified θJA and reliability. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable temperature window | Independent TUPPER/TLOWER registers allow dual-threshold thermal event detection (e.g., fan start/stop hysteresis). |
| Critical temperature lock | TCRIT lock bit prevents accidental overwrite of safety-critical trip point during firmware updates or runtime faults. |
| User-configurable hysteresis | Four selectable hysteresis values (0°C/1.5°C/3°C/6°C) eliminate output chatter near boundary transitions. |
| Flexible event output mode | Configurable as comparator (thermostat) or interrupt (microprocessor wake-up), with polarity selection for direct MCU GPIO compatibility. |
| Resolution-speed trade-off control | Four resolution settings let designers optimize between measurement precision (0.0625°C) and update rate (up to ~3.8 Hz). |
Applications
| SSD Thermal Management | Industrial Refrigeration Control |
|---|---|
Use Scenario: Real-time die temperature monitoring in NVMe SSDs to prevent thermal throttling and extend NAND flash lifetime. IC Role / Device Role / Timing Role: Primary ambient temperature sensor feeding thermal management firmware; alerts via Event pin trigger host-side throttling decisions. Use Value: ±0.2°C accuracy in +75°C to +95°C range ensures precise activation of thermal back-off before performance degradation occurs. |
Use Scenario: Monitoring evaporator coil temperature in commercial refrigeration units to maintain food-safe storage conditions. IC Role / Device Role / Timing Role: Standalone temperature monitor with programmable window limits; drives compressor/fan control logic via open-drain Event output. Use Value: Configurable hysteresis (up to 6°C) prevents rapid cycling of compressors during slow ambient drift near setpoints. |
| Server CPU Zone Sensing | Portable Medical Device Monitoring |
Use Scenario: Localized temperature sensing near multi-core CPUs in 1U rack servers to support dynamic frequency scaling and fan speed control. IC Role / Device Role / Timing Role: Secondary thermal sensor complementing on-die diode readings; provides board-level ambient reference for system-level thermal algorithms. Use Value: 1.7–3.6 V operation and 100 µA current enable integration into 3.3 V or 1.8 V power domains without additional regulators. |
Use Scenario: Battery-powered handheld diagnostic equipment requiring long-term thermal stability during clinical measurements. IC Role / Device Role / Timing Role: Low-power temperature logger with shutdown mode; wakes periodically to sample and store ambient data. Use Value: 0.2 µA shutdown current extends battery life to >1 year in intermittent-read applications while retaining full register state. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital temperature sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTS751-DR | ±0.5°C max accuracy over −40°C to +125°C; fixed 0.125°C resolution; no window hysteresis programming. | Lacks programmable TUPPER/TLOWER hysteresis and critical-only event mode; suited for simpler threshold detection. | Select STTS751-DR where cost sensitivity outweighs need for fine-grained hysteresis control and multi-mode alert outputs. |
| LM75BIMM/NOPB | ±2°C max accuracy; 0.5°C resolution; no shutdown mode; 0.5 µA standby current; no exposed thermal pad. | Lower accuracy and no thermal pad limit use in high-precision or thermally demanding environments like SSDs. | Choose LM75BIMM/NOPB only for non-critical ambient sensing where PCB area and BOM cost are primary constraints. |
Compared with STTS751-DR and LM75BIMM/NOPB, the MCP9844T-BE/MNYAA delivers superior accuracy in the critical +75°C to +95°C range, finer resolution control, lower power in shutdown, and hardware-supported hysteresis - making it the preferred choice for thermally constrained, high-reliability embedded systems.
Availability
MCP9844T-BE/MNYAA is available at Aetrix Electronics and suitable for SSD thermal monitoring, industrial refrigeration control, server CPU zone sensing, and portable medical device monitoring requiring stable component supply and long-term manufacturability.
Supply support for MCP9844T-BE/MNYAA 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
Microchip Technology Inc. is a leading provider of microcontroller, analog, and interface solutions, with a focus on robust, low-power semiconductor components for industrial, automotive, and computing markets.
The MCP9844T-BE/MNYAA belongs to Microchip's precision digital temperature sensor product line, designed specifically for applications demanding high accuracy, flexible alerting, and ultra-low power consumption in compact form factors.
FAQ
What is the maximum I²C clock frequency supported by the MCP9844T-BE/MNYAA?
The MCP9844T-BE/MNYAA supports I²C Fast Mode Plus operation up to 1 MHz, with guaranteed timing compliance including tLOW ≥ 500 ns and tHIGH ≥ 260 ns at VDD = 2.2V to 3.6V. It does not stretch the SCL line, ensuring predictable bus arbitration in multi-slave systems. This capability makes the MCP9844T-BE/MNYAA suitable for high-throughput thermal monitoring in modern microcontroller-based platforms.
How does the MCP9844T-BE/MNYAA achieve ±0.2°C accuracy in the +75°C to +95°C range?
The MCP9844T-BE/MNYAA achieves ±0.2°C typical accuracy in the +75°C to +95°C range through factory calibration of its bandgap temperature sensor and delta-sigma ADC, combined with on-die compensation for process and voltage variations. This specification is validated across production lots at 1.8V supply and is documented in the DS20005192B datasheet, Figure 2-1 and Table 1-1. The MCP9844T-BE/MNYAA maintains this accuracy without requiring system-level calibration.
Can the MCP9844T-BE/MNYAA operate from a 1.8V supply?
Yes, the MCP9844T-BE/MNYAA is fully specified to operate from 1.7V to 3.6V, including 1.8V nominal supplies. Its power-on reset threshold (1.4V to 1.6V) and line regulation (<0.2°C error across VDD range) ensure reliable startup and stable temperature readings at 1.8V. This makes the MCP9844T-BE/MNYAA compatible with modern low-voltage SoCs and FPGAs without level-shifting circuitry.
What is the function of the Exposed Thermal Pad (EP) on the MCP9844T-BE/MNYAA package?
The Exposed Thermal Pad (EP) on the MCP9844T-BE/MNYAA is internally connected to GND and serves as a low-thermal-resistance path from the die to the PCB. When soldered to a copper thermal pad on the board, it reduces θJA to 52.5°C/W, improving long-term reliability and measurement stability under sustained thermal load. Leaving EP unconnected degrades thermal performance and may affect accuracy in high-ambient environments.
Does the MCP9844T-BE/MNYAA support multiple device addressing on the same I²C bus?
Yes, the MCP9844T-BE/MNYAA supports up to eight unique addresses via three hardware address pins (A0, A1, A2), each configurable as logic high (VDD) or low (GND). The base I²C address is 0x18 (0011000b), with A2–A0 forming the LSBs. This allows concurrent operation of multiple MCP9844T-BE/MNYAA sensors on a single I²C bus without software arbitration, ideal for multi-zone thermal monitoring systems.
MCP9844T-BE/MNYAA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Temp Monitoring System (Sensor)
- Sensor Type:
- Internal
- Sensing Temperature:
- -40°C ~ 125°C
- Accuracy:
- ±3°C(Max)
- Topology:
- ADC (Sigma Delta), Register Bank
- Output Type:
- 2-Wire Serial, I2C
- Output Alarm:
- Yes
- Output Fan:
- Yes
- Voltage - Supply:
- 1.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (2x3)
MCP9844T-BE/MNYAA FAQ
1.How can I place an order for MCP9844T-BE/MNYAA through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP9844T-BE/MNYAA 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 MCP9844T-BE/MNYAA reliable?
The price and inventory of MCP9844T-BE/MNYAA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP9844T-BE/MNYAA is usually 5 days.
3.What payment methods are accepted for MCP9844T-BE/MNYAA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP9844T-BE/MNYAA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP9844T-BE/MNYAA?
MCP9844T-BE/MNYAA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP9844T-BE/MNYAA 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 MCP9844T-BE/MNYAA?
For technical support, including MCP9844T-BE/MNYAA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP9844T-BE/MNYAA requirements.
6.How does Aetrix verify that MCP9844T-BE/MNYAA is sourced from the original manufacturer or authorized distributors?
All MCP9844T-BE/MNYAA 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 MCP9844T-BE/MNYAA meets industry standards.
7.What is the process for return or replacement of MCP9844T-BE/MNYAA?
All MCP9844T-BE/MNYAA units undergo pre-shipment inspection (PSI). If there is an issue with MCP9844T-BE/MNYAA, 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 MCP9844T-BE/MNYAA part is unused and in its original packaging.
Return procedure for MCP9844T-BE/MNYAA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCP9844T-BE/MNYAA Tags
-
EMC2101-ACZL-TR
Microchip Technology
-
MCP9844T-BE/MNY
Microchip Technology
-
EMC2101-R-ACZL-TR
Microchip Technology
-
MCP98244T-BE/MNY
Microchip Technology
-
TC670ECHTR
Microchip Technology
-
SE98ATP,547
NXP Semiconductors
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AMC6821SDBQR
Texas Instruments
-
MAX6604AATA+T
Analog Devices Inc./Maxim Integrated
-
ADT7475ARQZ-REEL
onsemi
-
MAX6643LBBAEE+
Analog Devices Inc./Maxim Integrated
-
MAX6684ESA+T
Analog Devices Inc./Maxim Integrated
-
MAX6639AEE+
Analog Devices Inc./Maxim Integrated
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