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Microchip Technology MCP98243T-BE/MCAA
- Part No.:
- MCP98243T-BE/MCAA
- Manufacturer:
- Microchip Technology
- Category:
- Thermal Management
- Package:
- 8-VFDFN Exposed Pad
- Datasheet:
-
MCP98243T-BE/MCAA.pdf
- Description:
- IC TEMP SENSOR 2WIRE 3V 8-DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,744
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Product details
Overview
MCP98243T-BE/MCAA from Microchip Technology is a JEDEC JC42.4-TSE2002B3-compliant digital temperature sensor with integrated 2 Kbit serial EEPROM for Serial Presence Detect (SPD) in DRAM modules. It delivers ±0.2°C typical accuracy from +75°C to +95°C, operates from 2.7V to 5.5V, consumes 200 µA typical active current, and interfaces via I²C/SMBus up to 400 kHz - deployed in server DIMMs for real-time thermal monitoring and SPD data storage.
For engineers reviewing the MCP98243T-BE/MCAA datasheet, MCP98243T-BE/MCAA pinout, MCP98243T-BE/MCAA application, or MCP98243T-BE/MCAA equivalent, key selection considerations include its dual-function architecture (precision sensing + write-protected EEPROM), JEDEC SPD compliance, 8-pin DFN/TSSOP package options, and event output configurability for thermal alerting in memory subsystems.
Technical Context
The MCP98243T-BE/MCAA integrates a band-gap temperature sensor and Delta-Sigma ADC with user-programmable registers for temperature event boundaries (TUPPER/TLOWER/TCRIT), shutdown control, and resolution selection (0.0625°C to 0.5°C). Its I²C interface supports up to eight devices on one bus and features programmable event polarity (active-high/low) and interrupt/thermostat modes.
Unlike the MCP9843, the MCP98243T-BE/MCAA embeds a 256-byte EEPROM organized as 256 × 8-bit, with permanent (PWP) and software-reversible (SWP) write protection on addresses 0x00–0x7F, while 0x80–0xFF remain unprotected for general-purpose use - all accessible over the same I²C bus using distinct device addresses (0x18 for sensor, 0x50 for EEPROM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temp Accuracy (Grade B) | ±0.2°C typ. / ±1°C max. at +75°C to +95°C - meets JEDEC TSE2002B3 for DIMM thermal validation |
| EEPROM Size & Protection | 2 Kbit (256 × 8-bit); lower 128 bytes permanently or reversibly write-protected - enables secure SPD vendor data storage |
| I²C Interface Speed | Up to 400 kHz - supports high-speed host polling without bus contention in multi-sensor DIMM layouts |
| Supply Voltage Range | 2.7V to 5.5V (sensor), 1.8V to 5.5V (EEPROM) - allows shared VDD with DDR memory rails and flexible system power design |
| Event Output Type | Open-drain, configurable polarity - directly drives microcontroller interrupts or discrete comparator inputs without level-shifting |
| Operating Current | 200 µA typical (sensor active, EEPROM inactive) - enables low-power thermal monitoring during system standby |
| Shutdown Current | 1–3 µA - reduces power in idle states while preserving EEPROM data integrity |
Pinout & Package
Package: 8-pin DFN (2 mm × 3 mm, exposed thermal pad), also available in TSSOP-8. The EP pad must be connected to GND for optimal thermal performance and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Slave address LSB + EEPROM write-protect voltage input | Configures I²C address bit 0; applying 7–12 V enables SWP/PWP - dual-role pin requires careful voltage sequencing |
| A1, A2 | Slave address bits 1 and 2 | Set device address (0x18–0x1F for sensor, 0x50–0x57 for EEPROM) - enables up to 8 sensors per bus |
| GND | System ground reference | Reference for analog sensing, digital logic, and EP thermal path - must be low-impedance connection |
| SDA | Bidirectional I²C data line | Open-drain, requires external pull-up; supports standard/fast-mode I²C with tSU:DI ≥ 100 ns at 400 kHz |
| SCL | I²C clock input | Master-generated clock; device does not stretch SCL - timing-critical for reliable register access |
| Event | Open-drain temperature alert output | Asserts when TA exceeds programmed limits; polarity and latch behavior configurable via CONFIG register |
| VDD | Power supply input | Supplies both sensor and EEPROM; POR threshold is 2.2 V (sensor) and 1.6 V (EEPROM) |
| EP | Exposed thermal pad | Internally connected to GND; improves θJA by up to 52.5°C/W (TDFN) - mandatory PCB thermal via connection |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC JC42.4-TSE2002B3 Compliance | Guarantees interoperability with industry-standard DIMM thermal management firmware and SPD readers |
| User-Programmable Event Boundaries | Independent TUPPER, TLOWER, and TCRIT registers enable precise thermal trip points for throttling, logging, or fault reporting |
| Dual I²C Device Addresses | Separate 7-bit addresses (0x18–0x1F for sensor, 0x50–0x57 for EEPROM) prevent bus conflicts and simplify firmware partitioning |
| Configurable Event Output Polarity & Mode | Supports thermostat (comparator) or interrupt (latched) operation - eliminates need for external logic in host MCU designs |
| EEPROM Write Protection Architecture | PWP (permanent) and SWP (reversible) on lower 128 bytes ensure vendor SPD data immutability while allowing field updates to upper block |
Applications
| Server DIMM Thermal Monitoring | DDR4/DDR5 Memory Module SPD |
|---|---|
Use Scenario: Real-time die temperature tracking across multiple DIMMs in a 2U rack server during sustained memory bandwidth stress tests. IC Role / Device Role / Timing Role: Primary thermal sensor and SPD data hub - reads ambient temperature every 100 ms and responds to SMBus master queries for SPD byte 117–120 (temperature sensor info). Use Value: Enables dynamic memory frequency scaling based on actual module temperature, preventing thermal throttling and extending DRAM lifetime. | Use Scenario: Storing JEDEC-defined SPD data (vendor ID, part number, revision, manufacturing date) in DDR5 UDIMMs during factory programming. IC Role / Device Role / Timing Role: Nonvolatile SPD data container with hardware-enforced write protection - retains data across power cycles and prevents accidental overwrite of critical fields. Use Value: Eliminates need for external EEPROM, reduces BOM count, and ensures SPD compliance without firmware intervention. |
| Laptop Memory Subsystem Diagnostics | Industrial Embedded Memory Modules |
Use Scenario: Logging thermal history during laptop battery discharge cycles to correlate memory errors with junction temperature rise. IC Role / Device Role / Timing Role: Temperature logger and diagnostic data recorder - stores timestamped min/max/avg readings in EEPROM upper block (0x80–0xFF) via periodic I²C writes. Use Value: Provides field-serviceable thermal diagnostics without requiring OS-level drivers or additional storage media. | Use Scenario: Maintaining SPD compatibility in extended-temperature industrial memory modules operating from –40°C to +125°C ambient. IC Role / Device Role / Timing Role: High-reliability thermal sensor and SPD interface - validated for full spec range with ±1°C max accuracy and EEPROM read capability down to –40°C. Use Value: Ensures memory initialization robustness in harsh environments where commercial-grade sensors would fail calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar temperature sensor with SPD EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT30TS74-MA8-Y | Single-function temperature sensor (no EEPROM); ±0.5°C max accuracy over 0°C–+70°C; I²C up to 1 MHz | No SPD support; requires external EEPROM for DIMM use - increases board area and BOM cost | Select only if SPD functionality is handled elsewhere and higher accuracy outside +75°C–+95°C is needed |
| MCP9808-E/MS | Higher-accuracy sensor (±0.25°C typ. over –20°C–+100°C); no integrated EEPROM; 8-pin MSOP package | Requires separate SPD EEPROM; lacks PWP/SWP architecture - unsuitable for JEDEC-compliant DIMM certification | Choose for non-SPD applications needing better sub-ambient accuracy or smaller footprint than DFN-8 |
Compared with AT30TS74-MA8-Y and MCP9808-E/MS, the MCP98243T-BE/MCAA uniquely combines JEDEC SPD-compliant EEPROM with grade-B thermal accuracy in a single 8-pin package - eliminating interconnect complexity and ensuring out-of-box DIMM compliance without firmware adaptation.
Availability
MCP98243T-BE/MCAA is available at Aetrix Electronics and suitable for server DIMM thermal monitoring, DDR5 SPD data storage, and industrial embedded memory modules requiring stable component supply and long-term lifecycle support.
Supply support for MCP98243T-BE/MCAA 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 microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The MCP98243T-BE/MCAA belongs to Microchip's JEDEC-compliant thermal sensor family, engineered specifically for DRAM module SPD integration and real-time thermal management in high-density memory subsystems.
FAQ
What is the primary function of the MCP98243T-BE/MCAA in a memory module?
The MCP98243T-BE/MCAA serves a dual role: it acts as a precision temperature sensor meeting JEDEC JC42.4-TSE2002B3 specifications for DIMMs, and provides 2 Kbit of serial EEPROM dedicated to Serial Presence Detect (SPD) data storage. Its integrated design eliminates the need for separate thermal and SPD components, reducing board space and simplifying firmware integration in DDR4/DDR5 memory modules.
Does the MCP98243T-BE/MCAA support both temperature sensing and EEPROM functions over the same I²C bus?
Yes, the MCP98243T-BE/MCAA uses two distinct I²C device addresses on the same bus: 0x18–0x1F for the temperature sensor and 0x50–0x57 for the EEPROM. This separation prevents register collisions and allows independent access to sensor readings and SPD data without bus arbitration issues - a requirement for JEDEC SPD compliance.
How is write protection implemented in the MCP98243T-BE/MCAA's EEPROM?
The MCP98243T-BE/MCAA implements three EEPROM write protection modes: Permanent Write Protect (PWP) for addresses 0x00–0x7F using VDD-level voltage on A0, Software Reversible Write Protect (SWP) using 7–12 V on A0, and no protection for upper addresses 0x80–0xFF. This layered scheme ensures vendor SPD data remains immutable while allowing runtime updates to application-specific fields.
What is the accuracy specification of the MCP98243T-BE/MCAA across its operating temperature range?
The MCP98243T-BE/MCAA achieves ±0.2°C typical / ±1°C maximum accuracy from +75°C to +95°C (Grade B, per JC42.4-TSE2002B3), ±0.5°C typical / ±2°C maximum from +40°C to +125°C, and ±1°C typical / ±3°C maximum from –20°C to +125°C. Accuracy at –40°C is –1°C typical, validated for full industrial memory module operation.
Can the Event output of the MCP98243T-BE/MCAA be configured for interrupt or thermostat operation?
Yes, the Event pin is fully configurable via the CONFIG register: it can operate as an active-high or active-low comparator output (thermostat mode) or as a latched interrupt signal (microprocessor mode). The output remains asserted until cleared by host firmware or automatically upon temperature re-entry within bounds - supporting both hardware-triggered throttling and software-driven diagnostics.
MCP98243T-BE/MCAA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Temp Monitoring System (Sensor), DIMM DDR Memory
- Sensor Type:
- Internal
- Sensing Temperature:
- -40°C ~ 125°C
- Accuracy:
- ±3%
- Topology:
- ADC (Sigma Delta), Register Bank
- Output Type:
- I2C/SMBus
- Output Alarm:
- Yes
- Output Fan:
- No
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (2x3)
MCP98243T-BE/MCAA FAQ
1.How can I place an order for MCP98243T-BE/MCAA through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP98243T-BE/MCAA 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 MCP98243T-BE/MCAA reliable?
The price and inventory of MCP98243T-BE/MCAA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP98243T-BE/MCAA is usually 5 days.
3.What payment methods are accepted for MCP98243T-BE/MCAA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP98243T-BE/MCAA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP98243T-BE/MCAA?
MCP98243T-BE/MCAA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP98243T-BE/MCAA 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 MCP98243T-BE/MCAA?
For technical support, including MCP98243T-BE/MCAA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP98243T-BE/MCAA requirements.
6.How does Aetrix verify that MCP98243T-BE/MCAA is sourced from the original manufacturer or authorized distributors?
All MCP98243T-BE/MCAA 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 MCP98243T-BE/MCAA meets industry standards.
7.What is the process for return or replacement of MCP98243T-BE/MCAA?
All MCP98243T-BE/MCAA units undergo pre-shipment inspection (PSI). If there is an issue with MCP98243T-BE/MCAA, 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 MCP98243T-BE/MCAA part is unused and in its original packaging.
Return procedure for MCP98243T-BE/MCAA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCP98243T-BE/MCAA Tags
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EMC2101-ACZL-TR
Microchip Technology
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MCP9844T-BE/MNY
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EMC2101-R-ACZL-TR
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