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Microchip Technology MCP98242T-BE/MNYBAA
- Part No.:
- MCP98242T-BE/MNYBAA
- Manufacturer:
- Microchip Technology
- Category:
- Thermal Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
MCP98242T-BE/MNYBAA.pdf
- Description:
- IC TEMP SENSOR 2WIRE 8-TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,865
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Product details
Overview
MCP98242T-BE/MNYBAA from Microchip Technology is a JEDEC JC42.4-compliant digital temperature sensor with integrated 256-byte serial EEPROM, designed for DDR memory module SPD applications. It delivers ±0.5°C typical accuracy from +75°C to +95°C, operates from 3.0V to 3.6V, draws 200 µA typical active current and 3 µA max shutdown current, and interfaces via I²C/SMBus at up to 100 kHz.
For engineers reviewing the MCP98242T-BE/MNYBAA datasheet, MCP98242T-BE/MNYBAA pinout, MCP98242T-BE/MNYBAA application, or MCP98242T-BE/MNYBAA equivalent, key selection criteria include SPD EEPROM write-protection architecture, ±0.5°C thermal accuracy in DIMM operating range, open-drain Event output configurability (comparator/interrupt/critical), and DFN-8 package thermal resistance of 84.5°C/W.
Technical Context
The MCP98242T-BE/MNYBAA integrates a band-gap temperature sensor and ΔΣ ADC with user-programmable registers for boundary monitoring, hysteresis (0°C/1.5°C/3°C/6°C), and shutdown control. Its dual-function Event pin supports active-high/active-low comparator output or microprocessor interrupt signaling based on TUPPER/TLOWER/TCRIT thresholds.
The 256-byte EEPROM is partitioned into lower 128 bytes (00h–7Fh) with permanent or software-reversible write-protection for SPD vendor data, and upper 128 bytes (80h–FFh) for general-purpose storage. Serial interface timing complies with SMBus 2.0 and Standard-mode I²C, including 40 ms timeout reset for the temperature sensor block.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Accuracy | ±0.5°C (typ.) from +75°C to +95°C - meets JEDEC JC42.4 requirement for DIMM thermal monitoring |
| Supply Voltage Range | 3.0V to 3.6V - optimized for DDR memory subsystems; POR threshold at 2.3V (sensor), 1.6V (EEPROM) |
| Active Current | 200 µA (typ.) - enables low-power thermal sensing without compromising conversion rate |
| Shutdown Current | 3 µA (max.) - preserves system-level power budget during idle DIMM states |
| I²C/SMBus Speed | 100 kHz max - supports standard bus timing with tSU-START ≥ 4.7 µs and tOUT = 40 ms (temp sensor) |
| EEPROM Endurance | 1 million write cycles - ensures reliable SPD data updates over product lifetime |
| Thermal Resistance (θJA) | 84.5°C/W (DFN-8) - defines PCB thermal design margin for junction temperature control |
Pinout & Package
Package: 8-pin DFN (2 mm × 3 mm, exposed thermal pad). The EP is internally connected to GND and must be soldered to a GND plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Slave Address LSB | Configures bit 0 of 7-bit I²C address (0011xxx); tied high/low to select among 8 devices on same bus |
| A1 | Slave Address MSB-1 | Configures bit 1 of 7-bit I²C address; enables multi-device DIMM thermal monitoring without address conflict |
| A2 | Slave Address MSB-2 | Configures bit 2 of 7-bit I²C address; completes 3-bit user-selectable address space (0011xxx) |
| GND | Ground Reference | Common return for analog sensor, digital logic, and EP; required for accurate temperature measurement |
| SDA | Bidirectional Data Line | I²C/SMBus data channel; requires external pull-up to VDD; supports ACK/NAK and repeated start protocols |
| SCLK | Clock Input | Master-generated clock; timing-critical path with tHIGH ≥ 4.0 µs and tLOW ≥ 4.7 µs |
| Event | Open-Drain Alert Output | Signals temperature excursions; configurable as comparator (thermostat) or interrupt; VOL ≤ 0.4 V @ 3 mA |
| VDD | Power Supply | 3.0–3.6 V input; powers both sensor and EEPROM; decoupling capacitor recommended per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC JC42.4 Compliance | Guarantees interoperability with DDR memory modules requiring standardized thermal sensor behavior and register map |
| SPD EEPROM Partitioning | Lower 128 bytes permanently or reversibly write-protected for immutable vendor data; upper 128 bytes freely writable |
| User-Programmable Hysteresis | Four selectable values (0°C/1.5°C/3°C/6°C) prevent output chatter near trip thresholds in thermally noisy environments |
| Configurable Event Output Mode | Supports thermostat (comparator), microprocessor interrupt, or critical-only signaling - no external logic required |
| Shutdown Mode Retention | Holds last valid temperature reading in TA register during low-power state, enabling fast wake-up without re-conversion delay |
Applications
| DIMM Thermal Monitoring | Server Memory Subsystem |
|---|---|
|
Use Scenario: Real-time temperature tracking of DDR4/DDR5 memory modules during high-bandwidth operation. IC Role / Device Role / Timing Role: JEDEC-compliant thermal sensor + SPD EEPROM, providing calibrated temperature data and persistent module identification. Use Value: Enables dynamic memory throttling and predictive failure analysis using ±0.5°C accuracy in the critical +75°C to +95°C range. |
Use Scenario: Multi-channel memory thermal management in rack-mounted servers with hot-swap DIMMs. IC Role / Device Role / Timing Role: Slave device on shared I²C bus, supporting up to eight MCP98242T-BE/MNYBAA units with unique A2:A0 addresses. Use Value: Eliminates need for discrete SPD EEPROM and separate thermal sensor, reducing BOM count and PCB footprint. |
| Laptop Memory Management | Industrial Embedded Memory Modules |
|
Use Scenario: Compact thermal supervision of SO-DIMM modules in space-constrained laptop designs. IC Role / Device Role / Timing Role: Low-power temperature monitor with 3 µA shutdown current and 65 ms conversion time. Use Value: Extends battery life by enabling aggressive thermal-aware power gating without sacrificing measurement fidelity. |
Use Scenario: Ruggedized memory modules deployed in industrial controllers with extended temperature cycling. IC Role / Device Role / Timing Role: High-reliability SPD EEPROM with 1M write endurance and permanent write-protection for calibration data. Use Value: Ensures long-term data integrity across -40°C to +125°C ambient range with no field corruption risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar temperature sensor + SPD EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT30TS75-MA8-Y | ±1°C accuracy over full -40°C to +125°C range; no integrated SPD EEPROM; standalone thermal sensor only | Requires external EEPROM for SPD functionality; lacks TUPPER/TLOWER/TCRIT register set and Event output configuration | Select when SPD storage is handled separately and wider accuracy tolerance is acceptable across full temperature range |
| MCP9808-E/MS | Same ±0.5°C accuracy in +75°C to +95°C range; no EEPROM; 8-pin MSOP package; θJA = 139°C/W | Cannot store SPD data; lacks write-protect architecture and Event output flexibility; higher thermal resistance limits placement options | Select for cost-sensitive thermal monitoring where SPD functionality is unnecessary and board space allows larger package |
Compared with AT30TS75-MA8-Y and MCP9808-E/MS, the MCP98242T-BE/MNYBAA uniquely combines JEDEC-compliant thermal accuracy, SPD EEPROM with hardware/software write-protection, and programmable Event output - eliminating external components and enabling single-chip DIMM compliance.
Availability
MCP98242T-BE/MNYBAA is available at Aetrix Electronics and suitable for DIMM modules, server memory subsystems, and industrial embedded memory applications requiring stable component supply, JEDEC-compliant thermal sensing, and SPD EEPROM reliability.
Supply support for MCP98242T-BE/MNYBAA 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, with core expertise in embedded control and connectivity.
The MCP98242 product line was developed specifically for DDR memory thermal management and Serial Presence Detect compliance, targeting JEDEC JC42.4 requirements in high-density computing platforms.
FAQ
What is the primary function of the MCP98242T-BE/MNYBAA in a memory module?
The MCP98242T-BE/MNYBAA serves as a JEDEC JC42.4-compliant digital temperature sensor and SPD EEPROM in one device. It measures ambient temperature with ±0.5°C typical accuracy from +75°C to +95°C and stores vendor-specific memory module data in its 256-byte EEPROM - enabling thermal-aware memory control and standardized DIMM identification without external components.
Does the MCP98242T-BE/MNYBAA support I²C and SMBus protocols simultaneously?
Yes, the MCP98242T-BE/MNYBAA implements a 2-wire interface fully compatible with both Standard-mode I²C (up to 100 kHz) and SMBus 2.0 specifications. Its timing parameters - including tSU-START ≥ 4.7 µs, tOUT = 40 ms, and open-drain Event output - meet electrical and protocol requirements for either bus, allowing seamless integration into systems using either standard.
How is write protection implemented in the MCP98242T-BE/MNYBAA's EEPROM?
The MCP98242T-BE/MNYBAA's 256-byte EEPROM is split into two 128-byte blocks: addresses 00h–7Fh support permanent (PWP) or software-reversible (SWP) write-protection via A0 pin voltage, while addresses 80h–FFh remain unprotected for general use. This architecture ensures immutability of critical SPD data while allowing runtime updates to auxiliary fields.
Can the Event output of the MCP98242T-BE/MNYBAA be used as both a comparator and an interrupt?
Yes, the open-drain Event pin of the MCP98242T-BE/MNYBAA is fully configurable via the CONFIG register. It can operate as an active-high/active-low comparator output for thermostat control, a temperature event interrupt for microprocessor polling, or a critical-only alert - all without external circuitry, using only register writes to EVT_SEL and EVT_POL bits.
What package type does the MCP98242T-BE/MNYBAA use and why is the exposed pad important?
The MCP98242T-BE/MNYBAA uses an 8-pin DFN package (2 mm × 3 mm) with an exposed thermal pad (EP). The EP is internally connected to GND and must be soldered to a PCB ground plane to achieve the specified θJA of 84.5°C/W - ensuring safe junction temperature under continuous operation and maintaining ±0.5°C accuracy across the JEDEC-defined thermal range.
MCP98242T-BE/MNYBAA 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), DIMM DDR Memory
- Sensor Type:
- Internal
- Sensing Temperature:
- -40°C ~ 125°C
- Accuracy:
- ±3°C(Max)
- Topology:
- ADC (Sigma Delta), Register Bank
- Output Type:
- I2C/SMBus
- Output Alarm:
- Yes
- Output Fan:
- Yes
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (2x3)
MCP98242T-BE/MNYBAA FAQ
1.How can I place an order for MCP98242T-BE/MNYBAA through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP98242T-BE/MNYBAA 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 MCP98242T-BE/MNYBAA reliable?
The price and inventory of MCP98242T-BE/MNYBAA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP98242T-BE/MNYBAA is usually 5 days.
3.What payment methods are accepted for MCP98242T-BE/MNYBAA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP98242T-BE/MNYBAA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP98242T-BE/MNYBAA?
MCP98242T-BE/MNYBAA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP98242T-BE/MNYBAA 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 MCP98242T-BE/MNYBAA?
For technical support, including MCP98242T-BE/MNYBAA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP98242T-BE/MNYBAA requirements.
6.How does Aetrix verify that MCP98242T-BE/MNYBAA is sourced from the original manufacturer or authorized distributors?
All MCP98242T-BE/MNYBAA 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 MCP98242T-BE/MNYBAA meets industry standards.
7.What is the process for return or replacement of MCP98242T-BE/MNYBAA?
All MCP98242T-BE/MNYBAA units undergo pre-shipment inspection (PSI). If there is an issue with MCP98242T-BE/MNYBAA, 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 MCP98242T-BE/MNYBAA part is unused and in its original packaging.
Return procedure for MCP98242T-BE/MNYBAA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCP98242T-BE/MNYBAA Tags
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