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Microchip Technology MCP98243T-BE/MNYAA
- Part No.:
- MCP98243T-BE/MNYAA
- Manufacturer:
- Microchip Technology
- Category:
- Thermal Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
MCP98243T-BE/MNYAA.pdf
- Description:
- IC TEMP SENSOR 2WIRE 3V 8-TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,444
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Product details
Overview
MCP98243T-BE/MNYAA from Microchip Technology is a JEDEC JC42.4-TSE2002B3-compliant digital temperature sensor with integrated 2 Kbit (256 × 8) serial EEPROM for Serial Presence Detect (SPD) in memory modules. It delivers ±0.2°C typical / ±1°C maximum accuracy from +75°C to +95°C, operates from 2.7V to 5.5V, and features an open-drain Event output for thermal alerting in DIMM applications.
For engineers reviewing the MCP98243T-BE/MNYAA datasheet, MCP98243T-BE/MNYAA pinout, MCP98243T-BE/MNYAA application, or MCP98243T-BE/MNYAA equivalent, this page provides verified technical context, JEDEC-compliant accuracy specs, I²C timing parameters up to 400 kHz, EEPROM write protection modes, and validated DIMM-SPD use-case implementation guidance.
Technical Context
The MCP98243T-BE/MNYAA integrates a band-gap temperature sensor and ΔΣ ADC with user-programmable registers for event boundary configuration (TUPPER/TLOWER/TCRIT), shutdown control, and resolution selection (0.0625°C to 0.5°C steps). Its dual-domain architecture separates temperature sensing (VDD = 3.0–3.6 V) from EEPROM operation (VDD = 1.8–5.5 V).
It implements JEDEC JC42.4-TSE2002B3 compliance via grade-B accuracy spec, 2-wire I²C/SMBus interface supporting up to eight devices on one bus, and dedicated A0 pin for high-voltage software write protection (7–12 V). The Event output supports active-low/high comparator or interrupt modes with configurable polarity and hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Accuracy (Grade B) | ±0.2°C typ./±1°C max. at +75°C to +95°C - meets JEDEC TSE2002B3 requirement for DIMM thermal monitoring |
| I²C Bus Frequency | Up to 400 kHz - enables faster polling vs. MCP98242 (100 kHz limit), reducing system latency in high-density memory systems |
| EEPROM Capacity & Organization | 2 Kbit (256 × 8), split into permanent/software-write-protected lower 128 bytes (0x00–0x7F) and general-purpose upper 128 bytes (0x80–0xFF) |
| Supply Voltage Ranges | Sensor: 2.7–5.5 V; EEPROM: 1.8–5.5 V - allows flexible power domain design and backward compatibility with 1.8 V SPD buses |
| Event Output Type | Open-drain, configurable polarity - supports direct connection to microcontroller interrupt pins or thermostat logic without level-shifting |
| Thermal Response Time | 0.7 s (DFN-8 package) - enables rapid detection of transient thermal events in DDR4/DDR5 DIMMs during burst workloads |
| Shutdown Current | 1–3 µA - minimizes standby power in memory modules during system sleep states |
Pinout & Package
Package: 8-pin DFN (2 mm × 3 mm, exposed thermal pad), compliant with JEDEC MO-229WAYG variant. Thermal pad (EP) internally connected to GND for enhanced PCB heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Slave address LSB + EEPROM write protect enable | Configures I²C address bit 0; accepts 7–12 V HV pulse to activate software write protection for EEPROM lower block |
| A1 | Slave address bit 1 | Connects to VDD/GND to set device address (0011xxxA2A1A0); internal pull-down ensures default '0' when unconnected |
| A2 | Slave address bit 2 | Completes 3-bit address selection; enables up to 8 MCP98243T-BE/MNYAA devices on same I²C bus without conflict |
| GND | System ground reference | Reference for all analog/digital circuitry; EP pad must be soldered to same GND plane for thermal performance |
| SDA | Bidirectional I²C data line | Open-drain output 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 low time, enabling deterministic timing in multi-slave systems |
| Event | Open-drain thermal alert output | Asserts when TA exceeds TUPPER/TLOWER/TCRIT; de-asserts in shutdown mode (vs. MCP98242 which holds state) |
| VDD | Power supply input | Supplies both sensor and EEPROM; POR threshold at 2.2 V ensures reliable initialization across full 2.7–5.5 V range |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC JC42.4-TSE2002B3 Compliance | Validated Grade B accuracy and interface timing ensure drop-in qualification for DDR4/DDR5 DIMM SPD slots per industry standard |
| Configurable Event Output Polarity | Active-high or active-low mode selectable via CONFIG register - eliminates need for external inverters in interrupt-driven host systems |
| Dual-Voltage EEPROM Operation | 1.8–5.5 V EEPROM supply independent of sensor VDD - enables SPD compatibility with legacy 1.8 V memory controllers |
| Permanent & Reversible Write Protection | PWP (0x00–0x7F) and SWP (0x00–0x7F) modes prevent accidental overwrites of vendor ID, DRAM timing, and module config data |
| ΔΣ ADC with Programmable Resolution | 0.0625°C to 0.5°C step resolution - balances precision and conversion time (65–125 ms) for optimal thermal response in real-time monitoring |
| I²C Timeout Recovery | tOUT = 25–35 ms timeout on SCL stall - prevents bus lockup during firmware errors while maintaining EEPROM non-blocking behavior |
Applications
| Server DIMM Thermal Monitoring | Laptop Memory Module SPD |
|---|---|
|
Use Scenario: Real-time temperature tracking of DDR4/DDR5 memory modules in 1U/2U rack servers under sustained compute load. IC Role / Device Role / Timing Role: Primary JEDEC-compliant thermal sensor feeding temperature data to BMC/IPMI via SMBus for dynamic throttling and health reporting. Use Value: ±0.2°C accuracy in +75°C to +95°C range ensures precise thermal margining, preventing premature throttling while avoiding thermal runaway. |
Use Scenario: Storing and protecting vendor-specific SPD data (timings, density, manufacturer ID) in consumer laptop SO-DIMMs. IC Role / Device Role / Timing Role: Dual-function SPD EEPROM + temperature monitor co-located on memory module PCB, accessed via same I²C bus as memory controller. Use Value: Software-write-protected lower 128 bytes preserve critical SPD fields across BIOS updates; upper 128 bytes support OEM customization. |
| Industrial Embedded Memory Subsystem | Network Equipment Line Card Thermal Management |
|
Use Scenario: Temperature-aware memory subsystem in ruggedized industrial PCs operating across -20°C to +85°C ambient. IC Role / Device Role / Timing Role: Local thermal sensor triggering hardware shutdown via Event pin when DIMM junction exceeds safe limit, independent of host CPU. Use Value: Shutdown current ≤3 µA minimizes power draw in always-on edge devices; Event de-assertion in shutdown avoids false alarms during power cycling. |
Use Scenario: Multi-DIMM thermal supervision in carrier-grade switch/router line cards with dense memory layouts and limited airflow. IC Role / Device Role / Timing Role: Distributed thermal node providing per-module temperature alerts to centralized thermal management ASIC via shared I²C bus. Use Value: 400 kHz I²C speed enables sub-100 ms full-bus polling of 8 DIMMs, meeting real-time thermal response requirements for fan speed control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar temperature-sensing-with-SPD-EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP98242T-E/MS | Lower I²C max frequency (100 kHz), no EEPROM, Event output remains latched in shutdown mode | Targeted at cost-sensitive DIMMs where SPD is handled separately; lacks integrated EEPROM storage | Select when only temperature sensing is required and SPD data resides elsewhere (e.g., separate EEPROM) |
| AT30TS74-MA8Y | Single-function JEDEC temp sensor (no EEPROM), ±0.5°C max accuracy over -20°C to +125°C, 1.7–5.5 V supply | Used in non-SPD applications like CPU VRM monitoring or board-level thermal guardbanding | Choose for simpler thermal monitoring where EEPROM integration adds unnecessary complexity or cost |
Compared with MCP98242T-E/MS and AT30TS74-MA8Y, the MCP98243T-BE/MNYAA uniquely combines JEDEC-grade accuracy, integrated SPD EEPROM with dual write-protection, and 400 kHz I²C - making it the only single-chip solution qualified for DDR4/DDR5 DIMM thermal + SPD requirements.
Availability
MCP98243T-BE/MNYAA is available at Aetrix Electronics and suitable for server DIMM manufacturing, laptop memory module assembly, and industrial embedded memory subsystems requiring stable component supply and JEDEC-compliant thermal validation.
Supply support for MCP98243T-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 microcontrollers, analog components, and memory solutions, with deep expertise in embedded control and thermal management ICs.
The MCP98243T-BE/MNYAA belongs to Microchip's JEDEC-compliant memory module thermal sensor family, designed specifically to meet SPD requirements for DDR4/DDR5 DIMMs while delivering high-accuracy, low-power thermal monitoring in space-constrained packages.
FAQ
What JEDEC specification does the MCP98243T-BE/MNYAA comply with?
The MCP98243T-BE/MNYAA complies with JEDEC JC42.4-TSE2002B3 for memory module thermal sensors. This mandates Grade B accuracy (±0.2°C typical / ±1°C max. at +75°C to +95°C), specific I²C timing, and functional requirements for DIMM SPD integration - all verified in Microchip's DS22153C datasheet.
How does the EEPROM write protection work on the MCP98243T-BE/MNYAA?
The MCP98243T-BE/MNYAA supports Permanent Write Protect (PWP) and Software Write Protect (SWP) for addresses 0x00–0x7F. PWP is activated by applying 7–12 V to the A0 pin, locking those bytes permanently. SWP uses I²C commands to toggle protection on/off, allowing field-updatable SPD data while safeguarding critical vendor fields.
What is the maximum I²C clock frequency supported by the MCP98243T-BE/MNYAA?
The MCP98243T-BE/MNYAA supports I²C clock frequencies up to 400 kHz in fast-mode operation. This is double the 100 kHz limit of the pin-compatible MCP98242, enabling faster temperature polling and EEPROM access in high-throughput memory systems.
Can the MCP98243T-BE/MNYAA operate from a 1.8 V supply?
Yes - the EEPROM portion of the MCP98243T-BE/MNYAA operates from 1.8 V to 5.5 V, enabling compatibility with 1.8 V SPD buses. However, the temperature sensor requires 2.7–5.5 V; both domains function correctly when VDD = 3.3 V, the typical DIMM supply rail.
What happens to the Event output during shutdown mode on the MCP98243T-BE/MNYAA?
In shutdown mode, the MCP98243T-BE/MNYAA actively de-asserts the Event output, returning it to high-impedance (open-drain released) state. This differs from the MCP98242, where Event retains its prior logic level - a key reliability feature for systems requiring clean thermal interrupt reset on power cycle.
MCP98243T-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), 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:
- No
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (2x3)
MCP98243T-BE/MNYAA FAQ
1.How can I place an order for MCP98243T-BE/MNYAA through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP98243T-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 MCP98243T-BE/MNYAA reliable?
The price and inventory of MCP98243T-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 MCP98243T-BE/MNYAA is usually 5 days.
3.What payment methods are accepted for MCP98243T-BE/MNYAA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP98243T-BE/MNYAA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP98243T-BE/MNYAA?
MCP98243T-BE/MNYAA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP98243T-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 MCP98243T-BE/MNYAA?
For technical support, including MCP98243T-BE/MNYAA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP98243T-BE/MNYAA requirements.
6.How does Aetrix verify that MCP98243T-BE/MNYAA is sourced from the original manufacturer or authorized distributors?
All MCP98243T-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 MCP98243T-BE/MNYAA meets industry standards.
7.What is the process for return or replacement of MCP98243T-BE/MNYAA?
All MCP98243T-BE/MNYAA units undergo pre-shipment inspection (PSI). If there is an issue with MCP98243T-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 MCP98243T-BE/MNYAA part is unused and in its original packaging.
Return procedure for MCP98243T-BE/MNYAA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCP98243T-BE/MNYAA Tags
-
EMC2101-ACZL-TR
Microchip Technology
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MCP9844T-BE/MNY
Microchip Technology
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EMC2101-R-ACZL-TR
Microchip Technology
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onsemi
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