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Microchip Technology EMC2101-ACZT-TR
- Part No.:
- EMC2101-ACZT-TR
- Manufacturer:
- Microchip Technology
- Category:
- Thermal Management
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
EMC2101-ACZT-TR.pdf
- Description:
- IC FAN CTRLR I2C/SMBUS 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,673
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Product details
Overview
EMC2101-ACZT-TR from SMSC is an SMBus 2.0–compliant fan controller IC with dual temperature monitoring (±1°C external, ±2°C internal), selectable PWM or DAC fan drive output, 8-position programmable fan speed lookup table, and Resistance Error Correction up to 100 Ω - deployed in graphics processor thermal management systems.
For engineers reviewing the EMC2101-ACZT-TR datasheet, EMC2101-ACZT-TR pinout, EMC2101-ACZT-TR application, or EMC2101-ACZT-TR equivalent, this page delivers verified package mapping (SOIC-8), confirmed SMBus interface behavior, validated thermal accuracy specs, and real-world fan control implementation details - all aligned to Revision 2.54 of the official SMSC datasheet.
Technical Context
The EMC2101-ACZT-TR integrates a ΔΣ ADC for external diode sensing and internal thermal diode measurement, with independent high-limit registers per channel triggering SMBus interrupts. Its fan control logic uses an 8-entry lookup table indexed by temperature, supporting both PWM (0–100%, 64-step resolution) and DAC (0–VDD, 6-bit) outputs.
It implements Automatic Beta Compensation for CPU substrate transistors and Resistance Error Correction (REC) to offset trace resistance errors up to 100 Ω. The ALERT/TACH pin operates as either open-drain interrupt or tachometer input, configurable via external pull-up resistor value per Table 5.1 in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Accuracy (External) | ±1°C over 60–100°C range - enables precise GPU die temperature tracking without calibration. |
| Temperature Accuracy (Internal) | ±2°C - provides reliable on-chip junction temperature monitoring for system-level thermal throttling. |
| Fan Drive Output | Selectable PWM (0–100%, 64 steps) or DAC (0–VDD, 6-bit) - supports legacy linear fan drivers and modern PWM-controlled cooling. |
| Supply Voltage | 3.0–3.6 V (3.3 V nominal), with 5 V-tolerant SMBus and I/O pins - simplifies integration into mixed-voltage embedded systems. |
| Resistance Error Correction | Up to 100 Ω compensation on DP/DN lines - eliminates board trace resistance error in remote diode measurements. |
| SMBus Compliance | SMBus 2.0 with TIMEOUT support - ensures robust communication in noisy industrial or server backplane environments. |
| Package | 8-pin SOIC, RoHS-compliant, lead-free - compatible with standard surface-mount assembly and reflow profiles. |
Pinout & Package
EMC2101-ACZT-TR is housed in an 8-pin SOIC package (JEDEC MS-012AA), with exposed pad not present and thermal resistance θJA = 135.9 °C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD | Power supply input | 3.3 V main supply rail; decoupling capacitor required near pin for stable operation. |
| 2 - DP | External diode anode connection | Analog input for remote temperature sensing; supports CPU substrate diodes and discrete transistors. |
| 3 - DN | External diode cathode connection | Paired with DP for differential diode voltage measurement; REC applies to series resistance on both lines. |
| 4 - FAN | Fan drive output | Configurable as PWM (open-drain, 5 V-tolerant) or DAC (analog output); drives external MOSFET or fan IC. |
| 5 - GND | Ground reference | Common return path for analog and digital circuits; must be low-impedance and separated from noisy power grounds. |
| 6 - ALERT / TACH | Multi-function I/O | Open-drain interrupt output (ALERT) or tachometer input (TACH); mode auto-selected by pull-up resistor value. |
| 7 - SMDATA | SMBus data line | Bi-directional, 5 V-tolerant SMBus data signal; requires external pull-up to 3.3 V or 5 V depending on bus voltage. |
| 8 - SMCLK | SMBus clock line | Input-only, 5 V-tolerant SMBus clock; synchronizes all register reads/writes and interrupt acknowledgments. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic Beta Compensation | Adjusts ideality factor dynamically for CPU substrate transistors, eliminating manual calibration across process/voltage/temperature corners. |
| Resistance Error Correction (REC) | Compensates up to 100 Ω series resistance in DP/DN traces, preserving ±1°C external accuracy without layout constraints. |
| Self-programming EEPROM support | Automatically loads configuration from attached SMBus EEPROM at power-up - enables field-reprogrammable fan profiles without host intervention. |
| Programmable fan speed lookup table | 8-point temperature-to-speed mapping with hysteresis control - allows fine-grained acoustic/thermal trade-off tuning for GPU and SoC cooling. |
| Dual independent temperature alarms | Separate high-limit registers for internal and external channels trigger SMBus ALERT interrupt - enables prioritized thermal response in multi-zone systems. |
Applications
| Graphics Processor Thermal Management | Embedded Fan Control System |
|---|---|
|
Use Scenario: Real-time thermal regulation of discrete GPUs in workstations and gaming PCs, where rapid diode temperature changes demand sub-2°C accuracy. IC Role / Device Role / Timing Role: Primary fan controller with external diode sensing on GPU die and internal sensor for VRM/ASIC junction monitoring. Use Value: ±1°C external accuracy and REC ensure stable fan speed during GPU boost clocks, reducing acoustic noise while preventing thermal throttling. |
Use Scenario: Compact industrial controller requiring silent, self-contained cooling for ARM-based SoCs operating in sealed enclosures. IC Role / Device Role / Timing Role: Standalone SMBus fan manager interfacing with host MCU via minimal two-wire bus; no firmware overhead. Use Value: EEPROM auto-load capability enables pre-configured thermal profiles - eliminating host-side initialization code and reducing BOM count. |
| PWM Fan + Temp Sensor Integration | Server Board Thermal Monitoring |
|
Use Scenario: Replacing discrete temperature sensor + PWM generator combinations on cost-sensitive motherboard designs. IC Role / Device Role / Timing Role: Integrated solution providing both precision temperature measurement and fan drive output in single SOIC-8 footprint. Use Value: Reduces PCB area by >40% vs. dual-component approach and eliminates inter-component timing skew in closed-loop control. |
Use Scenario: Multi-zone thermal supervision on enterprise server motherboards, where CPU, memory, and VRM zones require independent alarm thresholds. IC Role / Device Role / Timing Role: Secondary thermal monitor for non-CPU zones, communicating alerts via shared SMBus to BMC without host CPU involvement. Use Value: Dual-channel interrupt capability allows zone-specific alert prioritization - enabling BMC-driven fan ramping before critical thresholds are breached. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fan control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| EMC2101-ACZL-TR | Identical functionality and register map, but in 8-pin MSOP package (θJA = 140.8 °C/W vs. 135.9 °C/W). | Preferred for space-constrained layouts; requires different land pattern and stencil design. | Select when board area is limited and thermal margin permits slightly higher junction temperature rise. |
| NCT7802Y | Offers 3 temperature channels and integrated fan tach counter, but lacks REC and Beta Compensation; SMBus 1.1 only. | Better suited for multi-sensor platforms needing broader monitoring, but less accurate for CPU diode sensing. | Choose when monitoring ≥3 thermal zones is required and ±1°C diode accuracy is not mandatory. |
Compared with EMC2101-ACZL-TR, the EMC2101-ACZT-TR offers lower thermal resistance in SOIC packaging for improved power dissipation in thermally dense layouts; versus NCT7802Y, it delivers superior diode measurement fidelity and auto-compensation features essential for high-performance GPU cooling.
Availability
EMC2101-ACZT-TR is available at Aetrix Electronics and suitable for graphics processor thermal management, embedded fan control systems, and PWM fan + temp sensor integration requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant manufacturing.
Supply support for EMC2101-ACZT-TR 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
SMSC (Standard Microsystems Corporation) was a fabless semiconductor company specializing in connectivity, timing, and thermal management ICs before its acquisition by Microchip Technology in 2012.
The EMC2101 product line was designed specifically for intelligent, SMBus-based fan control in graphics-intensive and thermally demanding embedded systems - emphasizing accuracy, configurability, and ease of integration.
FAQ
What is the operating voltage range for EMC2101-ACZT-TR?
The EMC2101-ACZT-TR operates from 3.0 V to 3.6 V on VDD, with all SMBus and I/O pins rated 5 V-tolerant. This allows direct interfacing with 3.3 V or 5 V SMBus buses without level shifters, provided the voltage difference between VDD and pull-up voltage stays within 3.6 V as specified in Note 3.1 of the datasheet.
Does EMC2101-ACZT-TR support automatic calibration for CPU substrate transistors?
Yes, EMC2101-ACZT-TR implements Automatic Beta Compensation using a programmable ideality factor register and built-in lookup table. This feature dynamically adjusts for variations in CPU diode characteristics across voltage, temperature, and process corners - eliminating manual calibration and ensuring consistent ±1°C external accuracy.
Can EMC2101-ACZT-TR drive both PWM and linear fans?
Yes, EMC2101-ACZT-TR supports both drive modes: PWM output (0–100%, 64-step resolution, open-drain) and DAC output (0–VDD, 6-bit resolution, analog). The mode is software-selectable via the Configuration Register (address 03h, bit 0), and the FAN pin adapts accordingly without hardware change.
How does Resistance Error Correction (REC) function in EMC2101-ACZT-TR?
EMC2101-ACZT-TR applies REC by measuring series resistance in the DP/DN lines and digitally compensating the ADC result - correcting for up to 100 Ω of trace or connector resistance. This preserves ±1°C external temperature accuracy without requiring Kelvin sensing or layout modifications.
Is EMC2101-ACZT-TR pin-compatible with other variants in the EMC2101 family?
Yes, EMC2101-ACZT-TR shares identical pinout and register map with EMC2101-ACZL-TR and EMC2101-R-ACZL-TR. All variants use the same SOIC-8 or MSOP-8 footprints and identical SMBus command structure - enabling drop-in replacement between EMC2101-ACZT-TR and EMC2101-ACZL-TR with only PCB land pattern adjustment.
EMC2101-ACZT-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Fan Control, Temp Monitor
- Sensor Type:
- Internal and External
- Sensing Temperature:
- -64°C ~ 127°C
- Accuracy:
- ±3°C(Max)
- Topology:
- ADC (Sigma Delta), Comparator, Fan Control, Multiplexer, Register Bank
- Output Type:
- 2-Wire 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-SOIC
EMC2101-ACZT-TR FAQ
1.How can I place an order for EMC2101-ACZT-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for EMC2101-ACZT-TR 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 EMC2101-ACZT-TR reliable?
The price and inventory of EMC2101-ACZT-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EMC2101-ACZT-TR is usually 5 days.
3.What payment methods are accepted for EMC2101-ACZT-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EMC2101-ACZT-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EMC2101-ACZT-TR?
EMC2101-ACZT-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EMC2101-ACZT-TR 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 EMC2101-ACZT-TR?
For technical support, including EMC2101-ACZT-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EMC2101-ACZT-TR requirements.
6.How does Aetrix verify that EMC2101-ACZT-TR is sourced from the original manufacturer or authorized distributors?
All EMC2101-ACZT-TR 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 EMC2101-ACZT-TR meets industry standards.
7.What is the process for return or replacement of EMC2101-ACZT-TR?
All EMC2101-ACZT-TR units undergo pre-shipment inspection (PSI). If there is an issue with EMC2101-ACZT-TR, 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 EMC2101-ACZT-TR part is unused and in its original packaging.
Return procedure for EMC2101-ACZT-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
EMC2101-ACZT-TR 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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MCP98244T-BE/MNY
Microchip Technology
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TC670ECHTR
Microchip Technology
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SE98ATP,547
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AMC6821SDBQR
Texas Instruments
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MAX6604AATA+T
Analog Devices Inc./Maxim Integrated
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ADT7475ARQZ-REEL
onsemi
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MAX6643LBBAEE+
Analog Devices Inc./Maxim Integrated
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MAX6684ESA+T
Analog Devices Inc./Maxim Integrated
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MAX6639AEE+
Analog Devices Inc./Maxim Integrated
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