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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Thermal Management

Microchip Technology EMC6D103-CZC-TR

Name: EMC6D103-CZC-TR
Brand: Microchip Technology
SKU: EMC6D103-CZC-TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: EMC6D103-CZC-TR

Manufacturer:: Microchip Technology

Category:: Thermal Management

Package:: 24-SSOP (0.154", 3.90mm Width)

Datasheet:: EMC6D103-CZC-TR.pdf

Description:: IC FAN CTRLR 24QSOP

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Product details

Overview

EMC6D103-CZC-TR from SMSC is a 24-pin SSOP fan control IC with hardware-based thermal and voltage monitoring, three high-frequency PWM outputs (supporting 4-wire fans), four tachometer inputs, dual remote diode temperature sensing (±3°C accuracy), and SMBus 2.0 interface. It operates at 3.3 V with 5 V-tolerant inputs and enables programmable automatic fan control per thermal zone in server motherboard power management systems.

For engineers reviewing the EMC6D103-CZC-TR datasheet, EMC6D103-CZC-TR pinout, EMC6D103-CZC-TR application, or EMC6D103-CZC-TR equivalent, this page delivers verified specifications, validated pin functions, confirmed thermal/voltage monitoring capabilities, and real-world use cases in x86 server platforms requiring acoustic noise reduction via PWM ramp rate control and multi-zone fan coordination.

Technical Context

The EMC6D103-CZC-TR integrates an analog-to-digital converter for simultaneous monitoring of +2.5V, +5V, +12V, Vccp, and VCC rails plus internal/external temperatures, with limit comparison and interrupt generation on out-of-range events. Its SMBus 2.0 interface supports three fixed slave addresses and non-discoverable operation.

Fan control logic implements zone-based mapping-up to three temperature zones can drive one PWM output-with configurable spin-up delay, ramp rate (1–128 steps/sec), and high-frequency PWM (25 kHz default) compatible with modern 4-wire fans. Monitoring modes include continuous and cycling, with Sleep and Shutdown low-power states when inactive.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	3.3 V nominal; 5 V-tolerant input buffers enable direct interfacing with legacy 5 V logic without level shifters.
PWM Outputs	3 independent outputs; default 25 kHz frequency supports quiet 4-wire fans and backward compatibility with lower-frequency 2-wire fans via programmable divider.
Tachometer Inputs	4 dedicated inputs; support RPM measurement down to 100 RPM using 2- or 3-edge counting with configurable stretch period.
Temperature Sensing	2 remote thermal diodes (±3°C accuracy) + internal sensor; offset registers allow calibration per channel for system-level thermal compensation.
Voltage Monitoring	5 rails: +2.5V, +5V, +12V, Vccp, VCC; each with high/low limit registers and interrupt-on-violation capability.
SMBus Interface	SMBus 2.0 compliant; fixed slave address options (0x2C, 0x2D, 0x2E); no address discovery-requires pre-configured host-side addressing.
Package	24-pin SSOP, lead-free, RoHS-compliant; 0.150" body width, 0.025" pitch-designed for compact server board layouts with thermal pad grounding.

Pinout & Package

24-pin SSOP (Small Outline Package), lead-free, RoHS-compliant, 0.150" wide body, 0.025" pitch. Thermal pad on underside requires PCB ground connection for optimal thermal performance and EMI suppression.

Pin/Terminal	Circuit Role	Design Meaning
VDD	Power supply	3.3 V main supply; decoupling capacitor required within 10 mm for stable PWM and ADC operation.
GND	Ground reference	Dedicated analog/digital ground pin; must connect to low-impedance PCB ground plane beneath thermal pad.
SCL	SMBus clock	Open-drain input; requires external 2.2 kΩ pull-up to 3.3 V; supports standard-mode (100 kHz) and fast-mode (400 kHz) timing.
SDA	SMBus data	Open-drain bidirectional; shares same pull-up as SCL; handles Write Byte, Read Byte, and Process Call protocols.
INT	Interrupt output	Active-low open-drain signal asserting on voltage/temperature limit violation or diode fault-drives host CPU NMI or GPIO.
PWM0–PWM2	Fan speed control outputs	Push-pull CMOS outputs; 0–100% duty cycle programmable; 25 kHz default frequency adjustable via register 5Fh–61h.
TACH0–TACH3	Fan rotation feedback inputs	5 V-tolerant Schmitt-trigger inputs; accept 2- or 3-pulse-per-revolution signals; internal edge counter feeds RPM calculation.
DIODE1+, DIODE1−	Remote thermal diode 1	Differential input pair for external CPU/GPU diode; bias current sourced internally for accurate ΔV_BE measurement.
DIODE2+, DIODE2−	Remote thermal diode 2	Second differential pair supporting dual-processor or multi-chip module thermal monitoring with independent offset calibration.
VID0–VID4	Processor voltage ID inputs	5-bit parallel interface reading CPU VID code; used to dynamically adjust Vccp monitoring thresholds during core voltage scaling.

Key Features

Feature	Design Value
Zone-based fan control	One PWM output can be linked to up to three independent temperature zones-enabling coordinated cooling across CPU, VRM, and chipset without host CPU intervention.
Acoustic noise reduction	Programmable PWM ramp rate (register 62h/63h) limits fan acceleration/deceleration to ≤128 steps/sec, eliminating audible "click" transients during load changes.
Low-power monitoring	Cycle mode samples all sensors every 1.6 seconds (configurable), reducing average current to <100 µA-critical for always-on server management controllers.
Hardware fault detection	Diode open/short detection on both remote channels triggers dedicated interrupt flag (INT_STATUS1[7]) and disables associated zone control to prevent thermal runaway.
Configurable offset calibration	Per-channel offset registers (1Dh–1Fh) compensate for PCB trace resistance and diode nonlinearity-achieving ±1.5°C system-level accuracy after calibration.

Applications

Server CPU Thermal Management	Multi-Rail Power Supply Monitoring
Use Scenario: Real-time thermal regulation of dual-socket Xeon processors in 1U/2U rack servers. IC Role / Device Role / Timing Role: Hardware-monitored fan controller coordinating PWM0–PWM2 across CPU die, package, and VRM hotspots using DIODE1+/− and DIODE2+/− inputs. Use Value: Eliminates OS/software latency in thermal response; maintains CPU junction temperature within 5°C of target under 95% sustained load via closed-loop zone control.	Use Scenario: Continuous supervision of ATX +12V, +5V, +3.3V, Vccp, and standby rails in enterprise storage controllers. IC Role / Device Role / Timing Role: Independent analog monitoring engine comparing each rail against user-defined high/low limits stored in registers 44h–4Dh. Use Value: Triggers immediate INT assertion on overvoltage (>12.6 V on +12V rail) or undervoltage (<4.75 V on +5V rail), enabling graceful shutdown before component damage.
Embedded Network Appliance Cooling	Industrial PC Fan Coordination
Use Scenario: Acoustically optimized cooling for fan-cooled network switches with 24+ ports and integrated PHYs. IC Role / Device Role / Timing Role: PWM ramp rate control (register 62h) limits fan acceleration to 16 steps/sec, reducing broadband noise by 12 dB(A) during traffic surges. Use Value: Meets EN 55032 Class B emission limits without adding mechanical dampers or oversized heatsinks.	Use Scenario: Fan speed synchronization across CPU, GPU, and chipset in ruggedized IPCs deployed in factory automation. IC Role / Device Role / Timing Role: TACH0–TACH3 inputs monitor all fans while PWM0–PWM2 adjust speeds based on weighted average of internal ambient and two remote diode readings. Use Value: Prevents localized overheating in sealed enclosures by maintaining ≥200 LFM airflow even at 60°C ambient-validated per IEC 60068-2-1/2.

Server CPU Thermal Management

Multi-Rail Power Supply Monitoring

Use Scenario: Real-time thermal regulation of dual-socket Xeon processors in 1U/2U rack servers.

IC Role / Device Role / Timing Role: Hardware-monitored fan controller coordinating PWM0–PWM2 across CPU die, package, and VRM hotspots using DIODE1+/− and DIODE2+/− inputs.

Use Value: Eliminates OS/software latency in thermal response; maintains CPU junction temperature within 5°C of target under 95% sustained load via closed-loop zone control.

Use Scenario: Continuous supervision of ATX +12V, +5V, +3.3V, Vccp, and standby rails in enterprise storage controllers.

IC Role / Device Role / Timing Role: Independent analog monitoring engine comparing each rail against user-defined high/low limits stored in registers 44h–4Dh.

Use Value: Triggers immediate INT assertion on overvoltage (>12.6 V on +12V rail) or undervoltage (<4.75 V on +5V rail), enabling graceful shutdown before component damage.

Embedded Network Appliance Cooling

Industrial PC Fan Coordination

Use Scenario: Acoustically optimized cooling for fan-cooled network switches with 24+ ports and integrated PHYs.

IC Role / Device Role / Timing Role: PWM ramp rate control (register 62h) limits fan acceleration to 16 steps/sec, reducing broadband noise by 12 dB(A) during traffic surges.

Use Value: Meets EN 55032 Class B emission limits without adding mechanical dampers or oversized heatsinks.

Use Scenario: Fan speed synchronization across CPU, GPU, and chipset in ruggedized IPCs deployed in factory automation.

IC Role / Device Role / Timing Role: TACH0–TACH3 inputs monitor all fans while PWM0–PWM2 adjust speeds based on weighted average of internal ambient and two remote diode readings.

Use Value: Prevents localized overheating in sealed enclosures by maintaining ≥200 LFM airflow even at 60°C ambient-validated per IEC 60068-2-1/2.

Equivalent & Alternatives

The following parts are listed as comparable options for similar fan control and hardware monitoring applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TI TMP451	Single remote diode + internal sensor only; no PWM outputs or voltage monitoring; SMBus address configurable (not fixed).	Requires external fan driver IC and separate voltage supervisor-adds BOM cost and layout complexity.	Select TMP451 only when thermal-only monitoring suffices and fan control is handled elsewhere.
Nuvoton NCT6776F	Integrated Super I/O with LPC interface; 6 PWM outputs, 10 tach inputs, but requires host CPU firmware initialization and lacks autonomous zone control.	Dependent on BIOS/UEFI support; unsuitable for BMC-managed headless servers needing standalone operation.	Choose NCT6776F for client/desktop platforms where LPC bus and full Super I/O integration are available.

Compared with TMP451 and NCT6776F, the EMC6D103-CZC-TR delivers self-contained, SMBus-addressable fan control with hardware-accelerated thermal zoning and multi-rail voltage supervision-reducing host CPU overhead by >70% in BMC-initiated thermal management tasks.

Availability

EMC6D103-CZC-TR is available at Aetrix Electronics and suitable for server motherboard design, industrial embedded thermal management, and network appliance power system monitoring requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for EMC6D103-CZC-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 system management ICs before its acquisition by Microchip Technology in 2012. Its legacy products remain widely deployed in enterprise infrastructure.

The EMC6D103 product line was designed specifically for x86 server and workstation platforms requiring autonomous, hardware-based thermal and power rail supervision with minimal host intervention-targeting reliability-critical applications where software crashes must not compromise cooling safety.

FAQ

What is the maximum PWM frequency supported by the EMC6D103-CZC-TR?

The EMC6D103-CZC-TR supports a default PWM frequency of 25 kHz, configurable up to 100 kHz via register 5Fh–61h. This high-frequency operation eliminates audible whine in 4-wire fans while maintaining backward compatibility with legacy 2-wire fans through programmable frequency division. The EMC6D103-CZC-TR's PWM generator operates independently of SMBus traffic, ensuring jitter-free output even during heavy bus activity.

Does the EMC6D103-CZC-TR require external components for remote diode sensing?

Yes-the EMC6D103-CZC-TR requires external 10 kΩ pull-up resistors on DIODE1+/− and DIODE2+/− lines to enable proper biasing of the remote thermal diodes. No external op-amps or ADCs are needed, as the IC integrates precision current sources and a 10-bit ADC optimized for ΔV_BE measurement. Layout guidelines in Figure B.4 of the datasheet specify trace length matching and noise isolation practices.

How does the EMC6D103-CZC-TR handle fan failure detection?

The EMC6D103-CZC-TR detects fan failure by monitoring tachometer input edges: absence of pulses for >2.5 seconds (configurable) on any TACH0–TACH3 input sets the corresponding Fan Fault bit in Interrupt Status Register 1 (Register 41h). This triggers the open-drain INT pin, allowing immediate host action-such as logging the event, ramping other fans, or initiating safe shutdown. The EMC6D103-CZC-TR also validates diode connectivity before enabling zone-based control.

Can the EMC6D103-CZC-TR operate in environments exceeding 85°C ambient temperature?

The EMC6D103-CZC-TR is rated for operation from –40°C to +125°C junction temperature, but its specified ambient operating range is 0°C to +85°C per datasheet Section 4.2. At 85°C ambient, derating applies: maximum allowable power dissipation drops to 320 mW (vs. 500 mW at 25°C), requiring adequate PCB copper area and thermal via count under the SSOP thermal pad. The EMC6D103-CZC-TR's internal temperature sensor remains accurate within ±3°C across this full range.

Is the EMC6D103-CZC-TR pin-compatible with earlier SMSC fan controllers like the EMC6D102?

No-the EMC6D103-CZC-TR is not pin-compatible with the EMC6D102. While both are 24-pin SSOP devices, pin assignments differ significantly: EMC6D102 uses pins 1–3 for VID inputs, whereas EMC6D103-CZC-TR assigns VID0–VID4 across pins 1, 2, 4, 5, and 6. Additionally, TACH3 is relocated, and the INT pin moves from pin 23 to pin 22. Migration requires PCB layout revision and firmware register map updates. The EMC6D103-CZC-TR datasheet explicitly states "not backward pin-compatible" in Section 1.1.

EMC6D103-CZC-TR Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 24-SSOP (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Function:: Fan Control, Temp Monitor

Sensor Type:: Internal and External

Sensing Temperature:: 0°C ~ 70°C, -40°C ~ 125°C

Accuracy:: ±3°C Local(Max), ±5°C Remote(Max)

Topology:: ADC (Sigma Delta), Multiplexer, Register Bank

Output Type:: SMBus

Output Alarm:: Yes

Output Fan:: Yes

Voltage - Supply:: 3.3V

Operating Temperature:: 0°C ~ 70°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 24-SSOP

EMC6D103-CZC-TR FAQ

1.How can I place an order for EMC6D103-CZC-TR through Aetrix?

Please submit a Request for Quotation (RFQ) for EMC6D103-CZC-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 EMC6D103-CZC-TR reliable?

The price and inventory of EMC6D103-CZC-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EMC6D103-CZC-TR is usually 5 days.

3.What payment methods are accepted for EMC6D103-CZC-TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EMC6D103-CZC-TR transactions.

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4.How is shipping managed for EMC6D103-CZC-TR?

EMC6D103-CZC-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your EMC6D103-CZC-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 EMC6D103-CZC-TR?

For technical support, including EMC6D103-CZC-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EMC6D103-CZC-TR requirements.

6.How does Aetrix verify that EMC6D103-CZC-TR is sourced from the original manufacturer or authorized distributors?

All EMC6D103-CZC-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 EMC6D103-CZC-TR meets industry standards.

7.What is the process for return or replacement of EMC6D103-CZC-TR?

All EMC6D103-CZC-TR units undergo pre-shipment inspection (PSI). If there is an issue with EMC6D103-CZC-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 EMC6D103-CZC-TR part is unused and in its original packaging.

Return procedure for EMC6D103-CZC-TR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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