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

Microchip Technology EMC2300-AZC-TR

Name: EMC2300-AZC-TR
Brand: Microchip Technology
SKU: EMC2300-AZC-TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: EMC2300-AZC-TR

Manufacturer:: Microchip Technology

Category:: Thermal Management

Package:: 16-SSOP (0.154", 3.90mm Width)

Datasheet:: EMC2300-AZC-TR.pdf

Description:: IC RPM FAN CTRLR 16SSOP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

EMC2300-AZC-TR from SMSC is a fan control IC with integrated temperature and voltage monitoring, operating at 3.3 V (5 V tolerant inputs), supporting three high-frequency PWM outputs, four fan tachometer inputs, and dual remote thermal diode sensing with ±3°C accuracy. It enables automatic fan speed regulation in server motherboard thermal management systems.

For engineers reviewing the EMC2300-AZC-TR datasheet, EMC2300-AZC-TR pinout, EMC2300-AZC-TR application, or EMC2300-AZC-TR equivalent, key selection considerations include SMBus 2.0 interface compatibility, programmable PWM ramp rate for acoustic noise reduction, zone-based fan control linking up to three thermal zones per PWM, and dual low-power monitoring modes (Sleep/Shutdown).

Technical Context

The EMC2300-AZC-TR implements an ACPI-compliant hardware monitor with dedicated analog front-end for VCC/VCCP voltage sensing and two remote diode inputs plus internal ambient sensor. Its fan control logic supports both host-software-driven and autonomous "zone mode" operation, where PWM duty cycle adjusts dynamically based on configurable temperature thresholds and hysteresis.

SMBus 2.0 interface provides fixed slave addressing (three options via ADDR pins), non-discoverable configuration, and interrupt-driven status reporting via active-low INT# pin. Monitoring cycles are configurable in continuous or 1-second cycling mode, with ADC conversion timing dependent on averaging settings (AVG[2:0] bits) and input channel selection.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	3.3 V nominal, with 5 V tolerant digital input buffers - enables direct interfacing to 5 V host logic without level shifters.
PWM Outputs	3 independent high-frequency PWM channels - supports modern 4-wire fans requiring >20 kHz drive, backward-compatible with lower-frequency fans.
Fan Tach Inputs	4 dedicated tachometer inputs - measures RPM from up to four DC fans using edge-counting with configurable minimum detectable RPM (e.g., 120 RPM at 3 edges).
Temperature Sensing	2 remote thermal diodes + 1 internal sensor, ±3°C accuracy - enables precise thermal zone tracking across CPU, GPU, and system ambient locations.
Voltage Monitoring	VCC and VCCP analog inputs with limit comparison - provides real-time power rail health monitoring for processor and core supply domains.
Interface	SMBus 2.0 compliant, fixed slave address (3 options), interrupt-capable - integrates into standard platform management controllers without enumeration overhead.
Power Modes	Continuous, Cycle, Sleep, and Shutdown modes - reduces quiescent current to <10 µA in Shutdown, enabling long-term thermal monitoring in low-power states.

Pinout & Package

EMC2300-AZC-TR is housed in a 16-pin SSOP (Shrink Small Outline Package), lead-free and RoHS compliant, with 0.65 mm pitch and JEDEC MO-153 standard outline.

Pin/Terminal	Circuit Role	Design Meaning
VCC	Primary power supply	3.3 V input powering internal logic and analog blocks; decoupling required within 10 mm.
GND	Ground reference	Analog and digital ground shared; recommended star-point connection near VCC decoupling.
SCL	SMBus clock input	Open-drain, 5 V tolerant; requires external pull-up to 3.3 V.
SDA	SMBus data I/O	Open-drain, 5 V tolerant; shares same pull-up as SCL.
INT#	Interrupt output	Active-low open-drain signal asserting on out-of-limit temp/voltage or fan stall detection.
ADDR0–ADDR2	Slave address select	Three binary inputs setting one of eight possible SMBus addresses (only three used per datasheet Table 5.1).
PWM1–PWM3	PWM fan drive outputs	Push-pull, 3.3 V logic-level outputs; each drives one fan with programmable frequency (21–100 kHz) and ramp rate.
TACH1–TACH4	Fan tachometer inputs	5 V tolerant, Schmitt-triggered inputs accepting 2- or 3-edge fan pulses for RPM calculation.
DIODE1+, DIODE1−	Remote thermal diode 1	Differential input for external CPU/GPU diode; supports series resistance compensation.
DIODE2+, DIODE2−	Remote thermal diode 2	Second differential diode input for additional thermal zone (e.g., VRM or chipset).
VCCP	Processor voltage sense	Analog input for monitoring core voltage; connects directly to VCCP rail via RC filter per datasheet Figure B.5.
NC	No connect	Pins 15 and 16 are unconnected; must remain floating per datasheet mechanical spec.

Key Features

Feature	Design Value
Programmable PWM ramp rate	Adjusts fan speed transition time (1–255 steps) to suppress acoustic noise during thermal transients.
Zone-based fan control	One PWM output can be linked to up to three independent thermal zones, enabling coordinated cooling across subsystems.
Autonomous "zone mode" operation	Hardware executes closed-loop fan control without CPU intervention - reduces host software overhead and improves response latency.
Diode fault detection	Monitors open/short conditions on remote diode inputs and reports via interrupt and status register (bit 7 of INT Status Reg 1).
Configurable monitoring cycle	Switches between continuous sampling (for dynamic thermal environments) and 1-second cycling (for power-constrained platforms).

Applications

Server Motherboard Thermal Management	Embedded Industrial Controller Cooling
Use Scenario: Real-time thermal regulation across CPU, memory, and PCIe expansion slots in 1U/2U rack servers. IC Role / Device Role / Timing Role: Fan control IC managing up to four cooling fans via three PWM outputs while monitoring six analog inputs (VCC, VCCP, two diodes, ambient). Use Value: Enables ACPI-compliant thermal throttling with sub-3°C temperature accuracy and hardware-accelerated fan response, reducing firmware complexity and improving reliability.	Use Scenario: Fan speed adaptation in sealed industrial PLC enclosures exposed to wide ambient temperature swings (-40°C to +85°C). IC Role / Device Role / Timing Role: Autonomous thermal supervisor using Sleep/Shutdown low-power modes to maintain monitoring during standby while minimizing system current draw. Use Value: Eliminates need for host CPU polling; achieves <10 µA shutdown current and maintains valid temperature limits across full industrial temperature range.
Network Switch ASIC Thermal Control	High-Density Storage Enclosure Fan Regulation
Use Scenario: Coordinated cooling of multi-die switch ASICs with localized hot spots requiring independent thermal zone tracking. IC Role / Device Role / Timing Role: Dual remote diode interface monitors two ASIC die temperatures; PWM1–PWM3 drive dedicated blowers per thermal region. Use Value: Supports per-zone PWM assignment and ramp rate tuning to prevent airflow turbulence and acoustic resonance in compact chassis.	Use Scenario: Dynamic fan speed control across 12+ HDD bays in JBOD enclosures, balancing cooling performance against acoustic noise limits. IC Role / Device Role / Timing Role: Four tachometer inputs verify rotational integrity of redundant fans; zone-linked PWMs adjust speed based on aggregate bay temperature profiles. Use Value: Detects fan stall via tach timeout and triggers failover to backup fans without host intervention, improving storage system MTBF.

Server Motherboard Thermal Management

Embedded Industrial Controller Cooling

Use Scenario: Real-time thermal regulation across CPU, memory, and PCIe expansion slots in 1U/2U rack servers.

IC Role / Device Role / Timing Role: Fan control IC managing up to four cooling fans via three PWM outputs while monitoring six analog inputs (VCC, VCCP, two diodes, ambient).

Use Value: Enables ACPI-compliant thermal throttling with sub-3°C temperature accuracy and hardware-accelerated fan response, reducing firmware complexity and improving reliability.

Use Scenario: Fan speed adaptation in sealed industrial PLC enclosures exposed to wide ambient temperature swings (-40°C to +85°C).

IC Role / Device Role / Timing Role: Autonomous thermal supervisor using Sleep/Shutdown low-power modes to maintain monitoring during standby while minimizing system current draw.

Use Value: Eliminates need for host CPU polling; achieves <10 µA shutdown current and maintains valid temperature limits across full industrial temperature range.

Network Switch ASIC Thermal Control

High-Density Storage Enclosure Fan Regulation

Use Scenario: Coordinated cooling of multi-die switch ASICs with localized hot spots requiring independent thermal zone tracking.

IC Role / Device Role / Timing Role: Dual remote diode interface monitors two ASIC die temperatures; PWM1–PWM3 drive dedicated blowers per thermal region.

Use Value: Supports per-zone PWM assignment and ramp rate tuning to prevent airflow turbulence and acoustic resonance in compact chassis.

Use Scenario: Dynamic fan speed control across 12+ HDD bays in JBOD enclosures, balancing cooling performance against acoustic noise limits.

IC Role / Device Role / Timing Role: Four tachometer inputs verify rotational integrity of redundant fans; zone-linked PWMs adjust speed based on aggregate bay temperature profiles.

Use Value: Detects fan stall via tach timeout and triggers failover to backup fans without host intervention, improving storage system MTBF.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
EMC2301-AZC-TR	Same pinout and register map; adds XOR tree test mode and enhanced diode calibration algorithm.	Identical thermal/voltage monitoring and fan control functionality; improved accuracy in high-noise industrial environments.	Select EMC2301-AZC-TR when higher diode measurement stability under EMI is required; otherwise EMC2300-AZC-TR remains optimal for cost-sensitive server designs.
ADM1032ARQZ-REEL	Single-zone thermal monitor with dual diode inputs but no PWM outputs; SMBus interface only, no fan control logic.	Lacks all fan tach/PWM capability - requires external fan controller or host software coordination.	Choose ADM1032ARQZ-REEL only if fan control is handled elsewhere; EMC2300-AZC-TR provides integrated hardware fan management unavailable in ADM1032.

Compared with EMC2301-AZC-TR, the EMC2300-AZC-TR offers identical core fan control and monitoring but omits advanced diagnostics; versus ADM1032ARQZ-REEL, it delivers full autonomous fan regulation - eliminating host CPU dependency and reducing BOM count by integrating PWM drivers and tach processing.

Availability

EMC2300-AZC-TR is available at Aetrix Electronics and suitable for server motherboard thermal management, embedded industrial controller cooling, network switch ASIC thermal control, and high-density storage enclosure fan regulation requiring stable component supply and long-lifecycle support.

Supply support for EMC2300-AZC-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.

The EMC2300-AZC-TR belongs to SMSC's environmental monitoring and fan control product line, designed specifically for ACPI-compliant thermal management in x86 server and embedded platforms requiring autonomous, hardware-based cooling regulation.

FAQ

What is the maximum PWM frequency supported by the EMC2300-AZC-TR?

The EMC2300-AZC-TR supports programmable PWM frequencies from 21 kHz to 100 kHz, selectable via registers 5Fh–61h. This high-frequency range ensures compatibility with modern 4-wire fans that require >20 kHz drive to eliminate audible coil whine, while maintaining backward compatibility with legacy fans operating at lower frequencies. The EMC2300-AZC-TR's PWM generator is fully hardware-controlled and does not rely on host CPU timing.

Does the EMC2300-AZC-TR support automatic fan control without host CPU intervention?

Yes, the EMC2300-AZC-TR supports autonomous "zone mode" operation where its internal logic continuously monitors temperature and fan speed, then adjusts PWM duty cycle in real time based on user-configured high/low limits and hysteresis. This eliminates the need for constant host polling and enables faster thermal response - a key feature confirmed in Chapter 7.1.4 and Figure 7.2 of the EMC2300-AZC-TR datasheet.

How many thermal zones can the EMC2300-AZC-TR monitor simultaneously?

The EMC2300-AZC-TR monitors three thermal zones: two external zones via dedicated DIODE1+/− and DIODE2+/− inputs (±3°C accuracy), and one internal zone using its on-die ambient temperature sensor. Each PWM output can be assigned to any combination of these zones, allowing flexible cooling strategies - for example, PWM1 linked to CPU diode + ambient, PWM2 to GPU diode only, as defined in registers 5Fh–61h and Table 8.23.

What voltage rails does the EMC2300-AZC-TR monitor, and what is its accuracy?

The EMC2300-AZC-TR monitors VCC (core logic supply) and VCCP (processor core voltage) using dedicated analog inputs. Voltage measurement resolution is 8-bit (0–255), with accuracy specified as ±1.5% of full-scale reading per Table 8.3 and Table A.1. Limit comparison is performed in hardware, and out-of-range conditions trigger the INT# pin and corresponding status bits in registers 41h/42h.

Is the EMC2300-AZC-TR compatible with SMBus 2.0, and how are slave addresses configured?

Yes, the EMC2300-AZC-TR is SMBus 2.0 compliant with fixed, non-discoverable addressing. Slave address is set using three hardware pins (ADDR0–ADDR2), selecting from three predefined options: 0x2E, 0x2F, or 0x4C - as defined in Table 5.1 and Figure 5.1 of the EMC2300-AZC-TR datasheet. No software enumeration is required, simplifying integration into existing platform management firmware.

EMC2300-AZC-TR Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 16-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, Multiplexer, Register Bank, Tachometer

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:: 16-SSOP

EMC2300-AZC-TR FAQ

1.How can I place an order for EMC2300-AZC-TR through Aetrix?

Please submit a Request for Quotation (RFQ) for EMC2300-AZC-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 EMC2300-AZC-TR reliable?

The price and inventory of EMC2300-AZC-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EMC2300-AZC-TR is usually 5 days.

3.What payment methods are accepted for EMC2300-AZC-TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EMC2300-AZC-TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for EMC2300-AZC-TR?

EMC2300-AZC-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your EMC2300-AZC-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 EMC2300-AZC-TR?

For technical support, including EMC2300-AZC-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EMC2300-AZC-TR requirements.

6.How does Aetrix verify that EMC2300-AZC-TR is sourced from the original manufacturer or authorized distributors?

All EMC2300-AZC-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 EMC2300-AZC-TR meets industry standards.

7.What is the process for return or replacement of EMC2300-AZC-TR?

All EMC2300-AZC-TR units undergo pre-shipment inspection (PSI). If there is an issue with EMC2300-AZC-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 EMC2300-AZC-TR part is unused and in its original packaging.

Return procedure for EMC2300-AZC-TR:

1.Submit a request within 90 days.

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

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