EMC2103 datasheet(15/85 Pages) MICROCHIP

15 / 85 page

RPM-Based Fan Controller with Hardware Thermal Shutdown

Datasheet

 2013 Microchip Technology Inc.

DS0005250A-page 15

3.2

SMBus Electrical Specifications (Client Mode)

TRIP_SET Measurement

Voltage Accuracy

VTRIP

0.5

Temperature Decode

Accuracy

TTRIP

0.5

°C

1% external resistor

°C

5% external resistor

RPM Based Fan Controller

Tachometer Range

TACH

480

16000

RPM

Tachometer Setting

Accuracy



TACH

±2.5

±5

Digital I/O pins

Input High Voltage

VIH

2.0

Input Low Voltage

VIL

0.8

Output High Voltage

VOH

VDD -

0.4

8 mA current drive

Output Low Voltage

VOL

0.4

8 mA current sink

Leakage Current

ILEAK

±5

ALERT and SYS_SHDN pins

Device powered or unpowered

TA < 85°C

pull-up voltage < 3.6V

Table 3.3 SMBus Electrical Specifications

VDD= 3V to 3.6V, TA = -40°C to 125°C Typical values are at TA = 27°C unless otherwise noted.

CHARACTERISTIC

SYMBOL

MIN

TYP

MAX

UNITS

CONDITIONS

SMBus Interface

Input High/Low Current

IIH / IIL

±5

Device powered or unpowered

TA < 85°C

Input Capacitance

CIN

410

SMBus Timing

Clock Frequency

fSMB

400

kHz

Spike Suppression

tSP

Bus free time Start to

Stop

tBUF

1.3

Setup Time: Start

tSU:STA

0.6

Setup Time: Stop

tSU:STP

0.6

Table 3.2 Electrical Specifications (continued)

VDD = 3V to 3.6V, TA = -40°C to 125°C, all Typical values at TA = 27°C unless otherwise noted.

CHARACTERISTIC

SYMBOL

MIN

TYP

MAX

UNIT

CONDITIONS

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