EMC2104 datasheet(16/101 Pages) SMSC

16 / 101 page

Dual RPM-Based PWM Fan Controller with Hardware Thermal Shutdown

Datasheet

Revision 1.74 (05-08-08)

SMSC EMC2104

DATASHEET

3.2

SMBus Electrical Specifications (client mode)

Output High Voltage

VOH

VDD -

0.4

4 mA current drive

Output Low Voltage

VOL

0.4

4 mA current sink

Leakage current

ILEAK

±5

ALERT and SYS_SHDN pins

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Table 3.3 SMBus Electrical Specifications

VDD= 3V to 3.6V, TA = -40°C to 85°C Typical values are at TA = 27°C unless otherwise noted.

CHARACTERISTIC

SYMBOL

MIN

TYP

MAX

UNITS

CONDITIONS

SMBus Interface

Input High Voltage

VIH

2.0

Input Low Voltage

VIL

0.8

Output High Voltage

VOH

VDD

- 0.4

Output Low Voltage

VOL

0.4

4 mA current sink

Input High/Low Current

IIH / IIL

±5

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Input Capacitance

CIN

5pF

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

Data Hold Time

tHD:DAT

0.6

Data Setup Time

tSU:DAT

0.6

Table 3.2 Electrical Specifications (continued)

VDD = 3V to 3.6V, VDD_5V = 4.5V to 5.5V, TA = -40°C to 85°C, all Typical values at TA = 27°C unless otherwise

noted.

CHARACTERISTIC

SYMBOL

MIN

TYP

MAX

UNIT

CONDITIONS

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