SMBus Fan Control with 1°C Accurate Temperature Monitoring
Datasheet
Table 3.3 SMBus Electrical Specifications (continued)
VDD = 3.0V to 3.6V, TA = 0oC - 85oC, Typical values are at TA = 27°C unless otherwise noted
CHARACTERISTIC
SYMBOL
MIN
TYP
MAX
UNITS
CONDITIONS
Clock Low Period
Clock High Period
Clock/Data Fall time
Clock/Data Rise time
Capacitive Load
tLOW
1.3
0.6
us
us
ns
ns
pF
tHIGH
tFALL
tRISE
CLOAD
300
300
400
Min = 20+0.1CLOAD ns
Min = 20+0.1CLOAD ns (Note 3.1)
per bus line
Note 3.1 300ns rise time max is required for 400kHz bus operation. For lower clock frequencies the
maximum rise time is (0.1 / fSMB)+ 50ns.
3.4
EEPROM Loader Electrical Specifications (EMC2101-R only)
Table 3.4 EEPROM Loader Electrical Specifications
VDD = 3.0V to 3.6V, TA = 0oC - 85oC, Typical values are at TA = 27°C unless otherwise noted
CHARACTERISTIC
SYMBOL
MIN
TYP
MAX
UNITS
CONDITIONS
Interface
Input High Voltage
Input Low Voltage
Input High/Low Current
Hysteresis
VIH
2.1
-1
V
VIL
0.8
1
V
IIH / IIL
uA
mV
pF
mA
500
5
Input Capacitance
Output Low Sink Current
CIN
8
VOL = 0.4V
Timing
Loading Delay
tDLY
10
ms
Delay after power-up until EEPROM
loading begins. (See Section 4.9.)
Loading Time
tLOAD
fSMB
tSP
50
50
ms
kHz
ns
Clock Frequency
Spike Suppression
50
Bus free time Start to
Stop
tBUF
1.3
us
Hold Time: Start
Setup Time: Start
Setup Time: Stop
Data Hold Time
tHD:STA
tSU:STA
tSU:STO
tHD:DAT
0.6
0.6
0.6
0.3
us
us
us
us
Revision 2.53 (03-13-07)
SMSC EMC2101
DATA1S2HEET
SMSC [ SMSC CORPORATION ]
