RPM-Based Fan Controller with HW Thermal Shutdown
Datasheet
Table 3.2 Electrical Specifications (continued)
VDD = 3V to 3.6V, T
A
= -40°C to 125°C, all Typical values at T
A
= 27°C unless otherwise noted.
CHARACTERISTIC
Temperature Decode
Accuracy
SYMBOL
T
TRIP
MIN
TYP
MAX
0.5
1
2
UNIT
°C
°C
CONDITIONS
1% external resistor
5% external resistor
RPM Based Fan Controller
Tachometer Range
Tachometer Setting
Accuracy
TACH
480
±2.5
16000
±5
RPM
%
Δ
TACH
Digital I/O pins
Input High Voltage
Input Low Voltage
Output High Voltage
Output Low Voltage
Leakage Current
V
IH
V
IL
V
OH
V
OL
I
LEAK
VDD -
0.4
0.4
±5
2.0
0.8
V
V
V
V
uA
8 mA current drive
8 mA current sink
ALERT and SYS_SHDN pins
Device powered or unpowered
T
A
< 85°C
3.2
SMBus Electrical Specifications (Client Mode)
Table 3.3 SMBus Electrical Specifications
VDD= 3V to 3.6V, T
A
= -40°C to 125°C Typical values are at T
A
= 27°C unless otherwise noted.
CHARACTERISTIC
SYMBOL
MIN
TYP
MAX
UNITS
CONDITIONS
SMBus Interface
Input High/Low Current
Input Capacitance
I
IH /
I
IL
C
IN
4
±5
10
uA
pF
Device powered or unpowered
T
A
< 85°C
SMBus Timing
Clock Frequency
Spike Suppression
Bus free time Start to
Stop
Setup Time: Start
Setup Time: Stop
Data Hold Time
Data Setup Time
f
SMB
t
SP
t
BUF
t
SU:STA
t
SU:STP
t
HD:DAT
t
SU:DAT
1.3
0.6
0.6
0.6
0.6
6
72
10
400
50
kHz
ns
us
us
us
us
us
SMSC EMC2103
15
Revision 0.85 (01-29-08)
DATASHEET
SMSC [ SMSC CORPORATION ]
