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© Andigilog, Inc. 2006
www.andigilog.com
October 2006 - 70A06010
aSC7621
Parameter
Conditions
Min
Typ
Max
Units
Logic Input Low Voltage
VIL
0.8
V (max)
Logic Input Threshold Voltage
VTH
1.5
V
Logic High Input Current
IIH
VIN = V+
0.005
10
µA(max)
Logic Low Input Current
IIL
VIN = GND
-0.005
-10
µA(max)
Digital Input Capacitance
CIN
20
pF
AC Electrical Characteristics
The following specifications apply for VDD = 3.0V to 3.6V unless otherwise specified in conditions. Boldface limits apply for
TA = TJ over TMIN to TMAX; all other limits TA = TJ = 25°C.
Parameter
Conditions
Min
Typ
Max
Units
TACHOMETER
Fan Full-Scale Count
65535
(max)
Fan Counter Clock Frequency
90
kHz
Fan Count Conversion Time
0.3
1.0
sec(max)
FAN PWM OUTPUT
Low-Frequency Range
10
94
Hz
Hz
Frequency Range
High-Frequency Range
23
30
kHz
kHz
Duty-Cycle Range
0 to
100
%(max)
Duty-Cycle Resolution (8-bits)
0.3906
%/count
Spin-Up Time Interval Range
0
4000
ms
ms
Logic Electrical Characteristics
(TA = 25 °C, VDD = 3.3V unless otherwise noted)
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Input Voltage Logic High
VIH
3V
≤VDD≤3.6V
2.1
V
Input Voltage Logic Low
VIL
3V
≤VDD≤3.6V
0.8
V
Input Leakage Current
IIN
VIN = 0V or 5.5V,
0°C
≤TA≤+125°C
±1.0
µA
SMBus Output Sink Current
IOL
TA = 25 °C, VOL = 0.6V
6
mA
SMBus Logic Input Current
IIH, IIL
-1
+1
µA
Output Leakage Current
IOH
VOH = VDD = 5.5V
0.1
1
µA
Output Transition Time
tF
CL= 400pF, IOL = -3mA
250
ns
Input Capacitance
CIN
All Digital Inputs
5
pF
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