Datasheet

LM63
www.ti.com SNAS190E –SEPTEMBER 2002–REVISED MAY 2013
AC ELECTRICAL CHARACTERISTICS
The following specifications apply for V
DD
= 3.0 VDC to 3.6 VDC, and all analog source impedance R
S
= 50Ω unless
otherwise specified in the conditions. Boldface limits apply for T
A
= T
MIN
to T
MAX
; all other limits T
A
= +25°C.
UNITS
SYMBOL PARAMETER CONDITIONS TYPICAL
(1)
LIMITS
(2)
(LIMIT)
TACHOMETER ACCURACY
Fan Control Accuracy ±10 % (max)
Fan Full-Scale Count 65535 (max)
Fan Counter Clock Frequency 90 kHz
Fan Count Update Frequency 1.0 Hz
FAN PWM OUTPUT
Frequency Accuracy ±10 % (max)
(1) “Typicals” are at T
A
= 25°C and represent most likely parametric norm. They are to be used as general reference values not for critical
design calculations.
(2) Limits are specified to AOQL (Average Outgoing Quality Level).
DIGITAL ELECTRICAL CHARACTERISTICS
UNITS
SYMBOL PARAMETER CONDITIONS TYPICAL
(1)
LIMITS
(2)
(LIMIT)
V
IH
Logical High Input Voltage 2.1 V (min)
V
IL
Logical Low Input Voltage 0.8 V (max)
I
IH
Logical High Input Current V
IN
= V
DD
0.005 +10 µA (max)
I
IL
Logical Low Input Current V
IN
= GND −0.005 −10 µA (max)
C
IN
Digital Input Capacitance 20 pF
(1) “Typicals” are at T
A
= 25°C and represent most likely parametric norm. They are to be used as general reference values not for critical
design calculations.
(2) Limits are specified to AOQL (Average Outgoing Quality Level).
SMBus LOGICAL ELECTRICAL CHARACTERISTICS
The following specifications apply for V
DD
= 3.0 VDC to 3.6 VDC, and all analog source impedance R
S
= 50Ω unless
otherwise specified in the conditions. Boldface limits apply for T
A
= T
MIN
to T
MAX
; all other limits T
A
= +25°C.
UNITS
SYMBOL PARAMETER CONDITIONS TYPICAL
(1)
LIMITS
(2)
(LIMIT)
SMBDAT OPEN-DRAIN OUTPUT
V
OL
Logic Low Level Output Voltage I
OL
= 4 mA 0.4 V (max)
I
OH
High Level Output Current V
OUT
= V
DD
0.03 10 µA (max)
SMBDAT, SMBCLK INPUTS
V
IH
Logical High Input Voltage 2.1 V (min)
V
IL
Logical Low Input Voltage 0.8 V (max)
V
HYST
Logic Input Hysteresis Voltage 320 mV
(1) “Typicals” are at T
A
= 25°C and represent most likely parametric norm. They are to be used as general reference values not for critical
design calculations.
(2) Limits are specified to AOQL (Average Outgoing Quality Level).
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