Rainbow Electronics LM80 - Manual (Page 5)

DC Electrical Characteristics
(Continued)
The following specifications apply for +2.8 V
DC
≤
V + ≤
+3.8 V
DC
for LM80CIMT-3, +4.25 V
DC
≤
V + ≤
+5.75 V
DC
for LM80CIMT-5,
IN0-IN6 R
S
= 25
Ω
, unless otherwise specified. Boldface limits apply for T
A
= T
J
= T
MIN
to T
MAX
; all other limits T
A
= T
J
=
25˚C.(Note 7)
Symbol Parameter Conditions Typical Limits Units
(Note 8) (Note 9) (Limits)
FAN RPM-to-DIGITAL CONVERTER
Fan RPM Error +25˚C ≤ T
A
≤ +75˚C ± 10 % (max)
−10˚C
≤
T
A
≤
+100˚C ± 15 % (max)
−25˚C
≤
T
A
≤
+125˚C ± 20 % (max)
Full-scale Count 255 (max)
FAN1 and FAN2 Nominal Input
RPM (See
Section 6.0)
Divisor = 1, Fan Count = 153
(Note 12) 8800 RPM
Divisor = 2, Fan Count = 153
(Note 12) 4400 RPM
Divisor = 3, Fan Count = 153
(Note 12) 2200 RPM
Divisor = 4, Fan Count = 153
(Note 12) 1100 RPM
Internal Clock Frequency +25˚C
≤
T
A
≤
+75˚C 22.5 20.2 kHz (min)
24.8 kHz (max)
−10˚C
≤
T
A
≤
+100˚C 22.5 19.1 kHz (min)
25.9 kHz (max)
−25˚C ≤ T
A
≤ +125˚C 22.5
18 kHz (min)
27 kHz (max)
DIGITAL OUTPUTS: A0/NTEST_OUT, INT
V
OUT(1)
Logical “1” Output Voltage I
OUT
= +5.0 mA at
V + = +4.25V, I
OUT
= +3.0 mA
at V + = +2.8V
2.4 V (min)
V
OUT(0)
Logical “0” Output Voltage I
OUT
= −5.0 mA at
V + = +5.75V, I
OUT
= −3.0 mA
at V + = +3.8V
0.4 V (max)
OPEN DRAIN OUTPUTS: GPO, RST_OUT/OS, CI
V
OUT(0)
Logical “0” Output Voltage I
OUT
=− 5.0 mA
at V + = +5.75V,
I
OUT
= −3.0 mA at V + = +3.8V
0.4 V (min)
I
OH
High Level Output Current V
OUT
= V + 0.1 100 µA (max)
RST_OUT/OS, CI 30 10 ms (min)
Pulse Width
OPEN DRAIN SERIAL BUS OUTPUT: SDA
V
OUT(0)
Logical “0” Output Voltage I
OUT
= −3.0 mA at
V
+
= +5.75V, I
OUT
= −3.0 mA
at V + = +3.8V
0.4 V (min)
I
OH
High Level Output Current V
OUT
= V + 0.1 100 µA (max)
DIGITAL INPUTS: A0/NTEST_Out, A1-A2, BTI, CI (Chassis Intrusion), INT_IN, and NTEST_IN/Reset_IN
V
IN(1)
Logical “1” Input Voltage 2.0 V (min)
V
IN(0)
Logical “0” Input Voltage 0.8 V (max)
SERIAL BUS INPUTS (SCL, SDA) and FAN TACH PULSE INPUTS (FAN1, FAN2)
V
IN(1)
Logical “1” Input Voltage 0.7 x V + V (min)
V
IN(0)
Logical “0” Input Voltage 0.3 x V + V (max)
ALL DIGITAL INPUTS Except for BTI
I
IN(1)
Logical “1” Input Current V
IN
= V + −0.005 −1 µA (min)
I
IN(0)
Logical “0” Input Current V
IN
= 0 V
DC
0.005 1 µA (max)
C
IN
Digital Input Capacitance 20 pF
LM80
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