Electrical characteristics, Lm92 – Rainbow Electronics LM92 User Manual
Page 4
Electrical Characteristics
DIGITAL DC CHARACTERISTICSUnless otherwise noted, these specifications apply for +V
S
=+2.7V to +5.5V for LM92CIM .
Boldface limits apply for T
A
= T
J
= T
MIN
to T
MAX
; all other limits T
A
= T
J
=+25 ˚C, unless otherwise noted.
Symbol
Parameter
Conditions
Typical
(Note 7)
Limits
(Note 8)
Units
(Limit)
V
IN(1)
SDA and SCL Logical “1” Input
Voltage
+V
S
x 0.7
V (min)
+V
S
+0.3
V (max)
V
IN(0)
SDA and SCL Logical “0” Input
Voltage
−0.3
V (min)
+V
S
x 0.3
V (max)
V
IN(HYST)
SDA and SCL Digital Input
Hysteresis
500
250
mV (min)
V
IN(1)
A0 and A1 Logical “1” Input
Voltage
2.0
V (min)
+V
S
+0.3
V (max)
V
IN(0)
A0 and A1 Logical “0” Input
Voltage
−0.3
V (min)
0.7
V (max)
I
IN(1)
Logical “1” Input Current
V
IN
= + V
S
0.005
1.0
µA (max)
I
IN(0)
Logical “0” Input Current
V
IN
= 0 V
−0.005
−1.0
µA (max)
C
IN
Capacitance of All Digital Inputs
20
pF
I
OH
High Level Output Current
V
OH
= + V
S
10
µA (max)
V
OL
Low Level Output Voltage
I
OL
= 3 mA
0.4
V (max)
T_CRIT_A Output Saturation
Voltage
I
OUT
= 4.0 mA
(Note 14)
0.8
V (max)
T_CRIT_A Delay
1
Conversions
(max)
t
OF
Output Fall Time
C
L
= 400 pF
250
ns (max)
I
O
= 3 mA
SERIAL BUS DIGITAL SWITCHING CHARACTERISTICS Unless otherwise noted, these specifications apply for +V
S
=+2.7V
to +5.5V for LM92CIM . Boldface limits apply for T
A
= T
J
= T
MIN
to T
MAX
; all other limits T
A
= T
J
=+25 ˚C, unless otherwise
noted. CL (load capacitance) on output lines = 80 pF 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, unless otherwise noted.
The switching characteristics of the LM92 fully meet or exceed the published specifications of the I
2
C bus. The following pa-
rameters are the timing relationship between SCL and SDA signal related to the LM92. They are not the I
2
C bus specifica-
tions.
Symbol
Parameter
Conditions
Typical
(Note 7)
Limits
(Note 8)
Units
(Limit)
t
1
SCL (Clock) Period
2.5
µs(min)
1
ms(max)
t
2
Data in Set-Up Time to SCL High
100
ns(min)
t
3
Data Out Stable after SCL Low
0
ns(min)
t
4
SDA Low Set-Up Time to SCL Low (Start Condition)
100
ns(min)
t
5
SDA High Hold Time after SCL High (Stop Condition)
100
ns(min)
t
TIMEOUT
SDA and SCL Time Low for Reset of Serial Interface
(Note 17)
75
300
ms (min)
ms
(max)
LM92
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