Rainbow-electronics LM92 Manual de usuario descargar pdf (Pagina 4)

Electrical Characteristics

DIGITAL DC CHARACTERISTICSUnless otherwise noted, these specifications apply for +V

=+2.7V to +5.5V for LM92CIM .

Boldface limits apply for T

MIN

to T

MAX

; all other limits T

=+25 ˚C, unless otherwise noted.

Symbol Parameter Conditions

Typical

(Note 7)

Limits

(Note 8)

Units

(Limit)

IN(1)

SDA and SCL Logical “1” Input

Voltage

x 0.7 V (min)

+0.3 V (max)

IN(0)

SDA and SCL Logical “0” Input

Voltage

−0.3 V (min)

x 0.3 V (max)

IN(HYST)

SDA and SCL Digital Input

Hysteresis

500 250 mV (min)

IN(1)

A0 and A1 Logical “1” Input

Voltage

2.0 V (min)

+0.3 V (max)

IN(0)

A0 and A1 Logical “0” Input

Voltage

−0.3 V (min)

0.7 V (max)

IN(1)

Logical “1” Input Current V

=+V

0.005 1.0 µA (max)

IN(0)

Logical “0” Input Current V

= 0 V −0.005 −1.0 µA (max)

Capacitance of All Digital Inputs 20 pF

High Level Output Current V

=+V

10 µA (max)

Low Level Output Voltage I

=3mA 0.4 V (max)

T_CRIT_A Output Saturation

Voltage

OUT

= 4.0 mA

(Note 14)

0.8 V (max)

T_CRIT_A Delay 1 Conversions

(max)

Output Fall Time C

= 400 pF 250 ns (max)

=3mA

SERIAL BUS DIGITAL SWITCHING CHARACTERISTICS Unless otherwise noted, these specifications apply for +V

=+2.7V

to +5.5V for LM92CIM . Boldface limits apply for T

MIN

to T

MAX

; all other limits T

=+25 ˚C, unless otherwise

noted. CL (load capacitance) on output lines = 80 pF unless otherwise specified. Boldface limits apply for T

MIN

MAX

; all other limits T

= +25 ˚C, unless otherwise noted.

The switching characteristics of the LM92 fully meet or exceed the published specifications of the I

C bus. The following pa-

rameters are the timing relationship between SCL and SDA signal related to the LM92. They are not the I

C bus specifica-

tions.

Symbol Parameter Conditions

Typical

(Note 7)

Limits

(Note 8)

Units

(Limit)

SCL (Clock) Period 2.5 µs(min)

1 ms(max)

Data in Set-Up Time to SCL High 100 ns(min)

Data Out Stable after SCL Low 0 ns(min)

SDA Low Set-Up Time to SCL Low (Start Condition) 100 ns(min)

SDA High Hold Time after SCL High (Stop Condition) 100 ns(min)

TIMEOUT

SDA and SCL Time Low for Reset of Serial Interface

(Note 17)

300

ms (min)

(max)

LM92

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Rainbow-electronics LM92 Manual de usuario Pagina 4

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