DIGITAL DC CHARACTERISTICS Unless otherwise noted, these specifications apply for V

LM74CIBP -3, V

for T

Symbol

Parameter

Conditions

Typical

(Note 7)

Limits

(Note 8)

Units

(Limit)

I

IN(0)

Logical “0” Input Current

V

−0.005

−3.0

µA (min)

C

IN

All Digital Inputs

20

pF

V

OH

High Level Output Voltage

I

2.4

V (min)

V

OL

Low Level Output Voltage

I

0.4

V (max)

I

O_TRI-STATE

TRI-STATE Output Leakage

Current

V

V

+

−1

+1

µA (min)

µA

(max)

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

to 3.6V for the LM74CIBP -3, V

capacitance) on output lines = 100 pF unless otherwise specified. Boldface limits apply for T

limits T

Symbol

Parameter

Conditions

Typical

(Note 7)

Limits

(Note 8)

Units

(Limit)

t

1

SC (Clock) Period

0.16

DC

µs (min)

(max)

t

2

CS Low to SC (Clock) High Set-Up Time

100

ns (min)

t

3

CS Low to Data Out (SO) Delay

70

ns (max)

t

4

SC (Clock) Low to Data Out (SO) Delay

100

ns (max)

t

5

CS High to Data Out (SO) TRI-STATE

200

ns (max)

t

6

SC (Clock) High to Data In (SI) Hold Time

50

ns (min)

t

7

Data In (SI) Set-Up Time to SC (Clock) High

30

ns (min)

10090904

FIGURE 2. Data Output Timing Diagram

www.national.com

5