12

FN8164.7

August 17, 2015

Equivalent AC Test Circuit

Circuit #3 SPICE Macro Model

Guidelines for Calculating

Typical Values of Bus Pull-Up Resistors

DCP Wiper Current De-rating Curve

5V

1533



100pF

SDA OUTPUT

15pF

25pF

15pF

MACRO MODEL

120

100

80

40

60

20

20

40

60

80

100

120

0

0

BUS CAPACITANCE (pF)

MIN.

RESISTANCE

MAXIMUM

RESISTANCE

=1.8k



7

6

5

3

4

1

20

40

60

70

80

90

0

0

AMBIENT TEMPERATURE (°C)

2

50

10

30

AC Electrical Specifications

(Over recommended operating conditions unless otherwise stated).

SYMBOL

PARAMETER

LIMITS

UNIT

REFERENCE

FIGURE

NUMBER(S)

MIN

(Note 11)

MAX

(Note 11)

SCL clock frequency

0

100

kHz

10

Clock LOW period

4700

ns

10

Clock HIGH period

4000

ns

10

SCL and SDA rise time

1000

ns

10

SCL and SDA fall time

300

ns

10

Noise suppression time constant (glitch filter)

20

ns

10

Start condition setup time (for a repeated start condition)

4000

ns

10 and 12

Start condition hold time

4000

ns

10 and 12

SCL

SDA

(DATA IN)

FIGURE 10. INPUT BUS TIMING

X9241A