PCA9540BGD NXP [NXP Semiconductors], PCA9540BGD Datasheet - Page 12

• Manufacturer Part Number: PCA9540BGD
• Description: 2-channel I2C-bus multiplexer
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
11. Dynamic characteristics
Table 7.
[1]
[2]
[3]
[4]
[5]
PCA9540B_4
Product data sheet
Symbol
t
f
t
t
t
t
t
t
t
t
t
t
C
t
t
t
PD
SCL
BUF
HD;STA
LOW
HIGH
SU;STA
SU;STO
HD;DAT
SU;DAT
r
f
SP
VD;DAT
VD;ACK
b
Pass gate propagation delay is calculated from the 20
After this period, the first clock pulse is generated.
A device must internally provide a hold time of at least 300 ns for the SDA signal (referred to the V
bridge the undefined region of the falling edge of SCL.
C
Measurements taken with 1 k pull-up resistor and 50 pF load.
b
= total capacitance of one bus line in pF.
Dynamic characteristics
Parameter
propagation delay
SCL clock frequency
bus free time between a STOP and
START condition
hold time (repeated) START
condition
LOW period of the SCL clock
HIGH period of the SCL clock
set-up time for a repeated START
condition
set-up time for STOP condition
data hold time
data set-up time
rise time of both SDA and SCL
signals
fall time of both SDA and SCL
signals
capacitive load for each bus line
pulse width of spikes that must be
suppressed by the input filter
data valid time
data valid acknowledge time
Rev. 04 — 3 September 2009
Conditions
from SDA to SDx,
or SCL to SCx
HIGH-to-LOW
LOW-to-HIGH
typical R
on
and the 15 pF load capacitance.
[2]
[5]
[5]
Standard-mode
Min
250
4.7
4.0
4.7
4.0
4.7
4.0
0
0
-
[3]
-
-
-
-
-
-
-
I
2
C-bus
0.3
1000
Max
3.45
100
300
400
0.6
50
1
1
2-channel I
-
-
-
-
-
-
-
[1]
IH(min)
20 + 0.1C
20 + 0.1C
Fast-mode I
of the SCL signal) in order to
PCA9540B
Min
100
1.3
0.6
1.3
0.6
0.6
0.6
0
0
-
-
-
-
-
-
[3]
2
C-bus multiplexer
© NXP B.V. 2009. All rights reserved.
b
b
[4]
[4]
2
C-bus
0.3
Max
400
300
300
400
0.9
0.6
50
1
1
-
-
-
-
-
-
-
[1]
12 of 22
Unit
ns
kHz
ns
ns
ns
pF
ns
s
s
s
s
s
s
s
s
s
s