pca9549bs NXP Semiconductors, pca9549bs Datasheet - Page 13

• Manufacturer Part Number: pca9549bs
• Description: Octal Bus Switch With Individually I2c-bus Controlled Enables
• Manufacturer: NXP Semiconductors

Philips Semiconductors
10. Dynamic characteristics
Table 8.
[1]
[2]
[3]
[4]
PCA9549_1
Product data sheet
Symbol
t
f
t
t
t
t
t
t
t
t
t
t
C
t
t
t
RESET
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
w(rst)L
rst
REC;STA
b
Pass gate propagation delay is calculated from the 6
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
b
= total capacitance of one bus line in pF.
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
LOW-level reset time
reset time
recovery time to START condition
Dynamic characteristics
Conditions
A to B;
V
HIGH-to-LOW
LOW-to-HIGH
SDA clear
Rev. 01 — 11 July 2006
Octal bus switch with individually I
DD
typical R
= 4.5 V to 5.5 V
on
and the 50 pF load capacitance.
[2]
-
0
4.7
4.0
4.7
4.0
4.7
4.0
0
250
-
-
-
-
-
-
-
4
500
0
Standard-mode
[3]
Min
I
2
C-bus
0.25
100
-
-
-
-
-
-
3.45
-
1000
300
400
50
1
0.6
1
-
-
-
Max
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
[1]
IH(min)
2
C-bus controlled enables
-
0
1.3
0.6
1.3
0.6
0.6
0.6
0
100
20 + 0.1C
20 + 0.1C
-
-
-
-
-
4
500
0
Fast-mode I
[3]
of the SCL signal) in order to
Min
PCA9549
b
b
[4]
[4]
2
C-bus Unit
0.25
400
-
-
-
-
-
-
0.9
-
300
300
400
50
1
0.6
1
-
-
-
Max
[1]
13 of 24
ns
kHz
ns
ns
ns
ns
ns
ns
s
s
s
s
s
s
s
s
s
s
s
s