pca9518d NXP Semiconductors, pca9518d Datasheet - Page 8

• Manufacturer Part Number: pca9518d
• Description: Expandable 5-channel I2c Hub
• Manufacturer: NXP Semiconductors

1. The SDA and SCL propagation delays are dominated by rise times or fall times. The fall times are mostly internally controlled and are only
2. The SDA HIGH to LOW propagation delay, t
3. The SDA or SCL LOW to HIGH propagation delay includes the rise time constant from the quiescent LOW to 0.5 V
Philips Semiconductors
AC ELECTRICAL CHARACTERISTICS
NOTES:
AC WAVEFORMS
2004 Sep 29
t
t
t
t
t
t
t
t
t
SYMBOL
SYMBOL
OR SCL
PHLs
PLHs
PHLE1s
PLHE1s
PLHE2s
THLs
TLHs
SET
HOLD
EXPSDA1
EXPSDA2
OUTPUT
EXPSCL1
EXPSCL2
Expandable 5-channel I
INPUT
OR SCL
sensitive to load capacitance. The rise times are RC time constant controlled and therefor a specific numerical value can only be given for
fixed RC time constants.
or SCL fall time from the quiescent HIGH (usually V
which make the fall time almost independent of load capacitance.
EXPSCL2, the rise time constant for the quiescent LOW to 0.5 V
quiescent external driven LOW to 0.7 V
external R and total C for the various nodes.
SDA
SDA
0.7 V
OR
OR
CC
t
PHLs
0.5 V
0.7 V
CC
Propagation delay
SDA to SDAn or SCL to SCLn
Propagation delay
SDA to SDAn or SCL to SCLn
Propagation delay
EXPSDA1 to SDA or EXPSCL1 to SCL
Propagation delay
EXPSDA1 to SDA or EXPSCL1 to SCL
Propagation delay
EXPSDA2 to SDA or EXPSCL2 to SCL
Transition time, SDA/SCL
Transition time, SDA/SCL
Enable to Start condition
Enable after Stop condition
0.52 V
CC
0.3 V
t
0.4 V
PHLs
t
THLs
CC
0.5 V
CC
Waveform 1.
0.3 V
EFFECTIVE
PARAMETER
PARAMETER
STRETCH
t
THLs
CC
0.4 V
0.5 V
0.3 V
0.5 V
CC
0.3 V
CC
CC
CC
2
CC
t
PLHE2s
for the SDA or SCL output. All of these rise times are RC time constants determined by the
C hub
t
PLHE1s
PLHs
1
, includes the fall time from V
t
0.7 V
TLHs
CC
0.7 V
CC
SW01089
) to below 0.3 V
t
t
PLHs
PLHs
Waveform 1; Note 2
Waveform 1; Note 3
Waveform 1
Waveform 1
Waveform 1
Waveform 1
Waveform 1
CC
TEST CONDITIONS
TEST CONDITIONS
CC
for the EXPSDA1 or EXPSCL1, and the rise time constant from the
8
CC
TEST CIRCUIT
. The SDA and SCL outputs have edge rate control circuits included
DEFINITIONS
R
C
R
L
L
T
GENERATOR
CC
= Load resistor; 1.1 k for I
= Load capacitance includes jig and probe capacitance;
= Termination resistance should be equal to Z
PULSE
to 0.5 V
100 pF for I
pulse generators.
Test circuit for open-drain outputs
CC
of the EXPSDA1 or EXPSCL1 pins and the SDA
2
C and 100 pF for EXP
MIN
105
110
109
130
160
300
300
V
58
—
Figure 6. Test circuit
IN
R
T
LIMITS
0.85 RC
2
TYP
202
259
193
153
234
110
C and 500
—
—
D.U.T.
V
CC
3
CC
V
for the EXPSDA1 or
OUT
MAX
PCA9518
389
265
327
179
279
187
for EXP.
Product data sheet
—
—
—
OUT
V
of
CC
SW01088
R
C
UNIT
UNIT
L
L
ns
ns
ns
ns
ns
ns
ns
ns
ns