OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

PCA9518D,112

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21
PCA9518_5 © NXP B.V. 2008. All rights reserved.
Product data sheet Rev. 05 — 2 December 2008 7 of 21
NXP Semiconductors
PCA9518
Expandable 5-channel I
2
C-bus hub
is 1 µs or, when the bus 0 SDA reaches 0.7V
CC
, whichever occurs first. After both
EXPSDA2 and EXPSDA1 are HIGH the rest of the SDA lines are allowed to rise. The
same description applies for the EXPSCL1, EXPSCL2, and SCL pins.
Only two of the five channels on the PCA9518 Device 2 are being used. EN3 and EN4 are connected to GND to disable
channels 3 and 4 and/or SDA3/SCL3 and SDA4/SCL4 are pulled up to V
CC
. SDA0 and SCL0 can be used as a normal I
2
C-bus
port, but if unused then it must be pulled up to V
CC
since there is no enable pin.
The pull-ups shown on Device 2 channels 3 and 4 are not required if their enable pins (ENn) are permanently held LOW.
Fig 5. Typical application: multiple expandable 5-channel I
2
C-bus hubs
002aae326
V
CC
EXPSDA2
EXPSDA1
SCL1
SDA1
GND
EXPSCL1
EXPSCL2
SUBSYSTEM 1
SDA
SCL
400 kHz
5 V
SCL2
SDA2
SUBSYSTEM 2
SDA
SCL
400 kHz
3.3 V
SCL3
SDA3
SUBSYSTEM 3
SDA
SCL
100 kHz
5 V
SCL4
SDA4
SUBSYSTEM 4
SDA
SCL
100 kHz
3.3 V
PCA9518
SCL
SDA
EN2
EN1
EN3
EN4
SCL0
SDA0
DEVICE 1
BUS
MASTER
400 kHz
3.3 V
GND
EN2
EN1
EN3
EN4
SCL4
SDA4
V
CC
EXPSDA2
EXPSDA1
EXPSCL1
EXPSCL2
PCA9518
SCL0
SDA0
DEVICE 2
SCL1
SDA1
SUBSYSTEM 5
SDA
SCL
100 kHz
5 V
SCL2
SDA2
SUBSYSTEM 6
SDA
SCL
400 kHz
3.3 V
SCL3
SDA3
3.3 V
or 5 V
3.3 V
or 5 V
disabled;
not connected
PCA9518_5 © NXP B.V. 2008. All rights reserved.
Product data sheet Rev. 05 — 2 December 2008 8 of 21
NXP Semiconductors
PCA9518
Expandable 5-channel I
2
C-bus hub
It is important to note that any arbitration or clock stretching events on Bus 1 require that
the V
OL
of the devices on Bus 1 be 70 mV below the V
OL
of the PCA9518 (see V
OL
−V
ILc
in
Section 9 “Static characteristics”) to be recognized by the PCA9518 and then transmitted
to Bus 0.
Fig 6. Bus waveforms
Bus 0
V
OL
of master
SCL of
master
SDA of
master
9
th
clock cycle
t
stretch
V
OL
of PCA9518
9
th
clock cycle
EXPSDA1
t
PHL1
EXPSDA2
t
PHL2
t
PLH2
t
PLH2
, t
PLH1
expansion
bus
EXPSCL1
EXPSCL2
SCL of
slave
SDA of
slave
Bus 1
t
PHL
t
PLH
Bus n
with n > 1
V
OL
of slave V
OL
of PCA9518
002aae327
t
PLH1
PCA9518_5 © NXP B.V. 2008. All rights reserved.
Product data sheet Rev. 05 — 2 December 2008 9 of 21
NXP Semiconductors
PCA9518
Expandable 5-channel I
2
C-bus hub
8. Limiting values
[1] Voltages with respect to pin GND.
Table 3. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol Parameter Conditions Min Max Unit
V
CC
supply voltage V
CC
to GND
[1]
−0.5 +7 V
V
I2C-bus
I
2
C-bus voltage SCL or SDA
[1]
−0.5 +7 V
I
I
input current any pin - 50 mA
P
tot
total power dissipation - 300 mW
T
stg
storage temperature −55 +125 °C
T
amb
ambient temperature operating −40 +85 °C
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21

PCA9518D,112

Mfr. #:
Buy PCA9518D,112
Manufacturer:
NXP Semiconductors
Description:
IC I2C HUB 5CH EXPANDBL 20-SOIC
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet