PCA9534D,112 NXP Semiconductors, PCA9534D,112 Datasheet - Page 10

• Manufacturer Part Number: PCA9534D,112
• Manufacturer: NXP Semiconductors

Specifications of PCA9534D,112

• Operating Temperature (min): -40C
• Operating Temperature Classification: Industrial
• Operating Temperature (max): 85C
• Package Type: SO
• Rad Hardened: No
• Lead Free Status / RoHS Status: Compliant

NXP Semiconductors
7. Application design-in information
PCA9534_3
Product data sheet
Fig 12. Typical application
V
DD
(5 V)
Device address configured as 0100 100X for this example.
IO0, IO1, IO2 configured as outputs.
IO3, IO4, IO5 configured as inputs.
IO6, IO7 are not used and must be configured as outputs.
CONTROLLER
MASTER
V
V
DD
SS
7.1 Minimizing I
SDA
SCL
INT
When the I/Os are used to control LEDs, they are normally connected to V
resistor as shown in
I/O V
lower than V
Designs needing to minimize current consumption, such as battery power applications,
should consider maintaining the IOn pins greater than or equal to V
off.
less than the LED supply voltage by at least 1.2 V. Both of these methods maintain the
I/O V
is off.
10 k
Figure 13
I
I
is about 1.2 V less than V
at or above V
10 k
DD
shows a high value resistor in parallel with the LED.
10 k
.
DD
when the I/O us used to control LEDs
DD
Figure
10 k
Rev. 03 — 6 November 2006
and prevents additional supply current consumption when the LED
SCL
SDA
INT
A2
A1
A0
8-bit I
12. Since the LED acts as a diode, when the LED is off the
PCA9534
DD
V
V
SS
DD
2
. The supply current, I
C-bus and SMBus low power I/O port with interrupt
IO0
IO1
IO2
IO3
IO4
IO5
IO6
IO7
2 k
5 V
DD
100 k
( 3)
, increases as V
enable
Figure 14
DD
(e.g., alarm system)
(e.g., temp. sensor)
INT
RESET
A
B
ALARM
PCA9534
when the LED is
SUBSYSTEM 1
SUBSYSTEM 2
SUBSYSTEM 3
© NXP B.V. 2006. All rights reserved.
(e.g., counter)
controlled switch
(e.g., CBT device)
DD
I
becomes
shows V
002aac476
through a
V
DD
10 of 25
DD