pca9535d NXP Semiconductors, pca9535d Datasheet - Page 17

• Manufacturer Part Number: pca9535d
• Description: 16-bit I2c And Smbus, Low Power I/o Port With Interrupt
• Manufacturer: NXP Semiconductors

NXP Semiconductors
9. Limiting values
PCA9535_PCA9535C_3
Product data sheet
8.1 Minimizing I
When the PCA9535 I/Os are used to control LEDs, they are normally connected to V
through a resistor as shown in
off the I/O V
becomes lower than V
Designs needing to minimize current consumption, such as battery power applications,
should consider maintaining the I/O pins greater than or equal to V
Figure 18
than the LED supply voltage by at least 1.2 V. Both of these methods maintain the I/O V
or above V
This concern does not occur in the case of PCA9535C because the I/O pins are
open-drain.
Table 13.
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol
V
V
I
I
I
I
P
T
T
O
I
DD
SS
Fig 18. High value resistor in parallel with
stg
amb
DD
I/O
tot
the LED
shows a high value resistor in parallel with the LED.
V
DD
Limiting values
DD
I
LEDn
Parameter
supply voltage
voltage on an input/output pin
output current
input current
supply current
ground supply current
total power dissipation
storage temperature
ambient temperature
is about 1.2 V less than V
and prevents additional supply current consumption when the LED is off.
DD
when the I/Os are used to control LEDs
DD
Rev. 03 — 4 October 2007
.
LED
16-bit I
Figure
002aac189
100 k
2
C-bus and SMBus, low power I/O port with interrupt
V
DD
17. Since the LED acts as a diode, when the LED is
DD
Conditions
on an I/O pin
operating
. The supply current, I
PCA9535; PCA9535C
Fig 19. Device supplied by a lower voltage
Min
V
-
-
-
-
-
0.5
65
40
3.3 V
SS
V
DD
LEDn
Figure 19
DD
0.5
, increases as V
DD
when the LED is off.
5 V
Max
+6.0
6
160
200
200
+150
+85
002aac190
© NXP B.V. 2007. All rights reserved.
50
20
shows V
LED
DD
I
Unit
V
V
mA
mA
mA
mA
mW
17 of 32
C
C
less
DD
I
at