PCA9538PW,112 NXP Semiconductors, PCA9538PW,112 Datasheet - Page 12

• Manufacturer Part Number: PCA9538PW,112
• Description: IC I/O EXPANDER I2C 8B 16TSSOP
• Manufacturer: NXP Semiconductors

Specifications of PCA9538PW,112

• Interface: I²C, SMBus
• Number Of I /o: 8
• Interrupt Output: Yes
• Frequency - Clock: 400kHz
• Voltage - Supply: 2.3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP
• Includes: POR
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 935277419112; PCA9538PW; PCA9538PW

NXP Semiconductors
PCA9538_5
Product data sheet
7.1 Minimizing I
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 I/O pins greater than or equal to V
Figure 12
than the LED supply voltage by at least 1.2 V. Both of these methods maintain the I/O V
at or above V
Fig 12. High value resistor in parallel with
I
is about 1.2 V less than V
the LED
shows a high value resistor in parallel with the LED.
V
DD
DD
DD
IOn
.
DD
and prevents additional supply current consumption when the LED is off.
8-bit I
when the I/Os are used to control LEDs
Figure
2
Rev. 05 — 28 May 2009
C-bus and SMBus low power I/O port with interrupt and reset
LED
11. Since the LED acts as a diode, when the LED is off the
002aac660
100 k
DD
. The supply current, I
V
DD
Fig 13. Device supplied by a lower voltage
DD
, increases as V
3.3 V
V
DD
Figure 13
IOn
DD
when the LED is off.
PCA9538
5 V
002aac661
© NXP B.V. 2009. All rights reserved.
shows V
DD
I
LED
becomes
through a
DD
12 of 28
less
I