PCA9555APW,118 NXP Semiconductors, PCA9555APW,118 Datasheet - Page 17

• Manufacturer Part Number: PCA9555APW,118
• Description: Interface - I/O Expanders 16b I2C BUS INTERUPT
• Manufacturer: NXP Semiconductors

Specifications of PCA9555APW,118

• Rohs: yes
• Maximum Operating Frequency: 100 kHz
• Operating Supply Voltage: 1.65 V to 5.5 V
• Operating Temperature Range: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Package / Case: TSSOP-24
• Operating Current: 160 mA
• Output Current: 25 mA
• Power Dissipation: 200 mW
• Product Type: I/O Expanders
• Factory Pack Quantity: 2500

NXP Semiconductors
PCA9555A
Product data sheet
8.3 Device current consumption with internal pull-up and pull-down
resistors
The PCA9555A integrates pull-up resistors to eliminate external components when pins
are configured as inputs and pull-up resistors are required (for example, nothing is driving
the inputs to the power supply rails. Since these pull-up resistors are internal to the device
itself, they contribute to the current consumption of the device and must be considered in
the overall system design.
If the resistor is configured as a pull-up, that is, connected to V
the V
appear as additional I
The pull-up resistors are simple resistors and the current is linear with voltage. The
resistance specification for these devices spans from 50 k with a nominal 100 k value.
Any current flow through these resistors is additive by the number of pins held LOW and
the current can be calculated by Ohm’s law. See
versus the number of pull-up resistors.
DD
pin through the resistor to ground when the pin is held LOW. This current will
All information provided in this document is subject to legal disclaimers.
Low-voltage 16-bit I
Rev. 1 — 11 September 2012
DD
upsetting any current consumption measurements.
2
C-bus I/O port with interrupt and weak pull-up
Figure 22
for a graph of supply current
DD
, a current will flow from
PCA9555A
© NXP B.V. 2012. All rights reserved.
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