PCA6408APW,118 NXP Semiconductors, PCA6408APW,118 Datasheet - Page 9

• Manufacturer Part Number: PCA6408APW,118
• Description: Interface - I/O Expanders 8bit IO Expander Low Voltage TSSOP
• Manufacturer: NXP Semiconductors

Specifications of PCA6408APW,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-16
• Operating Current: 200 mA
• Output Current: 10 mA
• Product Type: I/O Expanders

NXP Semiconductors
PCA6408A
Product data sheet
7.5 I/O port
When an I/O is configured as an input, FETs Q1 and Q2 are off, which creates a
high-impedance input. The input voltage may be raised above V
If the I/O is configured as an output, Q1 or Q2 is enabled, depending on the state of the
Output port register. In this case, there are low-impedance paths between the I/O pin and
either V
recommended levels for proper operation.
Fig 7.
configuration
write polarity
shift register
shift register
shift register
write pulse
read pulse
data from
data from
data from
pulse
pulse
write
DD(P)
On power-up or reset, all registers return to default values.
Simplified schematic of P0 to P7
or V
configuration
register
D
CK
All information provided in this document is subject to legal disclaimers.
SS
FF
. The external voltage applied to this I/O pin should not exceed the
Q
Q
Rev. 1 — 27 September 2012
output port
register
D
CK
FF
Low-voltage, 8-bit I
Q
input port
register
polarity
inversion
register
D
CK
D
CK
FF
FF
Q
Q
2
Q1
C-bus and SMBus I/O expander
Q2
DD
PCA6408A
to a maximum of 5.5 V.
ESD
protection
diode
© NXP B.V. 2012. All rights reserved.
output port
register data
V
P0 to P7
V
input port
register data
to INT
polarity
inversion
register data
DD(P)
SS
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