PCAL6408AHKX NXP Semiconductors, PCAL6408AHKX Datasheet - Page 13

• Manufacturer Part Number: PCAL6408AHKX
• Description: Interface - I/O Expanders 8bit I2C/SMBus IO Expander w/Interrupt
• Manufacturer: NXP Semiconductors

Specifications of PCAL6408AHKX

• 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: XQFN-16
• Operating Current: 200 mA
• Output Current: 25 mA
• Product Type: I/O Expanders

NXP Semiconductors
PCAL6408A
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
shift register
shift register
shift register
write polarity
shift register
write pulse
latch pulse
write input
read pulse
data from
data from
data from
data from
PULL-UP/PULL-DOWN
pulse
pulse
write
DD(P)
On power-up or reset, all registers return to default values.
Simplified schematic of the I/Os (P0 to P7)
CONTROL
or V
configuration
register
input latch
register
D
CK
D
CK
All information provided in this document is subject to legal disclaimers.
SS
FF
FF
. The external voltage applied to this I/O pin should not exceed the
Q
Q
Q
Rev. 2 — 6 December 2012
Low-voltage translating, 8-bit I
V
output port
register
DD(P)
D
CK
FF
100 kΩ
Q
polarity inversion
register
D
CK
FF
input port
register
D
CK
Q
FF
Q
Q1
Q2
read pulse
2
C-bus/SMBus I/O expander
DD
INTERRUPT
PCAL6408A
MASK
ESD
protection
diode
ESD
protection
diode
to a maximum of 5.5 V.
© NXP B.V. 2012. All rights reserved.
input port
latch
D
EN
LATCH
output port
register data
V
P0 to P7
V
input port
register data
to INT
Q
DD(P)
SS
002aah089
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