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PCA967x Family Supports the Fast-mode Plus (Fm+) Protocol
Designed for the Fast-mode Plus version
of the I²C-bus, the PCA967x GPIO expanders
from NXP provide faster control
of slave devices and enable a higher
drive capability. They are backward
compatible with the Fast-mode and
standard I²C-bus protocols, and are ideal
for use in applications such as LED control,
servers, industrial control, medical
equipment and cellular phones.
The PCA967x family expands NXP’s portfolio
of GPIO for the I²C-bus and includes
the first remote I/O expanders that support
the Fast-mode Plus (Fm+) protocol, and can
be used as drop-in upgrades to PCF8574
and PCF8575 I/O expander devices.
Significant improvements
The PCA967x family offers significant improvements
compared with previous generations
of I²C-bus GPIO, e.g. higher bus
speeds (1 MHz instead of 400 kHz) and
higher SDA drive capability (30 mA instead
of 3 mA). Due to the high maximum bus
speed, these expanders can use software
PWM to dim LEDs, and can accommodate
more devices on the same bus without
buffers. The 8-bit and 16-bit I/O expanders
consume very little current and include
latched outputs, capable of driving up to
25 mA of current that can control an LED
directly.
Other features include:
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Total package sink capability of 200mA
(8-bit devices) or 400 mA (16-bit devices) |
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64 programmable slave addresses using
two address pins to avoid address conflicts |
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Operating voltage of 2.3 to 5.5 V,
with I/Os tolerant to 5.5 V |
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Low standby current (10 µA) |
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Open-drain active LOW interrupt output |
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Three ways to reset device to default
state: power-on-reset, RESET input or software
command |
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Temperature range: –40 to +85 °C |
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Wide range of package types: SO,
TSSOP, SSOP, QSOP, DHVQFN, HVQFN and
DIP |
PCA967x Family Type Range
Additional Information
For more details regarding NXP´s PCA967x
family, simply contact your SPOERLE
representative or visit www.nxp.com
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