PCA6416A NXP [NXP Semiconductors], PCA6416A Datasheet - Page 17

• Manufacturer Part Number: PCA6416A
• Description: Low-voltage translating 16-bit I2C-bus/SMBus I/O expander
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
PCA6416A
Product data sheet
9.2 Power-on reset requirements
In the event of a glitch or data corruption, PCA6416A can be reset to its default conditions
by using the power-on reset feature. Power-on reset requires that the device go through a
power cycle to be completely reset. This reset also happens when the device is
powered on for the first time in an application.
The two types of power-on reset are shown in
Table 15
types of power-on reset.
Fig 15. High value resistor in parallel with
Fig 17. V
Fig 18. V
V
DD(P)
V
ramp-up
(dV/dt)
DD(P)
specifies the performance of the power-on reset feature for PCA6416A for both
V
the LED
DD(P)
DD(P)
DD(P)
r
Pn
V
is lowered below 0.2 V or to 0 V and then ramped up to V
is lowered below the POR threshold, then ramped back up to V
All information provided in this document is subject to legal disclaimers.
I
drops below POR levels
Rev. 1 — 11 September 2012
LED
Low-voltage translating 16-bit I
ramp-down
002aah278
100 kΩ
(dV/dt)
V
ramp-down
DD
f
(dV/dt)
to V
f
when V
time to re-ramp
POR(min)
Fig 16. Device supplied by a lower voltage
Figure 17
below 0.2 V or to V
DD(P)
when V
t
d(rst)
time to re-ramp
− 50 mV
drops
t
d(rst)
DD(P)
and
drops
V
2
SS
3.3 V
C-bus/SMBus I/O expander
DD(P)
Figure
ramp-up
(dV/dt)
Pn
re-ramp-up
(dV/dt)
PCA6416A
18.
r
5 V
DD(P)
002aah279
r
© NXP B.V. 2012. All rights reserved.
LED
002aag961
DD(P)
time
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time