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| PCA6408A Datasheet, PDF (27/40 Pages) NXP Semiconductors – Low-voltage, 8-bit I2C-bus and SMBus I/O expander with interrupt output, reset, and configuration registers | |||
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NXP Semiconductors
PCA6408A
Low-voltage, 8-bit I2C-bus and SMBus I/O expander
VDD(I2C-bus)
DUT
SDA
RL = 1 kΩ
CL = 50 pF
a. SDA load configuration
002aag977
START
SCL
DUT
Pn
500 Ω
CL = 50 pF 500 Ω
2 Ã VDD(P)
b. P port load configuration
002aag981
ACK or read cycle
SDA
0.3 Ã VDD(I2C-bus)
trst
RESET
Pn
trec(rst)
tw(rst)
trst
0.5 Ã VDD(I2C-bus)
trec(rst)
0.5 Ã VDD(P)
002aag984
c. RESET timing
CL includes probe and jig capacitance.
All inputs are supplied by generators having the following characteristics: PRR ï£ 10 MHz; Zo = 50 ï; tr/tf ï£ 30 ns.
The outputs are measured one at a time, with one transition per measurement.
I/Os are configured as inputs.
All parameters and waveforms are not applicable to all devices.
Fig 29. Reset load circuits and voltage waveforms
PCA6408A
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 â 27 September 2012
© NXP B.V. 2012. All rights reserved.
27 of 40
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