PCA9555 查看數據表（PDF） - NXP Semiconductors.
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PCA9555 Datasheet PDF : 34 Pages
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NXP Semiconductors
PCA9555
16-bit I2C-bus and SMBus I/O port with interrupt
SDA
tBUF
SCL
tr
tLOW
tHD;STA
P
S
tHD;DAT
tf
tHIGH
tSU;DAT
Fig 23. Definition of timing on the I2C-bus
12. Test information
tHD;STA
tSP
tSU;STA
Sr
tSU;STO
P
002aaa986
PULSE
GENERATOR
VDD
VI
VO
DUT
RT
RL
500 Ω
VDD
open
GND
CL
50 pF
002aab284
RL = load resistor.
CL = load capacitance includes jig and probe capacitance.
RT = termination resistance should be equal to the output impedance of Zo of the pulse generators.
Fig 24. Test circuitry for switching times
from output under test
CL
50 pF
Fig 25. Load circuit
RL
S1
500 Ω
RL
500 Ω
2VDD
open
GND
002aac226
PCA9555_8
Product data sheet
Rev. 08 — 22 October 2009
© NXP B.V. 2009. All rights reserved.
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