PCA9554 查看數據表（PDF） - Philips Electronics
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PCA9554 Datasheet PDF : 20 Pages
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Philips Semiconductors
8-bit I2C and SMBus I/O port with interrupt
Product data sheet
PCA9554/PCA9554A
SDA
tF
SCL
S
tLOW
tR
tSU;DAT
tF
tHD;STA
tHD;STA
tHD;DAT tHIGH
tSU;STA
SR
Figure 12. Definition of timing
tSP
tR
tBUF
tSU;STD
P
S
SU01469
AC SPECIFICATIONS
SYMBOL
PARAMETER
STANDARD MODE
I2C-BUS
MIN
MAX
fSCL
tBUF
tHD;STA
tSU;STA
tSU;STO
tHD;DAT
tVD;ACK
tVD;DAT
tSU;DAT
tLOW
tHIGH
tF
tR
tSP
Operating frequency
0
Bus free time between STOP and START conditions
4.7
Hold time after (repeated) START condition
4.0
Repeated START condition setup time
4.7
Setup time for STOP condition
4.0
Data in hold time
0
Valid time for ACK condition2
0.3
Data out valid time3
300
Data setup time
250
Clock LOW period
4.7
Clock HIGH period
4.0
Clock/Data fall time
—
Clock/Data rise time
—
Pulse width of spikes that must be suppressed by the
—
input filters
100
—
—
—
—
—
3.45
—
—
—
—
300
1000
50
Port Timing
tPV
Output data valid
tPS
Input data setup time
tPH
Input data hold time
Interrupt Timing
—
200
100
—
1
—
tIV
Interrupt valid
tIR
Interrupt reset
—
4
—
4
NOTES:
1. Cb = total capacitance of one bus line in pF.
2. tVD;ACK = time for Acknowledgement signal from SCL LOW to SDA (out) LOW.
3. tVD;DAT = minimum time for SDA data out to be valid following SCL LOW.
FAST MODE
I2C-BUS
MIN
MAX
0
400
1.3
—
0.6
—
0.6
—
0.6
—
0
—
0.1
0.9
50
—
100
—
1.3
—
0.6
—
20 + 0.1 Cb1
300
20 + 0.1 Cb1
300
—
50
—
200
100
—
1
—
—
4
—
4
UNITS
kHz
µs
µs
µs
µs
ns
µs
ns
ns
µs
µs
ns
ns
ns
ns
ns
µs
µs
µs
2004 Sep 30
12
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