参数资料
型号: 935269568118
厂商: NXP SEMICONDUCTORS
元件分类: 微控制器/微处理器
英文描述: 16 I/O, PIA-GENERAL PURPOSE, PDSO24
封装: 5.30 MM, PLASTIC, MO-150, SOT-340-1, SSOP-24
文件页数: 4/17页
文件大小: 151K
代理商: 935269568118
Philips Semiconductors
Product data
PCA9555
16-bit I2C and SMBus I/O port with interrupt
2002 Jul 26
12
SDA
SCL
SU01469
tHD;STA
tF
S
tLOW
tR
tHD;DAT
tSU;DAT
tHIGH
tF
tSU;STA
SR
tHD;STA
tSP
tSU;STD
P
tR
tBUF
S
Figure 11. Definition of timing
AC SPECIFICATIONS
SYMBOL
PARAMETER
STANDARD MODE
I2C BUS
FAST MODE
I2C BUS
UNITS
MIN
MAX
MIN
MAX
fSCL
Operating frequency
0
100
0
400
kHz
tBUF
Bus free time between STOP and START conditions
4.7
1.3
s
tHD;STA
Hold time after (repeated) START condition
4.0
0.6
s
tSU;STA
Repeated START condition setup time
4.7
0.6
s
tSU;STO
Setup time for STOP condition
4.0
0.6
s
tVD;ACK
Valid time of ACK condition2
0.3
3.45
0.1
0.9
s
tHD;DAT
Data in hold time
0
0
ns
tVD;DAT
Data out valid time3
300
50
ns
tSU;DAT
Data setup time
250
100
ns
tLOW
Clock LOW period
4.7
1.3
s
tHIGH
Clock HIGH period
4.0
0.6
s
tF
Clock/Data fall time
300
20 + 0.1Cb 1
300
ns
tR
Clock/Data rise time
1000
20 + 0.1Cb 1
300
ns
tSP
Pulse width of spikes that must be suppressed by the input
filters
50
50
ns
Port Timing
tPV
Output data valid
200
200
ns
tPS
Input data setup time
150
150
ns
tPH
Input data hold time
1
1
s
Interrupt Timing
tIV
Interrupt valid
4
4
s
tIR
Interrupt reset
4
4
s
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.
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