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參數(shù)資料
| 型號： | 935275581112 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8 I/O, PIA-GENERAL PURPOSE, PDSO16 |
| 封裝： | 7.50 MM, LEAD FREE, PLASTIC, MS-013, SOT-162-1, SO-16 |
| 文件頁數(shù)： | 8/33頁 |
| 文件大?。?/td> | 316K |
| 代理商： | 935275581112 |
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2002 Nov 22
16
Philips Semiconductors
Product specication
Remote 8-bit I/O expander for I2C-bus
PCF8574
11 I2C-BUS TIMING CHARACTERISTICS
Note
1. All the timing values are valid within the operating supply voltage and ambient temperature range and refer to VIL
and VIH with an input voltage swing of VSS to VDD.
SYMBOL
PARAMETER
MIN.
TYP.
MAX.
UNIT
I2C-bus timing (see Fig.16; note 1)
fSCL
SCL clock frequency
100
kHz
tSW
tolerable spike width on bus
100
ns
tBUF
bus free time
4.7
s
tSU;STA
START condition set-up time
4.7
s
tHD;STA
START condition hold time
4.0
s
tLOW
SCL LOW time
4.7
s
tHIGH
SCL HIGH time
4.0
s
tr
SCL and SDA rise time
1.0
s
tf
SCL and SDA fall time
0.3
s
tSU;DAT
data set-up time
250
ns
tHD;DAT
data hold time
0
ns
tVD;DAT
SCL LOW to data out valid
3.4
s
tSU;STO
STOP condition set-up time
4.0
s
Fig.16 I2C-bus timing diagram.
handbook, full pagewidth
PROTOCOL
SCL
SDA
MBD820
BIT 0
LSB
(R/W)
t HD;STA
t
SU;DAT
t
HD;DAT
t
VD;DAT
t SU;STO
t
f
r
t
BUF
t
SU;STA
t
LOW
t HIGH
1 / f SCL
START
CONDITION
(S)
BIT 7
MSB
(A7)
BIT 6
(A6)
ACKNOWLEDGE
(A)
STOP
CONDITION
(P)
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