參數資料
型號: 935275672112
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, PDSO20
封裝: 4.40 MM, PLASTIC, MO-152, SOT-266-1, SSOP-20
文件頁數: 8/33頁
文件大小: 316K
代理商: 935275672112
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)
相關PDF資料
PDF描述
935275581118 8 I/O, PIA-GENERAL PURPOSE, PDSO16
935275617512 8 I/O, PIA-GENERAL PURPOSE, PDSO16
933851670112 8 I/O, PIA-GENERAL PURPOSE, PDIP16
935275617118 8 I/O, PIA-GENERAL PURPOSE, PDSO16
933851660118 8 I/O, PIA-GENERAL PURPOSE, PDSO16
相關代理商/技術參數
參數描述
935277864112 制造商:NXP Semiconductors 功能描述:IC CPU
935278818112 制造商:NXP Semiconductors 功能描述:LCD DRVR 20DIGIT 2.5V/3.3V/5V 56-Pin VSO Tube
935280517132 制造商:NXP Semiconductors 功能描述:IC TRANSLATING BUFFER 6XSON
935281751112 制造商:NXP Semiconductors 功能描述:IC BUFFER/DVR 16BIT 3ST 48TSSOP
935281751118 制造商:NXP Semiconductors 功能描述:IC BUFFER/DVR 16BIT 3ST 48TSSOP