參數(shù)資料
型號: PDIUSBH12N
廠商: NXP SEMICONDUCTORS
元件分類: 總線控制器
英文描述: USB 2-port hub
中文描述: UNIVERSAL SERIAL BUS CONTROLLER, PDIP28
封裝: 0.600 INCH, PLASTIC, DIP-28
文件頁數(shù): 23/28頁
文件大小: 170K
代理商: PDIUSBH12N
Philips Semiconductors
Product specification
PDIUSBH12
USB 2-port hub
1999 Jul 22
23
AC CHARACTERISTICS (I
2
C pins)
All timing values are valid within the operating supply voltage and ambient temperature range and reference to V
IL
and V
IH
with an input voltage
swing of V
SS
and V
DD
.
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
MAX
UNIT
f
SCL
t
BUF
t
SU;STA
t
HD;STA
t
LOW
t
HIGH
t
r
t
f
t
SU;DAT
t
HD;DAT
t
VD;DAT
t
SU;STO
SCL clock frequency
1000
kHz
Bus free time
0.5
μ
s
μ
s
μ
s
μ
s
μ
s
μ
s
μ
s
Start condition set-up time
0.25
Start condition hold time
0.25
SCL LOW time
0.45
SCL HIGH time
0.45
SCL and SDA rise time
0.3
SCL and SDA fall time
0.1
Data set-up time
100
ns
Data hold time
0
ns
SCL
LOW to data out valid
0.4
μ
s
μ
s
Stop condition set-up time
0.25
A detailed description of the I
2
C-bus specification, with applications, is given in the brochure “The I
2
C-bus and how to use it”. This brochure may
be ordered using the Philips order number 9398 393 40011.
SV00756
SCL
SDA
PROTOCOL
t
SU;STA
t
LOW
t
HIGH
1/f
SCL
t
BUF
t
r
t
f
t
HD;STA
t
SU;DAT
t
HD;DAT
t
VD:DAT
t
SU;STO
BIT 0
LSB
(R/W)
ACKNOWLEDGE
(A)
STOP
CONDITION
(P)
START
CONDITION
(S)
BIT 7
MSB
(A7)
BIT 6
(A6)
Figure 4. I
2
C-bus timing diagram
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