Table 29: Timing Definition for Standard Mode and Fast Mode
參數(shù)資料
型號: IDT82V3202NLG
廠商: IDT, Integrated Device Technology Inc
文件頁數(shù): 58/117頁
文件大?。?/td> 0K
描述: IC PLL WAN EBU SGL 68-VFQFPN
標準包裝: 21
類型: 時鐘/頻率發(fā)生器,多路復用器
PLL:
主要目的: 以太網(wǎng),SONET/SDH,Stratum
輸入: CMOS
輸出: CMOS,LVDS,PECL
電路數(shù): 1
比率 - 輸入:輸出: 2:2
差分 - 輸入:輸出: 無/是
頻率 - 最大: 622.08MHz
電源電壓: 3 V ~ 3.6 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 68-VFQFN 裸露焊盤
供應商設備封裝: 68-VFQFPN(10x10)
包裝: 托盤
其它名稱: 82V3202NLG
IDT82V3202
EBU WAN PLL
I2C Programming Interface
45
September 11, 2009
Table 29: Timing Definition for Standard Mode and Fast Mode(1)
Symbol
Parameter
Standard Mode
Fast Mode
Unit
Min
Max
Min
Max
SCL
Serial clock frequency
0
100
0
400
KHz
tHD; STA
Hold time (repeated) START condition. After this period, the
first clock pulse is generated
4.0
-
0.5
-
s
tLOW
LOW period of the SCL clock
4.7
-
1.3
-
s
tHIGH
HIGH period of the SCL clock
4.0
-
0.6
-
s
tSU; STA
Set-up time for a repeated START condition
4.7
-
0.6
-
s
tHD; DAT
Data hold time: for CBUS compatible masters for I2C-bus
devices
5.0
0(2)
-
3.45(3)
-
0(2)
-
0.9(3)
s
tSU; DAT
Data set-up time
250
-
100(4)
-ns
tr
Rise time of both SDA and SCL signals
-
1000
20 + 0.1Cb(5)
300
ns
tf
Fall time of both SDA and SCL signals
-
300
20 + 0.1Cb(5)
300
ns
tSU; STO
Set-up time for STOP condition
4.0
-
0.6
-
s
tBUF
Bus free time between a STOP and START condition
4.7
-
1.3
-
s
Cb
Capacitive load for each bus line
-
400
-
400
pF
VnL
Noise margin at the LOW level for each connected device
(Including hysteresis)
0.1VDD
-
0.1VDD
-
V
VnH
Noise margin at the HIGH level for each connected device
(Including hysteresis)
0.2VDD
-
0.2VDD
-
V
tsp
Pulse width of spikes which must be suppressed by the input
filter
050
0
50
ns
Note:
1. All values referred to
VIHmin and VILmax levels (see Table 37)
2. A device must Internally provide a hold time of at least 300 ns for the SDA signal (referred to the VIHmin of the SCL signal) to bridge the undefined region of the fall-
ing edge of SCL.
3. The maximum tHD; DAT has only to be met if the device does not strech the LOW period (tLOW) of the SCL signal.
4. A Fast-mode I2C-bus device can be used in a Standard-mode I2C-bus system, but the requirement tSU; DAT ≥ 250 ns must then be met. This will automatically be
the case if the device does not stretch the LOW period of the SCL signal. If such a device does stretch the LOW period of the SCL signal, it must output the next data
bit to the SDA line trmax + tSU; DAT = 1000 + 250 = 1250 ns (according to the Standard-mode I2C-bus specification) before the SCL line is released.
5. Cb = total capacitance of one bus line in pF. If mixed with Hs-mode device, faster fall-times according to Table 39 allowed.
n/a = not applicable
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