參數(shù)資料
型號(hào): AK2540
廠商: Asahi Kasei Microsystems Co.,Ltd
英文描述: Quad T1 Transceiver
中文描述: 的4 T1收發(fā)器
文件頁數(shù): 13/33頁
文件大?。?/td> 159K
代理商: AK2540
ASAHI K ASEI [AK2540]
MS0012-E-00 2000/1
13
AC CHARACTERISTICS(Clock/Data)
Parameter
Symbol
Min
Typ
Max
Units Conditions
Clock Frequency
MCLK 1
MCLK 2
fci1
fci2
1.543846
24.70153
1.
544000
24.70400
1.544154
24.70647
MHz
±
100ppm
Note 1
MCLK 1
324
ns
Refer to Fig.4
1.544MHz
Clock Pulse Width
MCLK 2
t
pwhi
t
pwli
20
ns
Refer to Fig.4
24.704MHz
Clock Pulse Width
TCLK
t
pwhi
t
pwli
324
ns
Refer to Fig.2
Clock Pulse Width
RCLK
t
pwho
t
pwlo
324
ns
Refer to Fig.1
Note 3
Duty Cycle
RCLK
TCLK
50
%
Note 2
Note 3
Setup/Hold Time
RCLK
RPOS
RNEG
t
su1
t
h1
150
ns
Refer to Fig.1
Setup/Hold Time
TCLK
TPOS
TNEG
t
su2
t
h2
50
ns
Refer to Fig.2
Rise Time
RCLK, TCLK
RPOS, TOPS
RNEG, TNEG
t
r
50
ns
Refer to Fig.3
Note3
Fall Time
RCLK, TCLK
RPOS, TPOS
RNEG, TNEG
t
f
50
ns
Refer to Fig.3
Note3
Note 1: All AK2540 specifications are to be within the limit with
±
100ppm MCLK.
However, MCLK needs to be within
±
32ppm range in order to transmit AIS of
±
32 ppm
accuracy during the loss of TCLK.
Note 2: Duty Cycle:(t
pwho
/( t
pwho
+ t
pwlo
))
×
100%
Note 3: Drive 15pF Load Capacitance
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