參數(shù)資料
型號(hào): CDC922DLR
英文描述: CPU System Clock Generator
中文描述: CPU系統(tǒng)時(shí)鐘發(fā)生器
文件頁(yè)數(shù): 12/17頁(yè)
文件大?。?/td> 292K
代理商: CDC922DLR
CDC922
133-MHz CLOCK SYNTHESIZER/DRIVER FOR PC MOTHERBOARDS
WITH 3-STATE OUTPUTS
SCAS634 –JULY 28, 1999
12
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
switching characteristics, V
DD
= 3.135 V to 3.465 V, T
A
= 0
°
C to 85
°
C (continued)
48MHz
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ten1
tdis1
tc
Output enable time
SEL133/100
48MHz
f(48MHz) = 48 MHz
f(48MHz) = 48 MHz
f(48MHz) = 48 MHz
f(CPU) = 100 or 133 MHz
f(48MHz) = 48 MHz
f(48MHz) = 48 MHz
f(48MHz) = 48 MHz
f(48MHz) = 48 MHz
VO = 0.4 V to 2 V
VO = 0.4 V to 2 V
6
10
ns
Output disable time
48MHz clock period
SEL133/100
48MHz
8
10
ns
20.5
20.83
21.1
ns
Cycle to cycle jitter
500
ps
Duty cycle
45
55
%
tsk(p)
tw1
tw2
tr
tf
The average over any 1-
μ
s period of time is greater than the minimum specified period.
48MHz pulse skew
48MHz
48MHz
3
ns
Pulse duration width, high
7.8
ns
Pulse duration width, low
7.8
ns
Rise time
1
2.1
2.8
ns
Fall time
1
1.9
2.8
ns
REF
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ten1
tdis1
tc
Output enable time
SEL133/100
REFx
f(REF) = 14.318 MHz
f(REF) = 14.318 MHz
f(REF) = 14.318 MHz
f(CPU) = 100 or 133 MHz
f(REF) = 14.318 MHz
f(REF) = 14.318 MHz
f(REF) = 14.318 MHz
f(REF) = 14.318 MHz
f(REF) = 14.318 MHz
VO = 0.4 V to 2 V
VO = 0.4 V to 2 V
6
10
ns
Output disable time
REF clock period
SEL133/100
REFx
8
10
ns
69.84
ns
Cycle to cycle jitter
700
ps
Duty cycle
45
55
%
tsk(o)
tsk(p)
tw1
tw2
tr
tf
The average over any 1-
μ
s period of time is greater than the minimum specified period.
REF bus skew
REFx
REFx
150
250
ps
REF pulse skew
REFn
REFn
2
ns
Pulse duration width, high
26.2
32.7
ns
Pulse duration width, low
26.2
31.2
ns
Rise time
1
2
2.8
ns
Fall time
1
1.9
2.8
ns
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