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參數(shù)資料
| 型號： | XRK4991ACJ-7 |
| 廠商： | EXAR CORP |
| 元件分類： | 時鐘及定時 |
| 英文描述： | 3.3V HIGH-SPEED (85 MHZ) PROGRAMMABLE SKEW CLOCK BUFFER |
| 中文描述： | 4991 SERIES, PLL BASED CLOCK DRIVER, 8 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PQCC32 |
| 封裝： | PLASTIC, LCC-32 |
| 文件頁數(shù)： | 3/13頁 |
| 文件大?。?/td> | 255K |
| 代理商： | XRK4991ACJ-7 |
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REV. P1.0.2
PRELIMINARY
3.3V HIGH-SPEED (85 MHZ) PROGRAMMABLE SKEW CLOCK BUFFER
XRK4991A
3
PIN DESCRIPTIONS
P
IN
N
AME
P
IN
#
T
YPE
D
ESCRIPTION
CLKIN
1
I
Reference frequency input. This input supplies the frequency and timing against
which all functional variation is measured.
FB_IN
17
I
PLL feedback input (typically connected to one of the eight outputs).
FSEL
3
I
Three-level frequency range select. Set Table 2.
SELA0
SELA1
26
27
I
Three-level function selects inputs for output pair 1 (QA0, QA0]). Table 3.
SELB0
SELB1
29
30
I
Three-level function selects inputs for output pair 2 (QB0, QB1). Table 3.
SELC0
SELC1
4
5
I
Three-level function selects inputs for output pair 3 (QC0, QC1). See Table 3.
SELD0
SELD1
7
1
I
Three-level function selects inputs for output pair 4 (QD0, QD1). See Table 3.
TEST
31
I
Three-level select. See test mode section under the block diagram descriptions.
OE
28
I
Synchronous Output Enable. When HIGH, it stops clock outputs (except QC[1:0])
in a "Low" state - QC[1:0] may be used as the feedback signal to maintain phase
lock. When TEST is held at MID level and OE is "High", the nF[1:0] pins act as
output disable controls for individual banks when nF[1:0] = LL. Set OE "Low" for
normal operation.
PE
8
I
Selectable positive or negative edge control. When "Low"/"High" the outputs are
synchronized with the negative/positive edge of the reference clock.
QA0
QA1
24
23
O
Output pair 1. See Table 2.
QB0
QB1
20
19
O
Output pair 2. See Table 2.
QC0
QC1
15
14
O
Output pair 3. See Table 2.
QD0
QD1
11
10
O
Output pair 4. See Table 2.
V
CCN
9
16
18
25
PWR
Power supply for output drivers.
V
CCQ
2
PWR
Power supply for internal circuitry.
GND
12
13
21
22
32
PWR
Ground.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XRK4991AIJ-5 | 制造商:EXAR 制造商全稱:EXAR 功能描述:3.3V HIGH-SPEED (85 MHZ) PROGRAMMABLE SKEW CLOCK BUFFER |
| XRK4991AIJ-7 | 制造商:EXAR 制造商全稱:EXAR 功能描述:3.3V HIGH-SPEED (85 MHZ) PROGRAMMABLE SKEW CLOCK BUFFER |
| XRK4991CJ-2 | 制造商:EXAR 制造商全稱:EXAR 功能描述:3.3V HIGH-SPEED (85 MHZ) PROGRAMMABLE SKEW CLOCK BUFFER |
| XRK4991CJ-5 | 制造商:EXAR 制造商全稱:EXAR 功能描述:3.3V HIGH-SPEED (85 MHZ) PROGRAMMABLE SKEW CLOCK BUFFER |
| XRK4991CJ-7 | 制造商:EXAR 制造商全稱:EXAR 功能描述:3.3V HIGH-SPEED (85 MHZ) PROGRAMMABLE SKEW CLOCK BUFFER |
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