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參數(shù)資料
| 型號： | S2074 |
| 廠商： | APPLIEDMICRO INC |
| 元件分類： | 通信及網(wǎng)絡 |
| 英文描述： | Six Port Bypass and Repeater for FC-AL(用于FC-AL的六端口旁路電路和中繼器) |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PQFP64 |
| 封裝： | PLASTIC, QFP-64 |
| 文件頁數(shù)： | 11/13頁 |
| 文件大小： | 159K |
| 代理商： | S2074 |
11
SIX PORT BYPASS AND REPEATER FOR FC-AL
S2074
February 9, 2000 / Revision D
POWER SUPPLY SEQUENCING
When the S2074 is operated with a 5 volt controller,
it is recommended that power be applied to the
S2074 before or simultaneously (time difference less
than 1 ms) with the application of power to the 5 volt
controller. If this condition cannot be met, series re-
sistance of at least 33 Ohms is required on all TTL
inputs driven from the 5 volt environment.
Please note that 33 Ohms is already recommended
on dynamically switching input signals such as
REFCLK and LCKREFN to limit overshoot and ring-
ing. Static control lines such as EN[5:0], BYPASS,
and REFSEL should also be provided with series
resistors of at least 33 Ohms (100 Ohms recom-
mended) to limit input current if the 5 volt environ-
ment is powered while the 3.3 volt VCC of the S2074
is off.
Figure 8. Timing Waveforms
Figure 9. Differential Input/Output Voltage
IN P/N
DI P/N
DO P/N
T
DD
VIN/OUT (+)
VIN/OUT (–)
VIN/OUT (+) – VIN/OUT (–)
VSWING
VIN/OUT = 2 X VSWING
Note: V
IN/OUT (+)
– V
IN/OUT (–)
is the algebraic difference of the input/output signals.
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