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PC87351 bảng dữ liệu(PDF) 79 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
tên linh kiện PC87351
Giải thích chi tiết về linh kiện  PC87351 PC98 and ACPI Compliant SuperI/O with System Wake-Up Control
PDF  86 Pages
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nhà sản xuất  NSC [National Semiconductor (TI)]
Trang chủ  http://www.national.com
Logo NSC - National Semiconductor (TI)

PC87351 bảng dữ liệu(HTML) 79 Page - National Semiconductor (TI)

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11.0 Device Characteristics (Continued)
79
www.national.com
11.2.5
PCICLK Timing Specifications
1. The PCI may have any clock frequency between nominal DC and 33 MHz.
Device operational parameters at frequencies under 16 MHz may be guar-
anteed by design rather than by testing. The clock frequency may be
changed at any time during the operation of the system as long as the clock
edges remain “clean” (monotonic) and the minimum cycle and high and low
times are not violated. The clock may only be stopped in a low state.
2. Rise and fall times are specified in terms of the edge rate measured in V/ns.
This slew rate must be met across the minimum peak-to-peak portion of
the clock wavering as shown below.
Symbol
Parameter
Min
Max
Units
tCYC
1
PCICLK Cycle Time
30
∞
ns
tHIGH
PCICLK High Time
11
ns
tLOW
PCCLK Low Time
11
ns
-
PCICLK Slew Rate2
1
4
V/ns
2.4 V
0.4 V
2.0 V
1.5 V
0.8 V
2.0 V, p-to-p
(minimum)
tHIGH
tLOW
tCYC



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