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參數(shù)資料
| 型號： | SII0680A |
| 元件分類： | 存儲控制器/管理單元 |
| 英文描述： | IDE COMPATIBLE, CD ROM CONTROLLER, PQFP144 |
| 封裝： | LQFP-144 |
| 文件頁數(shù)： | 6/34頁 |
| 文件大?。?/td> | 280K |
| 代理商： | SII0680A |
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SiI 0680A Data Sheet Revision 1.31-1
14
Subject to change without notice
2.4
ATA/ATAPI-6 AC/DC Specifications
Limits
Symbol
Parameter
Condition
Min
Max
Unit
IOL
Output Sink Current
-
4
-
mA
IOH
Output Source Current
-
400
-
A
V+
Low-to-High Input Threshold
-
1.5
2.0
V
V-
High-to-Low Input Threshold
-
1.0
1.5
V
VOH
Output Voltage High
-6 m A < IOUT < 3 mA
VDD -
0.51
VDD+
0.3
V
VOL
Output Voltage Low
IOUT = 6 mA
-
0.51
V
Table 2-5: ATA/ATAPI-6 DC Specifications
2.5
Power Supply Bypass Considerations
It is recommended that a 4 -layer board (minimum) with internal Power and Ground Planes be used when i integrating the
SiI 0680A . Good high-speed layout techniques should be used and proper power supply bypassing is essential. Both
bulk and local (high frequency) bypass capacitors should be used.
Bulk bypassing is intended to reduce the voltage noise (droop) induced by changes in load current and the inductance in
the power distribution system (wires and/or etch). Since the currents vary greatly from no activity to worst case data
patterns, a significant amount of capacitance is required.
All bypass capacitors should be connected to the power and ground plane with a low inductance connection (short, wide
traces connecting component pad to plane).
The bulk bypass capacitor(s) should have good high frequency characteristics. A capacitor with low ESR (Equivalent Series
Resistance) should be used. It should be located close to the source of +3.3V (output pin of regulator or connector pin for
off board regulators). The following minimum values are recommended:
Low ESR Tantalum – 100uF
Low ESR Aluminum Electrolytic – 600uF
Local high frequency 0bypass should also be implemented. Capacitors should be located on all four sides of the chip
close to the VDD/VSS pins. Three caps per side are recommended (12 to tal). Additional capacitors (x6) should be
distributed evenly around the board area.
The following capacitor is recommended for local bypass:
Ceramic X7R Dielectric - 0.01uF
For a slight improvement in high frequency impedance of the bypass capacitors, two capacitors in parallel can be used for
Local Bypass. The paired caps must be located as close as possible to each other. The following values are
recommended for the capacitor pairs:
Ceramic X7R Dielectric - 0.1uF
Ceramic X7R Dielectric – 1000pF
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