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參數(shù)資料
| 型號： | L64381 |
| 廠商： | LSI Corporation |
| 英文描述： | 4-Port Ethernet Controller(四端口以太網(wǎng)控制器) |
| 中文描述： | 4端口以太網(wǎng)控制器（四端口以太網(wǎng)控制器） |
| 文件頁數(shù)： | 87/109頁 |
| 文件大?。?/td> | 815K |
| 代理商： | L64381 |
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7-1
Chapter 7
Specifications
This chapter provides the electrical and mechanical specifications for the
L64381. This chapter is useful for hardware engineers who are intercon-
necting the L64381 with other devices and for PCB designers who are
designing a printed circuit board.
This chapter contains four sections:
Section 7.1, “AC Timing”
Section 7.2, “Electrical Requirements”
Section 7.3, “Special VDD and VSS Connections”
Section 7.4, “Packaging”
7.1
AC Timing
This section describes the AC timing characteristics of the L64381 inter-
face. During AC testing, HIGH inputs are driven at 3.0 V, and LOW inputs
are driven at 0 V. For transitions between HIGH, LOW, and invalid states,
timing measurements are made at 1.5 V, as shown in Figure 7.1. The
test load, C
L
, for each output signal is given in Table 7.1.
Figure 7.1
AC Test Load and
Waveform for
Standard Outputs
For three-state outputs, timing measurements are made from the point
at which the output turns ON or OFF. An output is ON when its voltage
is greater than 3.5 V, or less than 1.5 V. An output is OFF when its
voltage is less than V
DD
– 1.5 V, or greater than 1.5 V, as shown in
Figure 7.2.
C
L
Test
Point
Output
1.5 V
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