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AM79C978VC/W 데이터시트(PDF) 225 Page - Advanced Micro Devices

부품명 AM79C978VC/W
상세설명  Single-Chip 1/10 Mbps PCI Home Networking Controller
PDF  261 Pages
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제조업체  AMD [Advanced Micro Devices]
홈페이지  http://www.amd.com
Logo AMD - Advanced Micro Devices

AM79C978VC/W 데이터시트(HTML) 225 Page - Advanced Micro Devices

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Am79C978
225
SWITCHING CHARACTERISTICS: BUS INTERFACE (CONTINUED)
External Clock (XTAL) Timing Specifications
External Clock (Oscillator) Timing Specification
Figure 52.
Clock Timing
PMD Interface
PECL
Note:
1. Not included in the production test.
Figure 53.
PMD Interface Timing (PECL)
Clock Timing
No.
Symbol
Parameter Description
Min
Max
Unit
1tPER
Cycle time
49.995
50.005
ns
2tPWH
Cycle high time
0.4* Tcycle
0.6*Tcycle
ns
3tPWL
Clock low time
0.4*Tcycle
0.6*Tcycle
ns
Clock Timing
No.
Symbol
Parameter Description
Min
Max
Unit
1tPER
Cycle time
16.665
16.669
ns
2tPWH
Cycle high time
0.4* Tcycle
0.6*Tcycle
ns
3tPWL
Clock low time
0.4*Tcycle
0.6*Tcycle
ns
XCLK
1
3
2
22206B-55
No.
Symbol
Parameter Description
Test Conditions
Min
Max
Unit
160
tR (Note 1) TX+, TX- Rise Time
PECL Load
0.5
3
ns
161
tF (Note 1) TX+, TX- Fall Time
PECL Load
0.5
3
ns
162
tSK (Note 1) TX+ to TX- skew
PECL Load
--
+200
ps
163
tS
SDI setup time to XCLK high
--
7
--
ns
164
tH
SDI hold time to XCLK high
--
5
--
ns
TX+,TX–
TX+
TX–
162
161
80%
20%
160
22206B-56



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