參數(shù)資料
型號: DS32512+
廠商: Maxim Integrated Products
文件頁數(shù): 51/130頁
文件大?。?/td> 0K
描述: IC LIU DS3/E3/STS-1 484-BGA
產(chǎn)品培訓模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝: 30
類型: 線路接口裝置(LIU)
規(guī)程: DS3
電源電壓: 3.135 V ~ 3.465 V
安裝類型: 表面貼裝
封裝/外殼: 484-BGA
供應商設備封裝: 484-BGA(23x23)
包裝: 管件
DS32506/DS32508/DS32512
27 of 130
Figure 8-1. DS3 Waveform Template
-0.5
-0.2
Time (UI)
00.5
1.0
1.5
-1.0
0.8
1.0
1.2
0
0.2
Nor
m
ali
ze
dA
m
plit
ude
0.4
0.6
-0.75
-0.25
0.25
0.75
1.25
2nd Rise
1st Rise
1st Fall
2nd Fall
Table 8-2. DS3 Waveform Equations
TIME (IN UNIT INTERVALS)
NORMALIZED AMPLITUDE EQUATION
UPPER CURVE
-0.85
≤ T ≤ -0.68
0.03
-0.68
≤ T ≤ +0.36
0.5 {1 + sin[(
π / 2)(1 + T / 0.34)]} + 0.03
0.36
≤ T ≤ 1.4
0.08 + 0.407e
-1.84(T - 0.36)
LOWER CURVE
-0.85
≤ T ≤ -0.36
-0.03
-0.36
≤ T ≤ +0.36
0.5 {1 + sin[(
π / 2)(1 + T / 0.18)]} - 0.03
0.36
≤ T ≤ 1.4
-0.03
Table 8-3. DS3 Waveform Test Parameters and Limits
PARAMETER
SPECIFICATION
Rate
44.736Mbps (
±20ppm)
Line Code
B3ZS
Transmission Medium
Coaxial cable (AT&T 734A or equivalent)
Test Measurement Point
At the end of 0 to 450ft of coaxial cable
Test Termination
75
Ω (±1%) resistive
Pulse Amplitude
Between 0.36V and 0.85V
Pulse Shape
An isolated pulse (preceded by two zeros and followed by
one zero) falls within the curves listed in Table 8-2.
Unframed All-Ones Power Level at 22.368MHz
Between -1.8dBm and +5.7dBm
Unframed All-Ones Power Level at 44.736MHz
At least 20dB less than the power at 22.368MHz
Pulse Imbalance of Isolated Pulses
Ratio of positive and negative pulses must be between 0.90
and 1.10
DS325xx waveshape segments.
See the LIU.TWSCR register
descriptions.
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