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參數(shù)資料
| 型號(hào)： | VSC838UG |
| 廠商： | VITESSE SEMICONDUCTOR CORP |
| 元件分類： | 數(shù)字信號(hào)處理外設(shè) |
| 英文描述： | RECTIFIER BRIDGE 25A 200V 300A-ifsm 1.1V-vf 5uA-ir GBPC 100/TRAY |
| 中文描述： | 36-BIT, DSP-CROSSBAR SWITCH, PBGA480 |
| 封裝： | 37.50 X 37.50 MM, TBGA-480 |
| 文件頁數(shù)： | 9/20頁 |
| 文件大?。?/td> | 296K |
| 代理商： | VSC838UG |
VITESSE
Preliminary Data Sheet
VSC838
3.2Gb/s
36x37 Crosspoint Switch
G52351-0, Rev 3.0
02/12/01
Page 9
VITESSE
SEMICONDUCTOR CORPORATION
741 Calle Plano
Camarillo, CA 93012
Tel: (800) VITESSE
FAX: (805) 987-5896
Email: prodinfo@vitesse.com
Internet: www.vitesse.com
I/O Equivalent Circuits
Input Termination
The high-speed inputs of the VSC838 are internally terminated by a 100
impedance between true and
complement inputs. Termination resistors are isolated from each other on-chip. The termination will self-bias to
+2.0V (nominal) for AC-coupled applications. The ITC pin enables direct interconnection of multiple VSC838
devices. With ITC tied to V
CC
, the center point of the 100
termination impedance is tied to V
CC
, causing the
terminations to act as loads for an open-drain or open-collector differential output.
Table 7: Allowed Input Termination Schemes
Some allowed termination schemes result in additional I
CC
current and power dissipation on-chip. See
Table 8.
Table 8: Additional Current and Power
Type
Description
Comments
1
AC-coupled input
Tie ITC LOW, 100
differential input termination,
input self-biased
Tie ITC HIGH, terminations acts as 50
load to V
CC
Tie ITC HIGH, terminations acts as 50
load to V
CC
Tie ITC LOW, 100
differential termination
(preferred over Type 3)
Tie ITC LOW, 100
differential termination
2
3
DC-coupled from open-drain CML
DC-coupled from back-terminated 2.5V CML
4
DC-coupled from back-terminated 2.5V CML
5
DC-coupled from back-terminated 3.3V LV-PECL
Parameter
Description
Min
Typ
Max
Units
Conditions
I
CC-C
Additional ICC current when receiving DC-
Coupled CML (ITC = HIGH)
Additional power dissipated on-chip for
DC terminating CML at inputs
180
mA
P
CC-C
0.180
W
PAD
PAD
50
50
H/S Input Equivalent Circuit
H/S Output Equivalent Circuit
PAD
PAD
50
50
VCC
ITC
TERM_CTRL
DRIVE_CTRL
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