XC4VFX12-12FFG668C Xilinx Inc, XC4VFX12-12FFG668C Datasheet - Page 282
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XC4VFX12-12FFG668C
Manufacturer Part Number
XC4VFX12-12FFG668C
Description
IC FPGA VIRTEX-4 FX 12K 668FCBGA
Manufacturer
Xilinx Inc
Series
Virtex™-4r
Specifications of XC4VFX12-12FFG668C
Number Of Logic Elements/cells
12312
Number Of Labs/clbs
1368
Total Ram Bits
663552
Number Of I /o
320
Voltage - Supply
1.14 V ~ 1.26 V
Mounting Type
Surface Mount
Operating Temperature
0°C ~ 85°C
Package / Case
668-BBGA, FCBGA
For Use With
HW-V4-ML403-UNI-G - EVALUATION PLATFORM VIRTEX-4HW-AFX-FF668-400 - BOARD DEV VIRTEX 4 FF668
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Number Of Gates
-
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Chapter 6: SelectIO Resources
282
SSTL2 Class I (2.5V)
DIFF_SSTL2_II, DIFF_SSTL18_II Usage
DIFF_SSTL2_II_DCI, DIFF_SSTL18_II_DCI Usage
Differential SSTL 2.5V and 1.8V Class II pairs complementary single-ended SSTL_II type
drivers with a differential receiver. For a bidirectional link, a series resistor must be
connected to both transmitters.
Differential SSTL 2.5V and 1.8V Class II pairs complementary single-ended SSTL_II type
drivers with a differential receiver, including on-chip termination. DCI can be used for
unidirectional and bidirectional links.
Figure 6-59
Class I.
Table 6-26
Table 6-26: SSTL2 DC Voltage Specifications Class I
V
V
V
V
CCO
REF
TT
IH
= V
≥ V
External Termination
DCI
= 0.5 × V
REF
SSTL2_I_DCI
REF
lists the SSTL2 DC voltage specifications for Class I.
SSTL2_I
shows a sample circuit illustrating a valid termination technique for SSTL2
R 0 = 25
+ N
+ 0.15
CCO
(1)
Ω
IOB
IOB
Figure 6-59: SSTL2 Class I Termination
R S = 25Ω
www.xilinx.com
Z 0
Z 0
Z 0
R P = Z 0 = 50Ω
V
TT
V
IOB
CCO
= 1.25V
= 2.5V
2R
2R
VRP
VRN
Min
1.13
1.09
1.28
2.3
IOB
= 2Z 0 = 100Ω
= 2Z 0 = 100Ω
V
V
REF
REF
UG070 (v2.6) December 1, 2008
= 1.25V
= 1.25V
Virtex-4 FPGA User Guide
Typ
1.25
1.25
2.5
1.4
SSTL2_I_DCI
SSTL2_I
ug070_6_57_071904
+
+
3.0
Max
1.38
1.42
2.7
(2)
R
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