XC3S50A Xilinx Corp., XC3S50A Datasheet - Page 20

• Manufacturer Part Number: XC3S50A
• Description: Spartan-3a Fpga Family Data Sheet
• Manufacturer: Xilinx Corp.

DC and Switching Characteristics
External Termination Requirements for Differential I/O
LVDS, RSDS, MINI_LVDS, and PPDS I/O Standards
BLVDS_25 I/O Standard
TMDS_33 I/O Standard
20
Figure 6: External Input Termination for LVDS, RSDS, MINI_LVDS, and PPDS I/O Standards
V
V
LVDS_33,
MINI_LVDS_33,
RSDS_33,
PPDS_33
LVDS_33,
MINI_LVDS_33,
RSDS_33,
PPDS_33
CCO
CCO
= 3.3V
= 3.3V
Figure 8: External Input Resistors Required for TMDS_33 I/O Standard
Figure 7: External Termination Resistors for BLVDS_25 I/O Standard
V
Any Bank
CCO
BLVDS_25
Bank 0
Bank 2
V
V
LVDS_25,
MINI_LVDS_25,
RSDS_25,
PPDS_25
LVDS_25,
MINI_LVDS_25,
RSDS_25,
PPDS_25
a) Input-only differential pairs or pairs not using DIFF_TERM=Yes constraint
b) Differential pairs using DIFF_TERM=Yes constraint
CCO
CCO
= 2.5V
= 2.5V
= 2.5V
Bank 0 and 2
Bank 0 and 2
165Ω
165Ω
V
1 4
CAT16-LV4F12
/ th of Bourns
Part Number
CCO
Bank 0
Bank 2
TMDS_33
Bank 0
Bank 2
= 3.3V
140Ω
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DVI/HDMI cable
Z
Z
Z
Z
0
0
0
0
Z
Z
= 50Ω
= 50Ω
0
0
= 50Ω
= 50Ω
= 50Ω
= 50Ω
50Ω
1 4
CAT16-PT4F4
/ th of Bourns
Part Number
1 4
CAT16-PT4F4
/ th of Bourns
Part Number
3.3V
100Ω
100Ω
DIFF_TERM=No
50Ω
DIFF_TERM=Yes
Any Bank
V
BLVDS_25
No V
Any Bank
TMDS_33
Any Bank
CCAUX
R
DS529-3_08_020107
Bank 0
Bank 2
DT
Bank 0
Bank 2
Bank 0
Bank 2
CCO
= 3.3V
V
LVDS_33,
MINI_LVDS_33,
RSDS_33,
PPDS_33
CCO
Requirement
DS529-3_07_020107
No V
RSDS_33, RSDS_25,
PPDS_33, PPDS_25
LVDS_33, LVDS_25,
MINI_LVDS_33,
MINI_LVDS_25,
= 3.3V
CCO
Restrictions
DS529-3 (v1.5) July 10, 2007
DS529-3_09_020107
V
LVDS_25,
MINI_LVDS_25,
RSDS_25,
PPDS_25
CCO
= 2.5V
Product Specification
R