DS152 Datasheet, PDF (17/56 Pages) Xilinx, Inc – DC and Switching Characteristics

Virtex-6 FPGA Data Sheet: DC and Switching Characteristics
GTH Transceiver DC Input and Output Levels
Table 30 summarizes the DC output specifications of the GTH transceivers in Virtex-6 FPGAs. Consult the Virtex-6 FPGA
GTH Transceivers User Guide for further details.
Table 30: GTH Transceiver DC Specifications
Symbol
DC Parameter
Conditions
Min
Typ
Max Units
D_VPPIN
Differential peak-to-peak input voltage External AC coupled
mV
D_VPPOUT
Differential peak-to-peak output
voltage ⁽¹⁾
Transmitter output swing is set to
maximum setting
mV
R_IN
R_OUT
T_OSKEW
C_EXT
Differential input resistance
Differential output resistance
Transmitter output pair (TXP and TXN) intra-pair skew
Recommended external AC coupling capacitor⁽²⁾
100
Ω
100
Ω
ps
100
nF
Notes:
1. The output swing and preemphasis levels are programmable using the attributes discussed in the Virtex-6 FPGA GTH Transceivers User
Guide and can result in values lower than reported in this table.
2. Other values can be used as appropriate to conform to specific protocols and standards.
Table 31 summarizes the DC specifications of the clock input of the GTH transceiver. Consult theVirtex-6 FPGA GTH
Transceivers User Guide for further details.
Table 31: GTH Transceiver Clock DC Input Level Specification
Symbol
DC Parameter
Conditions
V_IDIFF
Differential peak-to-peak input voltage
≤ 600 MHz
> 600 MHz
R_IN
C_EXT
Differential input resistance
Required external AC coupling capacitor
Min
Typ
Max Units
500
1600
mV
600
1600
mV
100
Ω
100
nF
DS152 (v2.10) October18, 2010
www.xilinx.com
Advance Product Specification
17