DS923 Datasheet, PDF (36/56 Pages) Xilinx, Inc – DC and AC Switching Characteristics

Virtex UltraScale+ FPGA Data Sheet: DC and AC Switching Characteristics
GTY Transceiver Specifications
The UltraScale Architecture and Product Overview (DS890) lists the Virtex UltraScale+ FPGAs that include
the GTY transceivers.
GTY Transceiver DC Input and Output Levels
Table 40 summarizes the DC specifications of the GTY transceivers in Virtex UltraScale+ FPGAs. Consult
www.xilinx.com/products/technology/high-speed-serial for further details.
Table 40: GTY Transceiver DC Specifications
Symbol
DC Parameter
Conditions
Min
Typ
Max Units
DV_PPIN
V_IN
Differential peak-to-peak input
voltage (external AC coupled)
Single-ended input voltage.
Voltage measured at the pin
referenced to GND.
>10.3125 Gb/s
6.6 Gb/s to 10.3125 Gb/s
≤ 6.6 Gb/s
DC coupled
V_MGTAVTT = 1.2V
–
mV
–
mV
–
mV
–
V_MGTAVTT mV
V_CMIN
Common mode input voltage
DC coupled
V_MGTAVTT = 1.2V
–
2/3 V_MGTAVTT
–
mV
D_VPPOUT
Differential peak-to-peak output Transmitter output swing
voltage⁽¹⁾
is set to 1010
–
–
mV
When remote RX is
terminated to GND
V_MGTAVTT/2 – D_VPPOUT/4
mV
V_CMOUTDC
Common mode output voltage:
DC coupled (equation based)
When remote RX
termination is floating
V_MGTAVTT – D_VPPOUT/2
mV
V_CMOUTAC
Common mode output voltage:
AC coupled
When remote RX is
terminated to V_{RX_TERM(2)}
VMGTA
V
T
T
–
D----V---P---P-4--O----U----T-
–


V----M----G----T---A---V---T---T---2-–_{---V----R---X---_---T--E---R---M--}
Equation based
V_MGTAVTT – D_VPPOUT/2
mV
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⁽³⁾
–
100
–
Ω
–
100
–
Ω
–
–
10
ps
–
100
–
nF
Notes:
1. The output swing and pre-emphasis levels are programmable using the GTY transceiver attributes discussed in the
UltraScale Architecture GTY Transceiver User Guide (UG578) and can result in values lower than reported in this table.
2. V_{RX_TERM} is the remote RX termination voltage.
3. Other values can be used as appropriate to conform to specific protocols and standards.
DS923 (v1.0) April 20, 2016
Advance Product Specification
www.xilinx.com
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