Datasheet

Artix-7 FPGAs Data Sheet: DC and AC Switching Characteristics
DS181 (v1.21) September 27, 2016 www.xilinx.com
Product Specification 49
Note: In Figure 4, differential peak-to-peak voltage = single-ended peak-to-peak voltage x 2.
Table 51 summarizes the DC specifications of the clock input of the GTP transceiver. Consult 7 Series FPGAs GTP Transceiver
User Guide (UG482
) for further details.
V
CMOUTAC
Common mode output voltage: AC coupled 1/2 V
MGTAVTT
mV
T
OSKEW
Transmitter output pair (TXP and TXN) intra-pair skew
(FF, FB, SB packages)
– – 10 ps
Transmitter output pair (TXP and TXN) intra-pair skew
(FG, FT, CS, CP packages)
– – 12 ps
DV
PPIN
Differential peak-to-peak input
voltage
External AC coupled 150 – 2000 mV
V
IN
Single-ended input voltage
(2)
DC coupled V
MGTAVTT
= 1.2V –200 – V
MGTAVTT
mV
V
CMIN
Common mode input voltage DC coupled V
MGTAVTT
= 1.2V – 2/3 V
MGTAVTT
–mV
R
IN
Differential input resistance – 100 – Ω
C
EXT
Recommended external AC coupling capacitor
(3)
– 100 – nF
Notes:
1. The output swing and preemphasis levels are programmable using the attributes discussed in 7 Series FPGAs GTP Transceiver User Guide
(UG482
) and can result in values lower than reported in this table.
2. Voltage measured at the pin referenced to ground.
3. Other values can be used as appropriate to conform to specific protocols and standards.
X-Ref Target - Figure 3
Figure 3: Single-Ended Peak-to-Peak Voltage
X-Ref Target - Figure 4
Figure 4: Differential Peak-to-Peak Voltage
Table 51: GTP Transceiver Clock DC Input Level Specification
Symbol DC Parameter Min Typ Max Units
V
IDIFF
Differential peak-to-peak input voltage 350 – 2000 mV
R
IN
Differential input resistance – 100 – Ω
C
EXT
Required external AC coupling capacitor – 100 – nF
Table 50: GTP Transceiver DC Specifications (Cont’d)
Symbol DC Parameter Conditions Min Typ Max Units
0
+V P
N
ds181_01_062014
Single-Ended
Peak-to-Peak
Voltage
0
+V
–V
P–N
ds181_02_062014
Differential
Peak-to-Peak
Voltage