Table 1 summarizes the DC specifications of the GTY transceivers in Artix UltraScale+ FPGAs. Consult the UltraScale Architecture GTY Transceivers User Guide (UG578) for further details.
Symbol | DC Parameter | Conditions | Min | Typ | Max | Units |
---|---|---|---|---|---|---|
DVPPIN | Differential peak-to-peak input voltage (external AC coupled) | >10.3125 Gb/s | 150 | – | 1250 | mV |
6.6 Gb/s to 10.3125 Gb/s | 150 | – | 1250 | mV | ||
≤ 6.6 Gb/s | 150 | – | 2000 | mV | ||
VIN | Single-ended input voltage. Voltage measured at the pin referenced to GND. | DC coupled VMGTAVTT = 1.2V | –400 | – | VMGTAVTT | mV |
VCMIN | Common mode input voltage | DC coupled VMGTAVTT = 1.2V | – | 2/3 VMGTAVTT | – | mV |
DVPPOUT | Differential peak-to-peak output voltage 1 | Transmitter output swing is set to 11111
|
800 | – | – | mV |
VCMOUTDC | Common mode output voltage: DC coupled (equation based) | When remote RX is terminated to GND | VMGTAVTT/2 – DVPPOUT/4 | mV | ||
When remote RX termination is floating | VMGTAVTT – DVPPOUT/2 | mV | ||||
When remote RX is terminated to VRX_TERM 2 | mV | |||||
VCMOUTAC | Common mode output voltage: AC coupled | Equation based | VMGTAVTT – DVPPOUT/2 | mV | ||
RIN | Differential input resistance | – | 100 | – | Ω | |
ROUT | Differential output resistance | – | 100 | – | Ω | |
TOSKEW | Transmitter output pair (TXP and TXN) intra-pair skew | – | – | 10 | ps | |
CEXT | Recommended external AC coupling capacitor 3 | – | 100 | – | nF | |
|
Figure 1. Single-Ended Peak-to-Peak Voltage
Figure 2. Differential Peak-to-Peak Voltage
The following tables summarize the DC specifications of the clock input/output levels of the GTY transceivers in Artix UltraScale+ FPGAs. Consult the UltraScale Architecture GTY Transceivers User Guide (UG578) for further details.
Symbol | DC Parameter | Min | Typ | Max | Units |
---|---|---|---|---|---|
VIDIFF | Differential peak-to-peak input voltage | 250 | – | 2000 | mV |
RIN | Differential input resistance | – | 100 | – | Ω |
CEXT | Required external AC coupling capacitor | – | 10 | – | nF |
Symbol | Description | Conditions | Min | Typ | Max | Units |
---|---|---|---|---|---|---|
VOL | Output Low voltage for P and N | RT = 100Ω across P and N signals | 100 | – | 330 | mV |
VOH | Output High voltage for P and N | RT = 100Ω across P and N signals | 500 | – | 700 | mV |
VDDOUT | Differential output voltage (P–N), P = High (N–P), N = High | RT = 100Ω across P and N signals | 300 | – | 430 | mV |
VCMOUT | Common mode voltage | RT = 100Ω across P and N signals | 300 | – | 500 | mV |