GTM Transceiver DC Input and Output Levels

Versal Prime Series Data Sheet: DC and AC Switching Characteristics (DS956)
Document ID
DS956
Release Date
2022-08-02
Revision
1.5 English

Table 1 summarizes the DC specifications of the GTM transceivers in Versal Prime devices. Consult the Versal ACAP GTM Transceivers Architecture Manual (AM017) for further details.

Table 1. GTM Transceiver DC Specifications
Symbol DC Parameter Conditions Min Typ Max Units
DVPPIN Differential peak-to-peak input voltage (external AC coupled) PAM4 600 – 800 mV
NRZ 150 – 900 mV
DVPPOUT Differential peak-to-peak output voltage 1 Transmitter output swing is set to 11111 800 – – mV
VCMOUTAC Common mode output voltage: AC coupled Equation based VAVCCAUX – 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
  1. The output swing and pre-emphasis levels are programmable using the GTM transceiver attributes discussed in the Versal ACAP GTM Transceivers Architecture Manual (AM017) and can result in values lower than reported in this table.
  2. VRX_TERM is the remote RX termination voltage.
  3. Other values can be used as appropriate to conform to specific protocols and standards.
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 GTM transceivers in Versal Prime devices. Consult the Versal ACAP GTM Transceivers Architecture Manual (AM017) for further details.

Table 2. GTM Transceiver Clock DC Input Level Specification
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