HC4GX15 Datasheet, PDF (327/668 Pages) Altera Corporation – HardCopy IV Device Handbook

Chapter 1: HardCopy IV GX Transceiver Architecture
1–63
Receiver Channel Datapath
Figure 1–50 shows a typical HardCopy IV GX transmitter (PCML) to
HardCopy IV GX Receiver (PCML) DC-coupled link.
Figure 1–50. HardCopy IV GX Transmitter (PCML) to HardCopy IV GX Receiver (PCML)
V_CCH = 1.4 V/1.5 V
HardCopy IV GX
Transmitter
Physical Medium
Physical Medium
HardCopy IV GX
Receiver
42.5/50/60/75-Ω
TX Termination
42.5/50/60/75-Ω 42.5/50/60/75-Ω
TX Termination RX Termination
42.5/50/60/75-Ω
RX Termination
TX
V_CM ^{0.65 V}
R_s (1)
RX
V_CM ^{0.82 V}
Note to Figure 1–50:
(1) R_S is the parasitic resistance present in the on-chip RX termination and biasing circuitry.
Table 1–13 shows the allowed transmitter and receiver settings in a HardCopy IV GX
transmitter (PCML) to HardCopy IV GX receiver (PCML) DC-coupled link.
Table 1–13. Settings for a HardCopy IV GX Transmitter (PCML) to HardCopy IV GX Receiver (PCML) DC-Coupled Link
Transmitter (HardCopy IV GX) Settings
Receiver (HardCopy IV GX) Settings
Data Rate
VCCH (1) TX VCM
Differential
Termination
Data Rate RX VCM
Differential
Termination
600 - 6500 Mbps 1.4 V/1.5 V 0.65 V 85/100/120/150-Ω 600 - 6500 Mbps 0.82 V 85/100/120/150-Ω
Note to Table 1–13:
(1) V_CCH = 1.5 V can support data rates from 600 Mbps to 4250 Mbps. V_CCH = 1.4 V can support data rates from 600 Mbps to 6500 Mbps.
© June 2009 Altera Corporation
HardCopy IV Device Handbook Volume 3