Operating Conditions
Table 6–12. 1.5-V I/O Specifications
Symbol
Parameter
Conditions
Minimum
Maximum
Units
VOL
Low-level output voltage
IOL = 2 mA (1)
0.25 × VCCIO
V
Note to Tables 6–8 through 6–12:
(1) Drive strength is programmable according to values in found in the Stratix GX Architecture chapter of the
Stratix GX Device Handbook, Volume 1.
Figures 6–1 and 6–2 show receiver input and transmitter output
waveforms, respectively, for all differential I/O standards (LVDS, 3.3-V
PCML, LVPECL, and HyperTransport technology).
Figure 6–1. Receiver Input Waveforms for Differential I/O Standards
Single-Ended Waveform
Positive Channel (p) = V
OH
V
OD
Negative Channel (n) = V
OL
V
CM
Ground
Differential Waveform
(V
OD
(Differential) = 2 x V (single-ended))
OD
V
OD
p − n = 0 V
V
OD
6–12
Stratix GX Device Handbook, Volume 1
Altera Corporation
August 2005
ALTERA [ ALTERA CORPORATION ]
