ep1sgx25d Altera Corporation, ep1sgx25d Datasheet - Page 215

• Manufacturer Part Number: ep1sgx25d
• Description: Stratix Gx Device Family Data Sheet
• Manufacturer: Altera Corporation

Figure 6–2. Receiver Input Waveform Example with Values
Notes to
(1)
(2)
(3)
Figure 6–3. Transmitter Output Waveforms for Differential I/O Standards
Altera Corporation
June 2006
The values in this figure are for example only.
These values must meet the voltages specified in the section
If internal termination is used, the common mode is generated after the pins.
Figure
Single-Ended Waveform
Differential Waveform
Channel (p)
Channel (n)
Negative
Positive
6–2:
Ground
Single-Ended Waveform:
What is Applied
to the Pin (2)
Differential Waveform:
As Seen by the Buffer
or by Subtraction on an Oscilloscope
p - n = 0 V
V
CM
V
ID
V
ICM
Differential V
= 1.175 V (3)
V
ID
V
= 1 V
ID
ID
= 2 * V
(V ID (Differential) = 2 x V ID (single-ended))
V
ID
ID
= 1 V
(Single-Ended) = 2 V
“Operating Conditions” on page
Stratix GX Device Handbook, Volume 1
V
V
IH
ID
= 1.175 V + 0.5 V = 1.675 V
V
V
p − n = 0 V
IL
Positive Channel (p) = V
Negative Channel (n) = V
Ground
ID
= 1.175 V - 0.5 V = 0.675 V
= 1 V
DC & Switching Characteristics
6–1.
OH
OL
6–13