DC & Switching Characteristics
Table 4–33. Stratix Device Capacitance
Symbol
C
IOTB
C
IOLR
Parameter
Input capacitance on I/O pins in I/O banks
3, 4, 7, and 8.
Input capacitance on I/O pins in I/O banks
1, 2, 5, and 6, including high-speed
differential receiver and transmitter pins.
Input capacitance on top/bottom clock input
pins:
CLK[4:7]
and
CLK[12:15]
.
Input capacitance on left/right clock inputs:
CLK1
,
CLK3
,
CLK8
,
CLK10
.
Input capacitance on left/right clock inputs:
CLK0
,
CLK2
,
CLK9
, and
CLK11
.
Minimum
Typical
11.5
8.2
Maximum
Unit
pF
pF
C
CLKTB
C
CLKLR
C
CLKLR+
11.5
7.8
4.4
pF
pF
pF
Notes to
through
(1)
(2)
(3)
(4)
(5)
(6)
When
tx_outclock
port of
altlvds_tx
megafunction is 717 MHz, V
O D ( m i n )
= 235 mV on the output clock pin.
Pin pull-up resistance values will lower if an external source drives the pin higher than V
CCIO
.
Drive strength is programmable according to the values shown in the
Stratix Architecture
chapter of the
Stratix
Device Handbook, Volume 1.
V
REF
specifies the center point of the switching range.
Capacitance is sample-tested only. Capacitance is measured using time-domain reflections (TDR). Measurement
accuracy is within ±0.5 pF.
V
IO
and V
CM
have multiple ranges and values for J=1 through 10.
Power
Consumption
Altera
®
offers two ways to calculate power for a design: the Altera web
power calculator and the PowerGauge
TM
feature in the Quartus
®
II
software.
The interactive power calculator on the Altera web site is typically used
prior to designing the FPGA in order to get a magnitude estimate of the
device power. The Quartus II software PowerGauge feature allows you to
apply test vectors against your design for more accurate power
consumption modeling.
In both cases, these calculations should only be used as an estimation of
power, not as a specification.
Stratix devices require a certain amount of power-up current to
successfully power up because of the small process geometry on which
they are fabricated.
shows the maximum power-up current (I
CCINT
) required to
power a Stratix device. This specification is for commercial operating
conditions. Measurements were performed with an isolated Stratix
device on the board to characterize the power-up current of an isolated
Altera Corporation
July 2005
4–17
Stratix Device Handbook, Volume 1
ALTERA [ ALTERA CORPORATION ]
