Specifications ispLSI 3256A
Power Consumption
Power consumption in the ispLSI 3256A device depends Figure 3 shows the relationship between power and
on two primary factors: the speed at which the device is operating speed.
operating and the number of product terms used.
Figure 3. Typical Device Power Consumption vs fmax
ispLSI 3256A
400
300
200
0
10
20 30
40 50 60 70 80 90 100
fmax (MHz)
Notes: Configuration of 16 16-bit Counters
Typical Current at 5V, 25° C
I
I
can be estimated for the ispLSI 3256A using the following equation:
CC
= 40 + (# of PTs 0.31) + (# of nets Max. freq 0.0094) where:
*
*
*
CC
# of PTs = Number of Product Terms used in design
# of nets = Number of Signals used in device
Max. freq = Highest Clock Frequency to the device
The I
CC
estimate is based on typical conditions (V
GLB loads on average exists. These values are for estimates only. Since the value of I
= 5.0V, room temperature) and an assumption of two
CC
is sensitive to
CC
operating conditions and the program in the device, the actual I
should be verified.
CC
0127A-16-80-isp/3256A
10
LATTICE [ LATTICE SEMICONDUCTOR ]
