ISPLSI5384VE-100LF256I Lattice Semiconductor, ISPLSI5384VE-100LF256I Datasheet - Page 18

• Manufacturer Part Number: ISPLSI5384VE-100LF256I
• Description: Ic Pld Isp 192i/o 10ns 256fpbga
• Manufacturer: Lattice Semiconductor

Power consumption in the ispLSI 5384VE device de-
pends on two primary factors: the speed at which the
device is operating and the number of product terms
used. The product terms have a fuse-selectable speed/
power tradeoff setting. Each group of five product terms
has a single speed/power tradeoff control fuse that acts
on the complete group of five. The fast “high-speed”
Figure 10. Typical Device Power Consumption vs fmax
I CC can be estimated for the ispLSI 5384VE using the following equation:
High Speed Mode: ICC = 22 + (# of PTs * 0.314) + (# of nets * Fmax * 0.00317)
Low Power Mode: ICC = 22 + (# of PTs * 0.271) + (# of nets * Fmax * 0.00317)
# of PTs = Number of Product Terms used in design
# of nets = Number of Signals used in device
Fmax = Highest Clock Frequency to the device
The I CC estimate is based on typical conditions (V CC = 3.3V, room temperature) and an assumption of one GLB load
on average exists. These values are for estimates only. Since the value of I CC is sensitive to operating conditions
and the program in the device, the actual I CC should be verified.
Power Consumption
420
460
380
340
300
260
220
0
25
Notes: Configuration of 24 16-bit Counters
50
Typical Current at 3.3V, 25° C
75
f
max (MHz)
100
18
ispLSI 5384VE
High Speed Mode
setting operates product terms at their normal full power
consumption. For portions of the logic that can tolerate
longer propagation delays, selecting the slower “low-
power” setting will reduce the power dissipation for these
product terms. Figure 10 shows the relationship between
power and operating frequency.
ispLSI 5384VE
Low Power Mode
Specifications ispLSI 5384VE
125
150
175
200
0127/5384VE