ISPLSI 5256VE-80LT100I LATTICE SEMICONDUCTOR, ISPLSI 5256VE-80LT100I Datasheet - Page 18

• Manufacturer Part Number: ISPLSI 5256VE-80LT100I
• Description: CPLD ispLSI® 5000VE Family 12K Gates 256 Macro Cells 80MHz EECMOS Technology 3.3V 100-Pin TQFP
• Manufacturer: LATTICE SEMICONDUCTOR

Specifications of ISPLSI 5256VE-80LT100I

• Package: 100TQFP
• Family Name: ispLSI® 5000VE
• Device System Gates: 12000
• Number Of Macro Cells: 256
• Maximum Propagation Delay Time: 15 ns
• Number Of User I/os: 72
• Number Of Logic Blocks/elements: 8
• Typical Operating Supply Voltage: 3.3 V
• Maximum Operating Frequency: 80 MHz
• Number Of Product Terms Per Macro: 35
• Operating Temperature: -40 to 85 °C

Power consumption in the ispLSI 5256VE 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 5256VE using the following equation:
High Speed Mode: ICC = 21 + (# of PTs * 0.313) + (# of nets * Fmax * 0.00282)
Low Power Mode: ICC = 21 + (# of PTs * 0.258) + (# of nets * Fmax * 0.00282)
# 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
300
275
250
225
200
175
150
0
25
Notes: Configuration of 16 16-bit Counters
50
Typical Current at 3.3V, 25° C
75
f
max (MHz)
100
18
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 5256VE
High Speed Mode
Specifications ispLSI 5256VE
ispLSI 5256VE
Low Power Mode
125
150
175
200
0127/5256VE