Specifications ispLSI 1024/883

9

Maximum GRP Delay vs GLB Loads

ispLSI 1024-60

1

2

3

4

8

12

16

GLB Loads

4

5

6

0

0126A-80-24-mil.eps

Power Consumption

Figure 3. Typical Device Power Consumption vs fmax

ICC can be estimated for the ispLSI 1024 using the following equation:

ICC = 42 + (# of PTs * 0.45) + (# of nets * Max. freq * 0.008) where:

# 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 ICC estimate is based on typical conditions (VCC = 5.0V, room temperature) and an assumption of 2 GLB loads on

average exists. These values are for estimates only. Since the value of ICC is sensitive to operating conditions and the

program in the device, the actual ICC should be verified.

50

100

150

0

1020

3040

50

60

70

80

200

Notes: Configuration of Six 16-bit Counters

Typical Current at 5V, 25˚C

ispLSI 1024

0127A-24-80-isp

Power consumption in the ispLSI 1024/883 device de-

pends on two primary factors: the speed at which the

device is operating, and the number of Product Terms

used. Figure 3 shows the relationship between power

and operating speed.