Specifications ispLSI 3192

10

Power Consumption

operating and the number of product terms used. Figure

3 shows the relationship between power and operating

speed.

Power Consumption in the ispLSI 3192 device depends

on two primary factors: the speed at which the device is

240

440

640

540

340

010

20

3040

50

6070

Notes: Configuration of 16 16-bit Counters

Typical Current at 5V, 25° C

ispLSI 3192

0127/3192

ICC can be estimated for the ispLSI 3192 using the following equation:

ICC = 50 + (# of PTs * 0.65) + (# of nets * Max. freq * 0.015) 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.

80

90

100

Figure 3. Typical Device Power Consumption vs fmax

Package Thermal Characteristics

For the ispLSI 3192-100LB272, it is strongly recom-

mended that the actual Icc be verified to ensure that the

is not exceeded. Depending on the specific logic design

and clock speed, airflow may be required to satisfy the

tion. Please refer to the Thermal Management section of

the Lattice Semiconductor Data Book or CD-ROM for