9

1996 ISP Encyclopedia

Specifications ispLSI and pLSI 1016E

Power Consumption

Power Consumption in the ispLSI and pLSI 1016E device

depends 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.

80

110

0

20

40

60

80

100 120 140

Notes: Configuration of four 16-bit counters

Typical current at 5V, 25

°C

ispLSI and pLSI 1016E

100

0127B-16-80-isp/1016

ICC can be estimated for the ispLSI and pLSI 1016E using the following equation:

ICC(mA) = 23 + (# of PTs * 0.52) + (# of nets * max freq * 0.004)

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 (in MHz)

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

on average exists and the device is filled with four 16-bit counters. 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.

120

130

90

Figure 3. Typical Device Power Consumption vs fmax

Maximum GRP Delay vs GLB Loads

GLB Load

1

3

1

4

8

16

2

16E GRP/GLB.eps

ispLSI and pLSI 1016E-125

ispLSI and pLSI 1016E-100

12

ispLSI and pLSI 1016E-80