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| 型號(hào)： | OR3T125-4BC432I |
| 元件分類： | FPGA |
| 英文描述： | FPGA, 784 CLBS, 92000 GATES, 80 MHz, PBGA432 |
| 封裝： | BGA-432 |
| 文件頁(yè)數(shù)： | 47/210頁(yè) |
| 文件大?。?/td> | 2138K |
| 代理商： | OR3T125-4BC432I |
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Preliminary Data Sheet, Rev. 1
ORCA Series 3 FPGAs
September 1998
140
Lucent Technologies Inc.
Estimating Power Dissipation (continued)
OR3Txxx (Advance Information)
The total operating power dissipated is estimated by
summing the standby (IDDSB), internal, and external
power dissipated. The internal and external power is
the power consumed in the PLCs and PICs, respec-
tively. In general, the standby power is small and may
be neglected. The total operating power is as follows:
PT =
Σ PPLC + Σ PPIC
The internal operating power is made up of two parts:
clock generation and PFU output power. The PFU out-
put power can be estimated based upon the number of
PFU outputs switching when driving an average fan-
out of two:
PPFU = 0.068 mW/MHz
For each PFU output that switches, 0.068 mW/MHz
needs to be multiplied times the frequency (in MHz)
that the output switches. Generally, this can be esti-
mated by using one-half the clock rate, multiplied by
some activity factor; for example, 20%.
The power dissipated by the clock generation circuitry
is based upon four parts: the fixed clock power, the
power/clock branch row or column, the clock power
dissipated in each PFU that uses this particular clock,
and the power from the subset of those PFUs config-
ured as synchronous memory. Therefore, the clock
power can be calculated for the four parts using the fol-
lowing equations.
OR3T55 Clock Power
P
= [0.88 mW/MHz
+ (0.102 mW/MHz/Branch) (# Branches)
+ (0.015 mW/MHz/PFU) (# PFUs)
+ (0.004 mW/MHz/PIO (# PIOs)]
For a quick estimate, the worst-case (typical circuit)
OR3T55 clock power
≈ 6.58 mW/MHz.
OR3T80 Clock Power
P
= [0.107 mW/MHz
+ (0.124 mW/MHz/Branch) (# Branches)
+ (0.015 mW/MHz/PFU) (# PFUs)
+ (0.004 mW/MHz/PIO (# PIOs)]
For a quick estimate, the worst-case (typical circuit)
OR3T80 Clock Power
≈ 9.47 mW/MHz.
OR3T125 Clock Power
P
= [0.167 mW/MHz
+ (0.193 mW/MHz/Branch) (# Branches)
+ (0.015 mW/MHz/PFU) (# PFUs)
+ (0.004 mW/MHz/PIO (# PIOs)]
For a quick estimate, the worst-case (typical circuit)
OR3T80 clock power
≈ 15.44 mW/MHz.
The power dissipated in a PIC is the sum of the power
dissipated in the four PIOs in the PIC. This consists of
power dissipated by inputs and ac power dissipated by
outputs. The power dissipated in each PIO depends on
whether it is configured as an input, output, or input/
output. If a PIO is operating as an output, then there is
a power dissipation component for PIN, as well as
POUT. This is because the output feeds back to the
input.
The power dissipated by an input buffer (VIH = VDD –
0.3 V or higher) is estimated as:
PIN = 0.09 mW/MHz
The ac power dissipation from an output or bidirec-
tional is estimated by the following:
POUT = (CL + 8.8 pF) x VDD2 x F Watts
where the unit for CL is farads, and the unit for F is Hz.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| OR3T80-4BC432I | FPGA, 484 CLBS, 58000 GATES, 80 MHz, PBGA432 |
| OR3C80-4BC600I | FPGA, 484 CLBS, 58000 GATES, 80 MHz, PBGA600 |
| OR3C80-5BC600I | FPGA, 484 CLBS, 58000 GATES, 80 MHz, PBGA600 |
| OR3T125-4BC600I | FPGA, 784 CLBS, 92000 GATES, 80 MHz, PBGA600 |
| OR3T80-4BC600I | FPGA, 484 CLBS, 58000 GATES, 80 MHz, PBGA600 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| OR3T125-4BC600I | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Field Programmable Gate Array (FPGA) |
| OR3T125-4PS208I | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Field Programmable Gate Array (FPGA) |
| OR3T125-4PS240I | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Field Programmable Gate Array (FPGA) |
| OR3T125-5BA352 | 制造商:AGERE 制造商全稱:AGERE 功能描述:3C and 3T Field-Programmable Gate Arrays |
| OR3T125-5BA352I | 制造商:AGERE 制造商全稱:AGERE 功能描述:3C and 3T Field-Programmable Gate Arrays |
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