参数资料
型号: IDT72V3612L12PF
厂商: INTEGRATED DEVICE TECHNOLOGY INC
元件分类: FIFO
英文描述: 3.3 VOLT CMOS SyncBiFIFO-TM 64 x 36 x 2
中文描述: 64 X 36 BI-DIRECTIONAL FIFO, 8 ns, PQFP120
封装: TQFP-120
文件页数: 23/25页
文件大小: 240K
代理商: IDT72V3612L12PF
7
IDT72V3612 3.3V, CMOS SyncBiFIFOTM
64 x 36 x 2
COMMERCIALTEMPERATURERANGE
DETERMINING ACTIVE CURRENT CONSUMPTION AND POWER DISSIPATION
The ICC(f) current for the graph in Figure 1 was taken while simultaneously reading and writing the FIFO on the IDT72V3612 with CLKA and CLKB set to
fS. All data inputs and data outputs change state during each clock cycle to consume the highest supply current. Data outputs were disconnected to normalize
the graph to a zero-capacitance load. Once the capacitance load per data-output channel is known, the power dissipation can be calculated with the equation
below.
CALCULATING POWER DISSIPATION
With ICC(f) taken from Figure 1, the maximum power dissipation (PT) of the IDT72V3612 may be calculated by:
PT = VCC x ICC(f) +
Σ(CL x (VOH - VOL)2 x fO)
N
where:
N
=
number of outputs = 36
CL
=
output capacitance load
fo
=
switching frequency of an output
VOH
=
output HIGH level voltage
VOL
=
output LOW level voltage
When no reads or writes are occurring on this device, the power dissipated by a single clock (CLKA or CLKB) input running at frequency fS is calculated
by:
PT = VCC x fS x 0.025 mA/MHz
Figure 1. Typical Characteristics: Supply Current (ICC) vs. Clock Frequency (fS)
010
20
30
40
50
60
70
0
25
50
75
100
125
150
VCC = 3.3V
fS
Clock Frequency MHz
ICC(f)
Supply
Current
mA
fdata = 1/2 fS
TA = 25
°C
CL = 0 pF
VCC = 3.0V
4663 drw 04
VCC = 3.6V
80
90
175
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