IDT72V3622L10PF datasheet(7/29 Pages) IDT

Part #	IDT72V3622L10PF

Description	3.3 VOLT CMOS SyncBiFIFO 256 x 36 x 2 512 x 36 x 2 1,024 x 36 x 2

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Manufacturer	IDT [Integrated Device Technology]

Direct Link	http://www.idt.com

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COMMERCIAL TEMPERATURERANGE

IDT72V3622/72V3632/72V3642 CMOS 3.3V SyncBiFIFOTM

256 x 36 x 2, 512 x 36 x 2, 1,024 x 36 x 2

DETERMINING ACTIVE CURRENT CONSUMPTION AND POWER DISSIPATION

The ICC(f) current for the graph in Figure 1 was taken while simultaneously reading and writing a FIFO on the IDT72V3622/72V3632/72V3642 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 and the number of these device's

inputs driven by TTL HIGH levels are 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 these FIFOs may be calculated by:

PT = VCC x ICC(f) +

Σ(CL x VCC2 X fo)

N

where:

N

=

number of outputs = 36

CL

=

output capacitance load

fo

=

switching frequency of an output

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

fdata = 1/2 fS

TA = 25οC

CL = 0 pF

VCC = 3.0V

VCC = 3.6V

4660 drw 03a

175

200

80

90

100

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IDT72V3622L10PF Datasheet(PDF) 7 Page - Integrated Device Technology

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