723631L15PF Integrated Device Technology (Idt), 723631L15PF Datasheet - Page 6

• Manufacturer Part Number: 723631L15PF
• Description: FIFO Mem Sync Dual Depth Bi-Dir 512 x 36 120-Pin TQFP
• Manufacturer: Integrated Device Technology (Idt)

Specifications of 723631L15PF

• Package: 120TQFP
• Configuration: Dual
• Bus Directional: Bi-Directional
• Density: 18 Kb
• Organization: 512x36
• Data Bus Width: 36 Bit
• Timing Type: Synchronous
• Expansion Type: Depth
• Typical Operating Supply Voltage: 5 V
• Operating Temperature: 0 to 70 °C

CALCULATING POWER DISSIPATION
to f
normalize the graph to a zero-capacitance load. Once the capacitance load per data-output channel and the number of IDT723631/723641/723651
inputs driven by TTL HIGH levels are known, the power dissipation can be calculated with the equation below.
calculated by:
IDT723631/723641/723651 CMOS SyncFIFO™
512 x 36, 1,024 x 36 and 2,048 x 36
The I
With I
where:
When no reads or writes are occurring on these devices, the power dissipated by a single clock (CLKA or CLKB) input running at frequency fS is
S
. All data inputs and data outputs change state during each clock cycle to consume the highest supply current. Data outputs were disconnected to
200
150
100
250
CC
CC
50
(f) current for the graph in Figure 1 was taken while simultaneously reading and writing the FIFO on the IDT723641 with CLKA and CLKB set
0
(f) taken from Figure 1, the maximum power dissipation (PT) of these FIFOs may be calculated by:
N
∆I
dc
C
f
O
L
CC
0
=
=
=
=
=
number of inputs driven by TTL levels
increase in power supply current for each input at a TTL HIGH level
duty cycle of inputs at a TTL HIGH level of 3.4
output capacitance load
switching frequency of an output
P
P
10
T
T
= V
= V
T
f
C
CC
CC
data
A
L
= 25°C
= 0pF
x f
x [I
Figure 1. Typical Characteristics: Supply vs Clock Frequency
= 1/2 f
S
CC(f)
x 0.209 mA/MHz
S
+ (N x ∆I
20
CC
x dc)] + Σ(C
f
S
⎯ Clock Frequency ⎯ MHz
30
V
6
L
CC
x V
= 5.0V
CC
2
x f
O
)
40
50
COMMERCIAL AND INDUSTRIAL
V
CC
= 5.5V
TEMPERATURE RANGES
60
V
CC
= 4.5V
3023 drw04
70