IDT72251 IDT [Integrated Device Technology], IDT72251 Datasheet - Page 17

• Manufacturer Part Number: IDT72251
• Description: CMOS SyncFIFOO 8192 X 9
• Manufacturer: IDT [Integrated Device Technology]

IDT72251 CMOS SyncFIFO
8192 x 9
DEPTH EXPANSION - The IDT72251 can be adapted to
applications when the requirements are for greater than 8192
words. The existence of two enable pins on the read and write
port allow depth expansion. The Write Enable 2/Load pin is
used as a second write enable in a depth expansion configu-
ration thus the Programmable flags are set to the default
values. Depth expansion is possible by using one enable
input for system control while the other enable input is con-
trolled by expansion logic to direct the flow of data. A typical
application would have the expansion logic alternate data
ORDERING INFORMATION
IDT
Device Type
XXXXX
Power
X
Speed
XX
Package
X
Temperature
Process/
Range
5.14
X
access from one device to the next in a sequential manner.
The IDT72251 operates in the Depth Expansion configuration
when the following conditions are met:
1. The WEN2/
2. External logic is used to control the flow of data.
IDT'S SYNCHRONOUS FIFOs USING THE RING COUNTER
APPROACH" for details of this configuration.
Please see the Application Note" DEPTH EXPANSION OF
operates a second Write Enable.
BLANK
J
15
20
25
35
L
72251
LD
pin is held HIGH during Reset so that this pin
Commercial (0 C to +70 C)
Plastic Leaded Chip Carrier (PLCC)
Com'l. Only
Low Power
8192 x 9 Synchronous FIFO
COMMERCIAL TEMPERATURE RANGES
Clock Cycle
Time (t
Speed in ns
CLK
3545a drw 18
)
17