參數(shù)資料
型號: IDT72103L35J
廠商: INTEGRATED DEVICE TECHNOLOGY INC
元件分類: DRAM
英文描述: CMOS PARALLEL-SERIAL FIFO 2048 x 9, 4096 x 9
中文描述: 2K X 9 OTHER FIFO, 35 ns, PQCC44
封裝: PLASTIC, LCC-44
文件頁數(shù): 19/31頁
文件大小: 314K
代理商: IDT72103L35J
IDT72103, IDT72104
CMOS PARALLEL-SERIAL FIFO 2048 x 9 AND 4096 x 9
COMMERCIAL TEMPERATURE RANGES
5.37
19
enable and disable timings for
OE
are shown in Figure 12.
Single Device Mode
A single IDT172103/72104 may be used when application
requirements are for 2048/4096 words or less. The IDT72103/
72104 is in the Single Device Configuration when the Expan-
sion In (
Xl
) control input is grounded (See Figure 27). In this
mode, the
HF/XO
is used as a Half-Full flag.
Wldth Expanslon Mode
Word width may be increased simply by connecting the
corresponding input control signals of multiple devices. Sta-
tus flags can be detected from any one of the connected
devices. Figure 28 demonstrates an 18-bit word width by
using two IDT72103/72104s. Any word width can be attained
by adding additional IDT72103/72104.
OPERATING DESCRIPTION
PARALLEL OPERATING MODES:
Parallel Data Input
By setting
SI
/PI HIGH, data is written into the FIFO in
parallel through the D0-D8 input data lines.
Parallel Data Output
By setting
SO
/PO HIGH, the parallel-out mode is chosen.
In the parallel-out mode, as shown in Figure 4, data is
available tA after the falling edge of
R
and the output bus Q
goes into high-impedance after
R
goes HIGH.
Alternately, the user can access the FIFO by keeping
R
LOW and enabling data on the bus by asserting
OE
. When
R
is LOW, the
OE
is HIGH and the output bus is tri-stated. When
R
is HIGH, the output bus is disabled irrespective of
OE
. The
Figure 27. Block Diagram of Single 2048 x 9/4096 x 9 FIFO in Parallel Mode
2573 drw 30
IDT
72103/04
DATA
WRITE
FULL FLAG
FULL-MINUS-ONE
(W)
(D)
(FF)
(FF-1)
9
DATA
READ
EMPTY FLAG
EMPTY-PLUS-ONE
(R)
(Q)
(EF)
(EF+1)
9
HF
HALF-FULL FLAG
EXPANSION IN (XI)
OUT
IN
ALMOST FULL
(AEF)
RESET
(RS)
ALMOST EMPTY
(AEF)
RETRANSMIT
(RT)
OUPUT ENABLE
(OE)
(SI/PI)
(SO/PO)
V
CC
V
CC
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