3.3 VOLT HIGH DENSITY CMOS
SUPERSYNC FIFO™
131,072 x 18
262,144 x 18
.EATURES:
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IDT72V295
IDT72V2105
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Choose among the following memory organizations:
IDT72V295
131,072 x 18
IDT72V2105
262,144 x 18
Pin-compatible with the IDT72V255/72V265 and the IDT72V275/
72V285 SuperSync FIFOs
10ns read/write cycle time (6.5ns access time)
Fixed, low first word data latency time
5V input tolerant
Auto power down minimizes standby power consumption
Master Reset clears entire FIFO
Partial Reset clears data, but retains programmable settings
Retransmit operation with fixed, low first word data latency time
Empty, Full and Half-Full flags signal FIFO status
Programmable Almost-Empty and Almost-Full flags, each flag can
default to one of two preselected offsets
Program partial flags by either serial or parallel means
Select IDT Standard timing (using
EF
and
FF
flags) or First Word
Fall Through timing (using
OR
and
IR
flags)
Output enable puts data outputs into high impedance state
Easily expandable in depth and width
Independent Read and Write clocks (permit reading and writing
simultaneously)
Available in the 64-pin Thin Quad Flat Pack (TQFP)
High-performance submicron CMOS technology
DESCRIPTION:
The IDT72V295/72V2105 are exceptionally deep, high speed, CMOS
First-In-First-Out (FIFO) memories with clocked read and write controls. These
FIFOs offer numerous improvements over previous SuperSync FIFOs, includ-
ing the following:
• The limitation of the frequency of one clock input with respect to the other
has been removed. The Frequency Select pin (FS) has been removed,
.UNCTIONAL BLOCK DIAGRAM
WEN
WCLK
D
0
-D
17
LD SEN
INPUT REGISTER
OFFSET REGISTER
FF/IR
PAF
EF/OR
PAE
HF
FWFT/SI
WRITE CONTROL
LOGIC
RAM ARRAY
131,072 x 18
262,144 x 18
FLAG
LOGIC
WRITE POINTER
READ POINTER
OUTPUT REGISTER
MRS
PRS
READ
CONTROL
LOGIC
RT
RESET
LOGIC
RCLK
REN
OE
Q
0
-Q
17
4668 drw 01
The SuperSync FIFO is a trademark and the IDT logo is a registered trademark of Integrated Device Technology, Inc.
COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES
1
2001
Integrated Device Technology, Inc.
MARCH 2001
DSC-4668/2
IDT [ INTEGRATED DEVICE TECHNOLOGY ]
