3.3 VOLT CMOS SuperSync FIFO™
16,384 x 9
32,768 x 9
IDT72V261LA
IDT72V271LA
FEATURES:
• Program partial flags by either serial or parallel means
• Choose among the following memory organizations:
• 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)
IDT72V261LA
IDT72V271LA
—
—
16,384 x 9
32,768 x 9
• Pin-compatible with the IDT72V281/72V291 and IDT72V2101/
72V2111SuperSync FIFOs
• Functionally compatible with the 5 Volt IDT72261/72271 family
• 10ns read/write cycle time (6.5ns access time)
• Fixed, low first word data latency time
• Available in the 64-pin Thin Quad Flat Pack (TQFP) and the 64-
pin Slim Thin Quad Flat Pack (STQFP)
• 5V input tolerant
• Auto power down minimizes standby power consumption
• Master Reset clears entire FIFO
• High-performance submicron CMOS technology
• Industrial temperature range (–40°C to +85°C) is available
• 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
DESCRIPTION:
The IDT72V261LA/72V271LA are functionally compatible versions of
the IDT72261/72271 designed to run off a 3.3V supply for very low power
consumption. The IDT72V261LA/72V271LA are exceptionally deep, high
speed, CMOS First-In-First-Out (FIFO) memories with clocked read and
FUNCTIONAL BLOCK DIAGRAM
D0 -D8
WEN
WCLK
LD
SEN
OFFSET REGISTER
INPUT REGISTER
FF/IR
PAF
EF/OR
PAE
FLAG
LOGIC
WRITE CONTROL
LOGIC
HF
FWFT/SI
RAM ARRAY
16,384 x 9
32,768 x 9
WRITE POINTER
READ POINTER
READ
CONTROL
LOGIC
RT
OUTPUT REGISTER
MRS
PRS
RESET
LOGIC
RCLK
REN
Q0 -Q8
4673 drw 01
OE
IDTandtheIDTlogoareregisteredtrademarksofIntegratedDeviceTechnology,Inc.TheSuperSyncisatrademarkofIntegratedDeviceTechnology,Inc.
COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES
APRIL 2002
1
2002 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice.
DSC-4673/2