Clock frequencies up to 100 MHz (6.5 ns access time)
Clocked FIFO buffering data from Port A to Port B
IDT Standard timing (using
EF
and
FF)
or First Word Fall
Through Timing (using OR and IR flag functions)
Programmable Almost-Empty and Almost-Full flags; each has
five default offsets (8, 16, 64, 256 and 1,024)
Serial or parallel programming of partial flags
Port B bus sizing of 36 bits (long word), 18 bits (word) and 9 bits
(byte)
•
•
•
•
•
•
•
•
•
•
Big- or Little-Endian format for word and byte bus sizes
Retransmit Capability
Reset clears data and configures FIFO, Partial Reset clears data
but retains configuration settings
Mailbox bypass registers for each FIFO
Free-running CLKA and CLKB may be asynchronous or
coincident (simultaneous reading and writing of data on a single
clock edge is permitted)
Easily expandable in width and depth
Auto power down minimizes power dissipation
Available in a space-saving 128-pin Thin Quad Flatpack (TQFP)
Pin compatible with the lower density parts, IDT72V3623/
72V3633/72V3643/72V3653/72V3663/72V3673
Industrial temperature range (–40°C to +85°C) is available
°
°
FUNCTIONAL BLOCK DIAGRAM
MBF1
Mail 1
Register
Port-A
Control
Logic
CLKA
CSA
W/RA
ENA
MBA
RS1
RS2
PRS
Bus-
Matching
Input
Register
Output
Register
FIFO1
Mail1,
Mail2,
Reset
Logic
36
36
RAM ARRAY
36
16,384 x 36
32,768 x 36
65,536 x 36
36
RT
RTM
FIFO
Retransmit
Logic
Write
Pointer
Read
Pointer
B
0
-B
35
A
0
-A
35
FF/IR
AF
Status Flag
Logic
EF/OR
AE
36
36
FS2
FS0/SD
FS1/SEN
Programmable Flag
Offset Registers
16
Timing
Mode
Port-B
Control
Logic
Mail 2
Register
MBF2
IDT and the IDT logo are registered trademarks of Integrated Device Technology, Inc. The SyncFIFO is a trademark of Integrated Device Technology, Inc.
FWFT
CLKB
CSB
W/RB
ENB
MBB
BE
BM
SIZE
4678 drw 01
COMMERICAL TEMPERATURE RANGE
2003 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice.
NOVEMBER 2003
1
DSC-4678/2
IDT72V3683/72V3693/72V36103 3.3V CMOS SyncFIFO
TM
WITH
BUS-MATCHING 16,384 x 36, 32,768 x 36 and 65,536 x 36
COMMERCIAL TEMPERATURE RANGE
DESCRIPTION
The IDT72V3683/72V3693/72V36103 are designed to run off a 3.3V supply
for exceptionally low power consumption. These devices are monolithic, high-
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