IDT723611 Datasheet, PDF (1/20 Pages) Integrated Device Technology – CMOS SyncFIFO 64 x 36

CMOS SyncFIFO
64 x 36
IDT723611
Integrated Device Technology, Inc.
FEATURES:
• Free-running CLKA and CLKB may be asynchronous or
coincident (permits simultaneous reading and writing of
data on a single clock edge)
• 64 x 36 storage capacity
• Synchronous data buffering from Port A to Port B
• Mailbox bypass register in each direction
• Programmable Almost-Full (AF) and Almost-Empty (AE)
flags
• Microprocessor Interface Control Logic
• Full Flag (FF) and Almost-Full (AF) flags synchronized by
CLKA
• Empty Flag (EF) and Almost-Empty (AE) flags synchro-
nized by CLKB
• Passive parity checking on each Port
• Parity Generation can be selected for each Port
• Supports clock frequencies up to 67MHz
• Fast access times of 10ns
• Available in 132-pin Plastic Quad Flatpack (PQF) or
space-saving 120-pin Thin Quad Flatpack (PF)
• Low-power advanced CMOS technology
• Industrial temperature range (-40^oC to +85^oC) is avail-
able, tested to military elecrical specifications
DESCRIPTION:
The IDT723611 is a monolithic, high-speed, low-power,
CMOS Synchronous (clocked) FIFO memory which supports
clock frequencies up to 67MHz and has read access times as
fast as 10ns. The 64 x 36 dual-port FIFO buffers data from Port
A to Port B. The FIFO has flags to indicate empty and full
conditions, and two programmable flags, Almost-Full (AF) and
Almost-Empty (AE), to indicate when a selected number of
words is stored in memory. Communication between each
port can take place through two 36-bit mailbox registers. Each
FUNCTIONAL BLOCK DIAGRAM
CLKA
CSA
W/RA
ENA
MBA
Port-A
Control
Logic
RST
ODD/
EVEN
Reset
Logic
36
A0 - A35
Mail 1
Register
64 x 36
SRAM
Write Read
Pointer Pointer
Parity
Gen/Check
MBF1
PEFB
PGB
•
36
B0 - B35
FF
Status Flag
AF
Logic
EF
AE
FIFO
FS0
FS1
Programmable
Flag Offset
Registers
PGA
PEFA
MBF2
Parity
Gen/Check
Mail 2
Register
Port-B
Control
Logic
SyncFIFO is a trademark and the IDT logo is a registered trademark of Integrated Device Technology, Inc.
COMMERCIAL TEMPERATURE RANGE
©1997 Integrated Device Technology, Inc.
For latest information contact IDT's web site at www.idt.com or fax-on-demand at 408-492-8391.
CLKB
CSB
W/RB
ENB
MBB
3024 drw 01
MAY 1997
DSC-3024/4
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