IDT72V3611_14 Datasheet, PDF (1/19 Pages) Integrated Device Technology – 3.3 VOLT CMOS SyncFIFO

3.3 VOLT CMOS SyncFIFO^TM
64 x 36
IDT72V3611
FEATURES:
• 64 x 36 storage capacity
• Supports clock frequencies up to 67MHz
• Fast access times of 10ns
• Free-running CLKA and CLKB may be asynchronous or
coincident (permits simultaneous reading and writing of
data on a single clock edge)
• 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 synchronized by
CLKB
• Passive parity checking on each Port
• Parity Generation can be selected for each Port
FUNCTIONAL BLOCK DIAGRAM
CLKA
CSA
W/RA
ENA
MBA
Port-A
Control
Logic
RST
ODD/
EVEN
Reset
Logic
36
Mail 1
Register
RAM
ARRAY
64 x 36
• Available in space-saving 120-pin Thin Quad Flatpack (PF)
• Green parts available, see ordering information
DESCRIPTION:
The IDT72V3611 is designed to run off a 3.3V supply for exceptionally low
power consumption. This device is a monolithic, high-speed, low-power,
CMOS Synchronous (clocked) FIFO memory which supports clock frequen-
cies 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 operates in IDT Standard
mode and 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 mailbox register has a
flag to signal when new mail has been stored. Parity is checked passively on
each port and may be ignored if not desired. Parity generation can be selected
Parity
Gen/Check
MBF1
PEFB
PGB
36
A0 - A35
Write Read
Pointer Pointer
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
IDT and the IDT logo are registered trademarks of Integrated Device Technology, Inc. SyncFIFO is a trademark of Integrated Device Technology, Inc.
COMMERCIAL TEMPERATURE RANGE
1
©2014 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice.
Port-B
Control
Logic
CLKB
CSB
W/RB
ENB
MBB
4657 drw01
JANUARY 2014
DSC-4657/5