IDT72V3612 Datasheet, PDF (1/25 Pages) Integrated Device Technology – 3.3 VOLT CMOS SyncBiFIFO-TM 64 x 36 x 2

3.3 VOLT CMOS SyncBiFIFO^TM
64 x 36 x 2
IDT72V3612
FEATURES:
• Two independent clocked FIFOs (64 x 36 storage capacity each)
buffering data in opposite directions
• Supports clock frequencies up to 83 MHz
• Fast access times of 8ns
• Free-running CLKA and CLKB can be asynchronous or
coincident (simultaneous reading and writing of data on a
single clock edge is permitted)
• Mailbox bypass Register for each FIFO
• Programmable Almost-Full and Almost-Empty Flags
• Microprocessor interface control logic
• EFA , FFA , AEA , and AFA flags synchronized by CLKA
• EFB , FFB , AEB , and AFB flags synchronized by CLKB
• Passive parity checking on each port
• Parity generation can be selected for each port
• Available in 132-pin plastic quad flat package (PQF), or space
saving 120-pin thin quad flat package (TQFP)
• Pin and functionally compatible version of the 5V operating
IDT723612
• Industrial temperature range (–40°C +85°C) is available
DESCRIPTION:
The IDT72V3612 is a pin and functionally compatible version of the
IDT723612, designed to run off a 3.3V supply for exceptionally low-power
consumption. This device is a monolithic high-speed, low-power CMOS bi-
directional clocked FIFO memory. It supports clock frequencies up to 83 MHz
FUNCTIONAL BLOCK DIAGRAM
CLKA
CSA
W/RA
ENA
MBA
Port-A
Control
Logic
Mail 1
Register
Parity
Gen/Check
MBF1
PEFB
PGB
RST
ODD/
EVEN
Device
Control
FFA
AFA
36
FS0
FS1
A0 - A35
EFA
AEA
RAM
ARRAY
64 x 36
Write Read
Pointer Pointer
FIFO1
Status Flag
Logic
FIFO2
Programmable Flag
Offset Register
Status Flag
Logic
Read Write
Pointer Pointer
36
EFB
AEB
B0 - B36
FFB
AFB
36
RAM
ARRAY
64 x 36
PGA
PEFA
MBF2
Parity
Gen/Check
Mail 2
Register
Port-B
Control
Logic
IDT and the IDT logo are registered trademarks of Integrated Device Technology, Inc. SyncBiFIFO is a trademark of Integrated Device Technology, Inc.
COMMERCIAL TEMPERATURE RANGE
1
2003 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice.
CLKB
CSB
W/RB
ENB
MBB
4659 drw 01
MAY 2003
DSC-4659/1