HIGH-SPEED
4K x 8 FourPort
TM
STATIC RAM
.eatures
High-speed access
鈥?Commercial: 20/25/35ns (max.)
鈥?Industrial: 25ns (max.)
鈥?Military: 25/35ns (max.)
Low-power operation
鈥?IDT7054S
Active: 750mW (typ.)
Standby: 7.5mW (typ.)
鈥?IDT7054L
Active: 750mW (typ.)
Standby: 1.5mW (typ.)
True FourPort memory cells which allow simultaneous
access of the same memory locations
Fully asynchronous operation from each of the four ports:
P1, P2, P3, and P4
x
x
IDT7054S/L
x
x
TTL-compatible; single 5V (鹵10%) power supply
Available in 128 pin Thin Quad Flatpack and 108 pin PGA
packages
Industrial temperature range (鈥?0擄C to +85擄C) is available
for selected speeds
x
Description
The IDT7054 is a high-speed 4K x 8 FourPort鈩?Static RAM designed
to be used in systems where multiple access into a common RAM is
required. This FourPort Static RAM offers increased system performance
in multiprocessor systems that have a need to communicate in real time and
also offers added benefit for high-speed systems in which multiple access
is required in the same cycle.
The IDT7054 is also designed to be used in systems where on-chip
hardware port arbitration is not needed. This part lends itself to those
systems which cannot tolerate wait states or are designed to be able to
x
x
.unctional Block Diagram
R/
W
P1
CE
P1
OE
P1
CE
P4
R/
W
P4
OE
P4
I/O
0P1
-I/O
7P1
COLUMN
I/O
COLUMN
I/O
I/O
0P4
-I/O
7P4
A
0P1
- A
11P1
PORT 1
ADDRESS
DECODE
LOGIC
PORT 2
ADDRESS
DECODE
LOGIC
MEMORY
ARRAY
PORT 4
ADDRESS
DECODE
LOGIC
PORT 3
ADDRESS
DECODE
LOGIC
A
0P4
- A
11P4
A
0P2
- A
11P2
A
0P3
- A
11P3
I/O
0P2
-I/O
7P2
OE
P2
CE
P2
R/
W
P2
COLUMN
I/O
COLUMN
I/O
I/O
0P3
-I/O
7P3
OE
P3
CE
P3
R/
W
P3
3241 drw 01
NOVEMBER 2001
1
漏2001 Integrated Device Technology, Inc.
DSC 3241/11