HIGH-SPEED
128K x 8 DUAL-PORT
STATIC RAM
Features
x
x
x
IDT7009L
x
x
x
True Dual-Ported memory cells which allow simultaneous
reads of the same memory location
High-speed access
鈥?Commercial: 15/20ns (max.)
Low-power operation
鈥?IDT7009L
Active: 1W (typ.)
Standby: 1mW (typ.)
Dual chip enables allow for depth expansion without
external logic
IDT7009 easily expands data bus width to 16 bits or
more using the Master/Slave select when cascading more
than one device
x
x
x
x
x
x
x
M/S = V
IH
for
BUSY
output flag on Master,
M/S = V
IL
for
BUSY
input on Slave
Interrupt Flag
On-chip port arbitration logic
Full on-chip hardware support of semaphore signaling
between ports
Fully asynchronous operation from either port
TTL-compatible, single 5V (鹵10%) power supply
Available in a 100-pin TQFP
Industrial temperature range (鈥?0擄C to +85擄C) is available
for selected speeds
Functional Block Diagram
R/W
L
CE
0L
CE
1L
OE
L
R/W
R
CE
0R
CE
1R
OE
R
I/O
0-7L
I/O
Control
I/O
Control
I/O
0-7R
BUSY
L
A
16L
A
0L
(1,2)
BUSY
R
128Kx8
MEMORY
ARRAY
7009
17
17
(1,2)
Address
Decoder
Address
Decoder
A
16R
A
0R
CE
0L
CE
1L
OE
L
R/W
L
SEM
L
(2)
INT
L
ARBITRATION
INTERRUPT
SEMAPHORE
LOGIC
CE
0R
CE
1R
OE
R
R/W
R
SEM
R
(2)
INT
R
4839 drw 01
M/S
(1)
NOTES:
1.
BUSY
is an input as a Slave (M/S = V
IL
) and an output when it is a Master (M/S = V
IH
).
2.
BUSY
and
INT
are non-tri-state totem-pole outputs (push-pull).
JANUARY 2001
DSC-4839/2
1
漏2000 Integrated Device Technology, Inc.