鈼?/div>
Fully asynchronous operation from either port
Full on-chip hardware support of semaphore signalling be-
tween ports
Battery backup operation鈥?V data retention (LA only)
TTL-compatible; single 5V (鹵10%) power supply
Available in plastic packages
Industrial temperature range (鈥?0擄C to +85擄C) is available
for selected speeds
Functional Block Diagram
R/W
L
CE
L
R/W
R
CE
R
OE
L
I/O
CONTROL
I/O
CONTROL
OE
R
I/O
0L
- I/O
7L
I/O
0R
- I/O
7R
MEMORY
ARRAY
SEMAPHORE
LOGIC
SEM
L
ADDRESS
DECODER
ADDRESS
DECODER
SEM
R
A
0L
- A
11L
A
0R
- A
11R
2721 drw 01
JANUARY 2001
1
漏2000 Integrated Device Technology, Inc.
DSC 2621/12