參數(shù)資料
型號: IDT70V25S
廠商: Integrated Device Technology, Inc.
英文描述: HIGH-SPEED 3.3V 8K x 16 DUAL-PORT STATIC RAM
中文描述: 高速3.3 8K的× 16 DUAL-PORT靜態(tài)RAM
文件頁數(shù): 1/17頁
文件大?。?/td> 276K
代理商: IDT70V25S
Integrated Device Technology, Inc.
COMMERCIAL TEMPERATURE RANGE
OCTOBER 1996
1996 Integrated Device Technology, Inc.
DSC-2944/3
1
IDT70V25S/L
HIGH-SPEED 3.3V
8K x 16 DUAL-PORT
STATIC RAM
M/
S
= H for
BUSY
output flag on Master
M/
S
= L for
BUSY
input on Slave
Busy and Interrupt Flags
Devices are capable of withstanding greater than 2001V
electrostatic charge.
On-chip port arbitration logic
Full on-chip hardware support of semaphore signaling
between ports
Fully asynchronous operation from either port
LVTTL-compatible, single 3.3V (
±
0.3V) power supply
Available in 84-pin PGA, 84-pin PLCC, and 100-pin
TQFP
DESCRIPTION:
The IDT70V25 is a high-speed 8K x 16 Dual-Port Static
RAM. The IDT70V25 is designed to be used as a stand-alone
Dual-Port RAM or as a combination MASTER/SLAVE Dual-
FUNCTIONAL BLOCK DIAGRAM
NOTES:
1. (MASTER):
BUSY
is output;
(SLAVE):
BUSY
is input.
2.
BUSY
outputs
and
INT
outputs
are non-tri-stated
push-pull.
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
FEATURES:
True Dual-Ported memory cells which allow simulta-
neous access of the same memory location
High-speed access
— Commercial: 25/35/55ns (max.)
Low-power operation
— IDT70V25S
Active: 230mW (typ.)
Standby: 3.3mW (typ.)
— IDT70V25L
Active: 230mW (typ.)
Standby: 0.66mW (typ.)
Separate upper-byte and lower-byte control for
multiplexed bus compatibility
IDT70V25 easily expands data bus width to 32 bits or
more using the Master/Slave select when cascading
more than one device
6.39
For latest information contact IDT’s web site at www.idt.com or fax-on-demand at 408-492-8391.
I/O
Control
Address
Decoder
MEMORY
ARRAY
ARBITRATION
INTERRUPT
SEMAPHORE
LOGIC
Address
Decoder
I/O
Control
R/
W
L
UB
L
BUSY
L
A
12L
A
0L
2944 drw 01
LB
L
CE
L
OE
L
I/O
8L
-I/O
15L
I/O
0L
-I/O
7L
CE
L
OE
L
R/
W
L
SEM
L
INT
L
M/
S
R/
W
R
UB
R
BUSY
R
LB
R
CE
R
OE
R
I/O
8R
-I/O
15R
I/O
0R
-I/O
7R
A
12R
A
0R
R/
W
R
SEM
R
INT
R
CE
R
OE
R
(2)
(1,2)
(1,2)
(2)
13
13
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