HIGH-SPEED
IDT7025S/L
8K x 16 DUAL-PORT
STATIC RAM
◆
IDT7025 easily expands data bus width to 32 bits or more
using the Master/Slave select when cascading more than
one device
M/S = H for BUSY output flag on Master
M/S = L 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
Battery backup operation—2V data retention
TTL-compatible, single 5V (±10%) power supply
Available in 84-pin PGA, Flatpack, PLCC, and 100-pin Thin
Quad Flatpack
Industrial temperature range (–40°C to +85°C) is available
for selected speeds
Green parts available, see ordering information
Features
◆
True Dual-Ported memory cells which allow simultaneous
reads of the same memory location
High-speed access
◆
◆
– Military:20/25/35/55/70ns(max.)
– Industrial: 55ns (max.)
◆
◆
◆
– Commercial:15/17/20/25/35/55ns(max.)
Low-power operation
◆
– IDT7025S
◆
◆
◆
◆
Active:750mW(typ.)
Standby: 5mW (typ.)
– IDT7025L
Active:750mW(typ.)
Standby: 1mW (typ.)
Separate upper-byte and lower-byte control for multiplexed
◆
◆
◆
bus compatibility
FunctionalBlockDiagram
R/W
R
R
R/W
L
L
UB
UB
LB
CE
OE
L
L
L
LBR
CER
OER
I/O8L-I/O15L
I/O0L-I/O7L
I/O8R-I/O15R
I/O
Control
I/O
Control
I/O0R-I/O7R
(1,2)
(1,2)
R
BUSY
BUSY
L
A
12R
0R
A
12L
Address
Decoder
MEMORY
ARRAY
Address
Decoder
A
0L
A
13
13
ARBITRATION
INTERRUPT
SEMAPHORE
LOGIC
CE
OE
R/W
L
CE
OE
R/W
R
L
R
L
R
SEM
L
SEM
R
(2)
(2)
INT
R
M/S
INT
L
2683 drw 01
NOTES:
1. (MASTER): BUSY is output; (SLAVE): BUSY is input.
2. BUSY outputs and INT outputs are non-tri-stated push-pull.
JULY 2012
1
DSC 2683/11
©2012IntegratedDeviceTechnology,Inc.