©2014 Integrated Device Technology, Inc.
MARCH 2014
DSC-4856/8
1
Functional Block Diagram
Features:
◆
True Dual-Ported memory cells which allow simultaneous
access of the same memory location
◆
High-speed clock to data access
– Commercial: 7.5/9/12ns (max.)
– Industrial: 9ns (max.)
◆
Low-power operation
– IDT70V9389/289L
Active: 500mW (typ.)
Standby: 1.5mW (typ.)
◆
Flow-Through or Pipelined output mode on either port via
the FT/PIPE pins
◆
Counter enable and reset features
◆
Dual chip enables allow for depth expansion without
additional logic
◆
LVTTL- compatible, single 3.3V (±0.3V) power supply
◆
Full synchronous operation on both ports
– 4ns setup to clock and 0ns hold on all control, data, and
address inputs
– Data input, address, and control registers
– Fast 7.5ns clock to data out in the Pipelined output mode
– Self-timed write allows fast cycle time
– 12ns cycle time, 83MHz operation in Pipelined output
mode
◆
Separate upper-byte and lower-byte controls for
multiplexed bus and bus matching compatibility
◆
Industrial temperature range (–40°C to +85°C) is
available for selected speeds
◆
Available in a 128-pin Thin Quad Flatpack (TQFP) and
100-pin Thin Quad Flatpack (TQFP)
◆
Green parts available, see ordering information
IDT70V9389/289L
0a 1a
0b 1b
0/1
ab
I/O
Control
1
0/1
0
FT
/PIPE
R
R/
W
R
UB
R
LB
R
CE
0R
OE
R
CE
1R
MEMORY
ARRAY
Counter/
Address
Reg.
4856 drw 01
A
15R
A
0R
CLK
R
ADS
R
CNTEN
R
CNTRST
R
I/O
9L
-I/O
17L
(2)
I/O
0L
-I/O
8L
(1)
I/O
9R
-I/O
17R
(1)
I/O
0R
-I/O
8R
(1)
A
15L
Counter/
Address
Reg.
R/
W
L
UB
L
LB
L
CE
0L
OE
L
CE
1L
1
0/1
0
1b 0b
1a 0a
0/1
ba
I/O
Control
FT
/PIPE
L
A
0L
CLK
L
ADS
L
CNTEN
L
CNTRST
L
HIGH-SPEED 3.3V
64K x18/x16
SYNCHRONOUS PIPELINED
DUAL-PORT STATIC RAM
NOTES:
1. I/O
0X - I/O7X for IDT70V9289.
2. I/O
8X - I/O15X for IDT70V9289.