IDT70V9289L12PF IDT [Integrated Device Technology], IDT70V9289L12PF Datasheet - Page 17

• Manufacturer Part Number: IDT70V9289L12PF
• Description: HIGH-SPEED 3.3V 64K x18/x16 SYNCHRONOUS PIPELINED DUAL-PORT STATIC RAM
• Manufacturer: IDT [Integrated Device Technology]

Functional Description
RAM interface. Registered inputs provide minimal set-up and hold times
on address, data, and all critical control inputs. All internal registers are
clocked on the rising edge of the clock signal, however, the self-timed
internal write pulse is independent of the LOW to HIGH transition of the clock
signal.
bus interfacing. Counter enable inputs are also provided to staff the
operation of the address counters for fast interleaved memory applications.
circuitry to reduce static power consumption. Multiple chip enables allow
easier banking of multiple IDT70V9389/289's for depth expansion con-
figurations. When the Pipelined output mode is enabled, two cycles are
required with CE
IDT70V9389/289L
High-Speed 3.3V 64K x18/x16 Dual-Port Synchronous Pipelined Static RAM
The IDT70V9389/289 provides a true synchronous Dual-Port Static
An asynchronous output enable is provided to ease asynchronous
CE
0
= V
IH
or CE
0
A
= V
1
= V
16
IL
IL
and CE
for one clock cycle will power down the internal
1
= V
IH
Control Inputs
to re-activate the outputs.
IDT70V9389/289
Control Inputs
IDT70V9389/289
Figure 4. Depth and Width Expansion with IDT70V9389/289
CE
CE
CE
CE
0
1
1
0
V
6.42
DD
17
Depth and Width Expansion
I) in order to facilitate rapid and simple depth expansion with no require-
ments for external logic. Figure 4 illustrates how to control the varioius chip
enables in order to expand two devices in depth.
expanded width, as indicated in Figure 4. Since the banks are allocated
at the discretion of the user, the external controller can be set up to drive
the input signals for the various devices as required to allow for 36/32-bit
or wider applications.
The IDT70V9389/289 features dual chip enables (refer to Truth Table
The IDT70V9389/289 can also be used in applications requiring
Control Inputs
Control Inputs
IDT70V9389/289
IDT70V9389/289
Industrial & Commercial Temperature Ranges
CE
CE
CE
CE
4856 drw 18
0
1
1
0
V
DD
CNTRST
CLK
ADS
CNTEN
R/W
LB, UB
OE