參數資料
型號: IDT70V9179L6PFI
廠商: Integrated Device Technology, Inc.
英文描述: HIGH-SPEED 3.3V 64/32K x 9 SYNCHRONOUS PIPELINED DUAL-PORT STATIC RAM
中文描述: 高速3.3 64/32K × 9同步流水線雙端口靜態(tài)RAM
文件頁數: 15/17頁
文件大?。?/td> 305K
代理商: IDT70V9179L6PFI
6.42
IDT70V9189/79L
High-Speed 64/32K x 9 Dual-Port Synchronous Pipelined Static RAM Industrial and Commercial Temperature Ranges
Functional Description
The IDT70V9189/79 provides a true synchronous Dual-Port Static
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 s ndependent of the LOW to HIGH transition of the clock
signal.
An asynchronous output enable is provided to ease asynchronous
bus interfacing. Counter enable inputs are also provided to staff the
operation of the address counters for fast nterleaved memory applications.
CE
0
= V
IH
or CE
1
= V
IL
for one clock cycle will power down the internal
circuitry to reduce static power consumption. Multiple chip enables allow
easier banking of multiple IDT70V9189/79's for depth expansion configu-
rations. When the Pipelined output mode is enabled, two cycles are
required with
CE
0
= V
IL
and CE
1
= V
IH
to re-activate the outputs.
15
Depth and Width Expansion
The IDT70V9189/79 features dual chip enables (refer to Truth Table
I) in order to facilitate rapid and simple depth expansion with no require-
ments for external ogic. Figure 4 llustrates how to control the varioius chip
enables in order to expand two devices in depth.
The IDT70V9189/79 can also be used in applications requiring
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 18-bit or
wider applications.
4860 drw 18
IDT70V9189/79
CE
0
CE
1
V
DD
Control Inputs
CE
1
CE
0
IDT70V9189/79
Control Inputs
CE
0
CE
1
A
16
/A
15(1)
CE
1
CE
0
IDT70V9189/79
Control Inputs
IDT70V9189/79
Control Inputs
CNTRST
CLK
ADS
CNTEN
R/
W
OE
V
DD
Figure 4. Depth and Width Expansion with IDT70V9189/79
NOTE:
1. A
16
is for IDT70V9189. A
15
is for IDT70V9179.
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