參數(shù)資料
型號: IDT709289L9PFI
廠商: INTEGRATED DEVICE TECHNOLOGY INC
元件分類: DRAM
英文描述: HIGH-SPEED 64K x 16 SYNCHRONOUS PIPELINED DUAL-PORT STATIC RAM
中文描述: 64K X 16 DUAL-PORT SRAM, 20 ns, PQFP100
封裝: 14 X 14 MM, 1.40 MM HEIGHT, TQFP-100
文件頁數(shù): 14/15頁
文件大?。?/td> 190K
代理商: IDT709289L9PFI
6.42
IDT709289L
High-Speed 64K x 16 Synchronous Pipelined Dual-Port Static RAM Industrial and Commercial Temperature Ranges
14
4842 drw 19
IDT709289
CE
0
CE
1
CE
1
CE
0
CE
0
CE
1
A
16
CE
1
CE
0
V
CC
V
CC
IDT709289
IDT709289
IDT709289
Control Inputs
Control Inputs
Control Inputs
Control Inputs
CNTRST
CLK
ADS
CNTEN
R/
W
UB
,
LB
OE
#
The IDT709289 provides a true synchronous Dual-Port Static
RAMinterface. Registered inputs provide mnimal 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.
An asynchronous output enable is provided to ease asynchronous
bus interfacing. Counter enable inputs are also provided to stall the
operation of the address counters for fast interleaved memory appli-
cations.
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 IDT709289's for depth
expansion configurations. When the Pipelined output mode is en-
abled, two cycles are required with
CE
0
= V
IL
and CE
1
= V
IH
to re-
activate the outputs.
#%)+)%,2#
The IDT709289 features dual chip enables (refer to Truth Table I)
in order to facilitate rapid and simple depth expansion with no
requirements for external logic. Figure 4 illustrates how to control the
various chip enables in order to expand two devices in depth.
The 709289 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 32-bit
or wider applications.
Figure 4. Depth and Width Expansion with IDT709289
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