参数资料
型号: IDT709289L9PF8
厂商: IDT, Integrated Device Technology Inc
文件页数: 14/15页
文件大小: 0K
描述: IC SRAM 1MBIT 9NS 100TQFP
标准包装: 750
格式 - 存储器: RAM
存储器类型: SRAM - 双端口,同步
存储容量: 1M (64K x 16)
速度: 9ns
接口: 并联
电源电压: 4.5 V ~ 5.5 V
工作温度: 0°C ~ 70°C
封装/外壳: 100-LQFP
供应商设备封装: 100-TQFP(14x14)
包装: 带卷 (TR)
其它名称: 709289L9PF8
IDT709289L
High-Speed 64K x 16 Synchronous Pipelined Dual-Port Static RAM
Industrial and Commercial Temperature Ranges
A Functional Description
The IDT709289 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 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.
A 16
Depth and Width Expansion
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.
IDT709289
CE 0
IDT709289
CE 0
Control Inputs
CE 1
V CC
Control Inputs
CE 1
V CC
IDT709289
Control Inputs
CE 1
CE 0
IDT709289
Control Inputs
CE 1
CE 0
CNTRST
CLK
ADS
CNTEN
Figure 4. Depth and Width Expansion with IDT709289
14
6.42
4842 drw 19
R/ W
UB , LB
OE
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