参数资料
型号: IDT7014S12JG
厂商: IDT, Integrated Device Technology Inc
文件页数: 8/9页
文件大小: 0K
描述: IC SRAM 36KBIT 12NS 52PLCC
标准包装: 12
格式 - 存储器: RAM
存储器类型: SRAM - 双端口,异步
存储容量: 36K(4K x 9)
速度: 12ns
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: 52-LCC(J 形引线)
供应商设备封装: 52-PLCC(19x19)
包装: 管件
其它名称: 7014S12JG
IDT7014S
High-Speed 4K x 9 Dual-Port Static RAM
Timing Waveform of Write Cycle (1,2,3,4,5)
ADDRESS
OE
t AW
Industrial and Commercial Temperature Ranges
R/ W
t AS
t WP (5)
t WR
DATA OUT
(3)
t WZ (4)
t DW
t OW
t DH
t HZ
(3)
(4)
DATA IN
NOTES:
2528 drw 10
1. R/ W must be HIGH during all address transitions.
2. t WR is measured from R/ W going HIGH to the end of write cycle.
3. During this period, the I/O pins are in the output state, and input signals must not be applied.
4. Transition is measured 0mV from the Low or High-impedance voltage with the Output Test Load (Figure 2).
5. If OE is LOW during a R/ W controlled write cycle, the write pulse width must be the larger of t WP or (t WZ + t DW ) to allow the I/O drivers to turn off data to be
placed on the bus for the required t DW . If OE is HIGH during an R/ W controlled write cycle, this requirement does not apply and the write pulse can be as short as
the specified t WP .
Functional Description
Truth Table I – Read/Write Control
The IDT7014 provides two ports with separate control, address,
and I/O pins that permit independent access for reads or writes to
any location in memory. It lacks the chip enable feature of CMOS Dual
Left or Right Port (1)
R/ W OE D 0-8
Function
Ports, thus it operates in active mode as soon as power is applied. Each
port has its own Output Enable control ( OE ). In the read mode, the port’s
OE turns on the output drivers when set LOW. The user application should
L
H
X
L
DATA IN Data written into memory
DATA OUT Data in memory output on port
avoid simultaneous write operations to the same memory location. There
X
H
Z
High-impedance outputs
is no on-chip arbitration circuitry to resolve write priority and partial data
from both ports may be written. READ/WRITE conditions are illustrated
in Table 1.
8
2528 tbl 10
NOTE:
1. A OL - A 11L is not equal to A OR - A 11R.
'H' = HIGH,'L' = LOW, 'X' = Don’t Care, and 'Z' = HIGH Impedance.
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