参数资料
型号: IDT7024S17J8
厂商: IDT, Integrated Device Technology Inc
文件页数: 11/22页
文件大小: 0K
描述: IC SRAM 64KBIT 17NS 84PLCC
标准包装: 200
格式 - 存储器: RAM
存储器类型: SRAM - 双端口,异步
存储容量: 64K(4K x 16)
速度: 17ns
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: 84-LCC(J 形引线)
供应商设备封装: 84-PLCC(29.21x29.21)
包装: 带卷 (TR)
其它名称: 7024S17J8
IDT7024S/L
High-Speed 4K x 16 Dual-Port Static RAM
Military, Industrial and Commercial Temperature Ranges
Timing Waveform of Write Cycle No. 1, R/ W Controlled Timing (1,5,8)
t WC
ADDRESS
t HZ (7)
OE
t AW
CE or SEM
UB or LB
(9)
(9)
t AS (6)
t WP (2)
t WR
(3)
R/ W
t WZ
(7)
t OW
DATA OUT
(4)
t DW
t DH
(4)
CE or SEM
DATA IN
2740 drw 09
Timing Waveform of Write Cycle No. 2, CE , UB , LB Controlled Timing (1,5)
t WC
ADDRESS
t AW
(9)
UB or LB
(9)
R/ W
t AS (6)
t EW (2)
t DW
t WR (3)
t DH
DATA IN
2740 drw 10
NOTES:
1. R/ W or CE or UB & LB = V IH during all address transitions.
2. A write occurs during the overlap (t EW or t WP ) of a UB or LB = V IL and a CE = V IL and a R/ W = V IL for memory array writing cycle.
3. t WR is measured from the earlier of CE or R/ W (or SEM or R/ W ) going HIGH = V IL to the end-of-write cycle.
4. During this period, the I/O pins are in the output state and input signals must not be applied.
5. If the CE or SEM LOW = V IL transition occurs simultaneously with or after the R/ W = V IL transition, the outputs remain in the High-impedance state.
6. Timing depends on which enable signal is asserted last, CE , R/ W , UB , or LB .
7. This parameter is guaranted by device characterization, but is not production tested. Transition is measured 0mV steady state with the Output Test Load
(Figure 2).
8. If OE = V IL during R/ W controlled write cycle, the write pulse width must be the larger of t WP for (t WZ + t DW ) to allow the I/O drivers to turn off and data to be
placed on the bus for the required t DW . If OE = V IH 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 .
9. To access RAM, CE = V IL , UB or LB = V IL , and SEM = V IH . To access Semaphore, CE = V IH or UB & LB = V IH , and SEM = V IL . t EW must be
met for either condition.
11
6.42
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