参数资料
型号: LM12L458CIVX
厂商: NATIONAL SEMICONDUCTOR CORP
元件分类: 模拟信号调理
英文描述: SPECIALTY ANALOG CIRCUIT, PQCC44
封装: PLASTIC, LCC-44
文件页数: 7/29页
文件大小: 891K
代理商: LM12L458CIVX
Timing Diagrams V
A+=VD+ = +3.3V, tR =tF
= 3 ns, C
L = 100 pF for the INT, DMARQ, D0–D15
outputs.
1, 3: CS or Address valid to ALE low set-up time.
11: WR pulse width
2, 4: CS or Address valid to ALE low hold time.
12: WR high to next ALE high
5: ALE pulse width
13: WR high to next WR or RD low
6: RD high to next ALE high
14: Data valid to WR high set-up time
7: ALE low to RD low
15: Data valid to WR high hold time
8: RD pulse width
16: RD low to data bus out of TRI-STATE
9: RD high to next RD or WR low
17: RD high to TRI-STATE
10: ALE low to WR low
18: RD low to data valid (access time)
01171119
FIGURE 10. Multiplexed Data Bus
LM12L458
www.national.com
15
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