MSM514223B 查看數據表（PDF） - Oki Electric Industry

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MSM514223B

262,263-Word x 4-Bit Field Memory

Oki Electric Industry 

¡ Semiconductor

MSM514223B

Notes: 1. Input signal reference levels for the parameter measurement are VIH = 2.4 V and VIL

= 0.8 V. The transition time tT is defined to be a transition time that signal transfers

between VIH = 2.4 V and VIL = 0.8 V.

2. AC measurements assume tT = 3 ns.

3. Read address must have more than a 600 address delay than write address in every

cycle when asynchronous read/write is performed.

4. Read must have more than a 600 address delay than write in order to read the data

written in a current series of write cycles which has been started at last write reset

cycle: this is called "new data read".

When read has less than a 119 address delay than write, the read data are the data

written in a previous series of write cycles which had been written before at last write

reset cycle: this is called "old data read".

5. When the read address delay is between more than 120 and less than 599, read data

will be undetermined. However, normal write is achieved in this address condition.

6. Outputs are measured with a load equivalent to 2 TTL loads and 30 pF.

Output reference levels are VOH = 2.4 V and VOL = 0.8 V.

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