msm518221 Oki Semiconductor, msm518221 Datasheet - Page 10

• Manufacturer Part Number: msm518221
• Description: 262,214-word ? 8-bit Field Memory
• Manufacturer: Oki Semiconductor

¡ Semiconductor
Notes: 1. Input signal reference levels for the parameter measurement are V
2. AC measurements assume t
3. Read address must have more than a 600 address delay than write address in every
4. Read must have more than a 600 address delay than write in order to read the data
5. When the read address delay is between more than 71 and less than 599, read data
6. Outputs are measured with a load equivalent to 1 TTL load and 30 pF.
= 0 V. The transition time t
between V
cycle when asynchronous read/write is performed.
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 70 address delay than write, the read data are the data
written in a previous series of write cycles which had been written before the last
write reset cycle: this is called "old data read".
will be undetermined. However, normal write is achieved in this address condition.
Output reference levels are V
IH
= 3.0 V and V
IL
T
T
is defined to be a transition time that signal transfers
= 0 V.
OH
= 3 ns.
= 2.4 V and V
OL
= 0.8 V.
IH
= 3.0 V and V
MSM518221
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IL