Specifications
Technical Spec of a Flash and RAM chips
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Supply Voltage Min | V |
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| 2.4 | 2.7 | 2.7 | 4.5 |
Supply Voltage Typ | V |
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| - | 3.0 | 3.0 | 5.0 |
Supply Voltage Max | V |
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| 5.5 | 5.5 | 5.5 | 5.5 |
Input High Voltage | V | 2.2 to VCC | 0.7 x VCC min to VCC+0.3 | 2.2 to VCC+0.3 | 2.4 to VCC+0.3 | 2.4 to VCC+0.5 | 2.2 to VCC + 0.5 V |
Input Low Voltage | V | -0.3 to 0.8 | 0.5 to 0.8 | -0.5 to 0.8 | - 0.2 to 0.6 | - 0.2 to 0.6 | –0.5 to 0.8 |
Output High Voltage | V | 2.4 min | 0.85 x VCC | 2.4 min | 2.4 min |
| 2.4 min |
Output Low Voltage | V | 0.4 max | 0.45 | 0.4 max | 0.4 max |
| 0.4 max |
Standby Power | uA |
| 1 | 3.5 to 50 | 6 to 80 | 10 to 50 | 2 to 8 |
Power Consumption | mA |
| 20 - 40 | 39 | 60 | 30 to 60 | 1.8 to 3 |
VCC for Data Retention | V |
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| 1.5 | 2.0 | 1.5 | 2.0 |
Read Timings |
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Read Cycle Time tRC | ns |
| 55 min | 55 min | 55 min | 55 min | 45 min |
Address Access Time tAA |
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| 55 min | 55 max | 55 max | 55 max | 45 max |
Chip Enable Access Time tACE |
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| 55 min | 55 max | 55 max | 55 max | 45 max |
Output Enable Access Time tOE |
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| 30 max | 25 max | 30 max | 30 max | 22 max |
Chip Enable to Output in Low-Z tCLZ |
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| 18 min | 10 min | 10 min | 10 min | 5 min |
Output Enable to Output in Low-Z tOLZ |
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| 18 min | 10 min | 5 min | 5 min | 10 min |
Chip Disable to Output in High-Z tCHZ |
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| 30 max | 20 max | 20 max | 18 max |
Output Disable to Output in High-Z tOHZ |
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| 25 max | 20 max | 20 max | 18 max |
Output Hold from Address Change tOH |
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| 0 | 10 min | 10 min | 10 min | 10 min |
Write Timings |
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Write Cycle Time tWC |
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| 55 min | 55 min | 55 min | 55 min | 45 min |
Address Valid to End of Write tAW |
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| 40 min | 40 min | 50 min | 50 min | 35 min |
Chip Enable to End of Write tCW |
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| 0 | 50 min | 50 min | 35 min |
Address Set-up Time tAS |
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| 0 | 40 min | 0 | 0 | 35 min |
Write Pulse Width tWP |
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| 20 min | 30 min | 45 min | 45 min | 35 min |
Write Recovery Time tWR |
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| 0 | 0 | 0 | 0 |
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Data to Write Time Overlap tDW |
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| 25 min | 25 min | 25 min | 25 min | 25 min |
Data Hold from End of Write Time tDH |
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| 0 | 0 | 0 | 0 | 0 |
Data Setup to Write End |
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| 25 min |
Output Active from End of Write tOW |
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| 5 min | 5 min | 5 min |
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Write to Output in High-Z tWHZ |
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| 25 max | 20 max | 20 max | 10 max |
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512K RAM
 | The memory chip described in the article below is no longer available. A suitable replacement may be ALLIANCE MEMORY - AS6C4008-55SIN - SRAM, 4MB, 2.7V-5.5V, 512KX8, SOP32 Note: This has not been tested. Rakewell will be selling their Flash/RAM PCB. This may be used instead of modifying the original 32K PCB board. This would upgrade the card to 1M. Amplia un cartucho de Z88 hasta 512Kbytes - Convert 32K RAM card to 512K RAM |
Internal RAM
| The memory chip described in the article below is no longer available. A suitable replacement may be ALLIANCE MEMORY - AS6C4008-55PCN - SRAM, 4MB, 2.7V-5.5V, 512KX8, PDIP32 This has not been tested yet |
| The memory chip described in this article below is no longer available. A suitable replacement may be ALLIANCE MEMORY - AS6C4008-55SIN - SRAM, 4MB, 2.7V-5.5V, 512KX8, SOP32 This has not been tested yet |
| The memory chip described in the article below is no longer available. A suitable replacement may be ALLIANCE MEMORY - AS6C1008-55PCN - SRAM, 1MB, 2.7V-5.5V, 128KX8, PDIP32 This has not been tested yet |
Internal ROM
| The EPROM chip described in the article below is no longer available. A suitable FLASH chip replacement is |