Cypress CY27H010-45PC, 1Mbit (128K x 8) Parallel EPROM, 45 ns access time, 4.5 V supply, 0°C to 70°C, 32-pin DIP, Through Hole, Bulk.
| Parameter | Value |
|---|---|
| Interface | Parallel |
| Mounting | Through Hole |
| Operating temperature high | 0°C to 70°C (TA) |
| Frame_size | 1Mbit |
| Access time | 45 ns |
| Memory type | Non-Volatile |
| Package_type | Bulk |
| Memory format | EPROM |
| Status | Active |
| Supply voltage | 4.5 |
| Memory organization | 128K x 8 |
This rating drives the timing closure decision in the address-decoder and read-strobe logic. The parallel interface is straightforward — no burst modes or page modes — so every read cycle pays the full 45 ns access penalty.
The 32-pin DIP (dual in-line package) with through-hole mounting is the standard footprint for socketed or soldered EPROMs on legacy PCBs. The Bulk package option means it ships in tubes or trays, not tape-and-reel.
The access time is 45 ns. This is the time from address valid to data valid on the output pins, rated for the full operating voltage and temperature range.