The AS4C4256 883C is a randomly accessed solid‑state memory containing 1,048,576 bits organized in a 262,144 × 4 configuration. It uses a 20‑pin DIP/LCC package, supports fast page mode for quicker read/write cycles, and features industry‑standard pinout and timing with full TTL compatibility.
The device is qualified for military temperature ranges (‑55 °C to +125 °C) and meets MIL‑STD‑883. Electrical specifications include a 4.5‑5.5 V supply, low standby current, and defined timing parameters such as access times and refresh cycles. Detailed test requirements are listed per MIL‑STD‑883 methods.
| Supply Voltage (VCC) | 4.5 V – 5.5 V |
|---|---|
| Input High Voltage (VIH) | 2.4 V |
| Operating Current (Fast Page Mode) | 70 mA – 50 mA |
| Refresh Period | 8 ms (512 cycles) |
| Fast Page Mode Read/Write Cycle Time | 45 ns – 65 ns |
The device operates with a supply voltage between 4.5 V and 5.5 V.
The refresh period is 8 ms, covering 512 refresh cycles.
Fast page mode read or write cycles are 45 ns to 65 ns.