The Am27S23/Am27S23A is a 256‑word by 8‑bit bipolar PROM with three‑state outputs, designed for high‑speed, reliable programmable logic applications. This handbook details its distinctive characteristics, functional block diagram, and logic symbol.
Key sections include ordering information for various package types, pin descriptions, absolute maximum ratings, operating temperature ranges, DC and switching characteristics, and test circuit diagrams, giving designers the data needed for integration and testing.
| Memory size | 256 words × 8 bits |
|---|---|
| Access time (Version A) | 30 ns |
| Supply voltage (commercial) | +4.75 V to +5.25 V |
| Storage temperature range | -65 °C to +150 °C |
| Output current during programming | 250 mA (max, 1 s) |
The access time is 30 ns for version A, 40 ns for version B, 45 ns for version C, and 50 ns for version D.
The specified supply voltage (Vcc) range is +4.75 V to +5.25 V for commercial devices.