GR3281 is a 32768 word by 8 bits (32K x 8) non-volatile CMOS Static Ram, fabricated from advanced silicon gate CMOS technology and a high reliability lithium power cell.
The GR3281 is a 32 K × 8 non‑volatile CMOS static RAM with an internal lithium cell that retains data for up to ten years without power. It conforms to JEDEC pin‑out standards and includes automatic power‑down and write‑protect features.
The document provides absolute maximum ratings, operating conditions, pin connections, timing diagrams, dimensions and disposal instructions, making it a complete reference for designers and system integrators.
| Absolute maximum Vdd | -0.3 V to 7.0 V |
|---|---|
| Operating supply voltage (Vdd) typical | 5.0 V |
| Operating temperature range | -20 °C to +70 °C |
| Power‑down time | Maximum 15 µs |
| Data retention time | 10 years (typical) |
| Read cycle time | 100 ns |
| Write cycle time | 100 ns |
Power‑down takes a maximum of 15 µs to go from 5 V to 0 V.
Vdd may be as low as –0.3 V and as high as 7.0 V.
Typical Vdd is 5.0 V, with a range from 4.75 V to 5.5 V.