Key facts
- Brand
- GREENWICH
- Model
- GR3281
- Category
- Other Electronics
- Industry
- Electronics
- Documents
- 2
- Languages
- EN
- Last added
- 2012-05-11
Start here
Greenwich Instruments GR3281H Non-Volatile RAM Datasheet
The GR3281H is an industrial‑temperature‑range, 32768‑word by 8‑bit (32K × 8) non‑volatile CMOS static RAM fabricated with advanced silicon‑gate technology and a high‑reliability lithium power cell. It conforms to JEDEC pin‑out standards and offers fast read/write cycles (70 ns) with low power consumption.
The device is suited for data‑loggers, process‑control, automation, robotics and user‑definable lookup tables. It retains data for up to ten years without external power, and the power‑down circuit shuts off in a maximum of 15 µs. Disposal must follow the provided instructions, returning the device to Greenwich Instruments for safe handling.
GREENWICH GR3281 specifications
| Memory organization | 32768 word by 8 bits (32K × 8) |
|---|---|
| Read cycle time | 70 ns |
| Write cycle time | 70 ns |
| Dimensions (mm) | 37 mm |
| Supply voltage (Vdd) typical | 4.75 V – 5.5 V |
| Supply voltage (Vdd) absolute max | -0.3 V to 7.0 V |
| Operating temperature range | -40 °C to +85 °C |
| Active supply current | 30 mA |
| Deselected supply current | 1.0 mA |
| Data retention time | 10 years |
| Power‑down time | max 15 µs |
Source: Greenwich Instruments GR3281H Non-Volatile RAM Datasheet
All GREENWICH GR3281 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the operating temperature range of the GR3281H?
The GR3281H operates from –40 °C to +85 °C.
From: Greenwich Instruments GR3281H Non-Volatile RAM Datasheet
How long can the GR3281H retain data without power?
It can retain data for up to ten years, limited by the lithium cell life.
From: Greenwich Instruments GR3281H Non-Volatile RAM Datasheet
What is the maximum power‑down time of the GR3281?
Power‑down takes a maximum of 15 µs to go from 5 V to 0 V.
From: Greenwich Instruments GR3281 Non-Volatile RAM Handbook
What are the absolute maximum ratings for Vdd?
Vdd may be as low as –0.3 V and as high as 7.0 V.
From: Greenwich Instruments GR3281 Non-Volatile RAM Handbook