Key facts
- Brand
- GREENWICH
- Model
- GR881
- Category
- Memory
- Industry
- Electronics
- Documents
- 2
- Languages
- EN
- Last added
- 2012-05-11
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Greenwich Instruments GR881 Non‑Volatile RAM Datasheet
The GR881 is an 8192‑word by 8‑bit 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 can retain data indefinitely without external power, making it suitable for program development, data logging, and lookup tables in automation and robotics.
Key specifications include a maximum power‑down time of 15 µs, a typical operating supply voltage of 5 V, data‑retention voltage of 4.5 V, and a ten‑year data‑retention period. The device provides detailed timing parameters such as 100 ns read and write cycles, and includes absolute maximum ratings, pin‑out diagrams, and disposal instructions.
GREENWICH GR881 specifications
| Memory size | 8192 words × 8 bits (8 K×8) |
|---|---|
| Power‑down time | 15 µs (max) |
| Data retention time | 10 years (typical) |
| Operating supply voltage (Vdd) | 4.75 V – 5.5 V |
| Absolute maximum Vdd | 7.0 V |
| Access time (read cycle) | 100 ns |
| Write cycle time | 100 ns |
| Package dimensions | 37 mm × 73 mm |
Source: Greenwich Instruments GR881 Non‑Volatile RAM Datasheet
All GREENWICH GR881 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the power‑down time of the GR881?
The GR881 powers down from 5 V to 0 V in a maximum of 15 µs.
From: Greenwich Instruments GR881 Non‑Volatile RAM Datasheet
How long can the GR881 retain data without external power?
It can retain data for about ten years, limited by the shelf life of its lithium cell.
From: Greenwich Instruments GR881 Non‑Volatile RAM Datasheet
What is the operating temperature range of the GR881-H?
The GR881-H operates from –40 °C up to +85 °C.
From: Greenwich Instruments GR881-H Non-Volatile RAM Datasheet
How long can the GR881-H retain data without power?
It can retain data for up to ten years thanks to its internal lithium cell.
From: Greenwich Instruments GR881-H Non-Volatile RAM Datasheet