The LC33832 series is composed of pseudo static RAM that operates on a single 5 V power supply and is organized as 32768 words × 8 bits. By using memory cells each composed of a single transistor and capacitor, together with peripheral CMOS circuitry, this series achieves ease of use with high density, high speed, and low power dissipation. The LC33832 series can easily accomplish auto-refresh and self-refresh by means of OE/RFSH input. As with asynchronous static RAM, WE input uses a system for incorporating input data at the WE rise, thereby facilitating interfacing with a microcomputer. The LC33832 series features pin compatibility with 256 K static RAM (the LC36256A series), and available packages are the standard 28-pin DIP with widths of 600 mil or 300 mil, and the SOP with a width of 450 mil. CE-only refresh can be accomplished by selecting address 256 (A0 to A7) within 4 ms. Features: 32768 words × 8 bits configuration, Single 5 V ±10% power supply, All input and output (I/O) TTL compatible, Fast access times and low power dissipation, 4 ms refresh using 256 refresh cycle, CE-only refresh, auto-refresh, and self-refresh, Low-power version: 100 µA self-refresh current, Package DIP28-pin (600 mil) plastic package: LC33832P, PL DIP28-pin (300 mil) plastic package: LC33832S, SL SOP28-pin (450 mil) plastic package: LC33832M, ML
The LC33832 series is a pseudo‑static RAM organized as 32768 words × 8 bits and powered from a single 5 V supply. It provides auto‑refresh, self‑refresh and CE‑only refresh functions, making it easy to interface with micro‑computers.
Key features include TTL‑compatible I/O, low‑power operation (100 pA self‑refresh current), fast access times (70 ns to 100 ns) and three package options (DIP‑28 and SOP‑28). Detailed electrical specifications, timing diagrams and pin assignments are provided for design integration.
| Memory size | 256 K (32768 words × 8 bits) |
|---|---|
| Supply voltage (typical) | 5 V (4.5 V min, 5.5 V max) |
| Access time (CE) | 70 ns – 100 ns |
| Refresh cycle time | 4 ms (CE‑only refresh) |
| Power dissipation (max) | 600 mW |
| Package options | DIP‑28 (600 mil, 300 mil) and SOP‑28 (450 mil) |
It is offered in DIP‑28 packages (600 mil and 300 mil widths) and an SOP‑28 package (450 mil width).
The CE‑only refresh cycle is 4 ms using a 256‑address refresh.
The low‑power version draws only 100 pA of self‑refresh current in standby.