This document describes the features and characteristics of Alliance Semiconductor's AS7C4098 and AS7C34098 5V/3.3V 256K × 16 CMOS SRAM products, including temperature range, organization, power consumption, data retention, memory expansion, and interface compatibility.
The AS7C4098 (5 V) and AS7C34098 (3.3 V) are 4‑Mbit static RAMs organized as 262,144 words × 16 bits. They offer low standby power, fast address and output enable times, and are available in 44‑pin SOJ and TSOP II packages.
Key features include individual byte enable controls, multiple power/ground pins, and TTL‑compatible three‑state I/O. Detailed electrical characteristics, timing diagrams, and package dimensions are provided for both commercial and industrial temperature ranges.
| Memory organization | 262,144 words × 16 bits |
|---|---|
| Standby power consumption | 110 mW (AS7C4098) / 72 mW (AS7C34098) |
| Data retention voltage | 2.0 V |
The AS7C4098 consumes 110 mW in CMOS standby mode.
The TSOP II package has a length of 12.0 mm and a width of 8.0 mm (typical).