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The MS401 is a memory component manufactured by MOSEL. Below are the factual specifications, descriptions, and features:

Specifications:

• Manufacturer: MOSEL
• Type: SRAM (Static Random-Access Memory)
• Density: 4 Mbit (512K x 8)
• Operating Voltage: 3.3V
• Access Time: 10 ns, 12 ns, 15 ns (varies by model)
• Package: 32-pin SOP (Small Outline Package)
• Operating Temperature Range: Commercial (0°C to +70°C) / Industrial (-40°C to +85°C)

Descriptions:

• The MS401 is a high-speed CMOS SRAM designed for low-power and high-performance applications.
• It features a fully static operation, meaning no refresh cycles are required.
• The device is compatible with industrial and commercial temperature ranges.

Features:

• Low Power Consumption: Operates at 3.3V with standby current as low as 1 µA (typical).
• High-Speed Access: Fast access times (10 ns, 12 ns, or 15 ns).
• Wide Operating Voltage Range: Supports 3.3V ±10%.
• TTL-Compatible Inputs/Outputs: Ensures compatibility with standard logic levels.
• Battery Backup Capability: Suitable for battery-operated systems.
• Industrial-Grade Reliability: Available in extended temperature ranges for harsh environments.

This information is based on available datasheets and technical documentation from MOSEL. For exact part variants, refer to the manufacturer's official specifications.