The TC55257BPL-85L is a low-power 262,144-bit static RAM (SRAM) manufactured by Toshiba Semiconductor and Storage. It's organized as 32,768 words by 8 bits. The "L" indicates a low-power version, "85" suggests an access time of 85ns, and "P" likely signifies a specific package type (e.g., PLCC - Plastic Leaded Chip Carrier). This SRAM is ideal for applications where minimal power consumption is paramount, even if it means accepting a slower access time. These applications include memory backup, low-power embedded systems, and portable devices with extended battery life requirements.

Applications:

• CMOS RAM backup
• Low-power embedded systems
• Portable devices
• Data loggers
• Industrial control systems with power constraints

Features:

• Access Time: 85 ns
• Low Power Consumption: Optimized for battery-powered operation.
• Organization: 32,768 words x 8 bits
• Single 5V power supply
• TTL Compatible inputs and outputs
• Three-state outputs
• Package: Likely a PLCC (Plastic Leaded Chip Carrier) package for surface mounting.

Benefits:

• Extended Battery Life: Extremely low power consumption greatly increases the operating time in battery-powered applications.
• Data Retention: Suitable for applications needing to retain data during power loss.
• Reduced Heat Dissipation: Low power operation translates to less heat generated, allowing for higher density designs.
• Easy Integration: TTL compatible inputs and outputs, along with three-state outputs, simplify interfacing with other digital components.
• Reliable Performance: Toshiba is a reputable semiconductor manufacturer.

Additional Details:

The TC55257BPL-85L operates from a single 5V power supply. Its TTL-compatible inputs and outputs facilitate easy interfacing with standard logic circuits. The three-state outputs allow for convenient memory expansion and bus sharing. The PLCC package is a common surface-mount option offering good mechanical stability. For accurate specifications, including standby and operating current, refer to the official Toshiba datasheet for this part number.

The primary advantage of this particular SRAM is its exceptionally low power consumption. This makes it perfect for applications where long-term data retention on battery power is essential.