The TC55257DFTL-85L is a high-speed, low-power 262,144-bit static RAM (SRAM) manufactured by Toshiba Semiconductor and Storage. It's organized as 32,768 words by 8 bits and is designed for memory applications requiring fast access times and minimal power consumption. The 85L designation indicates an access time of 85 nanoseconds.

Applications:

• Cache memory in microprocessors
• Buffer memory in data acquisition systems
• Program storage in embedded systems
• Working memory in industrial control equipment
• Memory for communication devices

Features:

• High-speed access time (85 ns)
• Low power consumption
• Fully static operation (no clock required)
• Single 5V power supply
• TTL compatible inputs and outputs
• Three-state outputs
• Available in a small outline package (SOP) or other surface mount packages

Benefits:

• Fast data retrieval due to the short access time, improving overall system performance.
• Reduced power consumption extends battery life in portable devices and lowers overall system power requirements.
• Simplified system design due to the fully static operation, which eliminates the need for complex timing circuits.
• Easy integration with standard logic circuits due to TTL compatibility.
• Flexible memory configurations are possible due to the three-state outputs, enabling memory expansion and sharing.

Additional Details:

The TC55257DFTL-85L operates from a single 5V power supply and typically consumes around 50 mA of current during operation. The standby current is significantly lower, usually in the microampere range, further reducing power consumption when the device is not actively being accessed. The device features a chip enable (CE) input, which allows for easy memory selection and control. Its operating temperature range typically spans from 0°C to 70°C. The package is a 28-pin TSOP or SOP, designed for surface mount assembly.