The HM514400BLTT7 is a DRAM (Dynamic Random Access Memory) chip manufactured by Hitachi. This specific memory chip is a 4Mbit DRAM organized as 4,194,304 words x 1 bit. It is designed for use in a variety of applications requiring high-density memory, particularly in older computer systems and graphics cards.

Applications

• Main memory in older personal computers.
• Graphics memory in graphics cards.
• Memory modules for embedded systems.
• Industrial control equipment requiring DRAM.

Features

• Capacity: 4 Mbit (4M x 1 bit)
• Organization: 4,194,304 words x 1 bit
• Access Time: Typically around 70-80 ns (though specific speed grade is indicated by the part number suffix).
• Package: TSOP (Thin Small Outline Package)
• Refresh: Requires periodic refresh cycles to maintain data.
• Power Supply: 5V

Benefits

• High Density: Offers a relatively high memory density for its time, allowing for more data storage in a smaller space.
• Cost-Effective: Provided a cost-effective solution for memory requirements in older systems.
• Standard Interface: Uses a standard DRAM interface, making it compatible with a wide range of systems.

Additional Details

The HM514400BLTT7 is a dynamic RAM, which means it requires periodic refresh cycles to maintain the stored data. This is in contrast to static RAM (SRAM), which retains data as long as power is supplied. DRAM offers higher density at a lower cost compared to SRAM, but it is slower and requires more complex control circuitry. The TSOP package allows for surface mounting on PCBs, enabling compact designs. This particular chip would have been a common component in computer systems and graphics cards during the late 1990s and early 2000s.