High Reliability 64Mbit SDRAM Equipped with Output Drivability Adjustment Function
MD56V62160M

LAPIS Semiconductor, a ROHM Group company, has announced the development of 64Mbit SDRAM equipped with an output drivability adjustment function. The optimized design is ideal for applications that demand high reliability, such as automotive and industrial systems, and contributes to improved system quality and lower costs.

As more DRAM manufacturers focus on producing high-capacity, high-speed DRAM such as DDR2 and DDR3, the supply of low to intermediate capacity DRAM (legacy DRAM) is decreasing at a significant rate, and may lead to shortages. In response to this LAPIS Semiconductor has developed the MD56V62160M to meet the continuing need for low capacity, cost-effective DRAM.

Radiant noise – typically generated during vehicle operation – often adversely affects the performance of high-frequency circuits and devices (above 800MHz), making reducing or eliminating this noise essential to improving system quality. In order to minimize the effects of radiant noise during SDRAM operation and increase the quality of Read data output waveforms based on impedance matching, a new output drivability adjustment function is integrated that can adjust the current drive capability during Read data output operation via mode set register settings (or existing SDRAM controller). This optimizes current drive capability and eliminates the need for noise countermeasures or damping resistors. The current drive capacity specifications can also be customized to fit application requirements before shipment (optional).

 

*LAPIS Semiconductor May 9 survey

  In addition, to meet the high reliability requirements for soldered joints in automotive circuits, copper lead frames are used, featuring a thermal expansion coefficient closer to that of the board compared with conventional 42-alloy lead frames, significantly improving solder joint reliability and resistance against thermal shock. Tin whisker occurrences during solder plating are also minimized.

LAPIS Semiconductor will continue to offer a long-term, stable supply of high-reliability SDRAM products while expanding its lineup to include 128Mbit SDRAM, 256Mbit SDRAM/DDR1, and 512Mbit SDRAM/DDR2.