记忆存储器有两大类,一种称为静态RAM(Static RAM/SRAM),SRAM速度非常快,是目前读写较快的存储设备了,但是它也非常昂贵,所以只在要求很苛刻的地方使用,譬如CPU的一级缓冲,二级缓冲。另一种称为动态RAM(Dynamic RAM/DRAM),DRAM保留数据的时间很短,速度也比SRAM慢,不过它还是比任何的ROM都要快,但从价格上来说DRAM相比SRAM要便宜很多,计算机内存就是DRAM的。 Density Org. Temp. Vcc(V) Speed(ns) C/S Option Package Packing Status P/N 1Mbit 128K x 8 Industrial 3.3 45/55 2C/S 32sTSOP1/32TSOP1/32SOP Tray MP VTI501NB08 1Mbit 128K x 8 Industrial 5.0 45/55 2C/S 32sTSOP1/32TSOP1/32SOP Tray MP VTI501HB08 1Mbit 64K x 16 Industrial 3.3 45/55 1C/S 44TSOP2/48BGA Tray MP VTI501NL16 1Mbit 64K x 16 Industrial 5.0 45/55 1C/S 44TSOP2/48BGA Tray MP VTI501HL16 2Mbit 256K x 8 Industrial 3.3 45/55 1C/S 36BGA Tray MP VTI502NL08 2Mbit 256K x 8 Industrial 3.3 45/55 2C/S 32sTSOP1/32TSOP1/32TSOP2/32SOP Tray MP VTI502NB08 2Mbit 256K x 8 Industrial 5.0 45/55 2C/S 32sTSOP1/32TSOP1/32TSOP2/32SOP Tray MP VTI502HB08 2Mbit 128K x 16 Industrial 3.3 45/55 1C/S 44TSOP2/48BGA Tray MP VTI502NL16 2Mbit 128K x 16 Industrial 3.3 45/55 2C/S 48BGA Tray MP VTI502NB16 2Mbit 128K x 16 Industrial 5.0 45/55 1C/S 44TSOP2 Tray MP VTI502HL16 4Mbit 512K x 8 Industrial 3.3 45/55 1C/S 32sTSOP1/32TSOP1/32TSOP2/32SOP Tray MP VTI504NL08 4Mbit 512K x 8 Industrial 5.0 45/55 1C/S 32sTSOP1/32TSOP1/32TSOP2/32SOP Tray MP VTI504HL08 4Mbit 256K x 16 Industrial 3.3 45/55 1C/S 44TSOP2/48BGA Tray MP VTI504NL16 4Mbit 256K x 16 Industrial 3.3 45/55 2C/S 44TSOP2/48BGA Tray MP VTI504NB16 4Mbit 256K x 16 Industrial 5.0 45/55 1C/S 44TSOP2 Tray MP VTI504HL16 4Mbit 256K x 16 Industrial 5.0 45/55 2C/S 44TSOP2 Tray MP VTI504HB16 8Mbit 1M x 8 Industrial 3.3 45/55 2C/S 44TSOP2/48BGA Tray MP VTI508NB08 8Mbit 1M x 8 Industrial 5.0 45/55 2C/S 44TSOP2/48BGA Tray MP VTI508HB08 8Mbit 512K x 16 Industrial 3.3 45/55 1C/S 44TSOP2/48BGA Tray MP VTI508NL16 8Mbit 512K x 16 Industrial 3.3 45/55 2C/S 44TSOP2/48BGA Tray MP VTI508NB16 8Mbit 512K x 16 Industrial 5.0 45/55 1C/S 44TSOP2/48BGA Tray MP VTI508HL16 8Mbit 512K x 16 Industrial 5.0 45/55 2C/S 48BGA Tray MP VTI508HB16 16Mbit 1M x 16 Industrial 3.3 45/55 2C/S 48BGA Tray MP VTI516NB16