Functional Description

The DDR SDRAM uses a double data rate architecture to achieve high-speed operation. The double data rate architecture is essentially a 2n-prefetch architecture with an interface designed to transfer two data words per clock cycle at the I/O pins. A single read or write access for the DDR SDRAM effectively consists of a single 2n-bit-wide, one-clockcycle data transfer at the internal DRAM core and two corresponding n-bit-wide, onehalf-clock-cycle data transfers at the I/O pins.

Features

• VDD = +2.5V ±0.2V, VDDQ = +2.5V ±0.2V

• VDD = +2.6V ±0.1V, VDDQ = +2.6V ±0.1V (DDR400)

• Bidirectional data strobe (DQS) transmitted/

received with data, i.e., source-synchronous data

capture (x16 has two – one per byte)

• Internal, pipelined double-data-rate (DDR)

architecture; two data accesses per clock cycle

• Differential clock inputs (CK and CK#)

• Commands entered on each positive CK edge

• DQS edge-aligned with data for READs; centeraligned with data for WRITEs

• DLL to align DQ and DQS transitions with CK

• Four internal banks for concurrent operation

• Data mask (DM) for masking write data

(x16 has two – one per byte)

• Programmable burst lengths: 2, 4, or 8

• Auto refresh

– 64ms, 8192-cycle(Commercial and industrial)

– 16ms, 8192-cycle (Automotive)

• Self refresh (not available on AT devices)

• Longer-lead TSOP for improved reliability (OCPL)

• 2.5V I/O (SSTL_2 compatible)

• Concurrent auto precharge option is supported

• tRAS lockout supported (tRAP = tRCD)

MT46V64M8TG-75属于集成电路（IC） > 存储器。美国镁光科技有限公司制造生产的MT46V64M8TG-75存储器存储器是集成电路上用作数据存储设备的半导体器件。这些器件分为非易失性或易失性两种，格式包括 CBRAM、DRAM、EEPROM、EERAM、EPROM、闪存、FRAM、NVSRAM、PCM (PRAM)、PSRAM、RAM 和 SRAM。这些器件的存储容量为 64 b 至 6 Tb 不等，接口有 I2C、MMC、并行、eMMC、串行、单线、SPI、UFS、Xccela 总线和 1-线。