北京航天新兴销售总部 （非本站正式会员）

The 512Mb SDRAM is a high speed CMOS, dynamic
random-access memory designed to operate in 3.3V Vdd
and 3.3V Vddq memory systems containing 536,870,912
bits. Internally configured as a quad-bank DRAM with
a synchronous interface. Each 134,217,728-bit bank is
organized as 8,192 rows by 512 columns by 32 bits
The 512Mb SDRAM includes an AUTO REFRESH MODE,
and a power-saving, power-down mode. All signals are
registered on the positive edge of the clock signal, CLK.
All inputs and outputs are LVTTL compatible.
The 512Mb SDRAM has the ability to synchronously burst
data at a high data rate with automatic column-address
generation, the ability to interleave between internal banks
to hide precharge time and the capability to randomly
change column addresses on each clock cycle during
burst access.
A self-timed row precharge initiated at the end of the burst
sequence is available with the AUTO PRECHARGE function
enabled. Precharge one bank while accessing one of the
other three banks will hide the precharge cycles and provide
seamless, high-speed, random-access operation.
SDRAM read and write accesses are burst oriented starting
at a selected location and continuing for a programmed
number of locations in a programmed sequence. The
registration of an ACTIVE command begins accesses,
followed by a READ or WRITE command. The ACTIVE
command in conjunction with address bits registered are
used to select the bank and row to be accessed (BA0,
BA1 select the bank; A0-A12 select the row). The READ
or WRITE commands in conjunction with address bits
registered are used to select the starting column location
for the burst access.
Programmable READ or WRITE burst lengths consist of
1, 2, 4 and 8 locations or full page, with a burst terminate
option.

公司背景及现状

北京航天新兴科技开发有限责任公司成立于 1996年，是一家以集成电路为主要经营产品的电子商务公司。有近20年的IC从业经验，代理、分销近50个品牌，产品应用领域涵盖了工业控制，电力电气，安防监控，通信通讯，汽车电子，仪器仪表等多个领域。多年来公司在总公司的大力支持下，先后在深圳、上海、香港等地设立了分公司及办事处

公司价值观

专业专注，通过渠道控制来保证货物的可追溯性

公司业务特点

（1）     独特的订货渠道，确保价格优势

（2）     专业的服务团队，及时解决市场及技术问题

（3）     大量的现货库存，强大的备货支持

（4）     快速的物流反应能力，保证急需料的及时供应