Datasheet > EM422M1684RBA-7FE

EM422M1684RBA-7FE

更新时间： 2024-02-29 05:10:37

品牌	Logo	应用领域
EOREX		动态存储器双倍数据速率
页数	文件大小	规格书
19页	293K
描述
256Mb (4M】4Bank】16) Double DATA RATE SDRAM

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eorex

Preliminary

EM42AM1684RBA

256Mb (4M×4Bank×16)

Double DATA RATE SDRAM

Features

Description

• Internal Double-Date-Rate architecture with 2

Accesses per clock cycle.

The EM42AM1684RBA is high speed Synchronous

graphic RAM fabricated with ultra high performance

CMOS process containing 268,435,456 bits which

organized as 4Meg words x 4 banks by 16 bits.

The 256Mb DDR SDRAM uses a double data rate

architecture to accomplish high-speed operation.

The data path internally prefetches multiple bits and

It transfers the datafor both rising and falling edges

of the system clock.It means the doubled data

bandwidth can be achieved at the I/O pins.

• Single 2.5V 0.2V Power Supply

• 2.5V SSTL-2 compatible I/O

• Burst Length (B/L) of 2, 4, 8

• 2,2.5,3 Clock read latency

• Bi-directional,intermittent data strobe(DQS)

• All inputs except data and DM are sampled

at the positive edge of the system clock.

• Data Mask (DM) for write data

• Sequential & Interleaved Burst type available

• Auto Precharge option for each burst accesses

• DQS edge-aligned with data for Read cycles

• DQS center-aligned with data for Write cycles

• DLL aligns DQ & DQS transitions with CLK

transition

Available packages: FBGA-60B(12mmx10mm).

• Auto Refresh and Self Refresh

• 8,192 Refresh Cycles / 64ms

Ordering Information

Part No

Organization

Max. Freq

Package

Grade

EM42AM1684RBA-75F

16M X 16

133MHz/DDR266 @CL3

BGA-60B Commercial Free

EM42AM1684RBA-6F

16M X 16

166MHz/DDR333 @CL3

* EOREX reserves the right to change products or specification without notice.

Jul. 2006

www.eorex.com

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