器件名称: AK594096BGP-70
功能描述: 4,194,304 Word by 9 Bit CMOS Dynamic Random Access Memory
文件大小: 79.78KB 共2页
简 介:Accutek Microcircuit Corporation
DESCRIPTION
The Accutek AK594096 high density memory module is a CMOS random access memory organized in 4 Meg x 9 bit words. The assembly consists of two 4 Meg x 4 and one 4 Meg x 1 DRAMs, mounted on the front side of a printed circuit board in 30 pad SIM ( l eadl e s s ) o r 3 0 p i n S I P ( l e a d e d ) co n f i g u r a t i o n w i t h JEDEC-standard pinouts. Designed especially for low-height applications such as VMEbus boards, this low profile module is 0.550 inch high. The operation is identical to nine 4 Meg x 1 DRAMs. For the lower eight bits, data input is tied to data output and brought out separately for each bit, with common RAS and CAS control. This common I/O feature dictates the use of early-write cycles to prevent contention of data In and data out. Since the Write-Enable (WE)i signal must always go low before CAS in a write cycle, Read-Write and Read-Modify-Write operation is not possible. For the ninth bit, data in (D9) and data out (Q9) pins are brought our separately and controlled by a separate PCAS for that bit.
AK594096BS / AK594096BG 4,194,304 Word by 9 Bit CMOS Dynamic Random Access Memory
Front View 30-Pin SIM
+ +
30-Pin SIP
+ + 1
FEATURES
4,194,304 x 9 bit organization Low Profile 30 pad (SIM) Single In-Line Memory Low Profile 30 pin (SIP) Single In-Line package JEDEC standard pinout Common CAS, RAS and WE for the lower eight bits CAS-before-RAS refresh Refresh cycle 2048 cycles in 32 mSEC
Power 1.450 Wa……
