AK594096BS

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 (leadless) or 30 pin SIP (leaded) configuration with 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. + ACCUTEK AK594096BS / AK594096BG 4,194,304 Word by 9 Bit CMOS Dynamic Random Access Memory Front View 30-Pin SIM + 1 30 30-Pin SIP + + 1 · Refresh cycle 2048 cycles in 32 mSEC · Power 1.450 Watt Max Active, 70 nSEC 1.610 Watt Max Active, 60 nSEC 16.5 mWatt Max Standy · Operating free air temperature 00C to 700C · Downward compatible with AK591024 and AK59256 · Upward compatible with AK5916384 · Fast Page Mode and Static Column Mode versions availa...