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AK594096BG Datasheet(PDF) 1 Page - ACCUTEK MICROCIRCUIT CORPORATION |
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AK594096BG Datasheet(HTML) 1 Page - ACCUTEK MICROCIRCUIT CORPORATION |
1 / 2 page DESCRIPTION The Accutek AK594096 high density memory module is a CMOS random access memory organized in 4 Meg x 9 bit words. The as- sembly 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 S IP (leaded) configuration with JEDEC-standard pinouts. Designed especially for low-height appli- cations 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 al- ways 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 con- trolled by a separate PCAS for that bit. 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 Watt Max Active, 70 nSEC 1.610 Watt Max Active, 60 nSEC 16.5 mWatt Max Standy · Operating free air temperature 0 0Cto700C · Downward compatible with AK591024 and AK59256 · Upward compatible with AK5916384 · Fast Page Mode and Static Column Mode versions available, nibble mode is not possible ACCUTEK MICROCIRCUIT CORPORATION AK594096BS / AK594096BG 4,194,304 Word by 9 Bit CMOS Dynamic Random Access Memory PIN NOMENCLATURE A0 -A10 Address Inputs RAS0 Row Address Strobe CAS Column Address Strobe WE Write Enable OE Output Enable DQ1 -DQ8 Data In/Data Out D9 Data In Q9 Data Out Vcc 5v Supply Vss Ground NC No Connect MODULE OPTIONS Leadless SIM: AK594096BS Leaded SIP: AK594096BG PIN ASSIGNMENT Pin # Symbol Pin # Symbol 1 Vcc 16 DQ5 2 CAS 17 A8 3DQ1 18 A9 4A0 19 A10 5A1 20 DQ6 6 DQ2 21 WE 7 A2 22 Vss 8A3 23 DQ7 9 Vss 24 NC 10 DQ3 25 DQ8 11 A4 26 NC 12 A5 27 RAS0 13 DQ4 28 NC 14 A6 29 NC 15 A7 30 Vcc + 1 1 30 + + + Front View 30-Pin SIM 30-Pin SIP FUNCTIONAL DIAGRAM * A- A DQ1 DQ2 DQ3 DQ4 010 RAS CAS WE OE * * * A- A DQ1 DQ2 DQ3 DQ4 09 RAS CAS WE OE * * * A- A D 011 RAS CAS WE Q * * * + WE + + CAS RAS A- A 010 + * * * * + + + + * * * + + + * + * + * + DQ1 DQ2 DQ3 DQ4 DQ5 DQ6 DQ7 DQ8 D9 Q9 * + PCAS 11 |
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