AK581024AG / AK581024AS 1,048,576 x 8 bit CMOS Dynamic Random Access Memory ACCUTEK MICROCIRCUIT CORPORATION DESCRIPTION Front View The Accutek AK581024 high density memory modules is a random access memory organized in 1 Meg x 8 bit words. The assembly consists of two 1 Meg x 4 DRAMs in surface mount packages mounted to a printed circuit board. The module can be configured as a leadless 30 pad SIMM or a leaded 30 pin SIP. This packaging approach provides a better than 6 to 1 density increase over standard DIP packaging. 30-Pin SIM + + 30 1 The operation of the AK581024 is identical to two 1 Meg x 4 DRAMs. The data input/output is brought out separately for each 1 Meg x 4 device, with common RAS, CAS and WE control. The OE pins are tied to Vss which dictates the use of early-write cycles to prevent contention of D and Q. Since the Write-Enable (WE) signal must always go low before CAS in a write cycle, Read-Write and Read-Modify-Write operation is not possible. 30-Pin SIP + + 1 FEATURES · 1 Meg x 8 bit organization · 1.10 Watt active and 23.5 mWatt standby (max) · Optional 30 Pad SIM (Single In-Line Module) or 30 Pin leaded SIP (Single In-Line Package) · Operating free air temperature: 00 to 700C · JEDEC approved pinout · Upward compatible with AK584096 and AK5816384 · Functionally and Pin compatible with AK481024 · Common CAS, RAS and WE control for eight DQ lines · Separate CAS control for one separate pair of D and Q lines · Available with access times of 60 to 100 nS · 1024 refresh cycles/16ms, A0 to A9 PIN NOMENCLATURE FUNCTIONAL DIAGRAM PIN # SYMBOL PIN # SYMBOL 1 Vcc 16 DQ5 Address Inputs 2 CAS 17 A8 Column Address Strobe 3 DQ1 18 A9 4 A0 19 NC DQ6 DQ1 - DQ8 Data In/Data Out A0 - A9 CAS PIN ASSIGNMENT RAS Row Address Strobe 5 A1 20 WE Write Enable 6 DQ2 21 WE Vcc 5v Supply 7 A2 22 Vss Vss Ground 8 A3 23 DQ7 9 Vss 24 NC NC No Connect 10 DQ3 25 DQ8 11 A4 26 NC 12 A5 27 RAS 13 DQ4 28 NC 14 A6 29 NC 15 A7 30 Vcc MODULE OPTIONS Leadless SIM: AK581024ASP Leaded SIP: AK581024AGP EXAMPLES: ORDERING INFORMATION AK581024ASP-60 PART NUMBER CODING INTERPRETATION Position 1 2 3 4 5 6 7 8 AK581024AGP-70 1 Meg x 8, Dynamic RAM, Leaded SIP, Page Mode Commercial, 70 nSEC AccessTime MECHANICAL DIMENSIONS Inches 0.260 0.240 0.085 0.075 0.325 0.275 0.505 0.495 + 1 + 1 0.100 T.P. 3.510 3.490 3.110 3.090 + 30 + Product AK = Accutek Memory Type 4 = Dynamic RAM 5 = CMOS Dynamic RAM 6 = Static RAM Organization/Word Width 1 = by 1 16 = by 16 4 = by 4 32 = by 32 8 = by 8 36 = by 36 9 = by 9 Size/Bits Depth 64 = 64K 4096 = 4 MEG 256 = 256K 8192 = 8 MEG 1024 = 1 MEG 16384 = 16 MEG Package Type G = Single In-Line Package (SIP) S = Single In-Line Module (SIM) D = Dual In-Line Package (DIP) W = .050 inch Pitch Edge Connect Z = Zig-Zag In-Line Package (ZIP) Special Designation P = Page Mode N = Nibble Mode K = Static Column Mode W = Write Per Bit Mode V = Video Ram Separator - = Commercial 00C to +700C M = Military Equivalent Screened (-550C to +1250C) I = Industrial Temperature Tested (-450C to +850C) X = Burned In Speed (first two significant digits) DRAMS SRAMS 60 = 60 nS 12 = 12 nS 70 = 70 nS 15 = 15 nS 80 = 80 nS 20 = 20 nS 1 Meg x 8, Dynamic RAM, Leadless SIM, Page Mode, Commercial, 60 nSEC Access Time 0.024 0.016 8 4 0.100 T.P. 7 3 0.100 TYP 6 2 0.505 0.495 5 1 0.100 TYP 0.200" MAX ACCUTEK MICROCIRCUIT CORPORATION 5 NEW PASTURE ROAD NEWBURYPORT, MA 01950-4040 PHONE: 978-465-6200 FAX: 978-462-3396 Email: [email protected] Internet: www.accutekmicro.com 0.053 0.047 The numbers and coding on this page do not include all variations available, but are shown as examples of the most widely used variations. Contact Accutek if other information is required. Accutek reserves the right to make changes in specifications at any time and without notice. Accutek does not assume any responsibility for the use of any circuitry described; no circuit patent licenses are implied. Preliminary data sheets contain minimum and maximum limits based upon design objectives, which are subject to change upon full characterization over the specific operating conditions.