AK581024AG ACCUTEK | Alldatasheet

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Technical content

DESCRIPTION

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 stan- dard DIP packaging. 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 al- ways go low before CAS in a write cycle, Read-Write and Read-Modify-Write operation is not possible.

FEATURES

/c1831 Meg x 8 bit organization /c183Optional 30 Pad SIM (Single In-Line Module) or 30 Pin leaded SIP (Single In-Line Package) /c183JEDEC approved pinout /c183Common CAS, RAS and WE control for eight DQ lines /c183Separate CAS control for one separate pair of D and Q lines /c1831024 refresh cycles/16ms, A0 to A9 /c1831.10 Watt active and 23.5 mWatt standby (max) /c183Operating free air temperature: 0 0 to 700C /c183Upward compatible with AK584096 and AK5816384 /c183Functionally and Pin compatible with AK481024 /c183Available with access times of 60 to 100 nS Accutek Microcircuit Corporation AK581024AG / AK581024AS 1,048,576 x 8 bit CMOS Dynamic Random Access Memory 1 30 + + Front View 30-Pin SIM 30-Pin SIP PIN NOMENCLATURE DQ1 -D Q8 Data In/Data Out A0 -A 9 Address Inputs CAS Column Address Strobe RAS Row Address Strobe WE Write Enable Vcc 5v Supply Vss Ground NC No Connect MODULE OPTIONS Leadless SIM: AK581024ASP Leaded SIP: AK581024AGP PIN ASSIGNMENT PIN # SYMBOL PIN # SYMBOL

1 Vcc 16 DQ5

2 CAS 17 A8

3 DQ1 18 A9

5 A1 20 DQ6

6 DQ2 21 WE

7 A2 22 Vss

8 A3 23 DQ7

9 Vss 24 NC

10 DQ3 25 DQ8

11 A4 26 NC

12 A5 27 RAS

13 DQ4 28 NC

14 A6 29 NC

15 A7 30 Vcc

ORDERING INFORMATION

PART NUMBER CODING INTERPRETATION Position 12345678

1 Product

AK = Accutek Memory

2 Type

4 = Dynamic RAM 5 = CMOS Dynamic RAM 6 = Static RAM

3 Organization/Word Width

1 = by 1 16 = by 16 4 = by 4 32 = by 32 8 = by 8 36 = by 36 9 = by 9

4 Size/Bits Depth

64 = 64K 4096 = 4 MEG 256 = 256K 8192 = 8 MEG 1024 = 1 MEG 16384 = 16 MEG

5 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)

6 Special Designation

P = Page Mode N = Nibble Mode K = Static Column Mode W = Write Per Bit Mode V = Video Ram

7 Separator

  • = Commercial 0 0Ct o+ 7 00C M = Military Equivalent Screened (-550C to +1250C) I = Industrial Temperature Tested (-450Ct o+ 8 50C) X = Burned In

8 Speed (first two significant digits)

60 = 60 nS 12 = 12 nS 70 = 70 nS 15 = 15 nS 80 = 80 nS 20 = 20 nS 130 1 + 0.200"MAX0.0530.047 3.5103.490 0.2600.240 0.0850.075 0.3250.275 0.100T.P. 0.100 TYP 0.5050.495 0.100T.P. 3.1103.090 0.0240.016 0.100TYP 0.5050.495 ACCUTEK MICROCIRCUIT CORPORATION BUSINESS CENTER at NEWBURYPORT

2 NEW PASTURE ROAD, SUITE 1

NEWBURYPORT, MA 01950-4054 VOICE: 978-465-6200 FAX:9 78-462-3396 Email: sales@accutekmicro.com Internet: www.accutekmicro.com EXAMPLES: AK581024ASP-60

1 Meg x 8, Dynamic RAM, Leadless SIM, Page Mode, Commercial,

1 Meg x 8, Dynamic RAM, Leaded SIP, Page Mode Commercial,

Accutek reserves the right to make changes in specifications at any time and without notice. Accutek does not assume any responsibil- ity for the use of any circuitry described; no circuit patent licenses are implied. Preliminary data sheets contain minimum and maxi - mum limits based upon design objectives, which are subject to change upon full characterization over the specific operating condi- tions. MECHANICAL DIMENSIONS Inches The numbers and coding on this page do not include all variations available, but are shown as examples of the most widely used varia- tions. Contact Accutek if other information is required.