AK591024AS ACCUTEK | Alldatasheet
Document overview
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Technical content
DESCRIPTION
The Accutek AK591024 high density memory modules is a random access memory organized in 1 Meg x 9 bit words. The assembly consists of two 1 Me g x 4 and one 1 Meg x 1 DRAMs in surface mount packages mounted on the front side of a printed circuit board. The module can be configured as a leadless 30 pad SIM or a leaded 30 pin SIP. This packaging approach provides a better than 6 to 1 density increase over standard DIP packaging. The operation of the AK591024 is identical to two 1 Meg x 4 plus one 1 Meg x 1 DRAMs. For the lower eight bits, the data input is tied to data output and 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 conten- tion of D and Q. Since the Write-Enable (WE) signal must always go low before CASin a write cycle, Read-Write and Read-Modify-Write operation is not possible. For the ninth bit, the data input (D 9) and data output (Q9) pins are brought out separately and controlled by a separate PCAS for that bit. Bit nine is generally used for parity.
FEATURES
/c1831,048,576 x 9 bit organization /c183Optional 30 Pad SIM (Single In-Line Module) or 30 Pin leaded SIP (Single In-Line Package) /c183JEDEC standard pinout /c183Common CAS, RAS and WE control for the lower eight bits /c1831024 refresh cycles/16ms /c183Separate PCAS control for D9 and Q9 /c183Power:
1.650 Watt Max Active (60 nS)
1.485 Watt Max Active (70 nS)
1.265 Watt Max Active (80 nS)
23.5 mWatt Standby (max) /c183Operating free air temperature: 0 o to 70oC /c183Upward compatible with and AK594096 and AK5916384 /c183Downward compaitble with AK59256 /c183Functionally and Pin compatible with AK491024 Accutek Microcircuit Corporation AK591024AS / AK591024AG 1,048,576 Word X 9 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 D9 Data In Q9 Data Out A0 -A 9 Address Inputs CAS, PCAS Column Address Strobe RAS Row Address Strobe WE Write Enable Vcc 5v Supply Vss Ground NC No Connect MODULE OPTIONS Leadless SIM: AK591024ASP Leaded SIP: AK591024AGP 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 Q9
12 A5 27 RAS
13 DQ4 28 PCAS
14 A6 29 D9
15 A7 30 Vcc
D RAS CAS WE Q +WE +CAS RAS A- A09 + *+ * DQ1 DQ2 DQ3 DQ4 DQ5 DQ6 DQ7 DQ8 +PCAS
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)
50 = 50 nS 8 = 8 nS 60 = 60 nS 10 = 10 nS 70 = 70 nS 12 = 12 nS 80 = 80 nS 15 = 15 nS 130 Do Not Install 1 + Do Not Install 0.200"MAX 0.0530.047 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: 978-462-3396 Email: sales@accutekmicro.com Internet: www.accutekmicro.com 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 show as examples of the most widely used variations. Contact Accutek if other information is required. EXAMPLES: AK591024AGP-60