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Accutek Microcircuit Corporation
DESCRIPTION
The Accutek AK62464 SRAM Module consists of fast high performance SRAMs mounted on a low profile, 64 pin ZIP Board. The module utilizes six 28 pin 64K x 4 SRAMs in 300 mil SOJ packages and three decoupling capacitors mounted on the top side and two 28 pin 64K x 4 SRAMs in 300 mil SOJ packages and three decoupling capacitors mounted on the bottom side of a printed circuit board. The SRAMs used have common I/O functions and single output enable functions. Also, three separate chip select (CE) connections are used to independently enable the three bytes. The modules can be supplied in a variety of access time values from 8nSEC to 20nSEC in CMOS or BiCMOS technology. The Accutek module is designed to have a maximum seated height of 0.500 inch to provide for the lowest height off the board. The modules conform to JEDEC - standard sizes and pin-out configurations. Using two pins for module memory density identification, PD0 and PD1, minimizes interchangeability and design considerations when changing from one module size to the other in customer applications.
64
AK62464Z 65,536 x 24 Bit CMOS/BiCMOS Static Random Access Memory
64-Pin ZIP
Front View
1
32
33
64
Rear View
33
32
1
FEATURES
* 65,536 x 24 bit organization * JEDEC Standard 64 pin ZIP format * Common I/O, single OE functions with four separate chip selects (CE) * Low height 0.500 inch maximum * Upward compatible with
* Presence Detect, PD0 and PD1 for identifying module density * Fast Access Times range from 8 nSEC BiCMOS to 20 nSEC CMOS * TTL-compatible inputs and outputs * Single 5 volt power supply - AK62464Z * Single 3.3 volt power supply - AK62464Z/3.3 * Operating temperature range in free air, 00C to 700C * Power 900 mA Max Active (12 nS) 840 mA Max Active (15 nS) 780 mA Max Active (20 nS) 240 mA Max Standby (Cycling) 12 mA Max Standby (f=0MHZ)
PIN NOMENCLATURE
A0 - A15 CE1 - CE3 DQ1 - DQ24 OE PD0 - PD1 Vcc Vss WE NC Address Inputs Chip Enable Data In/Data Out Output Enable Presence Detect Power Supply Ground Write Enable No Connect
PIN ASSIGNMENT
PIN # SYMBOL PIN # SYMBOL PIN # SYMBOL PIN # SYMBOL
FUNCTIONAL DIAGRAM
NC CE3 NC NC OE Vss DQ13 DQ17 DQ14 DQ18 DQ15 DQ19 DQ16 DQ20 A3 A10 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 A4 A11 A5 A12 Vcc A13 A6 DQ21 NC DQ22 NC DQ23 NC DQ24 NC Vss
1 2 3 4 5 6 7 8 9 10 11 12 13
Vss PD0 PD1 DQ1 NC DQ2 NC DQ3 NC DQ4 NC Vcc A0 A7 A1 A8
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
A2 A9 DQ9 DQ5 DQ10 DQ6 DQ11 DQ7 DQ12 DQ8 Vss WE A15 A14 CE2 CE1
33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48
MODULE OPTIONS
Leadless ZIP: AK62464Z
14 15 16
PD0 = Open PD1 = Vss
ORDERING INFORMATION PART NUMBER CODING INTERPRETATION
Position 1 2 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 50 = 50 nS 12 = 12 nS 60 = 60 nS 15 = 15 nS 70 = 70 nS 20 = 20 nS 80 = 80 nS 25 = 25 nS
1 2 3 4 5 6 7 8
MECHANICAL DIMENSIONS
Inches
Top View ZIP
1
2 3 4 5 6
3
59
60 61 62 64 63
4
.050 x .050 ANGLE NOTCH
0.125 0.155
5
0.500 MAX 1
C L 0.120 0.130
6
CC LL
7
0.050 TYP 3.595 3.605
CC LL
8
0.100 TYP 64
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.
0.100 TYP
EXAMPLES:
AK62464Z-12 64K x 24, 12 nSEC SRAM Module, ZIP Configuration
CC LL
0.350 MAX
ACCUTEK MICROCIRCUIT CORPORATION BUSINESS CENTER at NEWBURYPORT 2 NEW PASTURE ROAD, SUITE 1 NEWBURYPORT, MA 01950-4054 PHONE: 978-465-6200 FAX: 978-462-3396 E-mail: 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 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.

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