Accutek Microcircuit Corporation AK532256W 262,144 Word by 32 Bit CMOS Dynamic Random Access Memory DESCRIPTION The Accutek AK532256W high density memory module is a CMOS dynamic RAM organized in 256K x 32 bit words. The module consists of eight standard 256K x 4 DRAMs in plastic SOJ packages. The assembly has eight drams mounted on the front side of a printed circuit board in a 72 pad leadless SIM configuration. The operation of the AK532256W is identical to eight 256K x 4 DRAMs. There are four CAS lines and two RAS lines. Independent byte control is accomplished by four CAS lines. Each seperate CAS line controls two 256K x 4 Drams to form an 8 bit byte. The bank of 32 bits is controlled by the two RAS lines. A sixteen bit data path can be produced by connecting DQ1 to DQ17, DQ2 to DQ18 and alternately strobing RAS0 with RAS2. + + · Available in Fast Page Mode, EDO and Static Column Mode versions FEATURES · Available in leadless SIM or leaded Zip versions · 262,144 x 32 bit organization · Upward compatible with AK532512, AK5321024, AK5322048, AK5324096 and AK5328192 · 72 pin Single In-Line Module · Multiple CAS and RAS lines allow x16 or x32 bit widths · CAS-before-RAS Refresh, RAS-only Refresh or Hidden refresh o o ADDITIONAL OPTIONS AVAILABLE · Operating free air temperature 0 C to 70 C · 512K x 32 version, AK532512 · Single 5 Volt Power Supply · 1 Meg x 32 version, AK5321024 · 512 Refresh Cycles, 8mSEC · 2 Meg x 32 version, AK5322048 · Power 2.00 Watt Max Active (60nS) 1.78 Watt Max Active (70 nS) 1.562 Watt Max Active (80 nS) 44 mW Max Standby · 4 Meg x 32 version, AK5324096 · 8 Meg x 32 version, AK5328192 PIN NOMENCLATURE PIN ASSIGNMENT A0 - A8 Address Inputs DQ1 - DQ32 Data In/Data Out CAS0 - CAS3 Column Address Strobe RAS0, RAS2 Row Address Strobe WE Write Enable PD1 - PD4 Presence Detect Vcc 5v Supply Vss Ground NC No Connect PIN # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 MODULE OPTIONS Leadless SIM: AK532256W SYMBOL Vss D1 DQ17 DQ2 DQ18 DQ3 DQ19 DQ4 DQ20 Vcc NC A0 A1 A2 A3 A4 A5 A6 PIN # 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 SYMBOL NC DQ5 DQ21 DQ6 DQ22 DQ7 DQ23 DQ8 DQ24 A7 NC Vcc A8 NC NC RAS2 NC NC Presence Detect - Leaded ZIP: AK532256WZ PD1 PD2 PD3 PD4 -60 Vss NC NC NC -70 Vss NC Vss NC -80 Vss NC NC Vss PIN # 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 SYMBOL NC NC Vss CAS0 CAS2 CAS3 CAS1 RAS0 NC NC WE NC DQ9 DQ25 DQ10 DQ26 DQ11 DQ27 PIN # 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 SYMBOL DQ12 DQ28 DQ13 DQ29 Vcc DQ30 DQ14 DQ31 DQ15 DQ32 DQ16 NC PD1 PD2 PD3 PD4 NC Vss A0 - A8 RAS CAS DQ0 - DQ3 WE OE DQ24 - DQ27 A0 - A8 RAS CAS DQ0 - DQ3 WE OE DQ20 - DQ23 A0 - A8 RAS CAS DQ0 - DQ3 WE OE DQ16 - DQ19 A0 - A8 RAS CAS DQ0 - DQ3 WE OE DQ12 - DQ15 A0 - A8 RAS CAS DQ0 - DQ3 WE OE DQ8 - DQ11 A0 - A8 RAS CAS DQ0 - DQ3 WE OE DQ4 - DQ7 A0 - A8 RAS CAS DQ0 - DQ3 WE OE DQ0 - DQ4 OE OE CAS3 OE OE RAS2 CAS2 OE OE CAS1 OE OE A0 - A8 RAS0 CAS0 WE 9 A0 - A8 RAS CAS DQ0 - DQ3 WE OE DQ28 - DQ31 FUNCTIONAL DIAGRAM MECHANICAL DIMENSIONS 4.250" 0.200" MAX 3.985" 1.000" MAX 0.425" 0.375" + + 0.250" 0.080" 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 Email: [email protected] Internet: www.accutekmicro.com 0.050" TYP 0.125" CL CL CL CL 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.