Accutek Microcircuit Corporation AK532256AW 262,144 Word by 32 Bit CMOS Dynamic Random Access Memory DESCRIPTION The Accutek AK532256AW high density memory module is a CMOS dynamic RAM organized in 265K x 32 bit words. The module consists of two standard 256K x 16 bits DRAMs in plastic SOJ packages. The assembly has 2 DRAMs mounted on the front side of a printed circuit board in a 72 pad leadless SIM configuration. This configuration allows socket-mounting of large quantities of memory in applications where high density and ease of inserting additional memory are important. 72 1 The operation of the AK532256AW is identical to eight 256K x 4 Drams. There are four CAS lines and two RAS lines. On each bank of 256K x 32, independent byte control is accomplished by four CAS lines. Each seperate CAS line controls one byte of the 256K x 16 Dram. FEATURES · 262,144 x 32 bit organization · Available in Fast Page Mode or EDO · 72 pad Single In-Line Module · Upward compatible with AK532512W, AK5321024W, AK5322048W, AK5324096W and AK5328192W · CAS-before-RAS, RAS-only or hidden refresh · Operating free air temperature 0oC to 70oC ADDITIONAL OPTIONS AVAILABLE · Single 5 Volt Power Supply · 1024 Refresh Cycles, 16 mSEC · 256K x 36 version, AK536256W · Available in Fast Page Mode · 512K x 32 version, AK532512W · Power: 2.090 Watt Max Active (50 nS) 1.870 Watt Max Active (60 nS) 1.760 Watt Max Active (70 nS) 22 mW Max Standby · 512K x 36 version, AK536512W PIN NOMENCLATURE PIN ASSIGNMENT DQ0 - DQ31 Data In/Data Out A0 - A8 Address Inputs 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: AK532256AW SYMBOL Vss DQ0 DQ16 DQ1 DDQ17 DQ2 DQ18 DQ3 DQ19 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 DQ4 DQ20 DQ5 DQ21 DQ6 DQ22 DQ7 DQ23 A7 NC Vcc A8 NC NC RAS2 NC NC Presence Detect - Leaded ZIP: AK532256AZ 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 DQ8 DQ24 DQ9 DQ25 DQ10 DQ26 PIN # 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 SYMBOL DQ11 DQ27 DQ12 DQ28 Vcc DQ29 DQ13 DQ30 DQ14 DQ31 DQ15 NC PD1 PD2 PD3 PD4 NC Vss DQ24 DQ25 + DQ26 + DQ27 + DQ28 + DQ29 + DQ30 + DQ31 + + UCAS CAS3 + WE LCAS CAS2 + OE RAS RAS2 + DQ8 DQ7 DQ10 DQ11 DQ12 DQ13 DQ14 DQ15 + DQ0 DQ1 DQ2 DQ3 DQ4 DQ5 DQ6 DQ7 A0 - A8 WE + WE UCAS CAS1 + OE LCAS CAS0 + + DQ8 DQ7 + DQ10 + DQ11 + DQ12 + DQ13 + DQ14 + DQ15 + RAS RAS0 + DQ8 DQ7 DQ10 DQ11 DQ12 DQ13 DQ14 DQ15 + DQ0 DQ1 + DQ2 + DQ3 + DQ4 + DQ5 + DQ6 + DQ7 + + DQ0 DQ1 DQ2 DQ3 DQ4 DQ5 DQ6 DQ7 A0 - A8 A0 - A8 + DQ16 DQ17 + DQ18 + DQ19 + DQ20 + DQ21 + DQ22 + DQ23 FUNCTIONAL DIAGRAM MECHANICAL DIMENSIONS 4.250" 3.985" + + 0.700" MAX 0.425" 0.375" 0.250" 0.200" MAX 72 72 1 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 E-Mail: [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.