WED3DG644V-D1

www.datasheet4u.com White Electronic Designs 32MB – 4Mx64 SDRAM, UNBUFFERED FEATURES „ „ „ „ „ „ „ „ „ PC100 and PC133 compatible Burst Mode Operation Auto and Self Refresh capability LVTTL compatible inputs and outputs Serial Presence Detect with EEPROM Fully synchronous: All signals are registered on the positive edge of the system clock Programmable Burst Lengths: 1, 2, 4, 8 or Full Page 3.3V ± 0.3V Power Supply 144 Pin SO-DIMM JEDEC D1: 27.94 (1.10”) WED3DG644V-D1 DESCRIPTION The WED3DG644V is a 4Mx64 synchronous DRAM module which consists of four 4Mx16 SDRAM components in TSOP II package, and one 2Kb EEPROM in an 8 pin TSOP package for Serial Presence Detect which are mounted on a 144 pin SO-DIMM multilayer FR4 Substrate. * This product is subject to change without notice. NOTE: Consult factory for availability of: RoHS compliant products Vendor source control options Industrial temperature option PIN CONFIGURATIONS (FRONT SIDE/BACK SIDE) Pin Front Pin Back Pin Front Pin Back 1 VSS 2 VSS 51 DQ14 52 DQ46 3 DQ0 4 DQ32 53 DQ15 54 DQ47 56 VSSv 5 DQ1 6 DQ33 55 VSS 7 DQ2 8 DQ34 57 NC 58 NC 9 DQ3 10 DQ35 59 NC 60 NC 12 VCC 11 VCC 13 DQ4 14 DQ36 VOLTAGE KEY 15 DQ5 16 DQ37 17 DQ6 18 DQ38 61 CLK0 62 CKE0 19 DQ7 20 DQ39 63 VCC 64 VCC 21 VSS 22 VSS 65 RAS# 66 CAS# 23 DQM0 24 DQM4 67 WE# 68 *CKE1 25 DQM1 26 DQM5 69 CS0# 70 *A12 27 VCC 28 VCC 71 *CS1# 72 *A13 29 A0 30 A3 73 DNU 74 *CK1 31 A1 32 A4 75 VSS 76 VSS 33 A2 34 A5 77 NC 78 NC 36 VSS 79 NC 80 NC 35 VSS 37 DQ8 38 DQ...