PDF WED3DG649V-D2 Data sheet ( Hoja de datos )

Número de pieza	WED3DG649V-D2
Descripción	64MB- 8M x 64 SDRAM UNBUFFERED
Fabricantes	White Electronic Designs
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No Preview Available ! Whitewww.datasheet4u.com Electronic Designs WED3DG649V-D2 64MB- 8M x 64 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 168 pin DIMM JEDEC DESCRIPTION The WED3DG649V is a 8M x 64 synchronous DRAM module which consists of four 8M x 16 SDRAM components in TSOP II package and one 2K EEPROM in an 8 pin TSSOP package for Serial Presence Detect which are mounted on a 168 pin DIMM multilayer FR4 Substrate. This product is under development, is not qualiﬁed or characterized and is subject to change or cancellation without notice. PIN CONFIGURATIONS (FRONT SIDE/BACK SIDE) Pin Front Pin Front Pin Front Pin Back Pin Back Pin 1 VSS 29 DQM1 57 DQ18 85 VSS 113 DQM5 141 2 DQ0 30 CS0# 58 DQ19 86 DQ32 114 CS1# 142 3 DQ1 31 DNU 59 VCC 87 DQ33 115 RAS# 143 4 DQ2 32 VSS 60 DQ20 88 DQ34 116 VSS 144 5 DQ3 33 A0 61 NC 89 DQ35 117 A1 145 6 VCC 34 A2 62 NC 90 VCC 118 A3 146 7 DQ4 35 A4 63 NC 91 DQ36 119 A5 147 8 DQ5 36 A6 64 VSS 92 DQ37 120 A7 148 9 DQ6 37 A8 65 DQ21 93 DQ38 121 A9 149 10 DQ7 38 A10/AP 66 DQ22 94 DQ39 122 BA0 150 11 DQ8 39 BA1 67 DQ23 95 DQ40 123 A11 151 12 VSS 40 VCC 68 VSS 96 VSS 124 VCC 152 13 DQ9 41 VCC 69 DQ24 97 DQ41 125 NC 153 14 DQ10 42 CK0 70 DQ25 98 DQ42 126 NC 154 15 DQ11 43 VSS 71 DQ26 99 DQ43 127 VSS 155 16 DQ12 44 DNU 72 DQ27 100 DQ44 128 CKE0 156 17 DQ13 45 CS2# 73 VCC 101 DQ45 129 NC 157 18 VCC 46 DQM2 74 DQ28 102 VCC 130 DQM6 158 19 DQ14 47 DQM3 75 DQ29 103 DQ46 131 DQM7 159 20 DQ15 48 DNU 76 DQ30 104 DQ47 132 NC 160 21 NC 49 VCC 77 DQ31 105 NC 133 VCC 161 22 NC 50 NC 78 VSS 106 NC 134 NC 162 23 VSS 51 NC 79 CK2 107 VSS 135 NC 163 24 NC 52 NC 80 NC 108 NC 136 NC 164 25 NC 53 NC 81 WP 109 NC 137 NC 165 26 VCC 54 VSS 82 SDA 110 VCC 138 VSS 166 27 WE# 55 DQ16 83 SCL 111 CAS# 139 DQ48 167 28 DQM0 56 DQ17 84 VCC 112 DQM4 140 DQ49 168 Back DQ50 DQ51 VCC DQ52 NC NC DNU VSS DQ53 DQ54 DQ55 VSS DQ56 DQ57 DQ58 DQ59 VCC DQ60 DQ61 DQ62 DQ63 VSS NC NC SA0 SA1 *SA2 VCC PIN NAMES A0 – A11 Address input (Multiplexed) BA0-1 Select Bank DQ0-63 Data Input/Output CK0,CK2 Clock input CKE0 Clock Enable input CS0#,CS2# Chip select Input RAS# Row Address Strobe CAS# Column Address Strobe WE# Write Enable DQM0-7# DQM VCC Power Supply (3.3V) VSS Ground SDA Serial data I/O SCL Serial clock DNU Do not use NC No Connect WP (write protect) option available on pin 81, see ordering information on page 5. ** These pins should be NC in the system which does not support SPD. White Electronic Designs Corp. reserves the right to change products or speciﬁcations without notice. June 2003 Rev. 1 White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com 1 page Whitewww.datasheet4u.com Electronic Designs WED3DG649V-D2 ORDERING INFORMATION Part Number Speed CAS Latency WED3DG649V10D2 100MHz CL=2 WED3DG649V7D2 133MHz CL=2 WED3DG649V75D2 133MHz CL=3 Note: Modules are available in industrial temperature - 40°C ≤ TA ≤ 85°C. Add an "I" to the end of the part number. Part Number Speed WED3DG639V10D2 100MHz WED3DG639V7D2 133MHz WED3DG639V75D2 133MHz Note: Available with WP (write protect) on pin 81. CAS Latency CL=2 CL=2 CL=3 PACKAGE DIMENSIONS .125 (2X) 5.255 MAX. 278 .157 (2X) .350 P1 .450 .614 1.450 .250 2.275 4.550 .250 2.150 ALL DIMENSIONS ARE IN INCHES .150 MAX. 1.000 .700 MAX. .157 MIN. .050 .004 White Electronic Designs Corp. reserves the right to change products or speciﬁcations without notice. June 2003 Rev. 1 White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com 5 Page

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