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MT47H64M8B6-25ELDTR Datasheet, PDF (64/133 Pages) Micron Technology – 512Mb: x4, x8, x16 DDR2 SDRAM | |||
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512Mb: x4, x8, x16 DDR2 SDRAM
Input Slew Rate Derating
DDR2-667. It is not advised to operate DDR2-800 and DDR2-1066 devices with single-
ended DQS; however, Table 33 would be used with the base values.
Table 33: Single-Ended DQS Slew Rate Derating Values Using tDSb and tDHb
Reference points indicated in bold; Derating values are to be used with base tDSb- and tDHb--specified values
DQS Single-Ended Slew Rate Derated (at VREF)
2.0 V/ns 1.8 V/ns 1.6 V/ns 1.4 V/ns 1.2 V/ns 1.0 V/ns 0.8 V/ns 0.6 V/ns
DQ (V/ns) tDS tDH tDS tDH tDS tDH tDS tDH tDS tDH tDS tDH tDS tDH tDS tDH
0.4 V/ns
tDS tDH
2.0
130 53 130 53 130 53 130 53 130 53 145 48 155 45 165 41 175 38
1.5
97 32 97 32 97 32 97 32 97 32 112 27 122 24 132 20 142 17
1.0
30 â10 30 â10 30 â10 30 â10 30 â10 45 â15 55 â18 65 â22 75 â25
0.9
25 â24 25 â24 25 â24 25 â24 25 â24 40 â29 50 â32 60 â36 70 â39
0.8
17 â41 17 â41 17 â41 17 â41 17 â41 32 â46 42 â49 52 â53 61 â56
0.7
5 â64 5 â64 5 â64 5 â64 5 â64 20 â69 30 â72 40 â75 50 â79
0.6
â7 â93 â7 â93 â7 â93 â7 â93 â7 â93 8 â98 18 â102 28 â105 38 â108
0.5
â28 â135 â28 â135 â28 â135 â28 â135 â28 â135 â13 â140 â3 â143 7 â147 17 â150
0.4
â78 â198 â78 â198 â78 â198 â78 â198 â78 â198 â63 â203 â53 â206 â43 â210 â33 â213
Table 34: Single-Ended DQS Slew Rate Fully Derated (DQS, DQ at VREF) at DDR2-667
Reference points indicated in bold
2.0 V/ns 1.8 V/ns
DQ (V/ns) tDS tDH tDS tDH
DQS Single-Ended Slew Rate Derated (at VREF)
1.6 V/ns 1.4 V/ns 1.2 V/ns 1.0 V/ns 0.8 V/ns
tDS tDH tDS tDH tDS tDH tDS tDH tDS tDH
0.6 V/ns
tDS tDH
0.4 V/ns
tDS tDH
2.0
330 291 330 291 330 291 330 291 330 291 345 286 355 282 365 29 375 276
1.5
330 290 330 290 330 290 330 290 330 290 345 285 355 282 365 279 375 275
1.0
330 290 330 290 330 290 330 290 330 290 345 285 355 282 365 278 375 275
0.9
347 290 347 290 347 290 347 290 347 290 362 285 372 282 382 278 392 275
0.8
367 290 367 290 367 290 367 290 367 290 382 285 392 282 402 278 412 275
0.7
391 290 391 290 391 290 391 290 391 290 406 285 416 281 426 278 436 275
0.6
426 290 426 290 426 290 426 290 426 290 441 285 451 282 461 278 471 275
0.5
472 290 472 290 472 290 472 290 472 290 487 285 497 282 507 278 517 275
0.4
522 289 522 289 522 289 522 289 522 289 537 284 547 281 557 278 567 274
PDF: 09005aef82f1e6e2
512MbDDR2.pdf - Rev. T 2/12 EN
64
Micron Technology, Inc. reserves the right to change products or specifications without notice.
 2004 Micron Technology, Inc. All rights reserved.
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