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1Gb: x8, x16 Automotive DDR2 SDRAM - Micron

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Figure 21: Nominal Slew Rate for t IS<br />

CK<br />

CK#<br />

V DDQ<br />

V IH(AC)min<br />

V IH(DC)min<br />

V REF(DC)<br />

V IL(DC)max<br />

V IL(AC)max<br />

V SS<br />

Setup slew rate<br />

falling signal<br />

Figure 22: Tangent Line for t IS<br />

CK<br />

CK#<br />

V DDQ<br />

V IH(AC)min<br />

V IH(DC)min<br />

V REF(DC)<br />

V IL(DC)max<br />

V IL(AC)max<br />

V SS<br />

V REF to AC<br />

region<br />

=<br />

�TF<br />

V REF to AC<br />

region<br />

Nominal<br />

line<br />

t IS<br />

V REF(DC) - V IL(AC)max<br />

�TF<br />

t IS<br />

Tangent<br />

line<br />

t IH<br />

Nominal<br />

slew rate<br />

t IH<br />

Nominal<br />

line<br />

Setup slew rate<br />

rising signal<br />

�TR<br />

t IS<br />

Setup slew rate<br />

rising signal<br />

�TF �TR<br />

<strong>1Gb</strong>: <strong>x8</strong>, <strong>x16</strong> <strong>Automotive</strong> <strong>DDR2</strong> <strong>SDRAM</strong><br />

Input Slew Rate Derating<br />

t IS<br />

=<br />

t IH<br />

Nominal<br />

slew rate<br />

V REF to AC<br />

region<br />

V IH(AC)min - V REF(DC)<br />

�TR<br />

t IH<br />

Tangent<br />

line<br />

V REF to AC<br />

region<br />

Tangent line (VIH[AC]min - VREF[DC] )<br />

=<br />

�TR<br />

PDF: 09005aef840eff89<br />

1gbddr2_ait_aat.pdf – Rev. C 7/11 EN 56 <strong>Micron</strong> Technology, Inc. reserves the right to change products or specifications without notice.<br />

� 2010 <strong>Micron</strong> Technology, Inc. All rights reserved.

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